VIJAY KOTHARI (48 Ergebnisse)

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

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Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Exam Revision from the year 2015 in the subject Biology - General, Basics, Nirma University, language: English, abstract: This is a compilation of more than 100 multiple choice questions pertaining to different areas of biological sciences. This compilation is intended to be helpful to those who are preparing for appearing in any of the competitive examinations at various levels. Questions mainly are from the fields of Microbiology, Biochemistry, Biotechnology, Immunology, Biomedical Engineering, etc. All correct answers are put in bold face for immediate reference of the reader. Teachers may also find some questions from this compilation suitable for inclusion in various test papers.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Scientific Study from the year 2014 in the subject Biology - Micro- and Molecular Biology, grade: A, Nirma University (Institute of Science), course: M.Sc., language: English, abstract: Objective: To investigate the effect of (i) seed extracts of Pongamia pinnata, Pyrus pyrifolia, and Manilkara hexandra, (ii) bacterial pigment prodigiosin, and (iii) three organic solvents (ethanol, methanol, and DMSO), on quorum sensing (QS) in Chromobacterium violaceum.Methods: C. violaceum was challenged with plant extracts prepared by microwave assisted extraction (MAE) method, prodigiosin, and organic solvents. Effect of these test substances on C. violaceum growth, and quorum sensing regulated pigment (violacein) production was studied by broth dilution assay. High performance liquid chromatography (HPLC) was also applied to generate chromatographic fingerprint of the active extracts. Effect of sub-MIC level of the antibiotic streptomycin on quorum sensing regulated pigment production was also studied.Results: P. pinnata seed extracts and prodigiosin were found to possess anti-QS, and M. hexandra and P. pyrifolia seed extracts to possess QS-enhancing effect in C. violaceum. DMSO was found to enhance violacein production, whereas ethanol and methanol reduced violacein production in C. violaceum. Streptomycin at sub-MIC level was able to significantly arrest QS-regulated pigment production in C. violaceum and S. marcescens.Conclusion: Prodigiosin and the seed extracts used in this study could affect quorum sensing in C. violaceum to a notable extent. Results of this study also emphasizes the importance of inclusion of appropriate solvent controls (negative controls) in bioassays designed for screening of antimicrobial and/or anti-QS compounds. Antipathogenic potential of low concentrations of streptomycin was also demonstrated.

Taschenbuch. Zustand: Neu. Natural products as potential sources of inhibitors of bacterial quorum-sensing | Vijay Kothari (u. a.) | Taschenbuch | 36 S. | Englisch | 2015 | GRIN Verlag | EAN 9783656871217 | Verantwortliche Person für die EU: GRIN Publishing GmbH, Waltherstr. 23, 80337 München, info[at]grin[dot]com | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Scientific Study from the year 2013 in the subject Biology - Micro- and Molecular Biology, grade: A, Nirma University (Institute of Science), language: English, abstract: Hydrocarbon contamination of marine ecosystems has been a major environmental concern. Hydrocarbon metabolizing capacity of four halotolerant bacteria (Bacillus atrophaeus, Halomonas shengliensis, Halomonas koreensis, and Virgibacillus salarius) isolated from saline soil of Khambhat, India was investigated. Presence of catechol metabolizing enzymes (catechol 2,3 dioxygenase, chlorocatechol 1,2 dioxygenase, and protocatechuate 3,4 dioxygenase) was checked in V. salarius, as only this among all the test organisms could grow on the hydrocarbon substrates used, and compared with Pseudomonas oleovorans. Effect of salinity of the growth medium on activity of catechol metabolizing enzymes was also studied. Catechol 2,3 dioxygenase activity in both the organisms was more susceptible to increase in salinity of the growth medium than chlorocatechol 1,2-dioxygenase activity. To thebest of our awareness, this is the first report of catechol metabolism in V. salarius. V. salarius was found to be capable of weak biofilm formation. As V. salarius is capable of growing at high salt concentration, alkaline pH, hydrocarbon degradation, and also of growth in presence of various metal ions, it can be an attractive candidate for bioremediation of marine oil spills. Organisms like V. salarius can also serve as a model for multiple stress tolerance in prokaryotes.

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Taschenbuch. Zustand: Neu. Hydrocarbon Degradation Potential of Halotolerant Bacteria | Catechol Metabolizing Enzymes | Vijay Kothari (u. a.) | Taschenbuch | 64 S. | Englisch | 2014 | GRIN Verlag | EAN 9783656600121 | Verantwortliche Person für die EU: GRIN Publishing GmbH, Waltherstr. 23, 80337 München, info[at]grin[dot]com | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Scientific Study from the year 2014 in the subject Biology - Micro- and Molecular Biology, grade: A, Nirma University (Institute of Science), course: M.Sc., language: English, abstract: This study attempted at microwave mutagenesis of: (i) Lactobacillus plantarum for lactic acid overproduction, and (ii) Streptococcus mutans for reduced lactic acid production. Lactic acid is among the microbiological products with high market potential. Lactic acid is also an important virulence factor in formation of dental caries by S. mutans, as the acid produced by the bacteria leads to demineralisation of the teeth. Two of the mutants obtained (one from each organism) were able to maintain the altered lactic acid production till 10 generations. However the magnitude of alteration in lactic acid producing ability of the mutants went on decreasing over generations. The microwave effects observed in this study seem largely to be athermal in nature. Investigation of the mutants obtained at molecular level may result in identification of novel mutations responsible for altered lactic acid production. These mutations can then be introduced into a suitable organism either for better industrial production of lactic acid, or for constructing new probiotic strain(s) for possible application in maintenance of oral health.Effect of low power (90 W) microwave (2,450 MHz) radiation on bacterial growth and pigment production was studied in three different bacteria. Microwave exposure of 2-6 min duration was able to alter growth and pigment production (prodigiosin production by Serratia marcescens, violacein production by Chormobacterium violaceum, and staphyloxanthin production by Staphylococcus aureus) in the test organisms significantly. In this study, pigment production was estimated in the cell population originated from microwave treated inoculum, and not directly in the MW treated cells. Thus the alterations in pigment production and/or secretion might have been transferred from the originally MW treated cells to their daughter cells (who did not receive direct MW exposure), indicating the mutagenic influence of microwave radiation. Heavy prodigiosin overproduction observed in one of the test tubes inoculated with microwave treated S. marcescens could not be sustained by daughter populations corresponding to that tube, indicating the reversible nature of microwave induced mutation(s). The microwave effects observed in this study largely seem to be of athermal nature, as the thermal effect was minimized by use of ice during the microwave treatment.

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Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Scientific Study from the year 2012 in the subject Biology - Micro- and Molecular Biology, grade: A, Nirma University, course: M.Sc., language: English, abstract: This study aimed at investigating the effect of low power (90 W) microwave radiation (2450 MHz) on microbial growth, enzyme activity (protease and urease), and aflatoxin production. Thermal effect was avoided by keeping inoculum in ice while treating with microwave (for varying duration i.e. 2, 4, and 6 min). After 6 min MW treatment to S. aureus, its growth was stimulated over control by ~10%. Total protease activity in Aeromonas hydrophila witnessed a 33% decrease as compared to control after a microwave exposure of 2 min. Similar decrease of 24% in total protease activity of Candida albicans was observed after microwave exposure of 6 min. Staphylococcus aureus lost its urease activity completely after microwave treatment. Aflatoxin production was completely inhibited in Aspergillus parasiticus after microwave exposure of 2, 4, and 6 min. However, it required a 6 min microwave exposure for complete inhibition of aflatoxin production in Aspergillus flavus. Our results positively suggest existence of microwave specific non-thermal effect on microbial growth and metabolism.

Taschenbuch. Zustand: Neu. Neuware - Scientific Study from the year 2013 in the subject Biology - Micro- and Molecular Biology, grade: A, Nirma University (Institute of Science), language: English, abstract: Increasing applications of MW radiation has led to concerns globally due to the suspected bio effects associated with its exposure. Effect of MW, thermal and/or athermal, is inconclusive, complex, and controversial in literature. Thermal effect causes thermogenic effect while athermal effects are other than heat and such effects reported as somatic effect and/or genetic effect.This study basically deals with the athermal effects and is aimed at investigating the hypothesis that the exposure of microbial cells to MW (low power) may cause athermal effect, which affect on growth of microbes, enzyme activity, and production of exopolysaccharides. Furthermore, we have also checked the effect of different intracellular enzymes on MW treated bacteria. Our study also gives information that MW athermal effects causes changes at genetic level and can be passed on to next generation.There are numerous and increasing applications of MW energy and technology in the industries, in homes, in medical, research institutions etc., and there is greater awareness and concern of the public over the suspected potential health hazards associated with such exposures [ICNIRP Guidelines, 1998]. There is therefore, a need for deeper understanding of the bio-effects of exposure to this radiation. Due to the ease of handing them in laboratory, microorganisms can be conveniently used to study the effect of MW on living systems. Besides, employing mutagenic frequencies of MW radiation for microbial strain improvement can be of considerable industrial significance.Objectives:1. To investigate the effect of low power MW ona. Growthb. Extracellular enzyme (amylase and pectinase) activity in Bacillus subtilis, Streptococcus mutans and Pectobacterium carotovora.c. Exopolysaccharide (EPS) in S. mutans and Xanthomonas campestris.2. To study the effect of low power MW ona. Growthb. Protein synthesisc. Intracellular enzyme (Glucose-6-phosphatase and beta- galactosidase) activity3. To investigate mutagenic effect of MW on EPS production in X. campestris.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Scientific Study from the year 2012 in the subject Biology - Micro- and Molecular Biology, Nirma University (Institute of Science), language: English, abstract: Extracts of five different plant seeds- Syzygium cumini, Pheonix sylvestris, Manilkara zapota, Tamarindus indica, and Annona squamosa- prepared by Microwave Assisted Extraction (MAE) method were screened for their antimicrobial activity against certain phytopathogenic microorganisms. Ethanolic extract of S. cumini was found to possess highest average total activity against susceptible microbes. Total activity was found to have a positive correlation with the extraction efficiency. Methanolic extract of T. indica exerted bactericidal action against Agrobacterium tumefaciens and Pseudomonas syringae. Ethanolic extract of P. sylvestris was able to protect cabbage leaf against Xanthomonas campestris. Acetone extract of M. zapota was able to reduce aflatoxin production in Aspergillus parasiticus by 50 %. Curcumin proved bactericidal against X. campestris.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Scientific Study from the year 2013 in the subject Biology - Micro- and Molecular Biology, grade: A, Nirma University (Institute of Science), course: Microbiology, language: English, abstract: Extracts of Emblica officinalis seeds prepared by Microwave Assisted Extraction (MAE) method were evaluated for their antimicrobial property against planktonic form of certain human/plant pathogenic microbes. Additionally, seed extracts of E. officinalis, Tamarindus indica, Manilkara zapota, Phoenix sylvestris, Syzygium cumini, and selected phytocompounds were tested against multi-drug resistant Streptococcus mutans (a major pathogen associated with human dental caries) in its planktonic as well as biofilm form. Ability of these extracts to eradicate and kill S. mutans biofilm was investigated. E. officinalis extracts exerted bactericidal action against S. mutans, Pseudomonas aeruginosa, and Vibrio cholerae. Acetone extract of S. cumini, and curcumin were able to inhibit S. mutans at appreciably low concentrations of 50 µg/mL and 20 µg/mL respectively. T. indica and S. cumini seed extracts were able to kill 80% cells of S. mutans in biofilm, in the concentration range of 500-1000 µg/mL. These extracts were able to achieve 95% killing of S. mutans biofilm at concentrations ranging from 600-2000 µg/mL. Ability of the potent extracts to kill S. mutans biofilm did not seem to be much dependent on eradication of the biofilm. Extraction efficiency was found to have a good correlation with antibacterial activity.

Taschenbuch. Zustand: Neu. Altered production of organic acid and pigments by microbes under influence of microwave radiation | Microwave Mutagenesis | Vijay Kothari (u. a.) | Taschenbuch | 80 S. | Englisch | 2015 | GRIN Verlag | EAN 9783656871194 | Verantwortliche Person für die EU: GRIN Publishing GmbH, Waltherstr. 23, 80337 München, info[at]grin[dot]com | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Antimicrobial and Antioxidant Properties of Plant Products | Screening and fractionation of bioactive extracts | Vijay Kothari | Taschenbuch | 112 S. | Englisch | 2011 | LAP LAMBERT Academic Publishing | EAN 9783844319033 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Microwave Sterilization of Biological Media | A novel approach for better microbial growth | Vijay Kothari (u. a.) | Taschenbuch | 100 S. | Englisch | 2011 | LAP LAMBERT Academic Publishing | EAN 9783846536773 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Plant Products in Dental Health | Plant Extracts against Dental Biofilm | Vijay Kothari (u. a.) | Taschenbuch | 116 S. | Englisch | 2014 | GRIN Verlag | EAN 9783656591016 | Verantwortliche Person für die EU: GRIN Publishing GmbH, Waltherstr. 23, 80337 München, info[at]grin[dot]com | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Biological effects of radiofrequency | Influence of sub lethal microwave radiation on bacterial growth, enzyme activity, and exopolysaccharide production | Vijay Kothari (u. a.) | Taschenbuch | 88 S. | Englisch | 2014 | GRIN Verlag | EAN 9783656608608 | Verantwortliche Person für die EU: GRIN Publishing GmbH, Waltherstr. 23, 80337 München, info[at]grin[dot]com | Anbieter: preigu.

Paperback. Zustand: Brand New. 164 pages. 8.66x5.91x0.37 inches. In Stock.

Taschenbuch. Zustand: Neu. Neuware -Scientific Study from the year 2013 in the subject Biology - Micro- and Molecular Biology, grade: A, Nirma University (Institute of Science), language: English, abstract: Increasing applications of MW radiation has led to concerns globally due to the suspected bio effects associated with its exposure. Effect of MW, thermal and/or athermal, is inconclusive, complex, and controversial in literature. Thermal effect causes thermogenic effect while athermal effects are other than heat and such effects reported as somatic effect and/or genetic effect.This study basically deals with the athermal effects and is aimed at investigating the hypothesis that the exposure of microbial cells to MW (low power) may cause athermal effect, which affect on growth of microbes, enzyme activity, and production of exopolysaccharides. Furthermore, we have also checked the effect of different intracellular enzymes on MW treated bacteria. Our study also gives information that MW athermal effects causes changes at genetic level and can be passed on to next generation.There are numerous and increasing applications of MW energy and technology in the industries, in homes, in medical, research institutions etc., and there is greater awareness and concern of the public over the suspected potential health hazards associated with such exposures [ICNIRP Guidelines, 1998]. There is therefore, a need for deeper understanding of the bio-effects of exposure to this radiation. Due to the ease of handing them in laboratory, microorganisms can be conveniently used to study the effect of MW on living systems. Besides, employing mutagenic frequencies of MW radiation for microbial strain improvement can be of considerable industrial significance.Objectives:1. To investigate the effect of low power MW ona. Growthb. Extracellular enzyme (amylase and pectinase) activity in Bacillus subtilis, Streptococcus mutans and Pectobacterium carotovora.c. Exopolysaccharide (EPS) in S. mutans and Xanthomonas campestris.2. To study the effect of low power MW ona. Growthb. Protein synthesisc. Intracellular enzyme (Glucose-6-phosphatase and ¿- galactosidase) activity3. To investigate mutagenic effect of MW on EPS production in X. campestris. 88 pp. Englisch.

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Hardcover. Zustand: Brand New. 1st edition. 512 pages. 9.25x6.25x1.25 inches. In Stock.

Zustand: Hervorragend. Zustand: Hervorragend | Seiten: 704 | Sprache: Englisch | Produktart: Bücher | This book presents the latest knowledge on both the physiological and the microbiological aspects of wound healing. Fresh insights into the process of cutaneous wound healing are described, which involves tissue regeneration and repair processes consisting of a sequence of molecular and cellular events. The management of infected wounds is then discussed in detail, covering the roles of traditional medicine practices, novel anti-infective formulations, non-antibiotic approaches, and probiotic bacteria. A section devoted to the interdisciplinary approach to wound care addresses topics including in vitro and in vivo research models, the development of advanced wound dressings, tissue engineering, and the potential applications of bioscaffolds. The authors are all leading researchers in the field. This book is an attempt to showcase current research status and future directions in the area of wound-healing research, which must be of interest to a large group ofreaders and researchers interested in this field.

Zustand: New. In.

Zustand: New. In.

Taschenbuch. Zustand: Neu. Microbial Products for Health and Nutrition | Vijay Kothari (u. a.) | Taschenbuch | xii | Englisch | 2025 | Springer | EAN 9789819742370 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Wound Healing Research | Current Trends and Future Directions | Prasun Kumar (u. a.) | Taschenbuch | x | Englisch | 2022 | Springer | EAN 9789811626791 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - This book highlights microbial products and their applications in the health sector. The chapters introduce novel advancements and applications in different pharmaceutical and nutraceutical aspects of applied microbiology. Readers will obtain a detailed overview of the relevance of microbial metabolites to human health and nutrition. Besides knowing the products already developed, they will also get an idea of microbial products currently in the development pipeline and those that are likely to emerge as potential nutraceuticals. Readers will get an interesting and useful perspective on how supplementing food with microbes or their bioactive metabolites can realize the idea of 'food as medicine'. This book introduces the biological activities of various microbial fermentation products, and how they are relevant to mitigating various disease conditions (e.g. neuropathy, diabetes, gut dysbiosis, malnutrition, etc.) in humans. One of the highlights of this volume is the exploration of microbial pigments as potential substitutes for synthetic colorants, offering safer and more sustainable alternatives for the food and healthcare industries. The book has equivalent contributions from experts in academia and industry to fill the communication gap between them. Through this book, readers will gain valuable insights into the historical perspectives, contemporary impacts, and future prospects of microbial applications in health and nutrition. From food preservation to biopharmaceutical production, the potential of microbial products to revolutionize our approach to health and wellness is undeniable.