检索结果-南通市图书馆

Defence Technology（防务技术） 2024年第7期37卷 111-132页

作者： Khoirul Solehah binti Abdul Rahim Alinda binti Samsuri siti Hasnawati binti Jamal siti aminah binti mohd nor siti nor Ain binti Rusly Hafizah binti Ariff Nur Shazwani binti Abdul Latif Centre for Tropicalization(CENTROP) Defence Research InstituteUniversiti Pertahanan Nasional MalaysiaKem Sungai Besi57000 Kuala LumpurMalaysia Department of Chemistry and Biology Centre for Defence Foundation StudiesUniversiti Pertahanan Nasional MalaysiaKem Sungai Besi57000 Kuala LumpurMalaysia

This review paper explores the potential of oil palm biomass as a valuable cellulose source for the production of nitrocellulose-based propellants,contributing to the green revolution and sustainable energy *** highlights the availability of the corresponding biomass in Malaysia and in line with global studies,the chemical compositions,as well as a brief description of current technologies for converting biomass of oil palm into value added products specifically *** to achieve maximum utilization of biomass from oil palm industry for cellulose production and prospective source for nitrocellulose-based propellant are also *** methodology section outlines the pretreatment of lignocellulosic fibres,cellulose extraction,and nitrocellulose production ***,the review underscores the prospective of palm oil biomass as a sustainable cellulose source for propellant manufacturing,while acknowledging the need for further research and advancements in the field.

关键词： Biopolymer Cellulose nitrate Energetic materials Green technology Palm oil

维普期刊数据库

Radiative Blood-Based Hybrid Copper-Graphene Nanoliquid Flows along a Source-Heated Leaning Cylinder

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第4期139卷 1017-1037页

作者： siti Nur Ainsyah Ghani Noor Fadiya mohd Noor Institute of Mathematical Sciences Faculty of ScienceUniversiti MalayaKuala Lumpur50603Malaysia Center for Data Analytics Consultancy&Services(UM-CDACS) Faculty of ScienceUniversiti MalayaKuala Lumpur50603Malaysia

Variant graphene,graphene oxides(GO),and graphene nanoplatelets(GNP)dispersed in blood-based copper(Cu)nanoliquids over a leaning permeable cylinder are the focus of this *** forms of graphene are highly beneficial in the biological and medical fields for cancer therapy,anti-infection measures,and drug *** non-Newtonian Sutterby(blood-based)hybrid nanoliquid flows are generalized within the context of the Tiwari-Das model to simulate the effects of radiation and heating *** governing partial differential equations are reformulated into a nonlinear set of ordinary differential equations using similar transformational *** equations are then transformed into boundary value problems through a shooting technique,followed by the implementation of the bvp4c tool in *** influences of various parameters on the model’s nondimensional velocity and temperature profiles,reduced skin friction,and reduced Nusselt number are presented for detailed *** results indicated that Cu-GNP/blood and Cu-GO/blood hybrid nanofluids exhibit the lowest and highest velocity distributions,respectively,for increased nanoparticles volume fraction,curvature parameter,Sutterby fluid parameter,Hartmann number,and wall permeability ***,opposite trends are observed for the temperature distribution for all considered parameters,except the mixed convection *** in the reduced skin friction magnitude and the reduced Nusselt number with higher values of graphene/GO/GNP nanoparticle volume fraction are also ***,GNP is identified as the superior heat conductor,with an average increase of approximately 5%and a peak of 7.8%in the reduced Nusselt number compared to graphene and GO nanoparticles in the Cu/blood nanofluids.

关键词： Hybrid nanofluid sutterby fluid tiwari-das model thermal radiation graphene graphene oxides graphene nanoplatelets

Identification of thermal front dynamics in the northern Malacca Strait using ROMS 3D-model

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 Oceanology and Limnology 2024年第1期42卷 41-57页

作者： Ku nor Afiza Asnida Ku MANSOR Nur Hidayah ROSELI Poh Heng KOK Fariz Syafiq Mohamad ALI mohd Fadzil mohd AKHIR Institute of Oceanography and Environment Universiti Malaysia TerengganuKuala Nerus 21030Malaysia Faculty of Science and Marine Environment Universiti Malaysia TerengganuKuala Nerus 21030Malaysia

The thermal front in the oceanic system is believed to have a significant effect on biological *** an era of climate change,changes in heat regulation between the atmosphere and oceanic interior can alter the characteristics of this important *** the simulation results of the 3D Regional Ocean Modelling System(ROMS),we identified the location of thermal fronts and determined their dynamic variability in the area between the southern Andaman Sea and northern Malacca *** Single Image Edge Detection(SIED)algorithm was used to detect the thermal front from model-derived *** show that a thermal front occurred every year from 2002 to 2012 with the temperature gradient at the location of the front was 0.3°C/*** to the years affected by El Ni?o and negative Indian Ocean Dipole(IOD),the normal years(e.g.,May 2003)show the presence of the thermal front at every selected depth(10,25,50,and 75 m),whereas El Ni?o and negative IOD during 2010 show the presence of the thermal front only at depth of 75 m due to greater warming,leading to the thermocline deepening and enhanced *** May 2003,the thermal front was separated by cooler SST in the southern Andaman Sea and warmer SST in the northern Malacca *** higher SST in the northern Malacca Strait was believed due to the besieged Malacca Strait,which trapped the heat and make it difficult to release while higher chlorophyll a in Malacca Strait is due to the freshwater conduit from nearby rivers(Klang,Langat,Perak,and Selangor).Furthermore,compared to the southern Andaman Sea,the chlorophyll a in the northern Malacca Strait is easier to reach the surface area due to the shallower thermocline,which allows nutrients in the area to reach the surface faster.

关键词： regional ocean modelling system thermal front Andaman Sea Malacca Strait single image edge detection algorithm

维普期刊数据库

Occurrence of K1 and K2 serotypes and genotypic characteristics of extended spectrumβ-lactamases-producing Klebsiella pneumoniae isolated from selected hospitals in Malaysia

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2024年第1期17卷 30-38页

作者： Nurul Syazrah Anuar Hazmin Hazman Sharven Raj Jeyakumar mohd Nasir mohd Desa Hasni Idayu Saidi siti norbaya Masri Nur Afiza Aziz Nurshahira Sulaiman Department of Biomedical Science Faculty of Medicine and Health SciencesUniversiti Putra Malaysia43400UPM SerdangSelangorMalaysia Department of Medical Microbiology Faculty of Medicine and Health SciencesUniversiti Putra Malaysia43400UPM SerdangSelangorMalaysia Microbiology Unit Department of PathologyHospital Sultanah AminahJalan Persiaran Sultan Abu Bakar80100 Johor BahruJohorMalaysia

Objective:To determine the distribution,phenotypic and genetic background of extended spectrumβ-lactamases(ESBL)-producing Klebsiella(K.)pneumoniae clinical isolates associated with K1 and K2 serotypes in two selected hospitals in ***:A total of 192 *** isolates were collected and subjected to antibiotic susceptibility,hypermucoviscosity test and multiplex PCR to detect the presence of K1-and K2-serotype associated *** sequence typing(MLST)was performed on ESBL-producing *** isolates presented with K1 and K2 serotypes,followed by phylogenetic ***:A total of 87 out of 192(45.3%)of the *** isolates collected were ESBL ***,only 8.3%(16/192)and 10.9%(21/192)of the total isolates were detected to carry K1-and K2-serotype associated genes,*** analysis showed that K1 and K2 capsular serotypes were not significantly associated with ESBL phenotype(P=0.196).However,they were significantly associated with hypervirulent,as demonstrated by the positive string test(P<0.001).MLST analysis revealed that ST23 as the predominant sequence type(ST)in the K1 serotype,while the ST in the K2 serotype is more ***:Although the occurrence of ESBL-producing isolates among the hypervirulent strains was low,their coexistence warrants the need for continuous *** showed that these isolates were genetically heterogeneous.

关键词： Extended spectrumβ-lactamases Klebsiella pneumoniae Capsular serotypes Genotypic

Novel energy recovery from an integrated municipal solid waste and leachate treatment system

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Waste Disposal and Sustainable Energy 2024年第1期6卷 53-61页

作者： siti Salwa Khamis Hadi Purwanto Hamzah mohd Salleh Alya Naili Rozhan Mohamed Abdur Rahman Mahammadsalman Warimani Noor Alam Faculty of Engineering International Islamic University MalaysiaJalan Gombak53100Kuala LumpurMalaysia Department of Engineering Management Universitas Internasional Semen IndonesiaGresikIndonesia Halalan Thayyiban Research Centre Sultan Sharif Ali Islamic UniversityBandar Seri BegawanBrunei Department of Mechanical Engineering P.A.College of EngineeringMangaloreKarnataka574153India Department of Mechanical Engineering Malaysia-Japan International Institute of TechnologyUniversity of Technology Malaysia54100Kuala LumpurMalaysia

Population growth,waste generation,and massive waste mismanagement have led to environmental *** of municipal solid waste(MSW)requires an efficient and sustainable integrated *** integrated thermal processing of MSW is one of the best waste management *** this study,energy analysis of MSW is carried out based on the material and energy balance of 2000 kg wet MSW,which contains 50%*** the leachate is removed,the dry MSW is sent for carbon content enhancement in carbonization to produce MSW-based ***,the combustion of MSW-based char provided high heat and syngas to be used in a hydrothermal process for MSW leachate *** result shows that the char fuel of MSW produces a sufficient amount of energy,13501.29 MJ(84.55%),in the form of synthetic gas by-product,which has a big potential as an energy *** novelty of the proposed integrated thermal system is to produce 84.55%synthetic gas by-product,which is used for electricity production,cooking,food,and heat energy for industrial *** proposed applications of this paper offer insightful information for policymaking regarding novel MSW techniques,which are economical,energy-efficient,and environmentally ***,it increases the effectiveness of MSW utilization.

关键词： Energy Carbonization Hydrothermal Municipal solid waste Integrated system

Evolution of the“ancient Kedah”:A study on urban forms at Sungai Batu Archaeological Complex(SBAC),Bujang Valley,Kedah,Malaysia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Architectural Research 2024年第1期13卷 127-143页

作者： mohd Hasfarisham Abd Halim Naizatul Akma mohd Mokhtar nor Khairunnisa Talib Shyeh Sahibul Karamah Masnan Ahmad Fadly Jusoh Mokhtar Saidin Kedah Malaysia Universiti Utara Malaysia KedahMalaysia Universiti Sains Malaysia PenangMalaysia

Archaeological research at the Sungai Batu Archaeological Complex(SBAC),which has been carried out until 2023,aims to complete the chronological data and urbanization process of the ancient *** study will especially prove that the ongoing urbanization process is aimed at developing the iron smelting industry and trade in ancient Kedah,especially in *** is because archaeological research at SBAC has proven that with the existence of the ancient Kedah iron smelting workshop at SBAC,river jetties,port management,rituals,and Buddhist monuments began to be erected,all of which can be determined by chronometric *** results of the chronometric dating have proven that the ancient Kedah Kingdom existed since the 6th century BC and was oriented towards the trade of iron resources,which allowed the use of the area to grow *** process of urbanization and land use clearly conforms to Lynch’s principle,which emphasizes the principles of 1)paths,2)edges,3)districts,4)nodes,and 5)landmarks in the development process of land use and urbanization in the complex.

关键词： Chronometric dating Urbanization Land use Monument Iron smelting site

维普期刊数据库

Effects of dietary astaxanthin enrichment on enhancing the colour and growth of red tilapia,Oreochromis sp.

在线全文

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2024年第1期9卷 52-56页

作者： Zuharlida Tuan Harith Suniza mohd Sukri nor Fatin Syuhada Remlee Fatin Nursabriena mohd Sabir Nik Nur Azwanida Zakaria Faculty of Agro Based Industry Universiti Malaysia Kelantan Jeli CampusJeliKelantan17600Malaysia

The aim of this research was to examine the effects of dietary inclusion of astaxanthin from Haematococcus pluvialis in commercial fish feed on the colour and growth of red tilapia,Oreochromis sp..A 6-week feeding trial was conducted at concentration of astaxanthin at 0%(T1),4%(T2),8%(T3)and 12%(T4)in feed formulation to examine the growth performance,colour pigmentation on skin,texture analysis and carotenoid *** showed an increment of certain growth parameter in fish fed with astaxanthin enriched *** in weight gain(WG),protein efficiency ratio(PER)was obtained in fish fed with astaxanthin enriched compared with *** treatments with astaxanthin-enriched provided higher redness(a*)to skin than negative control that directly influence the colour of the *** can be concluded that inclusion of astaxanthin from green algae into commercial fish feed can be used as an alternative natural carotenoid source in Oreochromis *** to ensure good pigmentation,hence improving the skin colour for more appealing and subsequently increase the market value of the fish.

关键词： Oreochromis sp. Astaxanthin Haematococcus pluvialis

Thermal analysis of melting effect on Carreau fluid flow around a stretchable cylinder with quadratic radiation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Propulsion and Power Research 2024年第1期13卷 132-143页

作者： Lim Yeou Jiann Ahmad Qushairi Mohamad noraihan Afiqah Rawi Dennis Ling Chaun Ching nor Athirah mohd Zin Sharidan Shafie Faculty of Science Department of Mathematical SciencesUTM 81310SkudaiJohor BahruJohorMalaysia Fundamental and Applied Science Department UTP 32610PerakMalaysia Fakulti Sains Komputer&Matematik UiTM KedahSungai Petani 08400MerbokKedahMalaysia

The melting phenomenon plays a critical role in optimizing the performance of power storage, electronic cooling, and semiconductor devices. The present study aims to analyzethe melting effect on the flow of Carreau fluid over a stretchable cylinder, with special consideration given to the impact of quadratic thermal radiation. Similarity variables and the homotopy analysis method are used to simplify and determine the semi-analytical homotopicsolutions of the governing equations. The present findings reveal that the melting parameter increases the heat transfer rate by more than 10% for both fluids, water (Pr=0.71), and polymer(Pr=10). However, as the temperature ratio due to quadratic radiation increases, the localNusselt number for water has been reduced by 25%, and an even more substantial reductionis observed for the polymer. The present study offers valuable insights into achieving optimalefficiency in electronic devices.

关键词： Quadratic thermal radiation Melting heat transfer Carreaufluid Stretching cylinder Homotopy analysis

Unusual Presentation of Heart Failure Secondary to Ruptured Aneurysmal Sinus of Valsalva: A Case Report

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 Cardiovascular Surgery 2024年第1期14卷 1-6页

作者： siti Zubaidah mohd Zahari Rozaini Hassan National Heart Institute Kuala Lumpur Malaysia

Sinus of Valsalva Aneurysm (SOVA) arises from an abnormal dilation of the aortic root, leading to enlargement between the aortic annulus and the sinotubular junction. Although often presenting without symptoms, these aneurysms bear the potential for life-threatening complications, primarily from the looming risk of rupture. We present the case of a 42-year-old Malay gentleman with a history of bilateral pedal edema and dyspnea on exertion who was diagnosed with a ruptured sinus of Valsalva aneurysm. The patient underwent successful surgical repair of the aneurysm, leading to symptomatic improvement and favorable outcomes. This case highlights the importance of early diagnosis and prompt surgical intervention in managing this uncommon condition.

关键词： Heart Failure Echocardiogram Sinus of Valsalva Aneurysm

基于旅游生态足迹模型的山地型景区绿色发展状态评估（英文）

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 Resources and Ecology 2024年第5期15卷 1324-1334页

作者：刘忠秀 nor Kalsum mohd ISA 苏丹依德里斯教育大学人文科学学院地理与环境系临沂大学土木工程与建筑学院

本研究采用旅游生态足迹模型，对山地风景区的绿色发展状况进行细致评估，其整体目标在于全面分析旅游活动对生态环境所带来的影响。评估过程包括对生态足迹、生态承载力以及生态盈余的计算和分析。在文峰山风景区的个案研究中，研究结... 详细信息

本研究采用旅游生态足迹模型，对山地风景区的绿色发展状况进行细致评估，其整体目标在于全面分析旅游活动对生态环境所带来的影响。评估过程包括对生态足迹、生态承载力以及生态盈余的计算和分析。在文峰山风景区的个案研究中，研究结果显示，当前文峰山风景区旅游业发展阶段呈现出显著的生态盈余状态。生态足迹的盈余意味着旅游活动对文峰山风景区生态环境的影响并未超过其可持续承载能力。这说明尽管旅游活动蓬勃发展，但文峰山风景区的生态环境仍然得到有效保护和维护。生态盈余的存在标志着旅游业发展与当地生态系统保护之间的平衡，这对于该地区的可持续发展至关重要。此外，本研究对旅游生态足迹组成部分进行深入分析，提供关于各种旅游相关活动（如住宿、交通、餐饮、观光和购物等）所带来的生态足迹的详细细分。这些细致的分析为了解不同旅游相关因素所带来的生态动态提供深入分析。对文峰山风景区绿色发展状况的精细评估具有重要意义，决策者可以从中获得旅游促进和环境保护之间微妙平衡的见解。所发现的生态盈余表明目前的做法符合可持续发展目标，并为类似地区提供了一个典范。然而，本研究也凸显运用旅游生态足迹模型进行计算的关键局限性，详细的结果揭示模型适用性、数据收集以及计算方法等方面存在的挑战，强调有必要对旅游生态足迹模型进行进一步完善和验证。认识到这些限制对于改进模型并确保其在不同地理环境中的稳健应用至关重要。本研究提供对山地型风景区，尤其是文峰山风景区的绿色发展状况的深入理解。研究结果为决策者和研究人员提供丰富的参考资料，提供有关旅游相关生态影响特定方面的见解。未来的研究可以在完善评估指标和改进数据收集以及分析方法方面继续努力，以提高绿色发展评估的准确性和可靠性。

关键词：绿色发展旅游生态足迹文峰山风景区