Gelatinous material

Many species may, under appropriate circumstances, become surrounded by gelatinous material that provides a means of attachment and some protection from other organisms. If many cells share the same gelatinous covering, it is called a slime otheiwise each is said to have a capsule. 

Penn, J. H. and Murray, G. A. W., Effect of Acidic Gelatinous Materials on Pitting Corrosion of Aluminium Hollow-ware , Br. Corros. J., 2, 193 (1967)... 

On occasion, gelatinous material is apparent in time it usually dissolves or swells greatly. 

Several cleaning methods are used to remove the densified gel layer of retained material from the membrane surface. Alkaline solutions followed by hot detergent solutions are indicated for organic polymer colloids and gelatinous materials fouling. Ferrous deposits, t3 pical in water treatments, are usually removed with a citric or hydrochloric wash. [35]. 

The high specificity required for the analysis of physiological fluids often necessitates the incorporation of permselective membranes between the sample and the sensor. A typical configuration is presented in Fig. 7, where the membrane system comprises three distinct layers. The outer membrane. A, which encounters the sample solution is indicated by the dashed lines. It most commonly serves to eliminate high molecular weight interferences, such as other enzymes and proteins. The substrate, S, and other small molecules are allowed to enter the enzyme layer, B, which typically consist of a gelatinous material or a porous solid support. The immobilized enzyme catalyzes the conversion of substrate, S, to product, P. The substrate, product or a cofactor may be the species detected electrochemically. In many cases the electrochemical sensor may be prone to interferences and a permselective membrane, C, is required. The response time and sensitivity of the enzyme electrode will depend on the rate of permeation through layers A, B and C the kinetics of enzymatic conversion as well as the charac-... 

Polymonoallylamine, crosslinked or uncrosslinked ligno-sulfonate, condensed naphthalene sulfonate, or sulfonated vinyl aromatic polymer components react with each other in the presence of water to produce a gelatinous material [1510,1511]... 

Slaked lime, Ca(OH)2, and aluminum sulfate, Al2 (S04) 3, react to form aluminum hydroxide, Al(OH)3, which forms a gelatinous material used to capture impurities. 

Beryllium hydroxide, [CAS 13327-32-7], Be(OH)2 is precipitated as an amorphous, gelatinous material by addition of ammonia or alkali to a solution of a beryllium salt at slightly basic pH values. A pure hydroxide can be prepared by pressure hydrolysis of a sluriy of beryllium basic carbonate in water at 165°C. All forms of beryllium hydroxide begin to decompose in air or water to beryllium oxide at 190c C. 

Another way is to entrap cells within porous matrices formed in situ. Various gelatinous materials such as acrylamide, alginate, collagen and K-carrageenan, can be mixed with cell suspensions and be gelled into various shape and sizes. 

If the compositions comprise particles as large as 0.2 micrometers, it is preferred to use a digestion procedure. The digestion procedure is not necessarily ideal for silver compositions that may have been manufactured or stored in contact with halides or other anionic species that may react with finely divided silver, or combined with protein or other gelatinous material. An embodiment of the digestion procedure is as follows ... 

The diazo solution may be stored as long as 1 day at 10-15°. The insoluble gelatinous material that forms during storage should be removed by filtration just before use. The filter flask used at this point should be cooled in an ice bath to prevent further decomposition of diazo solution. 

Form Fit Oasis Long term/ reversible One size fits all Made of a hydrogel that forms a gelatinous material when in contact with tears gel fiUs vertical portion of canaliculus... 

Check the sample solution for particulate material. If insoluble silicate (white, gelatinous materials) or other particles are noted, centrifuge or filter the solution through a glass fibre filter before loading the sample onto the preconditioned column. This step is important in order to maintain a continuous flow of the sample solution through the column. 

A better, versatile, and rapid method is the preparation of films of raw gelatin material (according to the formula for hard or soft gelatin capsules) and... 

Iron oxides have been reported to make hard gelatin capsules brittle at higher temperatures when the residual moisture is 11-12%. This factor affects the use of iron oxides for coloring hard gelatin capsules, and will limit the amount that can be incorporated into the gelatin material. 

Silica (Si02) is the acid anhydride of the very weak silicic acid H2Si03, a gelatinous material that is insoluble in water but readily dissolves in strongly basic aqueous solutions according to... 

Whereas meconium is more easily collected from newborns than urine, it is considerably more difficult to analyze. Meconium is a heterogeneous, gelatinous material from which drugs must be extracted before analysis by immunoassay and confirmation by GC-MS.It should be noted that drug extraction fi om meconium using inorganic acids, methanol, or any other alcohol is protected by U.S. patents. ""- ... 

Magnesium hydroxide is a gelatinous material that forms during the water purification process in some water treatment plants because of magnesium ions in the water,... 

Agar is a gelatinous material obtained from algae. 

Ionic impurities are adsorbed on the surface of the catalyst precursor, especially on gelatinous material with high surface area. Water washing with up to several hundred times more than the amount of solid may not be sufficient to remove the impurities to the desired... 

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