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| 1 | Effects of the Ratio of n-6∶n-3 Polyunsaturated Fatty Acids in the Maternal Diet on Immunoglobulins,Fatty Acid Composition,and Performance of Lactating Sows and Suckling Piglets under Conditions of Low Maternal Energy Intake显示文摘This experiment was conducted to investigate the effects of different ratios of n-6 ∶ n-3 polyunsaturated fatty acids (PUFA) in sow diets on the performance of lactating sows and their piglets at low digestible energy intakes. Twenty-one pregnant Landrace sows were assigned to one of three diets from day 108 of gestation until weaning (26 to 29 d) ,containing n-6∶n-3 PUFA ratios of 3 ∶1,8 ∶1 and 11 ∶1. The effects on sow and litter production traits and on sow body condition were examined. There were no differences among treatments in daily feed intakes or in changes in sow weight and back-fat levels during lactation. Litter size,litter weight at birth and weaning and litter average daily weight gain were also unaffected by treatment. As expected, large differences were observed in n-6 and n-3 fatty acids in the colostrum and plasma of sows and piglets (P < 0. 01) . The ratio of n6 ∶ n-3 PUFA the diet was positively correlated with those in colostrum,sow plasma and piglet plasma (R 2= 0. 55,0. 80 and 0. 80,respectively) . Sow plasma insulin and IGF-I levels at weaning were unaffected by the treatments. Plasma leptin (P < 0. 05) concentrations were increased in sows fed the diet with a n-6∶n-3 ratio of 8 ∶ 1. Immunoglobulin concentrations in colostrum were not altered by dietary treatment. Plasma IgG concentrations at d 14 were highest in piglets from sows fed the 8 ∶ 1 ratio of n-6∶n-3. Furthermore,this group had the highest IgA concentrations at day 21 of lactation compared with the other two groups (P < 0. 05) . In summary,our study demonstrated that at low digestible energy levels,altering the ratio of n-6 ∶ n-3 PUFA in the diets for lactating sows affected immune components and the fatty acid composition of lactating sows and their piglets. Further studies are needed to examine whether higher levels of fat supplementation than those used in the present study (1. 5%) can successfully enhance performance. | Wei Yao Hongliang Zhao Jie Li Zhijun Wang Yuhuang Han Shuren Dong Yuejiang Wang Fenglai Wang | 2011 | Journal of Animal Science and Biotechnology2011，2，3： | 2 |
| 2 | Means to widen the temperature range of highdamping behavior by IPN formation 显示文摘 | YAO SHUREN | 1994 | Advances in Interpene-trating Polymer Networks1994，，2： | 1 |
| 3 | Synthesis and dynamic mechanical behavior of crosslinked copolymers and IPNs from vegetable oils显示文摘 | YIN Yeping YAO Shuren ZHOU Xueyong | 2003 | J Appl Polym Sci2003，88，7： | 1 |
| 4 | Monitor Forest Fires with FY Serial Satellites显示文摘Remote sensing as the measure to monitor disasters has the advantage of temporal resolution and large scale. Since '5.6 catastrophe' in 1987, China began to monitor forest fires broadly. In the summer of 2002, many forest/grass fires occurred in the Daxing'anling Mountains, and the damage was very heavy. In the forest fires fighting, the meteorological satellites play an important role in monitoring the fires. Especially the FY serial meteorological satellites have the advantage of large scale monitorin... | YAO Shuren WANG Mingyu SHU Lifu TIAN Xiaorui LI JieInstitute of Forest Protection. Chinese Academy of Forestryfire @forestry, ac. cn Forest fire manaeement office. State Forestry Administration | 2003 | Chinese Forestry Science and Technology2003，2，3： | 0 |
| 5 | CLASSIFICATION OF FIRE DANGER RATING AREA IN CHINA显示文摘INTRODUCTIONAfter the heavy fire happened inDaxinganling Mountains in1987,fire asone of the important part in forestry is paidmuch attention all over China in recentyears.Becauce of the lack of national fund,45 million Yuan can not meet the needs ofbasic construction and fire equipments re-newing,therefore,it is necessary to classifyfire danger rating area all over the countryto put this limited fund in key.Many coun-tries over the world paid much attention tothis classification of fire danger rating areaand provided many different researchmethods. | Zheng Huanneng Yao Shuren Northeast Forestry University | 1993 | Journal of Northeast Forestry University1993，4，1： | 0 |
| 6 | Study on the sound absorption mechanism in gradient water-soluble polymer solution显示文摘注意在溶解期间在 watersoluble 聚合物的健全吸收机制上对学习被给予。特殊设计的水溶性的聚合物涂层在我们的实验室被综合。健全变细性质在健全试管被测量。结果证明坡度聚合物答案的健全变细比制服的大。在分层的媒介取决于试验性的结果和声波繁殖的理论,坡度的机制水溶性的聚合物答案被开发。这机制能如下被描述:当它在水里被溶解时,水溶性的聚合物涂层形成了集中坡度层。这坡度层导致了声音的多重思考和吸收。最后,声能被变成热。 | WANG Yuansheng YANG Xue ZHU Jinhua YAO Shuren | 2006 | Chinese Journal of Acoustics2006，25，1： | 0 |
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