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Articles by Y. Lin
Total Records ( 3 ) for Y. Lin
  H. Jiang , J. Wang , L. Che , Y. Lin , Z. Fang and De Wu
  The objective of this study was to investigate the effects of different calcium sources and levels on performance and bioavailability of calcium and phosphorus in weaning piglets. A total of 90 LY (LandracexYorkshire) weaning piglets were randomly assigned to 2x8 factorial completely randomized arrangement. The two calcium sources were calcium carbonate or calcium citrate; Eight dietary calcium levels were 0.37, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00 and 1.10%. Each treatment consisted of 3 replicate pens of 2 piglets. Digestibility trial was conducted from 29 to 32 day of experiment using the total collection method. No significant difference was observed on average daily gain, average daily feed intake and feed conversion rate in piglets (p>0.05) from calcium sources or interactions between calcium sources and calcium levels. There was a quadratic response of average daily gain to increasing calcium levels (p<0.05), with the optimum dietary calcium level of 0.6%. Piglets receiving dietary ranging from 0.37 to 0.80 had a higher calcium, phosphorus apparent digestibility than piglets receiving dietary ranging from 0.90 to 1.10%. Calcium citrate had significantly higher calcium apparent digestibility than calcium carbonate in piglets (p<0.05). It is concluded that calcium citrate is a good calcium source with comparable in bioavailability as calcium carbonate for weaning piglets. The piglets fed 0.6% calcium grew better, regardless of dietary calcium source.
  J.-S Wu , P.-K Jiang , S.X. Chang , Q.-F Xu and Y. Lin
  To better understand the impact of converting native forests to intensively managed plantations on soil carbon (C) and nitrogen (N) dynamics in subtropical China, we examined the seasonal patterns of water-soluble organic C (WSOC) and N (WSON) concentrations in soils in Chinese chestnut (Castanea mollissima Blume) (CF) and bamboo (Phyllostachys praecox C.D. Chu & C.S. Chou) plantation forests (BF) and adjacent native evergreen broadleaf forests (NF) in Ling-long Mountain, Zhejiang Province, China. The plantations were disturbed through surface soil removal and were fertilized and/or mulched, from which economic products (such as nuts and bamboo shoots) were annually harvested. We found that WSOC and WSON had large seasonal variations and were lower in the warmer than in the colder season. Average WSOC concentrations followed the order of BF (58.6) > NF (35.1) > CF (18.1 mg C kg-1), a pattern mainly caused by mulching in BF in winter and the removal of surface soil in CF. Soil total C and N followed the order of BF > NF > CF. The extensive inorganic and organic fertilizer application in BF caused WSON concentrations to be 21 and 14 times higher than those in NF and CF, respectively. Conversion of native forests to plantations lowered soil WSOC:WSON and soil C:N ratios. The seasonal dynamics of WSOC:SOC (soil organic C) and WSON/TN ratios followed the same patterns of WSOC and WSON, respectively. The impacts of forest types on WSOC/SOC ratio, which is a measure of the quality of organic matter, were dependent on seasonal changes of management practices and/or tree growth. Nevertheless mean annual WSON/TN ratios of BF and CF were 2 and 12 times that of NF, indicating that a greater proportion of the total soil N pool became solubilized in the intensively managed plantations. We conclude that land-use conversion and associated management practices had a profound impact on WSOC, WSON, and total C and N concentrations in the studied forest soils in subtropical China.
  Y. Lin , Y. Xu , G. Chen , B. Huang , J. Yao , Z. Chen , L. Yao , F. Lin , Y. Qiao , Z. Chen , S. Zhu , H. Huang and J. Wen
  Objective  It has been suggested that serum γ-glutamyltransferase is independently associated with cardiovascular mortality and atherosclerosis. The present study is to investigate the relationship between serum γ-glutamyltransferase and potential associated damage in an adult She Chinese population.

Method  A multistage, stratified, cluster, random sampling method was used to select an ethnically representative group of individuals aged 20-80 years in the general population. Brachial-ankle pulse-wave velocity was used to assess arterial stiffness in the general population and the Toronto Clinical Neuropathy Scoring System was used to detect diabetic peripheral polyneuropathy among populations with diabetes.

Results  A total of 5385 subjects were entered into the analysis. Serum γ-glutamyltransferase levels were classified into four groups using the 25th, 50th and 75th percentiles as cut points (males: < 20, 20-29, 29-52 and > 52 U/l; females: < 13, 13-18, 18-25 and > 25 U/l). As compared with the first quartile, the relative risks of arterial stiffness were 1.418, 1.667 and 2.394 in the other three categories, respectively (test for trend P < 0.05). After adjustment in five models, serum γ-glutamyltransferase was still a risk factor of arterial stiffness. We found inverted U-shape curves in both genders and the third quartile (male: 29 52 U/l; female: 18-25 U/l) had the highest odds ratios of 1.640 and 1.529, respectively.

Conclusions  We demonstrated that high serum γ-glutamyltransferase concentrations were directly associated with the increased risk of arterial stiffness, in general, and with peripheral polyneuropathy in subjects with diabetes in an ethnic She Chinese population. Alcohol use, gender, BMI and blood pressure were related to serum γ-glutamyltransferase and were involved in the relationship between serum γ-glutamyltransferase and brachial-ankle pulse-wave velocity.

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