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Gel permeation chromatography
| Глоссарий терминов смазочных материалов |
A size-exclusion chromatography method that separates fluid components by molecular weight (e.g., size and shape) (see chromatography). gl-4,5,6 service: transmission and axle lubricants classified according to sae j308.
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Chromatography, английский
- An analytical technique whereby a complex substance is adsorbed on a solid or liquid substrate and progressively eluted by a flow of a substance (the eluant) in which the components of the substance under investigation are differentially soluble. the eluant can be a liquid or a gas. when the substrate is filter paper and the eluant a liquid, a chromatogram of colored bands can be developed by use of indicators. for gas chromatography, electronic detectors are normally used to indicate passage of the various components from the system.
- A method of separating chemicals through a porous medium, used in analysing compounds and mixtures
- Хроматографии
- Хроматография. аналитический метод, применяемый в основном для разделения компонентов пробы путем их распределения между неподвижной (стационарной) и подвижной (мобильной) фазами.-стационарная фаза мажет быть представлена твердым или жидким веществом или гелем и может иметь,форму колонки, тонкого слоя или пленки; подвижная фаза может представлять собой жидкость или газ. в газовой хроматографии (гх) подвижная фаза —газ, щ стационарная фаза —либо жидкость (газожидкостная хро~` з* 35 `chromium —- хром матография, гжх), либо твёрдое вещество (газоадсорбционная хроматография, гах). газовая хроматография, в частности с; электронозахватным детектором, может применяться для определения` такой группы атмосферных загрязнителей, как углеводороды и некоторые хлорированные углеводороды. хроматография с пламенным ионизационным детектором может применяться для определения окиси углерода. см. также flame ionization analysis — пламенно-ионизационный анализ.
- The generic name of a group of processes for separating and analyzing mixtures of chemical compounds. the separation depends on the redistribution of molecules of the mixture between phases, one of which is thin, often reaching molecular dimensions. for this reason, molecular size and shape are important in the separation, and extremely subtle separations are possible. chute-feed system: pneumatic fiber transport system used in linking textile processing equipment or operations, especially opening, blending, and carding. circular-knit fabric: a tubular weft-knit fabric made of a circular-knitting machine.
- A powerful method for analyzing fluids and determining their components by selective adsorption or size exclusion, using liquid or gas as the eluent. in the adsorptive procedure, the substance flows slowly through a column of adsorbent; as different substances pass at different speeds, they separate from each other and can sometimes be isolated and identified. in other cases, the chromatogram (a trace of the signal from the detector) is utilized to fingerprint a lubricant. liquid chromatography is used for lubricants because of their low volatility. paper chromatography, an adsorptive method, is often used to examine or establish the sludge or dispersive characteristics of a lubricant. gel permeation chromatography, a size exclusion method, separates polymeric (oxidized oil/sludge) material from a lubricant base stock by molecular weight.
Components, английский
Комплектующие
Transmission, английский
- Passage of electromagnetic radiation through a medium.
- Transmisión
- The property in a merchantman, or a share therein, transmitted in
- Передача; привод; коробка передач; трансмиссия; прохождение; распространение ~ of loads передача нагрузок
- The transport of high voltage electricity. this is achieved with a transmission network (or grid). generally the network will connect large generators to lower voltage distribution networks where it will be transported to the majority of electricity consumers. alternatively, large scale electricity users may connect directly to the transmission network. management of transmission is a natural monopoly due to the economies of scale inherent to it. transmission system operator (tso) (also transmission network operator-
- The sending of information over a communications line or a circuit.
- The transportation of electric energy in bulk from a source or sources of supply to other systems or parts of a single system.
- Transfer of pathogens from one host to another
Classified, английский
- Секретно
- A general term defining information which must be controlled in the interest of national security. see “confidential,” “secret,” and “top secret.”
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Gland (follower), английский
Adjustable follower that compresses packing in a stuffing box.
Gel (grease), английский
A solid, elastic mixture of a colloid and a liquid possessing a yield point and a jellylike texture.
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