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深圳市福田区中学生生殖健康知识来源及需求分析

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中国妇幼卫生杂志 2017年第1期8卷 35-38,42页

作者：朱丹玲马健廖慧霞王小倩吴紫娟深圳市福田区妇幼保健院 518048

目的了解深圳市福田区中学生生殖健康知识的基本情况、来源及需求,为有针对性地开展青春期生殖健康教育提供依据。方法采用随机整群抽样法,对深圳市福田区1029名学生进行问卷调查。结果 1029名学生首次接触性教育的时间主要在初中时期,... 详细信息

目的了解深圳市福田区中学生生殖健康知识的基本情况、来源及需求,为有针对性地开展青春期生殖健康教育提供依据。方法采用随机整群抽样法,对深圳市福田区1029名学生进行问卷调查。结果 1029名学生首次接触性教育的时间主要在初中时期,与其自评需要获得性教育的时间是一致的。受检学生生殖健康知识掌握程度较高,常见问题知晓率达66.2%,对月经、遗精、性冲动的知晓率分别为83.1%、76.4%、82.8%。学校、网络影视、同学同伴是中学生性知识的主要来源,从父母处获取性知识的比例低,女生为36%,而男生仅为16.8%。受检学生在性教育方式的选择上,依次主要为讲座、视频、宣传册、人体模型讲解;在性教育的内容需求方面,依次主要为性心理知识、性生理知识及性的选择与责任。结论深圳市福田区中学生生殖健康知识知晓率高,但性心理教育及引导需求明显;学生性知识获取途径多样化,但家庭性教育比重低。今后需重视青春期心理引导及教育,发挥家庭性教育的优势,充分整合学校、医院及家庭各方资源,探索青春期生殖健康最佳教育模式。

关键词：中学生生殖健康性知识

Simultaneous elution of polycyclic aromatic hydrocarbons and heavy metals from contaminated soil by two amino acids derived from β-cyclodextrins

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Journal of Environmental Sciences 2010年第12期22卷 1910-1915页

作者： Chengjian Yang Qingru Zeng Yunzhong Wang Bohan liao jian Sun hui Shi Xingdou Chen School of Environment & Municipal Engineering Xi'an Architecture Science Technology University Xi'an 710055 China. Department of Environmental Science Hunan Agricultural University Changsha 410128 China Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area Department of Environmental Science and Engineering South China University of Technology Guangzhou 510006 China

Two highly water-soluble amino acids, which derived from β-CDs, i.e., glutamic acid-β-cyclodextrin （GluCD） and ethylene-diamine- β-cyclodextrin （EDCD）, were synthesized and were examined for their effect on solubilization of anthracene （ANT）, complexation of cadmium （Cd^2＋）, and elution removal of ANT and Cd^2＋ in soil. The results showed that GluCD and EDCD were powerful complexant for ANT and Cd^2＋. In the presence of 10 g/L GIuCD and EDCD, the solubilization of ANT increased by 47.04 and 23.85 times compared to the control, respectively. GluCD resulted in approximately 90% complexation of Cd^2＋ while 70% complexation was observed for EDCD. Simultaneously, GluCD and EDCD could greatly enhance the elution removal of ANT and Cd^2＋ from soil. GluCD resulted in the highest elution efficiency of ANT and Cd^2＋. With the addition of 10 g/L GluCD, 53.5% of ANT and 85.6% of Cd^2＋ were eluted, respectively. The ANT had a negligible effect on the Cd^2＋ removal due to different complexing sites of ANT and Cd^2＋, while Cd^2＋ enhanced the ANT removal under the addition of GluCD because Cd^2＋ neutralized the -COOH group of GIuCD. Adversely, the removal of ANT was decreased with Cd^2＋ under the addition of EDCD, this was due to the fact that Cd^2＋ enhanced the polarity of EDCD molecule and inhibited the complexation between ANT and EDCD. The study suggested that GluCD could be preferred and be successfully applied to remediation of heavy metals or organic compounds in contaminated soil.

关键词： anthracene cadmium cyclodextrin solubilization elution soil

Synergistic extraction and separation of thorium from rare earths in chloride media using mixture of Cextrant 230 and Cyanex 923

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Journal of Rare Earths 2024年第4期42卷 759-767页

作者： hui Wang Shengting Kuang Wuping liao School of Rare Earths University of Science and Technology of ChinaHefei230026China Institute of Material and Chemistry Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou341000China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China

In order to lower the usage of expensive Cyanex 923 and increase the extraction capacity of the system of Cextrant 230,the synergistic extraction of thorium from chloride media by a mixture of Cextrant 230 and Cyanex 923 was *** maximum synergistic enhancement coefficient(R)of 1.53 is obtained at 1:1 molar ratio of Cextrant 230/Cyanex *** syne rgistic extracted species of Th^(4+)is determined as ThCl_(4)·2Cextrant 230·Cyanex *** synergistic extraction of Th^(4+)is an entropy-driven exothermic *** loading capacity of 0.60 mol/L mixed extractant for thorium is about 17.10 g/L(calculated as ThO_(2)),and the loaded thorium in the organic phase can be effectively stripped by distilled *** comparison,rare earth cations are barely extracted under the similar conditions,suggesting that the mixtures can be applied to separate thorium from rare earths.A cascade extraction process was developed based on the synergistic extraction system to separate thorium from the hydrochloric acid leaching of *** content of thorium in the leaching solution decreases obviously from 19.90 mg/L to1.4μg/L by 3 stages of extraction,which is superior to sole Cextrant 230 or Cyanex *** introduction of Cextrant 230 into the extraction system not only lowers the usage of Cyanex 923 but also enhances the selective extraction of thorium at low acidity,implying that the synergistic extraction system can selectively extract thorium more efficiently and economically than the sole systems.

关键词： Synergistic extraction Cextrant 230 Cyanex 923 Thorium Rare earths

Synthesis and Anticancer Effect of gem-Difluoromethylenated Chrysin Derivatives

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Chinese Chemical Letters 2006年第11期17卷 1439-1442页

作者： Xing ZHENG jian Guo CAO Duan Fang liao Bing Yang ZHU hui Ting LIU Institute of Pharmacy ＆ Pharmacology Nanhua University Hengyang 421001 Cancer Research Institute Nanhua University Hengyang 421001

Ten gem-difluoromethylenated chrysin derivatives were prepared and their anticancer activities in vitro were evaluated by the standard MTT method. The results of biological test showed that some of gem-difluoromethyle... 详细信息

关键词： Anticancer activity gem-difluoromethylenated chrysin.

Responses of Earthworms to Organic Matter at Different Stages of Decomposition

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Pedosphere 2009年第3期19卷 382-388页

作者： LI jian-Xiong ZHANG Wei-Xin liao Chong-hui YANG Yue-Ping FU Sheng-Lei Guangdong Entomological Institute Guangdong Academy of Sciences Guangzhou 510260 （China） Institute of Ecology South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 （China） Graduate University of the Chinese Academy of Sciences Beijing 100049 （China）

This study was conducted to examine the responses of earthworms to soil organic matter and litter at different decomposition stages and their contributions in litter decomposition processes in southern subtropical areas of China. Two plantations were selected as the study sites: Site I was dominated by the exotic endogeic earthworm species Ocnerodrilus occidentalis; Site II was dominated by epigeic species Amynthas corticis. After the fallen litter and earthworms were removed or expelled, four treatments were set up as: reserving the top soil (0–5 cm, equal to H layer) (H), removing the top soil and adding fresh litter (Le), removing the top soil and adding semi-decomposed litter (Li), and a control with no top soil nor any litter (CK). Five randomized blocks that were enclosed with nylon nets on the top were set up in each site, and then the four treatments were arranged randomly in each block. After 2–3 months, earthworms were collected using the formalin method. The results showed that Ocnerodrilus occidentalis preferred Treatment H though it was found in Treatments Le and Li as well; Amynthas corticis preferred Treatment Li though sometimes it also appeared in Treatment H; and Amynthas sp., another epigeic species, was mainly present under Treatment Le and only appeared in Treatment H occasionally. These findings confirmed that earthworm species belonging to different ecological groups had different responses to organic matter at different decomposition stages. The impacts of earthworm communities dominated by O. occidentalis mainly appeared at the later periods of litter decomposition.

关键词： decomposition stage earthworm litter soil organic matter

Dynamic trust evaluation model for task participants oriented to mobile crowd sensing

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The Journal of China Universities of Posts and Telecommunications 2020年第2期27卷 26-36页

作者： Zhao Guosheng liao Yuting Wang jian College of Computer Science and Information Engineering Harbin Normal UniversityHarbin 150025China School of Computer Science and Technology Harbin University of Science and TechnologyHarbin 150001China

In the mobile crowd sensing(MCS)network environment,it is very important to establish an evolutionary process that can dynamically depict the trust degree of task *** address this issue,this paper proposes a dynamic trust evaluation model for task ***,according to the security requirements and trust strategy of the perceived tasks,the attribute reduction algorithm(ARA)based on rough set is used to obtain the multi-attribute indexes that affect the participants’trust *** the redundant attributes can avoid the lag of trust evaluation and reduce the time ***,the grey correlation analysis method is used to solve the correlation degree between the target sequence and the comparison sequence on the trust attributes by integrating the multi-attribute decision-making method,which avoids the distortion of the trust evaluation caused by human subjective factors and improves the quality of the perceived ***,a dynamic trust evaluation model for participants in complex sensing network environment is *** simulation results show that the proposed model can not only dynamically depict the trust degree of participants in real time,but also have higher accuracy and less time cost.

关键词： MCS trust degree evaluation model grey correlation analysis

Electroacupuncture promotes the recovery of motor neuron function in the anterior horn of the injured spinal cord

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Neural Regeneration Research 2015年第12期10卷 2033-2039页

作者： jian-hui Yang jian-guo Lv hui Wang hui-yong Nie Rehabilitation Center First Affiliated Hospital of Health Science CenterXi’an Jiaotong University

Acupuncture has been shown to lessen the inflammatory reaction after acute spinal cord injury and reduce secondary ***,the mechanism of action remains *** this study,a rat model of spinal cord injury was established by compressing the T8-9 segments using a modified Nystrom ***-four hours after injury,Zusanli（ST36）,Xuanzhong（GB39）,Futu（ST32）and Sanyinjiao（SP6）were stimulated with *** with spinal cord injury alone were used as *** 2,4 and 6 weeks after injury,acetylcholinesterase（ACh E）activity at the site of injury,the number of medium and large neurons in the spinal cord anterior horn,glial cell line-derived neurotrophic factor（GDNF）m RNA expression,and Basso,Beattie and Bresnahan locomotor rating scale scores were greater in the electroacupuncture group compared with the control *** results demonstrate that electroacupuncture increases ACh E activity,up-regulates GDNF m RNA expression,and promotes the recovery of motor neuron function in the anterior horn after spinal cord injury.

关键词： nerve regeneration spinal cord injury electroacupuncture spine injury secondaryinjury acupoint motor neurons acetylcholinesterase glial cell line-derived neurotrophic factor inclined board test Basso, Beattie and Bresnahan locomotor rating scale functional recovery neuralregeneration

Pre-operative enhanced magnetic resonance imaging combined with clinical features predict early recurrence of hepatocellular carcinoma after radical resection

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1192-1203页

作者： jian-Ping Chen Ri-hui Yang Tian-hui Zhang Li-An liao Yu-Ting Guan Hai-Yang Dai Department of Intervention Meizhou People’s HospitalMeizhou 514031Guangdong ProvinceChina Department of Medical Imaging Meizhou People’s HospitalMeizhou 514031Guangdong ProvinceChina Department of Medical Imaging Huizhou Municipal Central HospitalHuizhou 516001Guangdong ProvinceChina

BACKGROUND Indentifying predictive factors for postoperative recurrence of hepatocellular carcinoma(HCC)has great significance for patient *** To explore the value of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid(Gd-EOB-DTPA)enhanced magnetic resonance imaging(MRI)combined with clinical features in predicting early recurrence of HCC after *** A total of 161 patients with pathologically confirmed HCC were *** patients were divided into early recurrence and non-early recurrence group based on the follow-up *** clinical,laboratory,pathological results and Gd-EOB-DTPA enhanced MRI imaging features were *** Of 161 patients,73 had early recurrence and 88 were had non-early *** analysis showed that patient age,gender,serum alpha-fetoprotein level,the Barcelona Clinic Liver Cancer stage,China liver cancer(CNLC)stage,microvascular invasion(MVI),pathological satellite focus,tumor size,tumor number,tumor boundary,tumor capsule,intratumoral necrosis,portal vein tumor thrombus,large vessel invasion,nonperipheral washout,peritumoral enhancement,hepatobiliary phase(HBP)/tumor signal intensity(SI)/peritumoral SI,HBP peritumoral low signal and peritumoral delay enhancement were significantly associated with early recurrence of HCC after *** logistic regression analysis showed that patient age,MVI,CNLC stage,tumor boundary and large vessel invasion were independent predictive *** data validation indicated that the area under the curve of the combined predictors was 0.861,suggesting that multivariate logistic regression was a reasonable predictive model for early recurrence of *** Gd-EOB-DTPA enhanced MRI combined with clinical features would help predicting the early recurrence of HCC after operation.

关键词： Hepatocellular carcinoma Enhanced magnetic resonance imaging Microvascular invasion Hepatobiliary phase Recurrence

Collective effects in an incompressible electronic liquid

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National Science Review 2023年第6期10卷 168-182页

作者： jian-jian Miao hui-Ke Jin Yi Zhou Department of Physics The Chinese University of Hong Kong Department of Physics TQM Technische Universitat Munchen Institute of Physics Chinese Academy of Sciences Songshan Lake Materials Laboratory Kavli Institute for Theoretical Sciences & CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences

Starting from Landau’ s kinetic equation,we show that an electronic liquid in d=2,3 spatial dimensions depicted by a Landau-type effective theory will become incompressible on condition that the Landau parameters satisfy either(ⅰ) 1+F1s/d=0 or(ⅱ) F0s→+∞. Condition(ⅰ) is the Pomeranchuk instability in the current channel and suggests a quantum spin liquid(QSL) state with a spinon Fermi surface;while condition(ⅱ) means that the strong repulsion in the charge channel leads to a conventional charge and thermal *** the collisionless regime(ωτ>>1) and the hydrodynamic regime(ωτ<<1),the zero and first sound modes have been studied and classified by symmetries,including the longitudinal and transverse modes in d=2,3 and the higher angular momentum modes in d=*** sufficient(and/or necessary) conditions of these collective modes have been *** has been demonstrated that some of these collective modes will behave in quite different manners under incompressibility condition(ⅰ) or(ⅱ).Possible nematic QSL states and a hierarchy structure for gapless QSL states have been proposed in d=3.

关键词： quantum spin liquid Landau-type effective theory collective modes zero sound first sound