für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Explosion of human population in the last few decades has lead to the fast reduction of land based resources. Indiscriminate dumping of wastages in the marine environment led to dreadful changes in natural resources of the coastal zone ecosystem. Researchers have concentrated their activities on studying the microbes linked with public health.Most new infections are not caused by truly new pathogens but are microorganisms that find a new way to enter a susceptible host and are newly recognized because of recently developed, sensitive techniques.Though the importance of pathogenic bacteria especially Vibrio cholerae in tropical water has been realized.so a through investigation on the incidental occurrence and distribution of Vibrio sp. was carried from Rameswram island (Palk Bay)South East coast of India. ····· 103613662
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Microbial activity can have an important impact on the durability of building materials. The harmful effects by the colonisting of micro-organism on the monuments is scientifically known as biodeterioration. Biodeterioration of ancient buildings and monuments depend upon many factors. Preservation of these monuments is very necessary. Although many studies on microorganism and deterioration have been published in recent years, books and congress proceedings focus mainly on prokaryotes and algae. Therefore, it is the aim of this book to summarize data on the fungal impact on biodeterioration processes. The aim of this work was to study the microfungi community on biodeteriorated samples originating from some historical buildings/tempels by using cultivation and microscope observations in order to evaluate the potential damage caused by fungal species. Most part of the book describes biodeterioration by fungi. This book especially emphasizes the frequency & contribution of fungi in biodeteriorated parts. The book is intended for archeologists, enginners, researchers, and students of environment science. ····· 103613657
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Baker s yeast is a key baking ingredient and this fascinating food starter has a long history. It was used to raise bread in Egypt from 4000 BC. Its massive introduction in the 19th century, baker s yeast certainly had a major impact on bread making technology. It is still one of the most important fermentation products based on volume of sales and its use for bread-making which considered as a staple food for large section of world s population. There is an increasing demand for such product - baker s yeast - in order to satisfy the needs of over growing population. This necessitates that should be made to ensure their hygienic suitability. This study was, therefore, executed to monitor the microbial content of baker s yeast taken from retail markets in an attempt to gain some insight into potential microbial related problems associated with these products. Hence, the yeast used must be fully active with a high viable cell count, determining the yeast cell count and the viability were carried out. The last part of this study dealt with the main factors affecting the production of baker s yeast in molasses medium in order to determine the optimum conditions for yeast production. ····· 103613653
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Biodiesel is an alternative source of energy, which is in high demand. Glycerol is the main by-product of biodiesel production (up to 10%) via the transesterification of vegetable oils and animal fats. Increased scientific and commercial interest in the development of viable biorefining strategies to convert renewable raw materials into biofuels, platform chemicals and biodegradable plastics is driven by environmental concerns, depleting petroleum resources and public awareness. This has drawn attention among the scientists towards the importance of finding new applications for this by-product in order to make biodiesel become a truly sustainable fuel. The project focuses on glycerol dehydrogenase, a key enzyme for the effective utilization of glycerol. This work was carried out in the Institute of Technical Microbiology (TUHH) under the supervision of Prof.Dr.Antranikian. ····· 103613607
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The study aims to determine the bacteriological quality and antibiotic resistivity pattern of bacterial isolates in sachet water sold on the street of Cape Coast Metropolis, one of the areas with perennial water shortage forcing inhabitants to depend on sachet water as a source of drinking water. Fifteen (15) different sachet water brands were collected from different vendors. A volume of each sample was added to an equal volume of bacteriological peptone water, incubated for 24hrs at 370C and sub-cultured onto Plate count agar (PCA) for bacteria colony count after isolated colonies were sub-cultured Blood and MacConkey agar. Isolated bacteria were indentified using appropriate biochemical tests. All the sachet water brands had viable counts on the PCA. Identification tests discovered that all the samples were contaminated with different bacterial isolates which include Bacillus cereus, Coagulase negative staphylococcus, Citrobacter spp., Escherichia coli, Enterococcus faecalis, Listeria monocytogenes, Proteus spp., Providencia spp., Pseudomonas aeruginosa. However there was no growth in the bottled water.The results indicate poor bacteriological quality of sachet water. ····· 103613604
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The convergent distribution of the Human Immunodeficiency Virus (HIV) and helminth infections has led to the suggestion that infection with helminths exacerbates the HIV epidemic in developing countries. A large body of suggestive evidence in support of this hypothesis has been accumulated in many countries over the past two decades. Although 57% of the South African population lives in poverty and carry the highest burden of both HIV and helmith infection, the disease interactions are under-researched in South Africa. This book details work undertaken in Khayelitsha, an informal settlement in the Western Cape Province of South Africa, where both HIV and intestinal helminth infections are highly prevalent. The immune profile of adults who are either singly-or dually- infected with HIV and Ascaris lumbricoides and/or Trichuris trichuria, plus non-infected HIV negative controls, is described in relation to the ability to control HIV infection. Four different phenotypes that respond differently to helminth infection are described and immunological profile related to HIV pathogenesis analysed. ····· 103613490
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Diarrhoeal disease is a major health problem throughout the world, and is responsible for high morbidity and mortality mainly among children and especially in developing countries like Nepal. This cross-sectional prospective study was designed to determine the incidence of Cholera, Shigellosis and Salmonellosis along with screening of the possible extended spectrum -lactamase producer among multi-drug resistant isolates from 268 diarrhoeal patients visiting different hospitals of Kathmandu valley and 5 other districts of Nepal in the period of April 2010 to January 2011. The specimens were processed by standard microbiological methods and confirmed with serology. Bacteria have been found as one of the common causes of diarrhoea and Cholera as one of the major reasons of diarrhoea. This study indicates a continuing need for resistance surveillance and rational use of antimicrobial agents to reduce the multi-drug resistance. ····· 103613437
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Archaea, the third domain of Life, were long thought to live only in extreme habitats, such as hot springs, deep sea hydrothermal vents, and brines. During the last two decades specific archaeal lineages have been found to be wide spread in many `normal` and cold environments, and to be responsible for important parts of the elemental cycles, such as ammonia oxidation and carbon fixation. A certain group of the `non-extreme` archaea, the group I.1c Crenarchaeota, now belonging to the Thaumarchaeota, were shown to prefer acidic boreal forest soil environments and have only rarely been found in other environments. These archaea appear to be especially associated with the roots of boreal forest trees and the ectomycorrhizal fungi that inhabit these boreal forest tree roots. These habitats were also shown to be colonised by uncultured archaea most closely affiliating with hyperhalophilic Halobacteria and with both acetoclastic and methylotrophic methanogens. The ecological role of these archaea is not yet known. However, the tree and fungal species have an impact on the archaeal communities. The striving to reveal the ecological roles of these archaea is still ongoing. ····· 103613414
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Monograph on Production, Optimization and Significance of the versatile Polysaccharide - Dextran provides a comprehensive study of the polysaccharide - Dextran which has enormous utility in the areas of medicine,food industry and environmental applications. It covers basics such as the isolation, characterization, confirmation of the organism Leuconstoc mesenteroides and about its polysaccharide product the structure, types,significance and the optimization of various factors for its maximum production. The style, sequence and the presentation of the material in this book would be useful for students, scholars and researchers to understand the underlying facts, about the concepts, significance and the numerous benefits of microbial products in the field of industrial microbiology and biotechnology. ····· 103613374
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Cowpea and pigeon pea are species of legumes grown locally in Sudan and they are available all over the year. They are cheap, good sources of protein, carbohydrates and minerals. The flours of cowpea and pigeon pea are good sources of protein, carbohydrates and minerals, so they can be used in the preparation of different types of culture media for the isolation of different species of bacteria and Candida albicans as shown in this study. The best result revealed by the combination in the isolation of the enterobacteriaceae which is comparable to the media in general use. ····· 103613339
für 49.41€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Fossil fuel depletion, increase in oil prices and adverse environmental effects of petroleum products have lead to sharp interest in biofuel production all over the world. The production of bioethanol from lignocellulosic biomass is a sustainable and attractive energy source for transportation fuel to replace gasoline and substitute fossil fuels. Office papers due to high cellulose and carbohydrate content are potential raw materials for production of bioethanol. Termites feed on diet rich in hemicellulose, cellulose and lignin and harbour a natural mechanism which makes them able to degrade cellulose. The mechanism of cellulose degradation is aided by the various cellulolytic bacteria that are found in the gut of termites. A technology that can give an everlasting solution to the energy requirements and reduce dependence on oil producing countries is the utilization of cellulose for the production of alternate and renewable fuels for transportation. This study is not only cost effective but also environmentally beneficial due to bioremediation of urban waste. ····· 103613222
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Enterococcus faecalis strains are becoming increasingly important agents of human disease, largely because of their resistance to antimicrobial agents. Because of their resistance to penicillins and cephalosporins of several activity ranges, the acquisition of high-level resistance to aminoglycosides, and now the emergence of vancomycin resistance, these bacteria are often involved in serious infections among patients receiving broad-spectrum antimicrobial chemotherapy.In Iraq, little information regarding vancomycin resistance and virulence factors presented in E. faecalis strains. Therefore, there is an increasing request to investigate the role of these strains in hospital infections.This bookprovides a new dataon the prevalence of E. faecalis in patients with significant bacteriuria, the antimicrobial resistance patterns and the presence of virulence genes in the isolated species. ····· 103613171
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The incidence of dermatomycoses has risen dramatically all over the world. Athlete s foot is common and difficult to treat and if untreated, may lead to bacterial infection of the lower leg skin (cellulites). These fungus diseases are clinically termed as the Tineas or Dermatomycoses. Ringworm infections of skin are most prominent and remain a common clinical problem despite the availability of several antimycotic drugs. These synthetic agents are non biodegradable and cause adhesive effects and residual toxicity. Therefore, keeping this fact in mind, the study have been carried out to isolate novel antifungal antibiotic producing bacteria. In the course of screening programme, a Bacillus subtilis MTCC-8114 was isolated, which showed activity against Microsporum fulvum & Trichophyton mentagrophytes. The antibiotic was characterized as peptide antifungal antibiotic and also found stable at different physiological conditions (temperature, pH, incubation period, aeration & non-aeration). The biotechnological potential of B. subtilis is noteworthy and may be used as biological control agent against pathogenic fungi or as food additive. ····· 103613169
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Biosurfactants in the recent past have become an important product of biotechnology for industrial and medical applications. The aim was to isolate biosurfactant producing organism from oil spilled soil sample. Six soil samples were collected in and around Bangalore.The microorganisms were isolated and screened for efficient biosurfactant producers and different physico-chemical tests for characterization of biosurfactants were done. Pseudomonas aeruginosa PAVIJ and Bacillus subtilis BSVIJ were producing maximum biosurfactants when grown on four different carbon sources namely palm, castrol, coconut and honge oils of different concentrations.The HPLC studies confirmed and quantified the different types of rhamnolipids Rha-Rha-C10-C10 and Rha-C10-C10 produced from Pseudomonas and Bacillus produced surfactin which were confirmed through standards. The study concludes that palm oil and castrol oil at 2% concentration seems to be the best carbon source for biosurfactant production and the two organisms isolated Pseudomonas PAVIJ and Bacillus BSVIJ are very much potent to produce rhamnolipid and surfactin biosurfactants which are antioxidant and antimicrobial in nature. ····· 103613156
für 32.31€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Las bacterias presentes en la rizósfera se encuentran interactuando con numerosos microorganismos (competidores y depredadores), lo cual favorece la evolución de mecanismos de competencia y resistencia a la depredación, como la liberación de metabolitos bioactivos. Pseudomonas fluorescens CHA0 es una bacteria conocida por ser capaz de producir una amplia variedad de estos metabolitos entre los que podemos mencionar el 2,4-diacetilfloroglucinol (DAPG), la pioluteorina (PLT), el cianuro de hidrogeno (HCN), así como los ácidos glucónico y 2-cetoglucónico, producidos por la vía de oxidación directa de la glucosa (VODG). Al ser excretados estos ácidos acidifican el entorno extracelular, disuelven fosfatos inorgánicos del suelo e inhiben el crecimiento de otras bacterias y hongos fitopatógenos. Nuestro objetivo fue determinar si la producción y posterior excreción de ácido glucónico constituye un mecanismo de defensa bacteriano alternativo ante la depredación por protozoarios, permitiendo así conocer un poco más acerca de su papel en diversos procesos que tienen lugar en la rizósfera y descifrar parte de las complejas redes que conectan a los microorganismos presentes en ella. ····· 103613132
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En el presente trabajo se describió y desarrolló el proceso de validación de la valoración microbiológica de antibióticos en cilindro-placa (difusión en agar), para la determinación cuantitativa de Bacitracina Zinc al 15% y Bacitracina Metilen Disalicilato al 11%, que incluye los requisitos exigidos en la determinación de parámetros analíticos de linealidad del sistema, linealidad del método, especificidad, exactitud, selectividad, límite de detección, límite de cuantificación y la precisión expresada en sus dos formas: repetibilidad y reproducibilidad. ····· 103612850
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Durante el pasado siglo, los biorreactores de lodos activados para el tratamiento de aguas residuales fueron desarrollados como meros sistemas de ingeniería, menospreciando la importancia de las bacterias que habitan los reactores de tratamiento y que son, en esencia, el motor de estos sistemas. Numerosos estudios han intentado entender la ecología de estas dinámicas comunidades bacterianas. Sin embargo, no ha sido si no hasta la última década que el desarrollo y aplicación de técnicas microbiológicas moleculares y métodos estadísticos avanzados ha facilitado un mejor entendimiento de estos complejos hábitats microbianos. Este estudio molecular se enfocó en entender cómo cambian a través del tiempo y el espacio las comunidades bacterianas en estos sistemas, cómo esos cambios afectan la eficiencia del tratamiento y cómo factores operacionales y ambientales pueden influenciar la función microbiológica de los biorreactores. De Ingenieros Sanitarios, a Microbiólogos, hasta oficiales gubernamentales, una amplia gama de profesionales pueden beneficiarse de este trabajo ya que enfatiza la relevancia de las bacterias en el diseño y manejo adecuados de sistemas biológicos de tratamiento. ····· 103612567
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La emergencia y diseminación de bacterias resistentes a los antibióticos es un gran problema actual de salud pública en todo el mundo. Las infecciones causadas por bacterias multiresistentes a los antibióticos presentan diariamente grandes desafíos a profesionales sanitarios especializados en enfermedades infecciosas y a sus pacientes en todo el mundo. La localización de genes de resistencia específicos en elementos genéticos móviles como plásmidos, transposones o genes cassettes en integrones, hace posible la transmisión de la resistencia entre bacterias que incluso pueden pertenecer a géneros o especies diferentes, y ha creado un reservorio de genes de resistencia. El diagnóstico rápido y la vigilancia de la resistencia son las herramientas más valiosas para prevenir la diseminación de la resistencia. Conocer y profundizar en el entendimiento de los mecanismos de resistencia antibiótica que han desarrollado las bacterias nos ayudará a desarrollar mejores estrategias terapéuticas para el tratamiento de enfermedades infecciosas y para el desarrollo de políticas de uso de antibióticos que favorezcan un mejor control de la resistencia antibiótica. ····· 103612285
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La Arqueología Microbiana es una nueva herramienta científica que permite comprender los aspectos ocultos de la historia humana. Los antiguos pueblos en todo el mundo utilizaron recipientes para fermentar sus bebidas ceremoniales, lo que dejó rastros biológicos, representados por los microorganismos que intervinieron en esas fermentaciones. Ahora, con las técnicas desarrolladas por el autor de esta obra, es posible restaurar, rehidratar y activar el metabolismo de antiguos microbios en estado de dormancia. En otras palabras, volverlos a la vida para que nos cuenten la historia desde una perspectiva única y fascinante: los sabores del pasado, la microflora de ambientes ya perdidos es decir, la historia contada por los microorganismos como las levaduras que fueron domesticadas por antiguos pueblos. A través de la recuperación de estos diminutos seres y mediante el estudio de su ADN, se ha podido comprender diversos aspectos culturales, históricos, ecológicos, higiénicos, tecnológicos y sociales de los habitantes de la planicie de Quito, en la era pre y post colombina. Se ha podido develar 2000 años de fermentaciones en Quito. ····· 103612178
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Fasciola hepatica es un helminto, trematodes, ampliamente distribuido en el mundo afectando fundamentalmente a ovinos, bovinos, camelidos, y eventualmente al hombre. La interacción de los productos de excreción-secreción (PES) de F. hepatica con células de la inmunidad innata, tales como los macrófagos, es fundamental durante etapas tempranas de la infección. En este trabajo observamos que los PES de F. hepatica son capaces de inducir efectos inmunomodulatorios en macrófagos peritoneales provenientes de ratones BALB/c tanto in vitro como in vivo, siendo estos efectos mediados por el receptor de Manosa y Dectin- 1. Los resultados obtenidos indicarían que los productos de F. hepatica modulan la función de macrófagos peritoneales, afectando la activación de estas células, lo cual resulta fundamental para extender la sobrevida y diseminación de este helminto en el hospedador. ····· 103612153
für 44.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En este trabajo se evaluó la utilización de cultivos mixotróficos de diferentes especies de microalgas: Grammatophora sp., Schizochytrium sp., Chaetoceros muelleri y una cepa de bacterias ácido lácticas (aislada de tracto digestivo de camarón) en la formación de bioflocs. Para determinar el efecto de la interacción microalga-probiótico en el crecimiento del cultivo, fueron sembradas las microalgas y probiótico. En ésta etapa se evaluaron los cultivos mediante la adición de una fuente de carbono (melaza) a una concentración de 2 g/m3 de agua cada 4 días, se evaluó el crecimiento de cultivos, la concentración de oxígeno disuelto, formación de bioflocs volumen ocupado por biofloc en 200 mL de cultivo (V:V) y presencia de Vibrio spp. En este trabajo se obtuvo que bajo estas condiciones, a partir del día cuatro de cultivo se presentó la formación de biofloc, generándose la mayor cantidad en el tratamiento a base de Schizochytrium sp. + Probiótico + melaza, con 1.25mL bioflocs/200 mL cultivo. Con estos resultados se propone un sistema biofloc a base de Schizochytrium sp. + Probiótico + Melaza, que puede ser evaluado para el cultivo de especies marinas. ····· 103611991
für 62.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El estudio de la calidad microbiológica de los embutidos poco ácidos se realizó mediante la caracterización de las comunidades microbianas más importantes en estos productos. Se identificaron a nivel de especie los aislados de bacterias del ácido láctico (BAL), de enterococos y de cocos gram-positivos catalasa-positivos (CGC+) utilizando técnicas de PCR y secuenciación de genes constitutivos. Posteriormente se realizó una tipificación molecular de los mismos mediante RAPD y análisis del perfil plasmídico y se estudiaron las principales características de interés higiénico-sanitario y tecnológico de las cepas. Entre las BAL, Lactobacillus sakei fue la especie predominante (74%). La actividad aminoácido-descarboxilasa se asoció a la especie L. curvatus. Enterococcus faecium fue la especie de enterococos predominante (51,9%) seguida por Enterococcus faecalis (14,2%). Todas las cepas de E. faecalis presentaron genes asociados a factores de virulencia. La identificación de los aislados de CGC+ demostró que Staphylococcus xylosus es la especie predominante (80,8%) en este tipo de embutidos. ····· 103611810
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La reutilización del agua residual se ha convertido en una práctica muy extendida en muchas partes del mundo, especialmente en países áridos o semiáridos donde la escasez de agua es un problema acuciante. Este hecho ha provocado un incremento de la probabilidad de infección de la población que entra en contacto directa o indirectamente con este agua debido a la presencia de microorganismos patógenos. Depurar este agua residual, es por tanto, una prioridad, no sólo desde un punto de vista sanitario o de salud pública sino también económico. En este libro se analizan los principales mecanismos de eliminación y/o inactivación de patógenos que tienen lugar en los sistemas de tratamiento de agua residual del noroeste de España (lagunajes, humedales artificiales y fangos activados) prestando especial atención al efecto que pueden tener diferentes factores ambientales sobre dicha inactivación. ····· 103611653
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El uso de agroquímicos ha permitido obtener incrementos sustanciales en la producción agrícola no obstante, sus efectos adversos están impactando de manera significativa la sostenibilidad de la agricultura. En la región del Valle del Mezquital, Hidalgo, México, se han efectuado estudios aislados respecto a la actividad microbiana total y al efecto de las aguas residuales sobre el género Rhizobium, pero no existen reportes respecto a otros microorganismos promotores del desarrollo vegetal (PGPR por sus siglas en inglés) como fijadores de nitrógeno de vida libre, solubilizadores de fósforo, productores de fitohormonas o de sideróforos, los cuales establecen interacciones de tipo benéfico con las plantas, por lo que muchas de ellas se utilizan en la biofertilización. Esta última, intenta reducir la aplicación de agroquímicos en el cultivo de jitomate (Lycopersicon esculentum). ····· 103611588· 1 · ::::: · 17 ·· 18 ·· 19 ·· 20 ·· 21 ·· 22 ·· 23 · ::::: · 24 ·
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