for any group g, let c(g) denote the set of centralizers of g.we say that a group g has n centralizers (g is a cn-group) if |c(g)| = n.in this note, we prove that every finite cn-group with n ≤ 21 is soluble andthis estimate is sharp. moreover, we prove that every finite cn-group with|g| < 30n+1519 is non-nilpotent soluble. this result gives a partial answer to aconjecture raised by a. ashrafi in ...

Context. The isotopic ratio of nitrogen presents a wide range values in the Solar System: from ~140 meteorites and comets to 441 solar wind. In star-forming systems, we observe even higher spread ~150–1000. origin these differences is still unclear. Aims. Chemical reactions gas phase are one possible processes that could modify 14 N/ 15 N ratio. We aim investigate if how passage shock wave inte...

Circuits from the Lab® reference designs are engineered and tested for quick and easy system integration to help solve today’s analog, mixed-signal, and RF design challenges. For more information and/or support, visit www.analog.com/CN0349. Devices Connected/Referenced AD5934 250 kSPS, 12-Bit Impedance Converter Network Analyzer AD8606 Precision, Low Noise, RailtoRail Input/Output, CMOS, Op Amp...

We describe the synthesis of a cyapho(dicyano)methanide salt, [K(18-crown-6)][C(CN)2(CP)], from reaction [Na(18-crown-6)][PH2] (18-crown-6=1,4,7,10,13,16-hexaoxacyclooctadecane) with 1,1-diethoxy-2,2-dicyanoethylene (EtO)2C=C(CN)2. The proceeds through Michael addition-elimination pathway to afford [Na(18-crown-6)][HP{C(OEt)=C(CN)2}]. Addition strong, non-nucleophilic base (KHMDS) this intermed...

ABSTRACT Comet 2I/Borisov is the first true interstellar comet discovered. Here, we present results from observational programs at two Indian observatories, 2 m Himalayan Chandra Telescope Astronomical Observatory, Hanle (HCT) and 1.2 telescope Mount Abu Infrared Observatory (MIRO). Two epochs of imaging spectroscopy were carried out HCT three MIRO. We found CN to be dominant molecular emission...

In this work, we carry out the experiments on an atmospheric-pressure premixed methane and air microwave plasma discharge combustion with to study morphology, spatial distribution of species, temperature characteristics for various power values methane-to-air equivalent ratios (&lt;i&gt;Φ&lt;/i&gt;) at a series measurement positions. The experimental results show that ratio 0.4 corresponds limi...

Toxic shock syndrome toxin-1 (TSST-1) producing strains of Staphylococcus aureus isolated from 18 patients with toxic shock syndrome (TSS) and from 56 patients with other diagnoses were compared for capacity to interact with various serum and connective tissue proteins. TSS associated isolates showed significantly stronger binding of Type-I collagen (Cn-I) and Cn-II than non-TSS strains, in a p...

Performance, digestibility of nutrients, microbial nitrogen flow (MNF) and nitrogen efficiency (NE) inearly lactating Holstein cows were investigated by diet supplementation with sodium caseinate (CN).Multiparous lactating Holstein cows (n = 15) with an average body weight of 638 kg and 21 days in milkwere assigned to a completely randomized design (five cows per treatment) and fed a basal diet...