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Effects of drying process of Yuanzhi (Radix Palygalae) on its bioactive ingredients

Journal of Traditional Chinese Medicine 2014年第2期34卷 206-213页

作者： Yingli Wang Yani Li yuying zhao Liping Chang Department ofTraditional Chinese Pharmacology Shanxi University of Traditional Chinese Medicine Key Laboratory of Coal Science and Technology Taiyuan University of Technology Department of Traditional Chinese Pharmacology Shanxi University of Traditional Chinese Medicine Institute of Chemical and Biological Technology Taiyuan University of Science and Technology

OBJECTIVE： To study the effects of the drying processing in terms operational parameters on the bio- active constituents of six YuanzhJ （Radix Palygalae） samples across China. METHODS： Six Yuanzhi （Radix Palygalae） samples were investigated using thermogravimetry analysis. The heating courses were set in two ways： the temperature-programmed process from room temperature to 150℃ ,and the constant-temperature course at 50℃, 70℃ and 90℃. RESULTS： The peak temperature of six Yuanzhi （Radix Palygalae） samples ranged from 78℃ to 88℃. The mass loss rate of Yuanzhi （Radix Palygalae） alcohol-soluble extract was significantly increased when heated at 90℃. Four types of bioactive ingredients were detected in volatile oils of Yuanzhi （Radix Palygalae） sample from Shanxi province by Gas Chromatography-mass spectrometry analysis. Fourier Transform Infrared Spectroscopy results showed that the drying temperature exerted a great influence on types and amount of ingredients of Yuanzhi （Radix Palygalae）. The kinetic study showed that the constant-temperature drying process of Yuanzhi Radix Palygalae） samples could be well de- scribed by the Page Model, especially for the drying process at 50~C, in which R2 and SD values were more than 0.98 and less than 0.04, *** drying constant k of three Yuanzhi （Radix Palygalae） samples from Shanxi, Gansu and Shaanxi provinces in China was corresponding to the Arrhenius equation, and their activation energies were 28.07, 2.5.38 and 21.48 kJ/mol, respectively. CONCLUSION： The drying process of Yuanzhi （Radix Palygalae） was very important for bioactive ingredients improvement in Yuanzhi （Radix Palygalae）. Temperature was a thermodynamic property significantly affecting the process.

关键词： Yuanzhi (Radix Palygalae) Chromatography, supercritical fluid Drying process Thermogravimetric analysis Alcohol soluble extract Bioactive ingredients

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Lignin‐derived carbon with pyridine N‐B doping and a nanosandwich structure for high and stable lithium storage

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Carbon Energy 2024年第8期6卷 232-247页

作者： Dichao Wu Jiayuan Li yuying zhao Ao Wang Gaoyue Zhang Jianchun Jiang Mengmeng Fan Kang Sun Key Lab of Biomass Energy and Material Jiangsu ProvinceNational Engineering Lab for Biomass Chemical UtilizationKey and Open Lab on Forest Chemical EngineeringSFAInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjingChina Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjingChina School of Energy and Environment Southeast UniversityNanjingChina Department of Chemistry Tsinghua UniversityBeijingChina Fujian Provincial Key Laboratory of Biomass Low‐Carbon Conversion Academy of Advanced Carbon Conversion TechnologyHuaqiao UniversityXiamenChina Chinese Academy of Sciences Xinjiang Lihua Institute of Technology UrumqiChina

Biomass‐derived carbon is a promising electrode material in energy storage ***,how to improve its low capacity and stability,and slow diffusion kinetics during lithium storage remains a *** this research,we propose a“self‐assembly‐template”method to prepare B,N codoped porous carbon(BN‐C)with a nanosandwich structure and abundant pyridinic N‐B *** nanosandwich structure can increase powder density and cycle stability by constructing a stable solid electrolyte interphase film,shortening the Li^(+) diffusion pathway,and accommodating volume expansion during repeated charging/*** abundant pyridinic N‐B species can simultaneously promote the adsorption/desorption of Li^(+)/PF_(6)^(−) and reduce the diffusion *** BN‐C electrode showed a high lithium‐ion storage capacity of above 1140 mAh g^(−1) at 0.05 A g^(−1) and superior stability(96.5% retained after 2000 cycles).Moreover,owing to the synergistic effect of the nanosandwich structure and pyridinic N‐B species,the assembled symmetrical BN‐C//BN‐C full cell shows a high energy density of 234.7Wh kg^(−1),high power density of 39.38 kW kg−1,and excellent cycling stability,superior to most of the other cells reported in the *** the density functional theory simulation demonstrated,pyridinic N‐B shows enhanced adsorption activity for Li^(+) and PF_(6)^(−),which promotes an increase in the capacity of the anode and cathode,***,the relatively lower diffusion barrier of pyridinic N‐B promotes Li^(+) migration,resulting in good rate ***,this study provides a new approach for the synergistic modulation of a nanostructure and an active site simultaneously to fabricate the carbon electrode material in energy storage devices.

关键词： high cycling stability high energy density lithium‐ion batteries pyridinic N‐B species sandwich structure carbon nanosheet

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GENERATION OF STIMULATED EMISSION BY VISIBLE MULTIPHOTON DISSOCIATION OF PbCl_(2) MOLECULES

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Chinese Physics Letters 1989年第5期6卷 197-200页

作者： CHENG Bingying zhao Lizeng ZHANG Daozhong YANG Yongwu zhao yuying Institute of Physics Academia SinicaBeijing

Stimulated emission was generated at the 722.9nm line of neutral lead atoms by multiphoton dissociation of PbCl_(2) molecules with a DPS dye ***-Stokes Raman scattering around *** was also *** effects of the heat-pipe oven temperature and pump laser energy on the *** radiation was *** energy conversion efficiency of the 722.9nm laser is about 5%.It provides a way for frequency conversion by multiphoton dissociation of simple molecules with a visible laser.

关键词： dissociation neutral visible

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Fabricating pyridinic N-B sites in porous carbon as efficient metal-free electrocatalyst in conversion CO_(2)into CH_(4)

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Chinese Chemical Letters 2023年第8期34卷 291-295页

作者： yuying zhao Qixin Yuan Mengmeng Fan Ao Wang Kang Sun Zeming Wang Jianchun Jiang Institute of Chemical Industry of Forest Products Chinese Academy of ForestryKey Lab.of Biomass Energy and MaterialJiangsu ProvinceNational Engineering Lab for Biomass Chemical UtilizationNanjing 210042China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Institute of Nanochemistry and Nanobiology School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China

Electrochemical reduction of CO_(2)(CO_(2)RR)to value-added chemicals is an attractive strategy for greenhouse gas mitigation and carbon *** material is one of most promising electrocatalysts but its product selectivity is limited by few modulating approaches for active ***,the predominant pyridinic N-B sites(accounting for 80%to all N species)are fabricated in hierarchically porous structure of graphene nanoribbons/amorphous *** graphene nanoribbons and porous structure can accelerate electron and ion/gas transport during CO_(2)RR,*** carbon electrocatalyst exhibits excellent selectivity toward CO_(2)reduction to CH_(4)with the faradaic efficiency of 68%at−0.50 V *** demonstrated by density functional theory,a proper adsorbed energy of∗CO and∗CH_(2)O are generated on the pyridinic N-B site resulting into high CH_(4)***,this study provides a novel method to modulate active sites of carbon-based electrocatalyst to obtain high CH_(4)selectivity.

关键词： Carbon-based electrocatalyst Porous carbon Pyridinic N-B CO_(2)reduction CH_(4)selectivity

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Electrochemical Biorefinery toward Chemicals Synthesis and Bio-Oil Upgrading from Lignin

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Engineering 2023年第8期27卷 178-198页

作者： Rui Hu yuying zhao Chen Tang Yan Shi Gang Luo Jiajun Fan James H.Clark Shicheng Zhang Shanghai Technical Service Platform for Pollution Control and Resource Utilization of Organic Wastes Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3)Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Circa Renewable Chemistry Institute Green Chemistry Center of ExcellenceDepartment of ChemistryUniversity of YorkYork YO105DDUK

Recalcitrance and the inherent heterogeneity of lignin structure are the major bottlenecks to impede the popularization of lignin-based chemicals production *** works suggested a promising pathway for lignin depolymerization and lignin-derived bio-oil upgrading via an electrochemical biorefinery(a process in which lignin valorization is performed via electrochemical oxidation or reduction).This review presents the progress on chemicals synthesis and bio-oil upgrading from lignin by an electrochemical biorefinery,relating to the lignin biosynthesis pathway,reaction pathway of lignin electrochemical conversion,inner-sphere and outer-sphere electron transfer mechanism,basic kinetics and thermodynamics in electrochemistry,and the recent embodiments analysis with the emphasis on the respective feature and limitation for lignin electrochemical oxidative and reductive ***,the challenge and perspective associated with lignin electrochemical biorefinery are ***-day results indicate that more work should be performed to promote efficiency,selectivity,and stability in pursuing a lignin electrochemical *** of the most promising developing directions appears to be integrating various types of lignin electrochemical conversion strategies and other existing or evolving lignin valorization *** review aims to provide more references and discussion on the development for lignin electrochemical biorefinery.

关键词： Lignin Electrochemical biorefinery Reaction pathway Electron transfer mechanism Kinetics Thermodynamics

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The ecological response of natural phytoplankton population and related metabolic rates to future ocean acidification

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Journal of Oceanology and Limnology 2022年第3期40卷 999-1011页

作者： Haijiao LIU yuying zhao Chao WU Wenzhe XU Xiaodong ZHANG Guicheng ZHANG Satheeswaran THANGARAJ Jun SUN Research Centre for Indian Ocean Ecosystem Tianjin University of Science and TechnologyTianjin 300457China College of Marine Science and Technology China University of Geosciences(Wuhan)Wuhan 430074China Department of Marine Science Incheon National UniversityIncheon 22012Republic of Korea

Ocean acidifi cation(OA)and global warming-induced water column stratification can signifi cantly alter phytoplankton-related biological activity in the marine *** how these changes may play out in the tropical Indian Ocean remains *** study investigated the ecological and metabolic responses of the different phytoplankton functional groups to elevated CO_(2) partial pressure and nitrate deficiency in two different environments of the eastern Indian Ocean(EIO).It is revealed that phytoplankton growth and metabolic rates are more sensitive to inorganic nutrients rather than CO_(2).The combined interactive effects of OA and N-limitation on phytoplankton populations are functional *** particular,the abundance and calcification rate of calcifying coccolithophores are expected to be enhanced in the future *** underlying mechanisms for this enhancement may be ascribed to coccolithophore’s lower carbon concentrating mechanisms(CCMs)efficiency and OA-induced[HCO^(-)_(3)]*** comparison,the abundance of non-calcifying microphytoplankton(e.g.,diatoms and dinoflagellates)and primary productivity would be inhibited under those *** erent from previous laboratory experiments,interspecifi c competition for resources would be an important consideration in the natural phytoplankton *** combined factors would roughly determine calcifying coccolithophores as“winners”and non-calcifying microphytoplankton as“losers”in the future ocean *** to the large species-specific differences in phytoplankton sensitivity to OA,comprehensive investigations on oceanic phytoplankton communities are essential to precisely predict phytoplankton ecophysiological response to ocean acidification.

关键词： natural phytoplankton community ocean acidification coccolithophore calcification primary productivity eastern Indian Ocean

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Risk factors of recurrence in small-sized, node negative breast cancer in young women: a retrospective study in Chinese population

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Science China(Life Sciences) 2013年第4期56卷 335-340页

作者： ZHANG XiaoSan LI PengFei MA WenJie DI WenYu zhao Shu GAO QingZu zhao yuying YANG MaoPeng ZHANG QingYuan Department of Medical Oncology the Third Affiliated Hospital of Harbin Medical University Department of Radiology the Third Affiliated Hospital of Harbin Medical University Department of Pathology the First Affiliated Hospital of Xin Xiang Medical College Department of Medical Oncology the Fourth Affiliated Hospital of Harbin Medical University

We aimed to investigate risk factors of local and distant recurrence in small-sized, node negative breast cancer in women 〈35 years in a Chinese cohort. Between January 1994 and January 2007, 107 patients with pathologically confirmed small-sized （E1 cm）, node negative breast cancer who did not receive neoadjuvant or adjuvant chemotherapy were included. The 5-year recurrence-free survival （RFS） was estimated according to different prognostic variables. With a median time of 60 months （range, 8-60 months） follow-up, local and distant recurrence were observed in 25 cases （23.4%）. By univariate analysis, HER-2 positivity, triple negative （TN）, and high Ki-67 index （~14%） were risk factors of a lower RFS （hazard ratio （HR） 6.680, 95% confidence interval （CI） 2.350-18.985, P〈0.0001 for HER-2 positive; HR 4.769, 95%CI 1.559-14.591, P=0.006 for TN; HR 6.030, 95%CI 2.659-13.674, P〈0.0001 for high Ki-67 index）. Patients with grade 3 tumors had a lower RFS （HR 2.922, 95%CI 1.096-7.791, P=0.032） compared with those with grade 1 or grade 2 tumors. By multivariate analysis, HER-2 positivity （HR 10.204, 95%CI 3.391-30.704, P〈0.0001）, TN （HR 10.521, 95% CI 3.152-35.113, P〈0.0001） and high Ki-67 index （HR 10.820, 95%CI 4.338-27.002, P〈0.0001） remained risk factors of RFS. In this cohort, HER-2 positivity, triple neg- ative and high Ki-67 index were independent risk factors of RFS in young patients with Tla,bN0 breast cancer. Subsequent pregnancy did not affect RFS.

关键词： breast cancer recurrence-free survival risk factors young women

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Zero-Shot Medical Image Retrieval for Emerging Infectious Diseases Based on Meta-Transfer Learning--Worldwide,2020

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China CDC weekly 2020年第52期2卷 1004-1008页

作者： yuying zhao Hanjiang Lai Jian Yin Yewu Zhang Shigui Yang Zhongwei Jia Jiaqi Ma School of Computer Science and Engineering Sun Yat-Sen UniversityGuangzhouGuangdongChina Center for Public Health Surveillance and Information Service Chinese Center for Disease Control and PreventionBeijingChina State Key Laboratory for Diagnosis and Treatment of Infectious Diseases Collaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesThe First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhouZhejiangChina School of Public Health Peking UniversityBeijingChina

Introduction:Due to the increasing number of medical images,image retrieval has become an important technique for medical image *** many content-based image retrieval methods have been proposed,the retrieval of images in datasets related to emerging/new infectious diseases still remain a challenge-mostly due to the lack of historical *** a result,the current retrieval models have limited functionality in helping doctors make accurate diagnoses of new ***:In this paper,we propose a zero-shot retrieval model based on meta-learning and ensemble learning,which can obtain a model with stronger generalizability without using any relevant training data,and thus performs well on new types of test ***:The experimental results showed that the proposed method is 3% to 5% higher than the traditional method,which means that our model can retrieve relevant medical images more accurately for newly emerging data types and provide doctors with more effective ***:When a new infectious disease occurs,doctors can use the proposed zero-shot retrieval model to retrieve all relevant cases,quickly find the common problems of patients,find the locations of the new infections,and determine its infectivity as soon as *** proposed method is a new computeraided decision support technology for emerging infectious diseases.

关键词： Image image retrieval

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Research on Improving the Effectiveness of College Students'Theme Education Practice in the New Media Era

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Journal of Contemporary Educational Research 2021年第3期5卷 75-78页

作者： yuying zhao Harbin Institute of Finance Harbin 150030Heilongjiang ProvinceChina

Carrying out theme education practice is an important measure of Ideological and political *** goal and content of theme education activities are generally overlapped with other activities,which makes the school unable to bear the burden of carrying out multiple activities at the same time,thus affecting the actual effect of theme education practice *** this paper,by improving the method of theme education,and with a positive attitude and innovative spirit to continue to innovate the working mode of theme education practice,the way of using new media technology in the process of theme education is analyzed,and its characteristics and laws are analyzed,so as to improve the effective working path of theme education.

关键词： New media era Theme education Effec-tiveness

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Porous heterostructure of graphene/hexagonal boron nitride as an efficient electrocatalyst for hydrogen peroxide generation

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Carbon Energy 2023年第5期5卷 138-151页

作者： Mengmeng Fan Zeming Wang yuying zhao Qixin Yuan Jian Cui Jithu Raj Kang Sun Ao Wang Jingjie Wu Hao Sun Bei Li Liang Wang Jianchun Jiang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjingChina Key Lab of Biomass Energy and Material Jiangsu ProvinceJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjingChina School of Environmental and Chemical Engineering Institute of Nanochemistry and NanobiologyShanghai UniversityShanghaiChina Chemicobiology and Functional Materials Institute Nanjing University of Science and TechnologyNanjingChina Department of Chemical and Environmental Engineering University of CincinnatiCincinnatiOhioUSA

Compared with the traditional heteroatom doping,employing heterostructure is a new modulating approach for carbon-based ***,a facile ball milling-assisted route is proposed to synthesize porous carbon materials composed of abundant graphene/hexagonal boron nitride(G/h-BN)*** Ni powder and nanoscale h-BN sheets are used as a catalytic substrate/hard template and“nucleation seed”for the formation of the heterostructure,***-prepared G/h-BN heterostructures exhibit enhanced electrocatalytic activity toward H_(2)O_(2) generation with 86%-95%selectivity at the range of 0.45-0.75 V versus reversible hydrogen electrode(RHE)and a positive onset potential of 0.79 versus RHE(defined at a ring current density of 0.3 mA cm^(-2))in the alkaline *** a flow cell,G/h-BN heterostructured electrocatalyst has a H_(2)O_(2) production rate of up to 762 mmol g_(catalyst)^(-1) h^(-1) and Faradaic efficiency of over 75%during 12 h testing,superior to the reported carbon-based *** density functional theory simulation suggests that the B atoms at the interface of the G/h-BN heterostructure are the key active *** research provides a new route to activate carbon catalysts toward highly active and selective O_(2)-to-H_(2)O_(2) conversion.

关键词： efficient electrocatalyst graphene H_(2)O_(2)generation hexagonal boron nitride porous heterostructure

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