We show that quantitative information on the electrical deactivation of doping can be obtained by combining the results of positron annihilation, secondary ion-mass spectrometry, and capacitance-voltage measurements. By applying this method to study the N doping of ZnS0.06Se0.94 , we can conclude that the fraction of electrically inactive nitrogen may vary from 0% to 80%, depending strongly on ...

Methods Cardiovascular tissue allografts (CVA) were retrieved from recipients of heart transplants (RHT) and multiorgan donors (MOD) which fulfill donor selection criteria. Processing of CVA was performed in CTB clean room (GMP Class B). Initial processing included surgical dissection, measurements, morphology and functional assessment and collection of quality control samples. CVA were incubat...

The N,N'-dimesitylene substituted o-phenylenediamine 1 reacts with Sn[N(SiMe(3))(2)](2) under formation of the monomeric N-heterocyclic stannylene 2, while the chiral N,N'-substituted o-phenylenediamine 3 reacts with E[N(SiMe(3))(2)](2) (E = Ge, Sn) under formation of the chiral germylene 4 and the chiral stannylene 5, respectively. X-Ray diffraction studies with both stannylenes demonstrated t...

introduction:blood-borne infectious agents are one of the main anxieties of blood transfusion organization in all countries. according to who, the blood healthy and blood safety is included ensuring and monitoring of quality and efficiency for all patients requiring blood transfusion. we at the current study intend that survey prevalence hiv ab, hcv ab, hbs ag among blood donors refer to the bl...

Rhodopseudomonas palustris is a photosynthetic bacterium that can use many forms of carbon, nitrogen, and electron donors. Under anaerobic conditions it can generate energy from light and convert nitrogen gas to ammonia and hydrogen (a biofuel) by nitrogen fixation. A striking feature of the genome sequence of R. palustris CGA009 is genes encoding three different nitrogenases and the accessory ...

Nitrogen assimilation is a critical biological process for the synthesis of biomolecules in Escherichia coli. The central ammonium assimilation network in E. coli converts carbon skeleton α-ketoglutarate and ammonium into glutamate and glutamine, which further serve as nitrogen donors for nitrogen metabolism in the cell. This reaction network involves three enzymes: glutamate dehydrogenase (GDH...

The in vitro lysis of human leukemia cells by human natural killer cells was enhanced by pretreatment of the leukemia cells with two different cytostatic drugs, which by themselves do not cause lysis of the tumor cells within the time limits of the in vitro assay. Actinomycin D induced this higher susceptibility in four of eight leukemic samples, Cisplatin in three of four samples. Using Actino...

BACKGROUND MAdCAM-1 is an adhesion molecule expressed in Peyer's patches and lymphoid tissues which is mobilized by cytokines like TNF-alpha and is a major determinant of lymphocyte trafficking to the gut in human inflammatory bowel disease (IBD). It has been suggested that both reactive oxygen and nitrogen metabolites participate in regulating adhesion molecule expression in response to TNF-al...

The effectiveness of four different electron donors, specifically methanol, ethanol, glycerol, and sulfide (added as Na(2)S), were evaluated in post-denitrifying bench-scale moving bed biofilm reactors (MBBRs). With the requirement for more wastewater treatment plants to reach effluent total nitrogen levels approaching 3 mg/L, alternative electron donors could promote more rapid MBBR startup/ac...

Ninety-seven compounds expected to function as electron donors in charge-transfer complex formation were tested by microscopic fusion methods for formation of solid quinone com plexes. Donor classes included polycyclie hydrocarbons, nitrogen heterocyclics, aromatic amines, aromatic azo compounds, and some miscellaneous compounds. Carcinogenic and noncarcinogenic substances were present in each ...