检索结果-南通市图书馆

Effect of Dopamine Injection on the Hemocyte Count and Prophenoloxidase System of the White Shrimp Litopenaeus vannamei

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2011年第3期10卷 280-286页

作者： AN Luqing hu fawen ZHENG Debin Department of Aquaculture the Key Laboratory of Mariculture Ministry of Education Ocean University of China Qingdao 266003 P. R. China

Effects of dopamine injection on the hemocyte count, phenoloxidase activity, serine proteinase activity, proteinase in-hibitor activity and α2-macroglobulin-like activity in L. vannamei were studied. Results showed that dopamine injection resulted in a significant effect on the parameters measured (P < 0.05), while no significant difference was observed in the control group (0.85% NaCl). In the experimental groups,the hemocyte count reached the minimum in 3 h;granular and semi-granular cells became stable after 12 h and hyaline cells and the total hemocyte count became stable after 18 h. Phenoloxidase activity reached the minimum in 6 h, and then became stable after 9 h. Serine protease activity and proteinase inhibitor activity reached the minimum in 3 h, and α2-macro-globulin-like activity reached the maximum in 3 h,and all the three parameters became stable after 12 h. The results suggest that the activating mechanisms of the proPO system triggered by dopamine are different from those triggered by invasive agents or sponta-neously activated under a normal physical condition.

关键词： Litopenaeus vannamei dopamine injection hemocyte count prophenoloxidase system

Effects of Hypoxia on Dopamine Concentration and the Immune Response of White Shrimp (Litopenaeus vannamei)

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2009年第1期8卷 77-82页

作者： hu fawen PAN Luqing JING Futao The Key Laboratory of Mariculture Ministry of Education Ocean University of China Qingdao 266003 P.R. China

Effects of hypoxia on the dopamme concentration and the immune response of White Shrimp Litopenaeus vannamei were studied. The results showed that hypoxia had significant effects on the concentration of dopamme （DA） in the haemolymph, haemocyte count, phenoloxidase activity, phagocytic activity of haemocytes and bacteriolytic and antibacterial activity in the haemolymph （P〈0.05）. The concentration of the dopamme in haemolymph reached its maximum in the 3.0 and 1.5 mgL^-1 DO groups at 12hand 6h, and then returned to normal after 24h and 12h, respectively. All munune parameters decreased with the reduction of dissolved oxygen. Total haemocyte count （THC）, the hyaline cells and semi-granular cells in the 3.0mgL^-1 DO group became stable after 12h, while granular cells did so after 24h. The THC and different haemocyte count （DHC） in the 1.5mgL^6-1 DO group became stable after 24 h. Phenoloxidase activity and bacteriolytic activity in the 3.0 and 1.5 mgL^-1 DO groups reached their stable levels after 24 h and 12h respectively, while phagocytic activity and antibacterial activity＂ became stable after 24 and 12, and 36 and 24h, respectively. It was also indicated that the changes of dopamme concentrations in haemolymph, haemocyte count and phenoloxidase activity were obviously related to the exposure ttrne under hypoxic conditions.

关键词： hypoxia dopamine immune response Litopenaeus vannamei

Effects of Na^+/K^+ Ratio of Groundwaters on the Gill Ion-Transport Enzyme Activity,Plasma Osmolality and Growth of Cynoglossus semilaevis Juveniles

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2008年第4期7卷 447-452页

作者： YANG huizan PAN Luqing hu fawen LIU Hongyu The Key Laboratory of Mariculture Ministry of Education Ocean University of China Qingdao 266003 P. R. China

The effects of environmental Na+/K+ ratio on the gill ion-transport enzyme activity,plasma osmolality and growth of Cynoglossus semilaevis juveniles were investigated. The results showed that,plasma osmolality was similar among flounder adapted to different Na+/K+ ratios of saline groundwaters (P>0.05),while the growth,gill Na+,K+-ATPase and HCO3--ATPase activities were affected by Na+/K+ ratio significantly (P<0.05). The gill Na+,K+-ATPase activity reached its maximum on day 3,then decreased gradually from day 3 to day 9 and remained constant from day 9 to day 15. The peak values of gill Na+,K+-ATPase activity were detected on day 3 for all Na+/K+ ratios of saline groundwaters,then the enzyme activities descended,and on day 9 the enzyme activi-ties achieved steady state,and the gill HCO3--ATPase activity increased rapidly and achieved steady state after one day. During steady state,the gill Na+,K+-ATPase and HCO3--ATPase activity of Na+/K+ ratios 20 and 40 treatments were significantly higher than those in the control group (Na+/K+ ratio 27.5),while there were no significant differences between the Na+/K+ ratio 30 treatment and the control group; the gill Na+,K+-ATPase activity of Na+/K+ ratio 20 and 40 treatments were significantly higher than that for ratio 30 treatment,but there were no significant differences of gill HCO3--ATPase activity among these treatments. At the end of the 15-day experiment,the weight gain (%) and specific growth rate (SGR) of flounders maintained in seawater were significantly higher than those in groundwaters; significant differences also occurred among the treatments; Na+/K+ ratio 30 treatment had the highest values (33.7% and 1.94 respectively),which were significantly higher than those under Na+/K+ ratios 20 and 40 treatments. There-fore,for the saline groundwater used in this experiment,it is suggested that the Na+/K+ ratio be adjusted to approximately 30,i.e.,as close to that of natural seawater as possible in the culture of floun

关键词： Na^-/K^- ratio Cynoglossus semilaevi ion-transport enzyme activity plasma osmolality growth

Effects of Environmental Cadmium on Cadmium Accumulation, Oxidative Response, and Microelements Regulation in the Liver and Kidney of Hexagrammos otakii

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第2期21卷 479-485页

作者： hu fawen SUN Ming LI Li GAO Fengxiang JIAN Yuxia WANG Xue WANG Xiaolong GUO Wen Marine Biology Institute of Shandong Province Healthy Mariculture Engineering Research Center of Shandong ProvinceQingdao 266104China

The effects of cadmium(Cd)on metal accumulation,microelements contents,and antioxidant responses in Hexagram-mos otakii were *** fish were exposed to 0.2,2.5,or 10μg L−1 Cd for 12 or 24 ***,the concentration of Cd and mi-croelements(Ca,Fe,Zn,and Se)were determined in the liver and ***,the activities of antioxidant enzymes including superoxide dismutase(SOD),catalase(CAT),and glutathione-S-transferase(GST),and the content of malondialdehyde(MDA)in the liver and kidney were also measured.A continuous accumulation of Cd was observed throughout the experimental *** accumulation was higher in liver than that in the kidney,while Ca and Fe contents were lower in liver than those in the *** exposure resulted in a decrease of Ca and Fe concentrations in the kidney,while there was no effect on the *** and Se remained unaffected with exposure to *** exposure induced severe oxidative stress in ***,as indicated by significant induction of the activities of SOD,CAT,and GST,and a simultaneous increase of MDA *** data show that antioxidant enzymes and mi-croelements contents can be used as potential biomarkers to monitor environmental health in fish.

关键词： accumulation oxidative response ionoregulatory toxicity waterborne cadmium Hexagrammos otakii

Applicability of Perinereis aibuhitensis Grube for Fish Waste Removal from Fish Cages in Sanggou Bay,***

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2017年第2期16卷 294-304页

作者： FANG Jinghui JIANG Zengjie JANSEN Henrice M. hu fawen FANG Jianguang LIU Yi GAO Yaping DU Meirong Key Laboratory for Sustainable Utilization of Marine Fisheries Resources of Ministry of Agriculture Yellow Sea Fisheries Research InstituteQingdao 266071P.R.China Institute of Marine Research Bergen 5817Norway Institute for Marine Resources and Ecosystem Studies Yerseke 4400 ABthe Netherlands Marine Biology Institute of Shandong Province Qingdao 266100P.R.China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237P.R.China

The present study investigated the applicability of integrated polychaete-fish culture for fish waste removal to offset negative impact induced by organic benthic enrichment.A field study demonstrated that deposition rate was significantly higher underneath the fish farm than that in control *** material settling under the farm was characterized by a high amount of fish feces(45%) and uneaten feed(27%).Both feeding rate(FR) and apparent digestibility rate(ADR) increased with decreasing body weight,as was indicated by significantly a higher rate observed for the groups containing smaller individuals in a lab *** nutrient in fresh deposited material(De) was higher than that in sediments collected under the farm(Se),resulting in lower feces production but higher apparent digestibility rate for the De group as feeding rate was ***,higher nutrient removal efficiency was observed in the De group.A mass balance approach indicated that approximately 400–500 individuals m^(-2) is required for removing all waste materials deposited underneath the fish farm,whereas abundance can be lower(about 300–350 individuals m^(-2)) when only the fish waste needs to be *** results showed that a significant amount of waste had been accumulated in the fish cages in Sanggou *** integration of fish with *** seems promising for preventing organic pollution in the sediment and therefore is an effective strategy for mitigating negative effect of fish *** such integration can become a new IMTA(integrated multi-trophic aquaculture) model in Sanggou Bay.

关键词： polychaete fish cage farming IMTA carbon nitrogen environmental recovery

Carbon and nitrogen budget in fish-polychaete integrated aquaculture system

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2021年第3期39卷 1151-1159页

作者： fawen hu Ming SUN Jinghui FANG Guodong WANG Li LI Fengxiang GAO Yuxia JIAN Xue WANG Guangbin LIU Yan ZOU Wen GUO Marine Biology Institute of Shandong Province Qingdao 266104China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266071China Marine Science and Engineering College Qingdao Agricultural UniversityQingdao 266109China

Integrated multi-tropic aquaculture(IMTA)systems have been used in China for many years and have achieved significant economic,social,and ecological ***,there is still a lack of benthic bioremediation species that can effectively utilize the aquaculture particulate organic waste in the *** Perinereis aibuhitensis Grube is used as an environmental remediation species for large-scale aquaculture to reduce particulate organic waste,which is of great significance to environmental *** improve bio-elements utilization efficiency,*** was applied for IMTA indoor fish(Hexagrammos otakii)*** showed that in the system,production of 1 kg of the fish discharged 2141-2338 mg of carbon and 529-532 mg of nitrogen,while in the monoculture of the fish,the figures were 3033-3390 mg and 764-794 mg,or 24.84%-35.26%and 30.35%-33.32%less,*** approach promoted IMTA technology that could utilize the particulate organic waste from intensive aquaculture and reduce the adverse environmental effects.

关键词： Perinereis aibuhitensis Grube Hexagrammos otakii integrated multi-tropic aquaculture(IMTA) carbon and nitrogen budget sediment remediation

在线全文

学校读者我要写书评

暂无评论

民族文化认同:内涵与结构

上海师范大学学报（哲学社会科学版） 2011年第1期40卷 101-107页

作者：王沛胡发稳上海师范大学教育学院上海200234 红河学院教师教育学院云南蒙自661100

民族文化认同是个体获得、保持与创新自身民族文化的社会心理过程,是文化变迁和融合中的必然现象。在考察民族文化认同相关研究的基础上,结合心理测量和社会认知理论,探讨民族文化认同的内在属性、基本内容与结构,旨在为民族文化认同的... 详细信息

民族文化认同是个体获得、保持与创新自身民族文化的社会心理过程,是文化变迁和融合中的必然现象。在考察民族文化认同相关研究的基础上,结合心理测量和社会认知理论,探讨民族文化认同的内在属性、基本内容与结构,旨在为民族文化认同的计量研究夯实相关的理论基础,进而准确把握民族文化认同及其相关变量间的确切关系,寻求民族文化认同对于民族延续、社会促进与和谐的理论与实践价值。

关键词：民族文化民族文化认同民族文化认同结构心理测评结构

在线全文

学校读者我要写书评

暂无评论

哈尼族青少年的文化适应及其心理效应

广西民族研究 2016年第3期 94-104页

作者：胡发稳李丽菊荀利波红河学院教师教育学院红河学院云南大学云南蒙自661199 曲靖师范学院人文学院云南曲靖655011 上海师范大学

文化适应是多民族国家社会融合的普遍现象,这种文化调适对人们的环境适应具有促进和消极双重作用。文章采用问卷调查法,对云南省特有跨境而居的哈尼族青少年样本施测,然后基于869个有效样本数据,分析了他们的文化适应结构,及其与学校生... 详细信息

文化适应是多民族国家社会融合的普遍现象,这种文化调适对人们的环境适应具有促进和消极双重作用。文章采用问卷调查法,对云南省特有跨境而居的哈尼族青少年样本施测,然后基于869个有效样本数据,分析了他们的文化适应结构,及其与学校生活满意度、学校适应之间的相互关系。结果表明:哈尼族青少年学生的文化适应呈非平衡性发展特点,教育促进效应极为显著,受教育程度越高,越能适应文化变迁;文化适应是学校适应的一个核心前因变量,具有积极的直接和间接心理效应。本研究可为学校开展多元文化教育和增强学生学校适应能力提供决策依据和实践参考。

关键词：哈尼族青少年文化适应学校适应

在线全文

学校读者我要写书评

暂无评论

大学生中文独体字知觉加工效应

心理发展与教育 2023年第5期39卷 617-624页

作者：胡发稳李应兵李丽菊红河学院教师教育学院云南蒙自661199 红河学院数学与统计学院云南蒙自661199

采用Navon型复合刺激识别任务,考察中文独体字知觉加工的优先效应。结果表明:构形关系上独体字识别有笔画数效应,呈局部优先性,受练习、认知组块影响。定向关系中复合独体字识别呈整体优先性,慢于单体字和复合图的识别,不受笔画、局部... 详细信息

采用Navon型复合刺激识别任务,考察中文独体字知觉加工的优先效应。结果表明:构形关系上独体字识别有笔画数效应,呈局部优先性,受练习、认知组块影响。定向关系中复合独体字识别呈整体优先性,慢于单体字和复合图的识别,不受笔画、局部性质影响,当局部构件有独立语义或构形意义时,优先效应反转,局部优先性增强。结论认为局部与整体构形优先关系,局部意义负载影响视知觉加工模式,独体字识别由局部和整体加工合力完成。

关键词：独体字字识别整体优先知觉加工

同方期刊数据库