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Search Results: 1 - 10 of 44879 matches for " SUN Bai-ye "
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Role of Irradiance on the Seasonality of Skeletonema costatum Cleve Blooms in the Coastal Area in East China Sea
光照与东海近海中肋骨条藻(Skeletonema costatum)赤潮发生季节的关系

SUN Bai-ye,LIANG Sheng-kang,WANG Chang-you,WANG Xiao-bo,WANG Xiu-lin,LI Yan-bin,

环境科学 , 2008,
Abstract: 利用船基现场培养实验和模型计算的方法,研究了光照与东海近海春夏季均能发生中肋骨条藻赤潮的关系.结果表明,中肋骨条藻生长的最适光照强度(Iopt)随水温(t)的增加呈“慢升快降”的不对称“倒V”形变化特征,在25℃左右Iopt最大,为121.6 W·m-R, Iopt-t 曲线符合Blanchard方程; 由东海海表水温计算的中肋骨条藻Iopt的季节变化特征与东海海面光照强度、海水透明度的季节变化基本同步(RR=0.907±0.115, p<0.001),且滞后于海面光照强度2个月左右,这使春夏季海水中光照最适宜生长的水层均为全年最厚(6m左右).可见,中肋骨条藻对光照的适应性很强,海区海水光照的适宜性是春夏季均能形成大规模中肋骨条藻赤潮的重要原因之一.
Effects of Irradiance on Blooms of the Dinoflagellate Prorocentrum Donghaiense Lu in the Coastal Area in East China Sea

SUN Bai-ye,WANG Xiu-lin,LI Yan-bin,WANG Chang-you,WANG Ai-jun,LIANG Sheng-kang,ZHANG Chuan-song,

环境科学 , 2008,
Abstract: With field culture experiments and model calculations, the natural-light-dependent growth and the optimal light layers in sea water for growth of red tide dinoflagellate Prorocentrum donghaiense Lu were studied in order to analyze the role of light on algal blooms in the coastal area in East China Sea in spring. The results show that the relationship of growth and light can be well described by Steele's equation, and the optimal light intensity (Iopt) of P. donghaiense is (38.2 +/- 3.8) W x m(-2), which is lower than Iopt for several other red tide algae (40-133 W x m(-2)), meaning that P. donghaiense may have an advantage when developing blooms in turbid environments where solar irradiance is easily attenuated. The optimal light layers for P. donghaiense growth are thicker offshore than inshore, and the thickness of optimal light layers in the subsurface water usually in 3-15 m in depth is about 5-10 m in the red tide area. The trade-off of light and nutrient fitness results in blooms in the so-called red tide area, and the light-optimum characteristic of the subsurface water is an important factor for the subsurface bloom development in spring.
Atrial Fibrillation-Linked Germline GJA5/Connexin40 Mutants Showed an Increased Hemichannel Function
Yiguo Sun, Matthew D. Hills, Willy G. Ye, Xiaoling Tong, Donglin Bai
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0095125
Abstract: Mutations in GJA5 encoding the gap junction protein connexin40 (Cx40) have been linked to lone atrial fibrillation. Some of these mutants result in impaired gap junction function due to either abnormal connexin localization or impaired gap junction channels, which may play a role in promoting atrial fibrillation. However, the effects of the atrial fibrillation-linked Cx40 mutants on hemichannel function have not been studied. Here we investigated two atrial fibrillation-linked germline Cx40 mutants, V85I and L221I. These two mutants formed putative gap junction plaques at cell-cell interfaces, with similar gap junction coupling conductance as that of wild-type Cx40. Connexin deficient HeLa cells expressing either one of these two mutants displayed prominent propidium iodide-uptake distinct from cells expressing wild-type Cx40 or other atrial fibrillation-linked Cx40 mutants, I75F, L229M, and Q49X. Propidium iodide-uptake was sensitive to [Ca2+]o and the hemichannel blockers, carbenoxolone, flufenamic acid and mefloquine, but was not affected by the pannexin 1 channel blocking agent, probenecid, indicating that uptake is most likely mediated via connexin hemichannels. A gain-of-hemichannel function in these two atrial fibrillation-linked Cx40 mutants may provide a novel mechanism underlying the etiology of atrial fibrillation.
Multifunctional Composites Obtained by Incorporating Nanocrystals into Decorated PVK Polymers
Haizhu Sun,Junhu Zhang,Ye Tian,Yang Ning,Hao Zhang,Jie Ju,Delong Li,Shidong Xiang,Bai Yang
Journal of Nanomaterials , 2007, DOI: 10.1155/2007/38589
Abstract: Poly(vinylcarbazole) (PVK) was decorated with surfactant group to achieve amphiphilic polymer with luminescent property. The composition and properties of the polymers were systematically investigated using FTIR, EA, TGA, UV-Vis, and PL characterizations. Different CdTe nanocrystals (NCs) prepared in aqueous medium were directly transferred to organic phase using the PVK-based polymers. The quantum yield of NCs in the composites had been improved by 50% compared with their parent aqueous solution due to the short distance from carbazole moieties to NCs, which facilitated the Förster resonant energy transfer (FRET) between them. Moreover, efficient electron transfer at the interface of NCs and polymers had been confirmed which also indicated the application in photovoltaic cell for such composites.
Effective Music Sight-Reading Training Strategies Target Visual Working Memory  [PDF]
Jue Zhou, Ying Zhong, Ye Bai
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.71014
Abstract: Sight reading is a functional skill which is essential for all musicians involved in particular fields of classical music culture. Reviewing the achievements from empirical science, this article investigates Visual Spatial Sketchpad (an essential part of working memory) during the process of sight-reading, and tries to decipher its mechanism by categorizing the information types of music sheet. After analyzing, we provide two models to explain the different performing styles between novice and expert: Hierarchical Progressive Model and Parallel Dispose Model, which pinpoint Selective Attention as the key element of sight-reading process. Finally, two target training strategies are tentatively proposed: Visual Searching Template Training and Automated Binding Training. If we compose specific training materials by adopting these two strategies, it would be promising that the speed at which students can master sight-reading skills will be increased.
Development of marker-free transgenic Jatropha plants with increased levels of seed oleic acid
Jing Qu, Hui-Zhu Mao, Wen Chen, Shi-Qiang Gao, Ya-Nan Bai, Yan-Wei Sun, Yun-Feng Geng, Jian Ye
Biotechnology for Biofuels , 2012, DOI: 10.1186/1754-6834-5-10
Abstract: The enzyme 1-acyl-2-oleoyl-sn-glycero-3-phosphocholine delta 12-desaturase (FAD2) is the key enzyme responsible for the production of linoleic acid in plants. We identified three putative delta 12 fatty acid desaturase genes in Jatropha (JcFAD2s) through genome-wide analysis and downregulated the expression of one of these genes, JcFAD2-1, in a seed-specific manner by RNA interference technology. The resulting JcFAD2-1 RNA interference transgenic plants showed a dramatic increase of oleic acid (> 78%) and a corresponding reduction in polyunsaturated fatty acids (< 3%) in its seed oil. The control Jatropha had around 37% oleic acid and 41% polyunsaturated fatty acids. This indicates that FAD2-1 is the major enzyme responsible for converting oleic acid to linoleic acid in Jatropha. Due to the changes in the fatty acids profile, the oil of the JcFAD2-1 RNA interference seed was estimated to yield a cetane number as high as 60.2, which is similar to the required cetane number for conventional premium diesel fuels (60) in Europe. The presence of high seed oleic acid did not have a negative impact on other Jatropha agronomic traits based on our preliminary data of the original plants under greenhouse conditions. Further, we developed a marker-free system to generate the transgenic Jatropha that will help reduce public concerns for environmental issues surrounding genetically modified plants.In this study we produced seed-specific JcFAD2-1 RNA interference transgenic Jatropha without a selectable marker. We successfully increased the proportion of oleic acid versus linoleic in Jatropha through genetic engineering, enhancing the quality of its oil.The depletion of world petroleum reserves, increasing prices and the rising pollution concerns has stimulated the search for alternative renewable fuel sources. Biodiesel from plants is rapidly emerging as the alternative to petroleum fuel. The fuel properties of biodiesel are highly dependent on the composition of the fatty acid
Screening of a Chitosan-Hydrolytic Bacterium and Optimazation of its Fermentation Conditions

lijianfeng,liu bi qian,hong song bai,sun shuang shuang,ye xia qing,

水生态学杂志 , 2010,
Abstract: 从虾塘底泥中分离到1株高产壳聚糖酶的菌株,将其命名为QY01.研究发现其最适培养基组分为胶体壳聚糖1.0%、葡萄糖0.1%、酵母粉0.3%、K2HPO4·3H2O 0.2%、MgSO4·7H2O 0.1%、NaCl 0.5%、(NH4)2SO4 0.5%、起始pH 6.最适培养条件为6%接种量,30℃、160 r/min培养72 h,在此条件下发酵液酶活可达10.87 U/mL,表明筛选到的菌株在降解壳聚糖方面具有较好的利用价值和开发前景.对QY01进行了16S rDNA形态特征及生理生化特性鉴定分析,经序列比对,该菌株与芽孢杆菌属的同源性高达99%;形态特征与生理生化鉴定结果与16S rDNA鉴定结果相符,初步鉴定为芽孢杆菌属(Bacillus sp.).
Analysis of the Chemical Safety Facility Investment Performance in China  [PDF]
Kang Sun, Long Bai, Xiaohong Li
Advances in Chemical Engineering and Science (ACES) , 2015, DOI: 10.4236/aces.2015.51011
Abstract: This paper adopts the accident incidence, the gross industry output value, the investment in safety facilities, and per capita wage of employment as the indexes to empirically analyze the investment performance of chemical safety facilities using time series data by VECM in China. The empirical results indicate that for China’s chemical industry, increasing investment fails to improve the short-term safety level significantly because of the offsetting behavior of workers. Over the long term, the offsetting behavior tends to disappear, and the chemical accident incidence can be decreased through increasing investment. Poor safety awareness among workers is one of the causes of accident incidences. The conclusions provide theoretical support for China to perfect chemical industry safety management.
Isolation and Characterization of Cytotoxic, Aggregative Citrobacter freundii
Li Bai, Shengli Xia, Ruiting Lan, Liyun Liu, Changyun Ye, Yiting Wang, Dong Jin, Zhigang Cui, Huaiqi Jing, Yanwen Xiong, Xuemei Bai, Hui Sun, Jin Zhang, Lei Wang, Jianguo Xu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0033054
Abstract: Citrobacter freundii is an infrequent but established cause of diarrhea in humans. However, little is known of its genetic diversity and potential for virulence. We analyzed 26 isolates, including 12 from human diarrheal patients, 2 from human fecal samples of unknown diarrheal status, and 12 from animals, insects, and other sources. Pulsed field gel electrophoresis using XbaI allowed us to divide the 26 isolates into 20 pulse types, while multi-locus sequence typing using 7 housekeeping genes allowed us to divide the 26 isolates into 6 sequence types (STs) with the majority belonging to 4 STs. We analyzed adhesion and cytotoxicity to HEp-2 cells in these 26 strains. All were found to adhere to HEp-2 cells. One strain, CF74, which had been isolated from a goat, showed the strongest aggregative adhesion pattern. Lactate dehydrogenase (LDH) released from HEp-2 cells was evaluated as a measure of cytotoxicity, averaging 7.46%. Strain CF74 induced the highest level of LDH, 24.3%, and caused >50% cell rounding, detachment, and death. We named strain CF74 “cytotoxic and aggregative C. freundii.” Genome sequencing of CF74 revealed that it had acquired 7 genomic islands, including 2 fimbriae islands and a type VI secretion system island, all of which are potential virulence factors. Our results show that aggregative adherence and cytotoxicity play an important role in the pathogenesis of C. freundii.
Global Transcriptional and Phenotypic Analyses of Escherichia coli O157:H7 Strain Xuzhou21 and Its pO157_Sal Cured Mutant
Hongqing Zhao, Chen Chen, Yanwen Xiong, Xuefang Xu, Ruiting Lan, Haiyin Wang, Xinyue Yao, Xiangning Bai, Xuetong Liu, Qiong Meng, Xiaoai Zhang, Hui Sun, Ailan Zhao, Xuemei Bai, Yuli Cheng, Qiang Chen, Changyun Ye, Jianguo Xu
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0065466
Abstract: Escherichia coli O157:H7 is an important food-borne pathogen that can cause hemorrhagic colitis and hemolytic-uremic syndrome in humans. pO157_Sal, a novel conjugative plasmid is present in a Chinese O157:H7 outbreak strain Xuzhou21. Here we investigated the phenotypic and transcriptional differences between the wild type strain Xuzhou21 and the pO157_Sal cured mutant strain Xuzhou21m. RNA-Seq analysis found that all 52 ORFs encoded on pO157_Sal were transcribed. One hundred and sixty eight chromosomal and pO157 genes were differentially expressed (≥2 fold difference) between Xuzhou21 and Xuzhou21m. Sixty-seven and 101 genes were up-regulated and down-regulated respectively by pO157_Sal including genes related to stress response, adaption and virulence. The plasmid-cured mutant Xuzhou21m grew slower than wild type Xuzhou21 and pO157_Sal plasmid complemented strain Xuzhou21c in M9 medium under the condition of high NaCl or presence of sodium deoxycholate (NaDC), corroborating with the RNA-Seq data. Seven differentially expressed genes are associated with NaDC resistance, including the adenine-specific DNA-methyltransferase gene (dam), multidrug efflux system subunit gene mdtA, hyperosmotically inducible periplasmic protein gene osmY and oxidation-reduction related genes while two differentially expressed genes (osmY and pspD) are likely to be related to resistance to osmotic pressure. A number of differentially expressed genes were virulence associated including four genes encoding T3SS effectors from the chromosome and ehxD from pO157. Through complementation of Xuzhou21m with a plasmid construct carrying the pO157_Sal hha homolog we further showed that the pO157_Sal hha represses the expression of T3SS effectors. These findings demonstrated that the plasmid pO157_Sal affects the transcription of the chromosomal and pO157 plasmid genes and contributes to the enhanced ability to resist stress. We conclude that pO157_Sal plays an important role in regulating global gene expression and affects the virulence and adaptation of E. coli O157:H7.
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