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1Diamonds and Other Exotic Minerals Recovered from Peridotites of the Dangqiong Ophiolite, Western Yarlung-Zangbo Suture Zone, Tibet显示文摘Various combinations of diamond, moissanite, zircon, quartz, corundum, rutile, titanite, almandine garnet, kyanite, and andalusite have been recovered from the Dangqiong peridotites. More than 80 grains of diamond have been recovered, most of which are pale yellow to reddish-orange to colorless. The grains are all 100-200 μm in size and mostly anhedral, but with a range of morphologies including elongated, octahedral and subhedral varieties. Their identification was confirmed by a characteristic shift in the Raman spectra between 1325 cm^(-1) and 1333 cm^(-1), mostly at 1331.51 cm^(-1) or 1326.96 cm^(-1). Integration of the mineralogical, petrological and geochemical data for the Dongqiong peridotites suggests a multi-stage formation for this body and similar ophiolites in the Yarlung-Zangbo suture zone. Chromian spinel grains and perhaps small bodies of chromitite crystallized at various depths in the upper mantle, and encapsulated the UHP, highly reduced and crustal minerals. Some oceanic crustal slabs containing the chromian spinel and their inclusion were later trapped in suprasubduction zones(SSZ), where they were modified by island arc tholeiitic and boninitic magmas, thus changing the chromian spinel compositions and depositing chromitite ores in melt channels.XIONG Fahui YANG Jingsui ROBINSON Paul T. XU Xiangzhen BA Dengzhu LI Yuan ZHANG Zhongming RONG He 2016Acta Geologica Sinica(English Edition)2016,90,2:20
2Flavonoid profiling of a traditional Chinese medicine formula of Huangqin Tang using high performance liquid chromatography显示文摘The quality control processes for herbal medicines have been problematic. Flavonoids are the major active components of Huangqin Tang(HQT, a traditional Chinese medicine formula). In this study, we used a combinative method approach consisting of chromatographic fingerprinting(high performance liquid chromatography; HPLC), quantitative methods and a pharmacodynamic evaluation model to analyze the flavonoids of HQT obtained from different sources. Ten batches of HQT were analyzed by the HPLC fingerprinting method and 26 common peaks were detected, of which 23 peaks corresponded with the chemical profile of HQT. In addition, 11 major compounds were identified by LC–MS analysis(liquid chromatography–tandem mass spectrometer; LC–MS^n) and quantified by the HPLC quantitative method approach. The studied10 batches of HQT were found to be homogeneous in their composition with a similarity between 0.990 and1.000. The distribution of the 11 identified compounds was found to be very similar among the batches. Only slight pharmacodynamic differences were detected between the different batches, confirming the homogeneity of HQT. The results of this study prove that the combination of chromatographic fingerprinting and quantitative analysis can be readily used for comprehensive quality control of herbal medicines.Tao Li Shuaixing Zhuang Yiwei Wang Yanli Wang Weihao Wang Huihui Zhang Li Chen Dunfang Wang Zhongming Zhou Weipeng Yang 2016Acta Pharmaceutica Sinica B2016,6,2:19
3Application of ^(137)Cs fingerprinting technique to interpreting sediment production records from reservoir deposits in a small catchment of the Hilly Loess Plateau,China显示文摘According to variations of 137Cs and clay contents, 44 flood couplets were identified in a profile of res- ervoir deposit with a vertical length of 28.12 m in the Yuntaishan Gully. Couplet 27 at the middle of the profile had the highest average 137Cs content of 12.65 Bq·kg?1, which indicated the 1963s' deposits, then 137Cs content decreased both downward and upward in the profile. The second top and bottom couplets had average 137Cs contents of 2.15 Bq·kg?1 and 0.92 Bq·kg?1, respectively. By integrated analysis of reservoir construction and management history, variations of 137Cs contents over the profile, sediment yields of flood couplets and rainfall data during the period of 1958-1970, individual storms related to the flood couplets were identified. 44 floods with a total sediment yield of 2.36×104 m3 occurred and flood events in a year varied between 1 and 10 times during the period of 1960-1970. 7-10 flood events occurred during the wet period of 1961-1964 with very wet autumn, while only 1-2 events during the dry period of 1965-1969. Average annual specific sediment yield was 1.29×104 t·km?2·a?1 for the Yuntaishan Gully during the period of 1960-1970, which was slightly higher than 1.11 ×104 t·km?2·a?1 for the Upper Yanhe River Basin above the Ganguyi Hydrological Station and slightly lower than 1.40 ×104 t·km?2·a?1 for the nearby Zhifang Gully during the same period. Annual specific sediment yields for the Yuntaishan Gully were correlated to the wet season's rainfalls well.ZHANG XinBao WEN ZhongMing FENG MingYi YANG QinKe ZHENG JinJun 2007Science China Earth Sciences2007,50,2:13
4Diamond Discovered in High-Al Chromitites of the Sartohay Ophiolite,Xinjiang Province,China显示文摘In recent years diamonds and other exotic minerals have been recovered from mantle peridotites and high-Cr chromitites of a number of ophiolites of different age and different tectonic environments. Here we report a similar collection of minerals from the Sartohay ophiolite of Xinjiang Province,western China,which is characterized by having high-Al chromitites. Several samples of massive podiform chromitite with an aggregate weight of nearly 900 kg yielded diamonds,moissanite and other highly reduced minerals,as well as common crustal minerals. Thus far,more than 20 grains each of diamond and moissanite have been recovered from heavy mineral separates of the chromitites. The diamonds are all 100-200 μm in size and range in color from pale yellow to reddish-orange to colorless. Most of the grains are anhedral to subhedral octahedra,commonly with elongate forms exhibiting well-developed striations. They all display characteristic Raman spectra with shifts between 1325 cm-1 and 1333 cm-1,mostly 1331.51 cm-1 or 1326.96 cm-1. The moissanite grains are light blue to dark blue,broken crystals,50-150 μm across,commonly occurring as small flakes or fragments. Their typical Raman spectra have shifts at 762 cm-1,785 cm-1,and 966 cm-1. This investigation extends the occurrence of diamonds and moissanite to a Paleozoic ophiolite in the Central Asian Orogenic Belt and demonstrates that these minerals can also occur in high-Al chromitites. We conclude that diamonds and moissanite are likely to be ubiquitous in ophiolitic mantle peridotites and chromitites.TIAN Yazhou YANG Jingsui Paul T.ROBINSON XIONG Fahui LI Yuan ZHANG Zhongming LIU Zhao LIU Fei NIU Xiaolu 2015Acta Geologica Sinica(English Edition)2015,89,2:9
5Diamonds Discovered from High–Cr Podiform Chromitites of Bulqiza,Eastern Mirdita Ophiolite,Albania显示文摘Various combinations of diamond, moissanite, zircon, corundum, rutile and titanitehave been recovered from the Bulqiza chromitites. More than 10 grains of diamond have been recovered, most of which are pale yellow to reddish–orange to colorless. The grains are all 100–300 μm in size and mostly anhedral, but with a range of morphologies including elongated, octahedral and subhedral varieties. Their identification was confirmed by a characteristic shift in the Raman spectra between 1325 cm^(-1) and 1333 cm^(-1), mostly at 1331.51 cm^(-1) or 1326.96 cm^(-1). This investigation extends the occurrence of diamond and moissanite to the Bulqiza chromitites in the Eastern Mirdita Ophiolite. Integration of the mineralogical, petrological and geochemical data of the Bulqiza chromitites suggests their multi–stage formation. Magnesiochromite grains and perhaps small bodies of chromitite formed at various depths in the upper mantle, and encapsulated the ultra–high pressure, highly reduced and crustal minerals. Some oceanic crustal slabs containing the magnesiochromite and their inclusion were later trapped in suprasubduction zones, where they were modified by tholeiitic and boninitic arc magmas, thus changing the magnesiochromite compositions and depositing chromitite ores in melt channels.XIONG Fahui YANG Jingsui ROBINSON Paul T. DILEK Yildirim MILUSHI Ibrahim XU Xiangzhen ZHOU Wenda ZHANG Zhongming RONG He 2017Acta Geologica Sinica(English Edition)2017,91,2:9
6The Discovery of Diamonds in Chromitites of the Hegenshan Ophiolite,Inner Mongolia,China显示文摘Diamond,moissanite and a variety of other minerals,similar to those reported from ophiolites in Tibet and northern Russia,have recently been discovered in chromitites of the Hegenshan ophiolite of the Central Asian Orogenic Belt,north China. The chromitites are small,podiform and vein-like bodies hosted in dunite,clinopyroxene-bearing peridotite,troctolite and gabbro. All of the analysed chromite grains are relatively Al-rich,with Cr# [100Cr/(Cr+Al)] of about 47–53. Preliminary studies of mainly disseminated chromitite from ore body No. 3756 have identified more than 30 mineral species in addition to diamond and moissanite. These include oxides(mostly hematite,magnetite,rutile,anatase,cassiterite,and quartz),sulfides(pyrite,marcasite and others),silicates(magnesian olivine,enstatite,augite,diopside,uvarovite,pyrope,orthoclase,zircon,sphene,vesuvianite,chlorite and serpentine) and others(e.g.,calcite,monazite,glauberite,iowaite and a range of metallic alloys). This study demonstrates that diamond,moissanite and other exotic minerals can occur in high-Al,as well as high-Cr chromites,and significantly extends the geographic and age range of known diamond-bearing ophiolites.HUANG Zhu YANG Jingsui Paul T.ROBINSON ZHU Yongwang XIONG Fahui LIU Zhao ZHANG Zhongming XU Wei 2015Acta Geologica Sinica(English Edition)2015,89,2:6
7INFLUENCE OF Al-5Ti-1B MASTER ALLOY ON MICROSTRUCTURE AND DAMPING CAPACITY OF ZA27 ALLOY显示文摘1INTRODUCTIONThedampingcapacityofamaterialisameasureoftheenergythatisdissipatedinthematerialduringmechanicalvibrationundercyc...Zhang, Zhongming Wang, Jincheng Lu, Yili Song, Guangsheng Yang, Gencang Zhou, Yaohe 1998中国有色金属学会会刊:英文版1998,8,3:5
8The diversity effect of inductive reasoning under segment manipulation of complex cognition显示文摘The present study proposed the idea of segment manipulation of complex cognition (SMCC), and technically made it possible the quantitative treatment and systematical manipula-tion on the premise diversity. The segment manipulation of complex cognition divides the previ-ous inductive strengths judgment task into three distinct steps, attempting to particularly distin-guish the psychological processes and their rules. The results in Experiment 1 showed that compared with the traditional method, the quantitative treatment and systematical manipulation of SMCC on the diversity did not change the task’s nature, and remain rational and a good measurement of inductive strength judgment. The results in Experiment 2 showed that the par-ticipants’ response rules in the triple-step task were expected from our proposal, and that in Step 2 the “feeling of surprise” (FOS), which seems implausible but predicted from the diversity premises, was measured, and its component might be the critical part that produced the diversity effect. The “feeling of surprise” may reflect the impact of emotion on cognition, representing a strong revision to premise probability principle of pure rational hypothesis proposed by Lo et al., and its roles in the diversity effect are worthy of further research. In this regards were discussed the mistakes that the premise probability principle makes when it takes posterity probability as prior probability.CHEN Antao LI Hong FENG Tingyong GAO Xuemei ZHANG Zhongming LI Fuhong YANG Dong 2005Science China(Life Sciences)2005,48,6:5
9MiR319-targeted OsTCP21 and OsGAmyb regulate tillering and grain yield in rice显示文摘Multiple genes and microRNAs(miRNAs)improve grain yield by promoting tillering.MiR319s are known to regulate several aspects of plant development;however,whether miR319s are essential for tillering regulation remains unclear.Here,we report that miR319 is highly expressed in the basal part of rice plant at different development stages.The miR319 knockdown line Short Tandem Target Mimic 319(STTM319)showed higher tiller bud length in seedlings under low nitrogen(N)condition and higher tiller bud number under high N condition compared with the miR319a-overexpression line.Through targets prediction,we identified OsTCP21 and OsGAmyb as downstream targets of miR319.Moreover,OsTCP21 and OsGAmyb overexpression lines and STTM319 had increased tiller bud length and biomass,whereas both were decreased in OsTCP21 and OsGAmyb knockout lines and OE319a.These data suggest that miR319 regulates rice tiller bud development and tillering through targeting OsTCP21 and OsGAmyb.Notably,the tiller number and grain yield increased in STTM319 and overexpression lines of OsTCP21 and OsGAmyb but decreased in OE319a and knockout lines of OsTCP21 and OsGAmyb.Taken together,our findings indicate that miR319s negatively affect tiller number and grain yield by targeting OsTCP21 and OsGAmyb,revealing a novel function for miR319 in rice.Rongna Wang Xiuyan Yang Shuang Guo Zhaohui Wang Zhanhui Zhang Zhongming Fang 2021Journal of Integrative Plant Biology2021,63,7:4
10Construction of a chloroplast protein interaction network and functional mining of photosynthetic proteins in Arabidopsis thaliana显示文摘叶绿体是光合作用发生的一个典型植物细胞细胞器。在这研究,在 Arabidopsis thaliana 的 1 808 叶绿体核心蛋白质的一个总数被联合以前出版的研究和我们的自己的预言的结果可靠地识别。我们然后首先基于这些核心蛋白质相互作用构造了一个叶绿体蛋白质相互作用网络。网络有 22 包含了 2 的 925 蛋白质相互作用对 214 蛋白质。160 的一个总数以前, uncharacterized 蛋白质在这个网络被注解。光合的建筑群的子单元被模块化,并且在 photosystem 之中的功能的关系我(希腊语的第二十三个字母), photosystem II ( PSII ), photosystem 的轻收获建筑群我( LHC 我)并且 photosystem 的轻收获建筑群( LHC II )我能在这个网络从预言的蛋白质相互作用被推出。我们进一步由酵母证实了在未知蛋白质 AT1G52220 和光合的子单元 PSI-D2 之间的一个相互作用二混血儿的分析。我们的叶绿体蛋白质相互作用网络应该为光合的蛋白质的功能的采矿和在在 Arabidopsis 的系统生物学水平的叶绿体相关的函数的调查是有用的。Qing-Bo Yu Guang Li Guan Wang Jing-Chun Sun Peng-Cheng Wang Chen Wang Hua-Ling Mi Wei-Min Ma Jian Cui Yong-Lan Cui Kang Chong Yi-Xue Li Yu-Hua Li Zhongming Zhao Tie-LiuShi Zhong-Nan Yang 2008Cell Research2008,18,10:4
11Nonvolatile memristor based on heterostructure of 2D room-temperature ferroelectric α-In2Se3 and WSe2显示文摘Two-dimensional(2D) ferroelectricity is considered to have significant potential for information storage in the future. Semiconducting ferroelectrics that are stable at room temperature afford many possibilities for the assembly of various high-performance heterostructures and fabricating multifuntional devices.Herein, we report the synthesis of a stable van der Waals(vd W) single-crystal semiconductor α-In2 Se3.Piezoresponse force microscopy(PFM) measurements demonstrated the out-of-plane ferroelectricity in ~15 layers α-In2 Se3 at room temperature. Both ferroelectric domains with opposite polarization and the tested amplitude and phase curve proved that this semiconductor exhibits hysteresis behavior during polarization.In the α-In2Se3/WSe2 vertical heterostructure device, the switchable diode effect and nonvolatile memory phenomenon showed a high on/off ratio and a small switching voltage. The distinct resistance switches were further analyzed by band alignment of the heterostructure under different polarizations by first principle calculations. Nonvolatile memory based on vd W ferroelectric heterostructure could provide a novel platform for developing 2 D room-temperature ferroelectrics in information storage.Huai YANG Mengqi XIAO Yu CUI Longfei PAN Kai ZHAO Zhongming WEI 2019Science China(Information Sciences)2019,62,12:3
12Influence of RE Content on Damping Capacity of Alloy ZA27显示文摘Thedampingcapacityofmaterialsisameasureoftheenergythatisdisipatedinthematerialsduringmechanicalvibrationundercyclicloading.Th...Zhang, Zhongming Wang, Jincheng Xu, Donghui Lu, Yili Yang, Gencang Zhou, Yaohe 1999Journal of Rare Earths1999,17,2:3
13Algorithms for network-based identification of differential regulators from transcriptome data: a systematic evaluation显示文摘Identification of differential regulators is critical to understand the dynamics of cellular systems and molecular mechanisms of diseases.Several computational algorithms have recently been developed for this purpose by using transcriptome and network data.However,it remains largely unclear which algorithm performs better under a specific condition.Such knowledge is important for both appropriate application and future enhancement of these algorithms.Here,we systematically evaluated seven main algorithms(TED,TDD,TFactS,RIF1,RIF2,dCSA_t2t,and dCSA_r2t),using both simulated and real datasets.In our simulation evaluation,we artificially inactivated either a single regulator or multiple regulators and examined how well each algorithm detected known gold standard regulators.We found that all these algorithms could effectively discern signals arising from regulatory network differences,indicating the validity of our simulation schema.Among the seven tested algorithms,TED and TFactS were placed first and second when both discrimination accuracy and robustness against data variation were considered.When applied to two independent lung cancer datasets,both TED and TFactS replicated a substantial fraction of their respective differential regulators.Since TED and TFactS rely on two distinct features of transcriptome data,namely differential co-expression and differential expression,both may be applied as mutual references during practical application.YU Hui MITRA Ramkrishna YANG Jing LI YuanYuan ZHAO ZhongMing 2014Science China(Life Sciences)2014,57,11:2
14Larval and Juvenile Growth Performance of Manila Clam Hybrids of Two Full-Sib Families显示文摘In order to determine whether growth performance could be improved by hybridizing full-sib families of Manila clam(Ruditapes philippinarum), crosses between two full-sib families including self and reciprocal crosses were carried out. The effects of heterosis, combining ability and interaction on the growth of shell length were estimated. The results showed that the growth of hybrid larvae was intermediate between parents on days 6 and 9. Heterosis on shell length was observed, which varied at juvenile stage. The cross of ♂A×♀B(Hp varied between 10.41% and 68.27%) displayed larger heterosis than ♂B×♀A(Hp varied between 1.89% and 32.33%) did, suggesting that ♂A×♀B was an ideal hatchery method of improving the growth performance of Manila clam. The variances of general combining ability(GCA), special combining ability(SCA) and interaction(I) were significant in shell length(P < 0.05), indicating that both additive and non-additive genetic factors were important contributors to the growth of larvae and juveniles. The GCA for shell length of ♂A×♀B was higher than that of ♂B×♀A at both larval and juvenile stages. This confirmed that the cross between ♂A and ♀B showed great growth in shell length. In summary, the growth of Manila clam seeds could be improved by hybridizing selected parents from large numbers of full-sib families.HUO Zhongming YAN Xiwu ZHAO Liqiang LIANG Jian YANG Feng ZHANG Guofan 2015Journal of Ocean University of China2015,14,3:2
15Applications of multislice CT angiography in the surgical clipping and endovascular coiling of intracranial aneurysms显示文摘Prompt diagnosis and therapy of aneurysms are critical for patients with nontraumatic subarachnoid hemorrhage (SAH).The aim of our study was to assess the clinical usefulness of multislice computed tomography angiography (CTA) in the surgical and endovascular treatment of intracranial aneurysms.A total of 195 cases with 206 intracranial aneurysms underwent CTA.Fifty (24%) aneurysms underwent surgical clipping while 156 (76%) aneurysms underwent endovascular coiling.In the five missed aneurysms at digital substraction angiography and the nine aneurysms with mass intracerebral hematomas,surgical treatment was successfully performed based on 16-slice CTA alone,and the other 36 aneurysms were clipped on the main basis of the CTA.The intraoperative findings correlated well with the CTA findings and all aneurysms were clipped successfully.Sixteen-slice CTA image information has been shown to determine the choice of aneurysm therapy and assist the surgical and endovascular treatment of intracranial aneurysms.Wenhua Chen Yilin Yang Wei Xing Ya Peng Jianguo Qiu Zhongming He Qi Wang 2010The Journal of Biomedical Research2010,24,6:2
16Effect of Substrate Component on the Growth and Survival of Juvenile Sunray Surf Clam(Mactra chinensis Philippi)显示文摘Substrate is a critical environmental factor affecting the activity of bivalves. To examine the effect of the substrate component on the growth and survival of juvenile sunray surf clam(Mactra chinensis Philippi), a series of short-term experiments were conducted using a variety of substrates with different ratios of sand to mud. The experimental group cultured without substrate showed poor survival, with all juveniles died after day 20. The juveniles cultured in mud without sand showed a lower survival rate(25.54% ± 0.40% on day 45) than those in other groups. The juveniles cultured in sand without mud, or the mixtures of sand and mud with a ratio of 1:1 and 2:1, respectively, exhibited modest survival at day 45. Maximal weight gain rate(WGR), shell length growth rate(LGR), and specific growth rate(SGR) were observed when the sand concentration was 61.97%, 77.69%, and 64.64%, respectively. As the fast growth and high survival were observed when the sand to mud ratio was 1:1(50% sand) and 2:1(67% sand), a sand concentration of more than 50% is optimal. The optimal concentration of sand in the substrate for rearing juvenile sunray surf clams was 67% which resulted in the fastest growth and highest survival. These results can be used to developing a nursery/farming technique of improving the yield of sunray surf clams.ZHANG Xuekai LI Zhuang HUO Zhongming YAN Xiwu YANG Feng LIU Hui ZHANG Xingzhi 2016Journal of Ocean University of China2016,15,4:2
17Polarization-sensitive and wide-spectrum photovoltaic detector based on quasi-1D ZrGeTe_(4)nanoribbon显示文摘Low-dimensional semiconductors with in-plane anisotropy and narrow bandgap have been extensively applied to polarized detection in the near-infrared(NIR)region.However,the narrow bandgap can cause noise owing to the high dark current in photodetectors.This article reports quasi-1D ZrGeTe_(4)nanoribbonbased photodetectors with low dark current and broadband polarization detection.The photodetector was fabricated by evaporating 50-nm-thick Au electrodes on a ZrGeTe_(4)nanoribbon.Benefiting from the photovoltaic characteristics in the ZrGeTe_(4)nanoribbon and Au electrodes,these photodetectors can operate without bias voltage,with decreased dark current,and improved device performance.Furthermore,the quasi-1D ZrGeTe_(4)nanoribbon-based photodetectors demonstrate a polarization sensitivity in a broadband from visible(VIS)to the NIR region,such as a high photoresponsivity of 625.65 mA W1,large external quantum efficiency of 145.9%at 532 nm,and photocurrent anisotropy ratio of 2.04 at 1064 nm.They exhibit a novel perpendicular optical reversal of 90in polarization-sensitive photodetection,angle-resolved absorption spectra,and azimuth-dependent reflectance difference microscopy(ADRDM)from VIS to the NIR region,as opposed to other nanoribbon-based polarization-sensitive photodetectors.This work paves the way for utilizing photovoltaic photodetectors based on low-dimensional materials for broad-spectrum polarized photodetection.Ruixue Bai Tao Xiong Jinshu Zhou Yue-Yang Liu Wanfu Shen Chunguang Hu Faguang Yan Kaiyou Wang Dahai Wei Jingbo Li Juehan Yang Zhongming Wei 2022InfoMat2022,4,3:2
18Inbreeding Depression on Growth and Survival of Full-Sib Family of Manila Clam(Ruditapes philippinarum)显示文摘In present study, the inbreeding depression(ID) of growth and survival of Manila clam(Ruditapes philippinarum) was investigated at larval and juvenile stages. Nine inbred families(A_2, B_2, C_2, D_2, E_2, F_2, G_2, H_2 and I_2) were established by mating within nine full-sib families with expected inbreeding coefficient of 0.25. Inbred families showed significant differences in shell length and hatching rate of D-larvae(straight-hinged larvae). The larvae of the nine inbred families grew slower than those of control group(CG), and their ID value ranged from 0.81% ± 6.09% to 16.10% ± 1.49%. The ID value of larval survival rate varied between 27.47% ± 9.36% and 70.50% ± 13.66%. The ID was also detected for juvenile growth in A_2, B_2, C_2, and D_2, which ranged from 4.60 ± 2.21 to 17.71 ± 7.73. The A_2 family maintained the highest juvenile survival rate, whereas the other inbred families exhibited ID values varying between 62.79% ± 4.54% and 96.14% ± 0.87%. The linear relationship of estimated ID between growth and survival was negatively correlated(R =-0.434, P < 0.05). The results of this study suggested that the ID of growth was common at the larval stage but was less prevalent at juvenile stage. In contrast, the ID of survival increased from larval to juvenile stage. A better understanding of the effect of inbreeding may aid to selective breeding of Manila clam.HUO Zhongming LI Na ZHANG Xuekai LI Ying YAN Xiwu YANG Feng 2017Journal of Ocean University of China2017,16,1:2
19In situ Assemblies of Bacteria and Nutrient Dynamics in Response to an Ecosystem Engineer,Marine Clam Scapharca subcrenata,in the Sediment of an Aquaculture Bioremediation System显示文摘The relationships between nutrient dynamics,microbial community,and macrofauna are important in bioremediation systems.In this study,we examined the effects of marine clam Scapharca subcrenata sedimentary activities on the microbial assemblages,benthic nutrient chemistry,and its subsequent remediation impacts on organic effluent in the sediment of an aquaculture wastewater bioremediation system.The results showed that microbial community composition differed significantly in the clam area(ANOSIM,R=0.707,P=0.037).Pyrosequencing of bacterial 16S rRNA gene revealed a total of 48 unique phyla,79 classes,107 orders,197 families,and 321 genera amongst all samples.The most dominant bacterial assemblages were Proteobacteria,Bacteroidetes,Acidobacteria,Firmicutes,Verrucomicrobia,and Actinobacteria,with Bacteroidetes and Firmicutes significantly higher in all treatment samples than control(P<0.001).All dominant phyla in the list were shared across all samples and accounted for 89%(control)and 97%(treatment)of the total 16S rRNA.The nutrient flux rates from the sediments into the water(treatment group)were 51%(ammonium),88%(nitrate),77%(nitrite)and 45%(phosphate)higher,relative to the control implying increased mineralization,degradability,and mobility of the benthic nutrients.Similarly,significantly increased oxygen consumption rates were evident in the clam area signifying improved oxygen distribution within the sediment.The organic effluent contents associated with total-organic matter,carbon,nitrogen,and,phosphate were lower among the clam treatments relative to the control.Our results describe the potential roles and mechanisms contributed by marine bivalve S.subcrenata on benthic-bacterial-community assembly,nutrient balance,and effluent reduction in the sediments of aquaculture wastewaters bioremediation system.NICHOLAUS Regan LUKWAMBE Betina YANG Wen ZHU Jinyong ZHENG Zhongming 2020Journal of Ocean University of China2020,19,6:2
20The role of the surface microstructure of the microfibrils in an electrically conductive microfibrillar carbon black/poly (ethylene terephthalate) /polyethylene composite 显示文摘XU Xiangbin LI Zhongming YANG Mingbo 2005Carbon2005,43,7:1
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