Time filter

Source Type

Zaozhuang, China

Zhang H.B.,Sichuan Agricultural University | Wang M.S.,Sichuan Agricultural University | Wang M.S.,Zao Zhuang University | Wang Z.S.,Sichuan Agricultural University | And 4 more authors.
Biological Trace Element Research

This study was conducted to estimate dietary zinc (Zn) levels on growth performance, carcass traits, and intramuscular fat (IMF) deposition in weaned piglets. Sixty piglets were randomly divided into five groups, as follows: control (basal diet), Zn250, Zn380, Zn570, and Zn760 with supplementation of 250, 380, 570, and 760 mg Zn/kg of the basal diet, respectively. The final weight, average daily gain (ADG), gain/feed (G/F), lean meat percentage, fat meat percentage, lean eye area, backfat thickness, and IMF content were dose-dependently increased in all groups of Zn treatment. The serum total triglycerides (TG) and free fatty acid (FFA) were significantly higher in all Zn treatments than in the control. The enzyme activities of lipoprotein lipase (LPL), fatty acid synthase (FAS), and acetyl-CoA carboxylase (ACC) were markedly higher, while enzyme activities of hormone-sensitive lipase (HSL) and carnitine palmitoyltransferase-1 (CPT-1) were significantly lower in all Zn treatments than in the control. The messenger RNA (mRNA) levels of sterol regulatory element-binding protein 1 (SREBP-1), stearoyl-CoA desaturase (SCD), FAS, ACC, peroxisome proliferator-activated receptor γ (PPARγ), LPL, and adipocyte fatty acid-binding protein (A-FABP) were significantly higher, while the mRNA levels of CPT-1 and HSL were significantly lower in all Zn treatments compared with the control. These results indicated that high levels of Zn increased IMF accumulation by up-regulating intramuscular lipogenic and fatty acid transport gene expression and enzyme activities while down-regulating lipolytic gene expression and enzyme activities. © 2014, Springer Science+Business Media New York. Source

Huang C.-F.,China Institute of Technology | Zeng D.-F.,Zao Zhuang University | Chu J.,China Institute of Technology
2010 International Conference on Intelligent Computation Technology and Automation, ICICTA 2010

Under the presupposition of competition level keeping unchangeable, we construct a random evolution model of Incomplete Competitive System to explore its structure, nature and evolution behavior based on the random choice mechanism to competitors by mathematical analysis and numerical simulation. In this model, the death probability of node keeps a logarithm correlation with its original competence. System size may present three kinds of states: monotonic increase, stable, monotonic decrease, and it depends on the quitting threshold of system node and system competitive coefficient. The competence of node will decrease with an exponential or power speed, and in a long time, the competence distribution appears stable which is overlapped by a power law with -1 and original competence distribution. There is a power law or logarithmic correlation between node's life and its original competence. The number of one node's competitor will be monotonic increasing logarithmically before its death, and will be proportional to the logarithm of its age. System's degree distribution obeys an exponential distribution approximately, and it doesn't depend on the original node competence distribution. © 2010 IEEE. Source

Liu C.,Zao Zhuang University | Zhou L.,Guang Xi University | Ma L.,Guang Xi University
Journal of Chemical and Engineering Data

Densities of glycine, l-alanine, and l-serine in aqueous solutions of N-methylformamide (NMF) were measured at 298.15 K. The standard partial molar volumes (Vφ°), standard partial molar volumes of transfer (ΔtrVφ°) and hydration numbers for the amino acids were also determined. It is shown that hydrophilic-hydrophilic interactions between charged groups of amino acids and the -CONH- group of NMF are predominant in the case of glycine and l-serine. For l-alanine, however, in NMF solutions with m < 1.5 mol·kg-1, the interaction between the alanine -CH3 group and NMF weakens the interaction between its charged group and the hydrophilic group of NMF, while for NMF solutions with m > 1.5 mol·kg-1, the hydrophilic- hydrophilic interactions increase with the increasing concentration of NMF. The results are interpreted in terms of a cosphere overlap model. © 2010 American Chemical Society. Source

Liu C.,Zao Zhuang University | Zhou L.,Zao Zhuang University | Lin R.,Zhejiang University
Journal of Solution Chemistry

The apparent molar volumes (V φ ) of glycine, L-alanine and L-serine in aqueous 0 to 4 mol·kg-1 N-methylacetamide (NMA) solutions have been obtained by density measurement at 298.15 K. The standard partial molar volumes (Vφ 0 and standard partial molar volumes of transfer (Δtr Vφ 0 have been determined for these amino acids. It has been show that hydrophilic-hydrophilic interactions between the charged groups of the amino acids and the -CONH- group of NMA predominate for glycine and L-serine, but for L-alanine the interactions between its side group (-CH3) and NMA predominate. The -CH3 group of L-alanine has much more influence on the value of Δtr Vφ 0 than that of the -OH group of L-serine. The results have been interpreted in terms of a co-sphere overlap model. © 2010 Springer Science+Business Media, LLC. Source

Liu C.,Zao Zhuang University | Zhou L.,Zao Zhuang University | Fan L.,Zao Zhuang University | Ren C.,Zao Zhuang University
Journal of Chemical and Engineering Data

Enthalpies of solution and densities of glycylglycine in aqueous solutions of NaNO3, NaClO4, and Na2SO4 were measured at 298.15 K. Standard transfer enthalpies (ΔtrH0), standard transfer partial molar volume (ΔtrVø0), and hydration numbers (Nh) have been determined for glycylglycine. All of the ΔtrH0 values are negative in the three salt solutions. The relative order of ΔtrH0 in the same concentration of 1-1 type salts is NaNO3 > NaClO4. The ΔtrH0 in low concentration of Na2SO4 solutions is between the corresponding values in NaNO3 and NaClO4 solutions. With increasing Na2SO4 concentration, the ΔtrH0 values exceed that in NaNO3 solutions. The ΔtrVø0 values are positive and vary in the sequence Na2SO4 > NaNO3 > NaClO4. The results were discussed in terms of various interactions. © 2015 American Chemical Society. Source

Discover hidden collaborations