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1Effects of mixture ratio on anaerobic co-digestion with fruit and vegetable waste and food waste of China显示文摘The biochemical methane potentials for typical fruit and vegetable waste (FVW) and food waste (FW) from a northern China city were investigated,which were 0.30,0.56 m 3 CH 4/kgVS (volatile solids) with biodegradabilities of 59.3% and 83.6%,respectively.Individual anaerobic digestion testes of FVW and FW were conducted at the organic loading rate (OLR) of 3 kg VS/(m 3 ·day) using a lab-scale continuous stirred-tank reactor at 35℃.FVW could be digested stably with the biogas production rate of 2.17 m 3/(m 3 ·day) and methane production yield of 0.42 m 3 CH 4/kg VS.However,anaerobic digestion process for FW was failed due to acids accumulation.The effects of FVW:FW ratio on co-digestion stability and performance were further investigated at the same OLR.At FVW and FW mixing ratios of 2:1 and 1:1,the performance and operation of the digester were maintained stable,with no accumulation of volatile fatty acids (VFA) and ammonia.Changing the feed to a higher FW content in a ratio of FVW to FW 1:2,resulted in an increase in VFAs concentration to 1100-1200mg/L,and the methanogenesis was slightly inhibited.At the optimum mixture ratio 1:1 for co-digestion of FVW with FW,the methane production yield was 0.49 m 3 CH 4/kg VS,and the volatile solids and soluble chemical oxygen demand (sCOD) removal efficiencies were 74.9% and 96.1%,respectively.Jia Lin Jiane Zuo Lili Gan Peng Li Fenglin Liu Kaijun Wang Lei Chen Hainan Gan 2011Journal of Environmental Sciences2011,23,8:36
2Developing the Science Product Algorithm Testbed for Chinese Next-Generation Geostationary Meteorological Satellites:Fengyun-4 Series显示文摘Fengyun-4A(FY-4A), the first of the Chinese next-generation geostationary meteorological satellites, launched in2016, offers several advances over the FY-2: more spectral bands, faster imaging, and infrared hyperspectral measurements. To support the major objective of developing the prototypes of FY-4 science algorithms, two science product algorithm testbeds for imagers and sounders have been developed by the scientists in the FY-4 Algorithm Working Group(AWG). Both testbeds, written in FORTRAN and C programming languages for Linux or UNIX systems, have been tested successfully by using Intel/g compilers. Some important FY-4 science products, including cloud mask, cloud properties, and temperature profiles, have been retrieved successfully through using a proxy imager, Himawari-8/Advanced Himawari Imager(AHI), and sounder data, obtained from the Atmospheric Infra Red Sounder, thus demonstrating their robustness. In addition, in early 2016, the FY-4 AWG was developed based on the imager testbed—a near real-time processing system for Himawari-8/AHI data for use by Chinese weather forecasters.Consequently, robust and flexible science product algorithm testbeds have provided essential and productive tools for popularizing FY-4 data and developing substantial improvements in FY-4 products.Min MIN Chunqiang WU Chuan LI Hui LIU Na XU Xiao WU Lin CHEN Fu WANG Fenglin SUN Danyu QIN Xi WANG Bo LI Zhaojun ZHENG Guangzhen CAO Lixin DONG 2017Journal of Meteorological Research2017,31,4:35
3DUF221 proteins are a family of osmosensitive calciumpermeable cation channels conserved across eukaryotes显示文摘Congcong Hou Wang Tian Thomas Klelst Kai He Veder Garcia Fenglin Bai Yanli Hao Sheng Luan Legong Li 2014Cell Research2014,24,5:22
4A Combination of N2 and CO2 Adsorption to Characterize Nanopore Structure of Organic-Rich Lower Silurian Shale in the Upper Yangtze Platform, South China: Implications for Shale Gas Sorption Capacity显示文摘The pores in shales are mainly of nanometer-scale,and their pore size distribution is very important for the preservation and exploitation of shale gas.This study focused on the organic-rich Lower Silurian black shale from four wells in the Upper Yangtze Platform,and their TOC,mineralogical composition and pore characterization were investigated.Low pressure N_2 and CO_2 adsorption were conducted at 77.35 K and 273.15 K,respectively,and the pore structures were characterized by modified Brunauer-Emmett-Teller(BET),Dubinin-Radushkevich(DR),t-plot,BarrettJoyner-Halenda(BJH) and density functional theory(DFT) methods and then the relationship between pore structure and shale gas sorption capacity was discussed.The results indicate that(1) The Lower Silurian shale has high TOC content of 0.92%-4.96%,high quartz content of 30.6%-69.5%,and high clays content of 24.1%-51.2%.The total specific surface area varies from 7.56 m^2/g to 25.86 m^2/g.Both the total specific surface area and quartz content are positively associated with the TOC content.(2)Shale samples with higher TOC content have more micropores,which results in more complex nanopore structure.Micropore volumes/surface areas and non-micropore surface areas all increase with the increasing TOC content.(3) A combination of N_2 and CO_2 adsorption provides the most suitable detection range(~0.3-60 nm) and has high reliability and accuracy for nanopore structure characterization.(4) The TOC content is the key factor to control the gas sorption capacity of the Lower Silurian shale in the Upper Yangtze Platform.CHEN Lei JIANG Zhenxue LIU Keyu GAO Fenglin WANG Pengfei 2017Acta Geologica Sinica(English Edition)2017,91,4:21
5The Impact of the Linked Factors of Provenance,Tectonics and Climate on Potash Formation:An Example from the Potash Deposits of Lop Nur Depression in Tarim Basin,Xinjiang,Western China显示文摘Potash deposits commonly accumulate in highly restricted settings at the final stage of brine evaporation. This does not mean that potash deposits are formed simply as a result of the evaporation concentration of seawater or lake water, but rather as a coupling result of particular provenance, tectonics and climate activities. In this paper, we focus on the formative mechanism of the potash deposits of Lop Nur depression in Tarim Basin to interpret the detailed coupling mechanism among provenance, tectonics and climate. In terms of the provenance of Lop Nur Lake, the water of the Tarim River which displays 'potassium-rich' characteristics play an important role. In addition, the Pliocene and Lower-Middle Pleistocene clastic beds surrounding Lop Nur Lake host a certain amount of soluble potassium and thus serves as 'source beds' for potash formation. During the late Pliocene, the Lop Nur region has declined and evolved into a great lake from the previous piedmont and diluvial fan area. Since the mid Pleistocene, the great-united Lop Nur Lake has been separated and has generated a chain system consisting of Taitema Lake, Big Ear Lake and Luobei Lake which has turned into the deepest sag in Lop Nur Lake. Dry climate in Lop Nur region has increased since the Pliocene, and became extreme at the late Pleistocene. The study implies that potash formation in Lop Nur Lake depends on the optimal combination of extreme components of provenance, tectonics and climate during a shorter-term period. The optimal patterns of three factors are generally characterized by the long-term accumulation and preliminary enrichment of potassium, the occurrence of the deepest sub-depression and the appearance of an extremely arid climate in Lop Nur region. These factors have been interacting synergistically since the forming of the saline lake and in the later stages strong 'vapor extraction' caused by extremely arid climate is needed to trigger large scale mineralization of potash deposits.LIU Chenglin JIAO Pengcheng Lü Fenglin WANG Yongzhi SUN Xiaohong ZHANG Hua WANG Licheng YAO Fojun 2015Acta Geologica Sinica(English Edition)2015,89,6:18
6Isoliquiritigenin inhibits TGF-β1-induced fibrogenesis through activating autophagy via PI3K/AKT/mTOR pathway in MRC-5 cells显示文摘Isoliquiritigenin(ISL),a natural flavonoid derived from the root of liquorice,has been reported to possess anti-inflammatory and antioxidant activities.Previous studies have found that ISL plays a crucial role in anti-fibrosis of adipose tissue and renal tissue;however,its effect on pulmonary fibrogenesis has not been demonstrated.In this study,we aimed to explore the roles and the underlying mechanisms of ISL in TGF-β1-induced fibrogenesis using human lung fibroblast-derived MRC-5 cells.Cell proliferation and migration were determined by MTT and wound healing assay,respectively.The expression levels of alpha-smooth muscle actin(α-SMA),collagen type I alpha 1(COLIA1)and fibronectin(FN),microtubule-associated protein light chain 3(LC3)and related signaling molecules were detected by quantitative real-time PCR,western blot and immunofluorescence assay,correspondingly.EGFP-LC3 transfection was used for autophagy analysis.The results showed that ISL inhibited the TGF-β1-induced proliferation and migration,and down-regulated the expressions ofα-SMA,COLIA1 and FN.ISL treatment led to up-regulation of LC3 in TGF-β1-treated MRC-5 cells,accompanied by significant decrease in the phosphorylation levels of phosphatidylinositol 3-kinase(PI3K),protein kinase B(AKT),and mammalian target of rapamycin(mTOR).In addition,the inhibitory effects of ISL on TGF-β1-induced fibrogenic features in MRC-5 cells were enhanced by pretreatment with autophagy activator Rapmycin and PI3K/AKT inhibitor LY294002 and reversed by autophagy inhibitor 3-methyladenine and PI3K/AKT activator IGF-1.Taken together,our results demonstrated that ISL could attenuate the fibrogenesis of TGF-β1-treated MRC-5 cells by activating autophagy via suppressing the PI3K/AKT/mTOR pathway.Therefore,ISL holds a great potential to be developed as a novel therapeutic agent for the treatment of pulmonary fibrosis.Jinjuan He Hao Peng Meifang Wang Ying Liu Xingrong Guo Bin Wang Longjun Dai Xueqin Cheng Zhongji Meng Leyong Yuan Fenglin Cai Yijun Tang 2020Acta Biochimica et Biophysica Sinica2020,52,8:16
7Removing phosphorus from aqueous solutions by using iron- modified corn straw biochar显示文摘修改铁的玉米稻草 biochar 被用作吸附物把磷从农业流量移开。什么时候有一个总数的农业流量 1.86 mg ī的磷(TP )Fenglin LIU Jiane ZUO Tong CHI Pei WANG Bo YANG 2015Frontiers of Environmental Science & Engineering2015,9,6:13
8Simultaneous removal of COD and nitrogen using a novel carbon-membrane aerated biofilm reactor显示文摘膜给简历电影反应堆充气了是为废水处理的一种有希望的技术。在这研究,碳膜给简历电影反应堆(CMABR ) 充气了被开发了,到同时把碳 organics 和氮从一个反应堆移开。当它与 20 h 的一水力的保留时间(HRT ) 被操作,结果证明 CMABR 有一个高化学的氧要求(货到付款) 和氮移动效率,并且它也显示出完美的表演,就算 HRT 被弄短到 12 h。在这个时期,货到付款,氨氮(NH4+-N ) ,和总氮(TN ) 的移动效率分别地到达了 86% , 94% ,和 84% 。然而,当 HRT 被弄短到 8 h, NH4+-N 和 TN 的移动效率很快衰退了。这因为非编织的纤维和很高器官的装载率上的生物资源的过多的生长。荧光原位杂交(鱼) 分析显示氧化的氨细菌(AOB ) 主要在简历电影的内部层被散布。在一部简历电影的 AOB 和 eubacteria 的共存能提高货到付款和氮的同时的移动。HU Shaowei YANG Fenglin SUN Cui ZHANG Jianye WANG Tonghua 2008Journal of Environmental Sciences2008,20,2:12
9Graphene-supported nanoscale zero-valent iron:Removal of phosphorus from aqueous solution and mechanistic study显示文摘Excess phosphorus from non-point pollution sources is one of the key factors causing eutrophication in many lakes in China,so finding a cost-effective method to remove phosphorus from non-point pollution sources is very important for the health of the aqueous environment. Graphene was selected to support nanoscale zero-valent iron(nZVI)for phosphorus removal from synthetic rainwater runoff in this article. Compared with nZVI supported on other porous materials,graphene-supported nZVI(G-nZVI) could remove phosphorus more efficiently. The amount of nZVI in G-nZVI was an important factor in the removal of phosphorus by G-nZVI,and G-nZVI with 20 wt.% nZVI(20% G-nZVI)could remove phosphorus most efficiently. The nZVI was very stable and could disperse very well on graphene,as characterized by transmission electron microscopy(TEM) and scanning electron microscopy(SEM). X-ray photoelectron spectroscopy(XPS),Fourier Transform infrared spectroscopy(FT-IR) and Raman spectroscopy were used to elucidate the reaction process,and the results indicated that Fe-O-P was formed after phosphorus was adsorbed by G-nZVI. The results obtained from X-ray diffraction(XRD) indicated that the reaction product between nZVI supported on graphene and phosphorus was Fe3(PO4)2·8H2O(Vivianite). It was confirmed that the specific reaction mechanism for the removal of phosphorus with nZVI or G-nZVI was mainly due to chemical reaction between nZVI and phosphorus.Fenglin Liu JingHe Yang Jiane Zuo Ding Ma Lili Gan Bangmi Xie Pei Wang Bo Yang 2014Journal of Environmental Sciences2014,26,8:12
10Monte Carlo Method for the Uncertainty Evaluation of Spatial Straightness Error Based on New Generation Geometrical Product Specification显示文摘Straightness error is an important parameter in measuring high-precision shafts. New generation geometrical product specification(GPS) requires the measurement uncertainty characterizing the reliability of the results should be given together when the measurement result is given. Nowadays most researches on straightness focus on error calculation and only several research projects evaluate the measurement uncertainty based on 'The Guide to the Expression of Uncertainty in Measurement(GUM)'. In order to compute spatial straightness error(SSE) accurately and rapidly and overcome the limitations of GUM, a quasi particle swarm optimization(QPSO) is proposed to solve the minimum zone SSE and Monte Carlo Method(MCM) is developed to estimate the measurement uncertainty. The mathematical model of minimum zone SSE is formulated. In QPSO quasi-random sequences are applied to the generation of the initial position and velocity of particles and their velocities are modified by the constriction factor approach. The flow of measurement uncertainty evaluation based on MCM is proposed, where the heart is repeatedly sampling from the probability density function(PDF) for every input quantity and evaluating the model in each case. The minimum zone SSE of a shaft measured on a Coordinate Measuring Machine(CMM) is calculated by QPSO and the measurement uncertainty is evaluated by MCM on the basis of analyzing the uncertainty contributors. The results show that the uncertainty directly influences the product judgment result. Therefore it is scientific and reasonable to consider the influence of the uncertainty in judging whether the parts are accepted or rejected, especially for those located in the uncertainty zone. The proposed method is especially suitable when the PDF of the measurand cannot adequately be approximated by a Gaussian distribution or a scaled and shifted t-distribution and the measurement model is non-linear.WEN Xiulan XU Youxiong LI Hongsheng WANG Fenglin SHENG Danghong 2012Chinese Journal of Mechanical Engineering2012,25,5:10
11Expanded endoscopic therapy criteria should be cautiously used in intramucosal gastric cancer显示文摘Objective: Accurate estimation of lymph node metastasis(LNM) in intramucosal gastric cancer is essential to select less invasive treatment options and even avoid surgery. The aim of this study was to evaluate combined clinicopathological features to predict the presence of LNM.Methods: A retrospective review of data from 386 intramucosal gastric cancer patients who underwent gastrectomy with extended lymphadenectomy from 2003 to 2010 was conducted. The mutual relation between clinicopathological characteristics and LNM was analyzed.Results: LNM was detected in 40(10.4%) of the 386 patients. Histological type and vascular or lymphatic invasion presence showed a positive correlation with LNM occurrence by univariate analysis. Multivariate analysis revealed that histological type was the only factor associated with LNM. Combined clinicopathologic characteristics would be more predictable for LNM. We found no LNM when we used combined clinicopathological characteristics conforming to Japanese absolute indications for endoscopic therapy. The LNM rate was as high as 8.7% when Japanese expanded criteria were used. Univariate analysis in cancer conformity to expand endoscopic submucosal dissection(ESD) indication also revealed that the undifferential type was the only significant factor for LNM.Conclusions: It was possible to predict intramucosal gastric cancer cases without LNM using combined clinicopathological characteristic analysis. Extended indication for ESD should be cautiously used for intramucosal gastric cancer patients.Hongshan Wang Heng Zhang Cong Wang Yong Fang Xuefei Wang Weidong Chen Fenglin Liu Kuntang Shen Xinyu Qin Zhenbin Shen Yihong Sun 2016Chinese Journal of Cancer Research2016,28,3:8
12Effect of Yang-activating and stasis-eliminating decoction from Traditional Chinese Medicine on intestinal mucosal permeability in rats with ulcerative colitis induced by dextran sulfate sodium显示文摘OBJECTIVE: To evaluate the effect of decoction prepared with Yang-activating and stasis-eliminating medicinals from Traditional Chinese Medicine(TCM) on the intestinal mucosal permeability in rats with ulcerative colitis induced by dextran sulfate sodium(DSS).METHODS: Totally 55 male Wistar rats(body weight of 170-190 g) were randomly divided into the blank group(n = 10) and the model duplication group(n = 45). The blank group was not intervened, while the other was modeled with 5% dextran sulfate sodium by gavaging in a dosage of4 m L per day to induce ulcerative colitis, a total of7 days. Then, the model rats were divided into model blank group, mesalazine group and TCM group,and each group was consisted of 15 rats. They were given retention enema 10 min with normal saline,mesalazine enema(0.036 g/m L), and Yang-activating and stasis-eliminating decoction [0.54 g/m L of a decoction boiled by Puhuang(Pollen Typhae), Xiebai(Bulbus Allii Macrostemonis) and Wulingzhi(Faeces Trogopteri)] for 10 days respectively. Afterwards,all of the rats were evaluated by disease activity index(DAI), histological changes of distal colon, expression of occludin protein and ultrastructure of intestinal epithelial cells. Furthermore, ratio of lactulose to mannitol(L/M) discharged in urine was evaluated.RESULTS: Comparing the results between TCM and model control groups, scores of DAI and histological lesions decreased significantly(P = 0.000 <0.01), ultrastructures of intestinal epithelial cells and tight junctions were more complete. The expression of occludin protein(P = 0.001 < 0.01) increased while the L/M value decreased significantly(P = 0.000 < 0.01) in TCM group. There was no statistical difference between the TCM and mesalazine groups in results of each item(P > 0.05).CONCLUSION: The decoction prepared with Yang-activating and stasis-eliminating TCM medicianls can restore intestinal mucosal epithelial cells and tight junctions the model rats with ulcerative colitis; it can reduce histological lesions and protect the permeability of intestinal mucosa barrier in the rats as well.Shi Lijie Shi Lei Liu Leilei Feng Xiuxian Wang Jing Yang Qiang Chai Shiwei Gou Jing Zang Fenglin He Sufei 2017Journal of Traditional Chinese Medicine2017,37,4:7
13Correlation between Traditional Chinese Medicine symptom patterns and serum concentration of zinc,iron,copper and magnesium in patients with hepatitis B and associated liver cirrhosis显示文摘OBJECTIVE:To investigate the correlation between the patterns of Traditional Chinese Medicine(TCM)syndromes and the serum concentration of zinc,iron,copper and magnesium of patients with chronic hepatitis B(CHB) and hepatitis B virus(HBV)-induced liver cirrhosis.METHODS:A total of 86 patients were included in the study between March 1,2009 and January 1,2010.All were diagnosed with CHB or HBV-induced liver cirrhosis according to the diagnosis standard of the Chinese Medical Association.Fasting serum concentrations of zinc,iron,copper and magnesium were measured.Patients were classified into different patterns of TCM symptoms according to TCM theory and clinical experience.RESULTS:In the HBV-induced liver cirrhosis group,the mean zinc concentration in patients with the TCM pattern of stagnation of fluid-Dampness was lower than that in patients with obstruction of collaterals by Blood stasis(P < 0.034).In the CHB group,the mean magnesium concentration in patients with toxic Heat flourishing was significantly lower than that in those with Damp-Heat in the Liver and Gallbladder,and those with Liver depression and Spleen deficiency(P < 0.021).The concentrations of iron and copper showed little difference among the different TCM symptom patterns.CONCLUSION:The serum zinc and magnesium concentrations correlated with certain TCM patterns of symptoms in patients with HBV-induced liver cirrhosis and CHB.It may be helpful to interpret the pathogenic change in the TCM symptom patterns in liver cirrhosis and CHB,and also to conduct clinical treatment of the diseases based on identified TCM patterns.Teng Lichun Zhang Jiongshan Dai Min Wang Fenglin Yang Hongzhi 2015Journal of Traditional Chinese Medicine2015,35,5:6
14Archean-Paleoproterozoic Lithospheric Mantle at the Northern Margin of the North China Craton Represented by Tectonically Exhumed Peridotites显示文摘Tectonically emplaced peridotites from North Hebei Province, North China Craton, have retained an original harzburgite mineral assemblage of olivine(54%–58%) + orthopyroxene(40%–46%)+minor clinopyroxene(<1%)+spinel. Samples with boninite-like chemical compositions also coexist with these peridotites. The spinels within the peridotites have high-Al end-members with Al_2O_3 content of 30 wt % –50 wt %, typical of mantle spinels. When compared with experimentally determined melt extraction trajectories, the harzburgites display a high degree of melting and enrichment of SiO_2, which is typical of cratonic mantle peridotites. The peridotites display variably enriched light rare earth elements(REEs), relatively depleted middle REEs and weakly fractionated heavy REEs, which suggest a melt extraction of over 25% in the spinel stability field. The occurrence of arc-and SSZ-type chromian spinels in the peridotites suggests that melt extraction and metasomatism occurred mostly in a subduction-related setting. This is also supported by the geochemical data of the coexisting boninite-like samples. The peridotites have ^(187)Os/^(188)Os ratios ranging from 0.113–0.122, which is typical of cratonic lithospheric mantle. These ^(187)Os/^(188)Os ratios yield model melt extraction ages(TRD) ranging from 981 Ma to 2054 Ma, which may represent the minimum estimation of the melt extraction age. The Al_2O_3-^(187)Os/^(188)Os-proxy isochron ages of 2.4 Ga–2.7 Ga suggest a mantle melt depletion age between the Late Achaean and Early Paleoproterozoic. Both the peridotites and boninite-like rocks are therefore interpreted as tectonically exhumed continental lithospheric mantle of the North China Craton, which has experienced mantle melt depletion and subduction-related mantle metasomatism during the Neoarchean-Paleoproterozoic.TIAN Wei WANG Shuangyue LIU Fenglin CHU Zhuyin WANG Bin CHEN Mimi Jennifer PRICHARD 2017Acta Geologica Sinica(English Edition)2017,91,6:5
15Anatomical variation of infra-pyloric artery origination: A prospective multicenter observational study (IPA-Origin)显示文摘Objective: Infra-pyloric artery(IPA) is an important anatomical landmark in treatment of gastric cancer and is the key vessel for pylorus-preserving gastrectomy and subgroup of infra-pyloric lymph nodes. However, its anatomical variation is not thoroughly understood. Our study aimed to clarify the origination of the IPA.Methods: We did this prospective, multicenter, open-label, observational study at gastric surgery departments of34 hospitals in China. Gastric cancer patients aged 18 years or older and scheduled to undergo elective total or distal gastrectomy were assigned. During the surgery, IPA dissecting and exposing the origination point with photographs or video clips were required. The primary outcome was the origination of the IPA. Analysis of variance, χ~2 tests and Fisher's tests were used to analyze the differences between groups. The study is registered at Clinicaltrials.gov(No. NCT03071237).Results: Between May 8 and July 31, 2017, 429 patients were assigned for the study, and 419(97.7%) patients had the IPA dissected and recorded through photograph or video and were included in the primary outcome analysis. The median age was 62 years old, and 73.7% were male. Among the patients, 78.5% received laparoscopic surgery. Single IPA origination was identified in 398(95.0%) patients, including gastroduodenal artery(GDA) in154(36.8%) patients, anterior superior pancreaticoduodenal artery(ASPDA) in 130(31.0%) patients, and right gastroepiploic artery(RGEA) in 114(27.2%) patients. Fifteen(3.6%) patients were identified with multiple IPA and 6(1.4%) patients were identified as IPA absence. The differences in the distribution of surgical approach(P=0.003) and geographic area(P=0.030) were statistically significant. No difference was shown in sex, age,gastrectomy type, tumor location, and clinical T, N and M stage.Conclusions: Our study found that the IPA originates from GDA, ASPDA and RGEA in similar proportions.Laparoscopic surgery may be more helpful in dissection of the IPA than open surgery.Rulin Miao Jianjun Qu Zhengrong Li Daguang Wang Jiang Yu Weidong Zang Yong Li Fenglin Liu Jian Zhang Wu Song Kai Ye Su Yan Wei Wang Shuangyi Ren Lu Zang Changqing Jing Li Zhang Kuan Wang Weihua Fu Lin Fan Bin Liang Gang Zhao Jun Cai Li Yang Jiaming Zhu Jun You Kun Yang Qingxing Huang Zhaojian Niu Ning Ning Xingfeng Qiu Gang Ji Feng Liang Hua Huang Chao Gao Fei Shan Shuangxi Li Yongning Jia Lianhai Zhang Xiangji Ying Yan Zhang Zhaode Bu Xiangqian Su Gang Zhao Ziyu Li Jiafu Ji 2018Chinese Journal of Cancer Research2018,30,5:5
16The influence of volcanism on paleoclimate in the northeast of China:Insights from Jinchuan peat,Jilin Province,China显示文摘Just like contemporary sediments, peat itself is a good repository of information about climate change, the effects of volcanic activity on climate change have been truly recorded in peat, since it is a major archive of volcanic eruption incidents. A section of sand was identified as tephra from the Jinchuan peat, Jilin Province, China, for the grains look like slag with surface bubbles and pits, characterized by high porosity, and loose structure with irregular edges and corners. According to the peat characteristics of uniform deposition, the tephra was dated at 2002-1976 a B.P. by way of linear interpolation, so the time of volcanic eruption was 15 B.C.-26 A.D. (the calibrated age). While the geochemical characteristics of tephra in this study are quite the same as those of tephra from the Jinlongdingzi volcano at Longgang and from alkaline basaltic magma, with the contents of SiO2<55%, and the similar contents to Al2O3 and Fe, but the contents of Na2O>K2O. We speculated that the tephra in this study came from the Longgang volcano group. Compared with 11 recorded volcanic eruption events as shown on the carbon and oxygen isotope curves of the Jinchuan peat cellulose, it is obviously seen that adjacent or large-scale volcanic eruptions are precisely corresponding to the minimum temperature and humidity. It seems that these volcanic eruptions indeed affected the local climate, leading to the drop of regional temperature and humidity. As a result, there was prevailing a cold and dry climate there, and all these changes can be well recorded in peat. So the comparison of volcanic eruption events with information about climate change developed from peat, can provide strong evidence for the impact of volcanism on climate change.MAO Xumei CHENG Shenggao HONG Yetang ZHU Yongxuan WANG Fenglin 2009Chinese Journal Of Geochemistry2009,28,2:5
17Imaging the mantle transition zone beneath eastern and central China with CEArray receiver functions显示文摘We analyzed a total of 37 427 receiver-function data recorded by national and regional broadband seismic networks of the China Earthquake Administration to study the mantle transition zone beneath eastern and central China.Significant topography on both the 410-km and 660-km discontinuities was clearly imaged in the 3D volume of CCP (common-conversion-point) stacked images that cover an area of 102.5 E-122.5 E and 22.0 N-42.0 N.3D crustal and mantle velocity models were used in computing the Ps time moveouts to better image the absolute depths of the two discontinuities.We found that the 660-km discontinuity is depressed up to 25 km along the east coast of China,indicating the presence of the subducted Pacific slab in the region.More interestingly,a double 660-km was observed beneath the Huanghai Sea,which was not seen from the 410-km discontinuity.We found a strong and localized anomaly beneath the Quaternary Datong volcano located at the northeastern edge of the Ordos Plateau in North China.The 410-km is depressed by as much as 15 km beneath the volcano.If the amount of the depression is caused by unmodeled low velocity anomaly in the upper mantle,it requires either a strong (4%-8%) localized low velocity anomaly near the lithosphere-asthenosphere boundary or ~1.5% low velocity column across the entire upper mantle above the 410-km.The latter could suggest a deep origin of the Datong volcano,although it was usually attributed to edge-driven convection by most of the literatures.Xinling Wang Fenglin Niu 2011Earthquake Science2011,24,1:4
18A Real-Time Photo-Realistic Rendering Algorithm of Ocean Color Based on Bio-Optical Model显示文摘A real-time photo-realistic rendering algorithm of ocean color is introduced in the paper, which considers the impact of ocean bio-optical model. The ocean bio-optical model mainly involves the phytoplankton, colored dissolved organic material(CDOM), inorganic suspended particle, etc., which have different contributions to absorption and scattering of light. We decompose the emergent light of the ocean surface into the reflected light from the sun and the sky, and the subsurface scattering light. We establish an ocean surface transmission model based on ocean bidirectional reflectance distribution function(BRDF) and the Fresnel law, and this model's outputs would be the incident light parameters of subsurface scattering. Using ocean subsurface scattering algorithm combined with bio-optical model, we compute the scattering light emergent radiation in different directions. Then, we blend the reflection of sunlight and sky light to implement the real-time ocean color rendering in graphics processing unit(GPU). Finally, we use two kinds of radiance reflectance calculated by Hydrolight radiative transfer model and our algorithm to validate the physical reality of our method, and the results show that our algorithm can achieve real-time highly realistic ocean color scenes.MA Chunyong XU Shu WANG Hongsong TIAN Fenglin CHEN Ge 2016Journal of Ocean University of China2016,15,6:4
19Methanogenic community dynamics in anaerobic co-digestion of fruit and vegetable waste and food waste显示文摘A lab-scale continuously-stirred tank reactor (CSTR), used for anaerobic co-digestion of fruit and vegetable waste (FVW) and food waste (FW) at different mixture ratios, was operated for 178 days at the organic loading rate of 3 kg VS (volatile solids)/(m3·day). The dynamics of the Archaeal community and the correlations between environmental variables and methanogenic community structure were analyzed by polymerase chain reactions-denaturing gradient gel electrophoresis (PCR-DGGE) and redundancy analysis (RDA), respectively. PCR-DGGE results demonstrated that the mixture ratio of FVW to FW altered the community composition of Archaea. As the FVW/FW ratio increased, Methanoculleus, Methanosaeta and Methanosarcina became the predominant methanogens in the community. Redundancy analysis results indicated that the shift of the methanogenic community was significantly correlated with the composition of acidogenic products and methane production yield. Different mixture ratios of substrates led to different compositions of intermediate metabolites, which may affect the methanogenic community. These results suggested that the analysis of microbial communities could be used to diagnose anaerobic processes.Jia Lin Jiane Zuo Ruofan Ji Xiaojie Chen Fenglin Liu Kaijun Wang Yunfeng Yang 2012Journal of Environmental Sciences2012,24,7:4
20Orthogonal Test Optimization of Extraction Technology of Total Fla-vonoids from Fruits and Leaves of Prunus mume Sieb. et Zucc. and Its in Vitro Anti-oxidation Activity显示文摘[Objectives]To optimize the extraction technology of total flavonoids component,and investigate its in vitro anti-oxidation activity.[Methods]The single factor was inspected firstly. By orthogonal experiment,the best extraction conditions of total flavonoids from fruits and leaves of P. mume Sieb. et Zucc. were determined,and reducing ability of the extracted total flavonoids and its DPPH and ABTS scavenging abilities were explored. [Results] The best extraction technology conditions: solid-liquid ratio of 1∶ 50,ethanol concentration of 50%,extraction time of 2. 5 h,extraction temperature of 85 ℃,two-time extraction. By detecting DPPH and ABTS scavenging abilities of total flavonoids,the anti-oxidation activity of the total flavonoids from fruits and leaves of P. mume Sieb. et Zucc. was analyzed and evaluated. [Conclusions]Fruits and leaves of P. mume Sieb. et Zucc. had a certain in vitro anti-oxidation activity,and heat reflux extraction method of its total flavonoids had high extraction rate and simple and convenient operation,which had some practical value.Xue ZHAI Qian JIN Haiyan XIANG Fenglin WANG Yuan LIU 2017Medicinal Plant2017,8,2:4
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