Ocean University of China

About: Ocean University of China is a education organization based out in Qingdao, China. It is known for research contribution in the topics: Population & Sea surface temperature. The organization has 27604 authors who have published 27886 publications receiving 440181 citations. The organization is also known as: Zhōngguó Hǎiyáng Dàxué & OUC.

Enantioselective Rh-Catalyzed Carboacylation of C═N Bonds via C–C Activation of Benzocyclobutenones

Abstract: Herein we describe the first enantioselective Rh-catalyzed carboacylation of oximes (imines) via C–C activation. In this transformation, the benzocyclobutenone C1–C2 bond is selectively activated by a low valent rhodium catalyst and subsequently the resulting two Rh–C bonds add across a C═N bond, which provides a unique approach to access chiral lactams. A range of polycyclic nitrogen-containing scaffolds were obtained in good yields with excellent enantioselectivity. Further derivatization of the lactam products led to a rapid entry to various novel fused heterocycles.

Effect of dietary carbohydrate level on growth performance, body composition, apparent digestibility coefficient and digestive enzyme activities of juvenile cobia, Rachycentron canadum L

Abstract: A 9-week feeding trial was conducted to investigate the effect of dietary carbohydrate level on the growth performance, body composition and apparent digestibility coefficient and digestive enzyme activities of juvenile cobia. Six isonitrogenous and isolipidic diets containing graded levels of starch (1.3%, 6.5%, 12.5%, 18.4%, 24.2% and 30.4%) were fed to juvenile cobia. Specific growth rate (SGR), feed efficiency ratio (FER) and protein efficiency ratio (PER) increased with increasing dietary starch up to 18.4% (P<0.05), and thereafter SGR declined but FER and PER remained nearly the same. Apparent digestibility coefficient of starch reduced significantly when dietary starch up to 30.4%. Fish fed the diets with starch from 18.4% to 30.4% showed higher amylase activities in intestinal tract than those fed diets containing starch 1.3% and 6.5% (P<0.05). Significantly higher whole-body lipid contents were observed in fish fed the diets containing higher starch. Whole-body moisture content was inversely correlated with whole-body lipid content, while protein and ash showed no significant differences. Plasma glucose, hepatosomatic index, liver glycogen and liver lipid increased with an increasing dietary starch. Based on SGR and FER, the appropriate dietary starch supplementations of juvenile cobia were estimated to be 21.1% and 18.0 % of diet respectively.

Robust electrocatalysts from an alloyed Pt–Ru–M (M = Cr, Fe, Co, Ni, Mo)-decorated Ti mesh for hydrogen evolution by seawater splitting

Abstract: A prerequisite for creating green hydrogen energy is to develop cost-effective electrocatalysts with reduced overpotentials, increased current density, and therefore enhanced catalytic activity toward water splitting. We present here the fabrication of an alloyed Pt–Ru–M (M = Cr, Fe, Co, Ni, Mo)-decorated titanium mesh by a simple electrodeposition technique. The resultant electrocatalysts were thoroughly characterized and evaluated by catalyzing seawater splitting. The preliminary results demonstrate that the titanium-mesh-supported Pt–Ru–M electrodes have markedly enhanced catalytic activity for the hydrogen evolution reaction in comparison to the corresponding Pt or Pt–Ru electrode, arising from the alloying effects between the transition metals and Pt species. Moreover, the resultant Pt–Ru–Mo alloy electrodes show remarkable stability over 172 h of operation, suggesting their promise for use in practical applications.