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The determination of sedimentary environment and associated energy in deep-buried marine carbonates:insights from natural gamma ray spectrometry log

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Frontiers of Earth Science 2024年第1期18卷 204-218页

作者： Jingyan LIU Qian CHANG Junlong ZHANG Hui CHAI Feng HE Yizan yang Shiqiang XIA School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Exploration and Development Research Institute Daqing Oilfield CompanyPetroChinaDaqing 163712China China National Oil and Gas Exploration and Development Co. Ltd(CNODC)Beijing 100032China Beijing Research Institute of Uranium Geology Beijing 100029China College of Mining Engineering North China University of Science and TechnologyTangshan 063210China

It has always been challenging to determine the ancient sedimentary environment and associated energy in deep-buried marine *** energy represents the hydrodynamic conditions that existed when the carbonates were *** energy includes light and chemical energies in compounds and kinetic energy in currents and mass ***-buried marine carbonates deposited during the Ordovician depositional period in the eastern Tarim Basin result from a complex interplay of tectonics,sedimentation,and *** a result,determining the ancient sedimentary environment and associated energy is *** natural gamma-ray spectrometry(GRS)log(from 12 wells)is used in this paper to conduct studies on the sedimentary environment and associated energy in deep-buried marine *** findings show that the values of thorium(Th),uranium(U),potassium(K),and gamma-ray without uranium(KTh)in a natural GRS log can reveal lithological associations,mineral composition,diagenetic environment,stratigraphic water activity,and ancient climatic *** the Ordovician,quantitative analysis and determination of sedimentary environment energy are carried out using a comprehensive calculation of natural GRS log parameters in typical wells(penetrating through the Ordovician with cores and thin sections)of well GC4,well GC6,well GC7,and well *** results show that GRS log can determine different lithology associations in typical wells than a sieve residue ***,cores and thin sections can be used to validate the determination of lithology *** on the determination of lithology associations,the lithology associations that reflect the sedimentary environment and associated energy can be analyzed in a new ***,the sedimentary environment energy curve derived from a natural GRS log can reveal hydrodynamic fluctuations during depositional periods,which will aid in the discovery of carbonate reservoirs,establishing sequence stratigra

关键词： ancient sedimentary environment energy of sedimentary environment marine deep-buried carbonates natural GRS the Ordovician eastern Tarim Basin

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中国大规模盐穴储氢需求与挑战

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岩土力学 2024年第1期45卷 1-19页

作者：杨春和王贵宾施锡林朱施杰郑铸颜刘伟范金洋中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071 中国科学院大学北京100049 重庆大学煤矿灾害动力学与控制全国重点实验室重庆400044

氢能是来源广泛且低碳清洁的能源,大力发展氢能产业是实现双碳目标和应对全球能源转型的重要举措。在氢能“制备―储存―运输―应用”全产业链中,储氢难问题长期制约着氢能产业高质量发展。盐穴储氢具有成本低、规模大、安全性高和储氢... 详细信息

氢能是来源广泛且低碳清洁的能源,大力发展氢能产业是实现双碳目标和应对全球能源转型的重要举措。在氢能“制备―储存―运输―应用”全产业链中,储氢难问题长期制约着氢能产业高质量发展。盐穴储氢具有成本低、规模大、安全性高和储氢纯度高等突出优势,是未来氢能大规模储备的重要发展方向,也是我国能源低碳转型的重大战略需求。综合调研了我国制氢产业和氢能消费现状,分析了我国盐穴储氢的需求。调研了国外利用盐穴储存天然气和氢气的技术及工程现状,总结了我国盐穴储气库发展和建设历程。对比了利用盐穴储存天然气、氦气、压缩空气和氢气的异同点,提出我国盐穴储氢面临三大科技挑战:层状盐岩氢气渗透与生化反应、盐穴储氢库井筒完整性管控、储氢库群灾变孕育与防控。研究成果明确了我国氢气储备需求的快速增长趋势和大规模盐穴储氢的重点攻关方向。

关键词：盐穴储氢层状盐岩氢岩反应井筒完整性库群灾变

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Middle hepatic vein variation provides a safe path for anterior transection of hepatocellular carcinoma in caudate lobe

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Hepatobiliary & Pancreatic Diseases International 2024年第4期23卷 438-440页

作者： Bing-Yi Lin Qi-Jun Zhang Zhe yang Shu-Sen Zheng Department of Hepatobiliary and Pancreatic Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Department of Thyroid Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Division of Hepatobiliary Pancreatic Surgery Shulan(Hangzhou)HospitalZhejiang Shuren University School of MedicineHangzhou 310000China

To the Editor:Hepatocellular carcinoma(HCC)is one of the main causes of cancer related death worldwide,and new cases are expected to continue to increase in future[1].Surgical resection is still the best way to remove the tumor and improve patient’s ***,resection of caudate lobe often presents a technical challenge,even to accomplished hepatic *** lobe is located anterior to the inferior vena cava(IVC)and posterior to the bifurcation of the portal vein(PV),generally consists of three regions:the paracaval portion,the left Spiegel lobe and the process portion[2].The anatomy of the paracaval portion includes the liver parenchyma ventral to the hepatic IVC and the area between the Spiegel lobe and the right lobe adjacent to the middle hepatic vein(MHV)ventrally,which was classified by Couinaud as segment IX[3].Here,we presented a case of HCC with successful downstaging therapy,as well as variation of MHV,which provides a safe path for anterior transection of segment IX.

关键词： hepatic anatomy Middle

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Metabolic and proteostatic differences in quiescent and active neural stem cells

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Neural Regeneration Research 2024年第1期19卷 43-48页

作者： Jiacheng Yu Gang Chen Hua Zhu Yi Zhong Zhenxing yang Zhihong Jian Xiaoxing Xiong Department of Neurosurgery Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

Adult neural stem cells are neurogenesis progenitor cells that play an important role in ***,neural regeneration may be a promising target for treatment of many neurological *** regenerative capacity of adult neural stem cells can be chara cterized by two states:quiescent and *** adult neural stem cells are more stable and guarantee the quantity and quality of the adult neural stem cell *** adult neural stem cells are chara cterized by rapid proliferation and differentiation into neurons which allow for integration into neural *** review focuses on diffe rences between quiescent and active adult neural stem cells in nutrition metabolism and protein ***,we discuss the physiological significance and underlying advantages of these diffe *** to the limited number of adult neural stem cells studies,we refe rred to studies of embryonic adult neural stem cells or non-mammalian adult neural stem cells to evaluate specific mechanisms.

关键词： adult neurogenesis cell metabolic pathway cellular proliferation neural stem cell niches neural stem cells neuronal differentiation nutrient sensing pathway proteostasis

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Enhanced electrical properties and Vickers hardness of calcium bismuth niobate ceramics by W/Co substituted at B-site

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Journal of Advanced Dielectrics 2024年第4期14卷 92-103页

作者： Fei Wang Jia yang Qing yang Ning Chen xinji yang Mingyue Mo Jie xing Zhi Tan Zhongqing Tian Fancheng Meng Yuheng Guo Huixing Lin Jianguo Zhu College of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054P.R.China College of Materials Science and Engineering Sichuan UniversityChengdu 610064P.R.China School of Electronic Engineering Chengdu Technological UniversityChengdu 611730P.R.China Key Laboratory of Inorganic Functional Material and Device Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899P.R.China

Calcium bismuth niobate(CBN)ceramic,as a core element of high-temperature piezoelectric sensors,has attracted widespread attention due to its high Curie temperature within the class of Aurivillius ***,CBN usually faces two *** piezoelectric constant and low *** this work,CBN-based ceramics with donor–acceptor ions(W/Co)co-substituted at B-site were prepared by solid-state reaction method,and structure–property relationship of ceramics was studied in ***-substitution of W/Co ions effectively improved the electrical property and hardness of CBN ***_(2)Nb_(1.91)(W_(2/3)Co_(1/3)T_(0.09)O_(9))exhibits enhanced electrical and mechanical properties including high resistivity of-10^(7)Ω·cm at 500℃,piezoelectric constant of-15.3 pC/N and hardness value of-3.57 *** values are two orders of magnitude,over two times,and 1.36 times higher than those of pure CBN ceramic,*** work provides a reference for exploring other bismuth-layered structural ceramics.

关键词： Calcium bismuth niobate ceramics donor and acceptor ions B-site electrical properties Vickers hardness

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Responses of nitrogen cycling and related microorganisms to brackish wetlands formed by evapotranspiration

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Pedosphere 2024年第1期34卷 252-266页

作者： Jiaohui FANG Tianshu LU Jian LIU Shangbin HE Xiufeng yang Huashan DOU Honghai ZHANG School of Life Sciences Qufu Normal UniversityQufu 273100China Environment Research Institute Shandong UniversityQingdao 266237China Hulunbuir Academy of Inland Lakes in Northern Cold&Arid Areas Hulunbuir 021000China

Elevated evapotranspiration due to warmer air temperature could raise salinity and nutrient levels of some inland wetlands, potentially impacting nitrogen cycling. To characterize the impact of high evapotranspiration on soil microbial nitrogen cycling in inland wetlands, we compared freshwater and brackish marsh(or non-marsh) wetlands in terms of sediment ammonia-oxidizing rate(AOR), denitrifying rate(DR), and related microbial communities in a typical inland basin, the Hulun Lake basin, in China. Results showed that marsh ecosystems(ME) exhibited 31% higher AOR and 65% higher DR than non-marsh ecosystems(NE). For NE, freshwater non-marsh wetland exhibited 12% higher AOR than brackish non-marsh wetland. This was probably due to the inhibitory effects of high NH_4~+ and salinity levels on ammonia-oxidizing archaea in brackish non-marsh wetland. Conversely, DR in brackish non-marsh wetland was 23% higher than that in freshwater non-marsh wetland, with total organic carbon(TOC) significantly influencing this difference,suggesting that the higher DR in brackish non-marsh wetland was mainly due to its higher TOC level. For ME, due to the direct and indirect interference of salinity, brackish marsh wetland displayed 26% lower AOR and 19% lower DR than freshwater marsh wetland. Besides, brackish wetlands harbored distinct ammonia-oxidizing and denitrifying microbial communities compared to freshwater wetlands. The assembly of these communities was dominated by stochastic processes, while brackish wetlands exhibited more prominent deterministic processes than freshwater wetlands. Overall, high evapotranspiration altered activities and community characteristics of ammonia oxidizers and denitrifiers in inland brackish wetlands by enhancing salinity and nutrient levels,while emergent plants occurring in ME could mitigate the adverse effects of salt stress of inland brackish wetlands on nitrogen cycling.

关键词： ammonia-oxidizing archaea ammonia-oxidizing bacteria aquatic plants denitrifying bacteria nitrogen transformation inland wetlands

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Mechanical properties and energy evolution of Beishan shallow-layer granite under different unloading paths

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Journal of Mountain Science 2024年第5期21卷 1728-1744页

作者： WANG Chuanle LI Erbing ZHANG Dengke HAN yang LU Hui HE Kang DU Guangyin School of Transportation Southeast UniversityNanjing 211189China College of Defense Engineering Army Engineering University of PLANanjing 210007China Nanjing Urban Construction Management Group Co. Ltd.Nanjing 210006China College of Field Engineering Army Engineering University of PLANanjing 210007China

Rock has mechanical characteristics and a fracture damage mechanism that are closely related to its loading history and loading path. The mechanical properties, fracture damage features, acoustic emission(AE) characteristics, and strain energy evolution of the Beishan shallow-layer granite used in triaxial unloading tests were investigated in this study. Three groups of triaxial tests, namely, conventional triaxial compression test(Group Ⅰ), maintaining deviatoric stress synchronously unloading confining pressure test(Group Ⅱ), and loading axial pressure synchronously unloading confining pressure test(Group Ⅲ), were carried out for the cylindrical granite specimens. AE monitoring device was utilized in these tests to determine the degree to which the AE waves and AE events reflected the degree of rock damage. In addition, the crack stress thresholds of the specimens were determined by volumetric strain method and AE parameter method, and strain energy evolution of the rock was explored in different damage stages. The results show that the shallow-layer granite experiences brittle failure during the triaxial loading test and unloading test, and the rock has a greater damage degree during the unloading test. The crack stress thresholds of these samples vary greatly between tests, but the threshold ratios of all samples are similar in the same crack damage stage. The Mogi-Coulomb strength criterion can better describe the unloading failure strength of the rock. The evolution of the AE parameter characteristics and strain energy differs between the specimens used in different stress path tests. The dissipative strain energy is the largest in Group Ⅱ and the smallest in Group Ⅰ.

关键词： Beishan granite Unloading test Mechanical properties Damage mechanism Acoustic emission Strain energy

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红黏土裂隙湿化自愈行为及强度影响机制

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中国公路学报 2024年第6期37卷 157-168页

作者：高乾丰吴昕阳曾铃余慧聪余涵长沙理工大学特殊环境道路工程湖南省重点实验室湖南长沙410114 长沙理工大学交通运输工程学院湖南长沙410114 长沙理工大学土木工程学院湖南长沙410114

许多黏性土在干缩开裂后受湿化作用会呈现裂隙自愈现象。为探究红黏土裂隙自愈行为及其对土体强度特性的影响机制,基于摄影识别与数字图像相关技术,分析湿化过程中红黏土试样顶面裂隙自愈与应变演化规律;并开展单轴拉伸试验与直剪试验,... 详细信息

许多黏性土在干缩开裂后受湿化作用会呈现裂隙自愈现象。为探究红黏土裂隙自愈行为及其对土体强度特性的影响机制,基于摄影识别与数字图像相关技术,分析湿化过程中红黏土试样顶面裂隙自愈与应变演化规律;并开展单轴拉伸试验与直剪试验,获取不同条件下红黏土的抗拉强度、抗剪强度及指标恢复率。最后采用扫描电镜观察裂隙自愈前后试样的微观形貌,阐明红黏土裂隙自愈及强度影响机制。结果表明:红黏土在湿化条件下表现出裂隙自愈行为,自愈过程中压应变区域不断向裂隙靠近,裂隙率快速减小并趋于稳定,裂隙自愈率可达90%以上;随饱水湿化时间增加,含裂隙红黏土的抗拉强度小幅提升,此时土表裂隙痕迹几乎消失;湿化条件下土颗粒膨胀程度有限,裂隙宽度越大其愈合难度越高,抗拉强度恢复程度也越低;裂隙深度增加后裂隙自愈率小幅提升,抗拉强度与黏聚力的恢复率增加,内摩擦角恢复率先减小后稳定;裂隙自愈主要源于土颗粒膨胀变形后引起裂隙两侧壁相互黏结,以及土颗粒崩解剥落后对裂隙的填充效应;由于细小颗粒与水混合后可能吸附在裂隙内形成假愈合现象,且土颗粒膨胀崩解将影响土体强度,故尽管表观上裂隙愈合程度良好,但抗拉强度与抗剪强度指标仅小幅恢复。

关键词：路基工程红黏土微观机制裂隙自愈强度特性

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Investigation of Quantum Dot Color Filter Micro-LED Display

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Photonic Sensors 2024年第1期14卷 40-47页

作者： Xuhui PENG yang ZENG Sitao HUO Zhenyuan yang Xiaoping HUANG Qing ZHAO School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu 611731China yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313001China Shanghai Tianma Microelectronics Shanghai 201201China

In this work,we present the investigation of the quantum dot color filter(QDCF)micro-light emitting diode(micro-LED)*** and red quantum dot photoresist(QDPR)materials are patterned into a pixelated array and precisely bonded with an all-blue micro-light emitting diode(micro-LED)substrate,forming a red,green,and blue(RGB)full color display through color conversion.A few factors that influence the achievable color gamut are further *** resulting 1.1-inch 228-pixels per inch(ppi)display demo shows the good *** findings in this paper pave a way to the future industrialization of the micro-LED display.

关键词： Quantum dot color filter(QDCF) color conversion micro-light emitting diode(micro-LED) color gamut

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Clinical and molecular characterization of 10 Chinese children with congenital adrenal hyperplasia due to 11beta‑hydroxylase deficiency

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World Journal of Pediatrics 2024年第4期20卷 422-433页

作者： Wen‑Li Lu Xiao‑Yu Ma Jiao Zhang Jun‑Qi Wang Ting‑Ting Zhang Lei Ye Yuan Xiao Zhi‑Ya Dong Wei Wang Shou‑Yue Sun Chuan‑Yin Li Rong‑gui Hu Guang Ning Li‑Dan Zhang Department of Pediatrics Ruijin HospitalShanghai Jiao Tong University School of MedicineNo.197Ruijin 2nd RdHuangpu DistrictShanghai 200025China Department of Pediatric Genetic and Metabolic Endocrinology West China Second University HospitalSichuan UniversityNo.20Section 3Renmin South RoadSichuan 610041China Department of Endocrine and Metabolic Diseases Shanghai Clinical Center for Endocrine and Metabolic DiseasesRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Cancer Center School of MedicineShanghai Tenth People’s HospitalTongji UniversityYanchang Zhong Lu 301St RdJing’an DistrictShanghai 200031China

Background The clinical manifestations of nonclassical 11beta-hydroxylase deficiency are very similar to those of nonclassical 21-hydroxylase *** this study,we investigated the relationship between the clinical and molecular features of congenital adrenal hyperplasia caused by 11beta-hydroxylase deficiency and reviewed the related literature,which are expected to provide assistance for the clinical diagnosis and analysis of congenital adrenal *** Clinical data for 10 Chinese patients diagnosed with congenital adrenal hyperplasia in our hospital from 2018 to 2022 were retrospectively *** examined the effects of gene mutations on protease activity and constructed threedimensional structure prediction models of *** We describe 10 patients with 11beta-hydroxylase gene mutations(n=5,46,XY;n=5,46,XX),with 10 novel mutations were *** patients received treatment at an early stage,with an average age of 2.08±1.66 years,whereas male patients received treatment significantly later,at an average age of 9.77±3.62 *** most common CYP11B1 pathogenic variant in the Chinese population was found to be c.1360C>*** mutations lead to spatial conformational changes that affect protein *** Our study found that there was no significant correlation between each specific mutation and the severity of clinical *** patients with the same gene pathogenic variant may have mild or severe clinical *** correlation between genotype and phenotype needs further ***-dimensional protein simulations may provide additional support for the physiopathological mechanism of genetic mutations.

关键词： 11β-hydroxylase deficiency CYP11B1 Enzymatic activity Phenotype-genotype correlation Threedimensional protein simulations

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