| 1 | Discovery of Marine-terrestrial Transitional Facies Shale Gas in Taiyuan Formation of Zhenjia 1 Well,Northern Shaanxi,Ordos basin显示文摘Objective At present,there is controversy regarding the existence of marine-terrestrial transitional facies that can act as a source of shale gas.This detailed study of CarboniferousPermian age geological data from the northern Shaanxi area(China)provides new insight for this type of shale gas.In addition,a new deposition and accumulation pattern for this type of shale gas is established.Thus,the objectives of this study were to identify high quality gasbearing shale intervals in the lithological column of | ZHANG Yongsheng ZHENG Mianping XING Enyuan LI Yangchi GUI Baoling SHI Lizhi HE Yongtao WANG Linlin PENG Yuan ZHAO Haitong | 2017 | Acta Geologica Sinica(English Edition)2017，91，3： | 1 |
| 3 | Alteration of Intestinal Archaeal Community Composition in Broilers with Different Growth Rates显示文摘The gastrointestinal tract,as the major digestive and absorbing organ,plays an important role in chicken growth.Numerous studies have been undertaken to investigate the gut bacterial community in broilers,but little is known about the archaeal community composition.To improve our understanding of the composition of intestinal archaea and the relationship between archaea and chicken growth,a feeding trial was conducted with 10 000 Ross 308 chicks in a commercial production facility under standard management.At 38 d of age,15 birds with the highest body weight( H group),15 birds with average body weight( M group),and15 birds with the lowest body weight( L group) were selected among 600 healthy male individuals.Cecal archaeal community was detected based on 16 S rRNA gene sequencing.As a result,3 321 229 archaeal sequences were clustered into 1 281 operational taxonomic units( OTUs) and classified into three phyla( Crenarchaeota,Euryarchaeota and Thaumarchaeota) and six known genera: Natronomonas,Halolamina,Salinarchaeum,Cenarchaeum,Candidatus,Nitrosoarchaeum and Nitrososphaera.The alpha indices showed that,the richness of archaea in L group was the highest,and followed by that in M group and H group,while the archaea in H group were more diverse,followed by those in M group and L group.However,the archaeal composition in all chicken samples was similar,with the vast majority of the sequences belonging to Cenarchaeum,and only a few belonging to the other five genera. | Gui Guohong Xiao Yingping Dai Baoling Chen Xiaomin Yang Hua Xu E | 2017 | Animal Husbandry and Feed Science2017，9，6： | 0 |
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