|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Leaching ion adsorption rare earth by aluminum sulfate for increasing efficiency and lowering the environmental impact显示文摘The leaching efficiency(LE) of ion adsorption rare earth(IARE) by the sulfate and chloride of ammonium,magnesium and aluminum were comparatively determined using column leaching method. It is found that at equal equivalent concentration of cation, the LE of IARE by aluminum sulfate is the highest, and the zeta potential of clay mineral particles in the tailing is near to zero, which means a lower risk of landslide and pollutant emission. Furthermore, the optimum concentration of aluminum sulfate is determined to be0.02 mol/L, which is much lower than that of ammonium sulfate and magnesium sulfate. To reduce the production cost and environmental impact, we proposed a multi-stage leaching process, which was firstly leaching with ammonium sulfate and then with aluminum sulfate, following by water washing and lime neutralizing. With the ratio of ammonium sulfate to aluminum sulfate varying from 1:0 to 0.5:0.5, the residual ammonium in tailing decreases from 11.2% to 0.6%, however, the LE of RE shows an optimum value at 0.8:0.2. By neutralizing the pH of tailing with lime water to over 6, the ion concentration in water rinsing solution can meet the requirement for water discharge. At the same time, the zeta potential of clay particles is found to be around-5 mV, means a relatively lower risk of landslide. These facts indicate that the LE of IARE can be increased and the danger caused by tailings landslides and pollutant emissions can be reduced by replacing ammonium sulfate with aluminum sulfate as leaching reagent. | Lifen Yang Cuicui Li Dashan Wang Fengyang Li Yanzhu Liu Xuezhen Zhou Mingbiao Liu Xiufeng Wang Yongxiu Li | 2019 | Journal of Rare Earths2019，37，4： | 19 |
| 2 | Asymptotics for the Tail Probability of Random Sums with a Heavy-Tailed Random Number and Extended Negatively Dependent Summands显示文摘Let {X,X_k:k≥1} be a sequence of extended negatively dependent random variables with a common distribution F satisfying EX > 0.Let r be a nonnegative integer-valued random variable,independent of {X,X_k:k≥1}.In this paper,the authors obtain the necessary and sufficient conditions for the random sums S_r =(?)X_n to have a consistently varying tail when the random number t has a heavier tail than the summands,i.e.,(P(X>x))/(P(r >x))→0as | Fengyang CHENG Na LI | 2014 | Chinese Annals of Mathematics,Series B2014，35，1： | 3 |
| 3 | A method of predicting visual detectability of low-velocity impact damage in composite structures based on logistic regression model显示文摘This paper proposed a new method for quantitative assessment of visual detectability of damage based on logistic regression,using the Probability of Detection(POD)as a criterion.Experiments were performed to establish the massive hit/miss data of visual inspection.Authoritative investigations verified the reliability of the data.The prediction function concluded comprises more than one flaw size parameters,including the depth and diameter of the dents.The results show that the depth and diameter of the dents are pivotal for the evaluation of detectability;the type of detection,the detection distance,and the qualifications of personnel are critical external factors to be considered.This function,with an accuracy rate of nearly 85%,is capable of predicting the visual detection probability of impact damage under various detection environments,which will provide a reference for the damage tolerance design of composite materials and field maintenance in the NonDestructive Testing(NDT)field. | Fengyang JIANG Zhidong GUAN Zengshan LI Xiaodong WANG | 2021 | Chinese Journal of Aeronautics2021，34，1： | 2 |
| 4 | Cyclophosphamide abrogates the expansion of CD4^(+)Foxp3^(+) regulatory T cells and enhances the efficacy of bleomycin in the treatment of mouse B16-F10 melanomas显示文摘Objective:Promotion of the proliferative expansion of CD4^(+)Foxp3^(+)regulatory T cells(Tregs)is one of the side effects that limits the use of bleomycin(BLM)in the treatment of tumors.In this study,we examined the hypothesis that cyclophosphamide(CY),a chemotherapeutic agent with the capacity to eliminate tumor infiltrating Tregs,abrogated BLM-induced expansion of Tregs and consequently resulted in a better anti-tumor effect.Methods:The in vitro effects of BLM,with or without mafosfamide(MAF,the active metabolite of CY),on both TGF-β-induced differentiation of Tregs(iTregs),and TNF-induced expansion of naturally occurring Tregs(nTregs)were assessed.The in vivo effect of low doses of BLM and CY on tumor-infiltrating Tregs,as well as on the growth of mouse B16-F10 melanomas,was also studied.Results:In vitro treatment with BLM promoted the differentiation of iTregs,as well as TNF-induced expansion of nTregs.These effects of BLM were completely abrogated by MAF.Furthermore,in the mouse B16-F10 melanoma model,treatment with low doses of BLM increased the number of tumor-infiltrating Tregs,and this effect of BLM was also abrogated by CY.Importantly,combination therapy with low doses of BLM and CY showed synergistic anti-tumor effects.Conclusions:CY abrogated the effect of BLM on the expansion of Tregs.The combination of these 2 chemotherapeutic agents may represent a safer and more effective therapy in the treatment of cancer patients,and thus merits future clinical evaluation. | Ping Li Fengyang Chen Jingbin Zheng Yang Yang Yuan Li Yifei Wang Xin Chen | 2021 | Cancer Biology & Medicine2021，18，4： | 1 |
| 5 | Effective inhibition of mRNA accumulation and protein expression of H5N1 avian influenza virus NS1 gene in vitro by small interfering RNAs显示文摘 | Hanwei Jiao Li Du Yongchang Hao Ying Cheng Jing Luo Wenhua Kuang Donglin Zhang Ming Lei Xiaoxiao Jia Xiaoru Zhang Chao Qi Hongxuan He Fengyang Wang | 2013 | Folia Microbiologica2013，，4： | 1 |
| 6 | A hydroxyl radical detection system using gas expansion and fast gating laser-induced fluorescence techniques显示文摘An OH radical measurement instrument based on Fluorescence Assay by Gas Expansion(FAGE)has been developed in our laboratory.Ambient air is introduced into a low-pressure fluorescence cell through a pinhole aperture and irradiated by a dye laser at a high repetition rate of 8.5 k Hz.The OH radical is both excited and detected at 308 nm using A-X(0,0)band.To satisfy the high efficiency needs of fluorescence collection and detection,a 4-lens optical system and a self-designed gated photomultiplier(PMT)is used,and gating is actualized by switching the voltage applied on the PMT dynodes.A micro channel photomultiplier(MCP)is also prepared for fluorescence detection.Then the weak signal is accumulated by a photon counter in a specific timing.The OH radical excitation spectrum range in the wavelength of 307.82–308.2 nm is detected and the excited line for OH detection is determined to be Q_1(2)line.The calibration of the FAGE system is researched by using simultaneous photolysis of H_2O and O_2.The minimum detection limit of the instrument using gated PMT is determined to be 9.4×10~5molecules/cm^3,and the sensitivity is 9.5×10^(-7)cps/(OH·cm^(-3)),with a signal-to-noise ratio of 2 and an integration time of 60 sec,while OH detection limit and the detection sensitivity using MCP is calculated to be 1.6×10~5molecules/cm^3and 2.3×10^(-6)cps/(OH·cm^(-3)).The laboratory OH radical measurement is carried out and results show that the proposed system can be used for atmospheric OH radical measurement. | Hao Chen Renzhi Hu Pinhua Xie Xingbiao Xing Liuyi Ling Zhiyan Li Fengyang Wang Yihui Wang Jianguo Liu Wenqing Liu | 2018 | Journal of Environmental Sciences2018，30，3： | 1 |
| 7 | Increased expression of calcium‐sensing receptors induced by ox‐LDL amplifies apoptosis of cardiomyocytes during simulated ischaemia–reperfusion显示文摘 | JinGuo Hong‐ZhuLi Wei‐HuaZhang Lu‐ChuanWang Li‐NaWang LiZhang Guang‐WeiLi Hong‐XiaLi Bao‐FengYang LingyunWu RuiWang Chang‐QingXu | 2010 | Clinical and Experimental Pharmacology and Physiology2010，，3： | 1 |
| 8 | Increased expression of calcium‐sensing receptors induced by ox‐LDL amplifies apoptosis of cardiomyocytes during simulated ischaemia–reperfusion显示文摘 | JinGuo Hong‐ZhuLi Wei‐HuaZhang Lu‐ChuanWang Li‐NaWang LiZhang Guang‐WeiLi Hong‐XiaLi Bao‐FengYang LingyunWu RuiWang Chang‐QingXu | 2010 | Clinical and Experimental Pharmacology and Physiology2010，，3： | 1 |
| 9 | High-Frequency Sequence Stratigraphy and Fine-Scale Reservoir Characterization of the Devonian Sandstone, Donghe Formation, North Uplift of the Tarim Basin显示文摘The Devonian Donghe Sandstone complex in North Uplift of the Tarim Basin comprises of a series of diachronous sandy intervals deposited from the Late Devonian to Early Mississippian. They are constrained by a Late Devonian to Early Pennsylvanian 2 nd-order supersequence and can be subdivided into five 3 rd-order sequences, namely, S1, S2, S3, S4, and S5, from the oldest to youngest. Cores from four wells, 40 wireline logs, 410 thin sections, and porosity and permeability data from 639 spots from four wells were used to study the sediment provenance, build up the sequence-stratigraphic model of S5, and characterize the reservoirs at a feet scale. Detrital modes of sandstone from point counting indicate that Donghe Sandstone is directly sourced from recycled orogeny. The low content of feldspar and volcanic rock fragments suggests that Donghe Sandstone is recycled from sediment with a cratonic ultimate source. 1 D and 2 D chronostratigraphic correlation shows that at least 12 4 th-order highfrequency sequences(HFSs), from the oldest HFS1 to the youngest HFS12, can be recognized in S5. Each HFS is characterized by a general trend of shallowing-upward facies assemblage. Sequence boundaries were defined at where regionally correlatable deep-water facies overlaying shallow-water facies. There is a general shallowing-upward trend in the S5 3 rd-order sequence, characterized by a systematically increasing proportion of shallow-water facies(foreshore and upper shoreface), and a decreasing proportion of deep facies(offshore transition and lower shoreface). The shallowing-upward trend within both 3 rd-and 4 th-order sequences is resulted from a combined effect of eustatic sea-level change, tectonic activity, and sediment supply. The sequence-stratigraphic model of Donghe Sandstone S5 is similar to the rift-basin sequence-stratigraphic model. Sweet spots were defined as porosity >15% and permeability >100 md intervals, and their distribution and lateral continuity were investigated. HFS is one of the primary controls on the distribution of sweet spots distribution and can be used to guide hydrocarbon exploration. | WANG Ziyuan LIU Li PAN Mao SHI Yongmin XIONG Fengyang | 2018 | Acta Geologica Sinica(English Edition)2018，92，5： | 0 |
| 10 | Critical Controlling Factors of Shale Gas Enrichment and Accumulation,and Remaining Uncertainties显示文摘Shale gas exploration have yielded remarkable achievements recently in China,and four national demonstration areas for shale gas exploration and production have been established respectively as FulingJiaoshiba,Changning-Weiyuan,Zhaotong and Yanchang.During recent few years,nearly 400 wells have been drilled including 143 exploratory wells(vertical wells) | JIANG Zhenxue TANG Xianglu LI Zhuo JI Wenming YANG Wei YUAN Yuan WANG Pengfei XIONG Fengyang | 2015 | Acta Geologica Sinica(English Edition)2015，89，A01： | 0 |
| 11 | Main Factors Control the Shale Gas Accumulation in the Yudongnan Area,Southwest China显示文摘Shale gas exploration has made great progresses in ancient marine shales in southern china,especially in the Jiaoshiba-Fuling area.However,rare succeed exploration and production cases outside Sichuan basin were reported.The main reason for this issue can be attributed to the misunderstandings of the mechanisms of shale | LI Zhuo JIANG Zhenxue LIU Luofu GAO Xiaoyue JI Wenming XIONG Fengyang SONG Yan | 2015 | Acta Geologica Sinica(English Edition)2015，89，A01： | 0 |
| 12 | A new diatom genus Spargeria gen.nov.(Bacillariophyceae)from Xizang,China,and the description of two new species显示文摘During our investigation of diatom biodiversity in Xizang,two species exhibited unique morphological features discriminative from all previously known genera.Herein we describe these two species and describe as new the genus,Spargeria gen.nov.The new genus features narrow to wide rectangular valves,narrow valve mantles,filiform raphe branches that occur on the valve face only,terminal raphe fissures straight or slightly deflected to same side,bow-tie shaped central areas,chambered striae present on the valve face only,being absent from the mantle,wider striae near the axial area and very narrow near the margin,multiseriate striae with small and round areolae that are occluded externally.Comparatively,Spargeria zhuii sp.nov.has larger and robust valves,radiate striae,with one divergent stria near the apices,while Spargeria chenia sp.nov.is smaller,with narrow valves,striae slightly radiate in the middle,becoming convergent or parallel near apices.This new genus belongs to the family Pinnulariaceae,and it was compared and contrasted with other genera of this family.Our work suggests the need for continued studies to document the biodiversity of diatoms in Xizang. | Yan LIU John Patrick KOCIOLEK Li WANG Xinxin LU Huan ZHU Guoxiang LIU Fengyang SUI Yawen FAN | 2024 | Journal of Oceanology and Limnology2024，42，1： | 0 |
| 13 | CD97 inhibits osteoclast differentiation via Rap1a/ERK pathway under compression显示文摘Acceleration of tooth movement during orthodontic treatment is challenging, with osteoclast-mediated bone resorption on the compressive side being the rate-limiting step. Recent studies have demonstrated that mechanoreceptors on the surface of monocytes/macrophages, especially adhesion G protein-coupled receptors (aGPCRs), play important roles in force sensing.However, its role in the regulation of osteoclast differentiation remains unclear. Herein, through single-cell analysis, we revealed that CD97, a novel mechanosensitive aGPCR, was expressed in macrophages. Compression upregulated CD97 expression and inhibited osteoclast differentiation;while knockdown of CD97 partially rescued osteoclast differentiation. It suggests that CD97 may be an important mechanosensitive receptor during osteoclast differentiation. RNA sequencing analysis showed that the Rap1a/ERK signalling pathway mediates the effects of CD97 on osteoclast differentiation under compression. Consistently, we clarified that administration of the Rap1a inhibitor GGTI298 increased osteoclast activity, thereby accelerating tooth movement. In conclusion,our results indicate that CD97 suppresses osteoclast differentiation through the Rap1a/ERK signalling pathway under orthodontic compressive force. | Xuan Zhou Xinjia Cai Fengyang Jing Xuefen Li Jianyun Zhang Heyu Zhang Tiejun Li | 2024 | International Journal of Oral Science2024，16，1： | 0 |
| 14 | Reasons to seek orthodontic treatment affecting patients' satisfaction显示文摘Objective To assess patients' satisfaction level with orthodontic treatment and to identify it there was any association between patient's reason to seek orthodontic treatment and their satisfaction level with the treatment outcome.Methods This study was conducted among a sample of 80 patients.A questionnaire was formulated including Dental Impact on Daily Living questionnaire(to assess the effect of the treatment on daily living and satisfaction with the dentition).Descriptive statistics,Chi-square test were used to analyze the data.Results and Conclusion Patients' reason to seek orthodontic treatment had no significant association with patients' satisfaction with their dentition after orthodontic treatment.Patients with aesthetic need were found to experience more pain(P=0.034).There was statistical significant association between age and total satisfaction(P=0.035).Gender had no effect on patient's satisfaction. | Vongphachanh Xayasone XU Huiyong LI Yinghui SUN Fengyang LU Zhiyun TIAN Hua ZOU Yaguang TAN Xiaoting LI Tinghui WU Buling | 2017 | 分子影像学杂志2017，40，2： | 0 |
| 15 | A pair of transporters controls mitochondrial Zn^(2+) levels to maintain mitochondrial homeostasis显示文摘Zn^(2+)is required for the activity of many mitochondrial proteins,which regulate mitochondrial dynamics,apoptosis and mitophagy.However,it is not understood how the proper mitochondrial Zn^(2+)level is achieved to maintain mitochondrial homeostasis.Using Caenorhabditis elegans,we reveal here that a pair of mitochondrion-localized transporters controls the mitochondrial level of Zn^(2+).We demonstrate that SLC-30A9/ZnT9 is a mitochondrial Zn^(2+)exporter.Loss of SLC-30A9 leads to mitochondrial Zn^(2+)accumulation,which damages mitochondria,impairs animal development and shortens the life span.We further identify SLC-25A25/SCaMC-2 as an important regulator of mitochondrial Zn^(2+)import.Loss of SLC-25A25 suppresses the abnormal mitochondrial Zn^(2+)accumulation and defective mitochondrial structure and functions caused by loss of SLC-30A9.Moreover,we reveal that the endoplasmic reticulum contains the Zn^(2+)pool from which mitochondrial Zn^(2+)is imported.These findings establish the molecular basis for controlling the correct mitochondrial levels for normal mitochondrial structure and functions. | Tengfei Ma Liyuan Zhao Jie Zhang Ruofeng Tang Xin Wang Nan Liu Qian Zhang Fengyang Wang Meijiao Li Qian Shan Yang Yang Qiuyuan Yin Limei Yang Qiwen Gan Chonglin Yang | 2022 | Protein & Cell2022，13，3： | 0 |
| 16 | Local Precise Large and Moderate Deviations for Sums of Independent Random Variables显示文摘Let {X, X_k : k ≥ 1} be a sequence of independent and identically distributed random variables with a common distribution F. In this paper, the authors establish some results on the local precise large and moderate deviation probabilities for partial sums S_n =sum from i=1 to n(X_i) in a unified form in which X may be a random variable of an arbitrary type,which state that under some suitable conditions, for some constants T > 0, a and τ >1/2and for every fixed γ > 0, the relation P(S_n- na ∈(x, x + T ]) ~nF((x + a, x + a + T ]) holds uniformly for all x ≥γn~τ as n→∞, that is, P(Sn- na ∈(x, x + T ]) lim sup- 1 = 0.n→+∞x≥γnτnF((x + a, x + a + T ])The authors also discuss the case where X has an infinite mean. | Fengyang CHENG Minghua LI | 2016 | Chinese Annals of Mathematics,Series B2016，37，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员