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低场核磁共振测定鲜猪肉中水分分布的制样方法

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食品安全质量检测学报 2017年第6期8卷 2006-2011页

作者：黄子信吴美丹周光宏徐幸莲李春保南京农业大学食品科技学院教育部肉品加工与质量控制重点实验室农业部畜产品加工重点实验室南京210095

目的应用低场核磁共振技术(low field nuclear magnetic resonance,LF-NMR)测定不同鲜猪肉的制样方法(肉样大小、分切方向、是否包膜)的水分分布,以确定其较佳制样方法。方法以宰后24 h的猪背最长肌为对象,采用单因素实验,分别按不同大... 详细信息

目的应用低场核磁共振技术(low field nuclear magnetic resonance,LF-NMR)测定不同鲜猪肉的制样方法(肉样大小、分切方向、是否包膜)的水分分布,以确定其较佳制样方法。方法以宰后24 h的猪背最长肌为对象,采用单因素实验,分别按不同大小、不同分切方向和包膜与否进行3组实验,对LF-NMR的弛豫时间T_2相关指标进行方差分析和多重比较。结果随着肉样质量的增加,T_(2b)先减小后增大(P<0.05),A_(2b)、A21逐渐增加(P<0.05);肉样分切方向不影响样品水分含量分布测定结果;而包膜使样品的T_(2b)减小、A_(2b)和P-(2b)增加(P<0.05)。结论猪肉的制样样品大小为2.0 cm(长)×1.0 cm(宽)×1.0 cm(高),分切方向为沿肌肉方向,不包膜处理,这种制样方法对样品中水分分布情况的影响最小,能相对准确地反映实际样品中水分分布及含量。

关键词：猪肉制样水分分布低场核磁共振

Effect of basic fibroblast growth factor on cat corneal endothelial cell proliferation

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International Journal of Ophthalmology(English edition) 2011年第4期4卷 384-387页

作者： Wen-Juan Luo Yang zhou mei-guang Liu and Chuan-Fu Wang Department of Ophthalmology the Affiliated Hospital of Medical College Qingdao University Qingdao 266003 Shandong Province China

AIM: To investigate the function of basic fibroblast growth factor (bFGF) on cat corneal endothelial cells proliferation. METHODS: Cat corneal endothelial cells were primarily cultured, stimulated with bFGF for different period, the proliferation of cells was assayed by modified tertrozalium salt (MTT) method, and the morphologic changes were observed with inverted phase contrast microscope and transmission electron microscope. RESULTS: At 1, 3 and 5 days after bFGF was added to cat corneal endothelial cells, the result of MTT in 490nm showed significant difference than that in control group, and the difference was most significant in 10ng/mL group. CONCLUSION: bFGF can promote proliferation of cat corneal endothelial cells. 10ng/mL is the relatively most effective dose.

关键词： basic fibroblast growth factor corneal endothelial cells modified tertrozalium salt assay

Flotillin-1 downregulates K^＋ current by directly ：oupling with Kv2.1 subunit

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Protein & Cell 2016年第6期7卷 455-460页

作者： Rui Liu guang Yang MengHua zhou Yu He YanAi mei Yu Ding School of Life Sciences Institutes of Brain Science and State Key Laboratory of Medical Neurobiology Fudan University Shanghai 200438 China. School of Life Sciences Institutes of Brain Science and State Key Laboratory of Medical Neurobiology Fudan University Shanghai 200438 China. yamei@***. School of Life Sciences Institutes of Brain Science and State Key Laboratory of Medical Neurobiology Fudan University Shanghai 200438 China. yuding@***.

Dear Editor,Flotillin-1 （Flotl, reggie-2） is a lipid raft-associated scaffolding protein that belongs to a family of proteins characterized by an evolutionarily conserved SPFH domain （Browman et al., 2007; Langhorst et al., 2008）. Although flotillin-1 is ubiquitously expressed, it is known to be highly expressed in brain tissue, and has been shown to serve distinct functions in the nervous system.

关键词： lipid scaffolding belongs

Retrospective analysis of pathological types and imaging features in pancreatic cancer: A comprehensive study

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 121-129页

作者： Yang-Gang Luo mei Wu Hong-guang Chen Pathology Department Xuanhan County People’s HospitalDazhou 636150Sichuan ProvinceChina

BACKGROUND Pancreatic cancer remains one of the most lethal malignancies worldwide,with a poor prognosis often attributed to late *** the correlation between pathological type and imaging features is crucial for early detection and appropriate treatment *** To retrospectively analyze the relationship between different pathological types of pancreatic cancer and their corresponding imaging *** We retrospectively analyzed the data of 500 patients diagnosed with pancreatic cancer between January 2010 and December 2020 at our *** types were determined by histopathological examination of the surgical spe-cimens or biopsy *** imaging features were assessed using computed tomography,magnetic resonance imaging,and endoscopic *** analyses were performed to identify significant associations between pathological types and specific imaging *** There were 320(64%)cases of pancreatic ductal adenocarcinoma,75(15%)of intraductal papillary mucinous neoplasms,50(10%)of neuroendocrine tumors,and 55(11%)of other rare *** imaging features were identified in each pathological *** ductal adenocarcinoma typically presents as a hypodense mass with poorly defined borders on computed tomography,whereas intraductal papillary mucinous neoplasms present as characteristic cystic lesions with mural *** tumors often appear as hypervascular lesions in contrast-enhanced *** analysis revealed significant correlations between specific imaging features and pathological types(P<0.001).CONCLUSION This study demonstrated a strong association between the pathological types of pancreatic cancer and imaging *** findings can enhance the accuracy of noninvasive diagnosis and guide personalized treatment approaches.

关键词： Pancreatic cancer Pathological types Imaging features Retrospective analysis Diagnostic accuracy

Effect of cooling rate on the crystallization behavior of perovskite in high titanium-bearing blast furnace slag

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International Journal of Minerals,Metallurgy and Materials 2014年第11期21卷 1052-1061页

作者： Lu Liu mei-long Hu Chen-guang Bai Xue-wei Lü Yu-zhou Xu Qing-yu Deng College of Materials Science and Engineering Chongqing University

The effect of cooling rate on the crystallization of perovskite in high Ti-bearing blast furnace（BF） slag was studied using confocal scanning laser microscopy（CSLM）. Results showed that perovskite was the primary phase formed during the cooling of slag. On the slag surface, the growth of perovskite proceeded via the successive production of quasi-particles along straight lines, which further extended in certain directions. The morphology and structure of perovskite was found to vary as a function of cooling rate. At cooling rates of 10 and 30 K/min, the dendritic arms of perovskite crossed obliquely, while they were orthogonal at a cooling rate of 20 K/min and hexagonal at cooling rates of 40 and 50 K/min. These three crystal morphologies thus obtained at different cooling rates respectively corresponded to the orthorhombic, cubic and hexagonal crystal structures of perovskite. The observed change in the structure of perovskite could probably be attributed to the deficiency of O^2-, when Ti2O3 was involved in the formation of perovskite.

关键词： blast furnace slag perovskite crystallization cooling rate

Systematic diesel molecular performance evaluation based on quantitative structure-property relationship model

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Petroleum Science 2022年第2期19卷 809-818页

作者： guang-Qing Cai Lin-zhou Zhang State Key Laboratory of Heavy Oil Processing Petroleum Molecular Engineering Center(PMEC)China University of PetroleumBeijing 102249China

The production and separation of optimal molecules in diesel fuels require a systematic property evaluation for the containing *** paper evaluates the diesel molecules based on four key quality indicators:low-temperature fluidity,cleanliness,ignition,and power *** established the corresponding quantitative structure-property relationship models for corresponding properties,which are freezing point,yield sooting index,cetane number,and combustion *** models were applied for the screening of the high-performance molecules that is suitable for *** molecular performance distribution of the conventional diesel and biodiesel were also ***,we analyzed the effect of different transformation paths on molecular properties,giving guidance on the conversion process design.

关键词： Diesel Optimal molecules QSPR Molecular screening

Current research on electrospinning of silk fibroin and its blends with natural and synthetic biodegradable polymers

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Frontiers of Materials Science 2013年第2期7卷 129-142页

作者： Jian-guang ZHANG Xiu-mei MO Biomaterials and Tissue Engineering Lab College of Chemistry Chemical Engineering & Biotechnology Donghua University Shanghai 201620 China

Silk fibroin （SF） is a kind of natural polymers with a great potential in biomedical application. Due to its good biocompatibility, biodegradability and minimal inflammatory reaction, SF is an excellent candidate for generating tissue engineering scaffolds. Electrospinning is a simple and effective method to fabricate nanofibers, which has several amazing characteristics such as very large surface area to volume ratio, flexibility in surface functionalities, and superior mechanical performance. The electro- spun nanofibers from SF and its blends have been used for varied tissue engineering. This paper will give a brief review about the structure, properties and applications of SF and blend nanofibers via electrospinning.

关键词： electrospinning nanofiber silk fibroin (SF) biodegradable polymer

How to Recognize Nonexpansive Mappings and Isometric Mappings

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Acta Mathematica Sinica,English Series 2011年第10期27卷 1959-1966页

作者： guang Gui DING Yu mei MA School of Mathematical Sciences and LPMC Nankai University Tianjin 300071 P. R. China Department of Applied Mathematics Dalian Nationality University Liaoning 116600 P. R. China

In two real Banach spaces, we shall present two conditions, under one of which each nonexpansive mapping must be an isometry.

关键词： Nonexpansive mapping smooth point weak*-compact set

中国老年人午睡时长和夜间睡眠与抑郁症状的关联:基于2020年CHARLS数据的实证分析

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中国全科医学 2025年第5期28卷 560-567页

作者：周梅杨爱琼邢英王玉玲新疆医科大学第一附属医院干部保健中心新疆维吾尔自治区乌鲁木齐市830054

背景随着我国进入中度老龄化社会,老年人心理健康问题逐年增加,而生活习惯与老年人的心理健康密切相关。目的探讨我国老年人午睡时长、夜间睡眠与抑郁症状的关系,基于生活习惯角度推荐睡眠时间,为老年人抑郁早期防控提供科学依据。方法... 详细信息

背景随着我国进入中度老龄化社会,老年人心理健康问题逐年增加,而生活习惯与老年人的心理健康密切相关。目的探讨我国老年人午睡时长、夜间睡眠与抑郁症状的关系,基于生活习惯角度推荐睡眠时间,为老年人抑郁早期防控提供科学依据。方法基于2023-11-16公开发布第五轮(2020年)中国健康与养老追踪调查项目(CHARLS),纳入符合研究标准的8233名为研究对象。采用抑郁评定量表(CSE-D10)评估老年人抑郁症状,午睡时长划分5级:不午睡、<30 min、30~59 min、60~89 min、≥90 min,夜间睡眠分为5级:≥8 h、7~<8 h、6~<7 h、5~<6 h、<5 h。采用多因素Logistic回归分析探究影响老年人发生抑郁症状的因素,随机森林模型分析午睡时长、夜间睡眠在老年人发生抑郁症状中的重要程度,限制性立方样条曲线进一步探索午睡时长、夜间睡眠时长与抑郁症状发生风险之间的剂量-反应关系。结果2020年调查期间,中国老年人抑郁症状的发生率为24.84%(2045/8233)。多因素Logistic回归分析结果显示,午睡时长30~59 min是老年人发生抑郁症状的保护因素(OR=0.814,95%CI=0.673~0.985,P=0.034),夜间睡眠时间<5 h是老年人发生抑郁症状的危险因素(OR=1.705,95%CI=1.435~2.027,P<0.001)。女性、未婚/分居/离异/丧偶、失能、身体疼痛、强度体力活动、自评健康状况下降、生活满意度下降、卒中、帕金森病会增加老年人发生抑郁症状的风险(P<0.05)。随机森林模型显示,午睡时长、夜间睡眠时间对抑郁症状影响的重要性较高。午睡时长与发生抑郁症状之间存在非线性关系(P_(nonlinear)<0.05),老年人发生抑郁症的风险在午睡时长30 min后随着时间的增加而持续降低,最低水平约为50 min,午睡时长超过75 min后抑郁症状的发生风险会增加。老年人患抑郁症状的发生风险在夜间睡眠6 h后随着时间的增加而持续降低,最低水平约为7 h,睡眠时间超过9 h后抑郁的风险会增加(Poverall<0.05)。结论中国老年人群抑郁症的患病率较高(24.84%),午睡时长、夜间睡眠的持续时间与抑郁症之间呈J型关系,建议老年人每天午睡30~75 min,适度的午睡时长有效降低老年人发生抑郁症状的风险,同时夜间睡眠6~9 h降低抑郁症状的发生风险,对老年人群抑郁症的早期防控具有一定的意义。

关键词：抑郁老年人午睡时长夜间睡眠中国健康与养老追踪调查项目