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Paper chromatography
| Oil glossary |
A method which involves placing a drop of fluid on a permeable piece of paper and noting the development and nature of the halos, or rings, surrounding the drop through time. the roots of this test can be traced to the 1940s, when railroads used the "blotter spot" tests.
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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.
Pap, английский
- Pulmonary artery pressure
- Password authentication protocol
- Pierced aluminum plank
- Project aerospace plane
- A downward outlet from an eaves gutter. paper-backed lath any lath having a paper backing.
- Payables automation project
Pap, английский
Pulmonary artery pressure
Pap, английский
Pap, испанский
Acrónimo de password authentication protocol [protocolo de autentificación de palabra de paso] este protocolo emplea contraseñas o 'passwords' de texto simple y, por ello, no es nada sofisticado.
Pap smear, английский
- Papanicolau, citología
- Papanicolau; citología (con tinción de papanicolau)
Pap test, английский
Same as papanicolaou test
Pap – pup, английский
Maize porridge, a staple for many south africans it can be eaten as breakfast, lunch or supper. often accompanies a braai.
Papírosztály, венгерский
Papírzsebkendő, венгерский
Papĭlio, латинский
Papa, английский
- Prepare to abandon platform alarm
- Nato phonetic notation for the letter “p.”
- Parallax airplane parking aid (vdgs)
Papa, английский
Papa, итальянский
Papa, русский
Papa / patata frita, испанский
Papa [ae, m], латинский
Papa [ae, m] (romanus), pontifex [icis, m], латинский
Papa, patata, испанский
Papacostas, английский
Papacy, pontificate, английский
Development, английский
- Разработка; доводка
- Разработка; развитие; проявление
- Разработка; отработка; отладка; вариант; модификация
- Вариант; развитие (изобретения)
- 1. the process of growing, or of becoming larger and stronger, or more complex the development of the embryo takes place in the uterus. 2. something which happens and causes a change in a situation report any developments to me at once.
- N развитие cognitive ~ когнитивное развитие
- Министерство жилищного строительства и городского развития (сша)
- Property under construction, including preparation and installation of infrastructure
- Any computer code or materials, other than products, fixes or preexisting work, developed by microsoft or in collaboration with customer, which is provided to customer in the course of performance of a statement of services.
- Разработка (месторождения).
- Event, happening, occurrence
- Event, happening, occurrence something that has happened, or the act of making or improving something
- The evolution of something an individual is working on. personal qualities, mental well-being, or useful skills can all be developed and improved.
Surrounding, английский
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Paraffinic, английский
- A type of petroleum fluid derived from paraffinic crude oil and containing a high proportion of straight chain saturated hydrocarbons. often susceptible to cold flow problems.
- Waxy or “sweet” crude oil. it is the most common type of base oil in production. it has a poor pour point due to the tendency to form wax molecule chains. it typically has excellent oxidation stability and a high viscosity index.
- Having the characteristics of paraffins, saturated hydrocarbons of open chain structure.
Pao synthetic fluid, английский
Polyalphaolefins, often called synthetic hydrocarbons, are probably the most common type of synthetic base oil used today. they are moderately priced, provide excellent performance and have few negative attributes. pao base oil is similar to mineral oil. the advantage comes from the fact that it is built, rather than extracted and modified, making it more pure. practically all of the oil molecules are the same shape and size and are completely saturated. the potential benefits of paos are improved oxidative and thermal stability, excellent demulsibility and hydrolytic stability, a high vi, and very low pour point. most of the properties make paos a good selection for temperature extremes – both high operating temperatures and low start-up temperatures. typical applications for paos are engine oils, gear oils and compressor oils. the negative attributes of paos are the price and poor solubility. the low inherent solubility of paos creates problems for formulators when it comes to dissolving additives. likewise, paos cannot suspend potential varnish-forming degradation by-products, although they are less prone to create such material.
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