- 関
- R factor、R plasmid
WordNet
- any mechanical force that tends to retard or oppose motion
- the capacity of an organism to defend itself against harmful environmental agents; "these trees are widely planted because of their resistance to salt and smog"
- the action of opposing something that you disapprove or disagree with; "he encountered a general feeling of resistance from many citizens"; "despite opposition from the newspapers he went ahead" (同)opposition
- (psychiatry) an unwillingness to bring repressed feelings into conscious awareness
- group action in opposition to those in power
- the military action of resisting the enemys advance; "the enemy offered little resistance"
- the degree of unresponsiveness of a disease-causing microorganism to antibiotics or other drugs (as in penicillin-resistant bacteria)
- be a contributing factor; "make things factor into a companys profitability"
- any of the numbers (or symbols) that form a product when multiplied together
- an independent variable in statistics
- anything that contributes causally to a result; "a number of factors determined the outcome"
- consider as relevant when making a decision; "You must factor in the recent developments" (同)factor in, factor out
- resolve into factors; "a quantum computer can factor the number 15" (同)factor in, factor out
- an event known to have happened or something known to have existed; "your fears have no basis in fact"; "how much of the story is fact and how much fiction is hard to tell"
- a concept whose truth can be proved; "scientific hypotheses are not facts"
- a piece of information about circumstances that exist or events that have occurred; "first you must collect all the facts of the case"
- a statement or assertion of verified information about something that is the case or has happened; "he supported his argument with an impressive array of facts"
PrepTutorEJDIC
- 〈U〉〈C〉(…に)『抵抗』(『反抗』)『すること』;(…を)『こらえること』《+『to』(『against』)+『名』(do『ing』)》 / 〈U〉(病気などに対する)『抵抗力』《+『against』(『to』)+『名』》 / 〈U〉〈C〉(またresistance movement)(権力・圧制に対する)抵抗運動,レジスタンス / 〈U〉(空気の)抵抗;(電気の)抵抗
- (…の)『要因』,(…を生み出す)要素《+『in』+『名』(do『ing』)》 / 囲数,約数 / 代理人,《おもに英》仲買人 / =factorize
- 〈C〉『事実』,実際にある(あった)事 / 〈U〉真相,真実(truth) / 《the~》(法律用語で)犯行
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2014/06/14 07:38:48」(JST)
[Wiki en表示]
This article is about the plasmid. For information about the residual factor in crystallography, see R-factor (crystallography). For the racing video game, see rFactor
|
This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009) |
Resistance transfer factor (shortened as R-factor or RTF) is an old name for a plasmid that codes for antibiotic resistance. Often, R-factors code for more than one antibiotic resistance factor: genes that encode resistance to unrelated antibiotics may be carried on a single R-factor, sometimes up to 8 different resistances. Many R-factors can pass from one bacterium to another through bacterial conjugation and are a common means by which antibiotic resistance spreads between bacterial species, genera and even families. For example RP1, a plasmid that encodes resistance to ampicillin, tetracycline and kanamycin originated in a species of Pseudomonas, from the Family Pseudomonadaceae, but can also be maintained in bacteria belonging to the family Enterobacteriaceae, such as Escherichia coli.
Transmission
Bacteria containing F-factors (said to be "F+") have the capability for horizontal gene transfer; they can construct a sex pilus, which emerges from the donor bacterium and ensnares the recipient bacterium, draws it in, and eventually triggers the formation of a mating bridge, merging the cytoplasms of two bacteria via a controlled pore. This pore allows the transfer of genetic material, such as a plasmid. Conjugation allows two bacteria, not necessarily from the same species, to transfer genetic material one way. Since many R-factors contain F-plasmids, antibiotic resistance can be easily spread among a population of bacteria. Also, R-factors can be taken up by "DNA pumps" in their membranes via transformation, or less commonly through viral mediated transduction, although conjugation is the most common means of antibiotic resistance spread.
UpToDate Contents
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English Journal
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- Sghaier I1, Zidi S2, Mouelhi L3, Dabbech R3, Ghazouani E4, Brochot E5, Stayoussef M6, Yacoubi-Loueslati B2.
- Gene.Gene.2015 Sep 1;568(2):140-5. doi: 10.1016/j.gene.2015.05.029. Epub 2015 May 14.
- The present study was undertaken to investigate the association between Hepatitis B Virus (HBV) infection and polymorphisms of tumour necrosis factor alpha TNF-α -308 G>A, TNF-α -238 G>A and TNF RII VNTR (p75) gene promoter in a Tunisian population. Blood samples were collected from 100 Tuni
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Japanese Journal
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- IEEJ Journal of Industry Applications 3(1), 35-40, 2014
- … To achieve this, it is necessary to improve the transmission efficiency of the coils used in wireless power transfer, that is, to improve the quality factor and coupling coefficient of the coils. … To improve the quality factor of the coils, the authors propose the use of a litz wire with a magnetoplated wire (MPW), which is a copper wire plated with a thin iron film. …
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- Jpn J Appl Phys 52(12), 125103-125103-4, 2013-12-25
- … The optical transmittance was found to be 87% at a wavelength of 550 nm, while the sheet resistance was measured to be 28 \pm 7.9 \Omega/square. … The device characteristics of OSCs prepared on the hybrid films include an open circuit voltage of 0.58 V, a short circuit current of 8.05 mA/cm<sup>2</sup>, a fill factor of 51%, and a power conversion efficiency (PCE) of 2.38%. … This improvement can be attributed to the reduced sheet resistance of the hybrid film. …
- NAID 40019923867
Related Links
- resistance factor n. See R factor. ... The AASHTO Highway Subcommittee on Bridges and Structures maintains the Load and Resistance Factor Design (LRFD) Specifications for Bridges as part of its responsibility to design and ...
- 53:134 Structural Design II Load and Resistance Factor Design (LRFD) Specifications and Building Codes: • Structural steel design of buildings in the US is principally based on the specifications of the American Institute of Steel ...
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★リンクテーブル★
[★]
- 英
- resistance factor
- 関
- R因子、Rプラスミド
[★]
R因子
- 関
- R plasmid、resistance factor
[★]
- 関
- actual、actually、in fact、in practice、indeed、practically
[★]
- 関
- element、elementary、factorial、parameter
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