priyanka singh | RGTU BPL (original) (raw)

Papers by priyanka singh

Research paper thumbnail of Angle-dependent XPS analysis of silicon nitride film deposited on screen-printed crystalline silicon solar cell

Solar Energy Materials and Solar Cells, 2009

Research paper thumbnail of Temperature dependence of I– V characteristics and performance parameters of silicon solar cell

Solar Energy Materials and Solar Cells, 2008

Research paper thumbnail of Biodeterioration of some herbal raw materials by storage fungi and aflatoxin and assessment of Cymbopogon flexuosus essential oil and its components as antifungal

International Biodeterioration & Biodegradation, 2009

Deterioration of raw materials of six medicinal plants viz. Terminalia arjuna, Acorus calamus, Ra... more Deterioration of raw materials of six medicinal plants viz. Terminalia arjuna, Acorus calamus, Rauvolfia serpentina, Holarrhena antidysenterica, Withania somnifera and Boerhaavia diffusa was examined. Some of the contaminated raw materials were found to be deteriorated by ...

Research paper thumbnail of Efficacy of Lippia alba (Mill.) N.E. Brown essential oil and its monoterpene aldehyde constituents against fungi isolated from some edible legume seeds and aflatoxin B 1 production

International Journal of Food Microbiology, 2009

Research paper thumbnail of Fungal Contamination of Raw Materials of Some Herbal Drugs and Recommendation of Cinnamomum camphora Oil as Herbal Fungitoxicant

Microbial Ecology, 2008

The paper explores fungal infection and aflatoxin B1 contamination of six medicinal plant samples... more The paper explores fungal infection and aflatoxin B1 contamination of six medicinal plant samples viz. Adhatoda vasica Nees, Asparagus racemosus Linn., Evolvulus alsinoides Linn., Glycyrrhiza glabra Linn., Plumbago zeylanica Linn. and Terminalia chebula Retz. A total of 858 fungal isolates were detected from the raw materials. Maximum number of fungal isolates was detected from A. racemosus (228). The genus Aspergillus was found to be the most dominant genus causing infection to most of the raw materials. Among the 32 isolates of A. flavus tested, 13 isolates were found to be toxigenic elaborating aflatoxin B1. The highest elaboration of aflatoxin B1 was 394.95 ppb by the isolates of A. flavus from G. glabra. The essential oil of Cinnamomum camphora (L.) Presl showed efficacy in arresting aflatoxin B1 by the toxigenic strain. The growth of a toxigenic strain of A. flavus decreased progressively with increasing concentration of essential oil from leaves of C. camphora. The oil completely inhibited aflatoxin B1 production even at 750 ppm. Hence, the oil of C. camphora is recommended as herbal fungitoxicant against the fungal contamination of the raw materials.

Research paper thumbnail of Efficacy of chemically characterized Piper betle L. essential oil against fungal and aflatoxin contamination of some edible commodities and its antioxidant activity

International Journal of Food Microbiology, 2010

Research paper thumbnail of Assessment of Thymus vulgaris L. essential oil as a safe botanical preservative against post harvest fungal infestation of food commodities

Innovative Food Science & Emerging Technologies, 2008

Research paper thumbnail of Chemical composition, antifungal and antiaflatoxigenic activities of Ocimum sanctum L. essential oil and its safety assessment as plant based antimicrobial

Food and Chemical Toxicology, 2010

The study deals with the efficacy of Ocimum sanctum essential oil (EO) and its major component, e... more The study deals with the efficacy of Ocimum sanctum essential oil (EO) and its major component, eugenol against the fungi causing biodeterioration of food stuffs during storage. O. sanctum EO and eugenol were found efficacious in checking growth of Aspergillus flavus NKDHV8; and, their minimum inhibitory concentrations (MICs) were recorded as 0.3 and 0.2 microl ml(-1), respectively. The O. sanctum EO and eugenol also inhibited the aflatoxin B1 production completely at 0.2 and 0.1 microl ml(-1), respectively. Both of these were found superior over some prevalent synthetic antifungals and exhibited broad fungitoxic spectrum against 12 commonly occurring fungi. The LD50 value of O. sanctum EO on mice was found to be 4571.43 microl kg(-1) suggesting its non-mammalian toxic nature. The findings of present study reveals the possible exploitation of O. sanctum EO and eugenol as plant based safe preservatives against fungal spoilage of food stuffs during storage.

Research paper thumbnail of Chemical profile, antifungal, antiaflatoxigenic and antioxidant activity of Citrus maxima Burm. and Citrus sinensis (L.) Osbeck essential oils and their cyclic monoterpene, dl-limonene

Food and Chemical Toxicology, 2010

Research paper thumbnail of Exploitation of Natural Compounds in Eco-Friendly Management of Plant Pests

The intensive use of synthetic pesticides and their environmental and toxicological risks have ge... more The intensive use of synthetic pesticides and their environmental and toxicological risks have generated increased global interest to develop alternative sources of chemicals to be used in safe management of plant pests. Recently, in different parts of the world, attention has been paid towards exploitation of higher plant products as novel chemotherapeutics for plant protection because they are mostly non phytotoxic and easily biodegradable. Currently, different plant products have been formulated for large scale application as botanical pesticides in eco-friendly management of plant pests and are being used as alternatives to synthetic pesticides in crop protection. These products have low mammalian toxicity and are cost effective. Such products of higher plant origin may be exploited as eco-chemical and biorational approach in integrated plant protection programmes. The current status and future prospects of botanical pesticides in eco-friendly management of different plant pests are reviewed and discussed.

Research paper thumbnail of Prospects of botanical pesticides in sustainable agriculture

Sustainable agriculture aims at reducing the incidence of pests and diseases to such a degree tha... more Sustainable agriculture aims at reducing the incidence of pests and diseases to such a degree that they do not seriously damage crops without upsetting nature's balance. One of the aims of sustainable agriculture is to rediscover and develop strategies whose cost and ...

Research paper thumbnail of Essential Oil of Aegle marmelos as a Safe Plant-Based Antimicrobial Against Postharvest Microbial Infestations and Aflatoxin Contamination of Food Commodities

Journal of Food Science, 2009

ABSTRACT: The essential oil of Aegle marmelos L. Correa (Rutaceae) showed strong fungitoxicity a... more ABSTRACT: The essential oil of Aegle marmelos L. Correa (Rutaceae) showed strong fungitoxicity against some storage fungi-causing contamination of foodstuffs. The oil also showed efficacy as aflatoxin suppressor at 500 μL/L as it completely arrested the aflatoxin B1 production by the toxigenic strains (Navjot 4NSt and Saktiman 3NSt) of Aspergillus flavus Link. Keeping in view the side effects of synthetic fungicides, A. marmelos oil may be recommended as an antimicrobial of plant origin to enhance the shelf life of stored food commodities by controlling the fungal growth as well as aflatoxin secretion. This is the 1st report on aflatoxin B1 inhibitory nature of this oil. A. marmelos oil may be recommended as a novel plant-based antimicrobial in food protection over synthetic preservatives, most of which are reported to incite environmental problems because of their nonbiodegradable nature and side effects on mammals. The LD50 of Aegle oil was found to be 23659.93 mg/kg body weight in mice (Mus musculus L.) when administered for acute oral toxicity showing nonmammalian toxicity of the oil. GC-MS analysis of the oil found DL-Limonene to be major component.

Research paper thumbnail of A novel combination of the essential oils of Cinnamomum camphora and Alpinia galanga in checking aflatoxin B 1 production by a toxigenic strain of Aspergillus flavus

World Journal of Microbiology & Biotechnology, 2008

The growth of a toxigenic strain (Saktiman 3Nst) of Aspergillus flavus decreased progressively wi... more The growth of a toxigenic strain (Saktiman 3Nst) of Aspergillus flavus decreased progressively with increasing concentration of essential oils from leaves of Cinnamomum camphora and rhizome of Alpinia galanga incorporated into SMKY liquid medium. The oils significantly arrested aflatoxin B1 elaboration by A. flavus. The oil of C. camphora completely checked aflatoxin B1 elaboration at 750 ppm (mg/L) while that of A. galanga showed complete inhibition at 500 ppm only. The oil combination of C. camphora and A. galanga showed more efficacy than the individual oils showing complete inhibition of AFB1 production even at 250 ppm.

Research paper thumbnail of Assessment of Pelargonium graveolens oil as plant-based antimicrobial and aflatoxin suppressor in food preservation

Journal of The Science of Food and Agriculture, 2008

BACKGROUND: Contamination of stored food commodities by moulds and mycotoxins results in qualitat... more BACKGROUND: Contamination of stored food commodities by moulds and mycotoxins results in qualitative as well as quantitative losses. Most of the synthetic antimicrobials used for preservation of stored food items produce side effects in the form of residual and mammalian toxicity. Recently some higher plant products have been recommended as safe alternatives of such synthetic antimicrobials. In the present investigation antifungal efficacy of some essential oils was evaluated against two toxigenic strains of Aspergillus flavus with special reference to the oil of Pelargonium graveolens to investigate its potential to inhibit aflatoxin B1 secretion.RESULTS: Essential oil of P. graveolens exhibited absolute fungitoxicity against both the toxigenic strains of A. flavus. The minimum inhibitory concentration of the oil was found to be 0.75 g L−1 and exhibited a fungistatic nature. It was found superior over the synthetic fungicides tested and exhibited a broad fungitoxic spectrum. The oil showed excellent anti-aflatoxigenic efficacy as it completely inhibited aflatoxin B1 production even at 0.50 g L−1.CONCLUSION: This is the first report on the aflatoxin B1 inhibitory nature of P. graveolens oil. It may be recommended as a novel plant-based antimicrobial as well as aflatoxin B1 suppressor over synthetic preservatives in food protection. Copyright © 2008 Society of Chemical Industry

Research paper thumbnail of Angle-dependent XPS analysis of silicon nitride film deposited on screen-printed crystalline silicon solar cell

Solar Energy Materials and Solar Cells, 2009

Research paper thumbnail of Temperature dependence of I– V characteristics and performance parameters of silicon solar cell

Solar Energy Materials and Solar Cells, 2008

Research paper thumbnail of Biodeterioration of some herbal raw materials by storage fungi and aflatoxin and assessment of Cymbopogon flexuosus essential oil and its components as antifungal

International Biodeterioration & Biodegradation, 2009

Deterioration of raw materials of six medicinal plants viz. Terminalia arjuna, Acorus calamus, Ra... more Deterioration of raw materials of six medicinal plants viz. Terminalia arjuna, Acorus calamus, Rauvolfia serpentina, Holarrhena antidysenterica, Withania somnifera and Boerhaavia diffusa was examined. Some of the contaminated raw materials were found to be deteriorated by ...

Research paper thumbnail of Efficacy of Lippia alba (Mill.) N.E. Brown essential oil and its monoterpene aldehyde constituents against fungi isolated from some edible legume seeds and aflatoxin B 1 production

International Journal of Food Microbiology, 2009

Research paper thumbnail of Fungal Contamination of Raw Materials of Some Herbal Drugs and Recommendation of Cinnamomum camphora Oil as Herbal Fungitoxicant

Microbial Ecology, 2008

The paper explores fungal infection and aflatoxin B1 contamination of six medicinal plant samples... more The paper explores fungal infection and aflatoxin B1 contamination of six medicinal plant samples viz. Adhatoda vasica Nees, Asparagus racemosus Linn., Evolvulus alsinoides Linn., Glycyrrhiza glabra Linn., Plumbago zeylanica Linn. and Terminalia chebula Retz. A total of 858 fungal isolates were detected from the raw materials. Maximum number of fungal isolates was detected from A. racemosus (228). The genus Aspergillus was found to be the most dominant genus causing infection to most of the raw materials. Among the 32 isolates of A. flavus tested, 13 isolates were found to be toxigenic elaborating aflatoxin B1. The highest elaboration of aflatoxin B1 was 394.95 ppb by the isolates of A. flavus from G. glabra. The essential oil of Cinnamomum camphora (L.) Presl showed efficacy in arresting aflatoxin B1 by the toxigenic strain. The growth of a toxigenic strain of A. flavus decreased progressively with increasing concentration of essential oil from leaves of C. camphora. The oil completely inhibited aflatoxin B1 production even at 750 ppm. Hence, the oil of C. camphora is recommended as herbal fungitoxicant against the fungal contamination of the raw materials.

Research paper thumbnail of Efficacy of chemically characterized Piper betle L. essential oil against fungal and aflatoxin contamination of some edible commodities and its antioxidant activity

International Journal of Food Microbiology, 2010

Research paper thumbnail of Assessment of Thymus vulgaris L. essential oil as a safe botanical preservative against post harvest fungal infestation of food commodities

Innovative Food Science & Emerging Technologies, 2008

Research paper thumbnail of Chemical composition, antifungal and antiaflatoxigenic activities of Ocimum sanctum L. essential oil and its safety assessment as plant based antimicrobial

Food and Chemical Toxicology, 2010

The study deals with the efficacy of Ocimum sanctum essential oil (EO) and its major component, e... more The study deals with the efficacy of Ocimum sanctum essential oil (EO) and its major component, eugenol against the fungi causing biodeterioration of food stuffs during storage. O. sanctum EO and eugenol were found efficacious in checking growth of Aspergillus flavus NKDHV8; and, their minimum inhibitory concentrations (MICs) were recorded as 0.3 and 0.2 microl ml(-1), respectively. The O. sanctum EO and eugenol also inhibited the aflatoxin B1 production completely at 0.2 and 0.1 microl ml(-1), respectively. Both of these were found superior over some prevalent synthetic antifungals and exhibited broad fungitoxic spectrum against 12 commonly occurring fungi. The LD50 value of O. sanctum EO on mice was found to be 4571.43 microl kg(-1) suggesting its non-mammalian toxic nature. The findings of present study reveals the possible exploitation of O. sanctum EO and eugenol as plant based safe preservatives against fungal spoilage of food stuffs during storage.

Research paper thumbnail of Chemical profile, antifungal, antiaflatoxigenic and antioxidant activity of Citrus maxima Burm. and Citrus sinensis (L.) Osbeck essential oils and their cyclic monoterpene, dl-limonene

Food and Chemical Toxicology, 2010

Research paper thumbnail of Exploitation of Natural Compounds in Eco-Friendly Management of Plant Pests

The intensive use of synthetic pesticides and their environmental and toxicological risks have ge... more The intensive use of synthetic pesticides and their environmental and toxicological risks have generated increased global interest to develop alternative sources of chemicals to be used in safe management of plant pests. Recently, in different parts of the world, attention has been paid towards exploitation of higher plant products as novel chemotherapeutics for plant protection because they are mostly non phytotoxic and easily biodegradable. Currently, different plant products have been formulated for large scale application as botanical pesticides in eco-friendly management of plant pests and are being used as alternatives to synthetic pesticides in crop protection. These products have low mammalian toxicity and are cost effective. Such products of higher plant origin may be exploited as eco-chemical and biorational approach in integrated plant protection programmes. The current status and future prospects of botanical pesticides in eco-friendly management of different plant pests are reviewed and discussed.

Research paper thumbnail of Prospects of botanical pesticides in sustainable agriculture

Sustainable agriculture aims at reducing the incidence of pests and diseases to such a degree tha... more Sustainable agriculture aims at reducing the incidence of pests and diseases to such a degree that they do not seriously damage crops without upsetting nature's balance. One of the aims of sustainable agriculture is to rediscover and develop strategies whose cost and ...

Research paper thumbnail of Essential Oil of Aegle marmelos as a Safe Plant-Based Antimicrobial Against Postharvest Microbial Infestations and Aflatoxin Contamination of Food Commodities

Journal of Food Science, 2009

ABSTRACT: The essential oil of Aegle marmelos L. Correa (Rutaceae) showed strong fungitoxicity a... more ABSTRACT: The essential oil of Aegle marmelos L. Correa (Rutaceae) showed strong fungitoxicity against some storage fungi-causing contamination of foodstuffs. The oil also showed efficacy as aflatoxin suppressor at 500 μL/L as it completely arrested the aflatoxin B1 production by the toxigenic strains (Navjot 4NSt and Saktiman 3NSt) of Aspergillus flavus Link. Keeping in view the side effects of synthetic fungicides, A. marmelos oil may be recommended as an antimicrobial of plant origin to enhance the shelf life of stored food commodities by controlling the fungal growth as well as aflatoxin secretion. This is the 1st report on aflatoxin B1 inhibitory nature of this oil. A. marmelos oil may be recommended as a novel plant-based antimicrobial in food protection over synthetic preservatives, most of which are reported to incite environmental problems because of their nonbiodegradable nature and side effects on mammals. The LD50 of Aegle oil was found to be 23659.93 mg/kg body weight in mice (Mus musculus L.) when administered for acute oral toxicity showing nonmammalian toxicity of the oil. GC-MS analysis of the oil found DL-Limonene to be major component.

Research paper thumbnail of A novel combination of the essential oils of Cinnamomum camphora and Alpinia galanga in checking aflatoxin B 1 production by a toxigenic strain of Aspergillus flavus

World Journal of Microbiology & Biotechnology, 2008

The growth of a toxigenic strain (Saktiman 3Nst) of Aspergillus flavus decreased progressively wi... more The growth of a toxigenic strain (Saktiman 3Nst) of Aspergillus flavus decreased progressively with increasing concentration of essential oils from leaves of Cinnamomum camphora and rhizome of Alpinia galanga incorporated into SMKY liquid medium. The oils significantly arrested aflatoxin B1 elaboration by A. flavus. The oil of C. camphora completely checked aflatoxin B1 elaboration at 750 ppm (mg/L) while that of A. galanga showed complete inhibition at 500 ppm only. The oil combination of C. camphora and A. galanga showed more efficacy than the individual oils showing complete inhibition of AFB1 production even at 250 ppm.

Research paper thumbnail of Assessment of Pelargonium graveolens oil as plant-based antimicrobial and aflatoxin suppressor in food preservation

Journal of The Science of Food and Agriculture, 2008

BACKGROUND: Contamination of stored food commodities by moulds and mycotoxins results in qualitat... more BACKGROUND: Contamination of stored food commodities by moulds and mycotoxins results in qualitative as well as quantitative losses. Most of the synthetic antimicrobials used for preservation of stored food items produce side effects in the form of residual and mammalian toxicity. Recently some higher plant products have been recommended as safe alternatives of such synthetic antimicrobials. In the present investigation antifungal efficacy of some essential oils was evaluated against two toxigenic strains of Aspergillus flavus with special reference to the oil of Pelargonium graveolens to investigate its potential to inhibit aflatoxin B1 secretion.RESULTS: Essential oil of P. graveolens exhibited absolute fungitoxicity against both the toxigenic strains of A. flavus. The minimum inhibitory concentration of the oil was found to be 0.75 g L−1 and exhibited a fungistatic nature. It was found superior over the synthetic fungicides tested and exhibited a broad fungitoxic spectrum. The oil showed excellent anti-aflatoxigenic efficacy as it completely inhibited aflatoxin B1 production even at 0.50 g L−1.CONCLUSION: This is the first report on the aflatoxin B1 inhibitory nature of P. graveolens oil. It may be recommended as a novel plant-based antimicrobial as well as aflatoxin B1 suppressor over synthetic preservatives in food protection. Copyright © 2008 Society of Chemical Industry