Journal of Science and Application Technology (JSAT - Institut Teknologi Sumatera)
Not a member yet
656 research outputs found
Sort by
Worksop on Making Hand Sanitizers and Introduction to Assembling Sensor-Based Containers at SMK Yadika Pagelaran
No full textThe Covid-19 pandemic, which has been endemic since the end of 2019, is still ongoing. Through the Decree of the Minister of Health of the Republic of Indonesia Number HK. 01. 07/MENKES/382/2020 concerning Health Protocols for the community in public places and facilities to prevent and control coronavirus disease 2019 (Covid-19. Schools are one of the pioneers in implementing government policies, in this case, Yadika Pagelaran Vocational High School, so the entire school environment must technically know how to prevent and control the coronavirus. Implementation of activities is held with face-to-face presentations on how to make hand sanitizers, followed by the practice of making hand sanitizers and the introduction of sensor-based hand sanitizer containers. The whole series of activities was well done. The initial test and post-test revealed that participants' knowledge of hand sanitizers increased from an average score of 64 to 80.44. This activity is vital to support the government in presenting schools that implement health protocols
A Quantitative Risk Analysis Due to Leakage of Ammonia Storage Tank at PUSRI IIB Factory
No full textAmmonia products in industry are usually stored in a cold state which is maintainedat a temperature of -33 C in a liquid state (refrigerated storage tank). One of thechemical industry companies that produces ammonia and has been established in themid-20th century is PT Pupuk Sriwijaya Palembang. One method that can be used topredict the scenario of an ammonia tank leak is by quantitative risk analysis. Thepurpose of this study is to identify the effect of the leakage of the ammonia storage tankat the Pusri IIB factory, calculate the concentration of ammonia scattered per unitdistance and calculate the distance affected by thermal radiation and toxic gases fromthe source of the leak, and compare the calculation results (manual) with the simulationresults with the device. ALOHA software. The tool used in the ALOHA simulation is alaptop with the following specifications: Lenovo Thinkpad T440p, Intel® CoreTM i5-400M, 8 GB RAM, 64-bit OS. The effects of ammonia storage tank leaks or accidentsdue to tank leaks that may occur after the ALOHA simulation are pool fire, BLEVE,toxic vapor cloud, and flammable area of vapor cloud. In scenario 1 for the impact ofpool fire thermal radiation (>10 kW/m2), the resulting red zone is 36 m. Probit analysisof the impact of pool fire was also carried out, with probit 1st degree burns it couldallow 261 people to be exposed at a distance of 45 meters and 14-16 people at adistance of 75 meters. For the BLEVE impact, the resulting red zone is up to 1.2 kmwith probit analysis of 1st degree burns in the dry season scenario, the possibility ofpeople being exposed is 9,007 people at a distance of 1,000 meters and 3,126-4,002people at a distance of 2,000 meters. While the spread of toxic gas (toxic vapor cloud),the red zone (ERPG-3) produced is 269 m. The worst impact for the occurrence of apool fire can reach 58 meters from the source of emission or tank leakage, BLEVEreaches 2.7 km, toxic area reaches 2.3 km, and flammable area reaches 60 meters. Therecommendations given in this study are checking the instruments on the tank,installing a lightning rod on the tank, and risk analysis is needed to anticipate tankleaks and avoid making densely populated settlements within 2 km of the ammoniatank
Pengaruh Substitusi Tepung Biji Nangka (Artocarpus heterophyllus Lam) Terhadap Karakteristik Organoleptik dan Fisikokimia Biskuit
No full textBiskuit merupakan kue kering yang banyak digemari dan merupakan makanan wajib yang sering disajikan terutama pada hari raya. Biskuit yang terbuat dari tepung terigu diolah dengan cara dicampur, dicetak dan dipanggang. Perlu dikembangkan biskuit berbahan tepung lokal untuk mengurangi konsumsi tepung terigu, seperti tepung biji nangka. Tujuan penelitian ini adalah untuk mengetahui pengaruh substitusi tepung biji nangka terhadap karakteristik organoleptik dan tekstur biskuit serta memperoleh data ilmiah tentang karakteristik fisikokimia biskuit dengan substitusi tepung biji nangka untuk perlakuan terbaik. Biskuit dibuat dengan berbagai perbandingan tepung biji nangka dan tepung terigu yaitu (0:100 (kontrol), 25:75, 50:50, 75:25, dan 100:0). Biskuit terbaik berdasarkan uji kesukaan dengan substitusi tepung biji nangka sebesar 25% dan uji ranking mendapatkan hasil terbaik pada konsentrasi 25% dan 50%. Biskuit tepung biji nangka sebanyak 25% memiliki nilai tekstur 1800,25 g; kadar air 8,49%; kadar abu 1,64%; kadar protein 7,40%; kadar lemak 19,46% dan karbohidrat 62,09%. Biskuit dengan substitusi tepung biji nangka 50% memiliki nilai tekstur 1207,625 g; kadar air 9,86%; kadar abu 2,00%; kadar protein 6,22%, kadar lemak 26,43%; dan karbohidrat 56,32%
STRATEGIES FOR LAUNCHING NEW FACE TONER PRODUCTS: : INSIGHTS DERIVED FROM INSTAGRAM BEAUTY INFLUENCER REVIEWS
Get PDFThe rapid and dynamic evolution of the cosmetics industry in Indonesia necessitates an equally dynamic approach to innovation and technology integration. The introduction of novel cosmetic products assumes paramount importance for businesses striving to not only thrive but excel within this fiercely competitive market. A compelling strategy for the successful launch of such products involves a comprehensive exploration of digital marketing avenues, with an emphasis on exploiting the vast landscape of social media platforms. In the context of introducing new products, particularly face toners, meticulous market research on widely embraced social media platforms like Instagram becomes an imperative. This research is dedicated to the meticulous scrutiny of recently unveiled face toner products in the year 2023, aiming to discern their prominence in user-generated comments within the domains of beauty influencer reviews. The focus of this analysis revolves around three distinctive products as Azarine, Aubree, and Elsheskin. The meticulous qualitative analysis of the amassed comment data has uncovered that the prominence of these products is not solely attributed to their efficacy; rather, it is significantly influenced by the allure of their packaging design and vibrant color schemes. This research serves as an invaluable resource for aspiring entrepreneurs and established cosmetic companies embarking on the endeavor to introduce fresh face toner products. The findings underscore the profound impact of product quality, aesthetics, and strategic marketing efforts in establishing a robust foothold in the fiercely competitive cosmetics market. Furthermore, this study unveils the strategies essential for the efficacious introduction and promotion of novel products in this dynamic industry
Optimization of Carbopol 940 and Glycerol Concentration in Antioxidant Gel of Alstonia scholaris L. Leaf extract with Simplex Lattice Design Method
Get PDFAlstonia scholaris L. contains several compounds, which has been proven to be potential as skin protection by formulating in gel preparation. The aims of this study was to obtained the concentration of carbopol 940 and glycerol to produce an optimal gel preparation of Alstonia scholaris L. leaf extract. Simplex lattice design was used as optimization method with two independent variable, carbopol 940 (0.5%-2.5%) as gelling agent and glycerol (14%-16%) as humectant. There were 5 formulas carried out to physical properties evaluation: organoleptic, homogeneity, spreadability, pH, adhesion time and viscosity. The result showed that the prediction of optimal formula from SLD method with 1.67% carbopol 940 and 14.83% of glycerol. The physical properties of optimal formula was 5.206±0,125 of pH value; 28,768.24±4,608.11 cP of the viscosity value; 5.96±0,087 cm of spreadability value; and 55.146±1.174 seconds of adhesion. There was no significant difference of SLD prediction responses with observation respons
The Effectiveness of Directed Drilling Track Planning Method with Variation of Build Up Rate
No full textThe build-up rate test in this case study was carried out using three BUR variables, namely 30/100 ft, 50/100 ft, and 70/100 ft, which were simulated using the directional drilling trajectory method. The results of each BUR obtained when using the build and hold drilling trajectory method resulted in a maximum inclination angle of 39.1970, 31.8540, and 30.0930; the vertical section depth to the end of the build were 1707.02 ft, 1104.77 ft and 910.41 ft; the measured depths to the end of the build were 1807 ft, 1137 ft, and 930 ft; and the measured depths to the target point were 2584 ft, 2556 ft, and 2547 ft. While the results of each BUR obtained when using the buildup drilling trajectory method resulted in a maximum inclination angle of 56,680, 76,2890 and 95.5620; the vertical section depth to the end of the build of 2269.92 ft, 2298.22 ft and 2311.95 ft; measured depths to the end of the build of 2563 ft, 2711 ft and 2886 ft; and the measured depth to the target point were 2636 ft, 2759 ft and 2886 ft. BUR comparisons performed on these two methods have advantages and disadvantages in terms of the analyzed parameters. This parameter can affect drilling risk, drilling time efficiency, and econom
Fenomena Intrusi Air Laut di Daerah Pesisir Hunuth, Kecamatan Teluk Ambon, Kota Ambon, Maluku
Get PDFOne of the research areas to determine the phenomenon of seawater intrusion through analysis of the physical and chemical characteristics of groundwater is in the Coastal area of Hunuth Village, Teluk Ambon District, Ambon City, Maluku. The coastal community of Hunuth Village utilizes groundwater to meet their daily water needs. However, due to the existence of residential areas close to the coast, the groundwater in this area has been polluted or intruded by sea water.The results showed that groundwater with high pH values was shown in areas far from the shoreline (northern part of the study area), while high TDS, salinity and DHL values were generally found in groundwater samples close to the shoreline. The groundwater facies in the study area show the types of Ca-HCO3 (calcium and bicarbonate), types of Na-HCO3 (sodium and bicarbonate), and types of Na-Cl (sodium and chloride). Areas close to the shoreline have experienced seawater intrusion as indicated by DHL values > 229.25 mho/cm, Cl/HCO3 ratio values which are generally > 2.80 meq/l, and groundwater facies with the type of Na-Cl (sodium and sodium chloride). Therefore, it is necessary to treat water before it is used as drinking water, buy bottled drinking water or use the services of a water company for polluted wells, and build a dam in the northern part of the study area which has a flat topography. trees to retain water, so that fresh water can easily push salt water into groundwater aquifers in the study area
Variasi Pola Sidik Bibir Pada Siswa Penyandang Down Syndrome dari Beberapa Sekolah di Kota Bengkulu
Get PDFABSTRAK
Down Syndrome merupakan kelainan genetik autosomal karena kelebihan pada jumlah kromosom21 (Trisomi). Salah satu kekhasan pada penyandang down syndrome adalah mulut selalu terbuka, bibir memiliki celah dan relatif tebal. Tujuan dari penelitian ini adalah untuk menganalisis karakteristik pola sidik bibir pada penyandang down syndrome. Penelitian dilakukan pada bulan Desember 2021-Februari 2022 menggunakan metode wawancara dan pendataan langsung terhadap siswa penyandang down syndrome yang memenuhi syarat inklusi dari beberapa sekolah di Kota Bengkulu. Identifikasi pola sidik bibir mengacu pada klasifikasi menurut Suzuki dan Tsuchihashi. Data dianalisis menggunakan uji Chi-square pada program SPSS versi 22. Hasil penelitian menunjukkan bahwa pada siswa penyandang down syndrome ditemukan dua pola sidik bibir yaitu tipe I dan tipe II dengan pola dominan pada tipe I. Persentase pola sidik bibir tipe I pada siswa laki-laki sebesar 66,7% dan pada siswa perempuan 57,1%. Pola sidik bibir tipe II pada siswa laki-laki sebesar 33,3% dan pada siswa perempuan 42,9%. Berdasarkan hasil analisis menggunakan uji Chi-square, tidak terdapat hubungan antara pola sidik bibir dengan rasio tebal bibir dan panjang bibir, serta tidak terdapat hubungan antara pola sidik bibir dengan kemampuan berbicara, kemampuan berjalan, kemampuan menggenggam pena dan kemampuan menulis pada siswa penyandang down syndrome dari beberapa sekolah di kota Bengkulu. Pola sidik bibir dominan tipe I dan II yang ditemukan pada siswa penyandang down syndrome juga umum ditemukan pada non-down syndrome.
Kata Kunci: Cheiloscopy, Down syndrome, Pola sidik bibir
ABSTRACT
An excess of chromosomal number 21 (Trisomy) causes the autosomal genetic disease known as down syndrome. One of the characteristics of people with down syndrome is that their lips have a gap and are rather thick, and their mouths are always open. This study's objective was to examine the characteristics of down syndrome students' lip print patterns. The study was carried out at multiple schools in Bengkulu City between December 2021 and February 2022 using interviews and direct data collecting on Down syndrome pupils with inclusion requirements. The classification of Suzuki and Tsuchihashi is used to identify lip print patterns. The Chi-square test was used to examine the data in SPSS version 22. Data were analyzed using the Chi-square test in the SPSS version 22. The findings indicated that students with Down syndrome had type I and type II lip print patterns, with type I predominating. Male students had a type I lip print pattern prevalence of 66.7%, compared to 57.1% for female students. 33.3% of male students have type II lip print patterns, compared to 42.9% of female students. According to the Chi-square analysis, there is no correlation between lip print patterns, the ratio of lip thickness to lip length, and speaking, walking, pen grasping, and writing abilities in down syndrome from various schools in Bengkulu city. Since the dominating lip print pattern of types I and II observed in down syndrome students is also frequently shown in non-down syndrome individuals, this pattern cannot be used to predict specific motor skills in down syndrome students.
Keywords: Cheiloscopy, Down syndrome, Lip print pattern
PHYTOCHEMICAL SCREENING AND FREE RADICAL–SCAVENGING ACTIVITY OF ORTHOSIPHON STAMINEUS (CAT WHISKERS) LEAVES
Get PDFOrthosiphon stamineus, commonly known as "Cat's Whiskers" or "Java Tea," is a medicinal herb found in Southeast Asian nations, known for its historical use in treating various ailments. This study aimed to extract and analyze the phytochemical composition of Orthosiphon stamineus using the maceration technique, followed by an assessment of its antioxidant potential through the DPPH assay. The phytochemical screening revealed the presence of flavonoids, saponins, and tannins, which align with prior research. Notably, the plant contains polyphenolic compounds, with flavonoids like sinensetin and eupatorin, as well as terpenoids, including labdane diterpenes. Essential oils, mainly composed of monoterpenes and sesquiterpenes, were also identified. While alkaloids like orthosiphol C have been reported, they were not detected in this research. The DPPH assay demonstrated that the extract exhibited increasing inhibitory activity against DPPH radicals with higher concentrations, indicating its potential as a natural antioxidant source. The presence of rosmarinic acid and flavonoids suggests potential antioxidant effects that may be explored further. Overall, this study provides insights into the phytochemical profile of Orthosiphon stamineus and its potential benefits, particularly in skin anti-aging. Further research is needed to fully understand the pharmacological significance of its compounds
KELAYAKAN PENYEDIAAN INFRASTRUKTUR AIR BERSIH KAWASAN PESISIR BERDASARKAN PERSEPSI MASYARAKAT (KECAMATAN TELUK BETUNG TIMUR, KOTA BANDAR LAMPUNG)
Get PDFWater is essential for the activities and maintenance of human life, such as meeting daily household needs. Clean water is an integral part of who gets priority in urban planning. The importance of clean water for human life, clean water infrastructure required management well and deserved. Directorate General of Human Settlements, PUPR (2007), explains Bandar Lampung City uses PDAM Way Rilau as a pipe network for clean water services. One area of Bandar Lampung City experiencing clean water problems is the Teluk Betung Timur Coastal Area. The issue of providing clean water infrastructure in coastal areas is the quantity of clean water infrastructure, distribution of clean water, and clean water quality consisting of clean water quantity, continuity, and physical quality. This research aims to review the feasibility of providing clean water infrastructure in coastal areas based on the public perception in Teluk Betung Timur District. This research used the descriptive analysis method to explain existing conditions and monitor the feasibility of providing infrastructure clean water in the research areas. After that needs to be calculated is used with the methods weighting to judge the feasibility of delivering clean water infrastructure in coastal areas of Teluk Betung Timur District. Based on the analysis results, the provision of infrastructure clean water in coastal areas of the Teluk Betung Timur District. They are still lacking worth. This inadequacy is identified in the quantity of clean water infrastructure, distribution, and quality of clear water