检索结果-南通市图书馆

Oil Palm Fiber Hybrid Composites: A Recent Review

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2024年第10期12卷 1661-1689页

作者： H.A.Aisyah e.Hishamuddin A.W.Noorshamsiana Z.Ibrahim R.A.Ilyas Biomass Technology Unit Engineering and Processing DivisionMalaysian Palm Oil Board(MPOB)6Persiaran InstitusiBandar Baru BangiKajangSelangor43000Malaysia Department of Chemical engineering Faculty of Chemical and Energy EngineeringUniversiti Teknologi MalaysiaJohor81310Malaysia

Composite materials from oil palmfiber enhance sustainability by utilizing renewable resources,reducing depen-dence on non-renewable materials,and lessening environmental *** their mechanical and dimen-sional stability limitations,oil palmfiber-based polymer composites offer significant advantages,such as natural abundance,potential weight reduction,and cost-effectiveness due to local availability and *** growing interest in oil palm hybrid composites,made from blending differentfibers,is due to their custo-mizable mechanical and physical *** is one of the most effective methods to reinforce and improve the performance of oil palm-derived composite *** review investigates the structural qualities of hybrid composites made from oil palmfibers,their suitability for diverse applications,and recent advancements in *** focusing on the availability,properties,applications,challenges,and future direc-tions of oil palmfiber hybrid composites,this review highlights the potential of these materials to enhance mechanical and functional properties,thereby contributing to sustainable development and innovation in com-posite materials.

关键词： Oil palmfiber empty fruit bunch mesocarpfiber hybrid composite

CLeC3A gene three polymorphisms and risk of gastric cancer in Northwestern Chinese population

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCeLL 2021年第1期45卷 103-108页

作者： PING YANG LIJUAN YUAN SHUJIA PeNG YANMING DONG LIN YANG XI’e HU GUOQIANG BAO Department of General Surgery Tangdu HospitalAir Force Medical University of People’s Liberation ArmyXi’an710038China

This study aimed to evaluate the association between the CLeC3A gene polymorphisms(rs2735401/rs2293776/rs2072665)and the gastric cancer risk in the Northwestern Chinese population.A hospital-based case-control study was conducted on 681 cases and 756 healthy *** ratio(OR)and 95%confidence intervals(CI)were applied to evaluate the association of the CLeC3A polymorphisms on gastric cancer *** found that there was no significant association between the CLeC3A polymorphisms and gastric cancer susceptibility,which was detected in the main analysis or stratification analyses of age,gender,and clinical *** findings verified that the CLeC3A polymorphisms are not associated with gastric cancer susceptibility in the Northwestern Chinese population;other polymorphisms should be investigated to further clarify the susceptibility to gastric cancer.

关键词： CeLC3A gastric cancer risk single nucleotide polymorphisms

Immunohistochemical assessment of NY-eSO-1 expression in esophageal adenocarcinoma resection specimens

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第14期20卷 4011-4016页

作者： Stephen J Hayes Keng Ngee Hng Peter Clark Fiona Thistlethwaite Robert e Hawkins Yeng Ang Department of Histopathology Salford Royal NHS Foundation Trust Faculty of Medical and Human Sciences University of Manchester Department of Gastroenterology Salford Royal NHS Foundation Trust Department of Medical Oncology The Christie NHS Foundation Trust Department of Medical Oncology Paterson Institute of Cancer ResearchUniversity of Manchester

AIM: To assess NY-eSO-1 expression in a cohort of esophageal adenocarcinomas.

关键词： esophageal adenocarcinoma Immunohistochemistry NY-eSO-1 Stem cells Vesicle trafficking

Bed diversity in the shallow water environment of Pappas lagoon in Greece

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2012年第1期27卷 1-17页

作者： G.PAPATHeODOROU P.AVRAMIDIS e.FAKIRIS D.CHRISTODOULOU N.KONTOPOULOS Laboratory of Marine Geology and Physical Oceanography Department of GeologyUniversity of Patras Technological educational-Institute of Messolonghi Department of Aquaculture and Fisheries Management 3. Research ScientistLaboratory of Marine Geology and Physical OceanographyDepartment of GeologyUniversity of Patras 4. Laboratory of SedimentologyDepartment of GeologyUniversity of Patras

Acoustic classification systems and the Sediment Trend Analysis method were used to identify and map the bed diversity in a very shallow(<3.0m),coastal lagoon,Pappas lagoon,Western Greece. Analogue acoustic data,colle... 详细信息

Acoustic classification systems and the Sediment Trend Analysis method were used to identify and map the bed diversity in a very shallow(estern Greece. Analogue acoustic data,collected by means of a 100 kHz side scan sonar system,were digitized and classified into six acoustic classes using recently developed acoustic classification systems (SonarClass,TargAn).By comparing the acoustic classes to ground truth data consisting of sediment grain size and visual inspection of the lagoon-bed,it is demonstrated that the six acoustic classes correlate well with the predominant surface sediment types and *** the spatial distribution of the classes can be considered to represent the spatial pattern of the sedimentary assemblages of the *** grain size trend analysis identified three dominant sediment pathways and directional trends which could be related to the predominant wind direction,the sediment influx through the inlets and the sediment supply from a small stream in the southern part of the *** integration of acoustic and sedimentological data together with advanced data processing systems leads to a better understanding of the sedimentary,morphological and biological processes in a shallow lagoon in different spatial and temporal scales and will therefore be beneficial to both sedimentological and biotic-diversity studies.

关键词： Trend sediment analysis Side scan sonar Grain size Acoustic classification Ground truthing

Nutritional and vitamin status in patients with neuroendocrine neoplasms

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第10期25卷 1171-1184页

作者： Dominique SVM Clement Margot eT Tesselaar Monique e van Leerdam Rajaventhan Srirajaskanthan John K Ramage Neuroendocrine Tumour Unit King’s College Hospital ENETS Centre of Excellence Department of Medical Oncology Netherlands Cancer Institute ENETS Centre of Excellence Department of Gastrointestinal Oncology Netherlands Cancer Institute Department of Gastroenterology King’s College Hospital

Symptoms of gastroenteropancreatic located neuroendocrine neoplasms(GePNeNs) are often related to food intake and manifest as abdominal pain or diarrhoea which can influence patients nutritional status. Malnutrition is common in cancer patients and influences quality of life, treatment options and survival but is also present in up to 40% of patients with GeP-NeNs. As part of malnutrition there are often deficiencies in fat-soluble vitamins, mainly vitamin D. Little knowledge exists on trace elements. Several factors influence the development of malnutrition such as size and localisation of the primary tumour as well as metastases, side effects from treatment but also hormone production of the tumour itself. One of the main influencing factors leading to malnutrition is diarrhoea which leads to dehydration and electrolyte disturbances. Treatment of diarrhoea should be guided by its cause. Screening for malnutrition should be part of routine care in every GeP-NeN patient. Multidisciplinary treatment including dietician support is necessary for all malnourished patients with GeP-NeNs.

关键词： Neuroendocrine neoplasm Nutrition Malnutrition Vitamin deficiency Diarrhoea Steatorrhoea

FRee TRANSVeRSe VIBRATIONS OF A DOUBLe-WALLeD CARBON NANOTUBe:GRADIeNT AND INTeRNAL INeRTIA eFFeCTS

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 Mechanica Solida Sinica 2014年第4期27卷 345-352页

作者： K.Y.Xu K.A.Alnefaie N.H.Abu-Hamdeh K.H.Almitani e.C.Aifantis Department of Mechanics Shanghai University Department of Mechanical engineering King Abdulaziz University Jeddah 21589 Saudi Arabia Lab of Mechanics and Materials Polytechnic School Aristotle University Thessaloniki 54124 Greece

This is a modest contribution on higher-order continuum theory for predicting size effects in small-scale objects. It relates to a preceding article of the journal by the same authors（AMSS, 2013, 26： 9-20） which considered the longitudinal dynamical analysis of a gradient elastic fiber but, in addition to an internal length, an internal time parameter is also introduced to model delay/acceleration effects associated with the underlying microstructure. In particular, the free transverse vibration of a double-walled carbon nanotube（DWNT） is studied by employing gradient elasticity with internal inertia. The inner and outer carbon nanotubes are modeled as two individual elastic beams interacting with each other through van der Waals（vdW） forces. General explicit expressions are derived for the natural frequencies and the associated inner-to-outer tube amplitude ratios for the case of simply supported DWNTs. The effects of internal length（or scale）and internal time（or inertia） on the vibration behavior are evaluated. The results indicate that the internal length and time parameters of the adopted strain gradient-internal inertia generalized elasticity model have little influence on the lower order coaxial and noncoaxial vibration modes,but a significant one on the higher order modes.

关键词： carbon nanotubes gradient elasticity internal inertia vibration behavior

Mechanisms of biotin-regulated gene expression in microbes

在线全文

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2016年第1期1卷 17-24页

作者： J.Satiaputra K.e.Shearwin G.W.Booker S.W.Polyak Department of Molecular and Cellular Biology School of Biological ScienceUniversity of AdelaideNorth TceAdelaideSouth Australia 5005Australia Centre for Molecular Pathology University of AdelaideNorth TceAdelaideSouth Australia 5005Australia

Biotin is an essential micronutrient that acts as a co-factor for biotin-dependent metabolic *** bacteria,the supply of biotin can be achieved by de novo synthesis or import from exogenous *** bacteria are able to obtain biotin through both mechanisms while others can only fulfill their biotin requirement through de novo *** to fulfill their cellular demand for biotin can have detrimental consequences on cell viability and *** understanding the transcriptional mechanisms that regulate biotin biosynthesis and transport will extend our knowledge about bacterial survival and metabolic adaptation during pathogenesis when the supply of biotin is *** most extensively characterized protein that regulates biotin synthesis and uptake is *** certain bacteria,such as escherichia coli and Staphylococcus aureus,BirA is a bi-functional protein that serves as a transcriptional repressor to regulate biotin biosynthesis genes,as well as acting as a ligase to catalyze the biotinylation of biotin-dependent *** studies have identified two other proteins that also regulate biotin synthesis and transport,namely BioQ and *** review summarizes the different transcriptional repressors and their mechanism of ***,the ability to regulate the expression of target genes through the activity of a vitamin,such as biotin,may have biotechnological applications in synthetic biology.

关键词： synthesis. synthesis consequences

Ocellar lamprophyre dyke bearing mineralization,Wadi Nugrus,eastern Desert,egypt:Geology,mineralogy and geochemical implications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 2010年第4期29卷 383-392页

作者： Ibrahim M.e. Saleh G.M. Dawood N.A. Aly G.M. Nuclear Materials Authority P.O.Box 530El-MaadiCairoEgypt

The ocellar lamprophyre dyke(eNe-WSW) is recorded at Wadi Nugrus,eastern Desert,*** cuts porphyritic biotite granites and varies in thickness from 0.5 to 1.5 m and up to 3 km in *** lamprophyre dyke has been altered,and it is characterized by porphyritic and panidiomorphic textures with plagioclase,olivine,and augite constituting the porphyritic phase in a fine groundmass of the same ***,titanite,apatite,fluorite,graphite,calcite,allanite,autunite and Fe-Ti oxides are accessory ***,chlorite and epidote are secondary *** and hematitization are *** to sub-rounded porphyritic and zoned ocelli with radiate or brush-like shapes are generally common and represent physical traps for *** ocellar features are interpreted to represent the late stage of magmatic segregation or magmatic crystallization involving two immiscible magmatic *** studies of altered lamprophyre samples,based on X-ray diffraction(XRD) and environmental scanning electron microscopy(eSeM),indicate the presence of secondary uranium minerals(autunite and uranophane),associated with gold,silver,nickel,atacamite,molybdenum,pyrite and *** presence of kaolinite indicates a high temperature *** mixing of volatile fluids with meteoric water and fluid-wall rock interaction result in changes of pH and oxygen activity and deposition of base metals in reducing environs(graphite and pyrite).Precipitation of hematite probably decreased the pH of the solution and rose acidic *** sudden change in pH and temperature of the fluids would lead to destabilization of base metal complexes favoring their *** magma source of the Nugrus lamprophyre is determined to be between calc-alkaline and alkaline and it has HKCAB and shoshonitic nature and may be derived from decomposition melting of such a metasomatised lithospheric *** is a major fractional phase to account for a rapid

关键词：煌斑岩脉矿物学地球化学沙漠埃及地质学黑云母花岗岩矿化

Discovery for New Herbicide Sites of Action by Quantification of Plant Primary Metabolite and enzyme Pools

在线全文

学校读者我要写书评

暂无评论

engineering 2020年第5期6卷 509-514页

作者： Franck e.Dayan Stephen ODuke Department of Agricultural Biology College of Agricultural SciencesColorado State UniversityFort CollinsCO 80523USA Natural Products Utilization Research Agricultural Research ServiceUnited States Department of AgricultureUniversityMS 38677USA

No herbicide with a new molecular site of action(SOA)has been introduced since the *** then,the widespread evolution of resistance of weeds to most commercial herbicides has greatly increased the need for herbicides with new *** untried strategies for the discovery on new herbicide SOAs are *** primary metabolism intermediates are phytotoxic(e.g.,protoporphyrin IX and sphingoid bases),and,because of this,the in vivo concentrations of these compounds are maintained at very low levels by *** determination of all primary metabolite phytotoxicities and pool sizes will identify targets of *** SOAs that result in accumulation of phytotoxic compounds is the first novel approach to herbicide *** second approach is to identify potential SOAs with very low in vivo enzyme *** know that higher numbers of enzyme molecules for a SOA requires more herbicide to kill a *** proteomic methods can identify low enzyme level SOAs for biorational herbicide *** approaches might be useful in discovery of herbicides more closely related to natural compounds and that can be used in lower doses.

关键词： Natural products Biorational discovery Mode of action Herbicide