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Synthesis and Characterization of Osmium Polycyclic Aromatic Complexes via Nucleophilic Reactions of Osmapentalyne

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Chinese Journal of Chemistry 2017年第5期35卷 628-634页

作者： Qin Zhu Congqing Zhu Zhihong Deng Guomei He Jiangxi chen jun Zhu Haiping Xia State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Center of Chemistry for Energy Materials ( iChEM) and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China Department of Materials Science and Engineering College of Materials Xiamen University Xiamen Fujian 361005 China

Treatment of osmapentalyne [Os { ≡C-C（COOMe）=CH-C =CH-C（PPh3） =CH-}Cl（PPh3）2]＋ BF4-with arylamines in the presence of Cs2CO3 produced osmium-bridged polycyclic aromatic *** this reaction,metal carbyne of osmapentalyne was first attacked by nucleophiles,followed by a C-H oxidative *** UV-Vis spectra of these osmium-bridged polycyclic aromatic complexes were *** result shows that these osmium-bridged polycyclic aromatic complexes have broad absorption in the UV-Vis region up to 650 nm.

关键词： metallapentalyne carbyne aromaticity nucleophilic C--H activation

Aortic dissection with epileptic seizure: A case report

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World Journal of Clinical Cases 2022年第31期10卷 11542-11548页

作者： Bo Zheng xue-Qiong Huang Zhao chen Jian Wang Gang-Feng Gu Xiao-Jing Luo Department of Neurology Yaan People’s HospitalYaan 625000Sichuan ProvinceChina Department of Oncology Yaan People’s HospitalYaan 625000Sichuan ProvinceChina

BACKGROUND Aortic dissection(AoD)is a life-threatening *** diversified clinical manifestations,especially the atypical ones,make it difficult to *** epileptic seizure is a neurological problem caused by various kinds of diseases,but AoD with epileptic seizure as the first symptom is *** SUMMARY A 53-year-old male patient suffered from loss of consciousness for 1 h and tonicclonic convulsion for 2 *** patient performed persistent hypomania and chest discomfort for 30 min after *** had a history of hypertension without regular antihypertensive drugs,and the results of his bilateral blood pressure varied *** the electroencephalogram showed the existence of epileptic *** thoracic aorta computed tomography angiography showed the appearance of AoD,and it originated at the lower part of the ascending ***,the diagnosis was AoD(DeBakey,type I),acute aortic syndrome,hypertension(Grade 3),and secondary epileptic *** was given symptomatic treatment to relieve symptoms and prevent ***,the medical therapy was effective but he refused our surgical *** The AoD symptoms are *** diagnosing the epileptic seizure etiologically,AoD is important to consider by clinical and imaging examinations.

关键词： Aortic dissection Epileptic seizure Hypertension Diagnosis Surgical treatment Case report

Epigenetics recording varied environment and complex cell events represents the origin of cellular aging

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2019年第7期20卷 550-562页

作者： xue-jun GUO Dong YANG Xiang-yuan ZHANG State Key Laboratory of Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Gene Engineering and Biotechnology Beijing Key Laboratory College of Life SciencesBeijing Normal UniversityBeijing 100875China

Although a relationship between epigenetics and aging phenotypic changes has been established,a theoretical explanation of the intrinsic connection between the epigenetics and aging is *** this essay,we propose that epigenetic recording of varied cell environment and complex history could be an origin of cellular *** epigenetic modifications,the environment and historical events can induce the chromatin template into an activated or repressive accessible structure,thereby shaping the DNA template into a spectrum of chromatin *** inner nature of diversity and conflicts born by the cell environment and its historical events are hence recorded into the chromatin *** could result in a dissipated spectrum of the chromatin state and chaos in overall gene *** unavoidable degradation of epigenome entropy,similar to Shannon entropy,would be consequently *** resultant disorder in epigenome,characterized by corrosion of epigenome entropy as reflected in chromatin template,can be stably memorized and propagated through cell ***,the hysteretic nature of epigenetics responding to the emerging environment could exacerbate the degradation of epigenome *** well as stochastic errors,we propose that outside entropy(or chaos) derived from the varied environment and complex cell history,gradually input and imprinted into the chromatin via epigenetic modifications,would lead inevitably to cellular aging,the extent of which could be aggravated by hysteresis of epigenetics without error erasing and correction.

关键词： Epigenetics Environment Cell event Cellular aging Epigenome entropy DNA methylation

Experimental porcine model of complex fistula-in-ano

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World Journal of Gastroenterology 2017年第10期23卷 1828-1835页

作者： Ma-Mu-Ti-Jiang A Ba-Bai-Ke-Re Hui chen xue Liu Yun-Hai Wang Department of Anorectal Surgery First Affiliated HospitalXinjiang Medical UniversityUrumqi 830011Xinjiang Uygur Autonomous RegionChina

AIM To establish and evaluate an experimental porcine model of *** Twelve healthy pigs were randomly divided into two groups. Under general anesthesia, the experimental group underwent rubber band ligation surgery, and the control group underwent an artificial damage technique. Clinical magnetic resonance imaging(MRI) and histopathological evaluation were performed on the 38 th d and 48 th d after surgery in both groups, respectively. RESULTS There were no significant differences between the experimental group and the control group in general characteristics such as body weight, gender, and the number of fistula(P > 0.05). In the experimental group, 15 fistulas were confirmed clinically, 13 complex fistulas were confirmed by MRI, and 11 complex fistulas were confirmed by histopathology. The success rate in the porcine complex fistula model establishment was 83.33%. Among the 18 fistulas in the control group, 5 fistulas were confirmed clinically, 4 complex fistulas were confirmed by MRI, and 3 fistulas were confirmed by histopathology. The success rate in the porcine fistula model establishment was 27.78%. Thus, the success rate of the rubber band ligation group was significantly higher than the control group(P < 0.05). CONCLUSION Rubber band ligation is a stable and reliable method to establish complex fistula-in-ano models. Large animal models of complex anal fistulas can be used for the diagnosis and treatment of anal fistulas.

关键词： Complex fistula-in-ano Animal model Fistulas

Biodegradation of pendimethalin by Bacillus subtilis Y3

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Journal of Environmental Sciences 2016年第3期28卷 121-127页

作者： Haiyan Ni Li Yao Na Li Qin Cao chen Dai jun Zhang Qin He Jian He Key Laboratory of Microbiological Engineering of Agricultural Environment Ministry of AgricultureLife Sciences College of Nanjing AgriculturalUniuersityNanjing 210095China China national Center.for Biotechnology Development Beijing 100039China College of Life Sciences Laboratory centre of Life SciencesNanjing Agricultural UniversityNanjing 210095China Key Laboratory of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River Ministry of AgricultureCollege of Resourcesand Environmental SciencesNanjing Agricultural UniversityNanjing 210095China

A bacterium strain Y3,capable of efficiently degrading pendimethalin,was isolated from activated sludge and identified as Bacillus subtilis according to its phenotypic features and 16 S rRNA phylogenetic *** strain could grow on pendimethalin as a sole carbon source and degrade 99.5%of 100 mg/L pendimethalin within 2.5 days in batch liquid culture,demonstrating a greater efficiency than any other reported *** metabolic products,6-aminopendimethalin,5-amino-2-methyl-3-nitroso-4-（pentan-3-ylamino） benzoic acid,and 8-amino-2-ethyl-5-（hydroxymethyl）-1,2-dihydroquinoxaline-6-carboxylic acid,were identified by HPLC-MS/MS,and a new microbial degradation pathway was proposed.A nitroreductase catalyzing nitroreduction of pendimethalin to 6-aminopendimethalin was detected in the cell lysate of strain *** cofactor was nicotinamide adenine dinucleotide phosphate（NADPH） or more preferably nicotinamide adenine dinucleotide（NADH）.The optimal temperature and pH for the nitroreductase were 30℃ and 7.5,***^（2＋）,Ni^（2＋）,Pb^（2＋）,Co^（2＋）,Mn^（2＋） Cu^（2＋）,Ag~＋,and EDTA severely inhibited the nitroreductase activity,whereas Fe^（2＋）,Mg^（2＋）,and Ca^（2＋） enhanced *** study provides an efficient pendimethalin-degrading microorganism and broadens the knowledge of the microbial degradation pathway of pendimethalin.

关键词： Pendimethalin Biodegradation Bacillus sp.Y3 Metabolic pathway Nitroreductase

Growth Dynamics and Optimal Harvesting Stage of Two Forage Maize Varieties

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Agricultural Sciences in China 2011年第2期10卷 220-227页

作者： FU Feng-ling GUO Chang-jun TANG Qi-ling LIU Jian LI Wan-chen Maize Research Institute Sichuan Agricultural UniversityYa＇an 625014P.R.China

SAUMZ 1 and SAUMZ 2 are two forage maize varieties reproduced by distant *** a randomized block experiment,their fresh forage yield and dry matter yield were investigated on the basis of growth period,leaf stage,and effective accumulated *** nutritional components were measured in a near infrared diffuse reflectance *** to the concept of forage grading index,a formula was constructed to calculate the total digestible *** investigated characters and indexes were adapted to suitable models of growth *** results showed that these two varieties have strong heterosis in fresh forage yield,dry matter yield,and total digestible *** growth dynamics were adapted to Logistic models described by general equation y=k/（1＋ae-bx）.The forage grading indexes of these two varieties were decreased linearly along with the increasing of their leaf *** stopping point of fast growing period of total digestible energy estimated on the basis of leaf stage was suggested to be used as optimal harvesting stage of forage *** optimal harvesting stage was estimated to be tasseling stage for SAUMZ 1 and 19.50-leaf stage for SAUMZ 2.

关键词： forage maize growth dynamics leaf stage optimal harvest stage total digestible energy

Effect of Planting Density and Fertilizer Application on Fiber Yield of Ramie (Boehmeria nivea)

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Journal of Integrative Agriculture 2012年第7期11卷 1199-1206页

作者： LIU Li-jun chen He-quan DAI Xiao-bing WANG Hui PENG Ding-xiang Key Laboratory of Huazhong Crop Physiology Ecology and ProductionMinistry of Agriculture/Huazhong Agricultural UniversityWuhan 430070P.R.China

As the most important cultural practices for ramie （Boehmeria nivea） production, the single effects of plant density and nitrogen （N）, phosphorus （P）, potassium （K） fertilization on yield are well documented. To achieve the high yield and quality of ramie fiber, it is principal to quantify the fertilizer dosage for ramie sustainable production. A central composite design （CCD） was adopted with three replications, for a two-year field experiment （2008-2009） in the Yangtze River Valley of China. The aim was to evaluate both the individual and combined effects of plant density and N, P, and K fertilization on yield and fiber quality. The effects of the four factors on yield and quality of ramie cultivar Huazhu 4 were tested. Then mathematical models of the relationship among the four factors affecting ramie production and quality were established and analyzed to optimize the four factors, and used to establish optimum cultivation methods for the elite cultivar suitable to this area of the Yangtze River Valley. Supplements of N （X2）, P 0（3） and K 0（4）, and the density （X0 with N （X2） interaction significantly influenced strength in tests of mature ramie. The influence on fiber yield in the two year tests by the four factors ranked as follows： X3〉X4〉X~〉X2. We established the optimization technique attaining yield of 2 600 kg ha-~ in the tests as following： density of 28 350-31 650 plants ha-1, and supplements of N, P and K of 363-387, 98.58-105.48 and 280.20- 319.8 kg ha-1, respectively. It was concluded that nitrogen mostly improved plant growth and fiber yield while potassium had discernible effects on fiber quality.

关键词： ramie central composite design fiber yield simulative optimization

Lacustrine Basin Fills in an Early Cretaceous Half-Graben, Jiuquan Basin, NW China: Controlling Factors and Implications for Source Rock Depositional Processes and Heterogeneity

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Journal of Earth Science 2019年第1期30卷 158-175页

作者： chengcheng Zhang Hua Wang Si chen junjie Yu Yuantao Liao Zongsheng Lu jun Wei Nanjing Center China Geological Survey Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences School of Earth Sciences China University of Geosciences PetroChina Yumen Oilfield Company

Studies on basin fills have provided significant insights into reservoir distribution and prediction in petroliferous basins, however, the effect of basin fills on source rock properties has been underexplored. This paper documents basin filling characteristics and their implications for depositional processes and heterogeneity of source rock in the Qingnan subsag of the Jiuquan Basin, by using subsurface geological data from recent hydrocarbon exploration efforts in this area. Drill core data reveals that the basin fill of the Qingnan subsag was dominated by fan delta-lacustrine systems, in which deposition of the fan deltas along the basin margin was mainly through gravity flows. The temporal and spatial evolution of the depositional systems indicates that the basin fill was characterized by a continuously retrogradational process, with decreasing extent of fan deltas in vertical succession. Weakening of tectonic activities and climate change from humid to semi-arid are interpreted to be the main control factors that were responsible for the retrogradational basin fill. The different depositional environments in the early stage and late stage of the retrogradational basin filling history resulted in the different depositional processes and properties of source rocks. This study suggests that source rock heterogeneity associated with basin fills in lacustrine basins should be considered in hydrocarbon exploration.

关键词： basin fills source rock depositional process rift basin Jiuquan Basin

Ground-layer Adaptive Optics for the 2.5 m Wide-field and High-resolution Solar Telescope

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Research in Astronomy and Astrophysics 2024年第3期24卷 224-236页

作者： Ying Yang Lan-Qiang Zhang Nan-Fei Yan Jin-Sheng Yang Zhen Li Teng-Fei Song xue-jun Rao Chang-Hui Rao Key Laboratory on Adaptive Optics Chinese Academy of SciencesChengdu 610209China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China School of Electronic Electrical and Communication Engineering of the University of Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of Modern A&A Ministry of EducationNanjing 210023China Yunnan Observatories Chinese Academy of SciencesKunming 650216.China

The 2.5 m wide-field and high-resolution solar telescope(WeHoST)is currently under developing for solar *** aims to achieve high-resolution observations over a super-wide field of view(FOV)of5′×5′,and a desired resolution of 0.3″.To meet the scientific requirements of WeHoST,the ground-layer adaptive optics(GLAO)with a specially designed wave front sensing system is as the primary *** introduce the GLAO configuration,particularly the wave front sensing *** analytic method,we simulate the performance of both classical AO and GLAO systems,optimize the wave front sensing system,and evaluate GLAO performance in terms of PSF uniformity and correction improvement across whole *** results indicate that,the classical AO will achieve diffraction-limited resolution;the suggested GLAO configuration will uniformly improve the seeing across the full 5′×5′FOV,reducing the FWHM across the axis FOV to less than0.3″(λ≥705 nm,r0≥11 cm),which is more than two times *** specially designed wave front sensor schedule offers new potential for WeHoST’s GLAO,particularly the multi-FOV GLAO and the flexibility to select the detected *** capabilities will significantly enhance the scientific output of the telescope.

关键词： instrumentation adaptive optics-instrumentation detectors-instrumentation high angular resolution-methods numerical-telescopes-Sun activity