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Study on the in situ desulfurization and viscosity reduction of heavy oil over MoO_(3)–ZrO_(2./HZSM-5 catalyst

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Petroleum Science 2023年第6期20卷 3887-3896页

作者： Rui-Qi liu li-Qiang Zhang {2.-Da Pan Yi-Ya Wang Jin-yu li xin-Wei Wang Zheng-Da Yang xin-Lu Han Ri-Yi lin College of New Energy Qingdao Engineering Research Center of Efficient and Clean Utilization of Fossil EnergyChina University of Petroleum(East China)Qingdao266580ShandongChina

Heavy oil is characterized by high *** viscosity makes it challenging to recover and ***-5,MoO_(3)/HZSM-5,ZrO_(2./HZSM-5 and MoO_(3)–ZrO_(2./HZSM-5 catalysts were developed to promote in situ desulfurization and viscosity reduction of heavy *** physical and chemical properties of catalysts were characterized by XPS,XRD,TEM,NH3-TPD,*** effects of temperature,catalyst type and addition amount on viscosity and composition of heavy oil were *** results showed that the presence of MoO_(3)–ZrO_(2./HZSM-5 nanoparticles during aquathermolysis could improve the oil quality by reducing the heavy *** reduced viscosity by 82.56%after the reaction at 2.0℃ and catalyst addition of 1 wt%.The contents of resins and asphaltic in the oil samples were 5.69%lower than that in the crude *** content decreased from 1.45%to 1.03%.The concentration of H2. produced by the reaction was 2.2. *** contents of sulfur-containing functional groups sulfoxide and sulfone sulfur in the oil samples decreased by 19.92.after the catalytic *** content of stable thiophene sulfur increased by 5.71%.This study provided a basis for understanding the mechanism of heavy oil desulfurization and viscosity reduction.

关键词： Heavy oil Hydrothermal cracking MoO_(3)-ZrO_(2./HZSM-5 catalyst Desulfurization Viscosity reduction

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水稻种质资源茎杆抗倒伏性状的评价与分析

西南农业学报 2024年第7期37卷 1442-1449页

作者：王泓超凌波陈小玲谢展文张玉婷李相宜梁莹莹程祖锌林荔辉福建农林大学作物遗传育种与综合利用教育部重点实验室福州350002 福建省特种作物育种与利用工程技术研究中心福州350002

[目的]抗倒伏是当前水稻育种的重要关注性状,评价种质资源抗倒伏特性对培育抗倒品种具有重要意义。[方法]以国内2.0份种质资源为材料,系统调查9个与水稻抗倒伏相关性状,采用形态学聚类及通径分析,评价上述种质资源抗倒伏性状的育种价值... 详细信息

[目的]抗倒伏是当前水稻育种的重要关注性状,评价种质资源抗倒伏特性对培育抗倒品种具有重要意义。[方法]以国内2.0份种质资源为材料,系统调查9个与水稻抗倒伏相关性状,采用形态学聚类及通径分析,评价上述种质资源抗倒伏性状的育种价值。[结果]以倒伏指数为标准,将供试材料分为高抗倒型、抗倒型和倒伏型3种类型,其中81.5%的种质资源具有较好的抗倒能力。不同抗倒类型种质资源的茎秆物理性状与倒伏指数相关系数存在明显差异。如恢复系等材料的株高、弯曲力矩和基部第2.长与倒伏指数呈极显著正相关,其中弯曲力矩与倒伏指数的相关系数最高,达0.789;而基部抗折力、鞘叶厚度与倒伏指数呈负相关,相关系数分别为-0.754^(**)和-0.659^(**)。不育系的株高和基部第2.长与倒伏指数呈极显著正相关,其中株高与倒伏指数的相关系数达0.681^(**);基部抗折力与倒伏指数相关系数为-0.841^(**)。通径分析表明,恢复系等材料的弯曲力矩对倒伏指数为直接正向效应(Py=0.519),不育系的株高对倒伏指数呈直接正向效应(Py=0.737),双亲基部抗折力对倒伏指数均呈直接负向效应,直接通径系数分别为-0.331和-0.702.[结论]水稻抗倒伏性状是一个复合性状,不同种质资源具有不同抗倒特性,科学利用育种资源是水稻抗倒伏育种的关键。

关键词：水稻种质资源抗倒伏性状聚类分析通径分析

Contrast-enhanced ultrasound as a valuable imaging modality for characterizing testicular lesions

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Asian Journal of Andrology 2022年第2期24卷 201-206页

作者： Jie yu xin-{2. Jiang lian-Fang Du Min Bai Zhao-Jun li Qiu-Sheng Shi Qi Jiang Fan li department of Ultrasound Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 201620China department of Medical Ultrasound Shanghai Baoshan Hospital of Integrated Traditional Chinese and Western MedicineShanghai 201999China department of Urology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China

Contrast-enhanced ultrasound(CEUS)is a new form of ultrasound(US)that can dynamically display microvessels in a highly sensitive *** purpose of this study was to investigate the efficacy of CEUS for characterizing testicular lesions in comparison with conventional ***-seven patients with testicular lesions were *** histopathology results revealed that 31 cases were neoplastic(11 cases of seminomas,8 nonseminomatous germ cell tumors,8 lymphomas,2.Leydig cell tumors,and 2.nonspecific tumors),and 16 cases were nonneoplastic(8 cases of infarctions,3 epidermoid cysts,and 5 inflammation).The indicators of shallow lobulated morphology and cystic-solid echogenicity on conventional US were suggestive of germ cell *** indicators on CEUS were found to be useful for characterizing testicular *** the neoplastic lesions showed hyperenhancement on ***,germ cell tumors presented with heterogeneous enhancement(73.7%,14/19),a twisted blood vessel pattern,rapid wash-in and wash-out,and peripheral rim hyperenhancement *** was characterized by nonbranching linear vessel patterns(87.5%,7/8),rapid wash-in and slow *** nonneoplastic lesions,infarction and epidermoid cysts showed no enhancement,and abscesses were observed with marginal irregular *** sensitivity,specificity,and accuracy of CEUS for differentiating between neoplastic and nonneoplastic lesions were 100%,93.8%,and 97.9%,respectively,and these values were higher than those for conventional US(90.3%,62.5%,and 80.9%,respectively).CEUS can sensitively reflect the microvascular perfusion in testicular lesions and offers high accuracy for characterizing them.

关键词： characterization contrast-enhanced ultrasound diagnosis testicular neoplasms ultrasound

Characterizing the luminescent properties of upconversion nanoparticles in single and densely packed state

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Journal of Innovative Optical Health Sciences 2019年第1期12卷 46-53页

作者： Xiaohu Chen Zhengyu Gui Yong liang {2. Jin Simin li Pengjiu Zhao Zhangsen yu Aiguo Wu Shoupeng liu hui li Jiangsu Key laboratory of Medical Optics CAS Center for Excellence in Molecular Cell Science Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Sciences Suzhou 215163P.R.China Key laboratory of Magnetic Materials and Devices&Functional Materials and Nanodevices Ningbo Institute of Material Technology&Engineering Chinese Academy of Sciences Ningbo 3152.1 P.R.China Tianjin Guoke Medical Engineering and Technology Development Co. Ltd.Tianjin 300399P.R.China Jiangsu Shuguang Opto-Electronics Co. Ltd.Yangzhou 225009P.R.China

Luminescent properties of Er^(3+)-and Yb^(3+)-co-doped CaF_(2.upconversion nanoparticles(UCNPs)were investigated in single particle and densely-packed states with a custom-built *** single UCNPs exhibit linear dependency of luminescent intensity on excitation power while the densely-packed UCNPs exhibit a 2.order power law-dependency indicating a two-photon absorption ***-domain luminescence intensity measurements were performed and the curves were fitted to excitationnemission rate functions based on a simplified three-state *** results indicate that the intermediates in single particles are much less and saturated in a short time,and there are strong couplings of the ground states and intermediate states between neighboring UCNPs in densely packed UCNPs.

关键词： Upconversion nanoparticles single particles luminescence lifetime rate function

A simulation study of field plate termination in Ga2.3 Schottky barrier diodes

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Chinese Physics B 2018年第12期27卷 455-460页

作者： hui Wang ling-li Jiang xin-Peng lin Si-Qi Lei Hong-yu yu department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China School of Electronic Science and Engineering Southeast UniversityNanjing 210096China Shenzhen Key laboratory of The Third Generation Semiconductor Shenzhen 518055China Guangdong GaN Devices Engineering and Technical Research Center Shenzhen 518055China

In this work, the field plate termination is studied for Ga2.3Schottky barrier diodes(SBDs) by simulation. The influence of field plate overlap, dielectric material and thickness on the termination electric field distribution are *** is found that the optimal thickness increases with reverse bias increasing for all the three dielectrics of SiO2. Al2.3, and HfO2. As the thickness increases, the maximum electric field intensity decreases in SiO2.nd Al2.3, but increases in ***, it is found that SiO2.nd HfO2.re suitable for the 600 V rate Ga2.3SBD, and Al2.3is suitable for both600 V and 12.0 V rate Ga2.3SBD. In addition, the comparison of Ga2.3SBDs between the SiC and GaN counterpart reveals that for Ga2.3, the breakdown voltage bottleneck is the dielectric. While, for SiC and GaN, the bottleneck is mainly the semiconductor itself.

关键词： Ga_2._3 Schottky barrier diode field plate termination technique

Combined laparoscopic-endoscopic approach for gastric glomus tumor:A case report

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World Journal of Clinical Cases 2021年第24期9卷 7181-7188页

作者： Wen-Hao Wang Ting-Ting Shen Zhi-xing Gao xin Zhang Zhao-{2. Zhai yu-li li Clinical Medical College Weifang Medical UniversityWeifang 261042Shandong ProvinceChina department of Gastroenterology Affiliated Hospital of Weifang Medical UniversityWeifang 261042Shandong ProvinceChina The Plastic Surgery Hospital of Weifang University Weifang Medical UniversityWeifang 261042Shandong ProvinceChina Plastic Surgery Institute of Weifang Medical University Yuhe Campus of Weifang Medical UniversityWeifang 261042Shandong ProvinceChina

BACKGROUND Gastric glomus tumor(GGT)is rare submucosal mesenchymal tumor that lacks specific clinical manifestations and is usually treated mainly by traditional surgical *** paper presents a case of a GGT,exhibited both intraluminally and extraluminally growth that was removed by laparoscopy-gastroscopy cooperative *** SUMMARY A 52.year-old male presented with epigastric discomfort accompanied by a sense of fullness for 3 *** gastrointestinal endoscopy identified a submucosal lump located in the gastric *** ultrasonography identified a 2.4 cm×1.8 cm lump located in the gastric *** originated from the muscularis propria and exhibited both intraluminally and extraluminally growth,with hypoechoicity on the periphery,hyperechoicity in the middle,and unclear *** tomography showed nodular thickening of 3.0 cm×2.2.cm in the gastric wall of the gastric antrum,and after enhancement,the lesion exhibited obvious enhancement We suspected that it was a gastrointestinal stromal tumor(glomus tumor and schwannoma were not excluded)and planned to perform laparoscopy-gastroscopy cooperative *** staining after the operation revealed that spinal muscular atrophy(+),hcaldesmon(+),cluster of differentiation 34(CD34)(+),2.Ki-67-positive rate,CD56,melanoma antigen,CD117,discovered on GIST-1,leukocyte common antigen,caudal type homeobox 2.cytokeratin,and S-100 were all *** tumor was finally diagnosed as a *** GGTs are rare submucosal tumors of the stomach and should be considered in the differential diagnosis of gastric submucosal ***-gastroscopy cooperative surgery is less invasive and more precise and could be an effective method for the treatment of GGTs.

关键词： Gastric glomus tumor Laparoscopy Gastroscopy Immunohistochemical staining Operation method Case report

Genome-wide identification of abscisic acid(ABA) receptor pyrabactin resistance 1-like protein(PYL) family members and expression analysis of PYL genes in response to different concentrations of ABA stress in Glycyrrhiza uralensis

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Chinese Journal of Natural Medicines 2020年第8期18卷 606-611页

作者： CUI Ying-Xian XU Zhi-Chao CHEN xin-lian NIE li-Ping WU li-Wei WANG yu SONG Jing-yuan YAO hui Key Lab of Chinese Medicine Resources Conservation State Administration of Traditional Chinese Medicine of the People’s Republic of ChinaInstitute of Medicinal Plant DevelopmentChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100193China Engineering Research Center of Chinese Medicine Resources Ministry of EducationBeijing 100193China

As abscisic acid(ABA)receptor,the pyrabactin resistance 1-like(PYR/PYL)protein(named PYL for simplicity)plays an important part to unveil the signal transduction of ABA and its regulatory *** uralensis,a drought-tolerant medicinal plant,is a good model for the mechanism analysis of ABA response and active compound ***,knowledge about PYL family in *** remains largely ***,10 PYLs were identified in *** *** analysis indicated that PYLs in ***(Gu PYLs)are relatively *** analysis showed that Gu PYL1-3 belongs to subfamily I,Gu PYL4-6 and Gu PYL10 belong to subfamily II and Gu PYL7-9 belongs to subfamily *** addition,transcriptome data presented various expression levels of Gu PYLs under different exogenous ABA *** expression pattern of Gu PYLs was verified by Quantitative real-time polymerase chain reaction(q RT-PCR).The study proved that Gu PYL4,Gu PYL5,Gu PYL8 and Gu PYL9 genes are significantly up-regulated by ABA stress and the response process is *** study paves the way for elucidating the regulation mechanism of ABA signal to secondary metabolites and improving the cultivation and quality of *** using agricultural strategies.

关键词： Glycyrrhiza uralensis Abscisic acid Pyrabactin resistance 1-like(PYR/PYL)protein family Gene expression Signaling pathway Stress responses

Novel and favorable genomic regions for spike related traits in a wheat germplasm Pubing 3504 with high grain number per spike under varying environments

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Journal of Integrative Agriculture 2017年第11期16卷 2386-2401页

作者： CHEN Dan WU Xiao-yang WU Kuo ZHANG Jin-peng liU Wei-hua YANG xin-ming li Xiu-quan LU yu-qing li li-hui National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural Sciences Biotechnology and Germplasm Resources Institute Yunnan Academy of Agricultural Sciences/Key Laboratory of Southwestern Crop Gene Resources and Germplasm InnovationMinistry of Agriculture/Scientific Observation for Rice Germplasm Resources of YunnanMinistry of Agriculture/Yunnan Provincial Key Laboratory of Agricultural Biotechnology

Grain number per spike （GNPS） is a major factor in wheat yield breeding. A new wheat germplasm Pubing 3504 shows superior features in spike traits. To elucidate the genetic basis of spike and yield related traits in Pubing 3504, 2.2.F2.3 families were generated from the cross Pubing 3504xJing 4839, and seven spike and yield related traits, including GNPS, spike length （SL）, kernel number per spikelet （KPS）, spikelet number per spike （SNS）, thousand-grain weight （TGW）, spike number per plant （SNP）, and plant height （HT） were investigated. Correlation analysis indicated significant positive correlations between GNPS and spike-related traits, including KPS, SNS, and SL, especially KPS. A genetic map was constructed using 190 polymorphic simple sequence repeat （SSR）, expressed sequence tag （EST）-SSR, and sequence- tagged-site （STS） markers. For the seven traits measured, a total of 37 quantitative trait loci （QTLs） in a single-environment analysis and 2. QTLs in a joint-environment analysis were detected. Additive effects of 70.3% （in a single environment） and 57.6% （in a joint environment） of the QTLs were positively contributed by Pubing 3504 alleles. Five important genomic regions on chromosomes 1A, 4A, 4B, 2., and 4D could be stably detected in different environments. Among these regions, the marker interval Xmag834-Xbarc83 on the short arm of chromosome 1A was a novel important genomic region that included QTLs controlling GNPS, KPS, SNS, TGW, and SNP with stable environmental repeatability. This genomic region can improve the spike trait and may play a key role in improving wheat yield in the future. We deduced that this genomic region was vital to the high GNPS of Pubing 3504.

关键词： wheat high GNPS germplasm QTL mapping genomic region

Discussion of 90°stopband in low-energy superconducting linear accelerators

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Nuclear Science and Techniques 2022年第9期33卷 137-147页

作者： xin-Miao Wan Xue-Jiang Pu Zhi-Qiang Ren Wei-Hong Huang yu-Fei Yang Zhi-{2. li The Key laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610065China

Superconducting linear accelerators(SCL)have a high acceleration gradient and are capable of operating in a high-duty factor *** high-power and high-intensity SCL,the design of beam dynamics generally follows the principle that the zero-current periodic phase advance(σ0)of each degree of freedom is less than 90°to avoid envelope instability caused by space ***,this principle is obtained under the condition of a completely periodic focusing channel,and it is ambiguous for pseudoperiodic structures,such as linear *** transverse beam dynamics without acceleration have been studied by other researchers,it appears that there are some connections between pure 2. and 3D beam *** on these two points,five focusing schemes for the solenoid and quadrupole doublet channels were designed to simulate the beam behavior with non-constantσ*** them,the four schemes follow the characteristics of variation in the zero-current longitudinal phase advance(σ0l)under a constant acceleration gradient and synchronous *** zero-current transverse phase advance(σ0t)is consistent withσ0l,based on the equipartition *** initialσ0twas set to 12.°,110°,100°,and 90°,and was then gradually decreased to approximately 40°at the end of the *** last scheme maintains the maximumσ0tof88°by reducing the acceleration gradient of the corresponding cavities,until the point at whichσ0tequals88°with a normal *** the stopbands obtained from the linearized envelope equations and multiparticle particle-in-cell(PIC)simulations,the transport properties of both continuous and 3D-bunched beams with the acceleration of the five focusing schemes were *** was found that for a CW beam,when tune depression>0.7,σ0tcan break through 90°when the beams were transported in both solenoid and quadrupole doublet periodic focusing *** tune depression<0.7,the conclusions were *** the solenoid focusing system,σ0tcan partially

关键词： Proton beam Superconducting linear accelerators Envelope instability Periodic focusing structure Resonance