a new biological active hexapeptide of c-terminal of nocistatin, contains glu-gln-lys-gln-leu-gln sequence was synthesized according to solid phase peptide synthesis on the surface of 2-chloro tritylchloride resin and using fmoc-protected amino acids in the presence of tbtu (o-(benzotriazol-1-yl)-n,n,n',n'-tetramethyl uranium tetrafluoroborate) as a coupling reagent. then, amidation o...

Hyperbranched polymer is a kind of with three-dimensional structure, which contains highly branched structure and large number modified terminal functional groups. The desired properties can be obtained by modifying the active end groups appropriately. polymers have been successfully used in development oilfield chemicals due to their excellent solubility, rheology, temperature resistance, salt...

An in-depth analysis of the kinetics collision between freely rising oil droplets in water range Re = 4.64–463.3 was carried out to understand physical mechanism and detailed interaction wall. The results show that when with ≥ 27.8 hit wall vertically at terminal velocities, a “dimple-like” film is formed near wall, which significantly affects pressure distribution within film, oil–water interf...

the essential oils obtained from fresh fruits and terminal branchlets with adherent leaves of cupressus sempervirens l. cv. cereiformis rehd. growing in iran, were analyzed by gc-ms, and screened for bacteriostatic and fungistatic activities. thirteen components were identified in the essential oils. the main constituents of both fruits and leaves were ?-pinene, æ-3-carene, ?-terpenyl acetate a...

A worker developed angiosarcoma, porphyria cutanea tarda, and skin lesions characteristic of mild chloracne. About 10 years earlier he had been employed at a truck terminal in Saint Louis, Missouri, at a time when it was sprayed with waste oil contaminated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). The occurrence of these three rare conditions in a single exposed worker supports the aetio...

The Deepwater Horizon semi-submersible Mobile Offshore Drilling Unit (MODU), leased to BP (previously British Petroleum, now simply “BP”, with the previously-used promotional tagline of “beyond petroleum”) suffered an explosive “blowout” on April 20, 2010 which resulted in what is now the largest offshore oil spill in United States (U.S.) history, and currently estimated to be at least the seco...