Polymer aging occurs over time as a result of thermal, oxidative, mechanical, electrical, etc., effects, and can be caused by the breaking of primary chemical bonds in the chain backbone or side groups. From: Polymer, 2014 About this pageSet alert Discover other topics ...
Free radicals are chemical entities that are reactive and have one or more unpaired electrons. Free oxygen radicals play a vital part in our bodies normal functioning [1,2,3]. In vivo, these have been developed as part of metabolism and have little sensitivity, and are capable of attacking ...
This fact is mainly due to -OH groups exposed on the Gd2O3 surface, which are more chemically active under less extreme conditions, this has allowed the formation of chemical bonds to anchor different biomolecules such as APTES [74], DO3A-BTA [89], PMVEMA [10], EG [64], PEG [93],...
Contributors filled in the worksheet the required information regarding the species of their country. Specifically, four columns were used to report the four main questions as in STEP 1 in the SHARP approach (Aronne, 2017): 1) Do plants flower? 2) Are seeds produced? 3) Does seedling recrui...
The types of chemical bonds, involving the adhesion of a coating to a surface, include covalent bonds (such as those between a silane end and an OH-group belonging to a cotton cellulose molecule), molecular attractions (such as Van der Waals forces, hydrogen bonds, dipole–dipole interactions...
Using the donations database on the companion site, and using only people who made a donation in response to the current mailing, consider predicting the amount of a donation (named “Donation_D1” in the worksheet) from the indicator variable that tells if the person is a catalog shopper ...
Under the action of vibration load, the XLPE cable is aged, resulting in the molecular bonds of the material being shifted, and when deformation occurs, some of the molecular chains in XLPE stretch and fracture due to stress. The material hardens and is easily destroyed, and the cable specime...
FTIR is used for the detection of IR-active MPs by irradiation of the samples with infrared radiation and noting the changes in the dipole moments of the structural chemical bonds present in the sample. A comparison of the obtained sample spectrum with reference spectrums provides information ...
Advanced glycation end-products (AGEs) are an assorted group of molecules formed through covalent bonds between a reduced sugar and a free amino group of proteins, lipids, and nucleic acids. Glycation alters their structure and function, leading to impaired cell function. They can be originated by...