Identification of Cold Tolerance Transcriptional Regulatory Genes in Seedlings of L. and L.

Alfalfa species L. (MS) and L. (MF), globally prominent perennial leguminous forages, hold substantial economic value.

A Low-Cost and Scalable Synthesis of a Cyclohexanone-Related Bifunctional Building Block.

A practical route to 2-(2-(2-methyl-1,3-dioxolan-2-yl)ethyl)cyclohexan-1-one was developed, featuring the use of inexpensive starting materials/reagents and readily attainable reaction conditions. The overall transformation was achieved in 53% yield with one chromatographic purification via NaOH-mediated aldol condensation, ethylene glycol protection of the ketone group in the presence of HC(OEt)/concd HCl, saturation of the C=C bond and the benzene ring with Al-Ni alloy in aqueous KOH, and oxidation of the intermediate cyclohexanol with aqueous NaClO/TEMPO/KBr.

Two novel semiconducting B CO monolayers with high carrier mobilities.

The design of new two-dimensional (2D) materials with moderate band gaps and high carrier mobility is an important aspiration for materials innovation. Recent studies have shown that boron and oxygen atoms can be integrated into the graphene lattice to form a stable B-C-O monolayer structure. To search for the most energetically stable configuration for 2D B-C-O, here, we theoretically propose two new 2D B-C-O crystal structures with a stoichiometric ratio of 2:1:1, namely monolayer (1 L) C - and C -B CO.

Comparison of soil microbial community between reseeding grassland and natural grassland in Songnen Meadow.

Microorganisms have important ecological functions in ecosystems. Reseeding is considered as one of the main strategies for preventing grassland degradation in China. However, the response of soil microbial community and diversity to reseeding grassland (RG) and natural grassland (NG) remains unclear, especially in the Songnen Meadow.

Regio- and Stereoselective Addition of HO/OOH to Allylic Alcohols.

A range of allylic alcohols are shown to readily react with ethereal HO in the presence of catalytic amounts of NaMoO-gly or MoO(acac), affording the C═C trans hydroxylation-hydroperoxylation products in good yields with high regio- and stereoselectivity. Use of enantiomers of cyclic substrates resulted in corresponding enantiopure diol--hydroperoxides. The possibility of further conversion of the diol--hydroperoxides into triols or linear building blocks with an isolated -peroxy group containing a quaternary center is also exemplified.

Facile perhydrolysis of oxetanes catalyzed by molybdenum species.

Perhydrolysis of a range of tertiary oxetanes was achieved in synthetically useful yields under mild conditions. Different functional/protecting groups were tolerated. Similar ring-opening of secondary oxetanes, which had been unfeasible to date, was also realized with ease.

A hydrogen peroxide based access to qinghaosu (artemisinin).

Attachment of H(2)O(2) onto the highly hindered quaternary C-12a in an advanced qinghaosu (artemisinin) precursor has been achieved through a facile perhydrolysis of a spiro epoxy ring with the aid of a previously unknown molybdenum species without involving any special equipment or complicated operations. The resultant β-hydroxyhydroperoxide can be further elaborated into qinghaosu, illustrating an entry fundamentally different from the existing ones to this outstanding natural product of great importance in malaria chemotherapy.

[Near-infrared reflectance spectroscopy analytic models established for the crude protein and crude fiber of alfalfa property].

Near-infrared reflectance spectroscopy (NIRS) calibrations of crude protein and crude fiber in 152 alfalfa samples were developed by means of partial least-squares (PLS) regression. Different interval wavelengths of 1, 2 and 5 nm and two kinds of samples (crude and fine) were set to collect spectral data and establish calibration respectively. The accuracy and repeatability of calibrations were verified so as to compare superiority and inferiority.