Shoot N concentration in plants decreases as they get bigger, due to the fact that N accumulates less rapidly than dry matter in plants during the plant growth process, leading to an allometric relationship between shoot N content (N(sh)) and shoot mass (W(sh)): N(sh)=a(W(sh))b. The results obtained on lucerne plants growing either under controlled low density conditions or in dense stands unde...

The effect of an additional chromosome 6 upon recombination in chromosome 9 was investigated in maize. Trisomic 6 plants and their disomic sibs, heterozygous for three loci of chromosome 9 (yg, sh and wx), were testcrossed, and recombination in the regions yg-sh and sh-wx was analyzed. Single exchanges in the sh-wx region and double exchanges were more frequent in trisomics, particularly in fem...

—Rapid increase in abundance and expanded distribution of introduced blue catfi sh Ictalurus furcatus populations in the Chesapeake Bay watershed have raised regional management concerns. This study uses information from multiple surveys to examine expansion of blue catfi sh populations and document their role in tidal river communities. Originally stocked in the James, York, and Rappahannock R...

Fatty acid peroxides have been found in the atherosclerotic human aorta. Glavind found a correlation between the extent of the atherosclerotic changes and the content of lipid peroxides. These lipid peroxides are very toxic to the tissues. There are several compounds in the tissues to counteract the toxicity of peroxides in vivo, i.e. SH compounds, ascorbic acid, or tocopherol. · It may be infe...

Mutations of the Shaker (Sh) locus of Drosophila reduce, eliminate, or otherwise alter a transient potassium current, IA, in muscle. Recent molecular studies indicate that the Sh locus produces several proteins by alternative splicing, but the relationships of the variety of Sh gene products to IA channels in the various excitable membranes still remain to be determined. In Drosophila, many enz...

We analytically study second-harmonic (SH) generation from thin metallic films with subwavelength noncentrosymmetric patterns. Because the thickness of the film is much smaller than the SH wavelength, retardation effects are negligible. The far-field SH intensities are thus dominated by an effective electric dipole. It is further demonstrated that internal bulk SH polarization density is compar...

An interesting aminosilanetrithiol RSi(SH)3 (R = N(SiMe3)-2,6-iPr2C6H3) has been prepared by the reaction of lithium aminosilanetrithiolate {RSi[SLi(THF)]3}2 with MeCOOH. Theoretical calculations indicate that the LP(N) → σ*(Si-S) and LP(S) → σ*(Si-S) electron donations remarkably contribute to the stabilization of the Si(SH)3 part of the molecule. RSi(SH)3 is the first example of a stable mole...

The functionalization of elastomers by phosphonate groups remains relatively unexplored considering the great potential these polymers would represent for applications. In this paper, thiol-functional oligophosphonates were designed and coupled a thiol-ene reaction to styrene-butadiene rubber (SBR). We adopted RAFT methodology with dimethyl vinylphosphonate (DMVP) high-temperature thermolysable...

The production, optimisation and partial characterisation of xylanases from newly isolated wild strains of Coprinellus disseminatus was performed in solid-state fermentation. Strains SH-1 and SH-2 showed high xylanase (727.78 and 227.99 IU/mL) with very low CMCase (0.925 and 0.660 IU/mL) and laccase (0.640 and 0.742 U/mL) activities at incubation time seven days, 37 degrees C and initial pH 6.4...

The second harmonic (SH) generation from the highly epitaxial Al-doped ZnO film on sapphire was measured, using the femtosecond Ti:Sapphire laser at the near-resonant SH wavelength, in reflection geometry to avoid the sapphire's contribution in the conventional Maker fringes technique. By investigating SH intensities as a function of the azimuthal angle along the film's normal, we found that th...