Teacher`s Guide - Discovery Education
... The video next describes how antibodies that have been manufactured as a result of an invasion by a specific pathogen remain in the blood. If the same kind of pathogen enters the blood again later, they are ready to destroy it. The body is also primed to make the right kind of antibodies very quickl ...
... The video next describes how antibodies that have been manufactured as a result of an invasion by a specific pathogen remain in the blood. If the same kind of pathogen enters the blood again later, they are ready to destroy it. The body is also primed to make the right kind of antibodies very quickl ...
Pathogenic and Beneficial Plant-Associated Bacteria
... Lower DNA sequencing costs and simplified analysis software are driving the popularity of DNA sequence-based approaches for bacterial classification. The use of small subunit ribosomal RNA (16S rDNA) gene sequences has become the standard for phylogenetic relationship studies, and the number of sequ ...
... Lower DNA sequencing costs and simplified analysis software are driving the popularity of DNA sequence-based approaches for bacterial classification. The use of small subunit ribosomal RNA (16S rDNA) gene sequences has become the standard for phylogenetic relationship studies, and the number of sequ ...
Applied and Environmental Microbiology
... and Okibacterium, whereas the majority of endophytes showed high levels of similarity to Methylobacterium mesophilicum. Additionally, Sphingomonas spp. were abundant. Isolates were resistant to Ni concentrations between 5 and 12 mM; however, endophytes generally tolerated higher Ni levels than rhizo ...
... and Okibacterium, whereas the majority of endophytes showed high levels of similarity to Methylobacterium mesophilicum. Additionally, Sphingomonas spp. were abundant. Isolates were resistant to Ni concentrations between 5 and 12 mM; however, endophytes generally tolerated higher Ni levels than rhizo ...
Taxonomical Classification of Bacteria by MALDI - TOF
... Figure 6: Comparison of MALDI-TOF MS spectral fingerprint of Serratia marcescens NCTC 10036, the first database match (Top) to the parallel test data for Serratia marinorubra NCTC 10845, with the second, third and fourth database matches of Serratia rubidaea, homotypic synonym Serratia marinorubra ( ...
... Figure 6: Comparison of MALDI-TOF MS spectral fingerprint of Serratia marcescens NCTC 10036, the first database match (Top) to the parallel test data for Serratia marinorubra NCTC 10845, with the second, third and fourth database matches of Serratia rubidaea, homotypic synonym Serratia marinorubra ( ...
Biological Degradation of Naphthalene: A New Era
... should not be surprising. Gram positive bacteria have a stronger cell envelope than Gram negative bacteria and this allows them to thrive in the highly variable intertidal sediment environment, where sediment temperatures are high in the day and osmotic pressures and nutrient supply may change perio ...
... should not be surprising. Gram positive bacteria have a stronger cell envelope than Gram negative bacteria and this allows them to thrive in the highly variable intertidal sediment environment, where sediment temperatures are high in the day and osmotic pressures and nutrient supply may change perio ...
The plate count
... The number of bacteria in a given sample is usually too great to be counted directly. However, if the sample is serially diluted and then plated out on an agar surface in such a manner that single isolated bacteria form visible isolated colonies, the number of colonies can be used as a measure of ...
... The number of bacteria in a given sample is usually too great to be counted directly. However, if the sample is serially diluted and then plated out on an agar surface in such a manner that single isolated bacteria form visible isolated colonies, the number of colonies can be used as a measure of ...
Bacterial differentiation within Moraxella bovis colonies growing at
... In the second method, the bacteria were grown under a thin agar layer (<4 mm). The agar was left in the dish and a piece of round Whatman no. 1 filter paper was laid on the agar surface. Several layers of dry paper towels were then laid on the filter paper. To ensure the filter paper and towels had ...
... In the second method, the bacteria were grown under a thin agar layer (<4 mm). The agar was left in the dish and a piece of round Whatman no. 1 filter paper was laid on the agar surface. Several layers of dry paper towels were then laid on the filter paper. To ensure the filter paper and towels had ...
Biology revision
... 3. ring species – neighbouring populations of species may have slightly different characteristics but can still interbreed as part of a chain but the two ends of the chain can’t interbreed. ...
... 3. ring species – neighbouring populations of species may have slightly different characteristics but can still interbreed as part of a chain but the two ends of the chain can’t interbreed. ...
ISOLATION AND CHARACTERIZATION OF FREE
... Arabia showed that no works were recorded on Azotobacter sp. (Al-Nakhli, et al., 1999, Almajhdi, et al., 2009, Al-Arfaj, et al., 2012, Eifan, 2012, AlSum and Al-Dhabi, 2014 and Sadik, et al., 2014). Therefore, we are focusing on isolation of bacteriophage(s) specific to some free N2-fixer bacteria ( ...
... Arabia showed that no works were recorded on Azotobacter sp. (Al-Nakhli, et al., 1999, Almajhdi, et al., 2009, Al-Arfaj, et al., 2012, Eifan, 2012, AlSum and Al-Dhabi, 2014 and Sadik, et al., 2014). Therefore, we are focusing on isolation of bacteriophage(s) specific to some free N2-fixer bacteria ( ...
Viruses - Sign In
... viruses are parasites. A parasite is an organism that depends entirely upon another living organism for its existence in such a way that it harms that organism. Are viruses alive? If we require that living things be made up of cells and be able to live independently, then viruses are not alive. Howe ...
... viruses are parasites. A parasite is an organism that depends entirely upon another living organism for its existence in such a way that it harms that organism. Are viruses alive? If we require that living things be made up of cells and be able to live independently, then viruses are not alive. Howe ...
Role of Special Histochemical Stains in Staining
... consists of dividing them into Gram-positive and Gram negative bacteria based on whether they take up the Gram’s stain or not. Although the exact mechanism of staining is not known, bacteria that have large amounts of peptidoglycan in their walls retain the methyl violet stain, i.e., they are gram p ...
... consists of dividing them into Gram-positive and Gram negative bacteria based on whether they take up the Gram’s stain or not. Although the exact mechanism of staining is not known, bacteria that have large amounts of peptidoglycan in their walls retain the methyl violet stain, i.e., they are gram p ...
Decay
... • Detritus feeders, such as earthworms and woodlice, do the job of breaking larger bits of matter into smaller pieces. • The work Detritus feeders makes decay much quicker. ...
... • Detritus feeders, such as earthworms and woodlice, do the job of breaking larger bits of matter into smaller pieces. • The work Detritus feeders makes decay much quicker. ...
III
... generally fit this description and in addition, but not exclusively, are all strict aerobes, catalase-positive, oxidase-negative, and often contain metachromatic granules. Until recently, the phytopathogenic coryneform bacteria were all classified in the genus Corynebacterium, primarily based on the ...
... generally fit this description and in addition, but not exclusively, are all strict aerobes, catalase-positive, oxidase-negative, and often contain metachromatic granules. Until recently, the phytopathogenic coryneform bacteria were all classified in the genus Corynebacterium, primarily based on the ...
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... 44. Bacteria and fungi are important in bioremediation. These decomposers are also called ___. ...
... 44. Bacteria and fungi are important in bioremediation. These decomposers are also called ___. ...
Life at Its Many Levels
... Darwin was struck by the diversity of animals on the Galápagos Islands He thought of adaptation to the environment and the origin of new species as closely related processes As populations separated by a geographic barrier adapted to local environments, they became separate species ...
... Darwin was struck by the diversity of animals on the Galápagos Islands He thought of adaptation to the environment and the origin of new species as closely related processes As populations separated by a geographic barrier adapted to local environments, they became separate species ...
UV toothbrush sterilizer
... The UV toothbrush sterilizer reduces your exposure to harmful bacteria and viruses, by sterilizing one of the most common breeding grounds: your toothbrush. Harmful bacteria and viruses living on your toothbrush are transferred to your mouth every time you brush your teeth. This can trigger a range ...
... The UV toothbrush sterilizer reduces your exposure to harmful bacteria and viruses, by sterilizing one of the most common breeding grounds: your toothbrush. Harmful bacteria and viruses living on your toothbrush are transferred to your mouth every time you brush your teeth. This can trigger a range ...
2. Bacteria and archaea are the two main branches of prokaryote
... • Molecular evidence accumulated over the last two decades has lead to the conclusion that there are two major branches of prokaryote evolution, not a single kingdom as in the five-kingdom system. • These two branches are the bacteria and the archaea. • The archaea inhabit extreme environments and d ...
... • Molecular evidence accumulated over the last two decades has lead to the conclusion that there are two major branches of prokaryote evolution, not a single kingdom as in the five-kingdom system. • These two branches are the bacteria and the archaea. • The archaea inhabit extreme environments and d ...
IOSR Journal of Pharmacy and Biological Sciences (IOSR-JPBS) e-ISSN: 2278-3008, p-ISSN:2319-7676.
... water. After 24 hours the collected samples of cockroaches were dipped into the nutrient broth by using the autoclaved forceps and placed them in the incubator-shaker for 16 18 hours at 37 ºC (120 rmp). 2. Preparation of nutrient agar medium To make a nutrient agar medium 6.8 g of nutrient agar was ...
... water. After 24 hours the collected samples of cockroaches were dipped into the nutrient broth by using the autoclaved forceps and placed them in the incubator-shaker for 16 18 hours at 37 ºC (120 rmp). 2. Preparation of nutrient agar medium To make a nutrient agar medium 6.8 g of nutrient agar was ...
acid-fast endospore and capsule stain
... destroying vegetative cell walls do not affect endospores. • Endospores are commonly found in soil and water, where they may survive for long periods of time ...
... destroying vegetative cell walls do not affect endospores. • Endospores are commonly found in soil and water, where they may survive for long periods of time ...
Class: - 09 Chapter: - Diversity in Living Organisms
... b) Multicellular organisms: These are organisms made up of large number of cells with different functions performed by different cells. 3. Mode of obtaining food a) Autotrophs: These are the organisms that make their own food by photosynthesis. b) Heterotrophs: These are the organisms which depend o ...
... b) Multicellular organisms: These are organisms made up of large number of cells with different functions performed by different cells. 3. Mode of obtaining food a) Autotrophs: These are the organisms that make their own food by photosynthesis. b) Heterotrophs: These are the organisms which depend o ...
Determination of the Gram Type Using the Reaction
... medium with peptone, yeast extract and glucose was employed. Incubation withpolymyxin B. Bacteria were suspended in 1 ml10 mM-Tris/HClbuffer, pH 7.2, which, in the case of halophilic bacteria, was supplemented with up to 25% (w/v) NaCl to prevent lysis. Samples (0.25 ml) of this suspension were incu ...
... medium with peptone, yeast extract and glucose was employed. Incubation withpolymyxin B. Bacteria were suspended in 1 ml10 mM-Tris/HClbuffer, pH 7.2, which, in the case of halophilic bacteria, was supplemented with up to 25% (w/v) NaCl to prevent lysis. Samples (0.25 ml) of this suspension were incu ...
Introduction to the Preliminary Identification of Medically Important
... aid in preliminary identification. When identifying bacteria it should be remembered that many of their characteristics might be variable. In addition, species within a genus may differ in some characteristics eg Capnocytophaga canimorsus is oxidase positive, whereas Capnocytophaga ochracea is oxida ...
... aid in preliminary identification. When identifying bacteria it should be remembered that many of their characteristics might be variable. In addition, species within a genus may differ in some characteristics eg Capnocytophaga canimorsus is oxidase positive, whereas Capnocytophaga ochracea is oxida ...
The roots of microbiology and the influence of Ferdinand Cohn on
... that is inherent in living things. The ideas of Naturphilosophie, which dominated in the ¢rst half of the 19th century, especially in Germany, were replaced by the unifying idea of natural sciences in order to discover the laws of nature and to rule humanity. One exponent of this thinking was the Ge ...
... that is inherent in living things. The ideas of Naturphilosophie, which dominated in the ¢rst half of the 19th century, especially in Germany, were replaced by the unifying idea of natural sciences in order to discover the laws of nature and to rule humanity. One exponent of this thinking was the Ge ...
Microbiology Section C
... Draw and label a diagram to show the basic structure of a typical bacterial Other than being prokaryotic, state two ways in which a typical bacterial cell differs from a typical human cell (e.g. cell from cheek lining). Describe how some bacteria respond in order to survive when environmental condit ...
... Draw and label a diagram to show the basic structure of a typical bacterial Other than being prokaryotic, state two ways in which a typical bacterial cell differs from a typical human cell (e.g. cell from cheek lining). Describe how some bacteria respond in order to survive when environmental condit ...