Protective liquid

The API Code RP-520 [33a] suggests the following to determine the liquid expansion rate to protect liquid-filled (full) systems or locations where liquid could be trapped in parts of a system or an area could be subject to blockage by process or operational accident. When thermal input from any source can/could cause thermal expansion of the enclosed liquid ... 

The nematic nanoparticies have been prepared by a two step synthetic process. First, gold nanopartides are covered with an alkylthiol monolayer (hexyl- and dodecylthiol) in a second step, the alkylthiol-nanoparticles are reacted with the functionalized thiol mesogen in dichloromethane at room temperature to obtain the monolayer-protected liquid crystal gold nanopartides. These materials are chemically stable and display a nematic mesophase at room temperature [67, 68]. Other examples include liquid crystal gold nanopartides functionalized by hexaalkoxy-substituted triphenylene [69]. 

Failure of preservative systems to protect liquid products,... 

Acrolein at a concentration of <500 ppm is also used to protect liquid fuels against microorganisms. 

Shen, G. and H.K. Lee (2002). Hollow fiber-protected liquid-phase microextraction of triazine herbicides. Anal. Chem., 74(3) 648-654. 

Protection provided provides same level of respiratory protection as level A, but somewhat less skin protection liquid splash protection is provided, but not protection against chemical vapors or gases... 

Protection provided the same level of skin protection as level B, but a lower level of respiratory protection liquid splash protection but no protection to chemical vapors or gases... 

Lee, H.S.N., M.T. Sng, C. Basheer, and H.K. Lee. 2007. Determination of degradation products of chemical warfare agents in water using hollow fibre-protected liquid-phase microextraction with in situ deri-vatisation followed by gas chromatography-mass spectrometry. J. Chromatogr. A 1148 8-15. 

Ouyang, G. and J. Pawliszyn. 2006. Kinetic calibration for automated hollow fiber-protected liquid-... 

An electrical apparatus or component which is not capable of igniting a gas-air mixture in normal operation, e.g. a transformer or a reactor, can be explosion protected by immersion in mineral oil or in another corresponding protective liquid in such a way that an explosive atmosphere inside the apparatus above the level of the protective liquid or outside the enclosure of the o-apparatus cannot be ignited. 

Acrolein at a concentration of <500 ppm is also used to protect liquid fuels against microorganisms. The dialkyl acetals of acrolein are also usefiil in this application. In addition, the growth of algae, aquatic weeds, and mollusks in recirculating process water systems is also controlled by acrolein. 

One of the primary methods used for protecting liquid and solid photolabile pharmaceuticals and preparations from photodegradation is to package them in colored glass or plastic. Colored/pigmented containers are also suitable for the photostabilization of sterile preparations, such as eye drops. 

Use Against the Disabled. The use of personal protection liquid irritant sprays by police and hospital security personnel to subdue clearly mentally ill patients is totally... 

Lithium can be weighed and handled without any danger. It is usually delivered in cylindrical sticks of 1 to 1.5 cm in diameter. After complete removal of the protective liquid with a tissue, the required amount of metal is cut off and subsequently flattened with a hammer on a clean surface (e.g. iron block) to a thickness of a few mm. Using scissors, the flattened piece is then cut into chips. If a... 

With distal progression, the protective liquid lining diminishes and clearance rates slow down. Soluble compounds as well as some poorly soluble ultrafine particles may cross the air-liquid interface to enter the tissues and the blood especially in the alveolar region. Depending on the solubility of the particle retention may take years. Alveolar clearance is not a linear process and half live increases with the elimination time. 

As current antiseptic, to protect liquids during the course of digestion against all microbic interference, thymol is used with success, also xylol, toluol, and chloroform. Van de Velde proposes a solution of 10 per cent chloroform in acetone for the same purpose, using 100 g. per liter of liquid to be digested. 

The plugs have caused no problems during initial 2 or 3 years of operation. On the basis of the feedback from BN350 and taking into account the experience gained at the BN600 reactor from the monitoring of the protective liquid and hydraulic seal eutectic the former was decided to be periodically replaced and cleaned to remove mechanical impurities. 

At present time the protective liquid is replaced once a year in accordance with the reactor maintenance schedule. Up to 1994 pre-operation driving of the rotating plugs caused no major problems - it used to take a number of hours and the time was spent mostly to better heat up the eutectic. Since the autumn... 

Chen P-S, Huang S-D. Determination of ethoprop, diazinon, disulfoton and fenthion using dynamic hollow fiber-protected liquid-phase microextraction coupled with gas chromatogra-phy-mass spectrometry. Talanta 2006 69 669-675. 

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