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183篇 您的检索式:作者名="Hongbing Zhang"
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1Strontium and boron isotopic constraint on the marine origin of the Khammuane potash deposits in southeastern Laos显示文摘Since 2006,we have conducted a geological exploration of the Khammuane area in southeastern Laos.Several thick sequences of potash deposits containing sylvite and carnallite were discovered from drilling Paleocene strata of the Thangon Formation(E1tg).To constrain the origin of the brine that formed thick sequences of salt mineral deposits,we measured the strontium and boron isotope composition of some salt minerals in the potash deposit.Boron isotope composition of halite-and potash-associated minerals in the Khammuane potash deposit varied from 19.91%to 31.01‰,which differs significantly from continental evaporates(-6.83‰--5.79‰)but is very close to that of salts precipitated from evapo-concentrated seawater(10‰-36‰).The 87Sr/86Sr ratios(0.707542 to 0.709461)of salts were also close to the values of Paleocene seawater(0.70772 to 0.707830).The content of Br-(0.01%-0.25%)and Br×103/Cl ratios(0.10-0.52)of halite were>10 times higher than that of common continental salts.These characteristics indicate clearly that the Laos potash deposits were deposited from seawater.The small variation in boron and strontium isotopes in all salt sedimentary sequences(gypsum-halite-potash-halite)also suggests that the recharge source should be stable and the effects of other continental water mixing are negligible.Large-scale potash deposits are commonly precipitated from seawater.Hence,the results of recent regional drilling work and geochemical research suggest extensive potash resources could occur in the Thangon Formation of southeastern Laos.TAN HongBing MA HaiZhou LI BinKai ZHANG XiYing XIAO YingKai 2010Chinese Science Bulletin2010,55,27:37
2Improving water-use efficiency by decreasing stomatal conductance and transpiration rate to maintain higher ear photosynthetic rate in drought-resistant wheat显示文摘In wheat, the ear is one of the main photosynthetic contributors to grain filling under drought stress conditions. In order to determine the relationship between stomatal characteristics and plant drought resistance, photosynthetic and stomatal characteristics and water use efficiency(WUE) were studied in two wheat cultivars: the drought-resistant cultivar ‘Changhan 58' and the drought-sensitive cultivar ‘Xinong 9871'. Plants of both cultivars were grown in pot conditions under well-watered(WW) and water-stressed(WS) conditions. In both water regimes,‘Changhan 58' showed a significantly higher ear photosynthetic rate with a lower rate of variation and a significantly higher percentage variation of transpiration compared to control plants at the heading stage under WS conditions than did ‘Xinong 9871' plants. Moreover,‘Changhan 58' showed lower stomatal density(SD) and higher stomatal area per unit organ area(A) under both water conditions. Water stress decreased SD, A, and stomatal width(SW), and increased stomatal length in flag leaves(upper and lower surfaces) and ear organs(awn, glume,lemma, and palea), with the changes more pronounced in ear organs than in flag leaves.Instantaneous WUE increased slightly, while integral WUE improved significantly in both cultivars. Integral WUE was higher in ‘Changhan 58', and increased by a greater amount, than in‘Xinong 9871'. These results suggest that drought resistance in ‘Changhan 58' is regulated by stomatal characteristics through a decrease in transpiration rate in order to improve integral WUE and photosynthetic performance, and through sustaining a higher ear photosynthetic rate, therefore enhancing overall drought-resistance.Yuping Li Hongbing Li Yuanyuan Li Suiqi Zhang 2017The Crop Journal2017,5,3:18
3PM_(2.5)-bound polycyclic aromatic hydrocarbons(PAHs) in Beijing:Seasonal variations,sources,and risk assessment显示文摘Polycyclic aromatic hydrocarbons(PAHs) have been of health concern due to its carcinogenesis and mutagenesis. In this study, we aimed to assess the variations, sources, and lifetime excessive cancer risk(ECR) attributable to PAHs bound to ambient particulate matters with aerodynamic diameter less than 2.5 μm(PM_(2.5)) in metropolitan Beijing, China. We collected24-hour integrated PM_(2.5) samples on daily basis between November 2014 and June 2015 across both central heating(cold months) and non-heating(warm months) seasons, and further analyzed the PAH components in these daily PM_(2.5) samples. Our results showed that total concentrations of PM_(2.5)-bound PAHs varied between(88.6 ± 75.4) ng/m^3 in the cold months and(11.0 ± 5.9) ng/m^3 in the warm months. Benzo[a]pyrene(Ba P), the carcinogenic marker of PAHs,averaged at 5.7 and 0.4 ng/m^3 in the cold and warm months, respectively. Source apportionment analyses illustrated that gasoline, biomass burning, diesel, coal combustion and cooking were the major contributors, accounting for 12.9%, 17.8%, 24.7%, 24.3% and 6.4% of PM_(2.5)-bound PAHs, respectively. The BaP equivalent lifetime ECR from inhalation of PM_(2.5)-bound PAHs was 16.2 cases per million habitants. Our results suggested that ambient particulate reduction from energy reconstruction and adaption of clean fuels would result in reductions PM_(2.5)-bound PAHs and its associated cancer risks. However, as only particulate phased PAHs was analyzed in the present study, the concentration of ambient PAHs could be underestimated.Baihuan Feng Lijuan Li Hongbing Xu Tong Wang Rongshan Wu Jie Chen Yi Zhang Shuo Liu Steven Sai Hang Ho Junji Cao Wei Huang 2019Journal of Environmental Sciences2019,31,3:17
4Matrine reduces the proliferation and invasion of colorectal cancer cells via reducing the activity of p38 signaling pathway显示文摘Matrine 被使用了在反煽动性并且反癌症治疗很长时间。然而,在 colorectal 癌症(CRC ) 的反变形的效果和相关机制仍然是不清楚的。在这研究,我们调查了 matrine 的管理是否能经由调整表明小径的 p38 禁止人的 CRC 房间的增长,活动性,和侵略。结果证明 matrine 在 vitro 并且在 vivo 禁止了 CRC 房间的移植和侵略。在为 24 h 与 matrine 被对待以后,另外,表示在 CRC 房间矩阵 metalloproteinase-2 (MMP-2 ) 和 MMP-9 以及朊酶活动铺平以一种剂量依赖者方式被减少。而且, matrine 显然减少了 p38 的 phosphorylation 水平。有 p38 禁止者(SB203580 ) 和 matrine 的联合治疗在 CRC 房间导致了侵略以及 MMP-2/-9 表示的 synergistic 减小。matrine 在 vivo 禁止了 CRC 肿瘤的增长和转移,这也被发现。在结论, p38 发信号小径可以由减少 MMP-2/-9 的表示在 CRC 房间的移植和侵略上在 matrine 的禁止的效果包含,建议 matrine 可以是为 CRC 的一个潜在的治疗学的代理人。Hongtao Ren Shuqun Zhang Hongbing Ma Yali Wang Di Liu Xijing Wang Zhongwei Wang 2014Acta Biochimica et Biophysica Sinica2014,46,12:16
5Chinese Stroke Association guidelines for clinical management of cerebrovascular disorders: executive summary and 2019 update of clinical management of cerebral venous sinus thrombosis显示文摘Aim Cerebral venous sinus thrombosis(CVST)is a less common cerebrovascular disease that predominantly affects young patients.The incidence of CVST is 2-5/10000000/year,accounting for 0.5%-1%of all stroke.To reduce mortality and morbidity associated with CVST,Chinese Stroke Association commissioned the authors to write the current guideline on the management of CVST.Methods PubMed(MEDLINE),CNKI and Wanfang database were searched for studies related to CVST from 1 January 1990 to 31 July 2019.Data were synthesised by evidence tables.Each recommendation was fully discussed by the writing group members and reviewed by Chinese Stroke Association Stroke Fellow Committees.Levels of evidence grading algorithm of Chinese Stroke Association was used to grade each recommendation.results This guideline mainly focuses on the diagnostic evaluation,therapeutic strategies and secondary prevention of CVST.CT/CTV and MRI/MRV are recommended in the initial imaging evaluation of patients with suspected CVST.Anticoagulation therapy with low-molecular weight heparin should be initiated in patients with CVST immediately.After the acute stage,warfarin is recommended for 3-6 months to prevent the recurrence of CVST and other venous thromboembolic events.Conclusions The guideline summarises the current evidence regarding the management of CVST,and provides references for diagnosis,treatment and secondary prevention of CVST in China.Yuhua Fan Jian Yu Hongbing Chen Jian Zhang Jiangang Duan Dapeng Mo Wenhao Zhu Bo Wang Fubing Ouyang Yicong Chen Linfang Lan Jinsheng Zeng Chinese Stroke Association Stroke Council CVST Guideline Writing Committee 2020Stroke & Vascular Neurology2020,5,2:14
6Risk factors and long-term health consequences of macrosomia:a prospective study in Jiangsu Province,China显示文摘We sought to determine risk factors associated with fetal macrosomia and to explore the long-term consequence of infant macrosomia at the age of 7 years.A prospective population based cohort study was designed to examine the associations between maternal and perinatal characteristics and the risk of macrosomia.A nested case-control study was conducted to explore the long-term health consequence of infant macrosomia.The mean maternal age of the macrosomia group was 24.74±3.32 years,which is slightly older than that in the control group(24.35±3.14 years,P = 0.000).The mean maternal body mass index(BMI) at early pregnancy was 22.75±2.81 kg/m 2,which was also higher than that in the control group(21.76±2.59 kg/m 2,P = 0.000).About 64.6% of macrosomic neonates were males,compared with 51.0% in the control group(P = 0.000).Compared with women with normal weight(BMI:18.5-23.9 kg/m 2),women who were overweight(BMI:24-27.9 kg/m 2) or obese(BMI ≥ 28 kg/m 2),respectively,had a 1.69-fold(P = 0.000) and a 1.49-fold(P = 0.000) increased risks of having a neonate with macrosomia,while light weight(BMI<18.5 kg/m 2) women had an approximately 50% reduction of the risk.Furthermore,macrosomia infant had a 1.52-fold and 1.50-fold risk,respectively,of developing overweight or obesity at the age of 7 years(P = 0.001 and P = 0.000).Older maternal age,higher maternal BMI at early pregnancy and male gender were independent risk factors of macrosomia.Macrosomic infant was associated with an increased predisposition to develop overweight or obesity at the beginning of their childhood.Shouyong Gu Xiaofei An Liang Fang Xiaomin Zhang Chunyan Zhang Jingling Wang Qilan Liu Yanfang Zhang Yongyue Wei Zhibin Hu Feng Chen Hongbing Shen 2012The Journal of Biomedical Research2012,26,4:14
7Validation of an agricultural non-point source(AGNPS)pollution model for a catchment in the Jiulong River watershed,China显示文摘测试并且评估农业非点来源(AGNPS ) 的这研究为 Wuchuan 集水的模型,在 Jiulong 河分水岭的一个典型农业区域,福建省, China.The AGNPS 模型在十暴风雨上与观察数据为学习区域被校准并且验证。当二暴风雨上的数据被用于模型的确认时,在 2002 的八暴风雨上的数据被用于刻度。就在一个长期的系列上的水质数据的缺乏而言,一个新奇方法,把内部嵌套的集水与它的包围集水作比较,被用来补充不太长期的系列数据。AGNPS 模型的双刻度和确认被这比较获得。结果显示相关系数为流量是 0.99 和 0.98,分别地, 0.94 和 0.95 大集水和小集水为山峰流量评价并且 0.76 为小集水的沉积仅仅。每个相关系数为为二集水的一样的事件是同类的。与沉积收益和微粒磷的例外,山峰流量率和另外的营养素很好被预言。敏感分析证明土壤保持服务曲线数字和降雨数量是最敏感的参数,它导致了高产量 variations.Erosivity,另外的参数几乎没在水文学和优秀产量上有小影响。LIU Jianchang ZHANG Luoping ZHANG Yuzhen HONG Huasheng DENG Hongbing 2008Journal of Environmental Sciences2008,20,5:13
8Avian influenza A virus H5N1 causes autophagy-mediated cell death through suppression of mTOR signaling显示文摘穿过种类障碍感染人的很少鸟的流行性感冒病毒,高度病原的流行性感冒 A (H5N1 ) 紧张夺走生活多于感染的病人的一半。与由 H5N1 感染的肺损害的大部分未知的机制,尖锐呼吸悲痛症候群(ARDS ) 是在牺牲品之中的死亡的主要原因。这里我们在场 H5N1 通过 mTOR 的抑制引起了 autophagic 房间死亡的事实发信号。由 autophagy 基因 Beclin1 的弄空或由 autophagy 禁止者 3-methyladenine (3 麻省) , autophagy 的抑制显著地减少了 H5N1 调停的房间死亡。我们建议 autophagic 房间死亡可以在 H5N1 流行性感冒病人贡献 ARDS 的发展, autophagy 的抑制能因此为 H5N1 感染的治疗成为新奇策略。Jianhui Ma Qian Sun Ruifang Mi Hongbing Zhang 2011Journal of Genetics and Genomics2011,38,11:13
9mTOR/miR-145-regulated exosomal GOLM1 promotes hepatocellular carcinoma through augmented GSK-3b/MMPs显示文摘Golgi membrane protein 1(GOLM1/GP73)is a serum marker of hepatocellular carcinoma(HCC).We have previously shown that mTOR promoted tumorigenesis of HCC through stimulating GOLM1 expression.In this study,we demonstrated that the mammalian target of rapamycin(mTOR)was a negative regulator of microRNA-145(miR-145)expression.miR-145 inhibited GOLM1 expression by targeting a coding sequence of GOLM1 gene.GOLM1 and miR-145 were inversely correlated in human HCC tissues.GOLM1-enriched exosomes activated the glycogen synthase kinase-3β/matrix metalloproteinases(GSK-3β/MMPs)signaling axis of recipient cells and accelerated cell proliferation and migration.In contrast,miR-145 suppressed tumorigenesis and metastasis.We suggest that mTOR/miR-145/GOLM1 signaling pathway should be targeted for HCC treatment.Xiaochen Gai Bufu Tang Fangming Liu Yuting Wu Fang Wang Yanling Jing Fuqiang Huang Di Jin Ling Wang Hongbing Zhang 2019Journal of Genetics and Genomics2019,46,5:13
10Composition and flux of nutrients transport to the Changjiang Estuary显示文摘Based on the results of water sample measurements of nutrient concentrations at th e Datong Station of the Changjiang River from 1998 to 1999, combined w ith historical data of water quality, seasonal variations of nutrient concentrations and nutrient transports are discussed.The following results have been obtained: (1) the fluxes of the nitrate nitrogen, ammonium nitrogen and nitrite nitrogen increased by time-series from 1962 to 1990 , even if runoff volume had a little variation; (2) the concentrations and fluxes of the dissolved inorganic nitrogen (DIN) and dissolved in organic phosphorus (DIP) increased notably with time, but those of the dissolved silicon (DSI) decreased pronouncedly; and (3) the concentration s and fluxes changed synchronously with time between the Datong Station a nd the Changjiang Estuary.ZHANG Shen,JI Hongbing,YAN Weijin,DUAN Shuiwang(Inst. of Geographic Sciences and Natural Resources Research, Beijing 100101, China) 2003Journal of Geographical Sciences2003,13,1:13
11Pediatric reference intervals in China(PRINCE):design and rationale for a large,multicenter collaborative cross-sectional study显示文摘There is a lack of accurate pediatric reference intervals(RIs) in China, with most commonly used RIs established without consideration of the effect of age and gender. The Pediatric Reference Intervals in China(PRINCE) project aims to establish and verify pediatric RIs for 31 common laboratory measurands.The project will be a large, multicenter cross-sectional study:14,490 healthy children and adolescents aged up to 19 years will be surveyed by 10 children's hospitals and one pediatric department of a university hospital. To evaluate the feasibility and efficiency of the study methods, 602 children were surveyed in the pilot phase of the PRINCE study in April 2017: it found that some measurands were distinctly age dependent and that there were differences between values for males and females. The results of the pilot study affirmed the necessity of the PRINCE project for Chinese pediatrics. The pilot also indicated potential difficulties in the full survey, e.g., difficulties in recruiting children aged under 3 years and insufficient collection of blood samples from infants. The operation of the PRINCE project has been modified based on the findings in the pilot study toward improving the validity of the PRINCE project and promoting its openness and transparency.Xin Ni Wenqi Song Xiaoxia Peng Ying Shen Yaguang Peng Qiliang Li Yan Wang Lixin Hu Yanying Cai Hong Shang Min Zhao Hong Jiang Yaoguo Huang Runqing Mu Wenxiang Chen Mingting Peng Chuanbao Zhang Jie Zeng Chenbin Li Hongling Yang Yongmei Jiang Jin Xu Guixia Li Hongbing Chen Yun Xiang Sancheng Cao Zhenxin Guo Dapeng Chen 2018Science Bulletin2018,63,24:12
12Waste oyster shell as a kind of active filler to treat the combined wastewater at an estuary显示文摘Estuaries have been described as one of the most difcult environments on Earth. It is difcult to know how to treat the combined wastewater in tidal rivers at the estuary, where the situation is very diferent from ordinary fresh water rivers. Waste oyster shell was used as the active filler in this study in a bio-contact oxidation tank to treat the combined wastewater at the Fengtang Tidal River. With a middle-experimental scale of 360 m3/day, the average removal efciency of COD, BOD, NH3-N, TP and TSS was 80.05%, 85.02%,86.59%, 50.58% and 85.32%, respectively, in this bio-contact oxidation process. The living microbes in the biofilms on the waste oyster shell in this bio-contact oxidation tank, which were mainly composed of zoogloea, protozoa and micro-metazoa species, revealed that waste oyster shell as the filler was suitable material for combined wastewater degradation. This treatment method using waste oyster shell as active filler was then applied in a mangrove demonstration area for water quality improvement near the experiment area, with a treatment volume of 5 × 103m3/day. Another project was also successfully applied in a constructed wetland, with a wastewater treatment volume of 1 × 103m3/day. This technology is therefore feasible and can easily be applied on a larger scale.Hongbing Luo Gu Huang Xiaoying Fu Xiaoling Liu Daocai Zheng Jian Peng Ke Zhang Bo Huang Liangqian Fan Fenghui Chen Xiubo Sun 2013Journal of Environmental Sciences2013,25,10:11
13Typical Geochemical Elements in Loess Deposit in the Northeastern Tibetan Plateau and Its Paleoclimatic Implication显示文摘Widespread and thick loess deposit in the northeastern Tibetan Plateau records paleoclimatic changes over the Quaternary period. In this study, we investigate a loess section located in a high terrace of the Huangshui River in the Xining Basin, and collect samples at 20-cm intervals by digging a well of 16-m depth (including paleosol S1 and S0 and several loess interlayers over the last glacial-interglacial cycle and the Holocene). Concentration of some active elements (Sr and Ca) and inert elements (Rb, Zr, Ti) in these loess samples are measured. The results show that ratios of those elements (oxide), such as Rb/Sr, Ti/Sr, and Zr/CaO ratios, would indicate sensitively paleoclimatic changes, especially the history of precipitation over the last glacial-interglacial and the Holocene. Moreover, the curves of Rb/Sr, Ti/Sr, and Zr/CaO ratios had almost the same variable trends from the bottom to the top and also closely correlated with values of magnetic susceptibility and the global marine δ18O record. But compared with the curves of magnetic susceptibility, the changes of ratios of these elements (oxide) are clearer and easy to understand. Therefore, the ratios of these typical chemical elements in the loess deposit may be used as an excellent index to investigate the history of paleoclimate, particularly precipitation changes in the northeastern Tibetan Plateau.TAN Hongbing MA Haizhou ZHANG Xiying LU Huayu WANG Jianguo 2006Acta Geologica Sinica(English Edition)2006,80,1:10
14Deep structure at northern margin of Tarim Basin显示文摘In this paper, a 2D velocity structure of the crust and the upper mantle of the northern margin of the Tarim Basin (TB) has been obtained by ray tracing and theoretical seismogram calculation under the condition of 2D lateral inhomogeneous medium using the data of seismic wide angle reflection/refraction profile from Baicheng to Da Qaidam crossing the Kuqa Depression (KD) and Tabei Uplift (TU). And along the Baicheng to Da Qaidam profile, 4 of the 10 shot points are located in the northern margin of the TB. The results show that the character of the crust is uniform on the whole between the KD and TU, but the depth of the layers, thickness of the crust and the velocity obviously vary along the profile. Thereinto, the variation of the crust thickness mainly occurs in the middle and lower crust. The Moho has an uplifting trend near the Baicheng shot point in KD and Luntai shot point in TU, and the thickness of the crust reduces to 42 km and 47 km in these two areas, respectively. The transition zone between the KD and TU has a thickest crust, up to 52 km. In this transition zone, there are high velocity anoma-lies in the upper crust, and low velocity anomalies in the lower crust, these velocity anomalies zone is near vertical, and the sediment above them is thicker than the other areas. According to the velocity distributions, the profile can be divided into three sections:KD, TU and transition zone between them. Each section has a special velocity structural feature, the form of the crystalline basement and the relationship between the deep structure and the shallow one. The differences of velocity and tectonic between eastern and western profile in the northern margin of the Tarim Basin (NMTB) may suggest different speed and intensity of the subduction from the Tarim basin to the Tianshan orogenic belt (TOB).ZHAO JunMeng CHENG HongGang PEI ShunPing LIU HongBing ZHANG JianShi LIU BaoFeng 2008Chinese Science Bulletin2008,53,10:10
15A highly durable catalyst based on CoxMn3-xO4 nanosheets for low-temperature formaldehyde oxidation显示文摘为不稳定的有机化合物(VOC ) 的氧化的划算的催化剂对精力变换应用和环境保护批评。这个过程的主要瓶颈是能氧化的有效、稳定、划算的催化剂的发展在低温度的 HCHO。这里,一致地由锰钴氧化物 nanosheet 数组组成的先进材料在一件碳纺织品上盖住被与帖子退火相结合的一个简单阳极的电极淀积方法成功地制作处理,和罐头直接为 HCHO 作为高效的催化材料被使用消除。得益于增加的表面氧种类和改进氧化还原作用性质,同样准备的锰钴氧化物 nanosheets 为 HCHO 氧化显示出实质地更高的催化活动。催化剂完全在象 100  一样低的温度把 HCHO 变换成公司 2Yongchao Huang Kaihang Ye Haibo Li Wenjie Fan FengyiZhao Yuanming Zhang Hongbing Ji 2016Nano Research2016,9,12:10
16Epidemiological and etiological investigation of dengue fever in the Fujian province of China during 2004–2014显示文摘Dengue fever(DF) is a vector-borne disease and a tremendous socioeconomic burden on tropical and subtropical countries worldwide. To explore the characteristics of DF epidemic in the Fujian province, information of DF cases in Fujian during 2004–2014 was collected and analyzed. The complete E genes of 48 viral isolates were amplified and sequenced for phylogenetic analysis. A total of 733 cases was reported, of which 612(83.5%) occurred during the peak period from August to October. Additionally, 76%(190/250) of imported cases originated from Southeast Asia countries, by the epidemiological investigation. Phylogenetic analysis of the 48 viral isolates revealed that three genotypes(I, IV, V) of DENV1, and one genotype each of DENV2(cosmopolitan) and DENV3(I) circulated in Fujian during 2004–2014. Similar to the results of the epidemiological investigations, the source of most of the viral isolates, including imported and indigenous cases, may be Southeast Asia countries; however, importation from adjacent provinces was also observed in recent years. Overall, DF is considered an imported epidemic disease in Fujian. Increasing diversity of the viral source and geographic expansion of the area affected by DF in recent years highlights the necessity for strengthening surveillance of the DF epidemic and developing strategies for DF prevention and control in Fujian.Jinzhang Wang Hongbing Chen Meng Huang Yongjun Zhang Jianfeng Xie Yansheng Yan Kuicheng Zheng Yuwei Weng 2017Science China(Life Sciences)2017,60,1:9
17Multiple-target tracking with adaptive sampling intervals for phased-array radar显示文摘A novel adaptive sampling interval algorithm for multitarget tracking is presented.This algorithm which is based on interacting multiple models incorporates the grey relational grade(GRG) into the particle swarm optimization(PSO).Firstly,the desired tracking accuracy is set for each target.Secondly,sampling intervals are selected as particles,and then the advantage of the GRG is taken as the measurement function for resource management.Meanwhile,the fitness value of the PSO is used to measure the difference between desired tracking accuracy and estimated tracking accuracy.Finally,it is suggested that the radar should track the target whose prediction value of the next sampling interval is the smallest.Simulations show that the proposed method improves both the tracking accuracy and tracking efficiency of the phased-array radar.Zhenkai Zhang Jianjiang Zhou Fei Wang Weiqiang Liu Hongbing Yang 2011Journal of Systems Engineering and Electronics2011,22,5:9
18Abnormal Effective Connectivity in the Brain is Involved in Auditory Verbal Hallucinations in Schizophrenia显示文摘Information flow among auditory and language processing-related regions implicated in the pathophysiology of auditory verbal hallucinations(AVHs) in schizophrenia(SZ) remains unclear. In this study, we used stochastic dynamic causal modeling(s DCM) to quantify connections among the left dorsolateral prefrontal cortex(inner speech monitoring), auditory cortex(auditory processing), hippocampus(memory retrieval), thalamus(information filtering), and Broca's area(language production) in 17 first-episode drug-na?¨ve SZ patients with AVHs, 15 without AVHs, and 19 healthy controls using resting-state functional magnetic resonance imaging.Finally, we performed receiver operating characteristic(ROC) analysis and correlation analysis between image measures and symptoms. s DCM revealed an increasedsensitivity of auditory cortex to its thalamic afferents and a decrease in hippocampal sensitivity to auditory inputs in SZ patients with AVHs. The area under the ROC curve showed the diagnostic value of these two connections to distinguish SZ patients with AVHs from those without AVHs. Furthermore, we found a positive correlation between the strength of the connectivity from Broca's area to the auditory cortex and the severity of AVHs. These findings demonstrate, for the first time, augmented AVHspecific excitatory afferents from the thalamus to the auditory cortex in SZ patients, resulting in auditory perception without external auditory stimuli. Our results provide insights into the neural mechanisms underlying AVHs in SZ. This thalamic-auditory cortical-hippocampal dysconnectivity may also serve as a diagnostic biomarker of AVHs in SZ and a therapeutic target based on direct in vivo evidence.Baojuan Li Long-Biao Cui Yi-Bin Xi Karl J.Friston Fan Guo Hua-Ning Wang Lin-Chuan Zhang Yuan-Han Bai Qing-Rong Tan Hong Yin Hongbing Lu 2017Neuroscience Bulletin2017,33,3:8
19Dog sciatic nerve gap repaired by artificial tissue nerve graft显示文摘The feasibility of repairing dog sciatic nerve damage by using a biodegradable artificial tissue nerve graft enriched with neuroregenerating factors is investigated. The artificial nerve graft was implanted to a 30 mm gap of the sciatic nerve damage in 7 dogs. The dogs with the same nerve damage that were repaired by interposition of the autologous nerve or were given no treatment served as control group 1 or 2, respectively. The observations include gross and morphological observations, immune reaction, electrophysiological examination, fluorescence tracing of the neuron formation and the number of the neurons at the experimental sites, etc. Results showed that 6 months after the implantation of the graft, the regenerated nerve repaired the damage of the sciatic nerve without occurrence of rejection and obvious inflammatory reaction in all 7 dogs, and the function of the sciatic nerve recovered with the nerve conduction velocity of (23.91±11.35)m/s. The regenerated neurons and the forming of axon could be observed under an electron microscope. This proves that artificial tissue nerve graft transplantation can bridge the damaged nerve ends and promote the nerve regeneration.GU Xiaosong, ZHANG Peiyun, WANG Xiaodong, DING Fei, PENG Luping and CHENG Hongbing(Nantong Medical College, The Key Laboratory of Neuroregeneration of Jiangsu Province, Nantong 226001, China) 2003Progress in Natural Science:Materials International2003,13,8:6
20Physiological and Biochemical Mechanisms of Exogenous Calcium Chloride on Alleviating Salt Stress in Two Tartary Buckwheat(Fagopyrum tataricum)Varieties Differing in Salinity Tolerance显示文摘Salt stress is one of the most serious abiotic stresses limiting plant growth and development.Calcium as an essential nutrient element and important signaling molecule plays an important role in ameliorating the adverse effect of salinity on plants.This study aimed to investigate the impact of exogenous calcium on improving salt tolerance in Tartary buckwheat cultivars,cv.Xinong9920(salt-tolerant)and cv.Xinong9909(salt-sensitive).Four-week-old Tartary buckwheat seedlings under 100 mM NaCl stress were treated with and without exogenous calcium chloride(CaCl_(2)),Ca^(2+)chelator ethylene glycol tetraacetic acid(EGTA)and Ca^(2+)-channel blocker lanthanum chloride(LaCl_(3))for 10 days.Then,some important physiological and biochemical indexes were determined.The results showed that salt stress significantly reduced seedling growth,decreased photosynthetic pigments,inhibited antioxidants and antioxidant enzyme activities.However,it increased the reactive oxygen species(ROS)levels in the two Tartary buckwheat cultivars.Exogenous 10 mM CaCl_(2)application on salt-stressed Tartary buckwheat seedlings obviously mitigated the negative effects of NaCl stress and partially restored seedlings growth.Ca^(2+)-treated salt-stressed seedlings diplayed a suppressed accumulation of ROS,increased the contents of total chlorophyll,soluble protein,proline and antioxidants,and elevated the activities of antioxidant enzymes compared with salt stress alone.On the contrary,the addition of 0.5 mM LaCl_(3)and 5 mM EGTA on salt-stressed Tartary buckwheat seedlings exhibited the opposite effects to those with CaCl_(2)treatment.These results indicate that exogenous Ca^(2+)can enhance salt stress tolerance and Ca^(2+)supplementation may be an effective practice to cultivate Tartary buckwheat in saline soils.Tao Zhang Hongbing Yang 2022Phyton-International Journal of Experimental Botany2022,91,8:5
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