检索结果-南通市图书馆

Influence of P-enriched compost application on economics and P use efficiency of a maize–wheat rotation system

The Crop Journal 2018年第6期6卷 651-658页

作者： Abdul Majeed Shahzada Munawar Mehdi Abid Niaz Abid Mahmood Ehsan-Ul-Haq Naeem Ahmad Shahid Javid atif Mehmood Sugarcane Research Institute Faisalabad Ayub Agricultural Research InstitutePunjabPakistan Soil Fertility Research Institute LahoreAyub Agricultural Research InstitutePunjabPakistan Institute of Soil Chemistry and Environmental Sciences Ayub Agricultural Research InstitutePunjabPakistan Ayub Agricultural Research Institute PunjabPakistan Provincial Reference Fertilizer Testing Laboratory Raiwind LahorePunjabPakistan Key Laboratory of Clean Utilization Technology for Renewable Energy Ministry of AgricultureCollege of EngineeringChina Agricultural UniversityBeijing 100083China

Crop phosphorus(P) deficiency and poor utilization of added P is a major agricultural problem due to reduced solubility of soil P and rapid fixation or precipitation of applied P fertilizer in alkaline and calcareous soils. The effects of P-enriched compost and single superphosphate(SSP) fertilization on maize and wheat yields and P use efficiency in a maize–wheat rotation system were studied for three years. On a three-year average, grain yields of maize and wheat after application of P-enriched compost were increased by 18% and 24%, respectively, in comparison with sole addition of a recommended dose of SSP fertilizer. P-enriched compost addition to soil increased maize and wheat yields by 12% and 17%, respectively, compared to P fertilizer plus FYM incorporation. Soil available P concentration and P uptake were affected significantly by the addition of P-enriched compost. On average, increases in P recovery, use efficiency, and agronomic efficiency of 52%, 18%, and 43% were recorded in maize and increases of 50%, 23%, and 49% in wheat. P-enriched compost application yielded 30% and 32%higher economic returns in maize and wheat than SSP fertilization alone.

关键词： P-enriched compost Maize Wheat Farmyard manure P-uptake

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

不同土壤氮水平下C_(3)和C_(4)植物之间的菌根网络及氮传递

引用

Journal of Plant Ecology 2023年第2期16卷 28-38页

作者： Muhammad atif Muneer Xiaohui Chen Muhammad Zeeshan Munir Zaib-Un Nisa Muhammad Abu Bakar Saddique Shehzad Mehmood Da Su Chaoyuan Zheng Baoming Ji College of Grassland Science Beijing Forestry UniversityBeijing 100083China College of Resources and Environment/International Magnesium Institute Fujian Agriculture and Forestry UniversityFuzhou 350002China Research Centre of Phosphorous Efficient Utilization and Water Environment Protection along the Yangtze River Economic Belt College of Resources and EnvironmentAnhui Agricultural UniversityHefei 230036China School of Environment and Energy Peking University Shenzhen Graduate SchoolShenzhen 518055China College of Biological Science and Technology Beijing Forestry UniversityBeijing 100083China Cotton Research Institute MultanPunjabPakistan Institute of Plant Breeding and Biotechnology Muhammad Nawaz Shareef University of AgricultureMultanPakistan Department of Plant Sciences Quaid-i-Azam UniversityIslamabad 45320Pakistan Department of Environmental Sciences COMSATS University IslamabadVehari CampusVehari 61100Pakistan Key Laboratory of Ministry of Education for Genetics Breeding and Multiple Utilization of CropsCollege of AgricultureFujian Agriculture and Forestry UniversityFuzhou 350002China

丛枝菌根真菌(AMF)的菌丝在土壤中通常可以链接相同或不同物种的植物根系,所形成的菌根网络可以将养分从一种植物传递到另一种植物。然而,土壤中的氮(N)含量对不同植物物种之间通过菌根网络进行养分转移的影响尚未实验验证。为了定量研... 详细信息

丛枝菌根真菌(AMF)的菌丝在土壤中通常可以链接相同或不同物种的植物根系,所形成的菌根网络可以将养分从一种植物传递到另一种植物。然而,土壤中的氮(N)含量对不同植物物种之间通过菌根网络进行养分转移的影响尚未实验验证。为了定量研究不同土壤氮水平下羊草(LC)和糙隐子草(CS)之间通过菌根网络的养分转移,本研究建立了两个分室盆栽系统,即CS–LC系统(CS和LC分别为供体和受体)和LC–CS系统(LC和CS分别为供体和受体),设置了3种土壤氮添加水平,即不添加氮对照(N0)、添加7 mg/kg(N1)和添加14 mg/kg(N2)。通过在供体植物一侧土壤添加稳定同位素^(15)N,示踪并量化不同物种植物幼苗之间通过菌根网络传递的氮。在CS–LC系统中,AMF侵染率、菌丝密度和植物生物量在N1水平最高;而在LC–CS系统,AMF侵染率、菌丝密度和植物生物量在N2水平达到最大。此外,在CS–LC系统中,^(15)N转移率介于16%到61%之间,在N1水平最大。对于LC–CS系统,^(15)N传输速率相对较低,最大值出现在N0水平。这些发现表明,土壤中的氮含量能够调控供体植物和受体植物之间经由菌根网络传递的氮养分。

关键词：菌根网络氮传递差异响应糙隐子草(Cleistogene squarrosa) 羊草(Leymus chinensis) 典型草原

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

An Abstractive Summarization Technique with Variable Length Keywords as per Document Diversity

引用

Computers, Materials & Continua 2021年第3期66卷 2409-2423页

作者： Muhammad Yahya Saeed Muhammad Awais Muhammad Younas Muhammad Arif Shah atif Khan M.Irfan Uddin Marwan Mahmoud Department of Software Engineering Government College UniversityFaisalabadFaisalabad38000Pakistan Department of IT and Computer Science Pak-Austria Fachhochschule Institute of Applied Sciences and TechnologyHaripurPakistan Department of Computer Science Islamia College PeshawarPeshawarPakistan Institute of Computing Kohat University of Science and TechnologyKohatPakistan Faculty of Applied Studies King Abdulaziz UniversityJeddahSaudi Arabia

Text Summarization is an essential area in text mining,which has procedures for text *** natural language processing,text summarization maps the documents to a representative set of descriptive ***,the objective of text extraction is to attain reduced expressive contents from the text *** summarization has two main areas such as abstractive,and extractive *** text summarization has further two approaches,in which the first approach applies the sentence score algorithm,and the second approach follows the word embedding *** such text extractions have limitations in providing the basic theme of the underlying *** this paper,we have employed text summarization by TF-IDF with PageRank keywords,sentence score algorithm,and Word2Vec word *** study compared these forms of the text summarizations with the actual text,by calculating cosine ***,TF-IDF based PageRank keywords are extracted from the other two extractive *** intersection over these three types of TD-IDF keywords to generate the more representative set of keywords for each text document is *** technique generates variable-length keywords as per document diversity instead of selecting fixedlength keywords for each *** form of abstractive summarization improves metadata similarity to the original text compared to all other forms of summarized *** also solves the issue of deciding the number of representative keywords for a specific text *** evaluate the technique,the study used a sample of more than eighteen hundred text *** abstractive summarization follows the principles of deep learning to create uniform similarity of extracted words with actual text and all other forms of text *** proposed technique provides a stable measure of similarity as compared to existing forms of text summarization.

关键词： Metadata page rank sentence score word2vec cosine similarity This

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Burden of Congenital Defects Diagnosed through Ultrasonography in Soba Fetomaternal Unit, Khartoum, Sudan

引用

Open Journal of Radiology 2023年第1期13卷 67-76页

作者： Mona Awadallah Mohammed Ali Osman Isam Ahmed Ali Elhassan Fareeda Nikhat Khan Abdulmutallab Alimam Mounkaila Noma atif Fazari Faculty of Medicine University of Medical Sciences and Technology Khartoum Sudan Department of Obstetrics & Gynecology Latifa Hospital DHA Dubai UAE Department of Obstetrics and Gynecology Faculty of Medicine University of Khartoum Khartoum Sudan

Background: Congenital anomalies are among the leading causes of fetal loss, despite it can be identified prior to birth through advanced technology in expert hands. Our research aimed at estimating the prevalence of congenital anomalies in Sudan. Methods: A facility-based retrospective cross-sectional study combined with a community-based survey through a telephone interview was implemented on a purposive convenient sample of 138 participants. The data were computerized in Epi Info 7. Google Earth Pro enabled to collect the geographical coordinates for the residence of the participants. Descriptive statistics were performed through SPSS 23 and ArcGIS 10.3 was used to generate the geographical distribution map of congenital defects to visualize the catchment areas of Soba Ultrasonography Unit. Results: Of the 138 participants, the estimated prevalence of congenital defects was 2.2/10,000 live births. The ultrasonography screening revealed that neural tube defects were the most prevalent anomalies with 13.0% (18/138), which represented 47.4% (18/38) of all defects. Concerning children, a mortality rate of 23.2% (32/138) was reported. Conclusions: The child mortality rate post ultrasound screening of 23.2%, and the neural tube defects being the most common anomalies appealed to Sudan health authorities for focusing on more preventive antenatal practices to strengthen and promote maternal and child health.

关键词： Prevalence Congenital Defects Ultrasound Spatial Distribution

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

COVID-19 in a liver transplant recipient:Could iatrogenic immunosuppression have prevented severe pneumonia?A case report

引用

World Journal of Gastroenterology 2020年第44期26卷 7076-7084页

作者： Anna Sessa Alessandra Mazzola Chetana Lim Mohammed atif Juliana Pappatella Valerie Pourcher Olivier Scatton Filomena Conti Department of Hepatology and Gastroenterology University of Naples Federico IINapoli 80131Italy APHP Unite Medicale de Transplantation Hepatique Hopital Pitie SalpetriereParis 75013France Sorbonne Universite INSERMCentre de Recherche Saint-Antoine(CRSA)Paris 75013France APHP Unite de Chirurgie Hepatobiliaire et Transplantation HepatiqueHopital Pitie SalpetriereParis 75013France APHP Centre d’immunologie et des Maladies InfectieusesInserm U1135Hopital Pitie-SalpetriereParis 75013France Hospital Felicio Rocho Barro Preto 9530Brazil APHP Service des Maladies InfectieusesHopital Pitie SalpetriereParis 75013France Sorbonne Universite INSERMInstitute of Cardiometabolisme and Nutrition(ICAN)Paris 75013France

BACKGROUND Coronavirus disease(COVID)is a new and highly contagious infectious disease caused by the coronavirus(COVID-19 or severe acute respiratory syndrome coronavirus 2).There is limited data regarding the incidence and management of COVID-19 in immunocompromised patients’*** the pre-COVID-19 era,these patients were already at an increased risk of developing opportunistic *** often manifested with atypical *** SUMMARY We report another case of uneventful COVID-19 pneumonia in a 58-year old male who was 18 mo’post liver *** received tacrolimus monotherapy since July *** clinical manifestations included only epigastric pain radiating to the right hypochondrium,nausea and *** had no fevers,cough,shortness of breath,anosmia or dysgeusia even if the chest computed tomography scan revealed an extension of the multiple patchy ground-glass density shadows to the upper lobe of the left lung *** was hospitalised and received a course of oral chloroquine(200 mg×3 per day)for a period of 10 ***,the COVID 19 infection was uneventful though there were no modifications to his tacrolimus *** was successfully *** performed subsequent follow-up via *** In light of the current pandemic,it is even more important to identify how the liver recipient’s patients present and are managed,especially for immunosuppression treatment.

关键词： Liver transplantation COVID-19 Immunosuppression Gastrointestinal symptom Infection Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Septicemic Melioidosis:A Forensic Autopsy Case Report

引用

Journal of Forensic Science and Medicine 2018年第4期4卷 229-232页

作者： atif Shamsudin Heo Chong Chin Ahmad Hafizam Hasmi Hapizah Mohd Nawawi department of Forensic Medicine National Institute of Forensic MedicineHospital Kuala LumpurMinistry of Health MalaysiaKuala LumpurMalaysia department of Medical Microbiology and Parasitology Faculty of MedicineSelangorMalaysia institute of Pathology Laboratory and Forensic Medicine(1-PPerForM)Faculty of MedicineUniversiti Teknologi MARASelangorMalaysia

We report a 27-year-old male from Kuwait who died due to melioidosis,and the diagnosis was achieved after the deceased underwent postmortem examination at the Forensic Department,Kuala Lumpur *** the disease is endemic in Southeast Asia and Northern Australia,human melioidosis infection has yet been reported in *** was initially diagnosed as acute gastroenteritis at a private clinic before being found dead at a hotel in Kuala *** autopsy revealed positive findings of Burkholderia pseudomallei in the deceased brain,lung,liver,and spleen as well as in the blood and cerebrospinal fluid *** deceased^death highlights the importance of early accurate diagnosis,the common manifestations,and the need of effective antibiotic treatment of septicemic melioidosis in high prevalent areas.

关键词： Autopsy Burkholderiapseudomallei melioidosis postmortem septicemic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fractography Analysis with Topographical Features of Multi-Layer Graphene Reinforced Epoxy Nanocomposites

引用

Graphene 2016年第4期5卷 166-177页

作者： Rasheed atif Fawad Inam Department of Mechanical and Construction Engineering Faculty of Engineering and Environment Northumbria University Newcastle UK

The stiff and fragile structure of thermosetting polymers, such as epoxy, accomplices the innate cracks to cause fracture and therefore the applications of monolithic epoxy are not ubiquitous. However, it is well established that when reinforced especially by nano-fillers, its ability to withstand crack propagation is propitiously improved. The crack is either deflected or bifurcated when interacting with strong nano-filler such as Multi-Layer Graphene (MLG). Due to the deflection and bifurcation of cracks, specific fracture patterns are observed. Although these fracture patterns seem aesthetically appealing, however, if delved deeper, they can further be used to estimate the influence of nano-filler on the mechanical properties. Here we show that, by a meticulous examination of topographical features of fractured patterns, various important aspects related to fillers can be approximated such as dispersion state, interfacial interactions, presence of agglomerates, and overall influence of the incorporation of filler on the mechanical properties of nanocomposites.

关键词： Fractography Multi-Layer Graphene (MLG) Epoxy Nanocomposites Mechanical Properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Silver(Ⅱ) 5,10,15,20-tetra(ethoxycarbonyl) porphyrin:An unexpected six-coordinate linear assembled structure

引用

Chinese Chemical Letters 2018年第9期29卷 1404-1408页

作者： Hua-Hua Wang Hai-Yang Liu Fan Cheng atif Ali Lei Shi Xin-Yan Xiao Chi-Kwong Chang School of Chemistry and Chemical Engineering Key Laboratory of Functional Molecular Engineering of Guangdong Province South China University of Technology Department of Chemistry Southern University of Science and Technology Department of Chemistry Guangdong University of Education Department of Chemistry Michigan State University

The crystal structure of silver（Ⅱ） 5,10,15,20-tetra（ethoxycarbonyl）porphyrin （Ag[Ⅱ]TECP） revealed it formed a one-dimensional coordination polymer through weak Ag-O interactions with an unusual six-coordinated... 详细信息

关键词： Porphyrin Silver Six-coordinated assembly Crystal structure Hydrogen bond

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fractography Analysis of Monolithic Epoxy with Tailored Topography

引用

World Journal of Engineering and Technology 2016年第4期4卷 517-527页

作者： Rasheed atif Fawad Inam Department of Mechanical and Construction Engineering Faculty of Engineering and Environment Northumbria University Newcastle upon Tyne UK

The topographical features of fractured tensile, flexural, K1C, and impact specimens of monolithic epoxy have been studied and correlated with mechanical properties and surface features of samples before fracture. The topographical features studied include waviness (Wa), roughness average (Ra), root mean square value (Rq), and maximum roughness height (Rmax or Rz). As surface notches generate triaxial state of stress, therefore, the crack propagation is precipitated resulting in catastrophic failure. Although surfaces can be examined before fracture for any deleterious topographical elements, however, fractured surfaces can reveal finer details about the topography. It is because, as discussed in this article, surfaces with specific topography produce fracture patterns of peculiar aesthetics, and if delved deeper, they can further be used to estimate about the topography of surfaces before fracture. In addition, treating the samples with surfaces of specific topography can help improve the mechanical properties of monolithic epoxy.

关键词： Fractography Topography Monolithic Epoxy Fracture Toughness Mechanical Properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Modeling and Simulation of Graphene Based Polymer Nanocomposites: Advances in the Last Decade

引用

Graphene 2016年第2期5卷 96-142页

作者： Rasheed atif Fawad Inam Department of Mechanical and Construction Engineering Faculty of Engineering and Environment Northumbria University Newcastle UK

Modeling and simulation allow methodical variation of material properties beyond the capacity of experimental methods. The polymers are one of the most commonly used matrices of choice for composites and have found applications in numerous fields. The stiff and fragile structure of monolithic polymers leads to the innate cracks to cause fracture and therefore the engineering applications of monolithic polymers, requiring robust damage tolerance and high fracture toughness, are not ubiquitous. In addition, when “many-parts” cling together to form polymers, a labyrinth of molecules results, which does not offer to electrons and phonons a smooth and continuous passageway. Therefore, the monolithic polymers are bad conductors of heat and electricity. However, it is well established that when polymers are embedded with suitable entities especially nano-fillers, such as metallic oxides, clays, carbon nanotubes, and other carbonaceous materials, their performance is propitiously improved. Among various additives, graphene has recently been employed as nano-filler to enhance mechanical, thermal, electrical, and functional properties of polymers. In this review, advances in the modeling and simulation of grapheme based polymer nanocomposites will be discussed in terms of graphene structure, topographical features, interfacial interactions, dispersion state, aspect ratio, weight fraction, and trade-off between variables and overall performance.

关键词： Graphene Polymer Nanocomposites Modeling Simulation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：