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Palynological assemblages and paleoenvironmental evolution in the Gyirong Basin since Middle Miocene

ACTA PETROLOGICA SINICA 2024年第5期40卷 1418-1428页

作者： Liu Jia Song Ai Zhang XinWen Gao Yi Chen LinLin Liu Binxu Su Tao Chengdu univ technol Inst Sedimentary Geol MNR Key Lab Deep Time Geog & Environm Reconstruct Chengdu 610059 Peoples R China Chinese Acad sci CAS Key Lab Trop Forest Ecol Xishuangbanna Trop Bot Garden Mengla 666303 Peoples R China Yunnan univ Sch Earth Sci Kunming 650500 Yunnan Peoples R China univ Bristol Sch Geog Sci Bristol BS8 1QU Avon England

The formation and evolution of the Himalaya orogeny, resulted from the collision between the Indian and Eurasian plates, has long captivated researchers in earth and life sciences. Late Cenozoic fluvio.lacustrine sedimentary basins, distributed along the Southern Tibet Detachment System on the northern slope of the Himalaya, have documented the evolution of the orogeny and paleoenvironmental changes. This study presents palynological analysis on the Danzengzhukang Formation, Woma Formation and Gongba Formation in the Gyirong Basin in the central Himalaya, to explore the sedimentary stratigraphy of the basin and the processes of Himalaya uplift and environmental effects. Based on palynological analysis, the deposition age of the Danzengzhukang Formation is revised to the Middle Miocene. Palynological assemblages reveal that since Middle Miocene, vegetation in the Gyirong Basin has transitioned from a mixed coniferous and broad.leaved forest to sparse woodlands and grasslands in Late Miocene. Subsequently, during the late Late Miocene and Pliocene, it evolved into alpine meadows, eventually forming the present.day alpine shrub and meadow vegetation since the Early Pleistocene. Paleoelevation analysis results indicate that the elevation of the Gyirong Basin has remained relatively similar to the present elevation since Middle Miocene, with no significant uplift during the deposition of the Danzengzhukang Formation and Woma Formation

关键词： ENVIRONMENTAL-CHANGES TIBETAN PLATEAU UPLIFT MONSOON ORIGIN AGE

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There discovery of alpine oak (Heterobalanus group, Quercus section Ilex, Fagaceae) fossils from Mount Shisha Pangma and its significance

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ACTA PETROLOGICA SINICA 2024年第5期40卷 1382-1393页

作者： Su, Tao Liu, jia Chen, Linlin Huang, Jian Zhang, Xinwen Wu, Feixiang Ni, Xijun Deng, Tao Zhou, Zhekun Chengdu univ technol Inst Sedimentary Geol MNR Key Lab Deeptime Geog & Environm Reconstruct Chengdu 610059 Peoples R China Chengdu univ technol State Key Lab Oil & Gas Reservoir Geol & Exploita Chengdu 610059 Peoples R China Chinese Acad sci Xishuangbanna Trop Botan Garden CAS Key lab Trop Forest Ecol Mengla 666303 Peoples R China univ Bristol Sch Geograph Sci Bristol BS8 1QU Avon England Chinese Acad sci Inst Vertebrate Paleontol & Paleoanthropol CAS Key Lab Veribrate Evol & Human Origins Beijing 100044 Peoples R China

We reported alpine oak fossil leaves ( the Heterobalanus group, Quercus section Ilex, Fagaceae) rediscovered on Mount Shisha Pangma. According to twice field investigations, the fossil site is located at the front of the No. 5 glacier tongue on the south side of the Dasuopu Glacier at an altitude of about 5800m on the north slope of Shisha Pangma Peak. These fossils are from the siltstone interlayer dominated by sandy conglomerate in the lower part of the Yebokangjiale Group. These newly discovered fossil leaves have typical characteristics of alpine oaks, including oval or oblong leaf, thick and short petiole, entire or toothed leaf margin, and 5 similar to 6 pairs of secondary veins, which is completely consistent with the leaf morphology of alpine oaks from Mount Shisha Pangma reported previously. Through morphological comparison with living and fossil species in this group, as well as quantitative analysis combined with geometric morphometry, these fossil leaves from Mount Shisha Pangma were assigned to Quercus preguajavifolia Tao. Alpine oaks may originate in southeastern margin of the Qinghai -Tibetan Plateau, then thrive locally and spread into regions nearby accompanying by the uplift of the plateau. The implication of alpine oak fossil leaves from Mount Shisha Pangma on paleoelevation needs to be further investigated due to the present wide range and the uncertainty of these fossils. The rediscovery of alpine oak fossils from Mount Shisha Pangma not only helps to clarify the specific layers bearing these fossils, but also further enriches the morphological characteristics of this fossil record and its systematic position. This discovery would provide important basis for better revealing the evolution of biodiversity and environmental changes in the middle part of the Himalaya during the Cenozoic.

关键词： Heterobalanus Leaf fossil Himalaya Mountain uplift Biodiversity Neogene LATE MIOCENE TIBETAN PLATEAU ELEVATION EXHUMATION EVOLUTION HIMALAYA OROGEN UPLIFT

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A nomogram model integrating LI-RADS features based on MRI for predicting microvascular invasion in hepatocellular carcinoma following Milan criteria

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 2-3页

作者：钟文新 Dept Radiol Huazhong Univ Sci&Technol Union Shenzhen HospShenzhen 518052

Objective To establish and verify a nomogram model based on MRI liver imaging reporting and data system (LI-RADS) features for predicting microvascular invasion (MVI) in hepatocellular carcinoma (HCC)following the Milan criteria.Methods A retrospective analysis was conducted on data from 118 HCC patients(121 lesions) confirmed by pathology from June 2016 to June 2022 at the Third Affiliated Hospital of Soochow university.

关键词： invasion hepatocellular microvascular

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Characteristics and impact factors of SARS-CoV-2 infection in adult patients with relapsed/refractory B-cell non-Hodgkin lymphoma receiving chimeric antigen receptor T-cell therapy

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 58-59页

作者：葛童 Dept Hematol Tongji HospTongji Med CollHuazhong Univ Sci&TechnolWuhan 430030

Objective To explore the clinical characteristics and treatment of COVID-19 infection in patients with relapsed/refractory B-cell non-Hodgkin lymphoma before and after receiving chimeric antigen receptor T-cell therap... 详细信息

关键词： patients infection lymphoma

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Long-term follow-up of humanized and murine CD19 CAR-T-cell therapy for B-cell acute lymphoblastic leukemia

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 59-60页

作者：都孟仪 Instit Hematol Union HospTongji Med CollHuazhong Univ Sci&TechnolWuhan 430022

Objective To explore the differences in safety and short-and long-term follow-up efficacy between humanized and murine CD19 CAR-T-cells for treating relapsed and refractory B-ALL.Methods Clinical data of 80 patients with R/R B-ALL treated with CD19-targeted CAR-Tcells at the Union Hospital of Tongji Medical College of Huazhong university of science and technology between May 2016 and March 2023 were analyzed.

关键词： CD19 CAR Clinical

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A multicenter cross-sectional study on the multidimensional clinical manifestations of irritable bowel syndrome

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 46-47页

作者：周丹 Dept Gastroenterol Union HospTongji Med CollHuazhong Univ&TechnolWuhan 430022

Objective To assess the differences in multidimensional clinical manifestations between patients with irritable bowel syndrome (IBS) matching the RomeⅢcriteria but not matching RomeⅣand IBS patients matching the RomeⅣcriteria,among patients diagnosed with IBS according to RomeⅢcriteria.Methods From November 2016 to October 2017.

关键词： clinical matching patients

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Efficacy of digital multi-dimensional parent-child training for children with attention deficit hyperactivity disorder:a controlled clinical study

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 63-64页

作者：郑荣君 Sch Mental Health&Psychol sci Anhui Med UnivHefei 230032

Objective To explore whether digital multidimensional parent-child training combined with medication is more effective than medication alone in treating symptoms and social function in children with attention deficit ... 详细信息

关键词： medication clinical alone

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Study on the effect of platycodin D on HG-induced podocyte injury in mice and cyclooxygenase-2/nuclear factor KB pathway

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 33-33页

作者：戚婷 Dept Nephrol Puren Hosp Affil to Wuhan Univ Sci&TechnolWuhan 430081

Objective To explore the effect of platycodin D(PD) on podocyte injury induced by high glucose and cyclooxygenase-2 (COX-2)/nuclear factor kappa B(NF-κB) pathway in mice.Methods MPC5 cells were divided into normal co... 详细信息

关键词： cyclooxygenase injury effect

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α-Lipoic acid improves spatial learning memory deficits induced by intracerebroventricular injection of streptozotocin via activation of JAK/STAT-GPX4 in rats

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China Medical Abstracts(Internal Medicine) 2024年第1期41卷 30-30页

作者：张瑶 Endocrinol Dept Liyuan HospTongji Med CollHuazhong Univ Sci&TechnolWuhan 430077

Objective To observe the effect of α-lipoic acid(ALA) on the intracerebroventricular injection (icv) of streptozotocin (STZ)-induced spatial learning memory impairments in rats and the underlying molecular mechanisms.Methods Forty-five male SD rats were assigned into 3 groups,control group,icv-STZ group and icv-STZ+ALA group,15 rats each.

关键词： JAK/STAT injection STZ

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Experimental and numerical simulation study on the erosion behavior of the elbow of gathering pipeline in shale gas field

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Petroleum science 2024年第2期21卷 1257-1274页

作者： En-Bin Liu Shen Huang Ding-Chao Tian Lai-Min Shi Shan-Bi Peng He Zheng Petroleum Engineering School Southwest Petroleum UniversityChengdu 610500SichuanChina Chongqing Natural Gas Sales Center Natural Gas BranchSinopecChongqing400023China Zhejiang Zheneng Natural Gas Operation Co. Ltd.Hangzhou 310000ZhejiangChina School of Civil Engineering and Architecture Southwest Petroleum UniversityChengdu 610500SichuanChina Louisiana Tech univ Trenchless Technol Ctr599 Dan Reneau DrRustonLA71270USA Southwest Oil and Gas Field Branch Natural Gas Research Institute Chengdu 610213SichuanChina

During the production period of shale gas, proppant particles and rock debris are produced together,which will seriously erode the elbows of gathering pipelines. In response to this problem, this paper takes the elbow of the gathering pipeline in the Changning Shale Gas Field as an example to test the erosion rate and material removal mechanism of the test piece at different angles of the elbow through experiments and compares the four erosion models with the experimental results. Through analysis, it is found that the best prediction model for quartz sand-carbon steel erosion is the Oka model. Based on the Oka model, FLUENT software was used to simulate and analyze the law of erosion of the elbow of the gas gathering pipeline under different gas flow velocities, gas gathering pressure, particle size, length of L1,and bending directions of the elbow. And a spiral pipeline structure is proposed to reduce the erosion rate of the elbow under the same working conditions. The results show that this structure can reduce erosion by 34%.

关键词： Shale gas Gas gathering pipeline Elbow Erosion CFD

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