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Articles by Fan Wang
Total Records ( 3 ) for Fan Wang
  Jian-Bin Liu , Fa-Di Li , Fan Wang , Xia Lang , Jian Guo , Xiao-Ping Sun , Yao-Jing Yue , Rui-Lin Feng and Bo-Hui Yang
  This study was conducted to investigate the effects of concentrate-roughage ratio in diets on concentration of VFA in rumen liquid, pH and digestive enzyme activities in different sections of alimentary canal. The 48 weaned male lambs of Ganjia sheep weighing (23.18±2.16) kg at the age of 3-5 months were divided similarly into three groups which each group included 16 lambs. Lambs were fed diets with a concentrate-roughage ratio of 40:60 (A), 50:50 (B) and 60:40 (C). Digestible energy and crude protein levels were 0.8, 0.9 and 1.0 times the NRC-recommended levels during the 60 days experimental period. About 12 lambs from each group were slaughtered for sampling at the end of the regular feeding period. The results showed that concentration of Total VFA (TVFA) in rumen liquid of lambs from Group C was obviously higher than those from Group A and B (p<0.05); the pH of rumen liquid, homogenates of mucosa and contents in posterior segment-jejunum and of contents in ileum were affected significantly by the concentrate-roughage ratio of diets (p<0.05); there were non-uniform pattern ranked of activities of various digestive enzyme along small intestine with concentrate-roughage ratio of the diets; the highest activities of chymotrypsin in content and those of lipase in mucosa homogenate and content occurred in the middle piece-jejunum, activity of trypsinase in contents of posterior segment-jejunum was the highest and the highest activities of α-amylase were noted in content of duodenum and posterior segment-jejunum. It was concluded that still acetic acid pattern of rumen fermentation was kept in lambs fed total mixed diet with higher concentrate-roughage ratio; the pH of contents in rumen and abomasums of mucosa and contents in posterior segment section of small intestine were affected by the concentrate-roughage ratio of the diets; there was also higher activity of α-amylase in duodenum.
  Fan Wang , Chonglei Li , Wei Liu and Yihe Jin
  Volatile Organic Compounds (VOCs) are one of the main substances causing multiple chemical sensitivity reactions in human indoors. In order to investigate the effect of short-term of VOCs mixture on oxidative stress responses in mice, researchers exposed male Kunming mice to filtered air (0) and four kinds of VOCs mixture treated air. The concentrations of VOCs were following about: Form Aldehyde (FA), Benzene, Toluene and Xylene (BTX) 1.0 + 1.1 + 2.0 + 2.0, 3.0 + 3.3 + 6.0 + 6.0, 5.0 + 5.5 + 10.0 + 10.0 and 10.0 + 11.0 + 20.0 + 20.0 mg m-3, respectively which corresponded to 10, 30, 50 and 100 times of indoor air quality standard in China for 2 h day-1 for 5 days/week for 2 weeks in the whole body exposure chamber. One day following the last VOCs mixture exposure researchers collected liver, serum, lung and Bronchia Alveolus Lavage Fluid (BALF) from each mouse and examined LDH in BALF, ROS in lung, antioxidant enzyme activities, ROS, lipid and protein peroxidation and Reactive Nitrogen Species (RNS) in liver, DNA damage marker in serum. LDH release in BALF indicated cell impairment in the alveolar area. There was a positive correlation between LDH release in BALF and ROS production in lung (r = 0.636, p<0.001). The oxidative stress and injury in the liver occurred as VOCs mixture appeared to trigger a cascade of reactions such as lipid and protein peroxidation. Total antioxidation capacity and activities of antioxidative enzymes other than CAT were significantly decreased and nitric oxide was increased in liver in mice exposure to VOCs. The 8-OHdg in serum exposure to a high dose of VOCs was significantly higher than control. These results showed that inhalation of short-term VOCs mixture influence oxidative stress of the mice so as to induce a variety of oxidative products. ROS, GSH, GSH-Px, T-AOC, iNOS in liver could be used as sensitive biological makers of oxidative damage under short-term VOCs mixture condition. These findings also provide the occupational exposure limit concentrations for VOCs with valuable reference.
  Yang Wang , Fan Wang , Li-Juan Wang and Tian-Wei Zhang
  Function orientation plays a very important role in the design of a high-speed railway station. The functions include the passing function, transfer function and commercial function. The qualitative and quantitative analysis methods were used in analyzing the function. According to the high-speed train’s features of high density, less regulation capacity and high punctuality, the numbers of the time for waiting for train’s departure and for gathering passengers were calculated after some parameters were given, the two numbers are decreased, respectively, to 49.1 and 53.2% of the conventional railway passenger station, the passing function should be included in the design of the high-speed railway passenger station. Considering that it is unable to provide a door to door service, a high-speed railway station is often connected by two or more lines and a railway hub with several stations. Thus it is necessary for high-speed railway stations to have convenient and rapid transfer function with other traffic modes, as well as interior transfer in station and railway hubs. The business function improves the revenue and the service standard. Enough spaces for commercial development should be designed to make full use of the superiority of attracting people, commodities and information. Some practical problems should be solved to achieve the three functions.
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