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Preparation of natural brucite nanofibers by the dispersion method

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Journal of University of Science and Technology Beijing 2008年第4期15卷 489-494页

作者： Li Xu Wen ni Wenping Li Xingde Liu Hailong Yang Xiaoguang Yang State Key Laboratory of the Ministry of Education of China for High-Efficient Mining ＆ Safety of Metal Mines University of Science and Technology Beijing Beijing 100083 China China Electric Power Research Institute Beijing 102401 China Kemeos Aluminate Technologies Ltd. Beijing 100027 China

The preparation of natural brucite nanofibers through dispersion by the wet process is described. The test results indicate that brucite fibers can be well dispersed by using sodium dioctyl sulfosuccinate （ot） as the dispersant at a dispersant/fiber mass ratio of 0.15：1, dispersing for 30 min at a water/solid mass ratio of 20：1. The prepared nanofibers were characterized with X-ray diffraction （XRD）, scanning electron microscope （SEM）, and transmission electron microscope （TEM）. It is shown that the prepared single brucite nanofiber is around 30 nm in diameter and the talus of the nonsingle brucite nanofibers is about 50-150 nm in diameter. Natural brucite mineral fibers were treated by the dispersion method to obtain nanomaterials. These fibers have significant advantages over artificial nanofibers both in yield and in cost.

关键词： brucite nanofiber sodium dioctyl sulfosuccinate (ot) ultrasonic dispersion method

Research progress on naturally-occurring and semi-synthetic ocotillol-type ginsenosides in the genus Panax L.(Araliaceae)

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Chinese Journal of Natural Medicines 2021年第9期19卷 648-655页

作者： niU Xue-ni LUO Wen LV Chong-ning LU Jin-Cai Department of Traditional Chinese Medicine Shenyang Pharmaceutical UniversityShenyang 110016China

Ocotillol(ot)-type ginsenosides,one subtype of ginsenosides,consist of a dammarane skeleton and a tetrahydrofuran *** naturally-occurring ot-type ginsenosides exist in Panax species,particularly in Panax quinquefolius,which may be attributed to the warm and humid climate of its native *** now,merely 28 types of naturally-occurring ot-type ginsenosides have been *** contrast,semi-synthesized ot-type ginsenosides are attracted considerable *** ginsenosides can be obtained through oxidation and cyclization of side chains of dammarane-type ginsenosides,and other methods,which may change their physical and chemical properties and further improve their *** is also notable that the pharmacological activities of ginsenosides are closely related to the stereoisomers caused by the configuration at ***-synthesis of ot-type ginsenosides can facilitate our understanding of the biosynthesis,transformation and metabolism of ot-type ginsenosides in the *** review will systematically summarize the research progress on naturally-occurring and semi-synthetic ot-type ginsenosides,which provides a theoretical basis for their bioactivity-guided research.

关键词： Ocotillol-type ginsenosides Panax species Panax quinquefolius Structure-activity relationship

Studies on surgical methods for sporadic micromedullary thyroid carcinoma

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Oncology and Translational Medicine 2024年第4期10卷 184-189页

作者： Yaqiong ni Xiaofeng Hou Wei Yao Tao Wang Qinjiang Liu Department of Head and Neck Surgery Sun Yat-sen University Cancer Center Gansu HospitalLanzhouGansuChina

Background:To observe the changes in serum calcitonin levels after application of different surgical methods for primary medullary thyroid microcarcinoma(MTMC)and explore a more reasonable surgical ***:A retrospective analysis of 36 patients with MTMC,16 in group A and 20 in group B,was *** group A,tumors were single and confined to the thyroid lobe,and thyroid lobectomy with isthmusectomy was *** group B,tumors were in the isthmus or invaded the thyroid gland,or there were multiple foci in bilateral lobes,and patients with primary foci underwent total *** median follow-up time was 3.6 *** and pathological characteristics and changes in serum calcitonin(CTn)and carcinoembryonic antigen levels after the surgery were compared between the 2 ***:The difference in the biochemical cure rate after surgery was statistically significant between patients with preoperative serum calcitonin levelsnificant differences in the biochemical cure rates and serum calcitonin levels were noted at different time points after surgery between group A and group B(P>0.05).One recurrence and metastasis were observed in each group after ***:After performing different surgical methods for the primary foci of MTMC,the changes in serum calcitonin and carcinoembryonic antigen levels are *** for patients with single foci confined to the thyroid lobe without lateral cervical lymph node metastasis and with serum calcitonin levelsnilateral thyroid lobectomy with isthmectomy can achieve the same therapeutic effect and biochemical cure rate as total thyroidectomy.

关键词： Thyroid papillary carcinoma Surgery Calcitonin Carcinoembryonic antigen

Smart nanoprobe based on two-photon sensitized terbium-carbon dots for dual-mode fluorescence thermometer and antibacterial

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Chinese Chemical Letters 2020年第7期31卷 1792-1796页

作者： Huicheng Yan Hongyuhang ni Yiwei Yang Changfu Shan Xiaoxi Yang Xiangkai Li Jing Cao Wenyu Wu Weisheng Liu Yu Tang State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations School of Life SciencesLanzhou UniversityLanzhou 730000China

Accurate temperature measurement plays an important role in a variety of industrial processes and scientific *** our work,the dual-mode temperature response nanoprobe CDs-Tb-TMPDPA containing a two-photon ligand(4-(2,4,6-trimethoxyphenyl)-pyridine-2,6-dicarboxylic acid,TMPDPA)sensitized Tb3+as a temperature-sensitive unit and carbon dots(CDs)as photothermal reagent and a fluorescence reference unit,have been designed and *** this system,both the fluorescence intensity ratio and the fluorescence lifetime have a good response to *** additio n,due to the excellent photothermal conversion capability of CDs,photothermal antibacterial ability was also *** on the temperature dependence of the fluorescence and the two-photon excitation characteristics of CDs-Tb-TMPDPA,the nanoprobe can also be used in the *** finding opens a new prospect for the use of two-photon sensitized dual-mode fluorescence thermometers.

关键词： Rare-earth Fluorescence lifetime Fluorescence intensity Thermometer Antibacterial

Olfactory Three-Needle Electroacupuncture Improved Synaptic Plasticity and Gut Microbiota of SAMP8 Mice by Stimulating Olfactory Nerve

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Chinese Journal of Integrative Medicine 2024年第8期30卷 729-741页

作者： WANG Yuan ZHENG A-ni YANG Huan WANG Qiang DAI Biao WANG Jia-ju WAN Yi-tong LIU Zhi-bin LIU Si-yang College of Acu-moxibustion and Massage Shaanxi University of Chinese MedicineXianyangShaanxi Province712046China Shaanxi Key Laboratory of Acupuncture and Medicine Shaanxi University of Chinese MedicineXianyangShaanxi Province712046China The Second Affiliated Hospital of Shaanxi University of Chinese Medicine XianyangShaanxi Province712000China Department of Traditional Chinese Medicine Baotou Medical CollegeBaotouInner Mongolia Autonomous Region014040China School of Basic Medical Sciences Xi’an Medical UniversityXi’an710021China

Objective To investigate the effects and mechanisms of olfactory three-needle(otN)electroacupuncture(EA)stimulation of the olfactory system on cognitive dysfunction,synaptic plasticity,and the gut microbiota in senescence-accelerated mouse prone 8(SAMP8)*** Thirty-six SAMP8 mice were randomly divided into the SAMP8(P8),SAMP8+otN(P8-ot),and SAMP8+nerve transection+otN(P8-N-ot)groups according to a random number table(n=12 per group),and 12 accelerated senescence-resistant(SAMR1)mice were used as the control(R1)*** was performed at the Yintang(GV 29)and bilateral Yingxiang(LI 20)acupoints of SAMP8 mice for 4 *** Morris water maze test,transmission electron microscopy,terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling(TUNEL)staining,nissl staining,Golgi staining,Western blot,and 16S rRNA sequencing were performed,*** Compared with the P8 group,otN improved the cognitive behavior of SAMP8 mice,inhibited neuronal apoptosis,increased neuronal activity,and attenuated hippocampal synaptic dysfunction(Poteins N-methyl-D-aspartate receptor 1(NMDAR1),NMDAR2B,synaptophysin(SYN),and postsynaptic density protein-95(PSD95)in hippocampus were increased by otN treatment(PotN greatly enhanced the brain-derived neurotrophic factor(BDNF)/cAMP-response element binding(CREB)signaling and phosphatidylinositol 3-kinase/protein kinase B/mammalian target of rapamycin(PI3K/AKT/mTOR)signaling compared with the P8 group(Potective effect of otN was attenuated by olfactory nerve *** with the P8 group,otN had a very limited effect on the fecal microbial structure and composition of SAMP8 mice,while specifically increased the genera Oscillospira and Sutterella(Pot group showed an abnormal fecal microbiota with higher microbialα-diversity,Firmicutes/Bacter

关键词： Alzheimer's disease olfactory threeneedle electroacupuncture olfactory nerve synaptic plasticity gut microbiota Chinese medicine

Use of oilseed crops biomass for heavy metal treatment in water

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Oil Crop Science 2024年第3期9卷 177-186页

作者： Carlos Pena-Guzman Angela otalvaro-Alvarez Tatiana Jimenez-Ariza Environmental and Sanitation Engineering Program Faculty of EngineeringUniversidad de La SalleBogota111711Colombia Chemical Enineering Program Facultuy of EngineeringUniversidad de La SalleBogota111711Colombia Food Engineering Program Faculty of EngineeringUniversidad de La SalleBogota111711Colombia

The treatment of heavy metals in water is of high importance worldwide,and different treatment types have been *** use of plant material is becoming more and more important,and oilseed crops biomass have been investigated in terms of phytoremediation and biosorption *** article is a review of the literature reporting the applications in 10 different plants and evaluating the removal efficiencies for 12 metals,including the findings of 81 *** olifera and Helianthus annuus are the most studied plants,whereas Cu(21.9%),Cd(18.5%),and Pb(19.9%)are the most studied *** a result,it was found that more than 90%of Pb,Cu,Cd,Fe,Zn,ni,Cr,Sr and Mn showed removals in their *** the same time,the variables most related to the efficiency of metal removal are pH,temperature,and contact *** article includes a review of the biosorption isotherms used in the different studies.

关键词： Oilseed crops Phytoremediation Biosorption Heavy metals

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两株喹啉降解菌代谢途径的分析

中国环境科学 2008年第5期28卷 456-460页

作者：朱顺妮樊丽倪晋仁北京大学深圳研究生院城市人居环境科学与技术重点实验室广东深圳518055 北京大学环境工程系北京100871

从焦化废水处理系统中分离得到2株以喹啉为唯一碳源和氮源生长代谢的降解菌,经形态、生理生化特征及16S rRNA基因的序列分析初步鉴定为Pseudomonas ***6和Rhodococcus ***2.2株菌对喹啉均表现出良好的降解性能,当喹啉初始浓度为150mg/L... 详细信息

从焦化废水处理系统中分离得到2株以喹啉为唯一碳源和氮源生长代谢的降解菌,经形态、生理生化特征及16S rRNA基因的序列分析初步鉴定为Pseudomonas ***6和Rhodococcus ***2.2株菌对喹啉均表现出良好的降解性能,当喹啉初始浓度为150mg/L时,均能在8h内降解完全.QG6对TOC去除率高于QL2.采用HPLC检测到2株菌的中间产物不尽相同,所有被检出的中间产物均比喹啉极性强.GC/MS鉴定结果显示,QG6的中间产物有2-羟基喹啉、8-羟基香豆素和2,3-二羟基苯丙酸,QL2的中间产物包括2-羟基喹啉、2,6-二羟基喹啉和8-羟基香豆素.探讨了降解喹啉的2条不同代谢途径.

关键词：喹啉生物降解 Pseudomonas sp.QG6 Rhodococcus sp.QL2 中间产物

基于金担载氧化钨纳米线的高性能三乙胺气体传感器研究

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传感技术学报 2022年第9期35卷 1157-1166页

作者：王涛张博倪屹江南大学电子工程系物联网技术应用教育部工程研究中心江苏无锡214122

作为一种有害性气体,三乙胺的检测备受关注。实际上,研究人员近年来已开发出基于多种敏感材料的三乙胺传感器。然而,梳理发现,现有三乙胺传感器的工作温度普遍偏高,且对低浓度三乙胺的检测潜力有限。借助静电纺丝法和高温煅烧工艺,成功... 详细信息

作为一种有害性气体,三乙胺的检测备受关注。实际上,研究人员近年来已开发出基于多种敏感材料的三乙胺传感器。然而,梳理发现,现有三乙胺传感器的工作温度普遍偏高,且对低浓度三乙胺的检测潜力有限。借助静电纺丝法和高温煅烧工艺,成功制备出金担载的氧化钨纳米线。利用X射线粉末衍射、X射线光电子能谱、场发射扫描电子显微镜、透射电子显微镜等手段对样品的微观结构和形貌进行了详尽表征。气敏测试表明,金担载的氧化钨对20×10^(-6)三乙胺的最佳检测温度较纯氧化钨降低了40℃,响应值却提升了4倍。最后给出了相应的敏感机理。

关键词：气体传感器三乙胺检测静电纺丝氧化钨金担载

The function of central 5-HT-hypothalamus ot-colonic ot receptor axis

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The function of central 5-HT-hypothalamus OT-colonic OT rece...