A dual-resonance model for the K+K−p $$\overline n $$ π− system with application to the reactions K+p → K+π+n, K+n → K+π−p and K−n → K−π−pπ− system with application to the reactions K+p → K+π+n, K+n → K+π−p and K−n → K−π−p

Tris(2-sulfidopyridine N-oxide-O,S)chromium(III) Acetone Solvate (1/1)

“…The structure of the Cr(mpo)3 unit of the title compound ( Fig. 1) is quite similar to that of Cr(mtb)3 (mtb = N-methylthiobenzohydroxamate) and the average Cr--S and Cr--O bond distances [2.363 (1) and 1.986(2),Ji, respectively] agree well with those of Cr(mtb)3 [2.367 (8), 1.976 (6) A; Freyberg, Abu-Dari & Raymond, 1979]. The coordination about the Cr atom is distorted from regular octahedral, with an average bite angle of 83.3 (1) ° due to the limited bite distance (average 2.903 A) of the ligand.…”

Cold-tolerant phosphate-solubilizing Pseudomonas strains promote wheat growth and yield by improving soil phosphorous (P) nutrition status

“…Acidification via OA production is considered one most important mechanisms of P solubilization (Upadhayay et al, 2022). PSMs produce numerous organic acids that are reported to solubilize inorganic P in the medium including citric (pKa = 2.93 ± 0.28), oxalic (pKa = 1.38 ± 0.54), glycolic (pKa = 3.74 ± 0.11), and gluconic acids (pKa = 3.35 ± 0.35) (Halder et al, 1990;Akintokun et al, 2007;Patel et al, 2008;and Puente et al, 2009). In our study, two organic acids were detected during P solubilization via ESI-MS analysis (Figure 11), and these were maleic acid with an m/z value of 115.08 and citric acid with an m/z value of 191.…”

The lower symmetry electron-density distribution and the charge transport anisotropy in cubic dodecaboride LuB12

“…Dodecaborides RB 12 (R = Y, Zr, Tb-Lu) possess unique combination of charge-transport, magnetic, thermal and mechanical properties [1] and have a simple fcc structure, which is similar to NaCl when sodium and chlorine atoms are replaced by the metal atoms and centers of regular cuboctahedra B 12 , respectively (figure 1(a)). The metal cations center octa hedral cavities formed by closely packed anionic groups B 12 .…”

“…Owing to the simple structure, dodecaborides RB 12 (LuB 12 in this number) are excellent models to study anomalies of various physical properties of the metal-like compounds [2][3][4]. Structural symmetry of RB 12 (R = Y, Zr, Tb-Lu) is determined as cubic Fm 3m [1]. ScB 12 falls out from this family, since its structure at normal conditions is determined by some researchers as cubic [5] but by other ones as tetragonal [6,7].…”

“…Tetragonal distortions a ∼ = b = c over the temperature range 90-300 K, more pronounced below 150 K, have been revealed in LuB 12 . It is interesting that according to [1] the parameters yield to the formula a ∼ = b < c whereas the study [15] shows that a ∼ = b > c is more appropriate. Reliable estimate is a demanding task because of an extremely small difference between these parameters that does not exceed 0.002-0.003 Å in the temperature interval.…”