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| 1 | 生物强化谷物铁营养状况评价及品种筛选显示文摘[目的]评价富铁生物强化小麦、玉米各品种对铁缺乏大鼠铁营养状况的改善情况,筛选出优良品种。[方法]用低铁半合成饲料进行大鼠血红蛋白耗竭试验。选取铁缺乏的大鼠,采用L16(24)正交设计方案,按照血红蛋白(Hb)并参考体重将其随机分为16组,每组4只,进行富铁生物强化小麦、玉米的补充试验。观察不同品种生物强化谷物对大鼠体重、Hb、铁蛋白(SF)、肝脏铁(LI)、血清铁(SI)的改善情况,分别计算各品种在各指标上的总效应。[结果]血红蛋白耗竭试验结束时大鼠的Hb值平均为(92.75±6.53)g/L,符合铁缺乏的诊断标准。补充试验前各组大鼠的体重和Hb差异无统计学意义。补充试验后各组大鼠的体重、Hb均增加,与其补充试验前的结果相比差异均有统计学意义(P<0.05)。小麦各品种中,中优9507(安阳)在Hb、SF、体重和SI上的总效应较高,京东8号在LI上的总效应最高,中麦9-509在Hb上的总效应最高,豫麦18的各指标总效应最低;玉米各品种中,中铁2号在Hb、SF、体重和SI上的总效应较高,中铁4号在SF和LI上的总效应最高,中铁3号在所有指标上的总效应居中,普通玉米各指标总效应最低。[结论]富铁生物强化小麦、玉米可以改善铁缺乏大鼠的铁营养状况。 | 岳向峰 张健 黄承钰 | 2008 | 现代预防医学2008，35，5： | 11 |
| 2 | Harvest and Postharvest Factors Affecting Bruise Damage of Fresh Fruits显示文摘Fresh fruits are susceptible to bruising, a common type of mechanical damage during harvest and at all stages of postharvest handling. In quest of developing and adoption of strategies to reduce bruise damage, it is of utmost importance to understand major factors influencing bruise susceptibility of fresh produce at these stages. This review presents a critical discussion of factors affecting bruising during harvest and postharvest handling of fresh fruits. Excessive compression forces during harvesting by handpicking or machines, and a series of impacts during harvesting, transport and packhouse operations can cause severe bruise damage. The review has further revealed that bruising is dependent on a number of other factors such as produce maturity, ripening, harvest time(during the day or season) and time lapse after harvest. The susceptibility to bruising is partly dependent on how these factors alter the produce physiological and biochemical properties, and the environmental conditions such as temperature, humidity and several other postharvest treatments. Hence, the successful applications of harvesting techniques by use of trained personnel and proper harvesting equipment are essential to reduce both the incidence and severity of bruising.Furthermore, the careful selection of postharvest handling temperature and other treatments can increase resistance of fresh produce to bruise damage. | Zaharan Hussein Olaniyi AFawole Umezuruike Linus Opara | 2020 | Horticultural Plant Journal2020，6，1： | 11 |
| 3 | Review of the biological and engineering aspects of algae to fuels approach显示文摘Current biofuel production relies on limited arable lands on the earth,and is impossible to meet the biofuel demands.Oil producing algae are alternative biofuel feedstock with potential to meet the world’s ambitious goal to replace fossil fuels.This review provides an overview of the biological and engineering aspects in the production and processing technologies and recent advances in research and development in the algae to fuels approach.The article covers biology,selection and genetic modification of algae species and strains,production systems design,culture media and light management,harvest and dewatering,downstream processing,and environment and economic assessment.Despite the many advances made over several decades,commercialization of algal fuels remains challenging chiefly because of the techno-economic constraints.Technological breakthroughs in all major aspects must take place before commercial production of algal fuels becomes economically viable. | Paul Chen Min Min Yifeng Chen Liang Wang Yecong Li Qin Chen Chenguang Wang Yiqin Wan Xiaoquan Wang Yanling Cheng Shaobo Deng Kevin Hennessy Xiangyang Lin Yuhuan Liu Yingkuan Wang Blanca Martinez Roger Ruan | 2009 | International Journal of Agricultural and Biological Engineering2009，2，4： | 9 |
| 4 | Prediction of wheat moisture content at harvest time through ANN and SVR modeling techniques显示文摘The grain moisture content at harvest time is a key factor that limits harvesting windows.The present study aimed to develop a new methodology to predict wheat moisture content by using multi-layer perceptron(MLP)and support vector regression(SVR)techniques.Five input variables included the number of days after sowing,air temperature,air relative humidity,wind speed on an hourly basis,and precipitation on a 6-hour basis.The study area was Sari County located in the north of Iran.Data were collected from field experiments in two crop years(2016/17 and 2017/18).The results indicated that the developed MLP model outperformed the SVR model in determining wheat moisture content by R2 and RMSE value of 0.92 and 2.09%(wet basis)against 0.79 and 3.09%,respectively.In conclusion,the developed MLP model can be considered a useful method to estimate wheat moisture content at harvest time. | Shamsollah Abdollahpour Armaghan Kosari-Moghaddam Mohammad Bannayan | 2020 | Information Processing in Agriculture2020，7，4： | 3 |
| 5 | CLIMATE AND ITS EFFECT ON FOOD PRODUCTION DURING THE LITTLE ICE AGE IN GUANGDONG PROVINCE显示文摘Climatic change and its effect on food production are an urgent problem faced by all countries now and on. Historical data correlating climatic fluctuation and food production will shed much light on the consideration of future food problems. In this paper, an attempt has been made to study the climatic fluctuation during the Little Ice Age (1430—1850 AD) in Guangdong Province, and to discuss how it affected food production and caused cyclic fluctuation of famines and bumper harvests. | 郑斯中 | 1982 | Chinese Science Bulletin1982，27，10： | 3 |
| 6 | Organic thermoelectrics for green energy显示文摘INTRODUCTION Driven by the increasing demand for electricity,a burning desire in scientific fields is to harvest electricity from renewable energy using a green route.Thermoelectric materials can meet this requirement because their heat–electricity conversion ability not only enables direct energy harvesting from waste heat | Chong-an Di Wei Xu Daoben Zhu | 2016 | National Science Review2016，3，3： | 2 |
| 7 | Design of Wireless Energy-Harvested UHF WSN Tag for Cellular IoT显示文摘In this paper,a wireless energy-harvested ultra-high frequency(UHF)wireless sensor network(WSN)tag is designed and implemented for cellular Io T applications.The WSN tag is made up of a wireless energy harvesting circuit,a temperature sensing circuit,and a radio frequency identification(RFID)tag.The developed WSN tag is compatible with the ISO/IEC18000-6C protocol.The WSN tag can receive the GSM RF energy operating in China GSM900 and GSM1800 bands in the surrounding environment and the solar energy,then converts the RF energy to direct current(DC)by schottky diode-based rectifying circuit,and finally stores the DC energy in a supercapacitor through a DC-DC booster circuit.The DC-DC booster circuit drives the front-end circuit,TI MSP430 microcontroller,temperature sensing circuit,and other active circuits in the tag.The MSP430 works in low-power mode when it is powered up,and it can also reduce power consumption more by reducing main clock(MCLK)frequency according to different forward link rates.The implemented WSN tag demonstrated that the RF-to-DC conversion efficiency is higher than 39% when the receiving 900 MHz RF signal power is from -14 dBm to 0 dBm and could make the tag work normally.The signal receiving sensitivity of the WSN tag is up to-32 dBm at the rate of 40 kbit/s from the Reader to the WSN tag.The WSN tag supports Miller coding and extended Miller coding.This wireless energy harvested UHF WSN tag,compared with conventional UHF passive tags and battery-powered active UHF RFID Tags,has many advantages,such as far communication distance,long service life,and sensing functionality.It will have wide applications in the Internet of Things(IoT). | LI Gang XU Rui LI Zhenbing ZHOU Jie LI Jian WEN Guangjun | 2018 | ZTE Communications2018，16，1： | 2 |
| 8 | 一类考虑收获的Monod-Haldane型捕食系统的动力学行为(英文)显示文摘给出了一类考虑收获的Monod-Haldane型捕食者-食饵系统的平衡点和稳定性分析,及给出几类分支的分析,包括鞍结分支、Bogdanov-Takens分支、超临界和亚临界Hopf分支,最后给出了数值模拟例子验证了结论的正确性. | 饶凤 程相闯 | 2012 | 生物数学学报2012，27，1： | 2 |
| 9 | Review of smart robots for fruit and vegetable picking in agriculture显示文摘The fruit and vegetable picking has posed a great challenge on the production and markets during the harvest season.Manual picking cannot fully meet the rapid requirements of each market,mainly due to the high labor-intensive and time-consuming tasks,even the aging and shortage of agricultural labor force in recent years.Alternatively,smart robotics can be an efficient solution to increase the planting areas for the markets in combination with changes in cultivation,preservation,and processing technology.However,some improvements still need to be performed on these picking robots.To document the progress in and current status of this field,this study performed a bibliometric analysis.This analysis evaluated the current performance characteristics of various fruit and vegetable picking robots for better prospects in the future.Five perspectives were proposed covering the robotic arms,end effectors,vision systems,picking environments,and picking performance for the large-scale mechanized production of fruits and vegetables in modern agriculture.The current problems of fruit and vegetable picking robots were summarized.Finally,the outlook of the fruit and vegetable picking robots prospected from four aspects:structured environment for fruit planting,the algorithm of recognition and positioning,picking efficiency,and cost-saving picking robots.This study comprehensively assesses the current research status,thus helping researchers steer their projects or locate potential collaborators. | Zhiheng Wang Yi Xun Yingkuan Wang Qinghua Yang | 2022 | International Journal of Agricultural and Biological Engineering2022，15，1： | 2 |
| 10 | Can gene editing reduce postharvest waste and loss of fruit, vegetables, and ornamentals?显示文摘Postharvest waste and loss of horticultural crops exacerbates the agricultural problems facing humankind and will continue to do so in the next decade.Fruits and vegetables provide us with a vast spectrum of healthful nutrients,and along with ornamentals,enrich our lives with a wide array of pleasant sensory experiences.These commodities are,however,highly perishable.Approximately 33%of the produce that is harvested is never consumed since these products naturally have a short shelf-life,which leads to postharvest loss and waste.This loss,however,could be reduced by breeding new crops that retain desirable traits and accrue less damage over the course of long supply chains.New gene-editing tools promise the rapid and inexpensive production of new varieties of crops with enhanced traits more easily than was previously possible.Our aim in this review is to critically evaluate gene editing as a tool to modify the biological pathways that determine fruit,vegetable,and ornamental quality,especially after storage.We provide brief and accessible overviews of both the CRISPR-Cas9 method and the produce supply chain.Next,we survey the literature of the last 30 years,to catalog genes that control or regulate quality or senescence traits that are'ripe'for gene editing.Finally,we discuss barriers to implementing gene editing for postharvest,from the limitations of experimental methods to international policy.We conclude that in spite of the hurdles that remain,gene editing of produce and ornamentals will likely have a measurable impact on reducing postharvest loss and waste in the next 5-10 years. | Emma N.Shipman Jingwei Yu Jiaqi Zhou Karin Albornoz Diane M.Beckles | 2021 | Horticulture Research2021，8，1： | 2 |
| 11 | How do water depth and harvest intensity affect the growth and reproduction of Elodea nuttallii(Planch.)st.John?显示文摘Aims both high and low densities of macrophyte vegetation can impair its ecosystem service function.Harvesting is often applied to macrophyte vegetation to maintain an appropriate density.Vegetation harvesting has occasionally gone awry and caused catastrophes,such as vegetation disappearance and cyanobacterial dominance in waterways and lakes.because water depth influences macrophyte density at all life stages,the simultaneous influences of harvesting and water depth should be carefully examined.Thus,this study aims to quantify the effects of differently harvesting Elodea nuttal-lii on its growth and reproduction at different water depths in field experiments.Methods Four harvest intensities(harvesting E.nuttallii plant heights equal to 25%,50%,75%and 100%of the water depth)were applied to E.nuttallii growing at four different water depths(60,90,120 and 150 cm).Plant length and root length were measured.The node number,root number of each plant and number of floating plants were counted before harvesting.The harvested plant were dried to a constant weight for dry weight determination.Important Findings The rate of increase in the length and shoot number of E.nuttallii varied from−0.012 to 0.440 day^(−1) and from−0.020 to 0.639 day^(−1),respec-tively.Water depth>150 cm would limit E.nuttallii growth.Elodea nuttallii responded to increasing water depths and low-intensity har-vesting by increasing internodal length and decreasing shoot number.The larger internodal length of E.nuttallii observed in relatively deeper water was also induced by the physical strain generated by its buoy-ancy as its specific gravity was less than water’s.The physical mecha-nism of removing the plant canopy by harvesting decreased E.nuttallii buoyancy and prevented floating.Harvesting increased plant produc-tion in shallow waters<90 cm deep.moreover,it is also necessary to perform three medium-intensity harvests at a water depth of 120 cm and one low-intensity harvest or no harvesting at a water depth of 150 cm to achieve longer lifetimes and less biomass near the water surface when the plants reach or approach the water surface. | Weiwei Xu Weiping Hu Jiancai Deng Jinge Zhu Qinqin Li | 2016 | Journal of Plant Ecology2016，9，2： | 2 |
| 12 | Valuation of Rice Postharvest Losses in Sub-Saharan Africa and Its Mitigation Strategies显示文摘Data on rice harvest and postharvest loss in Sub-Sahara Africa(SSA)is scanty making it difficult for stakeholders to appreciate the loss and set priority areas for loss reduction along the value chain.To address this problem,a protocol was developed and validated for postharvest loss(PHL)quantification in SSA.Quantitative losses at each segment were determined by field measurements.Interactive effect of origin of rice(domestic versus imported)and type of processing(white versus parboiled milled)on rice price in 33 markets in Africa was used to estimate qualitative loss for both white and parboiled milled rice.Total PHL for rice in SSA in 2018 is estimated at about US$10.24 billion,representing 47.63%of the expected total production.The highest loss recorded was quantitative loss before and during harvesting,followed by qualitative loss along the entire value chain,quantitative loss during milling,parboiling,threshing in that order,with the lowest being quantitative loss during drying.Priority areas to be targeted for PHL reduction in SSA and some loss mitigation tools and technologies piloted or suitable for SSA are proposed. | Sali Atanga NDINDENG Alphonse CANDIA Delphine Lamare MAPIEMFU Vohangisoa RAKOTOMALALA Nahemiah DANBABA Kurahisha KULWA Paul HOUSSOU Sow MOHAMMED Ousman M.JARJU Salimata S.COULIBALY Elvis A.BAIDOO Jean MOREIRA Koichi FUTAKUCHI | 2021 | Rice science2021，28，3： | 1 |
| 13 | Optimization and field experiment of an adjustable device for sugar beet digger显示文摘The harvesting operation,which affects the energy consumption and application performance,usually determines the harvesting effect and production quality of the crop.An adjustable sugar beet excavation device was designed to put the excavation equipment into practice by reducing harvest loss.The device is composed of an excavation disc,hub,pedestal,threaded rod,adjustable nut,boom,mounting seat,leak proof disc,etc.Through theoretical analysis,it was found that the excavation disc and the adjustment mechanism,which determine the excavation space and loading condition of the device,are important to the excavation device.Key parameters of the excavation disc were selected according to the growth status of sugar beet and the requirements of excavation space,with 340 mm as the radius of the excavation disc and 7.5°as the edge angleθ.The adjustment mechanism parameters were selected to change the operating parameters(inclination angleβand deflection angleγ)easily.Through the theoretical and experimental preliminary research,the key components structure and parameters of the excavation device were determined.By Central Composite Design(CCD)method,the regression equation was established,with rotation angleα,opening angleεand excavation depth h as factors,and break rate,loss rate and excavation resistance as performance indexes.The influence of factors on performance indexes was estimated.The optimized parameter combination is:35.37°of rotation angle,15.08°of opening angle and 135.20 mm of the excavation depth.Experiments verified that the adjustable excavation device worked stably and achieved smooth excavation without congestion.The test indexes improved,with 0.6%of break rate,1.1%of loss rate and 2312.8 N of the excavation resistance.This satisfied the requirement for beet harvest quality,and is roughly consistent with the optimization result.The research results can provide reference for the research on mechanized harvesting technology and equipment of sugar beet. | Fangyan Wang | 2021 | International Journal of Agricultural and Biological Engineering2021，14，6： | 1 |
| 14 | Microalgae cultivation and culture medium recycling by a two-stage cultivation system显示文摘Nutrients and water play an important role in microalgae cultivation.Using wastewater as a culture medium is a promising alternative to recycle nutrients and water,and for further developing microalgae-based products.In the present study,two species of microalgae,Chlorella sp.(high ammonia nitrogen tolerance)and Spirulinaplatensis (S.platensis,high growth rate),were cultured by using poultry wastewater through a two-stage cultivation system for algal biomass production.Ultrafiltration (UF)or centrifuge was used to harvest Chlorella-sp.from the first cultivation stage and to recycle culture medium for S.platensis growth in the second cultivation stage.Results showed the two-stage cultiyation system produced high microalgae biomass including 0.39g·L^-1 Chlorella sp.and 3.45g·L^-1 S.platensis in the first-stage and second-stage,respectively.In addition,the removal efficiencies of NH4+reached 19% and almost 100% in the first and the second stage,respectively. Total phosphorus (TP)removal reached 17% and 83%,and total organic carbon (TOC)removal reached 55% and 72% in the first and the second stage,respectively.UF and centrifuge can reeycle 96.8% and 100% water,respectively.This study provides a new method for the combined of pure microalgae cultivation and wastewater treatment with eulture medium recycling. | Xinfeng Wang Lu Lin Haifeng Lu Zhidan Liu Na Duan Taili Dong Hua Xiao Baoming Li Pei Xu | 2018 | Frontiers of Environmental Science & Engineering2018，12，6： | 1 |
| 15 | 借鉴美国模式 破解中国生鲜O2O难题显示文摘解决生鲜电商O2O模式的瓶颈问题不是单纯的解决某一环节的问题,而是要解决从生产到销售、运输、加工整个产业链中各个环节的问题,依托网络平台实现产业链集成、协调发展,实现规模效应才能降低成本,形成成熟的商业模式。 | 王玉春 | 2015 | 中国农村科技2015，0，12： | 1 |
| 16 | ATTRACTING BEHAVIOR OF INSHORE-OFFSHORE FISHING MODEL WITH STAGE-STRUCTURE显示文摘This paper deals with fishing models with stage structure and harvest in an inshore-offshore area. By using the monotonic theory and concave operators to functional differential equations and the qualitative theory of differential equations, steady states of this dynamical systems representing fishery are derived, and their globally attracting behaviors are discussed. A brief biological meaning for the mathematical results is given. | 陆忠华 迟学斌 陈兰荪 | 2002 | Annals of Differential Equations2002，18，4： | 1 |
| 17 | 基于Harvest CM的软件配置管理显示文摘软件配置管理是软件开发中重要的管理环节,对提高软件质量和开发效率起着重要作用。在介绍软件配置管理基本概念后总结了采用HarvestCM进行软件配置管理的具体过程。 | 甘清云 | 2011 | 电脑知识与技术2011，7，11： | 1 |
| 18 | All-polymer solar cells显示文摘Organic solar cells(OSCs)show a promising commercialization prospect with their power conversion efficiencies(PCEs)exceeding 18%[1−6].Among various types of OSCs,all-polymer solar cells(all-PSCs)with a physical blend of p-and n-type polymer as the active layer to harvest solar irradiation attract growing attention due to their unique advantages like excellent morphological stability,and mechanical durability[7]. | Baoqi Wu Bingyan Yin Chunhui Duan Liming Ding | 2021 | Journal of Semiconductors2021，42，8： | 1 |
| 19 | Priorities for the development of alfalfa pasture in northern China显示文摘Alfalfa(Medicago sativa L.)is acclaimed as“Queen of forages”because of its great yield and high feeding value.China is the second biggest country in acreage of alfalfa cultivation,but the cultivation regions of alfalfa are distinguished by adverse climatic and edaphic conditions in northern China.Moreover,the lack of elite alfalfa varieties with great adaptation and poor field management are vital factors limiting development of alfalfa pasture in China.In addition,nutritional quality of alfalfa in China is also poor compared to that in countries of developed animal husbandry industrial.Here,we propose several priorities in terms of a comprehensive system of alfalfa breeding,field management,harvest and processing with Chinese characteristics,based on the theories and methodologies of breeding science,agronomy,plant physiology and agricultural machinery.Implementation of these priorities will greatly contribute to the sustainable development of the alfalfa pasture in China. | Tianzuo Wang Wen-Hao Zhang | 2023 | Fundamental Research2023，3，2： | 1 |
| 20 | DISCOVERY OF PHYCOBILIN IN GYMNODINIUM CYANEUM HU. Sp. Nov. AND ITS PHYLOGENETIC SIGNIFICANCE显示文摘In the photosynthetic system of the algae, although, all the speeies contain chlorophyll a, they differ greatly in the 'antenna' pigments with which the algal cells harvest light energy. Therefore, the investigation of the differences between the composition of various 'antenna' pigments has become one Of the most interesting subjects with respect to the phytogenetic taxonomy and the evolution of the algae. Phycobilins are the major photosynthetie 'antenna' pigments in some algae | 胡鸿钧 俞敏娟 张宪孔 | 1980 | Chinese Science Bulletin1980，25，10： | 0 |
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