ASM Science Journal最新文献_第2页

Iapetus Equatorial Ridge: The Understanding from The Quran and The Hadith Iapetus 赤道脊：从《古兰经》和《圣训》中的理解

ASM Science Journal Pub Date : 2024-03-18 DOI: 10.32802/asmscj.2023.1399

Nusairah Ramli, Hafizah Noor Isa, Ahmad Faizuddin Ramli, Ramli Awang

引用次数: 0

Species Richness and Diversity of Gut Microbiota may Reduce AHPND in the Whiteleg Shrimp, Litopenaeus vannamei 肠道微生物群的物种丰富性和多样性可减少白对虾的AHPND

ASM Science Journal Pub Date : 2024-02-27 DOI: 10.32802/asmscj.2023.1517

Wey-Lim Wong, Shen-Yin Lim, Loo Keat Wei

{"title":"Species Richness and Diversity of Gut Microbiota may Reduce AHPND in the Whiteleg Shrimp, Litopenaeus vannamei","authors":"Wey-Lim Wong, Shen-Yin Lim, Loo Keat Wei","doi":"10.32802/asmscj.2023.1517","DOIUrl":"https://doi.org/10.32802/asmscj.2023.1517","url":null,"abstract":"Acute hepatopancreatic necrosis disease (AHPND) causes massive economic loss in shrimp culture sector. Eco-friendly feed additives, which can reduce antibiotic resistance in bacteria and antibiotic residues present in aquaculture products, have become popular in shrimp farming. These additives have proven to maintain a balance host gut microbiota in preventing pathogen infection. In the present study, gut microbiota of Litopenaeus vannamei, which had been administrated with different diets (probiotic: Bacillus B2; prebiotic: Gracilaria changii, G; and a combination of Bacillus B2 and G. changii, B2+G) and post-challenged with AHPND-causing Vibrio parahaemolyticus strain 3HP, was determined using the PCR-DGGE method. The results showed that the gut microbiota of L. vannamei was dominated by the phylum Proteobacteria. The abundance of Proteobacteria was higher in the B2+G and G treatment groups. High abundance of native gut microbiota, such as Proteobacteria might prevent the adhesion of virulent bacteria by competitive exclusion, and thus, reducing the chance of AHPND infection. Moreover, the shrimp from the B2+G treatment group with higher survival in the challenge tests possessed a higher diversity and species richness of gut microbiota. This suggests that higher diversity and species richness of beneficial gut microbiota probably interfering bacterial communication among the pathogens by either destructing or neutralising their quorum sensing signals. Consequently, this will prevent the colonisation of pathogens in the gut and resulted in a higher survival of the shrimp challenged with V. parahaemolyticus.","PeriodicalId":38804,"journal":{"name":"ASM Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140425168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trace Determination of Phenanthrene and Fluorene in Beverages Using D-μ-SPE and Liquid Chromatography Analysis 利用 D-μ-SPE 和液相色谱分析痕量测定饮料中的菲和芴

ASM Science Journal Pub Date : 2024-02-26 DOI: 10.32802/asmscj.2023.1512

Nor Suhaila Mohamad Hanapi, W. N. Wan Ibrahim, Farahnaz Mohammad Anwar, N. Zaini, S. Kamaruzaman, A. L. Anis

{"title":"Trace Determination of Phenanthrene and Fluorene in Beverages Using D-μ-SPE and Liquid Chromatography Analysis","authors":"Nor Suhaila Mohamad Hanapi, W. N. Wan Ibrahim, Farahnaz Mohammad Anwar, N. Zaini, S. Kamaruzaman, A. L. Anis","doi":"10.32802/asmscj.2023.1512","DOIUrl":"https://doi.org/10.32802/asmscj.2023.1512","url":null,"abstract":"Dispersive micro solid phase extraction (D-μ-SPE) method using Graphene Oxide (GO) for the extraction and pre-concentration of selected polycyclic aromatic hydrocarbons (PAHs) from beverage samples prior to high-performance liquid chromatography - diode array detector (HPLC - DAD) is reported. Selected PAHs Fluorene (FLU) and Phenanthrene (PHE) were used as targeted analytes. An experimental design using Response Surface Methodology (RSM) and Box–Box–Behnken design (BBD) was performed to evaluate the interactive effects of three significant parameters: mass of sorbent, sample volume and extraction time. Under the optimum conditions, the method revealed good linearity (R2 = 0.9995 – 0.9998) over a concentration range of 0.5 – 5.0 mg L-1. The limit of detection (LOD) was in the range of 0.03 – 0.24 mg L-1 with satisfactory relative recoveries (81 – 99 %) and good relative standard deviation (RSD) of ≤ 3.80 % (n = 3). The method was successfully applied to tea, coffee, and milk samples and proved to be a simple, rapid, and reliable method with good extraction efficiencies for the detection of PAHs in beverage samples.","PeriodicalId":38804,"journal":{"name":"ASM Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140430299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of Multi-Criteria Decision-Making in Leaf Spring Manufacturing’s Performance 多标准决策在叶片弹簧制造绩效中的应用

ASM Science Journal Pub Date : 2024-02-23 DOI: 10.32802/asmscj.2023.1617

Chee Keong Ch'ng, Xiong Zheng Leong

{"title":"Application of Multi-Criteria Decision-Making in Leaf Spring Manufacturing’s Performance","authors":"Chee Keong Ch'ng, Xiong Zheng Leong","doi":"10.32802/asmscj.2023.1617","DOIUrl":"https://doi.org/10.32802/asmscj.2023.1617","url":null,"abstract":"Lean manufacturing is the optimal way of producing goods through the removal of waste and implementing flow, as opposed to batch processing. Many factories have transformed to align with the goal of lean manufacturing by minimising the resources of factories, such as less worker effort, less time and many more to lead to high efficiency towards good product quality and become highly responsive to customer demand. The condition of product and machinery, arrangement of inventory and equipment, the standard operation procedure of work and workers' safety awareness are the dominant elements in the leaf spring manufacturing process. Due to the crucial role that leaf springs play in the performance and safety of vehicles, it is crucial to eradicate any flaws in the designing and manufacturing processes. This study focuses on 5 core criteria, which are workers, time, safety, machines, and products that need to be enhanced. In the subgroup, each pair of sub-criteria will be compared regarding their importance with respect to each criterion. Analytical Hierarchy Process (AHP) is proposed to rank and aggregate the criteria based on their level of importance. The outcome of AHP showed that Safety (0.233) and Time (0.281) were the prominent criteria that need to be prioritised. Wear Personal Protective Equipment (PPE) (0.394), First Aid (0.324), Die and Pin (0.347), and Forklift Deliver (0.368) are the sub-criteria for safety and time. As a result, prompt and precise actions are needed to increase the quality and reliability of the product.","PeriodicalId":38804,"journal":{"name":"ASM Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140435962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Urban Land Use Changes in Xingtai City from the Year 2000 to 2020 for Urban Development Planning 2000-2020年邢台市城市土地利用变化分析，为城市发展规划提供依据

ASM Science Journal Pub Date : 2024-02-02 DOI: 10.32802/asmscj.2023.1546

Xu Lu, Xingtao Wei, Jurry Foo

引用次数: 0

Students’ Algebraic Proficiency and Attitude towards Learning Algebra 学生的代数能力和学习代数的态度

ASM Science Journal Pub Date : 2024-01-24 DOI: 10.32802/asmscj.2023.1475

Teoh Sian Hoon, Ilyana Ghazali, Parmjit Singh, T. H. Cheong, Joseph Boon Zik Hong

{"title":"Students’ Algebraic Proficiency and Attitude towards Learning Algebra","authors":"Teoh Sian Hoon, Ilyana Ghazali, Parmjit Singh, T. H. Cheong, Joseph Boon Zik Hong","doi":"10.32802/asmscj.2023.1475","DOIUrl":"https://doi.org/10.32802/asmscj.2023.1475","url":null,"abstract":"Learning algebra is a difficult process that necessitates a positive attitude in order to maintain interest and master key concepts. Previous research found that students' attitudes influenced their algebra learning. As a result, more input is required to observe the current influence of attitudes on algebra learning. This study aims to investigate secondary school students’ levels of proficiency and attitudes towards learning algebra. A case study was employed to collect data using an algebra test, a questionnaire on attitude, and task-based interviews. The subjects of this study were Form Three and Form Four students who were in the Dual Language Programme (DLP) in a school in Malaysia. A total of 93 students volunteered to participate in this study, and three of them were interviewed for insights into solving algebra problems. This study revealed that (1) there was no significant difference in algebra achievement between the Form Three and Form Four students; (2) there was a negative correlation between the achievement and attitudes; and (3) the students displayed rather low proficiency in answering the test questions, which could be attributed to difficulties with comprehension of problems in algebra and inadequate reasoning when applying problem solving strategies. These findings have implications for developing positive attitudes towards the learning of algebra. It is recommended that educators look into these areas to equip students with the right attitudes and knowledge for advanced learning at university.","PeriodicalId":38804,"journal":{"name":"ASM Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139601795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Analysis on Research Collaboration Between Mathematicians in Universiti Putra Malaysia 马来西亚博特拉大学数学家之间的研究合作分析

ASM Science Journal Pub Date : 2024-01-19 DOI: 10.32802/asmscj.2023.1485

Ummu Shalihah Mohd Zu, Kai Siong Yow

引用次数: 0

Herbal Yield, Secondary Metabolites and Antioxidant Activities of Piper sarmentosum Roxb. affected by Different Harvest Maturity 不同收获成熟度对瓜蒌子产量、次生代谢物和抗氧化活性的影响

ASM Science Journal Pub Date : 2024-01-05 DOI: 10.32802/asmscj.2023.1574

Narin Taokaenchan

引用次数: 0

Effects of Solution pH on Chemical Bath Deposited Iron-Sulfide-Oxide with Tartaric Acid Presence 溶液 pH 值对含有酒石酸的化学沉积硫化铁的影响

ASM Science Journal Pub Date : 2024-01-05 DOI: 10.32802/asmscj.2023.1432

Muhammad Hadif Amri, Adrian Afzal Ariff, A. Supee, M. Z. Mohd Yusop

引用次数: 0

Milling Time Effects on the Thermal Degradation, Density, and Porosity of Coconut Shell-Reinforced Epoxy Biocomposites 研磨时间对椰壳增强环氧生物复合材料热降解、密度和孔隙率的影响

ASM Science Journal Pub Date : 2024-01-05 DOI: 10.32802/asmscj.2023.1420

Ismail Ismail

{"title":"Milling Time Effects on the Thermal Degradation, Density, and Porosity of Coconut Shell-Reinforced Epoxy Biocomposites","authors":"Ismail Ismail","doi":"10.32802/asmscj.2023.1420","DOIUrl":"https://doi.org/10.32802/asmscj.2023.1420","url":null,"abstract":"Polymer biocomposites are sustainable and environmentally friendly materials that can be applied to the building, furniture, aerospace, and automotive industries. In this study, biocomposites made of coconut shell-reinforced epoxy resin were prepared and characterised. Initially, the coconut shells were 200 mesh. Then, they were milled by using a ball mill for 10, 20, 30, and 40 h. The biocomposites were manufactured by using a compression method while keeping a constant ratio of filler and matrix at 85 vol.%: 15 vol.%. The effects of ball milling duration on the thermal degradation and physical properties of biocomposites were examined. The thermal degradation of coconut shell biocomposite occurred at 250 – 400 °C. Its thermal degradation temperature increased with the increasing milling times. The density of the coconut shell biocomposite was 1.087 g/cm3 for 0 h (without milling the fillers). Its density increased to 1.248 g/cm3 for 40 h of milling duration. Meanwhile, the porosity of coconut shell biocomposite decreased from 17.5% (0 h milling duration) to 12.1% (40 h milling duration). It was found that there was a correlation between thermal degradation and physical properties (density and porosity). This study revealed that the thermal degradation and physical properties of the biocomposites can be enhanced by decreasing the size of the fillers.","PeriodicalId":38804,"journal":{"name":"ASM Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139382263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0