The northern South China Sea,including the Zhujiangkou Basin and the Beibuwan Basin,developed high-quality lacustrine source rocks during the Eocene rifting period.These source rocks are vital for hydrocarbon generati...The northern South China Sea,including the Zhujiangkou Basin and the Beibuwan Basin,developed high-quality lacustrine source rocks during the Eocene rifting period.These source rocks are vital for hydrocarbon generation in the northern South China Sea.The ZhuⅠdepression in the Zhujiangkou Basin and the Beibuwan Basin typically exhibit high abundance of C_(30)4-methyl steranes.However,shales in the Eocene Wenchang Formation in the ZhuⅢdepression of the Zhujiangkou Basin contains lower quantities of high-quality lacustrine source rocks with 4-methyl steranes,which often co-elute with some pentacyclic triterpanes in gas chromatography-mass spectrometry(GC-MS).Therefore,the single 4-methylsterane parameter based on GC-MS cannot accurately distinguish organic source in the deep to semi-deep water lacustrine source rocks of the Wenchang Formation from other source rocks,thus impeding the recognition of their contributions to petroleum reservoirs.In this study,GC-MS of aliphatic hydrocarbons,palynofacies and algal identification,as well as stable carbon isotope data of organic matter were used to identify the algal species and construct the paleoclimate during deposition of the Wenchang Formation source rocks in the ZhuⅢdepression of the Zhujiangkou Basin.It is suggested that during the Wenchang Formation period,freshwater green algae prevailed in the lake,which is likely account for the relatively low content of 4-methyl steranes in the high-quality lacustrine source rocks.Controlled by the algal species,it is proposed that the content of C_(30)tetracyclic polyprenoids(TPP)can better indicate the quality of the Wenchang source rocks than C_(30)4-methyl steranes.Consequently,a relationship between the TPP index and the quality of the lacustrine source rocks in the Wenchang Formation of the ZhuⅢdepression was established.A higher TPP index indicates higher organic matter abundance and hydrogen index of the lacustrine source rocks.When applied to the origin analysis of oils in the ZhuⅢdepression,it is believed that the organic-rich deep lacustrine source rocks in the Wenchang Formation made great contribution to the transitional zone crude oils in the Wenchang A and Wenchang B depressions.展开更多
A molecular dynamics simulation study was performed to investigate the formation and evolution mechanisms of nano-clusters during the rapid solidification of liquid CaToMg30 alloy. The cluster-type index method （CTIM...A molecular dynamics simulation study was performed to investigate the formation and evolution mechanisms of nano-clusters during the rapid solidification of liquid CaToMg30 alloy. The cluster-type index method （CTIM） was adopted to describe microstructure evolutions of nano-clusters during solidification. Results indicate that amorphous structure is mainly formed with three bond-types of 1551, 1541 and 1431 at the cooling rate of 5~1011 K/S, and glass transition temperature Tg is about 530 K; the icosahedron cluster of （12 0 12 0） plays a key role in formation of amorphous structure, and smaller Mg atoms are much more probable to be central atoms of icosahedron clusters; and nano-clusters are mainly formed by combining medium-size clusters. Interestingly, it was also found that formation and evolution processes of the nano-cluster display a three-stage feature which is analogous to crystallization process of amorphous alloy.展开更多
目的:探讨银杏叶注射液对神经性耳聋患者血清一氧化氮(NO)、连接蛋白26(Connexin26)、连接蛋白30(Connexin30)及临床疗效。方法:选取我院耳鼻咽喉科收治的突发性感音神经性耳聋患者92例,采用随机数字表方法将所有患者平均分为两组,各组4...目的:探讨银杏叶注射液对神经性耳聋患者血清一氧化氮(NO)、连接蛋白26(Connexin26)、连接蛋白30(Connexin30)及临床疗效。方法:选取我院耳鼻咽喉科收治的突发性感音神经性耳聋患者92例,采用随机数字表方法将所有患者平均分为两组,各组46例,对照组予以营养神经、高压氧等常规治疗,治疗组在对照组常规治疗的基础上加用银杏叶注射液10 m L加入5%葡萄糖注射液500 m L中,日1次静滴。分别检测两组患者治疗前后血清中NO、Connexin26、Connexin30水平,采用纯音测听检测两组患者治疗前后听力功能情况。结果:1两组患者治疗后NO、Connexin26、Connexin30水平较治疗前明显升高,差异有统计学意义(P<0.05);2治疗后,治疗组NO、Connexin26、Connexin30较对照组明显升高,差异有统计学意义(P<0.05);3治疗组治疗后临床总有效率(91.30%)明显高于对照组临床总有效率(71.74%),差异有统计学意义(P<0.05)。结论:银杏叶注射液能够提高突发性感音神经耳聋患者血清中NO、Connexin26、Connexin30,恢复患者听力水平,提高临床治疗疗效,对临床具有重要的临床应用价值。展开更多
基金The Basic Prospective Research Project of China National Offshore Oil Corporation under contract No.KJQZ-2024-2003.
文摘The northern South China Sea,including the Zhujiangkou Basin and the Beibuwan Basin,developed high-quality lacustrine source rocks during the Eocene rifting period.These source rocks are vital for hydrocarbon generation in the northern South China Sea.The ZhuⅠdepression in the Zhujiangkou Basin and the Beibuwan Basin typically exhibit high abundance of C_(30)4-methyl steranes.However,shales in the Eocene Wenchang Formation in the ZhuⅢdepression of the Zhujiangkou Basin contains lower quantities of high-quality lacustrine source rocks with 4-methyl steranes,which often co-elute with some pentacyclic triterpanes in gas chromatography-mass spectrometry(GC-MS).Therefore,the single 4-methylsterane parameter based on GC-MS cannot accurately distinguish organic source in the deep to semi-deep water lacustrine source rocks of the Wenchang Formation from other source rocks,thus impeding the recognition of their contributions to petroleum reservoirs.In this study,GC-MS of aliphatic hydrocarbons,palynofacies and algal identification,as well as stable carbon isotope data of organic matter were used to identify the algal species and construct the paleoclimate during deposition of the Wenchang Formation source rocks in the ZhuⅢdepression of the Zhujiangkou Basin.It is suggested that during the Wenchang Formation period,freshwater green algae prevailed in the lake,which is likely account for the relatively low content of 4-methyl steranes in the high-quality lacustrine source rocks.Controlled by the algal species,it is proposed that the content of C_(30)tetracyclic polyprenoids(TPP)can better indicate the quality of the Wenchang source rocks than C_(30)4-methyl steranes.Consequently,a relationship between the TPP index and the quality of the lacustrine source rocks in the Wenchang Formation of the ZhuⅢdepression was established.A higher TPP index indicates higher organic matter abundance and hydrogen index of the lacustrine source rocks.When applied to the origin analysis of oils in the ZhuⅢdepression,it is believed that the organic-rich deep lacustrine source rocks in the Wenchang Formation made great contribution to the transitional zone crude oils in the Wenchang A and Wenchang B depressions.
基金Project(50831003) supported by the National Natural Science Foundation of ChinaProject(20114BAB215026) supported by Jiangxi Provincial Natural Science Foundation,ChinaProject(ZD201002) supported by Fund for Basic Scientific Research of Gannan Medical University,China
文摘A molecular dynamics simulation study was performed to investigate the formation and evolution mechanisms of nano-clusters during the rapid solidification of liquid CaToMg30 alloy. The cluster-type index method （CTIM） was adopted to describe microstructure evolutions of nano-clusters during solidification. Results indicate that amorphous structure is mainly formed with three bond-types of 1551, 1541 and 1431 at the cooling rate of 5~1011 K/S, and glass transition temperature Tg is about 530 K; the icosahedron cluster of （12 0 12 0） plays a key role in formation of amorphous structure, and smaller Mg atoms are much more probable to be central atoms of icosahedron clusters; and nano-clusters are mainly formed by combining medium-size clusters. Interestingly, it was also found that formation and evolution processes of the nano-cluster display a three-stage feature which is analogous to crystallization process of amorphous alloy.
文摘目的:探讨银杏叶注射液对神经性耳聋患者血清一氧化氮(NO)、连接蛋白26(Connexin26)、连接蛋白30(Connexin30)及临床疗效。方法:选取我院耳鼻咽喉科收治的突发性感音神经性耳聋患者92例,采用随机数字表方法将所有患者平均分为两组,各组46例,对照组予以营养神经、高压氧等常规治疗,治疗组在对照组常规治疗的基础上加用银杏叶注射液10 m L加入5%葡萄糖注射液500 m L中,日1次静滴。分别检测两组患者治疗前后血清中NO、Connexin26、Connexin30水平,采用纯音测听检测两组患者治疗前后听力功能情况。结果:1两组患者治疗后NO、Connexin26、Connexin30水平较治疗前明显升高,差异有统计学意义(P<0.05);2治疗后,治疗组NO、Connexin26、Connexin30较对照组明显升高,差异有统计学意义(P<0.05);3治疗组治疗后临床总有效率(91.30%)明显高于对照组临床总有效率(71.74%),差异有统计学意义(P<0.05)。结论:银杏叶注射液能够提高突发性感音神经耳聋患者血清中NO、Connexin26、Connexin30,恢复患者听力水平,提高临床治疗疗效,对临床具有重要的临床应用价值。
