检索结果-南通市图书馆

A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2024年第5期23卷 1718-1736页

作者： Xiaoyun Wang yajie Tian Qianhui Zhang Zhengxin zhao Rui Wang Huanjie Cai Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education Northwest A&F UniversityYangling712100China College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100China

The combined effects of straw incorporation(SI)and polymer-coated urea(PCU)application on soil ammonia(NH_(3))and nitrous oxide(N_(2)O)emissions from agricultural fields have not been comprehensively evaluated in Northwest China.We conducted a two-year field experiment to assess the effects of combining SI with either uncoated urea(U)or PCU on soil NH_(3)emissions,N_(2)O emissions,winter wheat yields,yield-scaled NH_(3)(/NH_(3)),and yield-scaled N_(2)O(/N_(2)O).Five treatments were investigated,no nitrogen(N)fertilizer(N_(0)),U application at 150 kg N ha-1 with and without SI(SI+U and S_(0)+U),and PCU application at 150 kg N ha^(-1) with and without SI(SI+PCU and S_(0)+PCU).The results showed that the NH_(3);emissions increased by 20.98-34.35%following Sl compared to straw removal,mainly due to increases in soil ammonium(NH_(4)^(+)-N)content and water-flled pore space(WFPS).SI resulted in higher N_(2)O emissions than under the So scenario by 13.31-49.23%due to increases in soil inorganic N(SIN)contents,WFPS,and soil microbial biomass.In contrast,the PCU application reduced the SIN contents compared to the U application,reducing the NH_(3)and N_(2)O emissions by 45.99-58.07 and 18.08-53.04%,respectively.Moreover,no significant positive effects of the SI or PCU applications on the winter wheat yield were observed.The lowest /NH_(3) and /N_(2)O values were observed under the S_(0)+PCU and SI+PCU treatments.Our results suggest that single PCU applications and their combination with straw are the optimal agricultural strategies for mitigating gaseous N emissions and maintaining optimal winter wheat yields in Northwest China.

关键词： straw incorporation polymer-coated urea NH_(3)and N_(2)O emissions winter wheat yields

Longitudinal changes in body weight of breastfeeding mothers in the first year after delivery and its relationship with human milk composition:a combined longitudinal and cross-sectional cohort study

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第1期13卷 254-264页

作者： Huijuan Ruan yajie Zhang Qingya Tang Xuan zhao Xuelin zhao Yi Xiang Wei Geng Yi Feng Wei Cai Department of Clinical Nutrition Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition Shanghai Institute of Pediatric ResearchShanghai 200092China Department of Pediatric Surgery Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China

Objective:Postpartum weight retention(PPWR)is a common problem among women after childbirth.The main objectives of this study are to understand the changes in body weight of breastfeeding mothers during long-term follow-up and preliminarily explore the relationship between maternal body weight and human milk composition,including macronutrients,leptin,and adiponectin.Methods:The study included a longitudinal cohort(122 mothers),and a cross-sectional cohort(37 mothers).The human milk,maternal weight,and dietary surveys were collected in the longitudinal cohort at different follow-up time points(1-14 days postpartum,2-4 months postpartum,5-7 months postpartum,and 12-17 months postpartum).The maternal body weight was analyzed using the responses in the survey questionnaires.A milk analyzer based on the mid-infrared spectroscopy(MIRS)was used to determine milk composition,and nutrition analysis software evaluated dietary intakes.In the cross-sectional cohort,participating mothers were asked to provide blood and human milk samples and pertinent information related to maternal body composition.Maternal body composition was measured by bioelectrical impedance analysis(BIA),while ELISA analyzed leptin and adiponectin in milk and serum.Results:At 5-7 months postpartum,the PPWR of breastfeeding mothers was(2.46±3.59)kg.At 12-17 months postpartum,the PPWR was(0.98±4.06)kg.PPWR was found to be negatively correlated with milk fat content within 14 days postpartum and positively correlated at 2-4 months postpartum.In addition,the maternal weight and body muscle mass were positively correlated with leptin and adiponectin in milk.Plasma leptin was positively correlated with the mother’s body weight,body mass index(BMI),FAT percentage,and body fat mass,while plasma adiponectin did not correlate with any parameter.The results also indicate that the PPWR did not correlate with leptin and adiponectin in plasma or milk.Conclusions:Breastfeeding mothers may retain considerable weight gain one year after delivery.Human milk composition

关键词： Human milk Milk composition Body weight Body mass index(BMI) Weight gain Postpartum weight retention

CRISPR/CasΦ2-mediated gene editing in wheat and rye

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第4期66卷 638-641页

作者： Sanzeng zhao Xueying Han Yachen Zhu Yuwei Han Huiyun Liu Zhen Chen Huifang Li Dan Wang Chaofan Tian Yuting Yuan yajie Guo Xiaomin Si Daowen Wang Xiang Ji State Key Laboratory of Wheat and Maize Crop Science and Center for Crop Genome EngineeringCollege of AgronomyHenan Agricultural UniversityZhengzhou 450046China Collaborative Innovation Center of Henan Grain Crops College of AgronomyHenan Agricultural UniversityZhengzhou 450046China State Key Laboratory of Crop Stress Adaptation and Improvement College of AgronomyHenan UniversityKaifeng 475004China The Shennong Laboratory Zhengzhou 450002China

The recent advancements in developing the CRISPR/Cas9 system and various derivative tools(e.g.,base editors)have accelerated basic plant science research and crop improvement by creating multiple types of genetic vari... 详细信息

关键词： CRISPR/Cas9 CRISPR/Cas

Elastic properties of Fe-bearing Akimotoite at mantle conditions: Implications for composition and temperature in lower mantle transition zone

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2022年第4期2卷 570-577页

作者： yajie zhao Zhongqing Wu Shangqin Hao Wenzhong Wang Xin Deng Jian Song Laboratory of Seismic and Physics of Earth's Interior School of Earth and Space SciencesUniversity of Seience and Technology of ChinaHefei 230026China National Geophysical Observatory at Mengcheng University of Science and Technology of ChinaHefeiChina CAS Center for Excllence in Comparative Planetology UsTcHefei 230026China Institute of Geophysics and Planetary Physics Scripps Institution of OeanographyUniversiy of California San DiegoLa Jolla 92092CAUSA Departnent of Earth Sciences University CollegeLondonLondon WCIE6BTUnited Kingdom Earth and Planets Laboratory Carnegie Instution for ScienceWashingtonDC 20015UsA

The pyrolite model,which can reproduce the upper-mantle seismic velocity and density profiles,was suggested to have significantly lower velocities and density than seismic models in the lower mantle transition zone(MTZ).This argument has been taken as mineral-physics evidence for a compositionally distinct lower MTz.However,previous studies only estimated the pyrolite velocities and density along a one-dimension(1D)geotherm and never considered the effect of lateral temperature heterogeneity.Because the majorite-perovskite-akimotoite triple point is close to the normal mantle geotherm in the lower MTz,the lateral low-temperature anomaly can result in the presence of a significant fraction of akimotoite in pyrolitic lower MTZ.In this study,we reported the elastic properties of Fe-bearing akimotoite based on first-principles calculations.Combining with literature data,we found that the seismic velocities and density of the pyrolite model can match well those in the lower MTZ when the lateral temperature heterogeneity is modeled by a Gaussian distribution with a standard deviation of~10o K and an average temperature of dozens of K higher than the triple point of MgsiOg.We suggest that a harzburgite-rich lower MTZ is not required and the whole mantle convection is expected to be more favorable globally.

关键词： Akimotoite Pyrolite Elasticmoduli Temperature heterogeneity Gaussian distribution

Highly crystalline core dominated the catalytic performance of carbon dot for cyclohexane to adipic acid reaction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第8期15卷 7662-7669页

作者： Xiao Wang Wenyi Bian Tianyang Zhang yajie zhao Mingwang Shao Haiping Lin Yang Liu Hui Huang Zhenhui Kang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

Carbon dots(CDs)have uniquely structural,physicochemical and photochemical properties,suggesting a promising platform for catalysis applications.The in-depth understanding of the structure-activity relationship in the CDs-based catalyst system needs to know the effect of the crystalline core on their catalytic performance.The efficient catalytic oxidation of cyclohexane is an urgent challenge in current chemical industry,in which,adipic acid(AA)plays an important role in industry for synthesis of nylon6 and nylon-66.Here,we fabricated the pristine CDs by electrochemical etching graphite rod method and derived CDs with high crystalline core(CD-600,CD-800,and CD-1100)through a thermal treatment method in tube furnace.Furthermore,these CDs performed an outstanding catalytic performance for one-step synthesis of AA from cyclohexane.With the help of machine learning(ML),the deep correlations between features(structures of CDs,catalytic conditions)and catalytic performances were investigated by XGBoost(XGB)model.Then under the optimization and prediction of XGB,it was found that high crystalline core preceded the other features and CD-1100 could get the best conversion of 30.696%and selectivity to AA of 92.52%at reaction conditions of 130℃,1.5 MPa,and 10 h.This work pioneered the application of ML in industrial issues and demonstrated a comprehensive understanding on CDs as catalyst to realize one-step synthesis of AA.

关键词： adipic acid carbon dots machine learning catalytic performances crystalline core

Highly efficient metal-free catalyst from cellulose for hydrogen peroxide photoproduction instructed by machine learning and transient photovoltage technology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第5期15卷 4000-4007页

作者： Yan Liu Xiao Wang yajie zhao Qingyao Wu Haodong Nie Honglin Si Hui Huang Yang Liu Mingwang Shao Zhenhui Kang Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipaMacao 999078China

Great attention has been paid to green procedures and technologies for the design of environmental catalytic systems.Biomassderived catalysts represent one of the greener alternatives for green catalysis.Photocatalytic production of hydrogen peroxide(H_(2)O_(2))from O_(2) and H_(2)O is an ideal green way and has attracted widespread attention.Here,we show a metal-free photocatalyst from cellulose,which has a high photocatalytic activity for the photoproduction of H_(2)O_(2) with the reaction rate up to 2,093μmol/(h·g)and the apparent quantum efficiency of 2.33%.Importantly,a machine learning model was constructed to guide the synthesis of this metal-free photocatalyst.With the help of transient photovoltage(TPV)tests,we optimized their fabrication and catalytic activity,and clearly showed that the formation of carbon dots(CDs)facilitates the generation,separation,and transfer of photo-induced charges on the catalyst surface.This work provides a green way for the highly efficient metal-free photocatalyst design and study from biomass materials with the machine learning and TPV technology.

关键词： cellulose carbon dots hydrogen peroxide machine learning transient photovoltage metal-free photocatalyst

Distribution and invasion of Spartina alterniflora within the Jiaozhou Bay monitored by remote sensing image

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2022年第6期41卷 31-40页

作者： Jianbu Wang zhaoyang Lin Yuanqing Ma Guangbo Ren Zijun Xu Xiukai Song Yi Ma Andong Wang yajie zhao Laboratory of Marine Physics and Remote Sensing First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China School of Information and Electrics Beijing Institute of TechnologyBeijing 100081China Shandong Marine Resources and Environment Research Institute Shandong Provincial Key Laboratory of Restoration for Marine EcologyYantai 264006China North China Sea Environmental Monitoring Center State Oceanic AdministrationQingdao 266033China Shandong Yellow River Delta National Nature Reserve Administration Committee Dongying 257091China

Spartina alterniflora as an alien invasive plant,poses a serious threat to the ecological functions of the coastal wetland of the Jiaozhou Bay.As of 2019,the distribution area of S.alterniflora in the Jiaozhou Bay has reached more than 500 hm^(2).For this reason,combined with field surveys,remote sensing monitoring of the invasion S.alterniflora in the Jiaozhou Bay has been carried out.To accurately identify S.alterniflora within the Jiaozhou Bay coastal wetland,we used a new method which is an implement of deep convolutional neural network,and by which we got a higher accuracy than the traditional method.Based on distribution of S.alterniflora extracted by the proposed method,the temporal and spatial distribution characteristics of S.alterniflora were analyzed.And then combined with environmental factors,the invasion mechanism of S.alterniflora in the Jiaozhou Bay was analyzed in detail.From the monitoring results,it can be seen that S.alterniflora in Jiaozhou Bay is mainly distributed in the beaches near the Yanghe River Estuary and its southern side,the Dagu River Estuary and the Nügukou.Spartina alterniflora first broke out near the Yanghe River Estuary and gradually spread to the tidal flats near the Nügukou.The Dagu River Estuary is dominated by S.anglica,whose area has not changed much over the years,and a small amount of S.alterniflora has invaded later.

关键词： Spartina alterniflora remote sensing coastal wetland deep residual network

Tumor microenvironment-responsive MnSiO_(3)-Pt@BSA-Ce6 nanoplatform for synergistic catalysis-enhanced sonodynamic and chemodynamic cancer therapy

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第6期33卷 2959-2964页

作者： Fan Jiang Chunzheng Yang Binbin Ding Shuang Liang yajie zhao Ziyong Cheng Min Liu Bengang Xing Ping’an Ma Jun Lin State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Department of Periodontology Stomatological HospitalJilin UniversityChangchun 130021China School of Physical&Mathematical Sciences Nanyang Technological UniversitySingapore 639798Singapore

Compared with traditional photodynamic therapy(PDT),ultrasound(US)triggered sonodynamic therapy(SDT)has a wide application prospect in tumor therapy because of its deeper penetration depth.Herein,a novel MnSiO_(3)-Pt(MP)nanocomposite composed of Mn Si O_(3)nanosphere and noble metallic Pt was successfully constructed.After modification with bovine serum albumin(BSA)and chlorine e6(Ce6),the multifunctional nanoplatform Mn SiO_(3)-Pt@BSA-Ce6(MPBC)realized the magnetic resonance imaging(MRI)-guided synergetic SDT/chemodynamic therapy(CDT).In this nanoplatform,sonosensitizer Ce6 can generate singlet oxygen(^(1)O_(2))to kill cancer cells under US irradiation.Meanwhile,the loaded Pt has the ability to catalyze the decomposition of overexpressed hydrogen peroxide(H_(2)O_(2))in tumor microenvironment(TME)to produce oxygen(O_(2)),which can conquer tumor hypoxia and promote the SDT-induced^(1)O_(2)production.In addition,MP can degrade in mildly acidic and reductive TME,causing the release of Mn^(2+).The released Mn^(2+) not only can be used for MRI,but also can generate hydroxyl radical(^·OH)for CDT by Fenton-like reaction.The multifunctional nanoplatform MPBC has high biological safety and good anticancer effect,which displays the great latent capacity in biological application.

关键词： Sonodynamic therapy Chemodynamic therapy Artificial enzyme Oxygen generation Synergetic therapy

Simulation of Dynamic Recrystallization in 7075 Aluminum Alloy Using Cellular Automaton

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 425-435页

作者：赵晓东 SHI Dongxing 李亚杰 QIN Fengming CHU Zhibing YANG Xiaorong School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

The evolution of microstructure during hot deformation is key to achieving good mechanical properties in aluminum alloys.We have developed a cellular automaton(CA) based model to simulate the microstructural evolution in 7075 aluminum alloy during hot deformation.Isothermal compression tests were conducted to obtain material parameters for 7075 aluminum alloy,leading to the establishment of models for dislocation density,nucleation of recrystallized grains,and grain growth.Integrating these aspects with grain topological deformation,our CA model effectively predicts flow stress,dynamic recrystallization(DRX) volume fraction,and average grain size under diverse deformation conditions.A systematic comparison was made between electron back scattered diffraction(EBSD) maps and CA model simulated under different deformation temperatures(573 to 723 K),strain rates(0.001 to 1 s^(-1)),and strain amounts(30% to 70%).These analyses indicate that large strain,high temperature,and low strain rate facilitate dynamic recrystallization and grain refinement.The results from the CA model show good accuracy and predictive capability,with experimental error within 10%.

关键词： cellular automaton dynamic recrystallization 7075 aluminum alloy hot compression