The effect of Ultra-Violet (UV) irradiation and acridine orange dye on L-glutamic acid producing Bacillus subtilis B. megaterium was investigated. selected mutant strains wild types were immobilized used for production. exposed to UV treated with respectively. survived found reduce as the exposure time concentration mutagens increased in this study. Four mutants two Mutant strain (MAIR4) yielde...

The polarity of polyurethane coats was studied on the basis of the goniometric method for determination of wetting angle values, on the basis of calculated surface free energy (SFE) values by the van Oss-Good and Owens-Wendt methods, and on the basis of polarity measurements with the use of the (1)H NMR spectra. Test polyurethanes were synthesised in the reaction of methylene diphenyl 4,4'-diis...

(Re)processing of cross-linked polyurethanes (PUs) is often energy intensive and inefficient since dissociation urethane linkages at elevated temperatures generates highly reactive isocyanate moieties that can react with a wide range nucleophiles. In this study, we first show small molecule study the introduction N-sulfonyl bonds leads to dynamic covalent exchange reactions under much milder co...

In this paper the effects of adding an extra layer within a sandwich panel and coretypes in top and bottom cores on quasistatic loading are studied experimentally. The panel includes polymer composite laminated sheets for faces and the internal laminated sheet called extra layer sheet, and two types of crushable foams are selected as the core material. Quasistatic tests were done by ZWICK testi...

In the study, the possible effect of sodium valproate (NaVP) on urethane-induced lung tumors in mice has been evaluated. BALB/c mice (n = 120; 4-6 weeks old, both sexes) were used in the following groups: 1) urethane-treated, 2) urethane-NaVP-treated, 3) only NaVP-treated, 4) control. In the same groups, castrated male mice (n = 48) were investigated. Urethane was given by intraperitoneal injec...

This article provides more experimental details and findings of the study as to how the elasticity of scaffold material modulates the gene expression of annulus fibrosus-derived stem cells (AFSCs) (Zhu et al., 2015 [1]). The detailed synthetic route and characterizations of four kinds of biodegradable poly(ether carbonate urethane)ureas (PECUUs) are described. After AFSCs were cultured on elect...