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Huan Yang,Ying Wang,Chi Ma,Chuan Sun,Yingchun Liu,Kaifeng Wu,Ming Li,Gerelt Borjigin,Feng Gao 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.2
Objective: An experiment was conducted to investigate the effects of feed intake restriction during late pregnancy on the function, anti-oxidation capability and acute phase protein synthesis of ovine liver. Methods: Eighteen time-mated ewes with singleton fetuses were allocated to three groups: restricted group 1 (RG1, 0.18 MJ ME/kg W0.75 d, n = 6), restricted group 2 (RG2, 0.33 MJ ME/kg W0.75 d), n = 6) and a control group (CG, ad libitum, 0.67 MJ ME/kg W0.75 d, n = 6). The feed restriction period was from 90 days to 140 days of pregnancy. Results: The ewe’s body weight, liver weights, water, and protein content of liver in the restricted groups were reduced compared with the CG group (p<0.05), but the liver fat contents in the RG1 group were higher than those of the CG group (p<0.05). The increased hepatic collagen fibers and reticular fibers were observed in the restricted groups with the reduction of energy intake. The concentrations of nonesterified free fatty acids in the RG1 and RG2 groups were higher than those of the CG group with the reduction of energy intake (p<0.05), but there were decreased concentrations of lipoprotein lipase and hepatic lipase in both restricted groups compared with the CG group (p<0.05). In addition, the increased concentrations of β-hydroxybutyric acid, triglycerides, malondialdehyde, total antioxidant capacity and activities of superoxide dismutase activity and catalase were found in the RG1 group, and the concentrations of cholinesterase in the RG1 group were reduced compared with the CG group (p<0.05). For the concentrations of acute phase proteins, the C-reactive protein (CRP) in the RG1 group were reduced compared with the CG group, but there were no differences in haptoglobin relative to the controls (p>0.05). Conclusion: The fat accumulation, increased hepatic fibrosis, antioxidant imbalance and modified synthesis of acute phase proteins were induced in ewe’s liver by maternal malnutrition during late pregnancy, which were detrimental for liver function to accommodate pregnancy.
Zhen-Xin Zhou,Huan Jiang,Chen Yang,Ming-Zhi Yang,Han-Bo Zhang 한국미생물학회 2010 The journal of microbiology Vol.48 No.2
Invasive plants have caused great economic losses and environmental problems worldwide. Eupatorium adenophorum is one of the most invasive weeds in China. To better understand its invasive mechanisms, in the present paper, the microbial communities of healthy and diseased leaves of E. adenophorum were obtained using both culture-independent and -dependent methods and their diversities were compared. The bacteria obtained from culture-independent method belong to Proteobacteria (95.8%), Actinobacteria (2.1%), and Firmicutes (2.1%) and fungi belong to Ascomycota (65.2%) and Basidiomycota (34.8%). Very few overlapped microbial species were found by culture-dependent and -independent methods. Healthy leaves display higher bacterial diversity than diseased leaves. Phylogenetic structures are very different between healthy and diseased phyllosphere microbial communities. Bacteria close to Acinetobacter and Pseudomonas were dominant on healthy leaves, whereas those close to Shigella were dominant on diseased leaves. 52.9% of fungal clones from healthy leaves were Ustilaginomycetes, close to Rhodotorula phylloplana and uncultured basidomycete; by contrast, 60% of clones from diseased leaves were Lecanoromycetes, close to Umbilicaria muehlenbergii. No bacteria but four fungal strains phylogenetically close to Myrothecium sp. and Alternaria alternate were pathogenic to seedlings and detached leaves of the invasive plant. Therefore, this plant may be resistant to pathogens from bacteria but not fungi in its introduced range.
Lin Xue-ling,Zhang He-xiang,Yang Wei-xia,Chen Huan-ming,Pan Feng-chun 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.79 No.6
Magnetic semiconductors with high Curie temper (TC) and inherent ferromagnetism, which not only provide a data-processing function via semiconductors’ properties, but also offer a data-storage function through intrinsic ferromagnetism, have become key materials in the field of spintronics. We studied the electronic structures and magnetic properties of Mn-doped cubic (3C) SiC using first-principles calculation. The calculated results revealed that MnSi and MnC substitutions can introduce 3 μB and 1 μB magnetic moments into SiC, respectively, which are both localized and extended. The extended tails of the moments indicate a significant spatial extension of the spin-polarized electron states. The interaction between the long tails, which can mediate long-range ferromagnetic (FM) coupling up to 8.55 Å, and is very different from common exchange, in which the ferromagnetism decreases sharply with increasing distance between the moments, and is hard to maintain to the next-neighbor order due to the limited spatial spin-electrons distribution. The distributions of magnetic moments become more and more localized or extended as compressive or tensile strains are increased, but FM interactions under compressive and tensile strains are weaker than those in undeformed structure. The FM coupling mechanism is explained and discussed in detail using p–d electron exchange. These results can provide a routine for engineering FM semiconductor of 3C-SiC.