Jurnal Teknologi最新文献_第5页

Pemanfaatan Bubuk Kulit Sukun (Artocarpus altilis) Sebagai Adsorben Pemurnian Minyak Jelantah 利用面包果（Artocarpus altilis）果皮粉作为吸附剂提炼废食用油

Jurnal Teknologi Pub Date : 2024-05-01 DOI: 10.30811/teknologi.v24i1.5042

Rusna Rusna, Muhammad Sami, Teuku Rihayat

引用次数: 0

EFFECT OF SEA WATER, COASTAL SAND, AND CLAM SHELL POWDER ON COMPRESSIVE STRENGTH OF NORMAL CONCRETE 海水、沿海砂和蛤壳粉对普通混凝土抗压强度的影响

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.21484

M. Helmi, F. Alami, M. Isneini, Rendityas Mayang Sari, Muhammad Daffa Zikrillah

{"title":"EFFECT OF SEA WATER, COASTAL SAND, AND CLAM SHELL POWDER ON COMPRESSIVE STRENGTH OF NORMAL CONCRETE","authors":"M. Helmi, F. Alami, M. Isneini, Rendityas Mayang Sari, Muhammad Daffa Zikrillah","doi":"10.11113/jurnalteknologi.v86.21484","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21484","url":null,"abstract":"Durability and resilience are essential factors of reinforced concrete structures in maritime environment which are subjected by stress, abrasion, and tidal exposure continuously. The research aims to analyze the effect of marine materials and its environment on the compressive strength of concrete cube (15x15x15 cm) at various days such as 7, 14, 28, and 56 days. The marine materials were used such as seawater, coastal sand, and clamshell powder as part of the concrete mixture. In addition, the effect of seawater on curing period, also were investigated. Treatment of marine environment were conducted by placing the samples after 28 days of age in tidal zone, submerged, and coastal atmospheric area. The results show the marine environment decreased the compressive strength about of 2%, 11% and 19% for coastal atmosphere, tidal and submerged treatments respectively which correlated to carbonation depth. The use of coastal sand in concrete mixture decreased compressive strength of concrete while the presence of clamshell powder slightly increased compressive strength for both curing treatments in fresh water and seawater. The curing process in seawater until the 28-days had a similar of compressive strength rate with the ones in freshwater.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"36 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376981","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

THE EFFECT OF SAWDUST AS SELF-CURING AGENT IN CONCRETE 锯末作为混凝土自固化剂的效果

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.20946

M. Sulaiman, Nuratiqah Ruslin, Elissa Jikino, Nelly Majain, Siti Nor Farhana Zakaria, Habib Musa Mohamad, Chung Han Lim

{"title":"THE EFFECT OF SAWDUST AS SELF-CURING AGENT IN CONCRETE","authors":"M. Sulaiman, Nuratiqah Ruslin, Elissa Jikino, Nelly Majain, Siti Nor Farhana Zakaria, Habib Musa Mohamad, Chung Han Lim","doi":"10.11113/jurnalteknologi.v86.20946","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20946","url":null,"abstract":"Concrete is known as the most used material for the construction industry. It is crucial to understand the properties of concrete especially on curing interaction and process. At the water shortage areas, the production of concrete is limited as approximately 230 liters of water is needed for 1 m3 of concrete. The insufficient of water resources has inhibited the building construction and development. Nowadays, researchers have studied and developed curing technology by implementing curing agents into concrete mixes. In this paper, the potential and properties of pre-wetted sawdust as curing agent is investigated and studied. Different curing regimes are implemented and tested to determine the properties of sawdust as curing agent. The results showed that the sawdust has potential to be used for curing agent as the concrete properties have been enhanced with strength index ratios ranging between 0.87 until 0.98. Moreover, the compressive strength and tensile properties were also developed with range ratios between 0.69 up until 0.98, respectively. Hence, the application of pre-wetted sawdust inside concrete is effective for concrete production and highly recommended to be implemented at the water shortage areas.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"20 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140375587","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

CHEMICAL COMPOSITION, AMINO ACIDS PROFILE AND ANTIOXIDANT ACTIVITY OF ENZYMATIC PROTEIN HYDROLYSATE FROM Bohadschia marmorata SEA CUCUMBER Bohadschia marmorata 海黄瓜酶蛋白水解物的化学成分、氨基酸特征和抗氧化活性

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.21501

M. R. Wenno, Fredrik Rieuwpassa, Adrianus Ories Willem Kaya, Martha Luana Wattimena, June Christina Tisera

{"title":"CHEMICAL COMPOSITION, AMINO ACIDS PROFILE AND ANTIOXIDANT ACTIVITY OF ENZYMATIC PROTEIN HYDROLYSATE FROM Bohadschia marmorata SEA CUCUMBER","authors":"M. R. Wenno, Fredrik Rieuwpassa, Adrianus Ories Willem Kaya, Martha Luana Wattimena, June Christina Tisera","doi":"10.11113/jurnalteknologi.v86.21501","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.21501","url":null,"abstract":"The sea cucumber is one of the potential sub-exports of fisheries. Sea cucumbers contain highly nutritious and bioactive compounds with antioxidant, antibacterial, anticoagulant, anti-inflammatory, and antiviral activities. Protein hydrolysates from sea cucumbers have the potential as antioxidants with the ability to reduce free radicals. The objective of this research is to examine the chemical characteristics and antioxidant activity of protein hydrolysates from Bohadschia marmorata sea cucumber. The research method used in this study was experimental and laboratory analysis. The results showed that the chemical composition of fresh Bohadschia marmorata sea cucumber had high moisture content (80.45 %), ash content (4.12 %), low fat content (6.17 %), and low protein content (8.96 %). This could be due to the environmental conditions and nutrient absorption by Bohadschia marmorata sea cucumbers. Fifteen types of amino acids with a total of 53.81 % were obtained from this study. The yield obtained for crude papain enzyme concentration was 16.26 %, and for pure papain enzyme concentration, it was 11.23 %. The antioxidant activity with IC50 > 200 indicates very weak antioxidant activity, and the resulting molecular weight reached 73.93 kDa","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"6 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140375093","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

A NOVEL ANALYTICAL SOLUTION OF MERKEL EQUATION FOR COUNTERFLOW COOLING TOWERS 逆流式冷却塔梅克尔方程的新型解析解

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.20849

M. Y. Senawi

引用次数: 0

A CONCEPTUAL MODELING OF ULTRASONIC TOMOGRAPHY SYSTEM TO DETECT EARLY CARIES LESIONS 检测早期龋齿的超声波断层扫描系统的概念模型

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.20944

Nurul I’zaaz Mohd Zulkifli, J. Jamaludin, N. Ab Malik, Farah Aina Jamal Mohamad, Nik Halimaton Sadiah Nik Abdul Razak

{"title":"A CONCEPTUAL MODELING OF ULTRASONIC TOMOGRAPHY SYSTEM TO DETECT EARLY CARIES LESIONS","authors":"Nurul I’zaaz Mohd Zulkifli, J. Jamaludin, N. Ab Malik, Farah Aina Jamal Mohamad, Nik Halimaton Sadiah Nik Abdul Razak","doi":"10.11113/jurnalteknologi.v86.20944","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20944","url":null,"abstract":"\u0000\u0000\u0000\u0000Dental diagnostic imaging plays a significant role in the field of dentistry. In the oral environment, continuous demineralization and remineralization of tooth structure is common. Early diagnosis and monitoring of carious lesions are essential, and enamel abnormalities require quantitative imaging techniques. Among the imaging modalities available are radiography, X-ray computed tomography, and magnetic resonance imaging. However, to obtain imaging information on dental diagnostics, most of these systems rely on specific radiation and energy which might be harmful to health. To overcome the aforementioned problem, this research proposes a conceptual modeling of ultrasonic tomography system to detect enamel abnormalities using simulation from COMSOL software. Ultrasonic tomography can be obtained by the presence of acoustic waves transmitted from a source and the reflection of the waves at the investigated area. The transmission technique yielded 0.0041260 V for 7 MHz and 0.0003841 V for 25 MHz, but the reflection method yielded 0.000060 V for 7 MHz and 0.000211 V for 25 MHz. The transmission approach produces the greatest difference in voltage when compared to the reflection method. This suggests that, in comparison to the reflection technique, the transmission method is significantly better at detecting changes on the tooth surface.\u0000\u0000\u0000\u0000","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"69 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140376700","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

FORMULATING AND CHARACTERIZING AN OIL-IN-WATER PALM OIL FREE FATTY ACID-BASED NANOEMULSIONS FOR CRUDE OIL EXTRACTION PERFORMANCE 配制和表征水包油棕榈油不含脂肪酸纳米乳液的原油提取性能

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.20811

M. A. N. Aladin, M. H. V. Bahrun, Z. Kamin, Zainal Zakaria, Awang Bono

{"title":"FORMULATING AND CHARACTERIZING AN OIL-IN-WATER PALM OIL FREE FATTY ACID-BASED NANOEMULSIONS FOR CRUDE OIL EXTRACTION PERFORMANCE","authors":"M. A. N. Aladin, M. H. V. Bahrun, Z. Kamin, Zainal Zakaria, Awang Bono","doi":"10.11113/jurnalteknologi.v86.20811","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20811","url":null,"abstract":"Nanoemulsion is a promising medium for chemically enhanced oil recovery (cEOR) due to its ability to reduce interfacial tension and modify the wettability of reservoir rocks. This work focuses on formulating stable oil-in-water (O/W) nanoemulsions through high-energy ultrasonication method, with oleic acid as the primary component and is stabilized with a non-ionic Tween 40 surfactant in distilled water. Systematic experimental designs, employing response surface methodology (RSM), were implemented to develop polynomial models for various responses related to the dynamic and stability properties, and crude oil extraction performance. The p-value indicator (p-value < 0.05) is utilized to assess the significance of the models and independent variables. Overall, the formulation for achieving the lowest surface tension involves 0.41 wt.% oleic acid mixed with 0.81 wt.% Tween 40 at 60 °C. Meanwhile, the highest viscosity attained with 1.0 wt.% oleic acid mixed with 1.0 wt.% Tween 40 at 30 °C. For stable nanoemulsion, the best conditions are 1.69 wt.% oleic acid, sonicated for 15 minutes at 25 °C. Additionally, an optimal condition for effective crude oil extraction is at nanoemulsion preparation with sonication time of 15 minutes and contact time of 12 hours in the immersion experiment. To this end, this work contributes valuable insights into the formulation and characterization of stable oleic acid O/W nanoemulsions for potential EOR applications. The findings enhance understanding of nanoemulsion properties and their potential as effective agents in crude oil recovery.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"22 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140374807","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

ULASAN SENARIO PELEPASAN NANOZARAH SINTETIK KE EKOSISTEM AIR 审查合成纳米扎拉向水生生态系统的释放情况

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.19207

Nur Suraya Ahmad, Wan Zuhairi Wan Yaacob

引用次数: 0

COTTON AND POLYESTER TREATED WITH TRAGACANTH GUM LOADED WITH CLOVE ESSENTIAL OIL NANOEMULSION FOR MOSQUITO REPELLENTOL 使用丁香精油纳米乳液处理的棉和聚酯纤维的驱蚊效果

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.19862

Nurul Nabila Aini Abdullah, Azlan Kamari, S. T. S. Wong, Norjan Yusof, Hidayatulfathi Othman, Mohd Zobir Hussein, Justin S. J. Hargreaves

{"title":"COTTON AND POLYESTER TREATED WITH TRAGACANTH GUM LOADED WITH CLOVE ESSENTIAL OIL NANOEMULSION FOR MOSQUITO REPELLENTOL","authors":"Nurul Nabila Aini Abdullah, Azlan Kamari, S. T. S. Wong, Norjan Yusof, Hidayatulfathi Othman, Mohd Zobir Hussein, Justin S. J. Hargreaves","doi":"10.11113/jurnalteknologi.v86.19862","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.19862","url":null,"abstract":"Clove essential oil has been revealed to have a mosquito-repellent effect. Nevertheless, its application in topical preparations is minimal due to its immediate volatility. Nanoemulsion has been regarded as a promising carrier for essential oils. Here, we studied the effectiveness of cotton and polyester treated with tragacanth gum loaded with clove essential oil nanoemulsion to repel two mosquito species, namely Aedes aegypti (day biter) and Anopheles latens (night biter) for the first time. The nanoemulsion formulation was characterized using scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, zeta potential and polydispersity index. Tragacanth gum loaded with clove essential oil nanoemulsion formulation exhibits 98% encapsulation efficiency with a -42.3 mV zeta potential and 0.3 polydispersity index. Following 5 cycles of washing, 60% of the tragacanth gum loaded with clove essential oil nanoemulsion retained on cotton meanwhile 46% of the nanoemulsion formulation retained on polyester. From an Excito chamber study, 64% of Ae. aegypti were successfully repelled from cotton whereas 53% of the same mosquito species were repelled from polyester. Overall, the nanoemulsion treatment was able to functionalize the fabrics up to a \"very good\" level of repellence against mosquitoes even after 5 cycles of washing.\u0000 ","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"35 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140373782","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

DETERMINING GOOD DNA QUALITY OF FFPE CRC TISSUES VIA A MACRODISSECTION-DNA EXTRACTION PROTOCOL 通过大切片-DNA 提取规程确定 ffpe crc 组织的良好 dna 质量

Jurnal Teknologi Pub Date : 2024-03-27 DOI: 10.11113/jurnalteknologi.v86.20979

Ng Phei Ying, S. N. Mohd Nafi

{"title":"DETERMINING GOOD DNA QUALITY OF FFPE CRC TISSUES VIA A MACRODISSECTION-DNA EXTRACTION PROTOCOL","authors":"Ng Phei Ying, S. N. Mohd Nafi","doi":"10.11113/jurnalteknologi.v86.20979","DOIUrl":"https://doi.org/10.11113/jurnalteknologi.v86.20979","url":null,"abstract":"A good DNA quality and quantity from a formalin-fixed paraffin-embedded (FFPE) tissue sample is crucial for a better downstream genomic analysis. Previous research has focused on comparing FFPE DNA extraction kits, but the improvement in kit outcome has yet to be studied. This study aimed to make some modifications to a selected Qiagen DNA extraction manual protocol using a manual macrodissected FFPE colorectal cancer (CRC) tissue sample. A variety of DNA extraction protocol-related variables, such as washing steps, tissue sections, and FFPE tissue age have been investigated to determine the DNA quality and quantity of the FFPE tissues. The prechilled absolute ethanol washing step showed the highest DNA concentration with good purity ratios. One, two, or four tissue sections using the washing step were sufficient to obtain adequate DNA concentrations with acceptable DNA purity ratios. 1% or 2% agarose gel electrophoresis with the pre-casting method allowed better visualisation of FFPE DNA. Based on the ideal quality and quantity, we chose a manual macrodissected DNA extraction protocol employing 4 x 10 µm FFPE tissue sections generated in recent years with an optimised prechilled absolute ethanol washing step.","PeriodicalId":55763,"journal":{"name":"Jurnal Teknologi","volume":"45 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140377017","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