Lang Trang Cave (Northern Vietnam): Pleistocene Mammalian Locality with Gigantopithecus Finds     

Lopatin  A. V.  Golovachev  I. V.  Serdyuk  N. V.  Maschenko  E. N.  Vislobokova  I. A.  Dac  Le Xuan  Phuong  Pham Mai  Parkhaev  P. Yu.  Syromyatnikova  E. V. 《Doklady Earth Sciences》2022,504(2):372-379

Doklady Earth Sciences - Speleological, geological and paleontological characteristics of the Lang Trang cave in northern Vietnam are presented. Primates Gigantopithecus blacki von Koenigswald,...  相似文献   

3个登陆台风引发阳江特大暴雨的水汽输送对比分析   总被引：1，自引：0，他引：1  

黄小丹  黄先伦  麦宗天 《气象与环境科学》2015,38(3):61-69

利用区域自动站资料及NCEP再分析资料,对0915号"巨爵"、1006号"狮子山"和1011号"凡亚比"登陆后引发阳江特大暴雨的水汽输送特征进行了对比分析,并应用HYSPLIT-4轨迹模式验证了水汽来源。结果表明:1)它们引发阳江特大暴雨期间,低纬西南季风活跃。"巨爵"影响时由来自印度洋与副高西侧偏南气流汇合产生强降雨,水汽来源于中南半岛和孟加拉湾;"狮子山"影响时西南水汽输入明显减弱,主要由偏东气流携南海近海水汽的注入引发了局地短而强的降雨,水汽来源于南海近海;"凡亚比"登陆后,北部湾超低空急流的暴发,有利于强西南气流携带水汽经粤西往"凡亚比"输送,引发粤西地区特大暴雨,水汽主要来源于北部湾。2)强降雨都是始于阳江特大暴雨区纬向风转东风或经向风转南风阶段。"巨爵"、"凡亚比"引发阳江强降雨前后,850 h Pa南海、北部湾经向风南风明显增大,加强了海上水汽的向北输送。"狮子山"影响时则是由于近海短时间转东风,水汽由东输入并加强了辐合。3)水汽输送以"巨爵"最强、"狮子山"最弱,水汽辐合层次"巨爵"和"狮子山"较"凡亚比"要浅薄。它们的低层水汽辐合中心与特大暴雨区有很好的对应关系。  相似文献   

Effects of waterborne Cu and Cd on anti-oxidative response,lipid peroxidation and heavy metals accumulation in abalone Haliotis discus hannai ino     

Lei  Yanju  Zhang  Wenbing  Xu  Wei  Zhang  Yanjiao  Zhou  Huihui  Mai  Kangsen 《中国海洋大学学报(英文版)》2015,14(3):511-521

The aim of this study was to compare the effects of waterborne copper(Cu) and cadmium(Cd) on survival, anti-oxidative response, lipid peroxidation and metal accumulation in abalone Haliotis discus hannai. Experimental animals(initial weight: 7.49 g ± 0.01 g) were exposed to graded concentrations of waterborne Cu(0.02, 0.04, 0.06, 0.08 mg L-1) or Cd(0.025, 0.05, 0.25, 0.5mg L-1) for 28 days, respectively. Activities of the anti-oxidative enzymes(catalase, CAT; superoxide dismutase, SOD; glutathione peroxidases, GPx; glutathione S-transferase, GST), contents of the reduced glutathione(GSH) and malondiadehyde(MDA) in the hepatopancreas, and metal accumulation in hepatopancreas and muscles were analyzed after 0, 1, 3, 6, 10, 15, 21, 28 days of metal exposure, respectively. Results showed that 0.04 mg L-1, 0.06 mg L-1 and 0.08 mg L-1 Cu caused 100% death of abalone on the 21 st, 10 th and 6th day, respectively. However, no dead abalone was found during the 28-day waterborne Cd exposure at all experimental concentrations. Generally, activities of SOD and GST in hepatopancreas under all Cu concentrations followed a decrease trend as the exposure time prolonged. However, these activities were firstly increased and then decreased to the control level and increased again during Cd exposure. Activities of CAT in all Cu exposure treatments were higher than those in the control. These activities were firstly increased and then decreased to the control level and increased again during Cd exposure. Contents of MDA in hepatopancreas in all Cu treatments significantly increased first and then decreased to the control level. However, the MDA contents in hepatopancreas were not significantly changed during the 28-day Cd exposure. The metals accumulation in both hepatopancreas and muscles of abalone significantly increased with the increase of waterborne metals concentration and exposure time. These results indicated that H. discus hannai has a positive anti-oxidative defense against Cu or Cd. In conclusion, anti-oxidative mechanism in abalone to resist waterborne Cu did not follow the same pattern as that for waterborne Cd.  相似文献   

Proline with or without hydroxyproline influences collagen concentration and regulates prolyl 4-hydroxylase α (I) gene expression in juvenile turbo (Scophthalmus maximus L.)     

Zhang  Kaikai  Mai  Kangsen  Xu  Wei  Zhou  Huihui  Liufu  Zhiguo  Zhang  Yanjiao  Peng  Mo  Ai  Qinghui 《中国海洋大学学报(英文版)》2015,14(3):541-548

Journal of Ocean University of China - This study was conducted to investigate the effect of dietary proline (Pro), and Pro and hydroxyproline (Hyp) in combination on the growth performance, total...  相似文献   

Influence of dietary probiotic Bacillus TC22 and Prebiotic fructooligosaccharide on growth, immune responses and disease resistance against Vibrio splendidus infection in sea cucumber Apostichopus japonicus     

Yancui Zhao  Kangsen Mai  Wei Xu  Wenbing Zhang  Qinghui Ai  Yanjiao Zhang  Xiaojie Wang  Zhiguo Liufu 《中国海洋大学学报(英文版)》2011,10(3):293-300

The effects of probiotic Bacillus TC22 (isolated from intestine of infected sea cucumber) and prebiotic fructooligosaccharide (FOS) on growth, immunity and disease resistance in sea cucumber Apostichopus japonicus were studied. Six experimental diets were formulated with combinations of three levels of TC22 (0, 107 and 109 CFU g-1 diet) and two levels of FOS (0 and 0.5%) in a 3 × 2 factorial experiment. At the end of the 8-week feeding trial,animals were challenged by injecting Vibrio splendidus. The results revealed that the specific growth rates (SGR) of sea cucumbers were not affected by TC22 and FOS, or the interaction between TC22 and FOS (P > 0.05). However,there were significant interactions between TC22 and FOS for immune response and disease resistance in sea cucumbers (P < 0.05). When sea cucumbers were fed with TC22 at 109 CFU g?1 feed and 0.5% FOS alone or in combination, the phagocytosis, respiratory burst and phenoloxidase activity of sea cucumber coelomocytes were significantly enhanced;the disease resistance against V. splendidus infection was also increased significantly (P < 0.05).However, dietary combination of TC22 at 109 CFU g-1 diet and 0.5% FOS did not yield significantly higher efficiency than either TC22 at 109 CFU g-1 diet or 0.5% FOS used alone (P > 0.05). Therefore, further studies should examine the effects of combinations of other levels of FOS(> 0.5% or < 0.5%) and TC22 on the immunity and disease resistance of sea cucumbers.  相似文献   

Bayesian inference of kinematic earthquake rupture parameters through fitting of strong motion data     

D. Monelli  P. M. Mai 《Geophysical Journal International》2008,173(1):220-232

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Occurrence of persistent organic pollutants in marine fish from the Natuna Island,South China Sea     

Qing Hao  Yu-Xin Sun  Xiang-Rong Xu  Zi-Wei Yao  You-Shao Wang  Zai-Wang Zhang  Xiao-Jun Luo  Bi-Xian Mai 《Marine pollution bulletin》2014

Five marine fish species were collected from the Natuna Island, South China Sea to investigate the occurrence of polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs). Concentrations of PBDEs, PCBs, and DDTs in marine fish ranged from 2.85 to 7.82, 14.3 to 48.1, and 7.99 to 40.3 ng/g lipid weight, respectively. Higher concentrations of PBDEs, PCBs, and DDTs were observed in Snakefish (Trachinocephalus myops), which might be attributed to their different feeding and living habits. PCBs were the predominant POPs in all marine fish, followed by DDTs and PBDEs. BDE 47 and PCB 153 were the predominant congener of PBDEs and PCBs, respectively. Compositional distribution of DDTs indicated the possible presence of fresh input sources around the Natuna Island. The ratios of o,p′-DDT/p,p′-DDT being less than 1 in fish samples suggested that DDT contributions from dicofol seemed considerably low. New input sources of DDT in South China Sea are worth further research.  相似文献   

Effects of dietary β-glucan and glycyrrhizin on non-specific immunity and disease resistance of the sea cucumber (<Emphasis Type="Italic">Apostichopus japonicus</Emphasis> Selenka) challenged with <Emphasis Type="Italic">Vibrio splendidus</Emphasis>     

Jie Chang  Wenbing Zhang  Kangsen Mai  Hongming Ma  Wei Xu 《中国海洋大学学报(英文版)》2010,9(4):389-394

Sea cucumbers, Apostichopus japonicus Selenka, were fed diets containing non-immunostimulant (basal diet), 0.2% β-glucan and 0.02% glycyrrhizin in a recirculatory water system for 45 days, and subsequently challenged with Vibrio splendidus by injection at 1.0×10⁸ cfu / sea cucumber for 15 days. Phagocytic capacity (PC), intracellular superoxide anion production (ISAP), lysozyme (LSZ) activity and superoxide dismutase (SOD) activity in the coelomic fluid were analyzed on the 0^th, 5^th, 10^th and 15^th days after injection. Results showed that after the 45-day feeding period, PC, ISAP, LSZ activity and SOD activity in sea cucumbers fed with dietary β-glucan or glycyrrhizin were significantly higher than in those fed with the basal diet. On the 5th day after infection, all the immune parameters examined in the sea cucumbers injected with V. splendidus decreased in value significantly. On the 15^th day, PC, ISAP and LSZ activity returned to levels similar to those on the 0^th day. For the sea cucumbers injected with saline, there were no significant differences in all the immune parameters examined and in the cumulative morbidity during the 15-day challenging trial. After injecting with V. splendidus, the cumulative morbidity of sea cucumbers fed with the basal diet was significantly higher than those fed with dietary β-glucan or glycyrrhizin when challenged with V. splendidus challenged sea cucumber fed with the basal diet was significantly higher than those fed with dietary β-glucan or glycyrrhizin. There was no significant difference in cumulative morbidity between the dietary β-glucan and glycyrrhizin treatments over time.  相似文献   

Enhancement of Seismic Data Processing and Interpretation of Fracture Zones on the Upper Part of Granitic Basement in Cuu Long Basin,Vietnam     

Mai Thanh Tan  Mai Thanh Ha  Kurt J. Marfurt  Nguyen Trung Hieu  Nguyen Thi My Hanh 《Acta Geophysica》2016,64(6):2214-2231

The fractured granite basement is the primary oil and gas reservoir in the Cuu Long Basin, Vietnam. Due to the complexity of this nonlayered unconventional target, combined with complicated fault and fracture systems, the seismic data quality near and within the basement section is very low. For this reason, it is important to apply improved seismic data processing workflows, filtering and migration techniques, as wells as attribute processing methods to enhance the imaging quality.Our studies show that applying different types of filters, including the f-k, Radon transform and Tau-P, improves signal to noise ratio, removing multiples, revealing basement’s top and its related fractured and fault zones. In addition, the application of multi-arrival-solution migration algorithms, such as Kirchhoff Migration and Controlled Beam Migration, provides improved imaging for identifying basement top and faults and fractures within the basement. Furthermore, the application of seismic attributes such as curvature, apparent dip, or energy gradient, is important in locating faults and fractures, whereas mapping of intensity and orientation of such structures assists the delineation of “sweet spots” and assists the planning of exploration.  相似文献   

Growth and feed efficiency of juvenile shrimp Litopenaeus vannamei fed formulated diets containing different levels of poultry by-product meal   总被引：1，自引：0，他引：1  

Shuyan Chi  Beiping Tan  Kangsen Mai  Shixuan Zheng 《中国海洋大学学报(英文版)》2009,8(4):399-403

This feeding trial was conducted to evaluate the potential of poultry by-product meal (PBM) as a protein source in the culture ofLitopenaeus vannamei. Seven isonitrogenous and isoenergetic diets were formulated to near to commercial diet with about 40% protein and 7.5% lipid. Fish meal was replaced by 0, 30%, 40%, 50%, 60%, 70% and 100% of PBM (diets 1-7). The diet with 100% fish meal was used as a control (diet 1). Post-larvae were reared in an indoor semi-closed re-circulating system. Each dietary treatment was tested in 4 replicate tanks (260 L) of 40 shrimp, arranged in a completely randomized design. The shrimps were hand-fed for three times a day to near-satiation (0700, 1200 and 1800) for 60d. Percentage weight gain, survival, feed conversion ratio (FCR), protein efficiency ratio (PER) and body composition of shrimps were measured. There were no significant differences (P>0.05) in growth performance among shrimps fed diets 1-5 (0-60% fish meal replacement). However, shrimps fed diet 7 (100% fish meal replacement) had significantly lower (P<0.05) growth than those fed diets 1-5 (0-60% fish meal replacement). Shrimp fed diets 2-4 (30%-50% fish meal replacement) showed significantly higher growth than those fed diets 6 and 7 (70% and 100% fish meal replacement, respectively). Survival ranged from 94.7% to 100.0% and did not differ significantly (P>0.05) among different experimental diets. No differences in body composition were found among shrimps fed different diets. These results showed that up to 70% of fish meal protein can be replaced by PBM without adversely affecting the growth, survival, FCR, PER and body composition of Litopenaeus vannamei.  相似文献