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Angomonas Deanei
''Angomonas deanei'' is a flagellated trypanosomatid protozoan. As an obligate parasite, it infects the gastrointestinal tract of insects, and is in turn a host to symbiotic bacteria. The bacterial endosymbiont ''Ca.'' "''Kinetoplastibacterium crithidii''" maintains a permanent mutualistic relationship with the protozoan such that it is no longer able to reproduce and survive on its own. The symbiosis, subsequently also discovered in varying degrees in other protists such as ''Strigomonas culicis, Novymonas esmeraldas, Diplonema japonicum'' and ''Diplonema aggregatum'' are considered as good models for the understanding of the evolution of eukaryotes from prokaryotes, and on the origin of cell organelles (i.e. symbiogenesis). The species was first described as ''Crithidia deanei'' in 1973 by a Brazilian parasitologist Aurora L. M. Carvalho. A phylogenetic analysis in 2011 revealed that it belongs to the genus ''Angomonas'', thereby becoming ''Angomonas deanei''. The symbiot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flagellum
A flagellum (; ) is a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility. Many protists with flagella are termed as flagellates. A microorganism may have from one to many flagella. A gram-negative bacterium ''Helicobacter pylori'' for example uses its multiple flagella to propel itself through the mucus lining to reach the stomach epithelium, where it may cause a gastric ulcer to develop. In some bacteria the flagellum can also function as a sensory organelle, being sensitive to wetness outside the cell. Across the three domains of Bacteria, Archaea, and Eukaryota the flagellum has a different structure, protein composition, and mechanism of propulsion but shares the same function of providing motility. The Latin word means " whip" to describe its lash-like swimming motion. The flagellum in archaea is called the archaellum to note its difference from the bacterial flagellum. Eukaryotic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bordetella
''Bordetella'' () is a genus of small (0.2 – 0.7 µm), gram-negative coccobacilli of the phylum Pseudomonadota. ''Bordetella'' species, with the exception of '' B. petrii'', are obligate aerobes, as well as highly fastidious, or difficult to culture. All species can infect humans. The first three species to be described ('' B. pertussis'', '' B. parapertussis'', '' B. bronchiseptica''); are sometimes referred to as the 'classical species'. Two of these (''B. bronchiseptica'' and ''B. pertussis'') are also motile. ''B. pertussis'' and occasionally ''B. parapertussis'' cause pertussis or whooping cough in humans, and some ''B. parapertussis'' strains can colonise sheep. ''B. bronchiseptica'' rarely infects healthy humans, though disease in immunocompromised patients has been reported. ''B. bronchiseptica'' causes several diseases in other mammals, including kennel cough and atrophic rhinitis in dogs and pigs, respectively. Other members of the genus cause similar diseases in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peptidoglycan
Peptidoglycan or murein is a unique large macromolecule, a polysaccharide, consisting of sugars and amino acids that forms a mesh-like peptidoglycan layer outside the plasma membrane, the rigid cell wall (murein sacculus) characteristic of most bacteria (domain ''Bacteria''). The sugar component consists of alternating residues of β-(1,4) linked ''N''-acetylglucosamine (NAG) and ''N''-acetylmuramic acid (NAM). Attached to the ''N''-acetylmuramic acid is a oligopeptide chain made of three to five amino acids. The peptide chain can be cross-linked to the peptide chain of another strand forming the 3D mesh-like layer. Peptidoglycan serves a structural role in the bacterial cell wall, giving structural strength, as well as counteracting the osmotic pressure of the cytoplasm. This repetitive linking results in a dense peptidoglycan layer which is critical for maintaining cell form and withstanding high osmotic pressures, and it is regularly replaced by peptidoglycan production. Pep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphatidylcholine
Phosphatidylcholines (PC) are a class of phospholipids that incorporate choline as a headgroup. They are a major component of biological membranes and can be easily obtained from a variety of readily available sources, such as egg yolk or soybeans, from which they are mechanically or chemically extracted using hexane. They are also a member of the lecithin group of yellow-brownish fatty substances occurring in animal and plant tissues. Dipalmitoyl phosphatidylcholine (a.k.a. lecithin) is a major component of pulmonary surfactant and is often used in the L/S ratio to calculate fetal lung maturity. While phosphatidylcholines are found in all plant and animal cells, they are absent in the membranes of most bacteria, including ''Escherichia coli''. Purified phosphatidylcholine is produced commercially. The name ''lecithin'' was derived from Greek λέκιθος, ''lekithos'' 'egg yolk' by Theodore Nicolas Gobley, a French chemist and pharmacist of the mid-19th century, who appli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gram-negative Bacteria
Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wall sandwiched between an inner cytoplasmic cell membrane and a bacterial outer membrane. Gram-negative bacteria are found in virtually all environments on Earth that support life. The gram-negative bacteria include the model organism ''Escherichia coli'', as well as many pathogenic bacteria, such as ''Pseudomonas aeruginosa'', '' Chlamydia trachomatis'', and ''Yersinia pestis''. They are a significant medical challenge as their outer membrane protects them from many antibiotics (including penicillin), detergents that would normally damage the inner cell membrane, and lysozyme, an antimicrobial enzyme produced by animals that forms part of the innate immune system. Additionally, the outer leaflet of this membrane comprises a complex lipopol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cell Membranes
The cell membrane (also known as the plasma membrane (PM) or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of all cells from the outside environment (the extracellular space). The cell membrane consists of a lipid bilayer, made up of two layers of phospholipids with cholesterols (a lipid component) interspersed between them, maintaining appropriate membrane fluidity at various temperatures. The membrane also contains membrane proteins, including integral proteins that span the membrane and serve as membrane transporters, and peripheral proteins that loosely attach to the outer (peripheral) side of the cell membrane, acting as enzymes to facilitate interaction with the cell's environment. Glycolipids embedded in the outer lipid layer serve a similar purpose. The cell membrane controls the movement of substances in and out of cells and organelles, being selectively permeable to ions a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angomonas Deanei
''Angomonas deanei'' is a flagellated trypanosomatid protozoan. As an obligate parasite, it infects the gastrointestinal tract of insects, and is in turn a host to symbiotic bacteria. The bacterial endosymbiont ''Ca.'' "''Kinetoplastibacterium crithidii''" maintains a permanent mutualistic relationship with the protozoan such that it is no longer able to reproduce and survive on its own. The symbiosis, subsequently also discovered in varying degrees in other protists such as ''Strigomonas culicis, Novymonas esmeraldas, Diplonema japonicum'' and ''Diplonema aggregatum'' are considered as good models for the understanding of the evolution of eukaryotes from prokaryotes, and on the origin of cell organelles (i.e. symbiogenesis). The species was first described as ''Crithidia deanei'' in 1973 by a Brazilian parasitologist Aurora L. M. Carvalho. A phylogenetic analysis in 2011 revealed that it belongs to the genus ''Angomonas'', thereby becoming ''Angomonas deanei''. The symbiot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of São Paulo
The University of São Paulo ( pt, Universidade de São Paulo, USP) is a public university in the Brazilian state of São Paulo. It is the largest Brazilian public university and the country's most prestigious educational institution, the best university in Ibero-America, and holds a high reputation among world universities, being ranked 100 worldwide in reputation by the Times Higher Education World University Rankings. The USP is involved in teaching, research and university extension in all areas of knowledge, offering a broad range of courses. The university was founded in 1934, regrouping already existing schools in the state of São Paulo, such as the Faculdade de Direito do Largo de São Francisco (Faculty of Law), the Escola Politécnica (Engineering School) and the Escola Superior de Agricultura Luiz de Queiroz (College of Agriculture). The university's foundation is marked by the creation in 1934 of the Faculdade de Filosofia, Ciências e Letras (Faculty of Philoso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Instituto Oswaldo Cruz
The Oswaldo Cruz Foundation (Portuguese ''Fundação Oswaldo Cruz'', also known as FIOCRUZ) is a scientific institution for research and development in biological sciences located in Rio de Janeiro, Brazil; it is considered one of the world's main public health research institutions. It was founded by Dr. Oswaldo Cruz, a noted physician and epidemiologist. The organization started in 1898 as the Federal SeroTherapy Institute with the objective of developing serum and vaccines against the bubonic plague. It was located outside Rio de Janeiro. The institute's activities, however, changed from simple production into research and experimental medicine, especially after Oswaldo Cruz assumed its leadership in 1902. From there on, the institute became the base for memorable sanitation campaigns in an age of outbreaks and epidemics of the bubonic plague, yellow fever, and smallpox. The institute, however, was not confined to Rio de Janeiro and collaborated in the occupation of the count ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloramphenicol
Chloramphenicol is an antibiotic useful for the treatment of a number of bacterial infections. This includes use as an eye ointment to treat conjunctivitis. By mouth or by injection into a vein, it is used to treat meningitis, plague, cholera, and typhoid fever. Its use by mouth or by injection is only recommended when safer antibiotics cannot be used. Monitoring both blood levels of the medication and blood cell levels every two days is recommended during treatment. Common side effects include bone marrow suppression, nausea, and diarrhea. The bone marrow suppression may result in death. To reduce the risk of side effects treatment duration should be as short as possible. People with liver or kidney problems may need lower doses. In young children a condition known as gray baby syndrome may occur which results in a swollen stomach and low blood pressure. Its use near the end of pregnancy and during breastfeeding is typically not recommended. Chloramphenicol is a broad-spectrum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universidade De Brasilia
The Universiade is an international multi-sport event, organized for university athletes by the International University Sports Federation (FISU). The name is a portmanteau of the words "University" and "Olympiad". The Universiade is referred to in English as the World University Games or World Student Games; however, this latter term can also refer to competitions for sub-University grades students. In July 2020 as part of a new branding system by the FISU, it was stated that the Universiade will be officially branded as the FISU World University Games. The most recent games were held in 2019: the Winter Universiade was held in Krasnoyarsk, Russia while the Summer Universiade was held in Naples, Italy. The next Winter World University Games are scheduled to be held in Lake Placid, United States between 11–21 January 2023, after the 2021 edition scheduled to be held in Lucerne, Switzerland was cancelled due the COVID-19 pandemic. The 2021 Summer World University Games were sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zelus (bug)
''Zelus'' is a genus of insects in the family Reduviidae, the assassin bugs. There are currently 60 described species; most occur in Central and South America, and five are found in North America. Heteropteran Systematics Lab. University of California, Riverside. Some species have been investigated for their potential as biocontrol agents in . ''Zelus'' is also known for a sticky trap predation strategy. Sticky resin produced from a leg gland is smeared on hairs to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
