Xuefu Zhuyu decoction, a classic prescription in traditional Chinese medicine, has been widely used in the clinical treatment of cardiovascular and cerebrovascular diseases. In order to profile the chemical material basis of this formula, an ultra-performance liquid chromatography (UPLC) coupled with quadrupole time-of-flight mass spectrometry (Q/TOF MS) method has been established for rapid se…
Abstract Let albX : X → Alb(X) be the Albanese map of a smooth projective variety and f : X → Y the fibration arising from the Stein factorization of albX. For a positive integer m, if f and m satisfy two certain assumptions AS(1, 2), then the translates through the origin of all components of cohomological locus V 0(ωm/X, albX) ⊂ Pic0(X) generate I∗Pic0(S), where I : X → S denot…
Abstract In this paper, more than 100 articles related to anode catalysts for the direct methanol fuel cell (DMFC) are reviewed, mainly focusing on the three most active areas: (1) progress in preparation methods of Pt–Ru catalysts with respect to activity improvement and utilization optimization; (2) preparation of novel carbon materials as catalyst supports to create a highly dispersed and…
Abstract. Mesoporous silica-supported chiral Mn(salen) catalysts were prepared and evaluated in the heterogeneous asymmetric epoxidation of β-methylstyrene with NaClO as an oxidant. Homogeneous and immobilized Mn(salen) catalysts exhibit similar cis/trans ratios and ee values when trans-substrate is used but different cis/trans ratios and ee values when cis-substrate is used. The productio…
Abstract. Phosphate sorption capacities of 15 Chinese fly ashes were determined and related to their composition. The data of P sorption were best fitted to Langmuir equation, and the calculated sorption maxima of phosphate (Qm) ranged from 5.51 to 42.55 mg/g. The Qm value showed a significantly positive correlation with total Ca content (r = 0.9836**) and total Fe content (r = 0.8049**), but …
Abstract. Single-phase perovskite-like oxides NdSrCu1-xCoxO4-d and Sm 1.8Ce0.2Cu1-xCoxO4+d (x = 0, 0.2, and 0.4) were prepared using the citric acid complexing method coupled with ultrasonic treatment. We characterized the materials by a number of analytical techniques. It was found that the NdSrCu1-xCoxO4-d and Sm 1.8Ce0.2Cu1-xCoxO4+d catalysts possess T and T0 crystal structures, re…
Abstract Binary Cr–Mo oxide catalysts (denoted as Cr(x)Mo(y), x/y = nominal Cr/Mo molar ratio) supported on MgO-coated polyhedral three-dimensional (3D) mesoporous SBA-16 (MS) were fabricated for the oxidative dehydrogenation of iso-butane. The materials were characterized by a number of techniques for the establishment of the relationships between physicochemical properties and catalytic…
Plastid-encoded RNA polymerase (PEP) is closely associated with numerous factors to form PEP complex for plastid gene expression and chloroplast development. However, it is not clear how PEP complex are regulated in chloroplast.Here, one thioredoxin-like fold protein, Arabidopsis early chloroplast biogenesis 1 (AtECB1), an allele of MRL7, was identified to regulate PEP function and chloroplast …