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Impacts of the COVID-19 pandemic on rural poverty and policy responses in China

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Journal of Integrative Agriculture 2020年第12期19卷 2946-2964页

作者： LUO ren-fu liu Cheng-fang GAO jing-jing WANG Tian-yi ZHI Hua-yong SHI Peng-fei HUANG ji-kun China Center for Agricultural Policy School of Advanced Agriculture SciencesPeking UniversityBeijing 100871P.R.China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

Given the sudden outbreak of the COVID-19 pandemic,a timely study on the impacts of and policy response to the pandemic on rural poverty in China is critically important because China has aimed to completely eradicate extreme poverty by the end of *** paper uses data from the latest round of a nationally representative household panel survey to examine the impacts of the pandemic on rural poverty in *** data show that 11.9%of sample households were ever officially registered as poor households between 2013 and 2019,and this poverty incidence fell to 2.7%by the end of *** the middle February of 2020,23%of the households who have graduated from poverty since 2013 perceived that they would fall back into poverty due to the *** those never poor households,7.1%perceived that they would possibly fall into poverty due to the *** from both descriptive and multivariate analyses consistently show the interruptions that the pandemic caused in off-farm employment is an important channel that led households to perceive of falling back into or falling into *** also find households in the bottom four quintiles when ranked in terms of household income per capita are much more likely to perceive themselves of falling back into or falling into poverty during this pandemic than those in the richest ***,our results show that the education and age of household heads,as well as being from Hubei Province matter in explaining household perception about falling back into or falling into poverty in some cases but not *** paper concludes with a set of policy responses that China has taken to mitigate the impact of COVID-19 pandemic on poverty alleviation.

关键词： COVID-19 pandemic perception poverty rural households China

Suitability of the DNDC model to simulate yield production and nitrogen uptake for maize and soybean intercropping in the North China Plain

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Journal of Integrative Agriculture 2018年第12期17卷 2790-2801页

作者： ZHANG yi-tao liu jian WANG Hong-yuan LEI Qiu-liang liu Hong-bin ZHAI Li-mei ren Tian-zhi ZHANG ji-zong Key Laboratory of Non-point Source Pollution Control Ministry of Agriculture Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Earth Systems Research Center Institute for the Study of Earth Oceans and Space University of New Hampshire School of Environment and Sustainability Global Institute for Water Security University of Saskatchewan Agro-Environmental Protection Institute Ministry of Agriculture

Intercropping is an important agronomic practice. However, assessment of intercropping systems using field experiments is often limited by time and cost. In this study, the suitability of using the DeNitrification DeComposition(DNDC) model to simulate intercropping of maize(Zea mays L.) and soybean(Glycine max L.) and its aftereffect on the succeeding wheat(Triticum aestivum L.) crop was tested in the North China Plain. First, the model was calibrated and corroborated to simulate crop yield and nitrogen(N) uptake based on a field experiment with a typical double cropping system. With a wheat crop in winter, the experiment included five treatments in summer: maize monoculture, soybean monoculture, intercropping of maize and soybean with no N topdressing to maize(N0), intercropping of maize and soybean with 75 kg N ha–1topdressing to maize(N75), and intercropping of maize and soybean with 180 kg N ha–1topdressing to maize(N180). All treatments had 45 kg N ha–1as basal fertilizer. After calibration and corroboration, DNDC was used to simulate long-term(1955 to 2012) treatment effects on yield. Results showed that DNDC could stringently capture the yield and N uptake of the intercropping system under all N management scenarios, though it tended to underestimate wheat yield and N uptake under N0 and N75. Long-term simulation results showed that N75 led to the highest maize and soybean yields per unit planting area among all treatments, increasing maize yield by 59% and soybean yield by 24%, resulting in a land utilization rate 42% higher than monoculture. The results suggest a high potential to promote soybean production by intercropping soybean with maize in the North China Plain, which will help to meet the large national demand for soybean.

关键词： maize intercropping with soybean DNDC topdressing N yield N uptake

Parameter uncertainty modeling of safety instrumented systems

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Petroleum Science 2021年第6期18卷 1813-1828页

作者： Bao-Ping Cai Wen-Chao Li Yong-Hong liu Yan-Ping Zhang yi Zhao Xiang-Di Kong Zeng-Kai liu ren-jie ji Qiang Feng College of Mechanical and Electronic Engineering China University of PetroleumQingdao266580ShandongChina School of Reliability and Systems Engineering Beihang UniversityBeijing100191China

In this study,a novel safety integrity level(SIL)determination methodology of safety instrumented systems(SISs)with parameter uncertainty is proposed by combining multistage dynamic Bayesian networks(DBNs)and Monte Carlo simulation.A multistage DBN model for SIL determination with multiple redundant cells is *** models of function inspection test interval and function inspection test stages are alternately connected to form the multistage *** redundant cells can have different M out of N voting system *** automatic modeling of conditional probability between nodes is *** SIL determination of SISs with parameter uncertainty is constructed by using the multistage DBNs and Monte Carlo simulation.A high-pressure SIS in the export of oil wellplatform is adopted to demonstrate the application of the proposed *** SIL and availability of the SIS and its subsystems are *** influence of single subsystem on the SIL and availability of the SIS is *** influence of single redundant element on the SIL and availability of the subsystem is analyzed.A user-friendly SIL determination software with parameter uncertainty is developed on MATLAB graphical user interface.

关键词： Safety integrity level Dynamic Bayesian network Monte Carlo Parameter uncertainty

海州湾及邻近海域金乌贼的空间分布特征及其与环境因子的关系

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水生生物学报 2024年第4期48卷 617-624页

作者：姜月张云雷逄志伟纪毓鹏徐宾铎张崇良任一平薛莹中国海洋大学水产学院青岛266003 国家海洋环境监测中心大连116023 日照市岚山区海洋与渔业监督监察大队日照276800 海州湾渔业生态系统教育部野外科学观测研究站青岛266003

研究根据2013—2020年在海州湾及其邻近海域进行的渔业资源和栖息环境综合调查数据,采用支持向量机(Support vector machine,SVM)模型,通过交叉验证,结合赤池信息准则(Akaike information criterion,AIC)等评判指标,构建了金乌贼(Sepia ... 详细信息

研究根据2013—2020年在海州湾及其邻近海域进行的渔业资源和栖息环境综合调查数据,采用支持向量机(Support vector machine,SVM)模型,通过交叉验证,结合赤池信息准则(Akaike information criterion,AIC)等评判指标,构建了金乌贼(Sepia esculenta)的空间分布模型,并分析环境因子对其空间分布的影响,旨在探究海州湾金乌贼的空间分布特征及其与环境因子的关系。结果表明,水深对金乌贼空间分布的影响最大,底层盐度次之,其次是底层水温和离岸距离。金乌贼的相对资源密度随水深的增大呈现先升高后降低的趋势,随盐度的升高而增大,随底层水温的升高而减小。在海州湾水深约27 m,离岸距离约40 km的海域,金乌贼的相对资源密度较高,其分布格局呈现出在东部和中北部海域丰度高,而西南部近岸海域丰度低的特点。研究将有助于深入了解海州湾金乌贼的空间分布规律,为其资源的合理利用和科学养护提供参考依据。

关键词：海州湾支持向量机模型空间分布环境因子金乌贼

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UHPLC-MS/MS法测定不同周期蒙药文冠木枝和叶中8个成分的对比研究

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药物分析杂志 2024年第9期44卷 1497-1503页

作者：布仁满达吴杰斯敖敦格日乐黄格尔柱拉胡阿荣其日格尔拉喜那木吉拉内蒙古民族大学国家药监局中药(蒙药)质量控制重点实验室通辽028000 内蒙古民族大学附属医院通辽028000

目的:建立UHPLC-MS/MS测定方法测定蒙药文冠木枝和叶中儿茶素、表没食子儿茶素、芦丁、槲皮苷、表儿茶素、二氢杨梅素、杨梅苷和二氢槲皮素的不同周期含量对比研究。方法:采用WATER-SCORTECS反相C_(18)(100 mm×2.1 mm;1.6μm)色谱柱,以... 详细信息

目的:建立UHPLC-MS/MS测定方法测定蒙药文冠木枝和叶中儿茶素、表没食子儿茶素、芦丁、槲皮苷、表儿茶素、二氢杨梅素、杨梅苷和二氢槲皮素的不同周期含量对比研究。方法:采用WATER-SCORTECS反相C_(18)(100 mm×2.1 mm;1.6μm)色谱柱,以0.1%甲酸水溶液为流动相A,乙腈为流动相B,梯度洗脱(0~1 min,5%B;1~10 min,5%B→28%B;10~11 min,28%B→95%B;11~14 min,95%B;14~15 min,95%B→5%B),柱温40℃,流速0.3 mL·min^(-1),进样体积2μL,多反应监测(MRM)方法中选择负离子进行检测。结果:在测定的浓度范围内8个化学成分线性关系良好(r>0.9976),精密度、重复性和稳定性良好,平均加样回收率为97.4%~106.0%,RSD≤5.0%。6批叶样品中8个成分测定结果分别为0.090~0.904 mg·g^(-1)、0.093~2.258 mg·g^(-1)、0.001~0.005 mg·g^(-1)、0.530~6.176 mg·g^(-1)、0.158~1.561 mg·g^(-1)、0.002~0.056 mg·g^(-1)、4.008~10.218 mg·g^(-1)和1.049~16.990 mg·g^(-1),枝中8个成分测定结果分别为0.384~1.025 mg·g^(-1)、0.911~2.427 mg·g^(-1)、0.008~0.127 mg·g^(-1)、0.870~2.295 mg·g^(-1)、0.659~1.746 mg·g^(-1)、0.125~1.079 mg·g^(-1)、2.296~4.681 mg·g^(-1)和1.958~4.946 mg·g^(-1)。含量测定结果显示8个成分在文冠木不同部位中的含量存在较大差异,叶中杨梅苷、芦丁、槲皮苷随生长周期变化明显,可作为文冠木叶质量控制的主要指标。结论:该方法准确度和灵敏度高,且稳定性和重复性好,适用于蒙药文冠木药材中8个成分的同时检测,为枝和叶的质量控制提供实验基础。

关键词：文冠木枝和叶化学成分定量分析超高效液相串联质谱多反应监测

Injectable hydrogel made from antler mesenchyme matrix for regenerative wound healing via creating a fetal-like niche

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World Journal of Stem Cells 2023年第7期15卷 768-780页

作者： Guo-Kun Zhang jing ren ji-Ping Li dong-Xu Wang Sheng-Nan Wang Li-Yan Shi Chun-yi Li Institute of Antler Science and Product Technology Changchun Sci-Tech UniversityChangchun 130600Jilin ProvinceChina College of Chinese Medicinal Materials Jilin Agricultural UniversityChangchun 130118Jilin ProvinceChina China-Japan Union Hospital Jilin UniversityChangchun 130033Jilin ProvinceChina

BACKGROUND Scar formation and loss of cutaneous appendages are the greatest challenges in cutaneous wound *** studies have indicated that antler reserve mesenchyme(RM)cells and their conditioned medium improved regenerative wound healing with partial recovery of cutaneous *** To develop hydrogels from the antler RM matrix(HARM)and evaluate the effect on wound *** We prepared the hydrogels from the HARM via enzymatic solubilization with *** we investigated the therapeutic effects of HARM on a full-thickness cutaneous wound healing rat model using both local injections surrounding the wound and topical wound *** The results showed that HARM accelerated wound healing rate and reduced scar ***,HARM stimulated the regeneration of cutaneous appendages and blood vessels,and reduced collagen fiber *** study showed that these functions might be achieved via creating a fetal-like niche at the wound *** levels of fetal wound healing-related genes,including Collagen III and TGFβ3 treated with HARM were all increased,while the expression levels of Collagen I,TGFβ1,and Engrailed 1 were decreased in the ***,the number of stem cells was increased in the fetal-like niche created by HARM,which may contribute to the regeneration of cutaneous *** Overall,we successfully developed an injectable hydrogel made from antler RM matrix for the regenerative repair of full-thickness cutaneous *** uncovered the molecular mechanism of the hydrogels in promoting regenerative wound healing,and thus pave the way for HARM to be developed for the clinic use.

关键词： Hydrogel Antler reserve mesenchyme Regenerative wound healing Fetal-like niche

Effects of Ginkgo biloba extract EGb761 on neural differentiation of stem cells offer new hope for neurological disease treatment

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Neural Regeneration Research 2019年第7期14卷 1152-1157页

作者： Chao ren Yong-Qiang ji Hong liu Zhe Wang jia-Hui Wang Cai-yi Zhang Li-Na Guan Pei-Yuan yin Department of Neurology and Suzhou Clinical Research Center of Neurological Disease the Second Affiliated Hospital of Soochow University Department of Neurology Affiliated Yantai Yuhuangding Hospital of Qingdao University Department of Nephrology Affiliated Yantai Yuhuangding Hospital of Qingdao University Department of Clinical Laboratory Affiliated Yantai Yuhuangding Hospital of Qingdao University Department of Central Laboratory Affiliated Yantai Yuhuangding Hospital of Qingdao University Department of Emergency and Rescue Medicine Xuzhou Medical University Department of Neurosurgical Intensive Care Unit the Affiliated Yantai Yuhuangding Hospital of Qingdao University Department of Blood Supply Yantai Center Blood Station

Stem cell transplantation has brought new hope for the treatment of neurological *** key to stem cell therapy lies in inducing the specific differentiation of stem cells into nerve *** the differentiation of stem cells in vitro and in vivo is affected by multiple factors,the final differentiation outcome is strongly associated with the microenvironment in which the stem cells are ***,the optimal microenvironment for inducing stem cell differentiation is a hot ***761 is extracted from the leaves of the Ginkgo biloba *** is used worldwide and is becoming one of the focuses of stem cell *** have shown that EGb761 can antagonize oxygen free radicals,stabilize cell membranes,promote neurogenesis and synaptogenesis,increase the level of brain-derived neurotrophic factors,and replicate the environment required during the differentiation of stem cells into nerve *** offers the possibility of using EGb761 to induce the differentiation of stem cells,facilitating stem cell *** provide a comprehensive reference for the future application of EGb761 in stem cell therapy,we reviewed studies investigating the influence of EGb761 on stem *** started with the composition and neuropharmacology of EGb761,and eventually led to the finding that EGb761 and some of its important components play important roles in the differentiation of stem cells and the protection of a beneficial microenvironment for stem cell transplantation.

关键词： nerve regeneration Ginkgo biloba extract Ginkgolide B traditional Chinese medicine stem cells induction of differentiation stem cell transplantation synaptic plasticity pharmacological effect neurological diseases nervous systems neural regeneration

The Pythium periplocum elicitin PpEli2 confers broad-spectrum disease resistance by triggering a novel receptor-dependent immune pathway in plants

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Horticulture Research 2023年第2期10卷 41-52页

作者： Kun Yang yi Wang jialu Li Yaxin Du ying Zhai dong Liang Danyu Shen Rui ji Xuexiang ren Hao Peng Maofeng jing Daolong Dou Key Laboratory of Biological Interaction and Crop Health Department of Plant PathologyNanjing Agricultural UniversityNanjing 210095China Department of Plant Pathology Washington State UniversityPullmanWA 99164USA Institute of Plant Protection Jiangsu Academy of Agricultural SciencesNanjing 210014China Institute of Plant Protection and Agro-Products Safety Anhui Academy of Agricultural SciencesHefei 230001China Academy for Advanced Interdisciplinary Studies Nanjing Agricultural UniversityNanjing 210095China

Elicitins are microbe-associated molecular patterns produced by oomycetes to elicit plant *** is still unclear whether elicitins derived from non-pathogenic oomycetes can be used as bioactive molecules for disease ***,for the first time we identify and characterize an elicitin named PpEli2 from the soil-borne oomycete Pythium periplocum,which is a non-pathogenic mycoparasite colonizing the root ecosystem of diverse plant *** by a novel cell surface receptor-like protein,REli,that is conserved in various plants(***,pepper,soybean),PpEli2 can induce hypersensitive response cell death and an immunity response in Nicotiana ***,PpEli2 enhances the interaction between REli and its co-receptor *** receptor-dependent immune response triggered by PpEli2 is able to protect various plant species against Phytophthora and fungal ***,our work reveals the potential agricultural application of non-pathogenic elicitins and their receptors in conferring broad-spectrum resistance for plant protection.

关键词： elicitin soybean soil

内脏脂肪组织对胃癌患者术前T分期准确性的影响

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中国CT和MRI杂志 2024年第9期22卷 134-136页

作者：侯越峰刘慧慧任毅楠王吉卢保华中国人民解放军中部战区空军医院普通外科中国人民解放军中部战区空军医院超声特诊科山西大同037006

目的探讨内脏脂肪组织(visceral adipose tissue,VAT)对胃癌临床T分期(clinical T,cT)准确性的影响。方法回顾性分析2020年1月至2023年6月在我院行胃癌切除术治疗患者资料。以术后病理结果为参考,根据cT和病理T分期(pathological T,pT)... 详细信息

目的探讨内脏脂肪组织(visceral adipose tissue,VAT)对胃癌临床T分期(clinical T,cT)准确性的影响。方法回顾性分析2020年1月至2023年6月在我院行胃癌切除术治疗患者资料。以术后病理结果为参考,根据cT和病理T分期(pathological T,pT)一致程度,将患者分为cT诊断准确组和cT诊断错误组。比较两组患者的临床、病理特征及L2/L3水平VAT。使用多因素Logistic回归分析分析影响cT分期准确性的独立因素,并构建判断cT分期准确性的列线图。结果共纳入455例胃癌患者,355例(78.02%)术前cT分期准确,100例(21.98%)术前cT分期不准确。cT分期与pT分期间的ICC分析一致性为0.881(95%CI:0.691-0.774)。VAT预测术前cT分期准确的最佳临界值为97.8cm2。多因素Logistic回归分析显示,肿瘤位置(相对于贲门位置,胃体OR=2.921,P=0.003、胃窦OR=1.754,P=0.026)、肿瘤直径>3.8 cm(OR=1.253,P97.8 cm2)(OR=5.962,P<0.001)是影响术前cT准确性的独立危险因素。列线图预测胃癌术前cT分期模型的准确性较高,C-index为0.826(95%CI=0.786-0.876)。结论VAT、胃癌肿瘤位置、肿瘤大小是影响术前cT分期准确性的独立影响因素,本研究构建的预测cT分期准确性列线图具有较高准确性,具有一定应用前景。

关键词：胃癌内脏脂肪含量 T分期

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