Y.C. Tripathi | FOREST RESEARCH INSTITUTE, DEHRADUN (original) (raw)

Papers by Y.C. Tripathi

Scientific reports, Apr 2, 2024

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International Journal of ChemTech Research, 13(3):174-180, 2020

The pulp and paper industries discharge of a large amount of effluent as wastewater in the surrou... more The pulp and paper industries discharge of a large amount of effluent as wastewater in the surrounding streams thereby causing serious health and environmental problems. These large quantities of effluents need to be characterized for evolving proper treatment strategy prior to their disposal. Physicochemical characteristics of effluents from agro-based paper mills located in Uttarakhand state of India were analyzed in terms of pH, colour, TS, TDS, TSS, turbidity, BOD, COD, and AOX. The effluent samples collected from different processing units of the paper mill varied considerably across the discharge streams. The mean values pH, colour, TS, TDS, TSS, turbidity, BOD, COD, and AOX were found in the range of 2.55-9.8±0.05, 410-2802 PCU, 1980.65-2785.79 ppm, 1650.67-2470.35 ppm, 315.44-401.35 ppm, 73.22-349.37 NTU, 170.32-670.42, 705.52-2000.55 ppm, and 14.98-40.82 respectively. The result shows that all the studied physicochemical parameters of effluents at different processing units of the mill are higher than the permissible standards that need proper treatment for their safe disposal.

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Journal of Chemical Science and Chemical Engineering. 1(2): 1-6, 2020

Susceptibility of seeds to fungal invasion, proliferation and elaboration of mycotoxins is one of... more Susceptibility of seeds to fungal invasion, proliferation and elaboration of mycotoxins is one of the major factors for the low quality and productivity. The present study was undertaken to investigate the impact of fungal infestation on biochemical content of seeds of two important oil-yielding species namely S. oleoides and S. persica as well as certain physicochemical characteristics of fatty oil. Seeds from ground lying fruits of the two species were collected and segregated into three groups based on level of infestation. Altogether eight dominant fungi were isolated and identified as Aspergillus candidus, A. flavus, A. niger, Fusarium oxysporum, Penicillium chrysogenum, Rhizoctonia solani, Rhizopus nigricans and Sclerotium rolfsii based on specified characteristics. Results of the biochemical analysis showed significant decrease in fatty oil, crude protein and carbohydrate contents across the different infestation levels as compared to healthy seeds. The acid values of fatty oil from seeds of S. oleoides and S. persica constantly increased to a higher value throughout the level of infestation. Further, an increase in saponification value and a decrease in the iodine number of the fatty oils was also recorded all over the infestation levels. The results are in agreement with the previous studies on aspects similar to various other oilseeds.

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International Journal of Herbal Medicine, 8(3):47-58, 2020

A study has been conducted during 2003 -2007 for Medico floristic evaluation and compilation of i... more A study has been conducted during 2003 -2007 for Medico floristic evaluation and compilation of indigenous knowledge of the people of the River Island Majuli. The people of Majuli are very poor and are not acquaintance with recent scientific developments. The area is also inhabited by a number of communities namely, Deori, Mising, Koch, Kachari, Brahmin, Kalita, Kalibatra, Kayastha, Nath, Chutia, Bengali etc. traditionally using medicinal plants for curing and control of several diseases. About 52 plant species were recorded from villages of two sub-divisions viz. Kamalabari and Garamur of Majuli that used as anti-diabetes. Among the recorded species near about 50% are wild and indigenous. Out of the 52 species almost all were recorded to use as plant extracts. Different plant parts of the species were utilized such as leaves of 16 plant species, fruits of 10 plant species, tender shoots of 5 plant species, seeds of 5 plant species, whole plant of 4 species, rhizome of 4 plants, stem and stem bark of 3 plant, flowers of 3 plant, bulbs of 2 plants and root of 1 plant species. Phytomedicines are commonly practices by the ethnic of Majuli mainly by tribes and Bhakat (Devotee) of Satra and method of indigenous preparation for prevention, curing and control of diabetes reported.

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Indian Forester, 2022

Dyes derived from plants have emerged as an important substitute to synthetic dyes. However, the ... more Dyes derived from plants have emerged as an important substitute to synthetic dyes. However, the total share of natural dyes in textile sectors is very minimal due to certain technical and sustainability issues involved in their production and use. Inconsistent supply of raw material is one among them that is hampering the desired pace of their production and applications. Therefore, exploration of increasingly new plant sources of natural dye is warranted. The present investigation was aimed at introducing natural dye extracted from the leaves of Lannea coromandelica for dyeing different kinds of fabrics. Natural dye was extracted from the leaves by aqueous extraction and dyeing performance on silk, wool, and cotton fabrics under post mordanting condition were evaluated in terms of CIE L* a* b* values and fastness properties of the dyed fabrics using standard methods according to international standards. Majority of dyed fabric samples exhibited colour fastness in the range of very good to excellent. The study leads to the conclusion that dye extracted from L. coromandelica leaves can be used as a colorant for textile dyeing thus establishing the plant leaves as a feasible and promising source of natural dye.

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Indian Forester, 2022

The intrinsic potential of biodiversity as a key resource for developing novel value-added produc... more The intrinsic potential of biodiversity as a key resource for developing novel value-added products of commercial importance has been increasingly realized in recent years. During the past few decades, there has been an upsurge in chemoprospecting of phytoresources across the world for the discovery of medicines, nutraceuticals, food and feed, fibre, fragrance and flavor, colourants, pest control agents, and a diverse array of marketable green products for a safe and healthier future of mankind and environment. The UN-SDG calls for a world free from hunger and malnutrition, and health for all apart from sustainable energy and ecological safety. Owing to their exceedingly complex chemical makeup and diverse biological functions, plants offer innumerable opportunities for addressing the various pressing challenges of the world like food and nutrition security, energy sustainability, and environmental safety, through their chemoprospecting. As far as the discovery of novel drugs is concerned, chemoprospecting of plants remains today an essential element and there are several modern medicines developed through phyto-chemoprospecing. Also, plants being a source of vitamins, amino acids, minerals, and many other macro and micro nutrients can be used in an amplified manner for their tendency to effectively aid metabolic and lifestyle disorders apart from providing nutrition. Commercial utilization of natural fibers is dependent upon their properties, price and recyclability. As yet, cotton is considered as the best natural fiber and industry is heavily dependent on it. There is a need to explore non-conventional sources of fibre that may prove to be abundant and good sources of fiber. Fatty oil industry is one of the foremost industries in the world with a massive turnover next to petrochemicals. Owing to the shortage of fatty oils from tree-borne oilseeds, the unconventional plant sources of fatty oils also require systematic exploration. Essential oil-bearing crops have vast potential for enhanced utilization by shifting from low-value and high-volume products to high-value, low-volume products. The development of a facile and efficient protocol for the isolation of essential oil constituents can lead to the recovery of fine chemicals with diverse biological and industrial applications. The current phytoproducts management and utilization practices need reforms in consonance with the contemporary needs of society. Phytochemical prospecting may lead to the development of facile protocols and useful products. The technologies/products developed can also save the onslaught of highly valuable endangered species. The article emphasizes the potential and prospects of biocentric chemoprospecting in the realization of sustainable development goals.

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Journal of Medicinal and Aromatic Plant Sciences, 2000

ABSTRACT

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INTERNATIONAL JOURNAL OF APPLIED PHARMACEUTICAL SCIENCES AND RESEARCH

Increased environmental consciousness coupled with detrimental impacts of synthetic dyes and cons... more Increased environmental consciousness coupled with detrimental impacts of synthetic dyes and consumers’ concern over hygiene, cleanliness and protection, the demand for functional textiles has increased in recent years. Antimicrobial finishing imparts protective properties to textiles besides attractive shades. The study was aimed to determine the antifungal activity of colourants from aerial biomass of Perilla frutescens and dyed fabrics against pathogenic fungi infesting textiles materials. Antifungal activity of natural dye extracted from aerial biomass of Perilla frutescens against the selected pathogenic fungi viz., Aspergillus niger, Aspergillus flavus, Fusarium moniliforme, Fusarium solani, and Penicillium decumbens was evaluated by agar-well diffusion method. The MIC of the natural dye against each of the test fungi was determined by broth dilution method. Dyed silk, wool and cotton fabrics were also evaluated for antifungal activity by standard method. The natural dye showe...

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Research Journal of Forestry

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Analytical Chemistry Letters, 2015

Abstract To establish the fingerprint profile of Swertia chirayita (Roxb. ex Fleming) Karsten fro... more Abstract To establish the fingerprint profile of Swertia chirayita (Roxb. ex Fleming) Karsten from the high altitude area of the western Himalaya using high performance thin layer chromatography (HPTLC) technique. Dried and powdered plant material of S. chirayita was successively extracted with petroleum ether, ethyl acetate and methanol in the order of increasing polarity. The extracts so obtained were subjected to qualitative phytochemical screening and based on the presence and/or absence of phytochemical constituents, HPTLC fingerprinting analysis of ethyl acetate and methanol extract were carried out using CAMAG HPTLC system. Preliminary phytochemical screening of the extracts showed the presence of alkaloids, terpenoids, phenolics, flavonoids, carbohydrates, glycosides, tannins, saponins and lipids in various extracts. Methanol and ethyl acetate extracts contained the maximum number of phytochemicals. HPTLC phytochemical fingerprinting led to the detection of altogether 21 compounds in ethyl acetate and methanol extracts. However, greater numbers of compounds were detected in methanol extracts as compared to ethyl acetate extract. The chromatographic fingerprinting revealed the presence and variation in the phytochemical constituents with change in the polarity of the solvents. Further studies are required for the quantification of the compounds in various extracts and evaluation of their medicinal activities.

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Use of botanicals (Azadirachta indica, Annona squamosa, Calotropis procera, Cannabis sativa, Pong... more Use of botanicals (Azadirachta indica, Annona squamosa, Calotropis procera, Cannabis sativa, Pongamia pinnata, Datura metal, Melia azedarach, Moringa oleifera, Vitex negundo etc) for prevention of insect pests/diseases without any harmful effect have been mentioned in the ancient Indian literatures. During the last three decades, many reports have appeared on pesticides of plant origin exhibiting diverse biocidal efficacies. These pesticides are readily biodegradable, do not accumulate in air, soil and water or on plants, quite safe for non-target human and animal subjects and have no effect on the colour, taste and appearance of the treated plants. The present article presents an account of promising botanicals with significant biocidal value along with probable biologically active chemical constituents so as to get a quick idea of their feasibility for utilization as a component in the strategy of Integrated Pest & Disease Management.

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Traditional medicine systems like Ayurveda, Chinese, Unani, Siddha and Tibetan primarily based on... more Traditional medicine systems like Ayurveda, Chinese, Unani, Siddha and Tibetan primarily based on medicinal plants are once again gaining mounting credibility across the globe. The last three decades have seen substantial markets growth in herb and herbal product such as health foods and supplements, herbal drinks and various health and personal care products. Also, rapidly rising exports of medicinal plants during the past decade attests to worldwide interest in these products. According to an estimate, the domestic market for medicinal plant-based products is growing at an annual rate of 20% while the international market is growing at 7% per annum. However, bulk of the plant materials traded domestically and internationally are still wild harvested. This has created a tremendous pressure on the natural resource base and has reached crisis point for some species. With dwindling supplies from natural sources and increasing global demand, the MAPs are need to be cultivated to ensure...

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International journal of biological macromolecules, 2014

Polysaccharides containing uronic acids are of immense biological significance. Colorimetric meth... more Polysaccharides containing uronic acids are of immense biological significance. Colorimetric methods using different chromogens have been explored for uronic acid estimation in polysaccharides but these methods counter numerous difficulties, when neutral sugars are present in substantial amount. The uronic acid content of cold water-soluble polysaccharide (CWSP) and hot water-soluble polysaccharide (HWSP) isolated from Tinospora sinensis, widely known for marked therapeutic significance has been studied. The uronic acid was quantitatively estimated by spectrophotometric methods using carbazole, 3-phenylphenol and 3,5-dimethylphenol (DMP) vis-a-vis gas-liquid chromatography (GLC) analysis. Galacturonic acid in CWSP and HWSP was estimated as 1.41% and 1.20% respectively. The findings bring to light, the efficacy of chromogens and also reveal to what extent, they could be relied upon. The results also indicated higher specificity and selectivity of DMP over carbazole and 3-phenylphenol...

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Saffron ( Crocus sativus L.), primarily a Mediterranean herb has been valued since antiquity not ... more Saffron ( Crocus sativus L.), primarily a Mediterranean herb has been valued since antiquity not only as a culinary condiment, but also as a source of dye, perfume and medicine. It is well known for its diverse uses such as a food additive and a palliative agent for many human diseases. Medicinally, Saffron is regarded as tonic and antidepressant and has been used in various ancient cultures for strengthening digestion, relieving coughs, smoothing menstruation, relaxing muscle spasms, calming anxiety and improving mood. Phytochemical investigation of Saffron has led to the isolation and characterization of a number of active chemical constituents. Pharmacological studies have only validated the traditional medicinal claims of Saffron but also discovered further therapeutic efficacies. In view of its diverse therapeutic efficacy, saffron can be a promising candidate with potentials for new drug design. Phytochemical, pharmacological varied uses and quality control aspects of saffron ...

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The Indian Forester, 2010

Wetland ecosystem, the storehouse of renewable bio resources and biodiversity provides habitat an... more Wetland ecosystem, the storehouse of renewable bio resources and biodiversity provides habitat and shelter to several plant, animal and microorganisms contributing significantly to the human livelihood and economy. People of Assam state have traditionally been utilizing these resources to fulfill their needs. However, wetlands of the state are under severe anthropogenic stress resulting into shrinkage of area and consequent loss of valuable resources and ecosystem as a whole warranting immediate conservation actions. The paper attempts to underline the concept of linking traditional knowledge with modern science and technology for sustainable bio resources utilization and biodiversity conservation of wetlands of Assam. Status and potential of wetland bio resource of Assam State for bio fertilizer and bio fuel production are discussed and appropriate agroforestry models are suggested for their conservation, management and productivity enhancement.

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Agave species has been used from an ancient era for the production of fiber and alcohol, however ... more Agave species has been used from an ancient era for the production of fiber and alcohol, however apart from the fibre, Agave species especially A. sisalana is rich in the phytoconstituents responsible for the potent medicinal activities. An attempt is made to emphasize the reported phytochemicals and therapeutic utilization of Agave sisalana plant with some of its other beneficial uses globally.

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Journal of Pharmacy Research, 2016

Background: Natural antioxidants have the ability to protect organisms from damage caused by free... more Background: Natural antioxidants have the ability to protect organisms from damage caused by free radical-induced oxidative stress. A lot of research has been carried out worldwide for finding natural antioxidants of plant origin. The present study was aimed to evaluate the phytochemical composition, total phenolic and flavonoid contents and antioxidant activity of P. cerasoides leaves. Methods: Extracts of P. cerasoides leaves were phytochemically examined for presence of different phytochemicals by standard methods. Total phenolic content of the various extracts was determined spectrometrically using Folin-Ciocalteu method, total flavonoid content by reported method and antioxidant efficacy by following DPPH radical scavenging protocol. Results: Phytochemical screening showed the presence of alkaloids, steroids, terpenoids, flavonoids, phenolics, tannins, saponins, glycosides, carbohydrate, protein and amino acids in different extracts of P. cerasoides leaves. Methanol extract recorded the maximum number of chemical constituents. Presence of flavonoids and phenolic constituents were mostly found in extracts obtained with solvents of medium and high polarity. The total phenolic content (6.26±0.033 mg GAE/g of extract), total flavonoid content (3.86±0.016 mg QE/g of extract) and free radical scavenging (antioxidant) activity (IC50, 56.00±0.242 μg/ml) were highest in methanol extract. Total phenolic content had positive correlation with antioxidant capacity. Conclusions: The present study established leaves of P. cerasoides as rich sources of phenolic compounds and natural antioxidants. The study further provided scientific basis to traditional medicinal claims of the plant.

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Santalum album L. (Santalaceae) commonly known as Indian Sandalwood is one of the oldest and prec... more Santalum album L. (Santalaceae) commonly known as Indian Sandalwood is one of the oldest and precious sources of natural fragrance with immense medicinal and commercial significance. S. album has been grown in India for the last 25 centuries and esteemed all over the world for its sweet, long-lasting and medicinally valued fragrant oil. Sandalwood and the essential oil derived from sandal heartwood have been used in various traditional systems of medicine, like Ayurveda, Siddha and Unani medicine in the treatment and prevention of wide range of ailments. The versatile therapeutic and healthcare importance of sandawood is attributed to the rich source of phytochemicals particularly sesquiterpeness. A thorough bibliographic investigation was carried out by analyzing worldwide accepted scientific database (Pub Med, SciFinder, Scopus, ACS and Web of Science), recognized books, Indexed as well as non indexed journals. Modern pharmacological studies have demonstrated a wide range of pharm...

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Scientific reports, Apr 2, 2024

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International Journal of ChemTech Research, 13(3):174-180, 2020

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Journal of Chemical Science and Chemical Engineering. 1(2): 1-6, 2020

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International Journal of Herbal Medicine, 8(3):47-58, 2020

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Indian Forester, 2022

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Indian Forester, 2022

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Journal of Medicinal and Aromatic Plant Sciences, 2000

ABSTRACT

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INTERNATIONAL JOURNAL OF APPLIED PHARMACEUTICAL SCIENCES AND RESEARCH

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Research Journal of Forestry

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Analytical Chemistry Letters, 2015

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International journal of biological macromolecules, 2014

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The Indian Forester, 2010

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Journal of Pharmacy Research, 2016

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Abstract Book, Jul 14, 2006

Forest management encompasses varied subjects which require a holistic and multidisciplinary appr... more Forest management encompasses varied subjects which require a holistic and multidisciplinary approach in an integrated manner. For which extension of need based informations and technologies and adoption of action oriented programmes is the need of the hour. In this context, forestry extension is vital in motivating and educating people and management of forest and varied range of forest produce that play and important role in socioeconomic upliftment of rural and tribal communities. Realizing the need of information dissemination and transfer of technology, the Rain Forest Research Institute (RFRI), Jorhat has been organizing training, workshops, technology demonstrations, scientific exhibitions on various topics such as Ecology and Biodiversity Conservation, Tree Improvement and Propagation, Biomass and Productivity, Nursery Technology and Management, Rural Development Forestry and Cultivation of Bamboo and Rattan for various user groups under ‘Lab to Land Programme’. Infact the confidence in research and extension is the base for future development in forestry to meet any challenge to the economy and globalization. The development of research extension linkage involving technology transfer by communication of research findings to the various user groups, creation of public awareness and effective collaboration between users and scientific groups certainly brings a better interface between researchers and users. In this background, a Regional Workshop on Forestry Extension was organized on 14th July 2006 at RFRI to discuss various issues related to forestry extension and highlight the strategies leading to effective implementation of various forestry extension programmes.

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Edited Book, Jan 2002

Unabated environmental deterioration and depletion of biological resources with rapid increase in... more Unabated environmental deterioration and depletion of biological resources with rapid increase in human population have questioned the survival of human race on the living plante earth. In fact, undesirable human activities have stolen the future of biological environment. Problems are many but solutions are quite limited. Scientists and policy makers are trying hard to find out the possible remedies. The book dealing with 27 important and interesting titles projects various burning issues related to bioresource and environment and their possible remedies. The entire work has been divided into seven valuable sections. The first section is concerned with the problem of global environment and peace. It discusses as to how peace can be had with the biosphere and what possible relations exits among man, environment and peace? The second section describes floral invasions and global change referring terrestrial plant invasions, vegetation response to CO2 enrichment and impact of acid rain on ecosystem. The subsequent section covers Perishing resources dealing with wetlands, avalanche, environmental management at Antarctica and disaster management. Fourth section is on chemical pollution and resource protection describing effect of pesticides and heavy metals on animals and protection of living resources. Fifth section is concerned with the agroenvironment including assessment of impact of environmental degradation on agricultural production, environmental amelioration, forest protection and control of water pollution for sustainable agriculture. The sixth section describes biodiversity and its conservation. The last section is confined to biological remediation. Overall the book is useful in the present scenario of global environmental change.

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Edited Book, Jan 2002

The book contains 24 chapters written by distinguished scientists in the areas of their specializ... more The book contains 24 chapters written by distinguished scientists in the areas of their specializations. The entire compilation has been divided into seven sections comprising of Biological diversity, horizons of biotechnology, floral and Faunal resource technology, Molecular Designing and regulations, biopotential, evaluation, Environmental cleaning and Scientific interaction. There is a critical Review on Biodiversity with emphasis on conservation of species. Horizons in biotechnological research, contributions of Biotechnology to Sustainable Development and Plant biodiversity for immunomolulation have been discussed. Floral and faunal Technology describes Tobacco as a Model system, Seed production technology in hills, biotechnological potentials of Nematodes and use of Silkworm in toxicity and mutagenicity testing. Molecular technology includes biodegradable polymers hormonal regulation of Biochemical potential hydrolysis of lignocellulose and hib Transformation of betalactam antibiotics. Biopotential evaluation section deals with Importance of living avian resources, potentials of resorptive bodies and Animal energy in agriculture. Environmental biotechnology describes reduction strategies of Methane emitted from ruminant animals. This section also includes harnessing's Nature capability of self-cleansing. Last section deals with the basis of interactions between scientists and managers/policymakers for future bioscientific and socioeconomic development. The complete book is important and interesting in the present era of drastic biological and biotechnological advancements.

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International Herbal Fair [NTFP: Conservation through Awareness and Dissemination of Indigenous Traditional Knowledge], December 14-20, 2017 Bhopal, M.P., India, 2017

Traditional knowledge related to herbal remedies has been the basis of healthcare for local and e... more Traditional knowledge related to herbal remedies has been the basis of healthcare for local and ethnic communities for long and still playing a key role in development of new drug leads in modern therapeutic system as well. The modern era of drug research shifted its attention towards these folk plant-based remedies considering the ailing impacts of synthetic medicines. With the advancement in the techniques of phytochemistry and pharmacology, many active principles of medicinal plants were isolated and introduce as valuable drugs in modern system of medicine. Consequently, a great deal of work has been done towards isolation and characterization of several new bioactive molecules and development of novel effective medications during the past few decades. In spite of the development of a number of modern drugs, there is still genuine need to develop new therapeutic agents especially for those diseases for which no satisfactory cure is available in modern system of medicine. In this context the traditional therapeutic knowledge about array of plant species may provide important first-hand leads.

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Conference Presentation

Systematic study was undertaken to develop commercially viable natural dyes from selected plants ... more Systematic study was undertaken to develop commercially viable natural dyes from selected plants namely, Barleria prionitis, Perilla frutescens and Melia composita. Systematic studies and procedural optimization led to the recovery of natural dyes from the three species in considerable amount. Natural dyes produced out of the three species adequately qualify all standard fastness norms. Dyeing with natural colours has been an occupation of a whole community of weaver and dyers in different parts of India. Production and marketing of natural dye involve chains of economic connections between forest dwellers, traders, dye producers and finally users. The outcome of the work may be beneficial for natural dyes based entrepreneurial development in the region.

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Conference Presentation

The study deals with total phenolic, total flavonoid and luteolin contents of some important wild... more The study deals with total phenolic, total flavonoid and luteolin contents of some important wild edible species of the region namely Prunus armeniaca, Pueraria tuberosa, Myrica esculenta, Hippophae rhamnoides and Callicarpa macrophylla. Luteolin content was recorded in the range of 209 – 662 mg/kg in the edible parts of the species investigated. The highest luteolin was recorded in M. esculenta fruits and lowest in P. tuberosa roots (rhizomes). The study leads to the conclusion that greater awareness and promotion of these wild edibles may address the issue of nutritional security among rural and forest-dependent communities. Wild species can be utilized for preparation of value added products like health drinks, nutraceuticals, etc thus supporting and enhancing the economic status of the region.

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Conference Paper

Polysacharides containing uronic acids are of immense biological significance. Colorimetric metho... more Polysacharides containing uronic acids are of immense biological significance. Colorimetric methods using different chromogens have been developed for uronic acid estimation in polysaccharides but the methods counter numerous difficulties, when neutral sugars are present in significant amount. The paper discusses about the uronic acid content of its cold water-soluble polysaccharide (CWSP) and hot water soluble polysaccharide (HWSP) of Tinospora sinensis using assorted approaches based on spectrophotometric methods and gas-liquid chromatography (GLC). Galacturonic acid in CWSP and HWSP was estimated as 1.41% and 1.20% respectively. The findings bring to light, the efficacy of chromogens and also reveal to what extent, they could be relied upon. The results also indicate higher specificity and selectivity of DMP over carbazole and 3-phenylphenol. GLC analysis of alditol acetates indicated L-rhamnose, L-arabinose, D-mannose, D-galactose and D-glucose in molar ratio 0.178, 0.259, 0.140,1.045 and 98.377 in CWSP and L-rhamnose, L-arabinose, Dxylose, D-mannose, D-galactose and D-glucose in molar ratio 0.608 ,0.628, 0.978, 0.227, 0.111 and 97.448 in HWSP

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Conference Paper

The paper presents the work done on fine structural analysis of T. sinensis, well known for its t... more The paper presents the work done on fine structural analysis of T. sinensis, well known for its therapeutic use in traditional medicine systems like Ayurveda, Siddha, Unani, Indian and Chinese.. CWSP and HWSP were isolated in yield 9.1% and 2.1% respectively. Complete hydrolysis followed by GLC analysis of alditol acetates indicated L-rhamnose, L-arabinose, D-mannose, D-galactose and D-glucose in molar ratio 0.178, 0.259, 0.140,1.045 and 98.377 in CWSP and L-rhamnose, L-arabinose, D-xylose, D-mannose, D-galactose and D-glucose in molar ratio 0.608, 0.628, 0.978, 0.227, 0.111 and 97.448 in HWSP. The uronic acid content was studied by assorted approaches. It was estimated by spectrophotometric methods using chromogens carbazole, m-hydroxydiphenyl and 3,5-dimethylphenol and the results were corroborated by GLC analysis. The studies noticeably brought to light, the efficacy of chromogens and also revealed to what extent, they could be relied upon. In T. sinensis, the galacturonic acid content was reported as 1.41% and 1.20% in CWSP and HWSP respectively. Linkages in polysaccharide chains are being studied through methylation studies, periodate oxidation and other degradative techniques.

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Conference Paper

Interest in natural dyes for textile applications is growing due to toxic and allergic reactions ... more Interest in natural dyes for textile applications is growing due to toxic and allergic reactions associated with synthetic dyes and the stringent environmental standard imposed across the world. However, chemical mordant containing heavy metal ions such as copper, cadmium, iron, aluminium, tin, etc., used to enhance the natural dye uptake and fastness properties on fabrics dyed has led to the criticism that the dyeing processes using natural dyes is as polluting as that of pre-metalized synthetic dyes. Such heavy metals only cause environmental problems, but have also raised serious health concerns regarding their long-term effects to skin. Chitosan, a linear polysaccharide composed of randomly distributed -(1-4)-linked D-glucosamine and N-acetyl-D-glucosamine has got a wide application as a substitute for the various chemicals used in textile dyeing and finishing. It has been used as a pre-treatment agent in dyeing of cotton in textile printing, wool dyeing, shrink proofing and durable press finishing. The paper deals with application of polysaccharides as non-toxic and ecologically amiable substitute of heavy metal mordants in textile dyeing with natural dyes.

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Conference Paper

Persistent realization of the role of carbohydrates in biological functions coupled with ensuing ... more Persistent realization of the role of carbohydrates in biological functions coupled with ensuing need for their synthesis as biological tools and their huge presence as eco-friendly renewable chemical resource providing numerous economic opportunities has been the major drivers for advances in carbohydrate science. Preferential localization in the extracellular domain and high level of chirality make carbohydrates ideal binding partners for proteins involved in intercellular communication, which is vital in controls of many biological processes. Recent research in the niche area of glycotherapeutics has revealed that carbohydrates actually have many more roles in biological systems than previously thought. Carbohydrates are likely to make a major therapeutic impact in parasitic and mycobacterial disease, asthma, rheumatoid arthritis, etc. Other new-fangled areas include development of glycosaminoglycans and glycomimetics, glycosylation of antibodies, modification of glycoconjugates, pharmacology of O-glycopeptides and recombinant glycoprotein are under investigation. Creditable accomplishments and projected upshots conceivably point toward a bright future of glycotherapeutics.

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Conference Paper

Clinical and epidemiological studies have shown that functional food carbohydrates seem to exert ... more Clinical and epidemiological studies have shown that functional food carbohydrates seem to exert health-enhancing effects. Carbohydrates are important for fat oxidation and can also be converted into protein. However, growing interest in functional foods demands a critical look at the beneficial health impacts of carbohydrates like cereal beta-glucans, microbial polysaccharides, chitosan, arabinoxylans, resistant starch, and other plant derived polysaccharides. Carbohydrates have physiological and metabolic effects on specific chronic diseases such as cancer, diabetes, cardiovascular disease, obesity, and various gastrointestinal disorders. Starchy carbohydrates provide an important source of energy and dietary fibre has a number of functions including keeping the digestive system healthy. More recently, soluble fibre such as beta-glucan has been shown to have effects on the glycaemic, insulin, and cholesterol responses to foods. The paper accentuate that while a great deal of functional versatility and health benefit of carbohydrates is revealed, future research and recommendation must be based on a firm blend of multidisciplinary findings including epidemiological, metabolic, clinical and nutritional aspects.

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Abstract Book of National Symposium on Public Participation in Environmental Protection, December 22-23, 1997

The paper discusses about the status of natural environment in India and repercussion of environm... more The paper discusses about the status of natural environment in India and repercussion of environmental degradation and put forward some remedial measures for alleviation.

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Abstract Book of National Conference on Conservation, Improvement and Sustainable Use of Medicinal Plants and Non-Wood Forest Products, 8–9 March 2011

Leaf protein concentrate (LPC), a concentrated form of the proteins obtained from plant leaves ha... more Leaf protein concentrate (LPC), a concentrated form of the proteins obtained from plant leaves has been assessed for human or animal food source, because it is potentially the cheapest, most abundant source of available protein. This has recently led to renewed interest in LPC to reduce the use of human-edible vegetable protein sources in animal feed. However, the challenges that have to be overcome before establishing LPC a viable protein source for humans include the high fiber content and other antinutritional factors such as phylate, cyanide and tannins. As such the area requires adequate scientific and technological intervention so as to develop feasible and cost-effective methods for enhancing LPC production while minimizing the possibility of denaturation and eliminating antinutritional factors.

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Abstract Book of National Conference on Conservation, Improvement and Sustainable Use of Medicinal Plants and Non-Wood Forest Products, 8–9 March 2011

Flavonoids represent a large group of secondary plant metabolites that are widespread in the plan... more Flavonoids represent a large group of secondary plant metabolites that are widespread in the plant kingdom. They are known to be synthesized by plants in response to microbial infection. It is therefore logical that they have been found in vitro to be effective antimicrobial substances against a wide array of micro-organisms. A considerable amount of research has been directed towards their antimicrobial properties. However, the structure-activity relationships with regard to antimicrobial activity of flavonoids are contradictory. Flavonoids attracted growing interest during the last decade and as a result of global upsurge in research, the number of known flavonoids in the plant kingdom possessing several biological effects has increased dramatically. As is known, the structural diversity provided by natural products is greater than that provided by most synthetic molecules; the natural flavonoid structures may provide lead in molecular designing for specific pharmacological purpose through a better understanding of structure-activity relationship.

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Abstract Book of National Conference on Conservation, Improvement and Sustainable Use of Medicinal Plants and Non-Wood Forest Products, 8–9 March 2011

The North-East region of India has enormous potentials in terms of wide ranging economically impo... more The North-East region of India has enormous potentials in terms of wide ranging economically important products including natural dyes. In view of the urgent need of exploring plant sources for natural dyes, species namely Aporusa dioica (Tamsir) Syn. A. roxburghii, Baccaurea ramiflora (Leteku) Syn. B. sapida and Bischofia javanica (Urium) of the region were investigated for yield and quality of dye and dyeing properties. The study revealed the three species as commercially significant source of natural dyes with yield in the range of 8.0-9.0%. Dye materials extracted offered varied range of colours under different mordanting conditions. The shades showed remarkable colour fastness properties and were compared with the nearest equivalent shade in accordance with textile colour guide. The study thus pointed out the possibility of producing varied natural colours from plant resources of the region.

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Abstract Book of National Conference on Conservation, Improvement and Sustainable Use of Medicinal Plants and Non-Wood Forest Products, 8–9 March 2011

Natural health products are in high demand due to changing consumer concerns and attitudes. Incre... more Natural health products are in high demand due to changing consumer concerns and attitudes. Increasingly popular among them are functional foods and nutraceuticals that beyond their basic nutritional functions contain natural bioactive chemical compounds with scientifically proven properties to provide health benefits and/or prevent diseases. Novel forest-based nutraceuticals include plant sterols, polyphenols, sugars, etc. A growing area of interest is the impact of trace chemicals, collectively called phytochemicals upon human health. Herbal components are among the key ingredients of functional foods and enjoy a good share in the functional food market. For centuries, diverse forest ecosystems provided nutritious foods for its aboriginal inhabitants. Such food plants could provide economic development opportunity for their commercial exploitation in the form of functional food and nutraceuticals which is potentially lucrative and sustainable. The challenge lies in isolating the effective ingredients in a cost-effective manner while maintaining their inherent functional and nutritional traits and converting them into marketable plant based nuratceutical products.

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: Abstract Abstract - National Symposium on Combating Pollutants Accumulation in Ecosystem for Sustainable Agriculture, October 27-28, 1998

Green foliages absorb, accumulate and integrate pollutants resulting in manifestation of injury i... more Green foliages absorb, accumulate and integrate pollutants resulting in manifestation of injury in the form of chlorosis, nectosis, tipburn, etc, decreased root/shoot ratio, less flowering heads and reduced weight of fruits. However, not all plant species are equally sensitive to accumulate equal amounts of pollutants as stomatal conductance varies among taxa. It is, therefore, possible to correlate the intensity of air pollution with various forms of manifestations of different plant species growing in a particular area. Observations on morphological and biological changes in sensitive plant species have provided a tool for monitoring pollutant intensity from the source and for determining the magnitude of their distribution in the environment around the source. The paper attempts to highlight the possibilities of using some of the plant species of Rajasthan as bio-monitoring agents.

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Abstract Abstract - National Symposium on Combating Pollutants Accumulation in Ecosystem for Sustainable Agriculture, October 27-28, 1998

Excessive use of chemical fertilizers and pesticide has resulted reduction in fertility of top pr... more Excessive use of chemical fertilizers and pesticide has resulted reduction in fertility of top productive soil, excessive mortality and reduced reproductive potential in organisms, changes in the abundance of species and the diversity of ecosystem, reduction in the productive potential of natural resources and the development of pesticide resistance in target and non target species. These chemicals constituted a significant source of contamination of air, groundwater, soil and food which has become a threat to all the living subjects on this planet earth. Majority of synthetic pesticides are not easily degradable and tend to enter food chains thereby spreading their toxic effects through ecological cycling and biological magnification and cause serious health problems.

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Conference Abstract Book

Fibre extraction and its allied activities like processing and making value added products are pr... more Fibre extraction and its allied activities like processing and making value added products are proven sources of employment and income generation. However, use of Sisal (Agave sisalana) fibre is limited to making twine, rope and cordage, handicrafts and to some extent used in low-cost paper, dartboards, buffing cloth, mattresses, etc. owing to cumbersome extraction method though it can be extensively applied to high-end industrial products like corrugated polyester sheets, fabrics, speciality paper, filters, geotextiles, wall coverings, etc. Conventionally, Sisal fiber is extracted by decorticator, which apart from being highly unsafe does not provide good quality fibers. The mechanical process also results in considerable damage to the fibre and consequent low yield. Extracting fibre through retting of sisal leaves is time consuming, water intensive, unhygienic and eco-unfriendly. Chemical methods used worldwide are also not conducive as the large amount of chemical used for pretreatment are unsafe to the environment, thus have the problem of disposal. In view of all these facts, an easy and eco-friendly method has been developed for Sisal fiber extraction through biological pre-treatment of leaves. The paper discusses about a simplistic and ecofriendly process for good quality fibre from Sisal Leaves.

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Conference Abstract Book

The art of dyeing is as old as human civilization and plants have been used for the extraction of... more The art of dyeing is as old as human civilization and plants have been used for the extraction of a majority of natural dyes since antiquity. Since the last few years there has been a renewed interest in natural dyes which are considered eco-friendly, biodegradable and produce soft colours in harmony with nature. Furthermore, the residual vegetal matter left after extraction of dyes can be easily composted and used as fertilizer. Forests of Uttarakhand state hold splendid populations of several dye-yielding plants; however knowledge about their end-use with particular reference to production of natural dye has been lacking. With this milieu, three species of the state namely, Barleria prionitis, Perilla frutescens and Melia composita were investigated and naturaldyes produced adequately qualify all specified fastness assessment. Dyeing with natural colours has been an occupation of a whole community of weaver and dyers in different parts of India. Production and marketing of natural dye involve chains of economic connections between forest dwellers, traders, dye producers and finally users. Hence, natural dyes production and use in the state has great potential with regard to the creation of local livelihood opportunities. The outcome of the work may create awareness and greater appreciation of plant biodiversity among the communities and enable rural, tribal and forest-dependent communities to use resources native to their land and build local capacities to create micro-enterprises around natural dyes.

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