Climate warming at high northern latitudes has caused substantial increases in plant productivity of tundra vegetation and an expansion of the range of deciduous shrub species. However significant the increase in carbon (C) contained within above-ground shrub biomass, it is modest in comparison with the amount of C stored in the soil in tundra ecosystems. Here, we use a 'space-for-time' approac...

The hydration in the minor groove of double stranded DNA fragments containing the sequences 5'-dTTAAT, 5'-dTTAAC, 5'-dTTAAA and 5'-dTTAAG was investigated by studying the decanucleotide duplex d(GCATTAATGC)2 and the singly cross-linked decameric duplexes 5'-d(GCATTAACGC)-3'-linker-5'-d(GCGTTAATGC)-3' and 5'-d(GCCTTAAAGC)-3'-linker-5'-d(GCTTTAAGGC)-3' by NMR spectroscopy. The linker employed con...

The distances derived from nuclear Overhauser effect (NOE) spectra are usually converted into three-dimensional structures by computer algorithms loosely termed distance geometry. To a varying degree, these methods require that the distance data is unambiguously assigned to pairs of atoms. Typically, however, there are many NOE crosspeaks that cannot be assigned without some knowledge of the st...

MELAS CHASMA BASIN. C. M. Weitz 1 , E. Noe Dobrea 1 , R. M. E. Williams 1 , J. Metz 2 , C. Quantin 3 , M. Parente 4 , and J. Grotzinger 2 . 1 Planetary Science Institute, 1700 E. Fort Lowell, Suite 106, Tucson, AZ 85719 ([email protected]); 2 California Institute of Technology, 1200 E. California Blvd, Pasadena, CA 91125; 3 Laboratoire des Sciences de la Terre, Universite Claude Bernard, Lyon, Fran...

Lithium-Sulfur Batteries In article number 2201585, Zhongchao Bai, Jian Yang, Nana Wang, and co-workers highlight the progress of lithium-sulfur batteries with high sulfur loading cathodes summarize diverse strategies that enhance areal capacity to develop practical Li-S batteries. This is mainly discussed from perspective cathode structure composition, including hosts, binders, separators, int...

one thousand children from 20 day care centers were studied for intestinal parasites in tehran. the stool samples collected from 0 - 6.6 years old children and examined by formalin ether concentration method for parasitic ova and cyst. cellophane tape technique (graham’s method) also applied for enterobius vermicularis diagnosis, of these 454 children were positive. e.vermicularis with the rate...

The introduction of non-indigenous marine species in new habitats is generally associated with ships arriving at ports, driven by transported ballast water and sediment biofouling communities on ship hulls, drifting object underwater surfaces dock areas. present paper reports the record specie Sternaspis aff. nana Atlantic Ocean, discussing its possible conservation status method arrival to Bra...

• Highly communal people experienced low communion work environments as aversive. • They were also unlikely to accept a high status promotion in such an environment. • In contrast, low communal people were unconstrained by work environment communion. • On average, women scored higher in communion than men. • This may contribute to the underrepresentation of women in high status positions. a b s...

Sialic acid (SA), an acetylated derivative of neuroaminic acid, is widely distributed in mammals’ tissue. N-acetyl neuroaminic acid (NANA) is the most common form of sialic acid. Since SA is usually bound to glycoproteins, glycolipids, oligosaccharides and polysaccharides, small amount of it is free in the body. Moreover, SA is an important structural component of biological membrane. It was al...