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磁性浮珠VMB@Fe_(3)O_(4)@CS对鱼腥藻和微囊藻的去除

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中国环境科学 2024年第3期44卷 1526-1533页

作者：车文露赵岩张高山李彦鹏长安大学水利与环境学院陕西西安710054 长安大学旱区地下水文与生态效应教育部重点实验室陕西西安710054

为了有效处理有害藻华,并避免化学物质二次污染,结合磁絮凝与浮珠浮选方法,以玻化微珠、Fe_(3)O_(4)、壳聚糖为原料合成磁浮珠VMB@Fe_(3)O_(4)@CS,对水华鱼腥藻和铜绿微囊藻进行去除实验.结果表明,磁浮珠对2种水华藻的最佳去除效率分别... 详细信息

为了有效处理有害藻华,并避免化学物质二次污染,结合磁絮凝与浮珠浮选方法,以玻化微珠、Fe_(3)O_(4)、壳聚糖为原料合成磁浮珠VMB@Fe_(3)O_(4)@CS,对水华鱼腥藻和铜绿微囊藻进行去除实验.结果表明,磁浮珠对2种水华藻的最佳去除效率分别达到99.01%(0.12g/L)、98.6%(0.21g/L).VMB@Fe_(3)O_(4)@CS在较宽的pH值范围(4~10)和水温范围(5℃~35℃)内实现较高的去除率(>60%),离子强度的增加对微藻的去除起负面影响.通过形态学观察、表面疏水率及Zeta电位分析确定静电吸引、吸附架桥是磁浮珠对藻细胞主要的絮凝机理.制备的VMB@Fe_(3)O_(4)@CS去除有害藻华具有很大应用潜力.

关键词：有害藻华磁性浮珠浮选絮凝

Clinical outcomes of small incision lenticule extraction versus femtosecond laser-assisted LASIK for myopia: a Meta-analysis

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International Journal of Ophthalmology(English edition) 2017年第9期10卷 1436-1445页

作者： Huan yan li-yan Gong Wei Huang yan-li peng Department of Ophthalmology the Second Affiliated Hospital of Chongqing Medical University Chongqing Medical University Department of Ophthalmology Chongqing Aier-Mega Eye Hospital Aier Eye Hospital Group Aier School of Ophthalmology Central South University

AIM：To evaluate the possible differences in visual quality between small incision lenticule extraction（SMILE）and femtosecond laser in situ keratomileusis（FS-LASIK）for ***：A Meta-analysis was *** were from previously reported comparative studies treated with SMILE versus *** Pub Med,EMBASE,Cochrane,Web of Science and Chinese databases（*** and CNKI）were searched in *** 2016 using Rev Man 5.1 version *** differences in visual acuity,aberration and biomechanical effects within six months postoperatively were ***-seven studies including 4223 eyes were ***：No significant differences were observed between SMILE and FS-LASIK in terms of the proportion of eyes that lost one or more lines of corrected distance visual acuity after surgery（P=0.14）,the proportion of eyes achieving an uncorrected distance visual acuity of 20/20or better（P=0.43）,the final refractive spherical equivalent（P=0.89）,the refractive spherical equivalent within±1.00diopter of the target values（P=0.80）,vertical coma（P=0.45）and horizontal coma（P=0.06）.Compared with the FSLASIK group,total higher-order aberration（P〈0.001）and spherical aberration（P〈0.001）were higher and the decrease in corneal hysteresis（P=0.0005）and corneal resistance factor（P=0.02）were lower in the SMILE ***：SMILE and FS-LASIK are comparable in efficacy,safety and predictability for correcting ***,the aberration in the SMILE group is superior to that in the FS-LASIK group,and the loss of biomechanical effects may occur less frequently after SMILE than after FS-LASIK.

关键词： Meta-analysis small incision lenticuleextraction femtosecond laser in situ keratomileusis myopia

不同土地利用类型对云南苍山东坡姬蜂科昆虫群落结构和物种多样性的影响

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昆虫学报 2024年第5期67卷 692-699页

作者：阳霞李金库谭坤李延鹏黄志旁 Alexey RESHCHIKOV 肖文大理大学东喜玛拉雅研究院大理671003 西南林业大学生物多样性保护与利用学院云南省高校极小种群野生动物保育重点实验室昆明650224 云南省“中国三江并流区域生物多样性协同创新中心” 大理671003 云岭滇金丝猴云南省野外科学观测研究站大理671003 国际生物多样性与灵长类保护中心大理671003

【目的】为了解不同土地利用类型对姬蜂科(Ichneumonidae)昆虫个体数、优势类群和动态变化的影响。【方法】于2018年10月至2019年9月,在云南大理白族自治州苍山东坡海拔2300 m区域利用马来氏网法收集天然林和茶园姬蜂科昆虫,分析两种生... 详细信息

【目的】为了解不同土地利用类型对姬蜂科(Ichneumonidae)昆虫个体数、优势类群和动态变化的影响。【方法】于2018年10月至2019年9月,在云南大理白族自治州苍山东坡海拔2300 m区域利用马来氏网法收集天然林和茶园姬蜂科昆虫,分析两种生境中姬蜂科昆虫生物量、亚科数、群落结构和亚科多样性差异。【结果】2018年10月至2019年9月从云南大理苍山东坡天然林和茶园中共收集到姬蜂科昆虫2259头,分属23个亚科,其中天然林中1551头,分属22个亚科;茶园中708头,分属21个亚科。天然林中每月姬蜂科昆虫个体数高于茶园中的,两种生境中每月姬蜂科昆虫亚科数无显著差异;天然林中姬蜂科昆虫月亚科数波动趋势分别在6月和12月呈较高的双峰型,茶园中姬蜂科昆虫月亚科数波动无峰值;两种生境中姬蜂科昆虫群落组成有显著差异,天然林中独有优势亚科为肿跗姬蜂亚科(Anomaloninae),茶园中独有优势亚科为粗角姬蜂亚科(Phygadeuoninae),两种生境中共有优势亚科为缝姬蜂亚科(Campopleginae)和拱脸姬蜂亚科(Orthocentrinae),但出现高峰不同;天然林和茶园中每月姬蜂科昆虫亚科多样性指数和丰富度无显著差异。【结论】苍山东坡低海拔区域茶园与天然林相比,姬蜂科昆虫个体总数降低,姬蜂科昆虫群落结构、优势类群和全年个体数动态发生变化。为保护好姬蜂科昆虫这类生物防治昆虫,建议保护好原始的植被和土地利用类型。

关键词：姬蜂科群落结构亚科多样性动态监测生境退化苍山

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内镜腰椎间盘切除术后复发的因素及预测模型

中国矫形外科杂志 2024年第9期32卷 775-780页

作者：梁啸李东儒陈筱王叶新李衍朋高龙飞孟纯阳济宁医学院附属医院脊柱外科山东济宁272000 济宁医学院临床医学院山东济宁272000

[目的]探讨经皮内镜腰椎间盘切除术(percutaneous lumbar endoscopic discectomy,PELD)后复发性椎间盘突出(recurrent lumbar disc herniation,rLDH)的影响因素并建立预测模型。[方法]回顾性分析2017年1月—2020年1月作者采用PELD治疗的腰椎间盘突出症的286患者的临床资料。根据术后3年内是否出现复发分为复发组和未复发组,采用单因素比较和多因素逻辑回归分析,筛选出复发的相关因素,并建立数学预测模型,采用受试者工作特征(ROC)曲线等分析以评估模型的临床价值。[结果]286例患者中,44例确诊为复发,占15.4%;242例未复发,占84.6%。单因素比较表明,复发组的BMI[(25.8±3.0)vs(24.2±3.3),P=0.004]和病程[(17.9±18.3)个月vs(10.7±16.8)个月,P=0.01]均显著大于未复发组;复发组的术前影像Modic改变显著多于未复发组[无/有,(30/14)vs(206/36),P=0.006];复发组术前影像测量椎间ROM显著大于未复发组[(9.3±3.4)°vs(7.1±2.8)°,P<0.001];复发组经椎间孔入路手术比率显著大于未复发组[TF/IL,(29/15)vs(114/128),P=0.022]。逻辑回归表明,BMI(OR=1.154,95%CI 1.031~1.291,P=0.013)、病程(OR=1.023,95%CI 1.005~1.042,P=0.013)、Modic改变(OR=3.143,95%CI 1.369~7.070,P=0.007)、椎间ROM(OR=1.264,95%CI 1.126~1.419,P<0.001)和手术入路(椎间孔/椎板间)(OR=2.104,95%CI 1.007~4.396,P=0.048)是复发的独立危险因素。按逻辑回归得出预测模型,其预测值ROC分析的曲线下面积为(AUC)为0.787(95%CI 0.721~0.853);模型校准曲线与实际曲线一致性较好;决策曲线分析表明,风险阈值为10%~50%时,该模型可产生较大净获益。[结论]本研究表明BMI、病程、术前Modic改变、术前椎间ROM和手术入路是PELD术后rLDH的危险因素。本研究得出预测rLDH模型可能帮助临床医生判断术后复发风险。

关键词：腰椎间盘突出症经皮内镜椎间盘切除术复发性椎间盘突出危险因素预测模型

Controllable heterogeneous interfaces and dielectric regulation of hollow raspberry-shaped Fe_(3)O_(4)@rGO hybrids for high-performance electromagnetic wave absorption

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Journal of Materials Science & Technology 2023年第20期151卷 10-18页

作者： Yuhan Wu Shujuan Tan Puyu liu yan Zhang peng li Guangbin Ji College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Heterogeneous interface engineering is closely related to the structural design of electromagnetic absorbers;thus,the interface control through structural design is a considerable approach to optimize the electromagnetic wave absorption(EWA)***,the 3D hierarchical structure composites composed of two-dimensional reduced graphite oxide(rGO)and hollow raspberry Fe_(3)O_(4) nanoparticles was successfully fabricated by a simple pyrolysis and self-assembly *** specific structure enriches the characteristics of interface polarization and dipole polarization,which further induces significant EWA *** adjusting the amount of graphite oxide(GO),the complex dielectric constant of the obtained hybrids can be controlled,and the heterointerface can be cleverly *** minimum reflection loss(RLmin)of the typical products can be up to−73.86 dB at the thickness is only 1.35 mm,and the maximum effective absorption bandwidth(EAB)can reach 5.1 *** work demonstrates that the unique structure and tunable components can fully improve the potential of electromagnetic absorption performance,which provides basic guidance for the heterogeneous interface engineering of efficient electromagnetic functional materials.

关键词： Electromagnetic wave absorption Dielectric regulation Self-assemble Hierarchical structure Composites

A Micro-layer Model for the Lubrication Effect Near Collisions of Immersed Particles

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过程工程学报 2006年第Z2期6卷 379-384页

作者：李彦鹏 School of Environmental Science and Engineering Chang'an University

A micro-layer model is proposed to account for the lubrication effect of liquid layer near collisions of immersed particles at moderate particle Reynolds *** new model is to allow determination of the pressure profile within the micro-layer including the fluid inertia and *** a correction based on the micro-layer model is applied to unsteady 3-D direct simulation of a particle approaching another *** simulation is based on a modified immersed boundary method with direct force *** quantitative agreement between numerical and experimental results validates the model presented in the *** simulation results show that the fluid is squeezed prior to *** a particle approaches a flat wall or another particle,the lubrication force,obtained by integrating the pressure profile over the particle surface,is increased and prevents the particle from *** model predicts that the velocity of approaching particle starts to decrease when separation distance of particles is less than 0.1dp,where dp is the particle diameter.

关键词： lubrication effect micro-layer model immersed boundary method

Metagenomic analysis reveals presence of different animal viruses in commercial fetal bovine serum and trypsin

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Zoological Research 2022年第5期43卷 756-766页

作者： peng Zhang Le Cao Ying-Ying Ma Bin Su Chi-Yu Zhang yan-peng li Shanghai Public Health Clinical Center Fudan UniversityShanghai 201508China Beijing Key Laboratory for HIV/AIDS Research Beijing Youan HospitalCapital Medical UniversityBeijing 100069China

Animal-derived biological products, such as fetal bovine serum(FBS) and trypsin, are important supplements for scientific, pharmaceutical, and medical use. Although preventive guidelines and tests are implemented to reduce potential viral contamination in these biologicals, they do not target unusual or emerging viruses, leading to safety concerns. Using unbiased metagenomics, we investigated the presence of viruses in recently collected commercial FBS and trypsin samples from different geographic regions. In total, we detected viralsequencesbelongingto Parvoviridae,Anelloviridae,Flaviviridae,Herpesviridae,Caliciviridae, Nodaviridae, Rhabdoviridae, and Paramyxoviridae, including several viruses related to bovine diseases, viruses of potential human and insect origin, and viruses of unknown origin. Bovine parvovirus 3 and bosavirus were detected with high frequency and abundance in FBS, necessitating more stringent testing for these parvoviruses during production. Both bovine norovirus and bovine viral diarrhea virus 1 displayed relatively high genetic distance to closest hits, indicating the presence of new genotypes in farm animals. While the origin of novel lyssavirus and Nipah virus is unclear, their presence raises the possibility of the introduction of pathogenic animal-derived viruses into *** results showed relatively widespread contamination of different viruses in biologicals,underscoring the need for robust safety protocol alternatives, such as metagenomic sequencing, to monitor emerging viruses.

关键词： Virome FBS Trypsin Biosafety Viral contaminations

分化型甲状腺癌^(131)I治疗后颈部转移淋巴结与刺激状态下甲状腺球蛋白之间关系

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医药论坛杂志 2024年第12期45卷 1238-1242页

作者：李祥周李彦鹏温鑫闫志华程兵郑州大学第一附属医院核医学科郑州450003

目的探讨分化型甲状腺癌(differentiated thyroid cancer,DTC)术后^(131)I治疗后局部淋巴结转移与刺激状态下甲状腺球蛋白(stimulated thyroglobulin,sTg)之间关系。方法回顾性分析2016年9月至2020年9月于郑州大学第一附属医院核医学科... 详细信息

目的探讨分化型甲状腺癌(differentiated thyroid cancer,DTC)术后^(131)I治疗后局部淋巴结转移与刺激状态下甲状腺球蛋白(stimulated thyroglobulin,sTg)之间关系。方法回顾性分析2016年9月至2020年9月于郑州大学第一附属医院核医学科行^(131)I 100~150 mCi治疗157例的分化型甲状腺癌患者临床资料,所有患者^(131)I治疗4~5月后停服左甲状腺素钠片3~4周均确诊颈部淋巴结转移病灶。统计患者颈部转移淋巴结个数及直径、颈部淋巴结分区、sTg、性别等临床资料。对sTg值与颈部转移淋巴结病灶个数及直径之间行Spearman相关分析;对于颈部淋巴结复发不同区域之间、sTg阳性与sTg阴性组间患者性别、患者病灶复发部位(颈部单侧或双侧)间差异行χ^(2)检验;对sTg阳性与sTg阴性组间患者所检出病灶个数行t检验。结果在刺激状态下,157例颈部淋巴结转移患者中,Ⅲ区与Ⅳ区是常见转移部位(P<0.05),颈部单侧转移较双侧转移多见(P<0.05)。sTg与颈部转移淋巴结个数及直径之间成线性关系(分别为r=0.517、P<0.05;r=0.361、P<0.05);sTg阳性与sTg阴性患者中性别、病灶数目、病灶复发部位之间差别有统计学意义(P<0.05)。结论sTg可作为DTC术后^(131)I治疗后肿瘤标志物,能反映DTC患者^(131)I治疗后颈部复发淋巴结个数与大小;且sTg阳性与sTg阴性患者之间性别、病灶数目及病灶部位之间有差别;但sTg阴性,不能排除体内无转移病灶。

关键词：分化型甲状腺癌甲状腺球蛋白甲状腺球蛋白抗体 ^(131)I 颈部淋巴结

Two New Gallotannins from Pistacia weinmannifolia

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Chinese Chemical Letters 2000年第1期11卷 53-56页

作者： Ai Jun HOU li yan peng yan Ze liU Zhong Wen liN Han Dong SUN Laboratory of phytochemistry Kunming Institute of BotanyChinese Academy of SciencesKunming 650204 Department of Phytochemistry Henan College of Traditional Chinese MedicieZhengzhou 450003

Two new gallotannins, pistafolins A (1) and B (2), were isolated from the leaf extract of Pistacia weinmannifolia. Their structures were determined by spectral methods.

关键词： Pistacia weinmannifolia Anacardiaceae gallotannin pistafolin A pistafolin B