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Middle Devonian ostracods from Jiwozhai patch reef(Dushan,Guizhou Province,South China):Biostratigraphic and palaeoecological implication

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Journal of Palaeogeography 2024年第3期13卷 581-593页

作者： Jun-Jun song Jia-Yuan Huang Wen Guo Kun Liang Yu-Cong Sun zhi-Hong Wang Wen-Kun Qie State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina Hubei Key Laboratory of Paleontology and Geological Environment Evolution Wuhan Center of China Geological SurveyWuhan 430205Hubei ProvinceChina University of Chinese Academy of Sciences NanjingNanjing 211135Jiangsu ProvinceChina

The Middle Devonian ostracods from the Jiwozhai patch reef in Dushan, Guizhou Province, South China were described for the first time in this study. Twenty-nine species belonging to 20 genera were identified and figured, including a new species named Wangshangkia jiwozhaiensis sp. nov. The ostracod fauna in the Jiwozhai patch reef represents a Givetian age. The ostracod assemblage belongs to the smooth-podocopid association, which is also ecologically equivalent to the Eifelian Mega-Assemblage Ⅲ. This association is indicative of shallow open-marine environments. The Jiwozhai patch reef fauna is primarily comprised of suspension feeders, including filter-feeding ostracods, corals, brachiopods and bryozoans. Ostracods from the Jiwozhai patch reef were compared to the ostracod faunas from Laurentia-Baltica at generic level, which reveals limited faunal exchanges between South China and Laurentia-Baltica during the Middle Devonian.

关键词： Ostracods Givetian Jiwozhai patch reef Dushan Palaeoecology

不同碳源对多孔球形LiFePO4/C复合材料的影响

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无机化学学报 2009年第1期25卷 42-46页

作者：于锋张敬杰杨岩峰宋广智中国科学院理化技术研究所北京100190 中国科学院研究生院北京100049

采用喷雾干燥-碳热还原法(SDCTM),分别研究了无机和有机碳源对锂离子正极材料LiFePO4/C形貌、结构及其充放电性能的影响。结果表明:以无机碳源炭黑制备的LiFePO4/C呈不规则球形,一次颗粒粒径在800nm左右,比表面积为2m2·g-1,0.1C放电比... 详细信息

采用喷雾干燥-碳热还原法(SDCTM),分别研究了无机和有机碳源对锂离子正极材料LiFePO4/C形貌、结构及其充放电性能的影响。结果表明:以无机碳源炭黑制备的LiFePO4/C呈不规则球形,一次颗粒粒径在800nm左右,比表面积为2m2·g-1,0.1C放电比容量为107.3mAh·g-1。而以有机碳源制备的LiFePO4/C,其形貌较为规则,呈多孔球形结构,具有较高的比表面积和放电比容量。其中,以柠檬酸为碳源制备的多孔球形LiFePO4/C复合材料,其孔径均在50nm左右,比表面积可达32m2·g-1;在室温下,0.1C和10C首次放电比容量分别为158.8和87.2mAh·g-1,具有优异的循环性能和高倍率充放电性能。

关键词： LiFePO4/C 正极材料多孔球形喷雾干燥-碳热还原法(SDCTM)

Radical involved reactive wetting and retarding mechanism of alumina refractory ceramic by molten slags under weak static magnetic field

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Journal of Iron and Steel Research International 2024年第6期31卷 1355-1366页

作者： Sheng-hao Li Ao Huang Fan-bo Zeng Hui Peng Hao-ran Wei Xue-chun Huang Sheng-qiang song Hua-zhi Gu The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina

High alumina slag will cause severe corrosion at the interface of alumina refractory,and the wetting behavior of slag is a key factor influencing the corrosion resistance of refractory *** static magnetic field is a promising solution for improvement in the slag resistance of *** wetting of alumina refractory ceramics with different basicities of high alumina slags under a weak static magnetic field was analyzed,given that a weak static magnetic field can affect the corrosion behavior of refractory *** slag S_(3) as an example,when there was an external static magnetic field of 1.0 mT at 1600 ℃,the thickness of calcium aluminate reaction layer at the interface decreased by 36.7%,the denting depth of interface decreased by 35.6%,and the apparent wetting angle increased by 20%.The living radicals and their formation path in oxide melts were verified by first-principles calculation combined with electron paramagnetic resonance spectroscopy *** influence of the flux density of a weak static magnetic field on the wetting behavior of slags was also *** contact angle of the slags increased owing to the inhibitory effect of magnetic field on the radicalinvolved reaction at the interface of the slag and the alumina refractory *** relationships between the magnetic flux density,diffusion coefficient,slag microstructure(hyperfine coupling constant),and contact angle were *** provides a theoretical basis for the field control of radical involved reactive wetting between inorganic oxide slags and solid oxide ceramics.

关键词： Alumina refractory ceramic Molten slag Weak magnetic field effect Reactive wetting Free radical

松辽盆地青山口组页岩孔隙结构及其对页岩油富集的影响

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地球化学 2019年第6期48卷 632-643页

作者：曾维主周国议宋之光中国科学院广州地球化学研究所有机地球化学国家重点实验室广东广州510640 中国科学院大学北京100049

页岩油主要富集于页岩的基质孔隙内,因而页岩孔隙结构是页岩油富集机理研究的重要内容。本文对松辽盆地青山口组页岩岩心样品进行了有机地球化学、低温N2等温吸附和高压压汞等分析,以期研究青山口组页岩的孔隙结构及其对页岩油富集的影... 详细信息

页岩油主要富集于页岩的基质孔隙内,因而页岩孔隙结构是页岩油富集机理研究的重要内容。本文对松辽盆地青山口组页岩岩心样品进行了有机地球化学、低温N2等温吸附和高压压汞等分析,以期研究青山口组页岩的孔隙结构及其对页岩油富集的影响。结果表明,页岩样品的汞孔隙度在3%~8%之间,平均孔喉直径在6.7~13.5 nm之间;N2吸附BJH(Barrett-Joyner-Halenda)孔体积在0.016~0.037 cm3/g之间,BET(Brunauer-Emmett-Teller)比表面积在2.7~14.4 m2/g之间。页岩石英含量与大孔孔体积之间有一定的正相关关系,这与石英颗粒有利于粒间孔隙的发育有关。N2吸附孔体积随着碳酸盐矿物含量的增加而明显降低,表明碳酸盐矿物以胶结物形态对孔隙起破坏作用。游离烃S1含量与比表面积之间存在明显的负相关关系,这与沥青充填微小孔隙有关。页岩含油饱和度(OSI)与汞孔隙度之间呈现较好的正相关关系,显示压汞所代表的孔隙度对页岩含油量有重要影响。页岩OSI随着大孔孔体积的增加而增加,表明页岩油主要储存在较大的孔隙内。综合分析发现,Yx58井样品由于具有较高的汞孔隙度和大孔孔体积,其含油量较高,表明该井所在地区青山口组底部地层具备一定的页岩油资源潜力。

关键词：孔隙结构 N2吸附高压压汞含油量青山口组页岩松辽盆地

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典型有机硫化合物热演化的加水热解实验研究

地球化学 2007年第3期36卷 247-252页

作者：宋之光王茂春刘祖发中国科学院广州地球化学研究所有机地球化学国家重点实验室广东广州510640 中山大学地理科学与规划学院广东广州510275

14种典型含硫化合物在200～330℃温度区间、在有低硫褐煤和硫抑制剂存在条件下的加水热模拟实验结果表明,大多数结构类型的含硫化合物是结构不稳定的化合物,它们的热稳定性差异很大,不同结构类型的含硫化合物所对应的热解温度不同,它们... 详细信息

14种典型含硫化合物在200～330℃温度区间、在有低硫褐煤和硫抑制剂存在条件下的加水热模拟实验结果表明,大多数结构类型的含硫化合物是结构不稳定的化合物,它们的热稳定性差异很大,不同结构类型的含硫化合物所对应的热解温度不同,它们在不同温度段产物的分布也不尽相同,这表明单个硫化合物的地球化学行为差异很大,而单个有机硫化合物在有机质热成熟过程中的转换特征基本上可以依据其生成硫化氢、二次含硫化合物以及大分子含硫化合物的量来描述。另一方面,硫化氢作为主要热解产物表明硫化合物分解生成硫化氢是有机硫化合物成熟转化的主要机理性过程。在所调查的化合物中,苯并噻吩、二苯并噻吩、二苯硫和噻蒽等在最高热解温度下也不发生任何化学反应,表明这些化合物代表了稳定型结构的硫化合物,这与这些化合物广泛存在于成熟原油和沉积有机质中的状况是一致的。上述结果还显示含硫化合物的种类和结构类型是受有机质的成熟度或演化阶段控制的。

关键词：有机硫化合物加水热模拟实验热解产物硫化氢

High-Performanceα-Diimine Nickel Complexes for Facile Access of PE Elastomers with Exceptional Material Properties

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Chinese Journal of Polymer Science 2024年第5期42卷 620-635,I0008页

作者： Li-Dong Qin Xin-Yu Wang Qaiser Mahmood zhi-Xin Yu Yi-Zhou Wang song Zou Tong-Ling Liang Wen-Hua Sun School of Pharmaceutical Sciences Changchun University of Chinese MedicineChangchun130117China Chemistry and Chemical Engineering guangdong Laboratory Shantou515031China Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing100190China

For practicable elastomeric polyethylene,achieving high catalyst thermal stability and activity,along with precise control of polymer properties such as branching density,molecular weights,and distribution,is crucial but *** this study,two sets of symmetricalα-diimine nickel complexes,each comprising four nickel bromide or chloride complexes,were synthesized and investigated their performance for ethylene polymerization under various reaction *** activation with either Et2AlCl or MMAO cocatalysts,these complexes displayed not only high activity but also generated high molecular weight polyethylenes with controlled polydispersity and a substantial number of *** catalyst with the least steric hindrance displayed the remarkable high activity(up to 1.2×10^(7) g·mol^(-1)·h^(-1)).Notably,nickel bromides demonstrated higher activity compared to their chloride *** investigation into the effect of reaction temperature on catalytic performance revealed that NiBrMe-MMAO system displayed high thermal stability(activity up to 2.51×10^(6) g·mol^(-1)·h^(-1) at 100℃)and consistently yielded high polymer molecular weights with narrow polydispersity over a broad temperature range of 30-100℃.Of significant note,mechanical analysis of the resulting polyethylene demonstrated excellent ultimate tensile strength and high strain at ***,the polyethylene sample prepared at 100℃exhibited ultimate tensile strength up to 10 MPa with 1863%maximum strain at break and a strain recovery of up to 54.9%after ten cycles at a fixed strain of 300%,indicating excellent material properties of prepared thermoplastic polyethylene elastomers(TPE).

关键词： Thermoplastic polyethylene elastomers α-Diimine nickel pre-catalysts Ethylene polymerization Mechanical properties Highly branched polyethylene

活血止痛汤对闭合性骨折肢体肿胀、疼痛的影响

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河南中医 2022年第10期42卷 1561-1564页

作者：宋志广柘城县人民医院河南柘城476200

目的:观察活血止痛汤对闭合性四肢骨折肢体肿胀、疼痛的影响。方法:选取2019年3月至2020年11月柘城县人民医院治疗的闭合性骨折肢体肿胀、疼痛患者100例,采用随机数字表法分为观察组和对照组,每组50例。对照组给予常规西医消肿止痛药物... 详细信息

目的:观察活血止痛汤对闭合性四肢骨折肢体肿胀、疼痛的影响。方法:选取2019年3月至2020年11月柘城县人民医院治疗的闭合性骨折肢体肿胀、疼痛患者100例,采用随机数字表法分为观察组和对照组,每组50例。对照组给予常规西医消肿止痛药物治疗,观察组在对照组治疗的基础上给予活血止痛汤治疗。观察两组患者临床疗效、临床指标及治疗前后疼痛肿胀程度、血清炎症因子表达水平等。结果:观察组有效率为98.0%,对照组有效率为84.0%,观察组有效率高于对照组,差异具有统计学意义(P<0.05);观察组疼痛缓解时间、肿胀缓解时间、骨痂生长时间、住院时间等临床指标均优于对照组,差异有统计学意义(P<0.05);两组患者治疗后疼痛、肿胀程度评分均低于治疗前,且观察组低于对照组,差异有统计学意义(P<0.05);对照组肿胀改善有效率为80.0%,张力性水泡发生率为20.0%,观察组肿胀改善有效率为96.0%,张力性水泡发生率为4.0%,且观察组肿胀改善有效率高于对照组,张力性水泡发生率低于对照组,差异具有统计学意义(P<0.05);两组治疗后血清白细胞介素-6、C反应蛋白、肿瘤坏死因子-α水平低于治疗前,且观察组低于对照组,差异具有统计学意义(P<0.05)。结论:活血止痛汤可明显减轻闭合性骨折患者患部肿胀、疼痛程度,其作用机制可能与对血清炎症因子表达水平的调整有关。

关键词：闭合性骨折活血止痛汤肿胀疼痛中西医结合疗法

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临近既有线铁路隧道悬臂式掘进机施工研究

建筑机械 2018年第5期 55-56+60页

作者：宋志广中铁十八局集团第四工程有限公司

结合云南安宁工业园区新亚美谷物流园铁路专用线白山隧道施工,介绍悬臂式掘进机开挖实际应用,为类似工程提供科学参考。

关键词：既有线机械开挖悬臂式掘进机

Unraveling colorectal cancer prevention:The vitamin D-gut flora-immune system nexus

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World Journal of Gastrointestinal Oncology 2024年第6期16卷 2394-2403页

作者： zhi-song Zhan Zu-Shun Zheng Jing Shi Juan Chen Si-Yi Wu Shi-Yan Zhang Department of Dentistry Fuding HospitalFujian University of Traditional Chinese MedicineFuding 355200Fujian ProvinceChina Department of Physical Examination Fuding HospitalFujian University of Traditional Chinese MedicineFuding 355200Fujian ProvinceChina Department of Anesthesiology Fuding HospitalFujian University of Traditional Chinese MedicineFuding 355200Fujian ProvinceChina Department of Clinical Laboratory Fuding HospitalFujian University of Traditional Chinese MedicineFuding 355200Fujian ProvinceChina Department of Surgery Fuding HospitalFujian University of Traditional Chinese MedicineFuding 355200Fujian ProvinceChina

Colorectal cancer(CRC)is one of the most common cancers diagnosed in the *** environmental and genetic factors play a major role in the pathogenesis of CRC,extensive research has suggested that vitamin D may play a pivotal role in the development of *** D,primarily obtained through sunlight exposure,dietary sources,and supplements,has long been recognized for its essential functions in maintaining health,including immune *** article delves into the intricate relationship between vitamin D,the immune system,gut flora,and the prevention of *** presents a synthesis of epidemiological data,experimental studies,and clinical trials,highlighting the mechanisms by which vitamin D influences immune cell function,cytokine production,and *** enhancing the immune system’s surveillance and antitumor activity,vitamin D may offer a promising avenue for CRC ***,this comprehensive review delves into the prospective clinical applications of vitamin D supplementation and delineates the forthcoming avenues of research in this dynamic ***,the paper tentatively outlines a spectrum of prophylactic impacts of vitamin D on CRC,emphasizing its significant potential in reducing CRC risk through shedding light on its mechanisms,encompassing antineoplastic mechanisms,influences on the immune system,and modulation of the gut microbiome.

关键词： Colorectal cancer Vitamin D Immune system Gut flora Immunomodulation Microbial dysbiosis Cancer prevention