what is bacterial aggregation
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Basic researchâbiologyAutoaggregation and Coaggregation of Bacteria Associated with Acute Endodontic Infections Biofilms and microbial aggregates are a common mechanism for the survival of bacteria in nature. Microbial aggregates have been associated with intraradicular and extraradicular endodontic disease.
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- Bacterial vaginosis is a vaginal condition that can produce vaginal discharge and results from an overgrowth of certain kinds of bacteria in the vagina. In the past, the condition was called Gardnerella vaginitis, after the bacteria that were thought to cause the condition.ymptoms may also mimic those found in yeast infections of the vagina and trichomoniasis (a sexually-transmitted disease or STD), and these conditions must also be excluded in women with vaginal symptoms. Bacterial vaginosis is a common condition.
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Compost Microorganisms Bacteria. Bacteria are the smallest living organisms and the most numerous in compost; they make up 80 to 90% of the billions of microorganisms typically found in a gram of compost.Bacteria are responsible for most of the decomposition and heat generation in compost.They are the most nutritionally diverse group of compost organisms, using a broad range of enzymes to chemically break down a variety of organic materials.acteria are responsible for most of the decomposition and heat generation in compost. They are the most nutritionally diverse group of compost organisms, using a broad range of enzymes to chemically break down a variety of organic materials.
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- Changes to prevailing notions about the. citizenship rights of blacks, for example, coupled with a redefini-. tion of the role of the government and courts in protecting these. rights, continue to bolster the human rights of all Americans, re-. gardless of their skin color.
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Bacterial artificial chromosome A bacterial artificial chromosome is a DNA construct, based on a functional fertility plasmid, used for transforming and cloning in bacteria, usually E. coli. F-plasmids play a crucial role because they contain partition genes that promote the even distribution of plasmids after bacterial cell division. The bacterial artificial chromosome's usual insert size is 150–350 kbp. A similar cloning vector called a PAC has also been produced from the DNA of P1 bacteriophage. BACs are often used to ...
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aggregation aggregation. 1. massing or clumping of materials together. 2. a clumped mass of material. familial aggregation. the occurrence of more cases of a given disorder in close relatives of an animal with the disorder than in control families.
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Circular bacterial chromosome A circular bacterial chromosome is a bacterial chromosome in the form of a molecule of circular DNA. Unlike the linear DNA of most eukaryotes, typical bacterial chromosomes are circular.ventually, the two replication forks moving around the circular chromosome meet in a specific zone of the chromosome, approximately opposite oriC, called the terminus region. The elongation enzymes then disassemble, and the two daughter chromosomes are resolved before cell division is completed.
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Bacterial Vaginosis - Topic Overview Bacterial Vaginosis - Topic Overview. Bacterial vaginosis is a mild infection of the vagina caused by bacteria. Normally, there are a lot of good bacteria and some bad bacteria in the vagina. The good types help control the growth of the bad types. In women with bacterial vaginosis, the balance is upset.
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- The tail fibers attach to specific receptors on the bacterial cell and the host specificity of the phage (i.e. the bacteria that it is able to infect) is usually determined by the type of tail fibers that a phage has. The nature of the bacterial receptor varies for different bacteria.acteriophage (phage) are obligate intracellular parasites that multiply inside bacteria by making use of some or all of the host biosynthetic machinery (i.e., viruses that infect bacteria.). There are many similarities between bacteriophages and animal cell viruses.
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Microbiological culture A microbiological culture, or microbial culture, is a method of multiplying microbial organisms by letting them reproduce in predetermined culture media under controlled laboratory conditions. Microbial cultures are used to determine the type of organism, its abundance in the sample being tested, or both.irus or phage cultures require host cells in which the virus or phage multiply. For bacteriophages, cultures are grown by infecting bacterial cells. The phage can then be isolated from the resulting plaques in a lawn of bacteria on a plate. Virus cultures are obtained from their appropriate eukaryotic host cells.
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Bacterial growth Bacterial growth. Growth is shown as L = log(numbers) where numbers is the number of colony forming units per ml, versus T (time.) Bacterial growth is the asexual reproduction, or cell division, of a bacterium into two daughter cells, in a process called binary fission.
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Growthof bacterial populations Bacteria - Growth of bacterial populations: Growth of bacterial cultures is defined as an increase in the number of bacteria in a population rather than in the size of individual cells. The growth of a bacterial population occurs in a geometric or exponential manner: with each division cycle (generation), one cell gives rise to 2 cells, then 4 cells, then 8 cells, then 16, then 32, and so forth.
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- When a single bacterial cell is deposited on a solid nutrient medium, it begins to divide. One cell makes two, two makes four, four make eight. Eventually a visible mass of cells, a colony, appears. 2.
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Alpha Complementation method for Bacterial Screening Alpha Complementation method for Bacterial Screening. Alpha complementation is a method for bacterial screening that have been transformed with a plasmid vector, carrying the N-terminal coding sequence for β-galactosidase of the lac operon.
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- (August 2015) (Learn how and when to remove this template message) An aggregation number is a description of the number of molecules present in a micelle once the critical micelle concentration (cmc) has been reached.
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Bacterial growth Bacterial growth is the asexual reproduction, or cell division, of a bacterium into two daughter cells, in a process called binary fission.Providing no mutational event occurs the resulting daughter cells are genetically identical to the original cell.Hence, local doubling of the bacterial population occurs.acterial growth is the asexual reproduction, or cell division, of a bacterium into two daughter cells, in a process called binary fission.
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- Bacteria and viruses have unique genome organization and therefore they use different method for genetic mapping and gene analysis. In bacterial conjugation, transformation and transduction are used for genetic material transfer, also used for genetic mapping.opic Review on  Title : Introduction. Genetic analysis in bacteria and viruses are different than that in eukaryotes because bacteria and viruses have special genome organization, therefore different techniques and methods are used to analyze their genes and mutations.
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Circular bacterial chromosome (Graphic computer art by Daniel Yuen). A circular bacterial chromosome is a bacterial chromosome in the form of a molecule of circular DNA. Unlike the linear DNA of most eukaryotes, typical bacterial chromosomes are circular. Most bacterial chromosomes contain a circular DNA molecule – there are no free ends to the DNA. Free ends would otherwise create significant challenges to cells with respect to DNA replication and stability.
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We are living in a bacterial world, and it's impacting us more than previously thought An insect (1 mm) living in a forest canopy (10 m) illustrates the effects animal-bacterial interactions across multiple scales. Bacteria (1 micrometer) residing in the animal’s gut (0.1 mm) are essential to the insect’s nutrition, and insects often make up a majority of the animal biomass in forest canopies. Credit: Margaret McFall-Ngai, et al.
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Bacterial Transduction: Definition, Process & Advantages Specialized Transduction. The second type of transduction is called specialized transduction. In this process, instead of just hijacking and killing the cell, the viral DNA goes dormant by incorporating itself into the bacterial DNA chromosome.he first is called generalized transduction. In some cases, the bacteriophage interaction with the bacteria is quite simple-the virus invades, hijacks the host to generate copies of itself, then kills the host cell by popping it like a balloon (called lysis).
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- More light is absorbed when more cells are present-some people like this measure better because absorbance goes up as turbidity (or cell number) goes up. Another indirect way of estimating bacterial numbers is measuring the metabolic activity of the population (for example, acid production or oxygen consumption). For filamentous organisms such as fungi, measuring dry weight is a convenient method of growth measurement.
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Lancefield grouping Lancefield grouping is grouping catalase-negative, coagulase-negative bacteria based on the carbohydrate composition of bacterial antigens found on their cell walls.
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Bacterial Transduction: Definition, Process & Advantages The second is conjugation, which allows for the transfer of DNA through a structure called a pilus from one cell to another. Bacterial conjugation can be likened to the mating rituals of other species in the sense that it requires direct cell-to-cell contact and involves the exchange of genetic material. The final mechanism of horizontal gene transfer is transduction, which uses bacteria viruses to transfer DNA from one cell to another.
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bacterial translocation bacterial translocation. 1. the movement of bacteria or bacterial products across the intestinal membrane to emerge either in the lymphatics or the visceral circulation. Stedman’s Medical Dictionary © Wolters Kluwer Health.
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Small intestinal bacterial overgrowth Small intestinal bacterial overgrowth (SIBO), also termed bacterial overgrowth, or small bowel bacterial overgrowth syndrome (SBBOS), is a disorder of excessive bacterial growth in the small intestine.mall intestinal bacterial overgrowth (SIBO), also termed bacterial overgrowth, or small bowel bacterial overgrowth syndrome (SBBOS), is a disorder of excessive bacterial growth in the small intestine.
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Bacterial Transduction: Definition, Process & Advantages But in the bacterial world, this is definitely possible. In bacteria, vertical gene transfer is the transfer or inheritance of genetic material from parent (or mother) cell to offspring cell. This process effectively generates clones of the parent cell.