TR-00-04 - Svensk Kärnbränslehantering AB
... in an attempt to find an answer to this question. Microorganisms were found in all of the Maqarin groundwater but it could not be conclusively demonstrated that they are viable and growing in situ, rather than just being transported there from neutral groundwater. The diversity of the microorganisms ...
... in an attempt to find an answer to this question. Microorganisms were found in all of the Maqarin groundwater but it could not be conclusively demonstrated that they are viable and growing in situ, rather than just being transported there from neutral groundwater. The diversity of the microorganisms ...
The Roles of Serum and Carbon Dioxide in Capsule Formation by
... incubated in 10-20% CO,, isolated colonies were so mucoid that they coalesced and the confluent growth sometimes poured into the lid of the plate. It seemed very improbable that charcoal contributed a stimulating factor, since either of two brands were active (Norit A or Hopkin and Williams), whethe ...
... incubated in 10-20% CO,, isolated colonies were so mucoid that they coalesced and the confluent growth sometimes poured into the lid of the plate. It seemed very improbable that charcoal contributed a stimulating factor, since either of two brands were active (Norit A or Hopkin and Williams), whethe ...
Practical Microbiology
... number of microbial cells that cause an acute infection in humans. E.g. certain Vibrio cholerae strains cause a disease when ingesting only 10 cells, whereas with some Escherichia coli strains, >106 cells are needed “per os” for disease induction. In the laboratory, researchers, assistants and stude ...
... number of microbial cells that cause an acute infection in humans. E.g. certain Vibrio cholerae strains cause a disease when ingesting only 10 cells, whereas with some Escherichia coli strains, >106 cells are needed “per os” for disease induction. In the laboratory, researchers, assistants and stude ...
Pavetta spp. with a specific focus on those causing leaf nodules
... schumanniana is a deciduous tree (Coates Palgrave, 2002) and should theoretically have a mechanism whereby the leaf nodule bacterial endophytes are stored within the plant during winter. The possible presence of the leaf nodule-forming bacterial endophytes within the stem tissue of nodulated hosts h ...
... schumanniana is a deciduous tree (Coates Palgrave, 2002) and should theoretically have a mechanism whereby the leaf nodule bacterial endophytes are stored within the plant during winter. The possible presence of the leaf nodule-forming bacterial endophytes within the stem tissue of nodulated hosts h ...
Role of bacteria in amoebic gill disease - UTas ePrints
... Winogradskyella species were not consistently present on AGD-affected fish gills. However, it was not possible to determine which bacteria will colonise the gills of AGD affected fish in a given period of time because the changes occurring within the gill bacterial population appeared to be complex ...
... Winogradskyella species were not consistently present on AGD-affected fish gills. However, it was not possible to determine which bacteria will colonise the gills of AGD affected fish in a given period of time because the changes occurring within the gill bacterial population appeared to be complex ...
Opinion of ANSES on the use of bacteriophages in foods of animal
... Most known phages (>400 phages) of the Listeria genus invade the DNA of the host cell (temperate phages) (Carlton et al., 2005). For these phages, a DNA cassette controls lysogeny. This cassette is however absent in the genome of bacteriophages P100 and A511; their cycle of infection is therefore pu ...
... Most known phages (>400 phages) of the Listeria genus invade the DNA of the host cell (temperate phages) (Carlton et al., 2005). For these phages, a DNA cassette controls lysogeny. This cassette is however absent in the genome of bacteriophages P100 and A511; their cycle of infection is therefore pu ...
PZG1 - Alamo Colleges
... the beginning of your first laboratory class. Additional safety training and procedures for specific laboratory activities will be discussed as needed by your laboratory instructor as you progress through the semester. The following rules apply to all microbiology lab sessions: 1. Read your laborato ...
... the beginning of your first laboratory class. Additional safety training and procedures for specific laboratory activities will be discussed as needed by your laboratory instructor as you progress through the semester. The following rules apply to all microbiology lab sessions: 1. Read your laborato ...
The killer trait of Paramecium and its causative
... bright is apparently problematic: Caedibacter harbouring an R-body lose the capacity to reproduce. Only nonbrights are reproductive and undergo cell division by normal binary fission. In general, R-bodies are produced by just a fraction of the Caedibacter population. The proportion of bright forms t ...
... bright is apparently problematic: Caedibacter harbouring an R-body lose the capacity to reproduce. Only nonbrights are reproductive and undergo cell division by normal binary fission. In general, R-bodies are produced by just a fraction of the Caedibacter population. The proportion of bright forms t ...
Helicobacter pylori
... H. pylori is a heterotrophic, parasitic bacterium. Because it is a single celled bacteria, it does not have a need to transport nutrients within itself. It absorbs its nutrients across its plasma membrane. The Circle of Life H. pylori is most commonly passed from host to host through a fecal-oral or ...
... H. pylori is a heterotrophic, parasitic bacterium. Because it is a single celled bacteria, it does not have a need to transport nutrients within itself. It absorbs its nutrients across its plasma membrane. The Circle of Life H. pylori is most commonly passed from host to host through a fecal-oral or ...
Life at High Salt Concentrations
... Microorganisms A survey of the halophilic microorganisms for metabolic diversity shows that many, but not all types of dissimilatory metabolism known within the prokaryotic world, can function in hypersaline environments as well. Figure 7 presents an overview of the functional diversity of halophili ...
... Microorganisms A survey of the halophilic microorganisms for metabolic diversity shows that many, but not all types of dissimilatory metabolism known within the prokaryotic world, can function in hypersaline environments as well. Figure 7 presents an overview of the functional diversity of halophili ...
Microsoft Word - IBB PAS Repository
... colitis, with sometimes severe complications. Since genes coding for Shiga toxins are located on lambdoid prophages, effective toxin production occurs only after prophage induction. However, although agents which effectively induce prophage (a paradigm of the family of lambdoid phages) under labor ...
... colitis, with sometimes severe complications. Since genes coding for Shiga toxins are located on lambdoid prophages, effective toxin production occurs only after prophage induction. However, although agents which effectively induce prophage (a paradigm of the family of lambdoid phages) under labor ...
A comparative study of the effectiveness of
... The anti bacterial effectiveness of four non-triclosan containing hand soaps was compared with that of six triclosan containing hand soaps. Dilutions of the soaps were used in the preparation of pour plates which were then streaked with cultures of Escherichia coli, Pseudomonas aeruginosa, Salmonell ...
... The anti bacterial effectiveness of four non-triclosan containing hand soaps was compared with that of six triclosan containing hand soaps. Dilutions of the soaps were used in the preparation of pour plates which were then streaked with cultures of Escherichia coli, Pseudomonas aeruginosa, Salmonell ...
the role of earthworm gut-associated microorganisms
... The group of prion diseases also known as transmissible spongiform encephalopathy (TSE) includes the most well-known human prion diseases (kuru, Creutzfeldt-Jakob disease (CJD), and its variants (familial, sporadic, latrogenic, fatal familial insomnia and the new variant of CJD (vCJD) (Will et al. ( ...
... The group of prion diseases also known as transmissible spongiform encephalopathy (TSE) includes the most well-known human prion diseases (kuru, Creutzfeldt-Jakob disease (CJD), and its variants (familial, sporadic, latrogenic, fatal familial insomnia and the new variant of CJD (vCJD) (Will et al. ( ...
Fructose Mediated Catabolite Repression in Sinorhizobium meliloti
... Plants are unable to utilize the N2 form found in the soil environment. Bacteria known as rhizobia are capable of fixing this nitrogen into a form useable by the plant and initiate a symbiotic relationship in the legume root. One species of rhizobia, Sinorhizobium meliloti, has been thoroughly inves ...
... Plants are unable to utilize the N2 form found in the soil environment. Bacteria known as rhizobia are capable of fixing this nitrogen into a form useable by the plant and initiate a symbiotic relationship in the legume root. One species of rhizobia, Sinorhizobium meliloti, has been thoroughly inves ...
designing a biosensor that will detect gram negative and gram
... the salt concentration in the medium. In addition, grouping decisions are made by characterizing bacteria based on their ability to sporulate, their fermentation and enzymatic products, their motility and flagellar orientation. Phenotypically, cell wall composition such as types of fatty acids prese ...
... the salt concentration in the medium. In addition, grouping decisions are made by characterizing bacteria based on their ability to sporulate, their fermentation and enzymatic products, their motility and flagellar orientation. Phenotypically, cell wall composition such as types of fatty acids prese ...
Microbiology Lab Manual Spring 2013
... associated with less serious human diseases whose potential for transmission is limited and a proven treatment for the disease exists. Many BSL-2 pathogens are opportunistic, meaning they don’t ordinarily cause disease in healthy human adults, but may cause disease in children and immunocompromised ...
... associated with less serious human diseases whose potential for transmission is limited and a proven treatment for the disease exists. Many BSL-2 pathogens are opportunistic, meaning they don’t ordinarily cause disease in healthy human adults, but may cause disease in children and immunocompromised ...
Use of Symbiotic Bacteria to Reduce Mass
... they maintain intricate and complex interactions with other organisms in their habitat. Some of these interactions, such as those between insects and plants, or insects and vertebrates, have been extensively studied. On the other hand, the associations between insects and microorganisms, while perva ...
... they maintain intricate and complex interactions with other organisms in their habitat. Some of these interactions, such as those between insects and plants, or insects and vertebrates, have been extensively studied. On the other hand, the associations between insects and microorganisms, while perva ...
LAB MANUAL for BIOL 2420 - IWS2.collin.edu
... associated with less serious human diseases whose potential for transmission is limited and a proven treatment for the disease exists. Many BSL-2 pathogens are opportunistic, meaning they don’t ordinarily cause disease in healthy human adults, but may cause disease in children and immunocompromised ...
... associated with less serious human diseases whose potential for transmission is limited and a proven treatment for the disease exists. Many BSL-2 pathogens are opportunistic, meaning they don’t ordinarily cause disease in healthy human adults, but may cause disease in children and immunocompromised ...
Bacterial anti-adhesive properties of polysulfone membranes
... the membrane surface and proliferate to form microcolonies which will grow and coalesce into a biofilm. The formation of a biofilm on a LPM surface will result in higher operating pressures, poorer product water quality, frequent chemical cleaning, and shortened membrane life [2]. Among the different ...
... the membrane surface and proliferate to form microcolonies which will grow and coalesce into a biofilm. The formation of a biofilm on a LPM surface will result in higher operating pressures, poorer product water quality, frequent chemical cleaning, and shortened membrane life [2]. Among the different ...
Lab Memo 36: Speedy Breedy for Detection of Contamination in
... oils. Bacterial contamination of Functional Fluids leads to degradation so most contain a biocide to stop bacterial growth however biocides have a limited operation life and bacteria frequently overcome the biocide, degrading the fluid, making it ineffective, and creating a health hazard for the ope ...
... oils. Bacterial contamination of Functional Fluids leads to degradation so most contain a biocide to stop bacterial growth however biocides have a limited operation life and bacteria frequently overcome the biocide, degrading the fluid, making it ineffective, and creating a health hazard for the ope ...
Symbiotic Conversations Are Revealed Under Genetic Interrogation
... Numerous other attributes that allow for technological applications (BOX 1) have been exploited in a range of natural symbioses, but one that has recently begun to open many questions to experimental evaluation is the ability to genetically manipulate one or more of the symbiotic partners and subseq ...
... Numerous other attributes that allow for technological applications (BOX 1) have been exploited in a range of natural symbioses, but one that has recently begun to open many questions to experimental evaluation is the ability to genetically manipulate one or more of the symbiotic partners and subseq ...
Microbial metabolism of short-chain unsaturated hydrocarbons
... The relative contributions to ethene emissions into the atmosphere from biogenic and anthropogenic sources have been estimated by Sawada and Totsuka [7]. Biogenic sources taken into account were both plants and micro-organisms from terrestrial as well as aquatic ecosystems. The conclusions of Sawada ...
... The relative contributions to ethene emissions into the atmosphere from biogenic and anthropogenic sources have been estimated by Sawada and Totsuka [7]. Biogenic sources taken into account were both plants and micro-organisms from terrestrial as well as aquatic ecosystems. The conclusions of Sawada ...
Antibacterial antibiotics
... of the overuse of many of these agents and the biochemical fickleness of many bacteria, resistance to antibiotics has become a serious problem in the 21st century. Indeed, there are now organisms that cannot be arrested or killed by any of the common antibiotics. Clearly, new approaches are needed. ...
... of the overuse of many of these agents and the biochemical fickleness of many bacteria, resistance to antibiotics has become a serious problem in the 21st century. Indeed, there are now organisms that cannot be arrested or killed by any of the common antibiotics. Clearly, new approaches are needed. ...
Antibacterial Peptide-Based Gel for Prevention of Medical Implanted
... Implanted medical devices are prone to infection. Designing new strategies to reduce infection and implant rejection are an important challenge for modern medicine. To this end, in the last few years many hydrogels have been designed as matrices for antimicrobial molecules destined to fight frequent ...
... Implanted medical devices are prone to infection. Designing new strategies to reduce infection and implant rejection are an important challenge for modern medicine. To this end, in the last few years many hydrogels have been designed as matrices for antimicrobial molecules destined to fight frequent ...
Marine natural products : isolation, identification, and modification of
... secondary metabolites may seem obscure at this point, primary metabolites are defined as those molecules such as amino, nucleic, and fatty acids, complex carbohydrates, or any other biological components vital for the survival of an organism. Secondary metabolites, in contrast, are not vital for lif ...
... secondary metabolites may seem obscure at this point, primary metabolites are defined as those molecules such as amino, nucleic, and fatty acids, complex carbohydrates, or any other biological components vital for the survival of an organism. Secondary metabolites, in contrast, are not vital for lif ...
Bacteria
Bacteria (/bækˈtɪəriə/; singular: bacterium) constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals. They are also known to have flourished in manned spacecraft.There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water. There are approximately 5×1030 bacteria on Earth, forming a biomass which exceeds that of all plants and animals. Bacteria are vital in recycling nutrients, with many of the stages in nutrient cycles dependent on these organisms, such as the fixation of nitrogen from the atmosphere and putrefaction. In the biological communities surrounding hydrothermal vents and cold seeps, bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. On 17 March 2013, researchers reported data that suggested bacterial life forms thrive in the Mariana Trench, which with a depth of up to 11 kilometres is the deepest part of the Earth's oceans. Other researchers reported related studies that microbes thrive inside rocks up to 580 metres below the sea floor under 2.6 kilometres of ocean off the coast of the northwestern United States. According to one of the researchers, ""You can find microbes everywhere — they're extremely adaptable to conditions, and survive wherever they are.""Most bacteria have not been characterized, and only about half of the phyla of bacteria have species that can be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.There are approximately ten times as many bacterial cells in the human flora as there are human cells in the body, with the largest number of the human flora being in the gut flora, and a large number on the skin. The vast majority of the bacteria in the body are rendered harmless by the protective effects of the immune system, and some are beneficial. However, several species of bacteria are pathogenic and cause infectious diseases, including cholera, syphilis, anthrax, leprosy, and bubonic plague. The most common fatal bacterial diseases are respiratory infections, with tuberculosis alone killing about 2 million people per year, mostly in sub-Saharan Africa. In developed countries, antibiotics are used to treat bacterial infections and are also used in farming, making antibiotic resistance a growing problem. In industry, bacteria are important in sewage treatment and the breakdown of oil spills, the production of cheese and yogurt through fermentation, and the recovery of gold, palladium, copper and other metals in the mining sector, as well as in biotechnology, and the manufacture of antibiotics and other chemicals.Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.