B.H.S. Thimmappa | Alliance University (original) (raw)
Papers by B.H.S. Thimmappa
African Journal of Chemical Education, 2020
Beer is one of the favorite beverages produced by the fermentation of grains. The global producti... more Beer is one of the favorite beverages produced by the fermentation of grains. The global production figures indicate an increasing trend during the last decade. This article highlights the beer brewing process, chemistry concepts involved, and problems and prospects. The emphasis is on conceptual understanding of both theory and practice, and the chemical perspectives and possibilities to provide an appreciation of alcohol chemistry exposure in our daily lives that have particular significance and several positive effects to enrich the learning experience.
ChemInform, Aug 23, 2010
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Natural Science and Advanced Technology Education
The incorporation of nature’s design and development in the higher science education system and r... more The incorporation of nature’s design and development in the higher science education system and research practice is emphasized to foster improved awareness of foundational skills in molecular biology among learners. Multiple perspectives through the prism of global interest in molecular biology will have a huge ripple effect throughout the world of science while protecting the environment and preserving the ecosystem. Steps in the right and exciting directions could enhance the ability to carry out solution-focused and productive research activities on various topics in this interdisciplinary area and eventually result in new costeffective technologies, technology commercialization, and practical applications. It is clear that in the long run, the benefits of research practice will have a significant positive impact on society.
Polymer Testing, 2020
HDPE is a semi-crystalline thermoplastic polymer, with remarkable physical properties such as hig... more HDPE is a semi-crystalline thermoplastic polymer, with remarkable physical properties such as high chemical resistivity, high impact strength, and high modulus. Compared to the other semi-crystalline polymers, HDPE mostly possesses a high crystallinity, due to which, it exhibits a unique combination of mechanical and chemical resistance properties. In the present work, we have characterized the crystalline spherulites of neat and formulated HDPE compositions thoroughly characterized by different electron microscopy techniques such as scanning electron microscopy (SEM) and transmission electron microscopy (TEM). One of the critical steps to obtaining well-resolved SEM images is the sample preparation that typically involves the etching process to elucidate the crystalline spherulites. Though such traditional methodology can effectively be used for neat HDPE, it leads to the creation of undesirable experimental artifacts when used to investigate formulated HDPE compositions. An alternate TEM-based method provides clear images without any artifacts, apart from being a direct and green method and taking relatively a lesser measurement time.
Natural Science and Advanced Technology Education
This discussion paper on death presents an analysis of the causes of irretrievable mortality in t... more This discussion paper on death presents an analysis of the causes of irretrievable mortality in the Indian context. It traces the local-to-global connection by depicting the current scenario and future perspectives. It deals with various aspects of death to provide a broader overview and outlines the various actions required to improve it. Analysis of the mortality data illustrates the inadequacy of present efforts to address the problem of death due to avoidable causes. A better understanding of the relationship between a vast number of unnatural deaths and the personal safety and healthcare precautions as they are practiced will lead us to conclude that different activities performed with a better presence of mind can extend the span of human existence in general. Analyses through intensive scientific research and careful examination through cross-pollination of inspiring ideas, proper perspectives, and a positive orientation to imagine a better future will enable people to fulfil...
Journal of Composites Science
The combination of awareness of harmful industrial processes, environmental concerns, and depleti... more The combination of awareness of harmful industrial processes, environmental concerns, and depleting petroleum-based resources has spurred research in developing sustainable materials from renewable sources. Natural bio-based polymers have replaced synthetic polymers because of growing concern about environmental sustainability. As a result of heating and distilling cashew nutshell liquid (CNSL), cardanol has emerged as a promising bio-retrieved component that can be used to make bio-based epoxy. The current work intends to investigate the mechanical properties of three kinds of cardanol-based bio-based epoxies in anticipation of widespread use. Vickers hardness, tensile and flexural strength are used to characterize mechanical properties. Additionally, a water absorption test is carried out to examine the weight gain properties of all the bio-based epoxy variants selected. FormuLITE 2 (FormuLITE 2501A + FormuLITE 2401B) exhibited the highest Vickers hardness, tensile and flexural st...
Chemistry: A European Journal, 2013
The scope for learning subjects in our own way via flexible learning module is relevant in this a... more The scope for learning subjects in our own way via flexible learning module is relevant in this age of tablets to capture the excitement of science. The paradigm shift in globalized learning using multiple sources is reflected in the recent trends, practices and techniques among learners/facilitators changing the very nature of human relations and social life. The present situation of slightly lower academic performance from an educational perspective needs some specific and alternate methods to discuss a subject,impart knowledge, instill basic values and for well-rounded educational experience. The PowerPoint presentations, open source articles, lateral and supplementary learning materials,problem based learning, multimedia learning and miscellaneous methods discussed in this paper stir the imagination to influence the thoughts and deeds of the future generation and have implications on health, education and prosperity with the advantage of subject areas, supplementary reading mate...
Nature Environment and Pollution Technology, 2021
A method to capture and analyze aldehydes in either solution or gas samples on cotton fiber, acti... more A method to capture and analyze aldehydes in either solution or gas samples on cotton fiber, activated with O-benzyl hydroxylamine (OBA), is developed. The stability of the reagent activated cotton fiber (RACF) with and without capturing aldehydes was 17 days and 24 Hrs, respectively, qualifying the technique for field applications. Thus the aldehyde capturing can be done outside the lab using RACF in any closed environment and bring back to the lab for the quantitative analysis.. The analytical method is based on the gas chromatographic analysis of aldoxime formed between aldehydes and OBA on RACF. Optimized experimental conditions required 50 mg of RACF to capture aldehydes with a reaction time of 15 minutes. The technique detects aldehydes much below the permissible exposure limits of 25 ppm for acetaldehyde (CH3CHO) and 0.75 ppm for formaldehyde (HCHO). The method’s detection limits are 4 ppb of HCHO, 8 ppb of CH3CHO in the gas sample, and 1.5 ppb of HCHO, and 19 ppb of CH3CHO i...
Fundamental knowledge of biomedical science, engineering, and technology, including insights into... more Fundamental knowledge of biomedical science, engineering, and technology, including insights into the complex real world phenomena, into the mechanisms behind the working of the biological systems and modern devices, advanced biomaterials and a wide range of environmental influences, are expected to affect learners’ thought processes in a special way. Modern biomedical instruments provide data for disease forecasts. They monitor different stages of disease development from localized or regional spread to distant spread and during incubation, prodromal, illness, decline, and convalescence periods. This paper presents 150 multiple choice questions and answers relating to the biomedical field that eventually helps us to understand natural phenomena, biochemical concepts, principles and processes, design and development of modern medical devices, diagnostic tools, treatment techniques, advances in medication and constructive applications. The purpose is to generate curiosity among learn...
Chemistry: A European Journal, 2015
Interesting direct questions related to common science branches with a specialized knowledge is p... more Interesting direct questions related to common science branches with a specialized knowledge is presented as an additional learning material for the benefit of young minds with a spirit of inquiry. This questionnaire is a mix of the right technical words used to describe scientific fields and some specific logical analysis, designed to develop basic awareness, enrich scientific thinking process and enhance understanding of the true meaning of the terms used. The answers to this practice quiz of 162 diverse questions on scientific disciplines are listed at the end of the text. This is an attempt to awaken the natural curiosity of young minds and help in engraving the keywords used in describing the branches of science
This paper describes an application of a model with a happiness index for students of higher educ... more This paper describes an application of a model with a happiness index for students of higher education institutions that is calculated based on a combination of the customized PERMA profile and proposed SAC index. This profile application provides a quantifiable overall happiness index of the learners more accurately and help implement appropriate actions to improve the situation to have significant impact on happiness. Further, an attempt is made to present the results of a pilot survey conducted based on the proposed SAC Index
Chemistry: A European Journal, 2011
In this paper, interesting questions related to common instrument systems with a specialized appr... more In this paper, interesting questions related to common instrument systems with a specialized approach is presented as a supplementary study material for the benefit of young students who have the spirit of inquiry. This questionnaire is a mix of the right technical words and some specific logical analysis, designed to develop mental concentration, boost basic instrument awareness, enrich scientific thinking process and improve understanding of the true meaning of the terms used. The straight and universal answers to practice quiz of 126 selected instrument-centered questions each highlighting unique property measured using an instrument are listed at the end of the text. The momentum of change from traditional instruments to modern measuring and viewing instruments demonstrates the potential for different activities including high-technology research in several fields.
The telluro cluster Fe2Te2(CO)9 has been used as a starting block for the synthesis of a number o... more The telluro cluster Fe2Te2(CO)9 has been used as a starting block for the synthesis of a number of mixed metal complexes of the general form Fe2MTe2(CO)6 (PPh3)2, M = Pt, Pd, Ni, as well as a novel higher nuclearity telluro ruthenium cluster. The mechanism in a majority of the reactions of Fe2Te2(CO)9 involves the formation of the adduct Fe3Te2(CO)9L, L=CO, PPh3.The adduct readily undergoes substitution of the Fe(CO)3L fragment by incoming , new metal fragments. The reactive dinuclear molecule, Fe2Te2(CO)6 readily adds coordinatively unsaturated triosmium or triruthenium fragments to give the novel clusters , Fe2Os3Te2(CO)17 and Fe2Ru3Te2(CO)17. The activation of carbene ligands on Fe3Te2(CO)9 has been studied and the new bis methylidene complex, Fe2Te2(CO)6(CH2)2 has been prepared.
Reflux of solution of Fe 3 Te 2 (CO) 9 and Ru 3 (CO) 12 in benzene yields the cluster, Ru 4 Te 2 ... more Reflux of solution of Fe 3 Te 2 (CO) 9 and Ru 3 (CO) 12 in benzene yields the cluster, Ru 4 Te 2 (CO) 12 , which is the first example of a tetraruthenium cluster containing tellurium ligands. The cluster has been characterised by infrared spectroscopy, mass spectrometry, and microanalysis. The transmetallation reaction leading to the formation of Ru 4 Te 2 (CO) 12 is similar to that yielding the related molecule Co 4 Te 2 (CO) 11 from the reaction of Fe 3 Te 2 (CO) 9 and Co 2 (CO) 8 . The Ru 4 Te 2 (CO) 12 cluster may be compared to the pentaruthenium cluster Ru 5 S(CO) 15 if it is visualised as Ru 5 S(CO) 15 with the sulfido and the Ru(CO) 3 trans to it replaced by tellurium ligands.
African Journal of Chemical Education, 2020
Beer is one of the favorite beverages produced by the fermentation of grains. The global producti... more Beer is one of the favorite beverages produced by the fermentation of grains. The global production figures indicate an increasing trend during the last decade. This article highlights the beer brewing process, chemistry concepts involved, and problems and prospects. The emphasis is on conceptual understanding of both theory and practice, and the chemical perspectives and possibilities to provide an appreciation of alcohol chemistry exposure in our daily lives that have particular significance and several positive effects to enrich the learning experience.
ChemInform, Aug 23, 2010
ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance t... more ABSTRACT ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Natural Science and Advanced Technology Education
The incorporation of nature’s design and development in the higher science education system and r... more The incorporation of nature’s design and development in the higher science education system and research practice is emphasized to foster improved awareness of foundational skills in molecular biology among learners. Multiple perspectives through the prism of global interest in molecular biology will have a huge ripple effect throughout the world of science while protecting the environment and preserving the ecosystem. Steps in the right and exciting directions could enhance the ability to carry out solution-focused and productive research activities on various topics in this interdisciplinary area and eventually result in new costeffective technologies, technology commercialization, and practical applications. It is clear that in the long run, the benefits of research practice will have a significant positive impact on society.
Polymer Testing, 2020
HDPE is a semi-crystalline thermoplastic polymer, with remarkable physical properties such as hig... more HDPE is a semi-crystalline thermoplastic polymer, with remarkable physical properties such as high chemical resistivity, high impact strength, and high modulus. Compared to the other semi-crystalline polymers, HDPE mostly possesses a high crystallinity, due to which, it exhibits a unique combination of mechanical and chemical resistance properties. In the present work, we have characterized the crystalline spherulites of neat and formulated HDPE compositions thoroughly characterized by different electron microscopy techniques such as scanning electron microscopy (SEM) and transmission electron microscopy (TEM). One of the critical steps to obtaining well-resolved SEM images is the sample preparation that typically involves the etching process to elucidate the crystalline spherulites. Though such traditional methodology can effectively be used for neat HDPE, it leads to the creation of undesirable experimental artifacts when used to investigate formulated HDPE compositions. An alternate TEM-based method provides clear images without any artifacts, apart from being a direct and green method and taking relatively a lesser measurement time.
Natural Science and Advanced Technology Education
This discussion paper on death presents an analysis of the causes of irretrievable mortality in t... more This discussion paper on death presents an analysis of the causes of irretrievable mortality in the Indian context. It traces the local-to-global connection by depicting the current scenario and future perspectives. It deals with various aspects of death to provide a broader overview and outlines the various actions required to improve it. Analysis of the mortality data illustrates the inadequacy of present efforts to address the problem of death due to avoidable causes. A better understanding of the relationship between a vast number of unnatural deaths and the personal safety and healthcare precautions as they are practiced will lead us to conclude that different activities performed with a better presence of mind can extend the span of human existence in general. Analyses through intensive scientific research and careful examination through cross-pollination of inspiring ideas, proper perspectives, and a positive orientation to imagine a better future will enable people to fulfil...
Journal of Composites Science
The combination of awareness of harmful industrial processes, environmental concerns, and depleti... more The combination of awareness of harmful industrial processes, environmental concerns, and depleting petroleum-based resources has spurred research in developing sustainable materials from renewable sources. Natural bio-based polymers have replaced synthetic polymers because of growing concern about environmental sustainability. As a result of heating and distilling cashew nutshell liquid (CNSL), cardanol has emerged as a promising bio-retrieved component that can be used to make bio-based epoxy. The current work intends to investigate the mechanical properties of three kinds of cardanol-based bio-based epoxies in anticipation of widespread use. Vickers hardness, tensile and flexural strength are used to characterize mechanical properties. Additionally, a water absorption test is carried out to examine the weight gain properties of all the bio-based epoxy variants selected. FormuLITE 2 (FormuLITE 2501A + FormuLITE 2401B) exhibited the highest Vickers hardness, tensile and flexural st...
Chemistry: A European Journal, 2013
The scope for learning subjects in our own way via flexible learning module is relevant in this a... more The scope for learning subjects in our own way via flexible learning module is relevant in this age of tablets to capture the excitement of science. The paradigm shift in globalized learning using multiple sources is reflected in the recent trends, practices and techniques among learners/facilitators changing the very nature of human relations and social life. The present situation of slightly lower academic performance from an educational perspective needs some specific and alternate methods to discuss a subject,impart knowledge, instill basic values and for well-rounded educational experience. The PowerPoint presentations, open source articles, lateral and supplementary learning materials,problem based learning, multimedia learning and miscellaneous methods discussed in this paper stir the imagination to influence the thoughts and deeds of the future generation and have implications on health, education and prosperity with the advantage of subject areas, supplementary reading mate...
Nature Environment and Pollution Technology, 2021
A method to capture and analyze aldehydes in either solution or gas samples on cotton fiber, acti... more A method to capture and analyze aldehydes in either solution or gas samples on cotton fiber, activated with O-benzyl hydroxylamine (OBA), is developed. The stability of the reagent activated cotton fiber (RACF) with and without capturing aldehydes was 17 days and 24 Hrs, respectively, qualifying the technique for field applications. Thus the aldehyde capturing can be done outside the lab using RACF in any closed environment and bring back to the lab for the quantitative analysis.. The analytical method is based on the gas chromatographic analysis of aldoxime formed between aldehydes and OBA on RACF. Optimized experimental conditions required 50 mg of RACF to capture aldehydes with a reaction time of 15 minutes. The technique detects aldehydes much below the permissible exposure limits of 25 ppm for acetaldehyde (CH3CHO) and 0.75 ppm for formaldehyde (HCHO). The method’s detection limits are 4 ppb of HCHO, 8 ppb of CH3CHO in the gas sample, and 1.5 ppb of HCHO, and 19 ppb of CH3CHO i...
Fundamental knowledge of biomedical science, engineering, and technology, including insights into... more Fundamental knowledge of biomedical science, engineering, and technology, including insights into the complex real world phenomena, into the mechanisms behind the working of the biological systems and modern devices, advanced biomaterials and a wide range of environmental influences, are expected to affect learners’ thought processes in a special way. Modern biomedical instruments provide data for disease forecasts. They monitor different stages of disease development from localized or regional spread to distant spread and during incubation, prodromal, illness, decline, and convalescence periods. This paper presents 150 multiple choice questions and answers relating to the biomedical field that eventually helps us to understand natural phenomena, biochemical concepts, principles and processes, design and development of modern medical devices, diagnostic tools, treatment techniques, advances in medication and constructive applications. The purpose is to generate curiosity among learn...
Chemistry: A European Journal, 2015
Interesting direct questions related to common science branches with a specialized knowledge is p... more Interesting direct questions related to common science branches with a specialized knowledge is presented as an additional learning material for the benefit of young minds with a spirit of inquiry. This questionnaire is a mix of the right technical words used to describe scientific fields and some specific logical analysis, designed to develop basic awareness, enrich scientific thinking process and enhance understanding of the true meaning of the terms used. The answers to this practice quiz of 162 diverse questions on scientific disciplines are listed at the end of the text. This is an attempt to awaken the natural curiosity of young minds and help in engraving the keywords used in describing the branches of science
This paper describes an application of a model with a happiness index for students of higher educ... more This paper describes an application of a model with a happiness index for students of higher education institutions that is calculated based on a combination of the customized PERMA profile and proposed SAC index. This profile application provides a quantifiable overall happiness index of the learners more accurately and help implement appropriate actions to improve the situation to have significant impact on happiness. Further, an attempt is made to present the results of a pilot survey conducted based on the proposed SAC Index
Chemistry: A European Journal, 2011
In this paper, interesting questions related to common instrument systems with a specialized appr... more In this paper, interesting questions related to common instrument systems with a specialized approach is presented as a supplementary study material for the benefit of young students who have the spirit of inquiry. This questionnaire is a mix of the right technical words and some specific logical analysis, designed to develop mental concentration, boost basic instrument awareness, enrich scientific thinking process and improve understanding of the true meaning of the terms used. The straight and universal answers to practice quiz of 126 selected instrument-centered questions each highlighting unique property measured using an instrument are listed at the end of the text. The momentum of change from traditional instruments to modern measuring and viewing instruments demonstrates the potential for different activities including high-technology research in several fields.
The telluro cluster Fe2Te2(CO)9 has been used as a starting block for the synthesis of a number o... more The telluro cluster Fe2Te2(CO)9 has been used as a starting block for the synthesis of a number of mixed metal complexes of the general form Fe2MTe2(CO)6 (PPh3)2, M = Pt, Pd, Ni, as well as a novel higher nuclearity telluro ruthenium cluster. The mechanism in a majority of the reactions of Fe2Te2(CO)9 involves the formation of the adduct Fe3Te2(CO)9L, L=CO, PPh3.The adduct readily undergoes substitution of the Fe(CO)3L fragment by incoming , new metal fragments. The reactive dinuclear molecule, Fe2Te2(CO)6 readily adds coordinatively unsaturated triosmium or triruthenium fragments to give the novel clusters , Fe2Os3Te2(CO)17 and Fe2Ru3Te2(CO)17. The activation of carbene ligands on Fe3Te2(CO)9 has been studied and the new bis methylidene complex, Fe2Te2(CO)6(CH2)2 has been prepared.
Reflux of solution of Fe 3 Te 2 (CO) 9 and Ru 3 (CO) 12 in benzene yields the cluster, Ru 4 Te 2 ... more Reflux of solution of Fe 3 Te 2 (CO) 9 and Ru 3 (CO) 12 in benzene yields the cluster, Ru 4 Te 2 (CO) 12 , which is the first example of a tetraruthenium cluster containing tellurium ligands. The cluster has been characterised by infrared spectroscopy, mass spectrometry, and microanalysis. The transmetallation reaction leading to the formation of Ru 4 Te 2 (CO) 12 is similar to that yielding the related molecule Co 4 Te 2 (CO) 11 from the reaction of Fe 3 Te 2 (CO) 9 and Co 2 (CO) 8 . The Ru 4 Te 2 (CO) 12 cluster may be compared to the pentaruthenium cluster Ru 5 S(CO) 15 if it is visualised as Ru 5 S(CO) 15 with the sulfido and the Ru(CO) 3 trans to it replaced by tellurium ligands.