The Adsorptivity of Charged and Uncharged Cellulose Ethers
E. Desmond Goddard, James V. Gruber in Principles of Polymer Science and Technology in Cosmetics and Personal Care, 1999
the resultant sorption value of JR-125 is close to that observed on addition of SDS, which in this case leads to a drop in uptake equal to that caused by CTAB. It is of interest that sorption values of HEC, Polymer JR-30M, and Polymer JR-125 in are all close and approximate a value required for monolayer coverage. The sorption isotherm for Polymer JR-400 on rayon is included in Figure 6. As with hair, no evidence of a sorption plateau was obtained, and conformance with Freundlich behavior was found. Nylon
HLA-DR and -DQ Serotyping
M. Kam, Jeffrey L. Bidwell in Handbook of HLA TYPING TECHNIQUES, 2020
The majority of laboratories in the U.K. carrying out serological typing for class II antigens currently use immunomagnetic beads to separate out HLA-DR positive cells. This method is preferred because it can consistently produce typeable B cell preparations from blood samples from patients. Nylon wool and SRBC methods for obtaining B cells can produce satisfactory results, but result in more HLA class II typing failures with patient samples than do the immunomagnetic beads. A particular drawback of the SRBC technique is that B cells are not positively selected. The greater success rate for immunomagnetic beads counterbalances the higher cost of reagents and equipment required to carry out this technique as compared to the nylon wool and SRBC methods.
Housekeeping and the Environment
William C. Beck, Ralph H. Meyer in The Health Care Environment: The User’s Viewpoint, 2019
If redecorating is to be done every 5 years there is no need to buy more than the minimum height pile with the right type of fiber. If the carpeting is to last as long as possible, which is about 10 years, then it should have a higher pile. The nylon fibers clean very easily, but, unfortunately, are also soiled more readily than some other fibers. The best type to use is a nylon fiber with the static and dirt resistant chemical added. Carts are harder to push on deeper pile carpeting. In areas where carts will be used a great deal this should be remembered. If elevators are to be carpeted the carpet should be fit tightly to the sides but be removable as it will as a rule have to be cleaned more than any other carpet. Wool carpeting is still used in some deluxe facilities, but it is more expensive, cannot be cleaned as easily as nylon and must be treated for static. The acrylic fibers look much like wool and are the choice of most achitects and decorators because they resemble wool. They have less static than wool, soil more quickly, and do not have the wearing qualities needed for frequent shampooing. Some have been known to disintegrate when certain germicides are used in the shampoo.
Facts and ideas from anywhere
Published in Baylor University Medical Center Proceedings, 2019
William Roberts
Polymers appeared in 1907 when Belgian émigré Leo Baekeland (1863–1944) cooked up Bakelite, the first fully developed synthetic polymer, made entirely of molecules not found in nature. The dawn of plastics could be considered 1941, when, shortly after the bombing of Pearl Harbor, the director of the board responsible for provisioning the American military advocated the substitution, whenever possible, of plastics for aluminum, brass, and other strategic metals. World War II pulled polymer chemistry out of the lab and into real life. Many of the plastics that we know—polypropylene, nylon, acrylic, Styrofoam—got their first use during the war. By the end of the war, it was apparent that plastics could be used for nearly everything. After World War II, they began entering our homes, our cars, our clothes, our playthings, our workplaces, and even our bodies. They challenged traditional materials and won, taking the place of steel in cars, paper in glass and packaging, and wood in furniture. Ethylene gas, a byproduct of oil refineries, as a British chemist discovered in the early 1930s, could make polyethylene usable in packaging. Another byproduct, propylene, is now used in yogurt cups, microwaveable dishes, disposable diapers, and cars. Acrylonitrile could be made into acrylic fiber and into AstroTurf.
Microplastics and nanoplastics science: collecting and characterizing airborne microplastics in fine particulate matter
Published in Nanotoxicology, 2021
Luna Rahman, Gary Mallach, Ryan Kulka, Sabina Halappanavar
Personal, outdoor and indoor air samples collected on Teflon filters were extracted and prepared for MP detection by Raman as described above. A large variety of MP polymers <2.5 μm, including MP <1 μm were observed in one personal air sample and several ambient outdoor samples. These polymers include, Nylon fibers, particles of PP, PE, CPE, styrene copolymer, polyvinyl chloride (PVC) packaging formulation, and polyurethane (PUR) contaminated with Flex blue (especially rubber containing blue dye). Nylon was present in almost all samples (Figure 8, Supplementary Figure 7). The presence of carbonaceous materials was low in these samples, which facilitated the easy identification of plastic polymers.
Nanoencapsulation of R-phycoerytrin extracted from Solieria filiformis improves protein stability and enables its biological application as a fluorescent dye
Published in Journal of Microencapsulation, 2023
Jéssica Roberta Pereira Martins, Antonia Livânia Linhares de Aguiar, Karina Alexandre Barros Nogueira, Acrisio José Uchôa Bastos Filho, Thais da Silva Moreira, Márjory Lima Holanda Araújo, Claudia Pessoa, Josimar O. Eloy, Ivanildo José da Silva Junior, Raquel Petrilli
The wet macroalgae were crushed in an industrial blender for 20 min in contact with 0.025 M potassium phosphate buffer (PBS), pH 6.5, at 1:3 (macroalgae:buffer; w/v) and kept under mechanical agitation in an ultra turrax t25 homogeniser for 6 h, protected from light. Subsequently, the homogenate was filtered through fine nylon fabric. The solid residue was discarded, and the filtrate was centrifuged at 17 000 × g, 4 °C for 30 min. The supernatant obtained was called Solieria filiformis total protein extract. The recovery of R-PE was considered 100%, as it is the first stage of pigment purification (Harnedy and FitzGerald 2013).
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