检索结果-南通市图书馆

Kinetic Adsorption of Ammonium Nitrogen by Substrate Materials for Constructed Wetlands

Pedosphere 2011年第4期21卷 454-463页

作者： ZHU Wen-Ling cui Li-Hua OUYANG Ying long cui-fen TANG Xiao-Dan College of Natural Resources and Environmental Science South China Agricultural University Guangzhou 510642 (China) Urban Drainage Monitoring Station of Guangzhou City Guangzhou 510010 (China) Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions South China Agricultural University Guangzhou 510642 (China) Department of Water Resources St. Johns River Water Management District Palatka Florida 32178 (USA)

Constructed wetlands （CWs） are engineered systems that utilize natural systems including wetland vegetations, soils, and their associated microbial assemblages to assist in treating wastewater. The kinetic adsorption of ammonium nitrogen （NH＋-N） by CW substrate materials such as blast furnace slag （BFS）, zeolite, ceramsite, vermiculite, gravel, paddy soil, red soil, and turf, was investigated using batch experiments and kinetic adsorption isotherms. Both Freundlich and Lang- muir isotherms could adequately predict the NH＋-N adsorption process. The maximum adsorption capacities of NH＋-N, estimated from the Langmuir isotherm, ranked as： zeolite （33 333.33 mg kg^-1）〉 turf （29274.01 mg kg^-1）〉 BFS （5000 mg kg^-1）〉 vermiculite （3333.33 mg kg^-1）〉 gravel （769.23 mg kg^-1）〉 paddy soil （588.24 mg kg^-1）〉 red soil （555.56 mg kg^-1）〉 ceramsite （107.53 mg kg^-1）. Some properties of the substrate materials, including bulk density, specific gravity, hydraulic conductivity, uniformity coefficient （K60）, curvature coefficient （Co）, organic matter, pH, exchangeable （or active） Cu, Fe, Zn and Mn, total Cu, and Fe, Mn, Zn, Cd, Pb and Ca, had negative correlations with NH＋-N adsorption. Other properties of the substrate materials like particle diameter values of D10, 030 and 060 （the diameters of particle sizes of a substrate material at which 10%, 30% and 60%, respectively, of the particles pass through the sieve based on the accumulative frequency）, cation exchange capacity （CEC）, exchangeable （or active） Ca and Mg, and total K and Mg had positive correlations with NH＋-N adsorption. In addition, active K and Na as well as the total Na had significant positive correlations with NH＋-N adsorption. This information would be useful for selection of suitable substrate materials for CWs.

关键词： ammonia removal kinetic adsorption capacity Langmuir isotherm physicochemical properties substrate materials

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The complex effects of miR-146a in the pathogenesis of Alzheimer's disease

引用

Neural Regeneration Research 2025年第5期20卷 1309-1323页

作者： Yunfan long Jiajia Liu Yu Wang Haidong Guo Guohong cui Department of Neurology Shanghai No.9 People’s HospitalShanghai Jiaotong University School of MedicineShanghaiChina Academy of Integrative Medicine Shanghai University of Traditional Chinese MedicineShanghaiChina School of Integrative Medicine Shanghai University of Traditional Chinese MedicineShanghaiChina Department of Neurology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghaiChina

Alzheimer's disease is a neurodegenerative disorder characterized by cognitive dysfunction and behavioral *** plaques formed through the extracellular deposition of amyloid-βproteins,as well as neurofibrillary tangles formed by the intracellular deposition of hyperphosphorylated tau proteins,comprise two typical pathological features of Alzheimer's *** symptomatic treatment,there are no effective therapies for delaying Alzheimer's disease ***(miR)are small,non-coding RNAs that negatively regulate gene expression at the transcriptional and translational levels and play important roles in multiple physiological and pathological ***,miR-146a,a NF-κB-regulated gene,has been extensively implicated in the development of Alzheimer's disease through several *** has demonstrated substantial dysregulation of miR-146a both during the initial phases and throughout the progression of this *** R-146a is believed to reduce amyloid-βdeposition and tau protein hyperphosphorylation through the TLR/IRAK1/TRAF6 pathway;however,there is also evidence supporting that it can promote these processes through many other pathways,thus exacerbating the pathological manifestations of Alzheimer's *** has been widely reported that miR-146a mediates synaptic dysfunction,mitochondrial dysfunction,and neuronal death by targeting m RNAs encoding synapticrelated proteins,mitochondrial-related proteins,and membrane proteins,as well as other *** the impact on glial cells,miR-146a also exhibits differential *** one hand,it causes widespread and sustained inflammation through certain pathways,while on the other hand,it can reverse the polarization of astrocytes and microglia,alleviate neuroinflammation,and promote oligodendrocyte progenitor cell differentiation,thus maintaining the normal function of the myelin sheath and exerting a protective effect on *** this review,we provide a

关键词： Alzheimer's disease amyloid-β glial cells microRNAs miR-146a neuroinflammatory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

两种人工湿地对农村生活污水的净化效果比较

引用

中国给水排水 2012年第23期28卷 117-120页

作者：唐晓丹崔理华郑离妮龙翠芬朱太涛华南农业大学资源环境学院广东广州510642

分别采用复合水平流、垂直流—水平流一体化人工湿地系统处理农村生活污水,并进行比较。一年的运行结果表明,两套湿地系统对农村生活污水中COD、BOD5、NH4+-N、TN、TP等都具有良好的去除效果。复合水平流湿地系统对COD、BOD5、NH4+-N、T... 详细信息

分别采用复合水平流、垂直流—水平流一体化人工湿地系统处理农村生活污水,并进行比较。一年的运行结果表明,两套湿地系统对农村生活污水中COD、BOD5、NH4+-N、TN、TP等都具有良好的去除效果。复合水平流湿地系统对COD、BOD5、NH4+-N、TN、TP的年平均去除率分别为78.6%、75.2%、59.4%、62.7%、66.7%,出水浓度分别为8.0、7.1、8.2、8.6、0.9 mg/L;一体化系统对COD、BOD5、NH4+-N、TN、TP的年平均去除率分别为81.0%、83.4%、89.6%、50.6%、67.9%,出水浓度分别为6.1、4.9、2.2、11.3、0.8 mg/L。其中,出水COD、BOD5、TN值都达到了《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准,TP值达到了一级B标准。垂直流—水平流一体化系统对NH4+-N的去除率明显高于复合水平流系统,但两套系统对COD、BOD5、TN、TP的去除率无明显差异。垂直流—水平流一体化系统的处理效率高、占地面积小,更适于处理农村生活污水。

关键词：复合人工湿地农村生活污水净化效果比较

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparison of microstructure,mechanical property,and degradation rate of Mg-1Li-1Ca and Mg-4Li-1Ca alloys

引用

Bioactive Materials 2023年第8期26卷 279-291页

作者： Li-Xin long fen-fen Chen Lan-Yue cui Ze-Song Wei Hai-Tao Wang Rong-Chang Zeng Yu-feng Zheng College of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China Institute of Corrosion Science and Technology Guangzhou510530China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450002China School of Materials Science and Engineering Peking UniversityBeijing100871China International Research Organization for Advanced Science and Technology(IROAST) Kumamoto University2-39-2 Kumamoto860-8555Japan

Mg-1 wt.%Li-1 wt.%Ca(LX11)and Mg-4 wt.%Li-1 wt.%Ca(LX41)alloys share the same hexagonal closed-packed crystalline ***,the differences in microstructure,mechanical properties,and degradation rates between the two alloys are not well ***,the above three aspects of LX11 and LX41 alloys were studied via optical microscopy,tensile tests,and electrochemical polarization and electrochemical impedance spectroscopy,together with hydrogen *** concentration of the released Mg^(2+),Ca^(2+),and Li+ions was analyzed using a flame atomic absorption *** demonstrated that the LX11 alloy was composed of finerα-Mg grains,fewer twins,and smaller volume fractions of the intermetallic phases Mg_(2)Ca than the LX41 *** increasing Li concentration generated a weak decrease in the yield strength of the Mg-Li-Ca alloys,a remarkable increase in elongation to failure,and a stable ultimate tensile *** LX11 alloy had better corrosion resistance than the LX41 *** release rate of the cations(Mg^(2+),Ca^(2+),and Li+)varied significantly with *** release rate of metallic ions in Hank’s solution cannot reflect the true corrosion rate of Mg-Li-Ca alloys due to the formation of the precipitated corrosion products and their difference in *** dealloying corrosion mechanism of the Mg_(2)Ca phase in Mg-Li-Ca alloys was proposed.

关键词： Magnesium alloys Dealloying Intermetallic compound Biomaterial Ionic release

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Diastereoselective alkylation reactions employing a new camphor-based 2-phenylimino-2-oxazolidine chiral auxiliary

引用

Chinese Chemical Letters 2014年第11期25卷 1466-1468页

作者： long-Duo Zhang cui-fen Lu Zu-Xing Chen Gui-Chun Yang Jun-Qi Nie Hubei Collaborative Innovation Center for Advanced Organochemical Materials & Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules Hubei University

A new camphor-based 2-phenylimino-2-oxazolidine chiral auxiliary was prepared and it was shown to be a particularly effective chiral auxiliary for asymmetric alkylations affording high yields and diastereoselectivities. The alkylation products were readily cleaved by simple alkaline hydrolysis to give a-alkylated carboxylic acids in good yield and in almost enatiomerically pure form.

关键词： Chiral auxiliaries Alkylation Asymmetric catalysis Camphor-based

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Energy Storage Mechanism of Vanadium Nitride via Intercalating Different Atomic Radius for Expanding Interplanar Spacing

引用

Energy & Environmental Materials 2022年第2期5卷 565-571页

作者： Ying Liu Lingyang Liu long Kang fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Material Science and EngineeringLanzhou University of TechnologyLanzhou 730050China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China

As a promising anode material in supercapacitors,vanadium nitride has been widely concerned due to its ultra-high theoretical specific ***,its routine test capacitance value is still far from the theoretical value and its energy storage mechanism is *** order to solve these two key problems,here we prepare interplanar spacing expanded vanadium nitride materials with different impurity atoms intercalation from two anionic precursors of vanadium-based metal organic frameworks with different functional *** obtained vanadium nitride reaches a higher specific capacitance;and further,through ex situ X-Ray diffraction and in situ Raman,the charge storage of vanadium nitride is contributed by two processes:the first benefit is from the K^(+) de/intercalation in the interplanar spacing,and the other one is derived from the redox reaction with OH−by adsorption on ***,both of the first principle calculation and extended experiments support this *** believe that such detailed research on the energy storage mechanism can provide a clear idea for the application of metal nitrides in supercapacitors and other energy storage devices.

关键词： electrode materials energy storage mechanism supercapacitors vanadium nitride V-MOFs

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

引用

Nano-Micro Letters 2025年第2期17卷 358-371页

作者： Jiaen Wang Wei Ming longfu Chen Tianliang Song Moxi Yele Hao Zhang long Yang Gegen Sarula Benliang Liang Luting Yan Guangsheng Wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Investigation on the temperature distribution and strength of flat steel ribbon wound cryogenic high-pressure vessel

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第2期8卷 210-215页

作者： cui Xiao-long CHEN Guang-ming Institute of Refrigeration and Cryogenics Zhejiang University Hangzhou 310027 China

By analyzing heat transfer on the wall of fiat steel ribbon wound vessel （FSRWV）, a numerical model of temperature distribution on the entire wall （including inner core wall, flat steel ribbons, outside cylinder of jacket and insulating layer） was established by the authors. With the model, the temperature distribution and the length change in the vessel walls and flat steel ribbons in low temperature are calculated and analyzed. The results show that the flat steel ribbon wound cryogenic high-pressure vessel is simpler in structure, safer and easier to manufacture than those of conventional ones.

关键词： Cryogenic high-pressure vessel Flat steel ribbon wound vessel (FSRWV) Temperature distribution Numerical simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhanced autophagic clearance of amyloid-βvia histone deacetylase 6-mediated V-ATPase assembly and lysosomal acidification protects against Alzheimer's disease in vitro and in vivo

引用

Neural Regeneration Research 2025年第9期20卷 2633-2644页

作者： Zhimin long Chuanhua Ge Yueyang Zhao Yuanjie Liu Qinghua Zeng Qing Tang Zhifang Dong Guiqiong He Institute of Neuroscience School of Basic Medical SciencesChongqing Medical UniversityChongqingChina Department of Anatomy Chongqing Medical UniversityChongqingChina Department of Physiology Chongqing Medical UniversityChongqingChina Pediatric Research Institute Children’s Hospital of Chongqing Medical UniversityChongqingChina Ministry of Education Key Laboratory of Child Development and Disorders Children’s Hospital of Chongqing Medical UniversityChongqingChina National Clinical Research Center for Child Health and Disorders Children’s Hospital of Chongqing Medical UniversityChongqingChina Chongqing Key Laboratory of Child Neurodevelopment and Cognitive Disorders Children’s Hospital of Chongqing Medical UniversityChongqingChina

Recent studies have suggested that abnormal acidification of lysosomes induces autophagic accumulation of amyloid-βin neurons,which is a key step in senile plaque ***,resto ring normal lysosomal function and rebalancing lysosomal acidification in neurons in the brain may be a new treatment strategy for Alzheimer's *** acetylation/deacetylation plays a central role in lysosomal ***,we show that inhibiting the classic microtubule deacetylase histone deacetylase 6 with an histone deacetylase 6 shRNA or thehistone deacetylase 6 inhibitor valproic acid promoted lysosomal reacidification by modulating V-ATPase assembly in Alzheimer's *** rthermore,we found that treatment with valproic acid markedly enhanced *** clearance of amyloid-βaggregates,and ameliorated cognitive deficits in a mouse model of Alzheimer's *** findings demonstrate a previously unknown neuroprotective mechanism in Alzheimer's disease,in which histone deacetylase 6 inhibition by valproic acid increases V-ATPase assembly and lysosomal acidification.

关键词： Alzheimer's disease amyloid-β APP/PS1 mice autophagy cognitive impairment histone deacetylase 6 lysosomal acidification microtubule acetylation valproic acid V-ATPase

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cut-off value of ulcerative colitis endoscopic index of severity(UCEIS)score for predicting the need for pouch construction in ulcerative colitis:results of a multicenter study with long-term follow-up

引用

Gastroenterology Report 2021年第5期9卷 435-442,I0002页

作者： Weimin Xu Weijun Ou Jihong Fu Yubei Gu long cui Jie Zhong Peng Du Department of Colorectal Surgery Xinhua HospitalShanghai Jiaotong University School of MedicineShanghaiP.R.China Department of Gastroenterology Rui Jin HospitalShanghai Jiao Tong University School of MedicineShanghaiP.R.China

Background Total proctocolectomy with ileal pouch–anal anastomosis(IPAA)was the first choice for the surgical treatment of the ulcerative colitis(UC)*** data on the predictive value of the ulcerative colitis endoscopic index of severity(UCEIS)for the need for IPAA in UC patients is *** aimed to establish the UCEIS cut-off value to further analyse whether the UCEIS cut-off was suitable for predicting the need for IPAA in UC *** The clinical data of UC patients from June 1986 to March 2020 at our institute were retrospectively *** UCEIS scores recorded at the time of the first colonoscopy after hospitalization were used in the *** operating characteristic curve analysis was performed to determine the UCEIS cut-off value for predicting the need for *** A total of 283 UC patients were included in the study,with a median UCEIS of *** a median follow-up of 13 years,80 patients(28.3%)received surgery invention,among whom 75(93.8%)underwent IPAA surgery and 5(6.2%)received subtotal colectomy with permanent ostomy.A UCEIS cut-off of 6 had the most significant area under the curve of 0.769 for predicting the need for IPAA(P<0.001),with a sensitivity of 72.0%and specificity of 81.8%.UCEIS≥6 was an independent predictive factor for the need for IPAA(P<0.001)and malignant transformation(P=0.010).Patients with UCEIS≥6 had a significantly shorter IPAA-free survival time than those with UCEIS<6(P<0.001).Conclusions UCEIS≥6 may be a threshold value for decision-making for IPAA and should be recommended for UC patients for reducing the incidence of malignant transformation.

关键词： ulcerative colitis endoscopic index of severity ileal pouch-anal anastomosis ulcerative colitis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：