Triterpene-Enriched Olive Extract as an Immunopotentiator in Black Sea Bream ( Acanthopagrus schlegelii)     

Jiahuan Rong  Yu Han  Shanjie Zha  Yu Tang  Wei Shi  Xiaofan Guan  Xueying Du  Maolong He  Guangxu Liu 《中国海洋大学学报(英文版)》2020,19(2):428-438

Recently,the use of natural immunopotentiators,such as plant extracts,is predicted to offer high disease-prevention potential in aquaculture.However,few reports on the immunomodulatory impacts of olive extract(OE)on teleost are available.Therefore,the effects of dietary intake of triterpene-enriched OE on black sea bream(Acanthopagrus schlegelii)were investigated in this study.Our data showed that total blood cell counts,in vivo content of lysozyme,activities of antiprotease and myeloperoxidase,and contents of IL-4 and IL-6 were significantly up-regulated by dietary intake of triterpene-enriched OE.Additionally,the hampered immune response induced by cadmium exposure was significantly mitigated by the administration of OE as were indicated by partially or completely rescued immune-relating parameters.Furthermore,the expressions of immune-related genes encoding NF-κB inhibitor alpha(IkBα),tumor necrosis factorα(TNFα),cyclooxygenase-2(COX-2),and proto-oncogene protein c-fos(FOS)were found to be significantly up-regulated by the dietary intake of OE.In general,the results suggested that the dietary intake of triterpene-enriched OE has immune enhancing effect in black sea bream.Such effect may be realized by 1)increasing the total counts of diverse blood cells;2)activating nonspecific immune biomolecules;and 3)affecting signaling pathways such as IKK and ERK and subsequently inducing IL-4 and IL-6 biosyntheses.  相似文献   

Empirical calibration of the clinopyroxene–garnet magnesium isotope geothermometer and implications     

Wang-Ye Li  Fang-Zhen Teng  Yilin Xiao  Hai-Ou Gu  Xiang-Ping Zha  Jian Huang 《Contributions to Mineralogy and Petrology》2016,171(7):61

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Surface dynamic subsidence prediction model of solid backfill mining     

Xiaojun Zhu  Guangli Guo  Jianfeng Zha  Tao Chen  Qi Fang  Xiaoyu Yang 《Environmental Earth Sciences》2016,75(12):1007

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Holocene palaeoflood events recorded by slackwater deposits along the middle Beiluohe River valley,middle Yellow River basin,China          下载免费PDF全文

Yuzhu Zhang  Chun Chang Huang  Jiangli Pang  Xiaochun Zha  Yali Zhou  Xiaqing Wang 《Boreas: An International Journal of Quaternary Research》2015,44(1):127-138

Palaeohydrological investigations were carried out in the middle Beiluohe River valley in the middle Yellow River basin. Palaeoflood slackwater deposits (SWDs) are natural records of overbank flooding and are often identified in the Holocene aeolian loess–soil profiles along the river valley. Three bedsets of palaeoflood SWDs were found within the mid‐Holocene Climatic Optimum palaeosol (S₀) on the right riverbank. Both the sedimentary and the analytical results, including magnetic susceptibility, grain‐size distribution and concentrations of chemical elements, indicate that these palaeoflood SWDs were deposited from the suspended sediment load of overbank flooding. We identified three episodes of extraordinary overbank flooding events. These hydro‐climatic events were dated to 7600–7400, 5800–5000 and 4200–4000 a BP, from optically stimulated luminescence (OSL) dating and pedostratigraphical correlation. The minimum flood peak discharges were estimated to have been between 12 600 and 14 100 m³ s^?1 using the slope–area method. These hydro‐climatic events are considered to be a regional expression of known climatic events and demonstrate that the mid‐Holocene climate was far from stable. These results show that the magnitudes of floods are highly sensitive to climate change in semi‐arid and sub‐humid regions with a monsoonal climate.  相似文献   

On paleodrainage evolution in mid-late Epipleistocene based on radar remote sensing in northeastern Ejin Banner,Inner Mongolia   总被引：2，自引：0，他引：2  

WANGXinyuan GUOHuadong CHANGYueming ZHALiangsong 《地理学报(英文版)》2004,14(2):235-241

Radar remote sensing can acquire information of sub-surface covered by sand in arid area,detect surface roughness and vegetation coronet‘s layer and linear feature such as linear structure and channel sensitively. With sediment facies analysis, this paper studies the features of environmental evolution in mid-late Epipleistocene (60 ka BP-20 ka BP) in northeastem Ejin Banner. The conclusions are listed as follows: (1) The evolution of the three lakes, i.e. Gaxunnur, Sugunur and Tian‘e lakes, are dominated by faults and regional climate. (2) By analyzing sedimentary section of old Juyanze Lake,the three lakes used to be a large outflow lake before 50 ka BP in northeastem Ejin Banner, and at 50 ka BP, temperature declined rapidly in northwestem China. The event caused the lake‘s shrinkage. (3)By fault activity uplift in the northem part of old Juyan Lake and depression in the southem part, the lake‘s water followed fi‘om north to south at around 35 ka BP, old Juyanze fluvial fan was formed. At the same time, Juyan lake separated fi‘om Sugunur Lake and Wentugunr old channel was abandoned.(4) In recent 2000 years, Ruoshui River is a wandering river, sometimes it flows into Juyan lake and sometimes Sugunur and Gaxunnur lakes. Due to human activities and over exploitation, the oasis ecosystem is rapidly degenerated in 15 years (1986-2000).  相似文献   

黄上丘陵林地土壤侵蚀与土壤性质变化     

查小春  唐克丽 《地理学报(英文版)》2003,13(3):373-378

The serious soil erosion caused the fragile eco-environment in the Loess Plateau. In modern soil erosion of the Loess Plateau, the man-made accelerated erosion was the dominant erosion pattern (Tang etal., 1993a; 1993b). There are many kinds of human activities to accelerate erosion, of which the most influential activities are to destroy forest and grass, even to destroy vegetation. Reclamation at the expense of destruction of forestland and grassland artificially could increase soil erosio…  相似文献   

Application of a Degree-Day Model for Determination of Mass Balance of Urumqi Glacier No. 1, Eastern Tianshan, China     

吴利华  李慧林  王林 《中国地质大学学报(英文版)》2011,(4)

In order to verify the feasibility and stability of a degree-day model on simulating the long time series of glacier mass balance, we apply a degree-day model to simulate the mass balance of Urumqi Glacier No. 1 for the period 1987/1988-2007/2008 based on temperature and precipitation data from a nearby climate station. The model is calibrated by simulating point measurements of mass bal-ance, mass balance profiles, and mean specific mass balance during 1987/1988-1996/1997. The opti-mized parameters are obt...  相似文献   

Zr-in-rutile thermometry of eclogite in the Dabie orogen: Constraints on rutile growth during continental subduction-zone metamorphism     

Yong-Fei Zheng  Xiao-Ying Gao  Ren-Xu Chen  Tianshan Gao 《Journal of Asian Earth Sciences》2011,40(2):427-451

The Zr content of rutile was analysed by both EMP and LA-ICPMS for low-T/UHP eclogite and enclosed kyanite–quartz veins in the Dabie orogen, China. Zr-in-rutile temperatures were calculated at different pressures and then compared with temperatures derived from Ti-in-zircon, mineral-reaction, quartz–mineral O-isotope and garnet–clinopyroxene Fe–Mg exchange thermometers. All thermometric data are interpreted within the framework of petrologically and geochronologically constrained P–T–t path. As a consequence, variable Zr-in-rutile temperatures for different occurrences of rutiles are used to indicate their growth in different stages during continental subduction-zone metamorphism. Thus, some rutiles would grow at the peak pressure, whereas other rutiles would either grow before the peak pressure during the subduction or grow at or after the peak temperature during exhumation. The mineral O-isotope and Fe–Mg exchange thermometers also yield variably lower temperatures for the eclogite. The similar results were obtained for mid-T/UHP eclogites in the Dabie-Sulu orogenic belt. This is ascribed to the characteristic P–T–t path of UHP metamorphic rocks, in which metamorphic temperatures at peak pressures are lower than the peak temperatures at decreased pressures during exhumation. Thus, there is a contest between thermodynamics and kinetics during metamorphic reactions in response to P–T changes. Therefore, the reasonable interpretation of thermometric data requires comprehensive understanding of thermometric methodology from physicochemical principles to geological applicabilities.  相似文献   

ECO-ENVIRONMENT CHANGE AND SOIL EROSION PROCESS IN THE RECLAIMED FORESTLAND OF THE LOESS PLATEAU     

ZHA Xiao-chun  TANG Ke-li 《中国地理科学(英文版)》2003,13(3):232-237

1INTRODUCTIONSerioussoilerosionhasmadetheeco-environmentfragileintheLoessPlateau.InthemodernsoilerosionoftheLoessPlateau,theman-madeerosionwasthedominanterosionpattern (TANGetal.,1993a,1993b).Manyhumanactivitiesacceleratesoilerosion,butthemostinfluentialactivitiesaretodestroyforestandgrass,eventodestroyallvegetation.Reclamationbydestroyingforestlandandgrasslandartificiallycouldrapidlyincreasesoilerosionintensityinshorttimeandenlargeerosionspacegradually,evenchangeerosiondirectionandwor…  相似文献   

柴北缘西端冷湖盐场北山辉长岩地球化学及年代学研究   总被引：2，自引：0，他引：2       下载免费PDF全文

董增产  辜平阳  焦和  查显锋  陈锐明  张海迪 《地质科学》2014,49(4):1132-1149

柴北缘冷湖盐场北山镍铜矿区发育辉长岩和角闪辉长岩;属亚碱性岩石系列。球粒陨石、 原始地幔标准化曲线呈两组特征;但配分型式基本一致;反映其来自同一源区。稀土标准化曲线表现为弱右倾型;Eu基本无异常;说明斜长石分离结晶作用不明显。Rb、 Nb、 Zr、Cr等微量元素丰度及比值具有近似平行部分熔融的演化趋势。结合岩体Mg^#值和岩体固结指数（SI）高等特点;揭示原始岩浆具有幔源原生玄武岩浆特征;认为其成因与俯冲板片流体交代地幔楔源区的部分熔融有关;而且;Nb、 Zr、 Y元素丰度表明辉长岩源区为过渡型地幔。另外;两类岩体强烈亏损Nb、 Ta、 Zr、 Hf、 Ti等高场强元素（HFSE）;富集Ba、 Th、 U、 Pb等大离子亲石元素;反映明显的消减带和岛弧环境岩浆岩典型特征。LA-ICPMS锆石U-Pb测年结果表明辉长岩形成于254±3 Ma;结合该时期区域地质构造背景;认为柴北缘晚二叠世处于俯冲作用之下的岛弧构造环境;具有活动大陆边缘性质。  相似文献