|
Dehalococcoidetes
''Dehalococcoidia'' is a class of Chloroflexota, a phylum of Bacteria. It is also known as the DHC group. The name ''Dehalococcoidetes'' is a placeholder name given by Hugenholtz and Stackebrandt, 2004, after ''Dehalococcoides ethenogenes'', a partially described species in 1997, whereas the first species fully described belonging to this class was ''Dehalogenimonas lykanthroporepellens'' by Moe et al. 2009, but no emendations to the name were made. Characteristics Both species, ''Dehalococcoides ethenogenes'' and ''Dehalogenimonas lykanthroporepellens'' are irregular coccus (coccoid) bacteria capable of dehalogenating polychlorinated aliphatic alkanes and alkenes, such as tetrachloroethene, trichloropropane, trichloroethane, dichloropropane, and dichloroethane. One of the features of the members of the phylum Chloroflexota is the unusual cell wall structure, which is monoderm but with great variation in presence or structure of the peptidoglycan resulting in many members s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dehalococcoidetes
''Dehalococcoidia'' is a class of Chloroflexota, a phylum of Bacteria. It is also known as the DHC group. The name ''Dehalococcoidetes'' is a placeholder name given by Hugenholtz and Stackebrandt, 2004, after ''Dehalococcoides ethenogenes'', a partially described species in 1997, whereas the first species fully described belonging to this class was ''Dehalogenimonas lykanthroporepellens'' by Moe et al. 2009, but no emendations to the name were made. Characteristics Both species, ''Dehalococcoides ethenogenes'' and ''Dehalogenimonas lykanthroporepellens'' are irregular coccus (coccoid) bacteria capable of dehalogenating polychlorinated aliphatic alkanes and alkenes, such as tetrachloroethene, trichloropropane, trichloroethane, dichloropropane, and dichloroethane. One of the features of the members of the phylum Chloroflexota is the unusual cell wall structure, which is monoderm but with great variation in presence or structure of the peptidoglycan resulting in many members s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dehalogenimonas Lykanthroporepellens
''Dehalogenimonas lykanthroporepellens'' is an anaerobic, Gram-negative bacteria in the phylum Chloroflexota isolated from a Superfund site in Baton Rouge, Louisiana. It is useful in bioremediation for its ability to reductively dehalogenate chlorinated alkanes. Discovery and description ''Dehalogenimonas lykanthroporepellens'' cells are Gram-negative, non-motile, irregular cocci that are 0.3–0.6 μm in diameter. There is no evidence of pathogenicity. They are mesophiles that can grow in a temperature range of 20–34 °C with their optimum temperature range being 28–34 °C. They grow best in pH 7-7.5 (pH range 6–8, although it was isolated from groundwater of pH 5.1). Growth has been observed in salt concentrations from 0.1–2% NaCl with optimum growth at ≤1%. GC-content reported in characterization of ''D''. ''lykanthroporellens'' is 53.8% as determined by HPLC; however, as determined by genomic analysis, the GC-content is 55.04%. ''D''. ''lyankanthropor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroflexota
The Chloroflexota are a phylum of bacteria containing isolates with a diversity of phenotypes, including members that are aerobic thermophiles, which use oxygen and grow well in high temperatures; anoxygenic phototrophs, which use light for photosynthesis (green non-sulfur bacteria); and anaerobic halorespirers, which uses halogenated organics (such as the toxic chlorinated ethenes and polychlorinated biphenyls) as electron acceptors. The members of the phylum ''Chloroflexota'' are monoderms (that is, have one cell membrane with no outer membrane), but they stain mostly gram-negative. Many well-studied phyla of bacteria are diderms and stain gram-negative, whereas well-known monoderms that stain Gram-positive include ''Firmicutes'' (or ''Bacillota'') ( low G+C gram-positives), ''Actinomycetota'' (high-G+C gram-positives) and ''Deinococcota'' (gram-positive diderms with thick peptidoglycan). History The taxon name was created in the 2001 edition of Volume 1 of Bergey's Manual of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioaugmentation
Biological augmentation is the addition of archaea or bacterial cultures required to speed up the rate of degradation of a contaminant. Organisms that originate from contaminated areas may already be able to break down waste, but perhaps inefficiently and slowly. Bioaugmentation is a type of bioremediation in which it requires studying the indigenous varieties present in the location to determine if biostimulation is possible. After discovering the indigenous bacteria found in the location, if the indigenous bacteria can metabolize the contaminants, more of the indigenous bacterial cultures will be implemented into the location to boost the degradation of the contaminants. Bioaugmentation is the introduction of more archaea or bacterial cultures to enhance the contaminant degradation whereas biostimulation is the addition of nutritional supplements for the indigenous bacteria to promote the bacterial metabolism. If the indigenous variety do not have the metabolic capability to perfo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dehalogenimonas
''Dehalogenimonas'' is a genus in the phylum Chloroflexota (Bacteria). Members of the genus ''Dehalogenimonas'' can be referred to as dehalogenimonads (''viz.'' Trivialisation of names). Etymology The name ''Dehalogenimonas'' derives from:Latin prep. ''de'', away, off; New Latin noun ''halogenum'', halogen; Latin feminine gender noun '' monas (μονάς)'', unit, monad; New Latin feminine gender noun ''Dehalogenimonas'', dehalogenating monad, reflecting the ability of these bacteria to dehalogenate chlorinated alkanes. The type species of the genus is '' D. lykanthroporepellens'' ( Moe ''et al''. 2009). The species epithet derives from the Greek noun ''lykanthropos (λυκάνθρωπος)'', werewolf; Latin participle adjective ''repellens'', repelling; New Latin participle adjective ''lykanthroporepellens'', repelling `werewolves, because compounds exhibiting a pungent garlic aroma are produced when these organisms grow in the presence of 1,2,3-trichloropropane as an electro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monoderm
In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bacteria take up the crystal violet stain used in the test, and then appear to be purple-coloured when seen through an optical microscope. This is because the thick peptidoglycan layer in the bacterial cell wall retains the stain (biology), stain after it is washed away from the rest of the sample, in the decolorization stage of the test. Conversely, gram-negative bacteria cannot retain the violet stain after the decolorization step; alcohol (chemistry), alcohol used in this stage degrades the outer membrane of gram-negative cells, making the cell wall more porous and incapable of retaining the crystal violet stain. Their peptidoglycan layer is much thinner and sandwiched between an inner cell membrane and a bacterial outer membrane, causing th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lysozyme
Lysozyme (EC 3.2.1.17, muramidase, ''N''-acetylmuramide glycanhydrolase; systematic name peptidoglycan ''N''-acetylmuramoylhydrolase) is an antimicrobial enzyme produced by animals that forms part of the innate immune system. It is a glycoside hydrolase that catalyzes the following process: : Hydrolysis of (1→4)-β-linkages between ''N''-acetylmuramic acid and ''N''-acetyl-D-glucosamine residues in a peptidoglycan and between ''N''-acetyl-D-glucosamine residues in chitodextrins Peptidoglycan is the major component of gram-positive bacterial cell wall. This hydrolysis in turn compromises the integrity of bacterial cell walls causing lysis of the bacteria. Lysozyme is abundant in secretions including tears, saliva, human milk, and mucus. It is also present in cytoplasmic granules of the macrophages and the polymorphonuclear neutrophils (PMNs). Large amounts of lysozyme can be found in egg white. C-type lysozymes are closely related to α-lactalbumin in sequence and structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vancomycin
Vancomycin is a glycopeptide antibiotic medication used to treat a number of bacterial infections. It is recommended intravenously as a treatment for complicated skin infections, bloodstream infections, endocarditis, bone and joint infections, and meningitis caused by methicillin-resistant ''Staphylococcus aureus''. Blood levels may be measured to determine the correct dose. Vancomycin is also taken by mouth as a treatment for severe ''Clostridium difficile'' colitis. When taken by mouth it is poorly absorbed. Common side effects include pain in the area of injection and allergic reactions. Occasionally, hearing loss, low blood pressure, or bone marrow suppression occur. Safety in pregnancy is not clear, but no evidence of harm has been found, and it is likely safe for use when breastfeeding. It is a type of glycopeptide antibiotic and works by blocking the construction of a cell wall. Vancomycin was approved for medical use in the United States in 1958. It is on the World ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ampicillin
Ampicillin is an antibiotic used to prevent and treat a number of bacterial infections, such as respiratory tract infections, urinary tract infections, meningitis, salmonellosis, and endocarditis. It may also be used to prevent group B streptococcal infection in newborns. It is used by mouth, by injection into a muscle, or intravenously. Common side effects include rash, nausea, and diarrhea. It should not be used in people who are allergic to penicillin. Serious side effects may include ''Clostridium difficile'' colitis or anaphylaxis. While usable in those with kidney problems, the dose may need to be decreased. Its use during pregnancy and breastfeeding appears to be generally safe. Ampicillin was discovered in 1958 and came into commercial use in 1961. It is on the World Health Organization's List of Essential Medicines. The World Health Organization classifies ampicillin as critically important for human medicine. It is available as a generic medication. Medical uses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gram Negative
The gram (originally gramme; SI unit symbol g) is a unit of mass in the International System of Units (SI) equal to one one thousandth of a kilogram. Originally defined as of 1795 as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre the_temperature_of_Melting_point.html" "title="Melting_point_of_water.html" ;"title="Cubic_centimetre.html" ;"title=" Cubic centimetre">cm3], and at Melting point of water">the temperature of Melting point">melting ice", the defining temperature (~0 °C) was later changed to 4 °C, the temperature of maximum density of water. However, by the late 19th century, there was an effort to make the Base unit (measurement), base unit the kilogram and the gram a derived unit. In 1960, the new International System of Units defined a ''gram'' as one one-thousandth of a kilogram (i.e., one gram is Scientific notation, 1×10−3 kg). The kilogram, as of 2019, is defined by the International Bur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gram-positive
In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bacteria take up the crystal violet stain used in the test, and then appear to be purple-coloured when seen through an optical microscope. This is because the thick peptidoglycan layer in the bacterial cell wall retains the stain after it is washed away from the rest of the sample, in the decolorization stage of the test. Conversely, gram-negative bacteria cannot retain the violet stain after the decolorization step; alcohol used in this stage degrades the outer membrane of gram-negative cells, making the cell wall more porous and incapable of retaining the crystal violet stain. Their peptidoglycan layer is much thinner and sandwiched between an inner cell membrane and a bacterial outer membrane, causing them to take up the counterstain (saf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Gram Negative")
