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A three-dimensional modeling of the morphological change in the Liaodong Bay

Frontiers of Earth Science 2015年第3期9卷 509-520页

作者： Qiushun WANG Haigui KANG State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China

The morphology in the Liaodong Bay has undergone a marked change over the past decades due to the cutoff of nearby rivers. The fine sediment of the bay consists of both non-cohesive and cohesive fractions with relatively small particles over the seabed. Thus, a three- dimensional morphodynamic model accounting for non- cohesive and cohesive fractions is established to investi- gate the morphological change without sediment input from nearby rivers. A representative wave is chosen to compute the wave distribution in the Liaodong Bay and depth-dependent wave radiation stresses are employed by the hydrodynamic model. The advection-diffusion equa- tion is used to simulate the fine sediment transport under the representative wave and tidal currents. The erosion flux of non-cohesive and cohesive sediment is taken into account. The simulated results of tidal level, velocities, directions, and sediment concentrations are in agreement with the measured data. The results demonstrate that the present model, which takes the erosion flux of both non- cohesive and cohesive fractions into account, gives more reasonable values than when accounting for cohesive sediment alone. When the three-dimensional morphody- namic model is applied to predict morphological change over the course of a year, the deposition is shown to be relatively small and the range of the erosion is increased compared to previous results of sediment input from the river. It can be concluded that the erosion in the Liaodong Bay is increasing due to the cutoff of the river, and that morphological evolution must be taken into account if any type of coastal construction plans are to be carried out over the seabed.

关键词： fine sediment three-dimensional model morphological change representative wave

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morphological change of Early Spontaneous Recanalization Following Internal Carotid Artery Occlusion due to Possible Dissection

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Chinese Medical Journal 2016年第22期129卷 2757-2758页

作者： Zhi Zhou Duan Qian Lei Liu Wen-Xiong Tang Shu-Hong Jia Zun-Jing Liu Department of Geriatrics China-Japan Friendship Hospital Beijing 100029 China Department of Neurology China-Japan Friendship Hospital Beijing 100029 China

The early period of spontaneous recanalization is commonly described as within hours to weeks after internal carotid artery （ICA） *** occlusion due to carotid artery dissection （CAD）,early recanalization is observed in 57-59% of cases.[1] CAD is a highly dynamic process with dramatic morphological changes in the early stage of the disease;however,little is known about the radiographic findings in the initial week.

关键词： Carotid Artery Dissection High-resolution Magnetic Resonance Imaging morphological change

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morphological change of Starch Grain Based on Simulated Experiment and its Significance of Agricultural Archaeology——Taking Wheat as an Example

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Agricultural Science & Technology 2011年第11期12卷 1621-1624页

作者：万智巍杨晓燕马志坤刘光旭中国科学院地理科学与资源研究所北京100101 中国科学院研究生院北京100049

[Objective] The aim was to research and identify starch grain microfossil found in archaeological sites in China, and to find appropriate procedures for the starch grain analysis experiment.[Method] Wheat starch grain size distribution was analyzed, and some simulated experiments were carried out, like mortar grinding, ultrasonic treatment, hydrochloric acid and hydrogen peroxide immersion, drying treatment, and so on. [Result] The mean size of wheat starch grains had increased in the growth process. Mortar grinding would make wheat starch grains larger than untreated sample. Long time of ultrasonic treatment can also make the starch grain size larger. 10% HCl and 6% H2O2 would have little effects on morphological feature of wheat starch grains. Low temperature heating did not cause starch grains to be gelatinized. [Conclusion] These experiment results can improve the accuracy of starch grain microfossil identification in the archaeological site. Starch grain analysis may be a utility and effective analytical tool in studying the origin of agriculture and the dispersal of crops in China.

关键词： Starch grain analysis Wheat morphological change Agricultural archaeology

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morphological comparison and molecular marker screening of three Skeletonema species found in Changjiang(Yangtze)River Basin

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Journal of Oceanology and Limnology 2024年第3期42卷 923-942页

作者： Jingwen HU Yuxin YI Zhengxin YANG John Patrick KOCIOLEK Pan YU Quanxi WANG Qingmin YOU College of Life Sciences Shanghai Normal UniversityShanghai 200235China Museum of Natural History University of ColoradoBoulder 80309USA College of Environmental and Geographical Sciences Shanghai Normal UniversityShanghai 200235China

In our recent investigations of diatom diversity,we studied three species,namely,Skeletonema costatum,Skeletonema subsalsum,and Skeletonema *** they have been found frequently in Changjiang(Yangtze)River Basin,their morphological and molecular identification is difficult in ***,to integrate morphological and molecular biological approaches,we compared systematically their morphological characters and performed phylogenetic *** strains of Skeletonema were collected and isolated from Shanghai and Jiangsu,China,and their morphological characteristics were examined by light microscopy(LM)and the scanning electron microscopy(SEM).Based on morphological comparison,we determined that *** is easy to distinguish from the other two *** heavily silicified areolae,undulated or cleft distal ends of terminal fultoportula processes(TFPPs),absence of basal pores of fultoportula processes(FPPs),the rootlike protrusions of FPPs,and no interlocking connection are the stable characteristics that can be used to identify ***,there are only two features that can distinguish *** from ***,namely the location of terminal rimoportulae(TRPs)and the distal shape of *** addition,we amplified and sequenced nine common genetic markers from the strains,from which 101 sequences were obtained,constructed phylogenetic trees based on the nine genes and evaluated that seven genes can be used to identify ***,and revealed that *** is the closest known relative of ***,and only ATP synthetase beta-subunit gene(atp B)is able to distinguish them from each other,which strongly support that it is an effective molecular marker for *** work provided a theoretical basis for the taxonomic study of Skeletonema.

关键词： Skeletonema Changjiang River morphological change distinguishing morphological characteristics molecular marker

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morphological changes of silver and bighead carp in the Yangtze River over the past 50 years

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Zoological Research 2010年第6期31卷 651-656页

作者：于红霞唐文乔李思发上海海洋大学鱼类研究室水产种质资源发掘与利用教育部重点实验室上海201306

Multivariate analysis was adopted to analyze 30 morphometrical characteristics of 121 one-year-old juvenile silver carp （Hypophthalmichthys molitrix） and bighead carp （Aristichthys nobilis） bred during the 1950s （＂the former population＂） and 2008 （＂the current population＂） and collected from the middle reach of the Yangtze River. The average discriminant accuracies of the former and current silver and bighead carp population were 94.2% and 98.0%, respectively. Discriminant analysis also revealed that significant differences in morphology occurred between the former and current populations of both carp in overall characteristics. One-way analysis of variance indicated that between former and current populations, silver carp showed highly significant differences （P0.01） in twelve of their characteristics and significant differences （P0.05） in eight of their characteristics, while bighead carp showed highly significant differences （P0.01） in eight of their characteristics and significant differences （P0.05） in eight of their characteristics. Six head morphology variables of the current silver and bighead carp were significantly or highly significantly larger than the former populations; fourteen characteristics of silver carp and ten characteristics of bighead carp of the current populations, mainly reflecting truck and tail morphology, were significantly or very significantly smaller than the former populations. Our results indicate that silver and bighead carp have developed a larger head and smaller truck and tail during the last 50 years. Due to such morphological changes, it seems apparent that the heads of these fish species need to be considered in regards to human diets, particularly in relation to economic and nutritious value.

关键词： Silver carp Bighead carp 50 years breeding morphological change Yangtze River

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The Effects of Reclamation Activity and Yellow River Runoff on Coastline and Area of the Laizhou Bay,China

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Journal of Ocean University of China 2021年第3期20卷 729-739页

作者： XU Yandong GAO Huiwang WEI Xiao ZHU Jinlong Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China Shandong Provincial Key Laboratory of Restoration for Marine Ecology Shandong Marine Resource and Environment Research InstituteYantai 264006China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Study on morphological changes of a bay can help to identify the effects of anthropogenic activities on coastal environ-ment and guide the exploration of marine *** this paper,morphological data including coastline and water areas in five discrete years between 1968 and 2015 were selected and extracted from the remote sensing images and historical marine charts to study the morphological changes in Laizhou Bay(LZB),one of the bays in the southwest of the Bohai Sea.A systematic analysis on spatial variations of the coastline and the surface areas of different types of waters in LZB was *** results showed that the surface area of LZB was decreased by 1253.2km^(2)in the last half century,which is 17.4%of the total in the *** areas of the natural wetland and the intertidal zone were decreased by 17.2%and 56.1%,respectively,and the average water depth varied from 9.05 m to 8.16m at low tide level from 1968 to *** coastline and shape variations of the bay turned to be complex after the 1980s,and the shape index of LZB showed an increasing trend in more recent *** centroid of the bay generally migrated to the northeast direction,i.e.,the direction of the center of the Bohai Sea,and the shrinking direction of the bay was consistent with the migration direction of the *** reclamation area during 1968-2015 in LZB was 1201.7km^(2),and 94.1%was in the inter-tidal *** overall morphological change of the bay during the last half century was mainly controlled by the coastal reclamation activities,and the Yellow River runoff including the river course change and sediment load variation was also an important control-ling factor.

关键词： morphological change coastal reclamation Yellow River runoff Laizhou Bay

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Sensitivity of Different Cytotoxic Responses of Vero Cells Exposed to Organic Chemical Pollutants and their Reliability in the Bio-toxicity Test of Trace Chemical Pollutants

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Biomedical and Environmental Sciences 2010年第3期23卷 219-229页

作者： TING-TING LIAO YAN-LING SHI JIAN-WEI JIA AND LEI WANG College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China

Objective To find a sensitive cytotoxic response to reflect the bio-toxicity of trace organic pollutants, the sensitivity and reliability of morphological change and proliferation inhibition of Vero cells exposed to 2, 4, 6-trichlorophenol （TCP） and the leachate from products related to drinking water （PRDW） were compared, and the mechanism of the morphological change in Vero cells exposed to chemical pollutants was studied. Methods Vero cells were treated by different concentration of TCP and the leachate from PRDW. Methylthiazol-2-yl-2, 5-diphenyl tetrazolium bromide （MTT） assay was carried out for proliferation inhibition. Bioluminescence method was carried out as another method to test the toxicity of TCP. Flow Cytometry assay was used to test cell Apoptosis and damage of cell-membrane. Results 0.25 mg/L TCP had an effect on cell morphology, and the proportion of morphologically changed cells increased with increasing TCP concentration. At low TCP concentrations, inhibition of cell proliferation did not seem to correlate to TCP concentration, and was negative when TCP concentration was 〈1.0 mg/L. After exposure to leachate from PRDW extracted at different temperatures, the percentage of morphologically changed cells increased with extracting temperature, but the inhibition of cell proliferation failed to reflect the correlation between extracting temperature and proliferation inhibition of Vero cells. Although the Sensitivity of bioluminescence method seems to be similar to morphological change in Veto cells, the bacterial in this method is not homologous enough with human body cells to reflect the toxicity to human body. These imply cell morphological change is a more sensitive and reliable method to reflect bio-toxicity of organic pollutants than proliferation inhibition. Flow cytometry analysis and cell rejuvenation experiments indicated cell membrane damage, which results in cell morphological change, was an early and sensitive cytotoxic response comparing w

关键词： Vero cell morphological change Membrane damage Bio-toxicity test Drinking water

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Genetic diversity and morphological characteristics in Bull-headed Shrikes on some isolated islands

Genetic diversity and morphological characteristics in Bull-...

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23rd International Ornithological Congress

作者： Masaoki Takagi Junko Nagata Deptment of Biology Faculty of Science Osaka City University Japan University of California Berkeley USA

＜正＞ We investigated genetical, morphological, and ecological changes arising out of the process of establishment of reproducing populations on oceanic islands, using the Bull-headed Shrike Lanius bucephalus as our test species. The shrikes have recently been introduced on remote islands in the north Pacific, increasing since the 1970s on Minami-daito （MDI） in the Daito Islands, and beginning to breed on Chichi-jima （CJI） in the Ogasawara group.

关键词： isolation heterozygosity morphological change Bull-headed Shrike

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Seawater Acclimation of Spirulina

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Agricultural Science & Technology 2012年第7期13卷 1595-1597,1615页

作者：关邵晨李依璇王干秦琅朱毅罗云波中国农业大学食品科学与营养工程学院北京100083

[Objective] This study aimed to seek the cultivation method for Spirulina with seawater. [Method] Spirulina was habituated culture progressively with prepared seawater acclimation solution. The morphological changes of Spirulina were observed and its biochemical indicators were measured. [Result] A new algae species was obtained, which had better stability and greater average length than Spirulina in fresh water. Compared with the Spirulina in fresh water, the new algae species showed no significant change in chlorophyll content, but a 62.8% increase in the concentration of phycocyanin. [Conclusion] The method could save resources and cost, which lays the foundation for large scale production and processing of Spirulina.

关键词： Spirulina Seawater acclimation morphological change Chlorophyll Concentration of protein

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Study of Myelin Basic Protein Associated with Pediatric Systematic Epilepsy

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中国临床神经科学 2000年第Z1期8卷 92-页

作者： Yang Sida He Xin Yang Yiyu Zhu Huihua He Dansha Deng Weiyi Department. Gangzhou Children's Hospital 510120 Department. Gangzhou Children's Hospital510120 Department. Gangzhou Children's Hospital510120 Department. Gangzhou Children's Hospital510120 Neurological Institute Guangzhou Medical College Guangzhou510182 Neurological Institute Guangzhou Medical College Guangzhou510182

Objective: To investigate the quantitative myelin basic protein (MBP) in cerebrospinal fluid (CSF) and serum in pediatric systematic epilepsy (SEP), study the relation between SEP and MBP, and the possibility predicating'the injury of myelin and blood-brain barrier (BBB) from pediatric SEP. Background: While tactors induced destroy of cerebral and Myelin, MBP was released out into CSF to increase its concentration. On the other hand, the BBB was involved to make serum MBP increased. The related studies had confirmed these viewpoints above. The test for quantitative MBP was recognized as the specific biochemical index, which diagnose if there is or not organic injury of cerebral and myelin. There was few reports about the studies of quantitative MBP in CSF and serum of EP, not mention to those published in domestic pediatric academia. Methods: 47 cases were studied during one month after the SEP attack, whose MBP in serum were quantitatively and 31 inside in CSF were also tested by easy MBP-ELISA method; the quantitative MBP in serum of 30 control cases and 10 in CSF were tested, too. Results: MBP values in CSF and serum of SEP pediatric patients were 2.95±0.61 ng/ml and 3.17±0.53 ng/ml; whereas 1.41 ±0.19 ng/ml and 1.30±0.04 ng/ml in control group. Both mean valves of MBP in CSF and serum in study group were significantly higher than control group (either P＜ 0.01). Discussion: In general, electrophysiological evidences supported the issue that epileptic episode was originated from abnormal electrical activities of nervous cells. Pathological studies revealed degeneration and necrosis of nerve existed in temporal epileptic focus, where there was morphological change of myelin. This study showed MBP values in CSF and serum of SEEP, during one month after attack, increased significantly; suggested there was changed component of MBP, while SEP could not be controled. Those above indicated the destroy of myelin, increasing of BBB permeability that induced its injured fun

关键词： myelin basic protein morphological change cerebrospinal fluid quantitative test

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