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772篇 您的检索式:作者名="Zhong Fan"
    题名 作者 年代 出处 被引量
1Significance of dredging on sediment denitrification in Meiliang Bay,China:A year long simulation study显示文摘An experiment for studying the effects of sediment dredging on denitrification in sediments was carried out through a one-year incubation of undredged (control) and dredged cores in laboratory. Dredging the upper 30 cm of sediment can significantly affect physico-chemical characteristics of sediments. Less degradation of organic matter in the dredged sediments was found during the experiment. Denitrification rates in the sediments were estimated by the acetylene blockage technique, and ranged from 21.6 to 102.7 nmol N2/(g dry weight (dw)·hr) for the undredged sediment and from 6.9 to 26.9 nmol N2/(g dw·hr) for dredged sediments. The denitrification rates in the undredged sediments were markedly higher (p<0.05) than those in the dredged sediments throughout the incubation, with the exception of February 2006. The importance of various environmental factors on denitrification was assessed, which indicated that denitrification was regulated by temperature. Nitrate was probably the key factor limiting denitrification in both undredged and dredged sediments. Organic carbon played some role in determining the denitrification rates in the dredged sediments, but not in the undredged sediments. Sediment dredging influenced the mineralization of organic matter and denitrification in the sediment; and therefore changed the pattern of inherent cycling of nitrogen.Jicheng Zhong Chengxin Fan Lu Zhang Edward Hall Shiming Ding Bao Li Guofeng Liu 2010Journal of Environmental Sciences2010,22,1:40
2Achieving over 16% efficiency for single-junction organic solar cells显示文摘To achieve high photovoltaic performance of bulk hetero-junction organic solar cells(OSCs), a range of critical factors including absorption profiles, energy level alignment, charge carrier mobility and miscibility of donor and acceptor materials should be carefully considered. For electron-donating materials, the deep highest occupied molecular orbital(HOMO) energy level that is beneficial for high open-circuit voltage is much appreciated. However, a new issue in charge transfer emerges when matching such a donor with an acceptor that has a shallower HOMO energy level. More to this point, the chemical strategies used to enhance the absorption coefficient of acceptors may lead to increased molecular crystallinity, and thus result in less controllable phase-separation of photoactive layer. Therefore, to realize balanced photovoltaic parameters, the donor-acceptor combinations should simultaneously address the absorption spectra, energy levels, and film morphologies. Here, we selected two non-fullerene acceptors, namely BTPT-4F and BTPTT-4F, to match with a wide-bandgap polymer donor P2F-EHp consisting of an imidefunctionalized benzotriazole moiety, as these materials presented complementary absorption and well-matched energy levels. By delicately optimizing the blend film morphology, we demonstrated an unprecedented power conversion efficiency of over 16% for the device based on P2F-EHp:BTPTT-4F, suggesting the great promise of materials matching toward high-performance OSCs.Baobing Fan Difei Zhang Meijing Li Wenkai Zhong Zhaomiyi Zeng Lei Ying Fei Huang Yong Cao 2019Science China Chemistry2019,62,6:38
3Seasonal variation of potential denitrification rates of surface sediment from Meiliang Bay, Taihu Lake, China显示文摘The regulatory effects of environmental factors on denitrification were studied in the sediments of Meiliang Bay, Taihu Lake, in a monthly sampling campaign over a one-year period. Denitrification rates were measured in slurries of field samples and enrichment experiments using the acetylene inhibition technique. Sediment denitrification rates in inner bay and outer bay ranged from 2.8 to 51.5 nmol N2/(g dw (dry weight)·hr) and from 1.5 to 81.1 nmol N2/(g dw·hr), respectively. Sediment denitrification rates were greatest in the spring and lowest in the summer and early autumn, due primarily to seasonal differences in nitrate concentration and water temperature. For each site, positive and linear relationships were regularly observed between denitrification rate and water columnn itrate concentration. Of various environmental factors on denitrification that we assessed, nitrate was determined to be the key factor limiting denitrification rates in the sediments of Meiliang Bay. In addition, at the two sites denitrification rates were also regulated by temperature. The addition of organic substrates had no significant effect on denitrification rate, indicating that sediment denitrification was not limited by organic carbon availability in the sediments. Nitrate in the water column was depleted during summer and early autumn, and this suppressed effective removal of nitrogen from Taihu Lake by denitrification.Jicheng Zhong, Chengxin Fan, Guofeng Liu, Lei Zhang, Jingge Shang, Xiaozhi GuState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. 2010Journal of Environmental Sciences2010,22,7:29
4Influence of Sediment Dredging on Chemical Forms and Release of Phosphorus显示文摘A laboratory experiment was carried out through a six-month incubation of undredged (control) and dredged cores to study the effect of sediment dredging on phosphorus (P) release from the sediment in the Taihu Lake.During the experiment,dredging the upper 30 cm layer could efficiently reduce the interstitial PO_4^(3-)-P concentration and different P forms in the sediment.The P fluxes of the undredged and dredged cores ranged from-5.1 to 3047.6 and-60.7 to 14.4μg m^(-2) d^(-1),respectively.The fluxes of the dredged cores were generally lower than those of the control.Differences in the fluxes between the dredged and undredged cores were statistically significant (P<0.05) from March to June 2006. The sediment P in the dredged cores had a lower release potential than that in the control.Dredging can be considered as a useful measure for rehabilitating the aquatic ecosystem after the external P loading in the Taihu Lake catchment was efficiently reduced.ZHONG Ji-Cheng YOU Ben-Sheng FAN Cheng-Xin LI Bao ZHANG Lu DING Shi-Ming 2008Pedosphere2008,18,1:27
5Incidence and prevention of venous thromboembolism in acutely ill hospitalized elderly Chinese显示文摘是的背景第三很经常的心血管的疾病,静脉的 thromboembolism (VTE ) 在就医的病人仍然是病态和死亡的一个主要原因。这研究的目的是在尖锐地有病的就医的老中国 patients.Methods A 为它的预防决定 VTE 和步的发生未来的多中心学习从 2006 年 6 月被进行到 2007 年 11 月。40 研究在中国集中的 607 patientsfrom 的一个总数被注册。病人的基线特征, VTE 事件和预防 / 治疗方法的数据是 59 个病人(9.7%) 有的 collected.Results 客观地证实的 VTE 在 90 天的后续期间,它, 59.3%occurred 在第一个星期期间并且 75% 在 14 天以内。41 个病人死了(6.6%) 在后续期间, 36.6% 在三个星期以内死了。我们也包括呼吸失败(16.4%) 发现那医药混乱,尖锐大脑梗塞(15.6%) ,急性传染疾病(14.3%) ,尖锐冠的动脉症候群(8.7%) 和心失败(7.6%) 在挑起 VTE 起一个作用。仅仅,有 VTE 的高风险的13.0%老病人使用了低剂量 unfractionated 肝磷脂,7.1%使用的低分子的重量肝磷脂,5.4%使用了 warfarin ,他们的0.3%使用的毕业压缩袜子和没有使用了我们的学习显示出的断断续续的灵魂 compression.Conclusions 在我们在 VTE 发生的学习和西方的国家之间的类似的结果在白天 90 在有急性医药病的老就医的病人。大小心必须由尖锐地有病的老就医的病人照料被使用处理 VTE 的复杂并发症。对栓塞的安全、有效的 prophylaxes 的申请仍然是批评挑战。LI Xiao-ying FAN Jin CHENG You-qin WANG Yan YAO Chen ZHONG Nan-shan 2011Chinese Medical Journal2011,,3:27
6Effects of hydrodynamics processes on phosphorus fluxes from sediment in large,shallow Taihu Lake显示文摘在湖沉积,超营养作用的一个主要原因和水质的随后的恶化的磷(P) 的周转,需要深理解。在这研究, P 版本上的暂停的效果与 Y 形状仪器在圆柱的缩影被学习。结果显示在越过沉积水接口(Fss ) 和风速度的推迟的物质的流动之间有一道正相关,并且增加的 FSS 在各个期间弯屈由一个稳定的状态跟随的过程。在轻、中等、大的风条件下面的最大的 FSS 是 299.9 ± 4 1.1, 573.4 ± 6 1.7,和 2093.8 ± 2 15.7 g/m2 分别地。然而,越过沉积水接口(FP ) 的 P 的流动没作为反应弯屈紧张的 Fss 跟随一个类似的模式,它增加了并且到达最大值在起始为光的 120 min 弯屈,然后逐渐地减少了,与 9.4 ± 1 .9 mg/m2 的最大的流动。在开始的 30 min 的 FP 的快速的增加在中等的风下面被观察,与 11.2 ± 0 .6 mg/m2 的最大的流动。令人惊讶地,大风与 3.5 ± 0 .9 mg/m2 的最大的流动比在轻、中等的风条件下面引起了更少的 FP。在水列的 Fss 在风以后在沉积过程期间显然衰退了,但是 FP 与风政体变化了。没有明显的差别在 8 h 沉积过程以后在 FP 上被检测,与起始的值相比,它意味着小冗余的 P 在风以后在水列离开了。YOU Ben-sheng ZHONG Ji-cheng FAN Cheng-xin WANG Tong-cheng ZHANG Lu DING Shi-ming 2007Journal of Environmental Sciences2007,19,9:23
7Spatiotemporal dynamics of aboveground primary productivity along a precipitation gradient in Chinese temperate grassland显示文摘Investigating the spatial and temporal variance in productivity along natural precipitation gradients is one of the most efficient approaches to improve understanding of how ecosystems respond to climate change. In this paper, by using the natural precipitation gradient of the Inner Mongolian Plateau from east to west determined by relatively long-term observations, we analyzed the temporal and spatial dynamics of aboveground net primary productivity (ANPP) of the temperate grasslands covering this region. Across this grassland transect, ANPP increased exponentially with the increase of mean annual precipitation (MAP) (ANPP=24.47e0.005MAP, R2=0.48). Values for the three vegetation types desert steppe, typical steppe, and meadow steppe were: 60.86 gm-2a-1, 167.14 gm-2a-1 and 288.73 gm-2a-1 respectively. By contrast, temperature had negative effects on ANPP. The moisture index (K ), which takes into ac- count both precipitation and temperature could explain the spatial variance of ANPP better than MAP alone (ANPP=2020.34K1.24, R2=0.57). Temporally, we found that the inter-annual variation in ANPP (cal- culated as the coefficient of variation, CV) got greater with the increase of aridity. However, this trend was not correlated with the inter-annual variation of precipitation. For all of the three vegetation types, ANPP had greater inter-annual variation than annual precipitation (PPT). Their difference (ANPP CV/PPT CV) was greatest in desert steppe and least in meadow steppe. Our results suggest that in more arid regions, grasslands not only have lower productivity, but also higher inter-annual variation of production. Climate change may have significant effects on the productivity through changes in precipitation pattern, vegetation growth potential, and species diversity.HU ZhongMin FAN JiangWen ZHONG HuaPing YU GuiRui 2007Science China Earth Sciences2007,50,5:23
8Preliminary characterization of acute aortic dissection in the mainland of China显示文摘经济地在更少和更多之中在尖锐大动脉的解剖( AAD )的特征探索差别的目的从尖锐大动脉的解剖( IRAD )的国际注册表与各种各样的文化和赛跑数据来源报告开发了国家,中国( MC )的大陆由寻找 PubMed 数据库是镇定的并且从2000年1月的中国杂志全文的数据库到2009年3月 .Study 选择从包含大量案例和 comple 的 IRAD 和 MC 的那些报告并且从包含病人们在 MC 由一样的医学中心报导了的最大的数字的文章的数据从 MC 被拿进 statistics.Results AAD 病人是比 IRAD 国家和在中国组的男病人的百分比显著地年轻的比 IRAD 国家高(80.7%对68.6%, P 0.001 )。在 MC 的病人多半是更少除了任何焦点的神经病学的赤字与典型症状和符号介绍。与 IRAD 组,不同中国病人是容易的经历磁性的回声成像(MRI ) 做 AAD 的诊断(45.5%vs.11.6% , P 0.001 ) 。在里面医院死亡在 2 个组之间是类似的,但是在 MC 的 AAD 病人的仅仅更小的比例经历了外科或在 MC 的病人被给看的 AAD 和在在 MC 和 IRAD 之间的一些临床的变量的差别的一般特征组织的 medicaltreatment.Conclusions 仍然存在。WANG Dong-jin FAN Fu-dong WANG Qiang LI Qing-guo ZHOU Qing WU Zhong SHI Guang-fei 2011Chinese Medical Journal2011,,11:23
9Generation of haploid embryonic stem cells from Macaca fascicularis monkey parthenotes显示文摘在从经由单性生殖和男性单性生殖的老鼠的胚胎的干细胞(haESCs ) 启用了在修改基因的动物的哺乳动物的房间和代的基因屏蔽的 haploid 的推导的最近的成功。然而, haESCs 是否能从首领被导出,仍然保持未知。这里,我们从 Macaca fascicularis 猴子的单性生殖的胚囊报导 haESCs 的推导。这些房间,作为 PG-haESCs 称为,是 pluripotent 并且能在 vitro 或在 vivo 区分到三胚胎的细菌层的房间。有趣地,一根猴子 PG-haESC 线(MPH1 ) 的 haploidy 与另一个(MPH2 ) 的相比是更稳定的,作为没有排序的激活荧光的房间(FACS ) ,由 haploid 房间的存在出现超过 140 天 haploid 房间的丰富。重要地,转基因的猴子 PG-haESC 线能被 lentivirus- 和 piggyBac 产生调停 transposon 的基因转移。而且,基因屏蔽在猴子 PG-haESCs 是可行的。我们的结果证明 PG-haESCs 能从猴子被产生,提供为在首领的基因分析的一个理想的工具。Hui Yang Zhen Liu Yu Ma Cuiqing Zhong Qi Yin Chikai Zhou Linyu Shi Yijun Cai Hanzhi Zhao Hui Wang Fan Tang Yan Wang Chenchen Zhang Xin-yuan Liu Dongmei Lai Ying Jin Qiang Sun Jinsong Li 2013Cell Research2013,23,10:22
10Effect of L-NAME on nitric oxide and gastrointestinal motility alterations in cirrhotic rats显示文摘AIM: To invsstigare the effect of L-NAME on nitric oxide andgastriubtestubal motility alterations in cirrhotic ratsMETHODS: Rats with cirrhosis induced by carbontetrachloride were randomly divided into two groups, one( n= 13) receiving 0. 5 mg@ kg-1 per clay of NG-nitro-L-argininemethyl ester (L-NAME), a nitric oxide synthase inhibitor,for 10 days, whereas the other group ( n = 13) and control( n = 10) rats were administrated the same volume of 9 g@ L-1saline.Half gastric emptying time and 2 h residual rate weremeasured by SPECT, using 99m Tc-DTPA-labeled bariumsuifate as test meal. Gastrointestinal transition time wasrecorded simultaneously. Serum concentration of nitrcoxide (NO) was determined by the kinetic cadmiunreduction and colorimetric methods. ImmunohistochemicalSABC method was used to observe the expression anddistribution of three types of nitric oxide synthase (NOS)isoforms in the mt gastrointestinal tract. Western blot wasused to detect expression of gastrointestinal NOS isoforms.RESULTS: Half gastric emptying time and trans-gastrointestinal time were significantly prolonged( 124.0 ± 26.4min; 33.7± 8.9min;72.1 ± 15.3 min; P<0.01), (12.4±0.5h; 9.5±0.3 h; 8.2±0.8 h; P<0.01), 2h residual rate wasraised in cirrhotic rots than in controls and cirrhotic ratstreated with L-NAME(54.9± 7.6 % ,13.7 ± 3.2 %, 34.9± 10.3%, P< 0.01). Serum concentration of NO was significantlyincreased in cirrhotic rots than in the other groups (8.20 ± 2.48)μmol@L-1, (5.94± 1.07) μmol@L-1 ,and control (5.66± 1.60) tμmol@L-1, P< 0.01. NOS staining intensities which weremainly located in the gastrointestinal tissues were markedlylower in cirrhotic rats than in the controls and cirrhotic ratsafter treated with L- NAME.CONCLUSION: Gastrointestinal motility was remarkablyinhibited in cirrhotic rats, which could he alleviated by L-NAME. Nitric oxide may play an important role in theinhibition of gastrointestinal motility in cirrhotic rats.Xin Wang Zong-You Zhang Mei Lan Ji-Yan Miao Xue-Gang Guo Yong-Quan Shi Yan-Qiu Zhao Jie Ding Kai-Cun Wu Dai-Ming Fan,Institute of Digestive disease,Xijing Hospital,Fourth Military Medical University,Xi’an 710032,Shaanxi Province,China Yue-Xia Zhong,Emergency Department,Tangdu Hospital,Fourth Military Medical University,Xi’an 710038,Shaanxi Province,China Ju Lu,Class EE 87,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China Bo-Rong Pan,Oncology Center,Xijing Hospital,Fourth Military Medical University,Xi’an 710032,Shaanxi Province,China 2002World Journal of Gastroenterology2002,8,2:19
11Thermal cracking of aviation kerosene for scramjet applications显示文摘Thermal cracking of China No.3 aviation kerosene was studied experimentally and analytically under supercritical conditions relevant to regenerative cooling system for Mach-6 scramjet applications. A two-stage heated tube system with cracked products collection/analysis was used and it can achieve a fuel temperature range of 700―1100 K,a pressure range of 3.5―4.5 MPa and a residence time of ap-proximately 0.5―1.3 s. Compositions of the cracked gaseous products and mass flow rate of the kerosene flow at varied temperatures and pressures were obtained experimentally. A one-step lumped model was developed with the cracked mixtures grouped into three categories:unreacted kerosene,gaseous products and residuals including liquid products and carbon deposits. Based on the model,fuel conversion on the mass basis,the reaction rate and the residence time were estimated as functions of temperature. Meanwhile,a sonic nozzle was used for the control of the mass flow rate of the cracked kerosene,and correlation of the mass flow rate gives a good agreement with the measurements.ZHONG FengQuan FAN XueJun YU Gong LI JianGuo 2009Science China(Technological Sciences)2009,52,9:18
12Single-cell transcriptomic analysis defines the interplay between tumor cells,viral infection,and the microenvironment in nasopharyngeal carcinoma显示文摘Nasopharyngeal carcinoma(NPC)is an Epstein-Barr virus(EBV)-associated malignancy with a complex tumor ecosystem.How the interplay between tumor cells,EBV,and the microenvironment contributes to NPC progression and immune evasion remains unclear.Here we performed single-cell RNA sequencing on^104,000 cells from 19 EBV^+NPCs and 7 nonmalignant nasopharyngeal biopsies,simultaneously profiling the transcriptomes of malignant cells,EBV,stromal and immune cells.Overall,we identified global upregulation of interferon responses in the multicellular ecosystem of NPC.Notably,an epithelial–immune dual feature of malignant cells was discovered and associated with poor prognosis.Functional experiments revealed that tumor cells with this dual feature exhibited a higher capacity for tumorigenesis.Further characterization of the cellular components of the tumor microenvironment(TME)and their interactions with tumor cells revealed that the dual feature of tumor cells was positively correlated with the expression of co-inhibitory receptors on CD8^+tumor-infiltrating T cells.In addition,tumor cells with the dual feature were found to repress IFN-γproduction by T cells,demonstrating their capacity for immune suppression.Our results provide new insights into the multicellular ecosystem of NPC and offer important clinical implications.Shanzhao Jin Ruoyan Li Ming-Yuan Chen Chao Yu Lin-Quan Tang Yan-Min Liu Jiang-Ping Li Yi-Na Liu Yi-Ling Luo Yifan Zhao Yu Zhang Tian-Liang Xia Shang-Xin Liu Qi Liu Guan-Nan Wang Rui You Jing-Yun Peng Jiang Li Feng Han Jianwei Wang Qiu-Yan Chen Li Zhang Hai-Qiang Mai Benjamin E.Gewurz Bo Zhao Lawrence S.Young Qian Zhong Fan Bai Mu-Sheng Zeng 2020Cell Research2020,30,11:16
13Preparation and self-assembly of amphiphilic polymer with aggregation-induced emission characteristics显示文摘An amphiphilic polymer bearing tetraphenylethene (TPE) moiety was synthesized by convenient reactions. The polymer exhibits unique aggregation-induced emission (AIE) characteristics and can self-assemble to size-tunable particles in DMF/water mixtures. The polymer nanoparticles can be used for cell imaging, which provides a potential stable fluorescent tool to monitor the distribution of drugs and bioconjugates in living cells.QIN AnJun ZHANG Ya HAN Ning MEI Ju SUN JingZhi FAN WeiMin TANG Ben Zhong 2012Science China Chemistry2012,55,5:16
14A prospective study comparing endoscopic subcutaneous mastectomy plus immediate reconstruction with implants and breast conserving surgery for breast cancer显示文摘保存外科(英国计算机学会) 的背景胸是为早乳癌的治疗的标准外科的过程。加立即的重建与的内视镜的下的乳房切除术(ESM ) 植入是一个新兴的过程。这未来的研究的目的是评估这的临床的结果在我们到 2007 年 10 月的从 2004 年 3 月的临床的 setting.Methods 的二个外科的过程,有乳癌的 43 个病人加腋的淋巴节点解剖和立即的重建经历了 ESM 与植入,当 54 个病人经历了英国计算机学会时。临床、病理学的特征,外科的安全,和治疗学的效果在二个组之间被比较。在那里的结果不是在年龄,临床的阶段,肿瘤的组织病理学说的类型,起作用的血损失,手术后的排水时间,和在二个组之间的手术后的复杂并发症的重要差别( P > 0.05 )手术后的复杂并发症是的 .The 在 ESM 病人的乳头和表面的皮肤拍动的部分坏死,并且在在 BCS 病人的腋下和剩余洞的水肿。处于在 ESM 之间的令人满意的手术后的化妆结果的率没有重要差别(88.4% , 38/43 ) 并且英国计算机学会(92.6% , 50/54 ) 病人(P > 0.05 ) 。在到 4 年的 6 个月的后续期间,与 ESM 对待的所有病人是没有疾病的,但是经历了英国计算机学会的 3 个病人把这些病人的转移或复发一个在为使用,高外科的安全,和有利化妆结果考虑宽指示以后多重机关 metastasis.Conclusions 死了,我们结束那 ESM 正腋的淋巴节点解剖和立即的重建与植入--为胸癌症保证的选择的新外科严肃的考虑作为FAN Lin-jun JIANG Jun YANG Xin-hua ZHANG Yi LI Xing-gang CHEN Xian-chun ZHONG Ling 2009Chinese Medical Journal2009,,24:14
15Integration of micro-supercapacitors with triboelectric nanogenerators for a flexible self-charging power unit显示文摘便携式、便携的电子设备的快速的发展为灵活、有效的精力收获和存储单位增加了需求。通常,这些作为分离部件独立被造并且使用。此处,我们建议雕刻的简单、划算的激光为制作一个灵活自我控告的 micro-supercapacitor 力量单位(SCMPU ) 的技术,由集成摩擦电, nanogenerator (TENG ) 和 micro-supercapacitor (MSC ) 穿进一台单个设备。SCMPU 能被周围的机械运动直接控告。我们表明 SCMPU 的能力连续地驱动轻射出的二极管和商业温湿计。这调查可以支持持续自我动力的系统的开发并且为 supercapacitors 提供一个有希望的新研究应用程序。Jianjun Luo Feng Ru Fan Tao Jiang Zhiwei Wang Wei Tang Cuiping Zhang Mengmeng Liu Guozhong Cao Zhong Lin Wang 2015Nano Research2015,8,12:14
16A Simple and Reliable Assay for Detecting Specifi c Nucleotide Sequences in Plants Using Optical Thin-fi lm Biosensor Chips显示文摘Here we report the adaptation and optimization of an effi cient, accurate and inexpensive assay that employs custom-designed silicon-based optical thin-fi lm biosensor chips to detect unique transgenes in genetically modi-S. Bai X. Zhong L. Ma W. Zheng L. Fan N. Wei X.W. Deng 2007分子植物育种2007,5,2:13
17Geochemistry of Iron,Sulfur and Related Heavy Metals in Metal-Polluted Taihu Lake Sediments显示文摘To understand the geochemical characteristics of iron and sulfur and the extent of iron-sulfide minerals in-uencing heavy metal behaviour in metal-polluted sediments of Taihu Lake,two sites,in Meiliang Bay(ML) and Wuli Lake(WL) ,were selected to study the fractionation of iron,sulfur and related heavy metals. There were relatively high concentrations of Fe2+ and low concentrations of total S2-in porewaters,indicating that conditions in these sediments favored iron reduction. The concentrations of acid volatile sulfides in sediments were 1.9-9.6 μmol g-1 at ML and 1.0-11.7 μmol g-1 at WL,both in the range of values detected in unpolluted lakes. Pyrite-S was 10.2-49.4 μmol g-1 at ML and 10.3- 33.0 μmol g-1 at WL,accounting for more than 69% of the reduced inorganic sulfur at both sites. The low degree of sulphidization(< 14%) and pyritization(< 10%) indicate that sulfate may be the limiting factor for pyrite formation. The extractability of Mn,Cu,Pb,Zn,Ni,and Cr in sediments all suggest that sulfides are not the major binding phase for these metals during early diagenesis. Sulfur may play a modest role in the geochemistry of iron and traced metals in the sediments.YIN Hong-Bin FAN Cheng-Xin DING Shi-Ming ZHANG Lu ZHONG Ji-Cheng 2008Pedosphere2008,18,5:13
18Relationships between altitudinal gradient and plant carbon isotope composition of grassland communities on the Qinghai-Tibet Plateau,China显示文摘Foliar and root carbon isotope composition(δ13C) of grassland communities on the Qinghai-Tibet Plateau,China,was obtained by the biomass weighting method and direct measurement.We investigated the characteristics and altitudinal patterns of foliar and root δ13C and determined which environmental factors influenced foliar δ13 C most.Foliar δ13 C of alpine steppe was significantly higher than that of alpine meadow and temperate steppe.For alpine meadow,root δ13C was significantly higher than of foliar δ13C.Foliar δ13C increased with altitude at an average rate of 0.60‰ km 1 for the whole grassland ecosystem.This rate was lower than that at species level.However,there were no significant relationships between root δ13C and altitude.Atmospheric pressure was a more important factor than temperature and precipitation in its influence on the altitudinal pattern of foliar δ13C at the community level.ZHOU YongChun FAN JiangWen ZHONG HuaPing ZHANG WenYan 2013Science China Earth Sciences2013,56,2:13
19C-reactive Protein Level,Apolipoprotein B-to-apolipoprotein A-1 Ratio,and Risks of Ischemic Stroke and Coronary Heart Disease among Inner Mongolians in China显示文摘Objective We aimed to investigate the cumulative effect of high CRP level and apolipoprotein B-to-apolipoprotein A-1(ApoB/ApoA-1) ratio on the incidence of ischemic stroke(IS) or coronary heart disease(CHD) in a Mongolian population in China.Methods From June 2003 to July 2012,2589 Mongolian participants were followed up for IS and CHD events based on baseline investigation.All the participants were divided into four subgroups according to C-reactive protein(CRP) level and ApoB/ApoA-1 ratio.Cox proportional hazard models were used to estimate the hazard ratios(HRs) and 95% confidence intervals(CIs) for the IS and CHD events in all the subgroups.Results The HRs(95% CI) for IS and CHD were 1.33(0.84-2.12),1.14(0.69-1.88),and 1.91(1.17-3.11) in the ‘low CRP level with high ApoB/ApoA-1',‘high CRP level with low ApoB/ApoA-1',and ‘high CRP level with high ApoB/ApoA-1' subgroups,respectively,in comparison with the ‘low CRP level with low ApoB/ApoA-1' subgroup.The risks of IS and CHD events was highest in the ‘high CRP level with high ApoB/ApoA-1' subgroup,with statistical significance.Conclusion High CRP level with high ApoB/ApoA-1 ratio was associated with the highest risks of IS and CHD in the Mongolian population.This study suggests that the combination of high CRP and ApoB/ApoA-1 ratio may improve the assessment of future risk of developing IS and CHD in the general population.TIAN Yun Fan ZHOU Yi Peng ZHONG Chong Ke BUREN Batu XU Tian LI Hong Mei ZHANG Ming Zhi WANG Ai Li ZHANG Yong Hong 2016Biomedical and Environmental Sciences2016,29,7:12
20Core-shell Au@MnO2 nanoparticles for enhanced radiotherapy via improving the tumor oxygenation显示文摘在稳固的肿瘤的本地组织缺氧经常导致抵抗到放射疗法(RT ) ,在哪个氧为提高 DNA 损坏的一个必要元素被电离引起放射。此处,我们开发了 gold@manganese 二氧化物(有聚乙烯乙二醇(木钉) 的 Au@MnO 2) 核心壳 nanoparticles 是的涂层在癌症治疗期间改进 RT 功效的一个新奇 radiosensitizing 代理人。在这 Au@MnO 2 nanostructure ,当金核心是著名 RT 时,交往与的 sensitizer X光检查为在 RT 下面杀死的改进癌症生产控告的粒子, MnO 2壳可以触发内长的 H 2在肿瘤微型环境到的 O 2产生氧并且克服 hypoxiaassociated RT 抵抗。是示威了由在 vitro 并且在 vivo 实验, Au@MnO 2-PEG nanoparticles 充当了有效 radiosensitizers 显著地在 RT 期间提高癌症治疗功效。而且, Au@MnO 2-PEG 的明显的副作用都没在老鼠被观察。因此,我们的工作为 hypoxic 肿瘤的提高的 RT 治疗与潜力介绍 radiosensitizer 的一种新类型。Xuan Yi Lei Chen Xiaoyan Zhong Roulin Gao Yitao Qian Fan Wu Guosheng Song Zhifang Chai Zhuang Liu Kai Yang 2016Nano Research2016,9,11:12
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