Silica gel

Dogs are domestic pets living in our household; they have various personal care issues to be taken care of similar to ours. Hair are a safety layer provided to our dog buddies to keep them safe from sizzling sun, chilly cold, snow, heavy rain showers, dust, environmental and artificial dirt, mite's, ticks and other dangerous insects. Too much hair left uncut may lead to skin rashes, comfort, and scratches. These scrapes become cuts and wounds attracting insects as mites and ticks to the dog's…

The resulting mixture was quenched by adding water and extracted with methylene chloride. The combined organic layers were washed with brine, dried over anhydrous Na2SO4, and filtered. After removing the solvent, the crude product was purified by silica gel chromatography by using hexane/CH2Cl2 (4:1) as the eluent to afford the title compound as yellow solid (1.23 g, 76%). 1H NMR (400 MHz, CDCl3): δ 8.55 (s, 2H), 8.44 (s, 2H), 8.01 (dd, 2H), 7.76 (dd, 2H), 1.39 (s,…

Physical therapy is a type of treatment that many individuals may need when they are experiencing health problems that make it hard for them to move around or do daily task that they once were able to do on their own. The goal at any Physical therapy center is to help a patient get back to their normal range of motion such as restoring or increasing their flexibility, strength, endurance, coordination, and/or balance. (Physical Therapy) A patient can also be refer to a physical therapist to help…

placed into a mixture of dichloromethane and hexane and allowed to elute. Through capillary action, each solution and the solvent travelled up the TLC plate (Setzer, W., 2008). The solvent travels past each spot on the plate and while the polar silica gel tries to hold the spot in place, the solvent tries to move the spot with it as it travels up the plate. After removed from the solvent, the plate was placed into an iodine chamber in order to be able to visualize the distances the solutions…

in the source materials (Abdullah.M et al., 2011). This will result in a gel that binds aggregates together to form geopolymer concrete, which is normally assisted by the application of heat. Pozzolan is defined as a reactive aluminosilicates, which can be either glassy (natural volcanic glasses or man-made glasses eg: fly ash or silica fume) or poorly crystalline [metakaolin]. Pozzolanic material consists of reactive silica and alumina, they do not harden when mixed in water but react with…

between a stationary and mobile phase. HPLC (High Performace Liqud Chromatography) is a vast system which involves the use of a mobile and stationary phase to separate materials. The stationary phase is usually a column packed with solids (usually silica gel) while the mobile phase is usually a solvent or a mixture of various solvents. The mobile phase usually, is the carrier of test sample which has to be completely soluble/dissolved in the mobile phase. This mixture is then made to flow…

The existing storage environment and furniture are located in a semi-secure classroom located in Carnahan Hall on the Southeast Missouri State University campus. Presently most of the Jaycees Collection is stored in cardboard boxes whereas some artifacts are not due to their size. The collection is located on the shelving in the back of the classroom. The temperature of the room where the collection is currently housed is controlled by a central thermostat of the building and is impacted by the…

Silver nitrate test was used in an additional step to verify the final product of the bromination reaction. TLC was performed on a sheet of glass coated with a thin layer of silica gel. On this layer of adsorbent, known as the stationary phase, the solvent mixture, the mobile phase, was added. The solvent mixture moved up the plate via capillary action. Considering different analytes ascend the TLC plate at different rates, due…

For the preparation of TLC plates, 20 x 15 x 5 glass plates were properly washed and coated with silica gel (Merck) of 0.5mm thickness. The coated plates were activated by incubating at 100ºC for 3h prior to use. The sample and positive control (Vinblastine, Sigma, 1mg/ml) were spotted on to activated TLC plate just 1cm above the subordinate edge of plate…

3 RESULTS AND DISCUSSION 3.1 Water demand and workability of M-S-H binder system 3.1.1 Optimization of superplasticizer M-S-H binder contains high content of very fine silica fume particles and therefore requires much higher water demand than Portland cement (PC) for workability (Zhang et al (2009)). Also, the reactive magnesium oxide particles were found to have cells lattice structure and therefore require higher water demand than PC (Eubank, 1951). For those reasons, tests with…