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Fixed Ammonium Content and Maximum Capacity of Ammonium Fixation in Major Types of Tillage Soils in Hunan Province,China

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Agricultural Sciences in China 2007年第4期6卷 466-474页

作者： ZHANG Yang-zhu HUANG Shun-hong WAN Da-juan HUANG Yun-xiang ZHOU Wei-jun ZOU Ying-bin College of Resources and Environment Hunan Agricultural University Changsha 410128 P.R.China College of Metallurgical Science and Technology Central South University Changsha 410083 P.R.China College of Resources and Environment Sciences Hunan Normal University Changsha 410081 P.R.China Institute of Rice Hunan Agricultural University Changsha 410128 P.R.China

In order to understand the status of fixed ammonium, fixed ammonium content, maximum capacity of ammonium fixation, and their influencing factors in major types of tillage soils of Hunan Province, China, were studied with sampling on fields, and laboratory incubation and determination. The main results are summarized as follows：（1） Content of fixed ammonium in the tested soils varies greatly with soil use pattern and the nature of parent material. For the paddy soils, it ranges from 135.4 ± 57.4 to 412.8±32,4 mg kg^-1, with 304.7±96.7 mg kg^-1 in average; while it ranges from 59.4 to 435.7 mg kg^-1, with 230.1 ± 89.2 mg kg^-1 in average for the upland soils. The soils developed from limnic material and slate had higher fixed ammonium content than the soils developed from granite. The percentage of fixed ammonium to total N in the upland soils is always higher than that in the paddy soils. It ranges from 6.1 ±3.6% to 16.6±4.6%, with 14.0% ±5.1% in average for the paddy soils and it amounted to 5.8±2.0% to 40.1 ± 17.8%, with 23.5 ± 14.2% in average for upland soils. （2） The maximum capacity of ammonium fixation has the same trend with the fixed ammonium content in the tested soils. For all the tested soils, the percentage of recently fixed ammonium to maximum capacity of ammonium fixation is always bellow 20% and it may be due to the fact that the soils have high fertility and high saturation of ammonium-fixing site. （3） The clay content and clay composition in the tested soils are the two important factors influencing their fixed ammonium content and maximum capacity of ammonium fixation. The results showed that hydrous mica is the main 2：1 type clay mineral in 〈 0.02 mm clay of the paddy soils, and its content in 0.02-0.002 mm clay is much higher than that in 〈 0.002 mm clay of the soils. The statistical analysis showed that both the fixed ammonium content and the maximum capacity of ammonium fixation of the paddy soils were positively correlated with the total 2：1

关键词： Hunan Province tillage soils paddy soil upland soil fixed ammonium maximum capacity of ammonium fixation

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Separation of Ephedrines Using 1-Butyl-3-methylimidazolium-tetrafluoroborate Ionic Liquids as Eluent in High-performance Liquid Chromatography (HPLC)

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Chinese Chemical Letters 2003年第6期14卷 603-604页

作者： Li jun HE, Wen zhu ZHANG, Bo WEN, Xia LIU, Sheng Xiang jiaNG* Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000 Lanzhou Inst. of Chemical Physics Chinese Academy of Science Lanzhou 730000 China

A simple, effective HPLC method for separation of ephedrines was achieved by using 1-butyl-3-methylimidazolium-tetrafluoroborate ionic liquid solution (0.1% v/v) as eluent at pH 3.0. The involved mechanism may be due to that the imidazolium cations can effectively shield the silanol groups of alkylsilica surface, thereby decreasing band tailing and increasing the separation efficiency.

关键词： Ionic liquid ephedrine HPLC.

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基于投资视角的居民消费结构变动对环境效率的影响

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资源科学 2021年第9期43卷 1764-1777页

作者：赵佳朱雨可西南财经大学工商管理学院成都611130

居民消费结构和投资结构良性互动是畅通国民经济循环、实现经济高质量发展和生态环境高水平保护的重要路径。本文基于投资视角,从理论角度阐释居民消费结构变动对环境效率的影响机制,并利用2003—2017年中国省际面板数据,使用系统GMM模... 详细信息

居民消费结构和投资结构良性互动是畅通国民经济循环、实现经济高质量发展和生态环境高水平保护的重要路径。本文基于投资视角,从理论角度阐释居民消费结构变动对环境效率的影响机制,并利用2003—2017年中国省际面板数据,使用系统GMM模型实证分析了居民消费结构升级如何通过投资结构变化影响环境效率。研究表明:(1)在影响机制上,受环境规制、投资回报、清洁技术等因素影响,居民消费结构变动伴生的消费偏好改变将引起投资结构变动,并进一步作用于环境效率;(2)居民消费结构从生存型向发展型升级不仅对环境效率会产生直接正向影响,还会通过投资结构变动间接影响环境效率,但间接影响效应的大小和方向取决于投资结构偏向;(3)居民消费结构升级有利于推动投资结构向第三产业优化,进而正向促进环境效率提高。但投资结构若偏向高污染行业,虽能提高产出水平,但环境效率反而会因环境污染出现下降。因此,加快消费结构绿色转型、引导投资向发展型消费倾斜、加大顺应消费结构升级的低排放、气候适应型投资是实现经济与环境可持续发展的可行选择。

关键词：消费结构投资结构环境效率非期望产出 SBM模型交互效应

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Development and characterization of a novel common wheat–Mexico Rye T1DL·1RS translocation line with stripe rust and powdery mildew resistance

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Journal of Integrative Agriculture 2023年第5期22卷 1291-1307页

作者： LI jiao-jiao ZHAO Li Lü Bo-ya FU Yu ZHANG Shu-fa LIU Shu-hui YANG Qun-hui WU jun LI jia-chuang CHEN Xin-hong Shaanxi Key Laboratory of Plant Genetic Engineering Breeding College of AgronomyNorthwest A&F UniversityYangling 712100P.R.China

Rye(Secale cereale L., 2n=2x=14, RR) is a significant genetic resource for improving common wheat because of its resistance to multiple diseases and abiotic-stress tolerant traits. The 1RS chromosome from the German cultivated rye variety Petkus is critical in wheat breeding. However, its weakened disease resistance highlights the need to identify new resources. In the present study, a novel derived line called D27 was developed from common wheat and Mexico *** observations characterized the karyotype of D27 as 2n=42=21 Ⅱ. Genomic in situ hybridization indicated that a pair of whole-arm translocated Mexico Rye chromosomes were inherited typically in the mitotic and meiosis stages of D27. Experiments using fluorescence in situ hybridization(FISH) and gliadin electrophoresis showed that D27 lacked wheat 1DS chromosomes. They were replaced by 1RS chromosomes of Mexico Rye, supported by wheat simple-sequence repeat markers, rye sequence characterized amplified region markers, and wheat 40K SNP array *** wheat 1DS chromosomes could not be detected by molecular markers and wheat SNP array, but the presence of rye 1RS chromosomes was confirmed. Agronomic trait assessments indicated that D27 had a higher tiller number and enhanced stripe rust and powdery mildew resistance. In addition, dough properties analysis showed that replacing 1DS led to higher viscosity and lower dough elasticity in D27, which was beneficial for cake making. In conclusion, the novel cytogenetically stable common wheat–Mexico Rye T1DL·1RS translocation line D27 offers excellent potential as outstanding germplasm in wheat breeding programs focusing on disease resistance and yield improvement. Additionally,it can be valuable for researching the rye 1RS chromosome’s genetic diversity.

关键词： common wheat disease resistance dough properties rye translocation line

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基于图像跟踪的孔洞目标提取与区域定位研究

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光子学报 2008年第2期37卷 391-394页

作者：朱煜江林佳华东理工大学信息科学与工程学院上海200237

针对纤维材料图像分割后提取的目标图像孔洞之间粘连明显、不封闭、分布不均匀和大小不一等特点,采用常规链码与带方向链码两种跟踪手段,运用链码差实现了对边缘的方向性表示.通过结合三点圆拟合算法,对目标孔洞边缘进行了补全,再用链... 详细信息

针对纤维材料图像分割后提取的目标图像孔洞之间粘连明显、不封闭、分布不均匀和大小不一等特点,采用常规链码与带方向链码两种跟踪手段,运用链码差实现了对边缘的方向性表示.通过结合三点圆拟合算法,对目标孔洞边缘进行了补全,再用链码跟踪所获得的边缘信息对拟合边缘进行修正,实现了对目标孔洞区域的有效定位.

关键词：带方向跟踪圆拟合边缘检测区域定位

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Correlation between serum markers and transjugular intrahepatic portosystemic shunt prognosis in patients with cirrhotic ascites

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 481-490页

作者： Xiao-Gang Hu Xiao-Xian Yang jun Lu Gang Li jian-Ji Dai jia-Min Wang Yi Deng Rui Feng Department of Interventional Radiology The Affiliated Jinhua HospitalZhejiang University School of MedicineJinhua 321000Zhejiang ProvinceChina Medical College Jinhua PolytechnicJinhua 321017Zhejiang ProvinceChina Department of Interventional Medicine Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou 310000Zhejiang ProvinceChina

BACKGROUND Individuals with refractory ascites in the context of liver cirrhosis typically face an adverse *** transjugular intrahepatic portosystemic shunt(TIPS)is an efficacious intervention,but there is a lack of reliable tools for postoperative pro-gnosis *** utilized clinical biochemical markers,such as the serum albumin concentration(Alb),sodium(Na+)concentration,and serum creatinine(Scr),have limited predictive ***,the quest for novel,specific biomarkers to evaluate the post-TIPS prognosis in patients with liver cirrhosis and refractory ascites holds significant practical importance.A retrospective analysis was conducted on 75 patients with liver cirrhosis and refractory ascites who underwent TIPS at our institution from August 2019 to August *** patients were followed up regularly for two years,and the death toll was meticulously *** patients were allocated into a survival group(n=45 patients)or a deceased group(n=30 patients)based on their prognosis *** clinical data of the two groups were collected,and Child-Pugh scores and MELD scores were calculated for *** correlation analysis was carried out to evaluate the correlation of prognosis with Child-Pugh grade,MELD score,and Cys C ***,a multiple-factor analysis utilizing the Cox proportional hazard model was used to identify independent risk factors affecting the post-TIPS prognosis of patients with liver cirrhosis and refractory *** receiver operating characteristic curve(ROC)ascertained the predictive value of the Cys C concen-tration,Child-Pugh grade,and MELD score for the prognosis of liver cirrhosis with refractory ascites in post-TIPS *** During a 2-year follow-up period,among 75 patients with liver cirrhosis and refractory ascites who underwent TIPS treatment,30 patients(40.00%)passed *** deceased cohort exhibited heightened aspartate aminotrans-ferase,alanine aminotransferase,total b

关键词： Liver cirrhosis Refractory ascites Transjugular intrahepatic portosystemic shunt Cystatin C

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DFT Study of Oxygenated Organic Pollutants Catalyzed by Molybdenum Oxides: Comparison of Reaction Mechanisms of MoO_x + HCHO(x = 1, 2, 3)

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Chinese Journal of Structural Chemistry 2019年第8期38卷 1229-1240页

作者： GAO Xiao-Zhen LIANG Yan YANG Jing MENG Xiang-jun YANG Xiao-Chun jia Jing-Xian XUWen-Guo Yangquan Municipal Key Laboratory of Quantum Manipulation Shanxi Institute of TechnologyYangquan045000China Department of Chemistry Tangshan Normal CollegeTangshan063000China Institute for Physical Chemistry Beijing Institute of TechnologyBeijing100081China

The reaction mechanisms between formaldehyde and MoOx(x = 1, 2, 3) have been studied thoroughly in this paper. Five reaction pathways were found in three reactions(reactions Ⅰ to Ⅲ) through studying the mechanisms of MoOx(x = 1, 2, 3) catalyzing formaldehyde. Different products were obtained from three reactions. Of all three reactions, the barrier energy of Route ⅡA is the lowest(4.70 kcal/mol), which means in MoOx(x = 1, 2, 3), MoO2 has the best catalytic effect. Compared with other similar non-toxic treatments of formaldehyde, our barrier energy is the lowest. In this research, there was no good leaving group of the compound, so the mechanisms are addition reaction. We speculate that there must be an addition reaction to the more complex reactions to molybdenum oxides and aldehydes. As a chemical reagent for removing formaldehyde, it only absorbs formaldehyde and does not emit other toxic substances outward. Molybdenum oxides retain its original structures of the final products, which means it has excellent stability in the reaction of MoOx(x = 1, 2, 3) + HCHO. The mechanisms of all three reactions are addition reactions, but they are entirely different. As the number of oxygen atoms increases, the reaction mechanisms become simpler.

关键词： reaction mechanism formaldehyde elimination molybdenum oxides addition reaction barrier energy

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miR-378-mediated glycolytic metabolism enriches the Pax7^(Hi) subpopulation of satellite cells

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Cell Regeneration 2022年第1期11卷 109-118页

作者： Hu Li Lin Kang Rimao Wu Changyin Li Qianying Zhang Ran Zhong Lijing jia Dahai zhu Yong Zhang The Max-Planck Center for Tissue Stem Cell Research and Regenerative Medicine Bioland Laboratory(Guangzhou Regenerative Medicine and Health Guangdong Laboratory)Guangzhou 510005China The State Key Laboratory of Medical Molecular Biology Institute of Basic Medical SciencesChinese Academy of Medical Sciences and School of Basic MedicinePeking Union Medical CollegeBeijing 100005China Department of Endocrinology the Second Clinical Medical College of Jinan UniversityShenzhen People’s HospitalShenzhen 518020China

Adult skeletal muscle stem cells,also known satellite cells(SCs),are a highly heterogeneous population and reside between the basal lamina and the muscle fiber *** function as an immediate niche to support SC self-renewal and activation during muscle growth and ***,we demonstrate that microRNA 378(miR-378)regulates glycolytic metabolism in skeletal muscle fibers,as evidenced by analysis of myofiber-specific miR-378 transgenic mice(TG).Subsequently,we evaluate SC function and muscle regeneration using miR-378 TG *** demonstrate that miR-378 TG mice significantly attenuate muscle regeneration because of the delayed activation and differentiation of ***,we show that the miR-378-mediated metabolic switch enriches Pax7^(Hi) SCs,accounting for impaired muscle regeneration in miR-378 TG ***,our data suggest that miR-378 targets the Akt1/FoxO1 pathway,which contributes the enrichment of Pax7^(Hi) SCs in miR-378 TG ***,our findings indicate that miR-378 is a target that links fiber metabolism to muscle stem cell heterogeneity and provide a genetic model to approve the metabolic niche role of myofibers in regulating muscle stem cell behavior and function.

关键词： satellite cells muscle regeneration miRNAs glycolytic metabolism

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Design and Implementation of Fresh Vegetable Sales Volume Trend Forecasting System Based on Improved SVR

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Agricultural Biotechnology 2021年第4期10卷 98-103页

作者： Wang LYU Yuan RAO jun zhu School of Information and Computer Science Anhui Agricultural UniversityHefei 230036China Big Data Application Development Authority of Shapingba District Shapingba 400030China

The forecast of sales volume trend of fresh vegetables has significant referential function for government dominant departments,producers and *** order to evaluate the e-commerce sales information of fresh vegetables scientifically and accurately,the sales volume information of such four common vegetables as baby cabbage,potatoes,bok choy and tomatoes,from Anhui Jinghui Vegetable E-commerce Co.,*** selected as the research object to establish the sales trend prediction *** the improved SVR as an example,we introduced the overall architecture,detailed design and function realization of the *** system can reflect the short-term sales volume trend of fresh vegetables,and also can provide guidance for the realization of e-commerce order-oriented management and scientific production.

关键词： Fresh vegetables sales Trend prediction Support vector regression model System application

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Two new bromoindoles from red alga Laurencia similis

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Chinese Chemical Letters 2009年第4期20卷 456-458页

作者： Hua Su Zhao Hui Yuan Jing Li Shu Ju Guo Li Ping Deng Li jun Han Xiao Bin zhu Da Yong Shi Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

Two new bromoindole alkaloids have been isolated from the ethanolic extract of the red alga Laurencia similis. On the basis of chemical and spectroscopic methods （including 1D and 2D NMR technique）, their structures have been elucidated as 2,2＇,5,5＇,6,6＇- sixibromo-3, 3＇-bi-lH-indole and 3, 5-dibromo-1-methylindole, respectively.

关键词： Laurencia similis Bromoindole alkaloid 2,2',5,5',6,6'-Sixibromo-3,3'-bi-lH-indole 3,5-Dibromo-l-methylindole

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