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[1] [2] [3] In a dynamic sense, the response of a gel to an alternating force (oscillation or vibration) will depend upon the period or frequency of vibration. As indicated here, even most simple liquids will exhibit some elastic response at shear rates or frequencies exceeding 5 x 10 6 cycles per second. Experiments on such short time scales ...
Yitzhak Apeloig (Hebrew: יצחק אפלויג; born 1 September 1944 in Uzbekistan [2]) is a pioneer in the computational chemistry field of the Ab initio quantum chemistry methods for predicting and preparing the physical and chemical properties of materials. [3]
Tovex is a 50/50 aqueous solution of ammonium nitrate and methylammonium nitrate (sometimes also called monomethylamine nitrate, or PR-M), sensitized fuels, and other ingredients including sodium nitrate prills, finely divided (paint-grade) aluminum, finely divided coal, proprietary materials to make some grades cap sensitive, and thickening agents to enhance water resistance and to act as ...
Bloom is a test used to measure the strength of a gel, most commonly gelatin.The test was originally developed and patented in 1925 by Oscar T. Bloom. [1] The test determines the weight in grams needed by a specified plunger (normally with a diameter of 0.5 inch) to depress the surface of the gel by 4 mm without breaking it at a specified temperature. [2]
At that point in the reaction, which is defined as gel point, the system loses fluidity and viscosity becomes very large. The onset of gelation, or gel point, is accompanied by a sudden increase in viscosity. [3] This "infinite" sized polymer is called the gel or network, which does not dissolve in the solvent, but can swell in it. [4]
Clindamycin/tretinoin is a topical gel used in the treatment of acne. The two active ingredients are the antibiotic clindamycin phosphate (1.2%) and tretinoin (0.025%), a retinoid . [ 1 ] The two active ingredients perform different functions, the clindamycin is active against gram-positive bacteria, including streptococci and penicillin ...
Precipitated silica is an amorphous form of silica (silicon dioxide, SiO 2); it is a white, powdery material. Precipitated silica is produced by precipitation from a solution containing silicate salts. The three main classes of amorphous silica are pyrogenic silica, precipitated silica and silica gel.
The early 1950s sought a need for a center of aeronautical research in Israel. [2] In 1950, Sydney Goldstein accepted the chairmanship of the department of mathematics at Technion. [3] The faculty was established in 1954 after Goldstein persuaded the President of the Technion, Yaakov Dori, and Prime Minister David Ben Gurion. The department ...