Sainteks: Jurnal Sains dan Teknik最新文献

{"title":"Pengujian Konsentrasi Aktivitas Anti Bakteri Terhadap Escherichia Coli dan Staphylococcus Aureus dari Ekstraki Etanol Daun Talas Bogor","authors":"Rini Siskayanti, M. Kosim, Muhammad Nitis Jiwana Ksatria","doi":"10.37577/sainteks.v4i1.400","DOIUrl":"https://doi.org/10.37577/sainteks.v4i1.400","url":null,"abstract":"Abstract: Talas Bogor (Colocasia esculenta L. Schott) is one of the non-rice carbohydrate sources which is quite rich in nutrients, and has a fairly high economic value. All parts of the taro plant contain flavonoids and saponins that function as antibacterial compounds by interfering with bacterial cells in the wound and exterminating fungi, thus helping the wound healing process. The purpose of this study was to test the activity of Escherichia coli and Staphylococcus aureus bacteria on Talas Bogor leaf extract and to determine the best concentration in inhibiting bacterial growth. There are two methods for this test, namely the spread method and the dilution method. In this study, the method used to test the antibacterial activity of Escherichia coli and Staphylococcus aureus bacteria on Bogor taro leaves was the disk diffusion method. Observational data obtained through the knowledge of presence or absence of a clear area formed around the paper disc is indicated by the growth of bacteria. The ethanol extract was carried out by macerating dry sample powder with 96% ethanol for 3 x 24 hours where the filtrate was evaporated with a rotating evaporator to obtain a thick Bogor Taro leaf extract. This test was carried out on several variations of concentration to determine the best antibacterial activity in inhibiting the tested bacteria. The concentration variations carried out were 1.25%, 2.5%, 5%, 10% and 15%. Based on the data, the diameter of the largest inhibition zone for Escherichia coli was 15% with diameter of an inhibition zone 14.11 mm, while for Staphylococcus aureus it was 15% with diameter of an inhibition zone 16.51%. The positive control used was chloramphenicol while the negative control was 20% sterile DMSO. \u0000 \u0000 \u0000Abstrak: Talas Bogor (Colocasia esculenta L. Schott) adalah salah satu tanaman sumber karbohidrat bukan beras yang cukup kaya akan gizi, dan memiliki nilai ekonomi yang cukup tinggi. Seluruh bagian tanaman talas mengandung flavonoid dan saponin yang berfungsi sebagai senyawa antibakteri dengan mengganggu sel bakteri di dalam luka serta pembasmi fungi, sehingga turut membantu proses penyembuhan luka. Tujuan dari dilakukannya penelitian ini adalah sebagai pengujian aktivitas antibakteri Escherichia coli dan Staphylococcus aureus pada ekstrak daun Talas Bogor serta mengetahui konsentrasi terbaik dalam menghambat pertumbuhan bakteri. Ada dua metode untuk pengujian ini yaitu dengan cara metode penyebaran dan metode pengenceran. Pada penelitian ini, metode yang digunakan untuk pengujian aktivitas antibakteri dari Escherichia coli dan Staphylococcus aureus terhadap daun talas Bogor ialah dengan metode penyebaran (disk diffusion method). Data pengamatan yang didapat berupa tampak atau tidaknya daerah bening yang terbentuk di sekeliling kertas cakram ditunjukkan dengan pertumbuhan bakteri. Ekstrak etanol di lakukan dengan cara serbuk sampel kering di maserasi dengan etanol 96% selama 3 x 24 jam dimana filtrat nya diuapkan dengan","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133131193","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}

{"title":"Optimasi Pengolahan Limbah Cair Textile Menggunakan Metode Sono-Fenton","authors":"Riza Rizkiah, L. Luciana","doi":"10.37577/sainteks.v4i1.388","DOIUrl":"https://doi.org/10.37577/sainteks.v4i1.388","url":null,"abstract":"The textile and textile product (TPT) industry is one of the mainstay commodities that drive the economy in Indonesia. Export market opportunities are very open for this commodity, but the current problem is the waste generated from this industry. PT.Vonex is a textile industry with spinning and dyeing products. Textile liquid waste produced has a very concentrated color characteristic and when the dye enters the waters it can cover the surface of the water body so as to block sunlight from entering the waters. Textile wastewater treatment with the sono-Fenton method as DCA (Decolorizing Agent) can be used as an alternative choice in overcoming these problems. In this study, an analysis of the reduction of the dye was carried out by using variations in the concentration of Fenton's reagent and the length of sonication time. The variations in the concentration of Fenton's reagent used were 1:1, 2:1, 4:1, and 6:1 while the sonication time used variations of 10, 30, 60 and 90 minutes. The test results show that the use of Fenton's reagent assisted by ultrasonic waves (sonication) in textile wastewater treatment can reduce the levels of color values, pH, COD, BOD, and TSS. The results showed that the variation of Fenton reagent concentration 1:1 with a sonication time of 30 minutes was the optimum condition with a percentage decrease in color value of 99.61%, a decrease in pH value of 68.94%, a decrease in COD value of 90.64%, a decrease in BOD levels by 97.48%, and a decrease in TSS levels by 91.28%.","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131525260","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}

{"title":"Re-Layout Of STNK Annual Tax Payment At The XXX Samsat Office By Promodel Simulation","authors":"Tombak Gapura Bhagya","doi":"10.37577/sainteks.v4i1.401","DOIUrl":"https://doi.org/10.37577/sainteks.v4i1.401","url":null,"abstract":"Re-layout is an action that requires a large amount of money if done manually. So it is necessary to use technology to minimize the cost of re-layout. Simulation is one solution that can be applied in solving problems related to layout improvement. The SAMSAT XXX office experienced a very heavy queuing problem, so it was necessary to improve the layout by changing the position of the service office. By using the modeling system, the STNK tax service system can be created in a virtual system and a new layout is created using the promodel. The results indicate the need for additional registration counters from the initial one consisting of only one counter to three counters, and this has the effect of increasing the productivity of payment counters and delivery counters by up to 15%. So that the productivity burden of the three counters at the SAMSAT XXX office has the same load.","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128865810","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}

{"title":"Pemodelan Pengeringan Menggunakan Microwave Dengan Model Relative Energy Activation (REA) Untuk Pengeringan Kacang Hijau Berbentuk Sphere","authors":"Johannes Martua Hutagalung","doi":"10.37577/sainteks.v4i1.386","DOIUrl":"https://doi.org/10.37577/sainteks.v4i1.386","url":null,"abstract":"One of the advantages of the REA model is that the relative activation energy equation obtained from the experimental data can be used for other drying conditions with the same initial material and moisture content. Through convective data, an equation of activation energy is obtained which will be used for drying the data using a microwave. The simulation carried out is to compare the model data with experimental data of a microwave with a power of 0.25 W/g and a drying air temperature of 50 0C, then a power of 0.7 W/g and a drying temperature of 70 0C. increasing with microwave, the higher the value of the heat transfer coefficient (h) the simulation results are getting closer to the experimental data for the initial period of development, even making experimental data with increasing time.","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129073531","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}

{"title":"Analisis Stabilitas Tanggul Penahan Tanah Pedestrian Zona II Situ Bagendit","authors":"Tiara Nurhuda","doi":"10.37577/sainteks.v4i1.399","DOIUrl":"https://doi.org/10.37577/sainteks.v4i1.399","url":null,"abstract":"Abstract: Situ Bagendit is one of the natural tourism areas in Garut Regency with an area of 124 Ha. Besides being a tourist attraction, Bagendit Lake is also a suggestion for irrigation in the surrounding area. In addition to channeling irrigation, earth retaining embankments built together with pedestrians must also meet the safety requirements of stability. This study aims to determine the value of the safety factor of the Situ Bagendit embankment against slipping and overturning. To determine the value of stability, the forces and moments acting on the embankment and water are analyzed. The value of slip or shear stability is 1.73 and the value of rolling stability is 2.1, where the value is categorized as safe because it is more than 1.25. It was concluded that the Situ Bagendit II embankment was categorized as safe against sliding and overturning \u0000Abstrak: Situ Bagendit merupakan salah satu kawasan wisata alam di Kabupaten Garut dengan luas 124 Ha. Selain menjadi objek wisata, situ Bagendit juga sebagai saran irigasi di daerah sekitar. Disamping untuk menyalur irigasu, tanggul penahan tanah dibangun bersamaan dengan pedestrian juga harus memenuhi persyaraytan aman dari stabilitas. Penelitian ini bertujuan untuk mengetahui nilai faktor aman tanggul Situ Bagendit terhadap gelincir dan guling. Untuk mengetahui nilai stabilitas maka dianalisis gaya-gaya dan momen yang bekerja pada tanggul dan air. Nilai stabilitas gelincir atau geser adalah 1,73 dan nilai stabilitas guling adalah 2,1, dimana nilai tersebut dikategorikan aman karena lebih dari 1,25. Dissipulkan bahwa tanggul Situ Bagendit II dikategorikan aman terhadap geser maupun guling","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131853905","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}

{"title":"Pengaruh Konsentrasi Resin dan Suhu Pemanas Awetan pada Penyempurnaan Lipatan Permanen Kain Poliester 100%","authors":"Feny Nur Herawati","doi":"10.37577/sainteks.v3i2.332","DOIUrl":"https://doi.org/10.37577/sainteks.v3i2.332","url":null,"abstract":"Permanent press by using resin will increase the resistance of the desired material properties. The refinement process to obtain permanent fold properties in polyester fibers is obtained by forming a polymer resin layer on the surface of the fabric. The more resin used, the less the ability of the fabric to come back from the crease, so the permanent crease finish will be more permanent. \u0000However, with more and more resin polymerizing on the surface, the fabric will be stiffer and can reduce the tensile strength of the fiber, the occurrence of the resin polymerization process is influenced by the temperature of the preserved heating when the temperature is less then the resin is not formed perfectly or if the temperature is too high it can cause damage to the fiber. This test was carried out on 100% polyester fabric with variations in the concentration of melamine formaldehyde resin 40 g/l, 50 g/l, 60 g/l, 70 g/l and variations in the curing temperature of 1600C, 1700C, 1800C, 1900C. Tests carried out include re-testing of the folds and tensile strength of the fabric. The results showed that the optimum conditions achieved in this experiment were at a concentration of melamine formaldehyde resin of 60 g/l with a preserved heating temperature of 1700C, a low folding angle value of 740 was obtained with a tensile strength value that above the minimal standards, namely the warp 75.7 Kg and weft 22.7 Kg.","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131618952","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}

{"title":"Proses Bleach Washing pada Kain Denim yang Dicelup dengan Zat Warna Indigo Menggunakan Natrium Hipochlorit (NaOCl)","authors":"L. Luciana, Elly Koesneliwati","doi":"10.37577/sainteks.v3i2.333","DOIUrl":"https://doi.org/10.37577/sainteks.v3i2.333","url":null,"abstract":"The process of bleach washing on denim fabrics produces a paler or lighter shabby effect. The shabby effect is produced by using an oxidizing agent. The application of sodium hypochlorite can cause a decrease in color aging of denim fabrics and high tensile strength. The pH condition also affects the occurrence of oxycellulose damage which will affect the final result. Inappropriate pH will cause a very high oxidation process and produce a less shabby effect and can cause a decrease in tensile strength. Therefore, the concentration of NaOCl and pH must be adjusted properly so that optimal results are obtained. The purpose of this study was to determine the effect of optimum concentration of sodium hypochorite (NaOCl) and pH on the physical properties of denim fabric. After the process of bleach washing process experiment was carried out, a test was carried out based on two-factor Anova statistical data and the optimum visual test fabric results were obtained at a NaOCl concentration of 2 g/L using alkaline pH (10-11). The test values were obtained as follows: color fastness to rubbing are 3-4 for dry, 2-3 for wet, tensile strength 67.4 kg in warp direction, 43.1 in weft direction, fabric stiffness in warp direction 430.48, weft direction 344.54. The factory standard for a tensile strength of 65 kg warp direction, 40 kg weft direction, color fastness to rubbing 3 for dry rubbing and 2 for wet rubbing. \u0000Keywords: bleach washing, denim, sodium hypochlorite, oxycellulose, color fastnes  \u0000 ","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124423138","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}

{"title":"Pengaruh Variasi Timing Opening Angle Terhadap Jumlah Weft Stop pada Pertenunan Kain dengan Anyaman Keper 2/1 1 di Mesin Air Jet Loom","authors":"Filly Pravitasari, Afriani Kusumadewi","doi":"10.37577/sainteks.v3i2.334","DOIUrl":"https://doi.org/10.37577/sainteks.v3i2.334","url":null,"abstract":"In the weaving process, the process of launching the weft yarn is an important thing to consider. One of the obstacles that often occurs in the process of launching feed using a water jet loom machine is the amount of feed stuck (weft stop). The cause of the weft stop is because the process of opening the warp mouth is not clean and the weft thread slides inappropriately or too fast so that the warp mouth is in a small condition. Variations in timing opening angle of 700, 800 and 900 determine the size of the warp mouth opening, the time the weft will slide and the time the weft will arrive. From the three variations of the timing opening angle, the number of weft stops at the timing opening angle of 800 is smaller than the timing opening angle of 700 and 900, which is namely the number of big loops 0.6 times and end loops 0.8 times per hour.","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123664172","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}

{"title":"Analisis Faktor-faktor yang Mempengaruhi Pengguna Aplikasi Virtual Hotel Operator di Indonesia dengan MTAM","authors":"Graha Prakarsa, Vani Maharani Nasution","doi":"10.37577/sainteks.v3i2.336","DOIUrl":"https://doi.org/10.37577/sainteks.v3i2.336","url":null,"abstract":"Inti permasalahan dari penelitian ini yaitu pesatnya tren virtual hotel operator di Indonesia sehingga perlu untuk mengukur penerimaan terhadap teknologi mobile ini menggunakan MTAM. Penelitian ini merupakan penelitian kuantitatif, dengan menggunakan metode deskriptif dan teknik analisis data regresi linier berganda. Hasil penelitian ini menunjukan bahwa mobile perceived facilitating condition dan mobile perceived compatibility berpengaruh signifikan secara parsial maupun simultan terhadap mobile perceived usefulness dan mobile perceived ease of use. Kemudian mobile perceived usefulness dan mobile perceived ease of use berpengaruh signifikan secara parsial dan simultan terhadap consumer intention to use. Berdasarkan hasil penelitian ini menunjukan bahwa setiap variabel yang diuji dapat dengan baik mempengaruhi variabel lain, namun perlu dikembangkan lagi pelaksanaan konkritnya pada aplikasi virtual hotel operator. \u0000 ","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125709494","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}

{"title":"Optimasi Persediaan Bahan Baku Deker melalui Metode Material Requirement Planning pada CV Ajax Sport","authors":"Tombak Gapura Bhagya, Elly Komala","doi":"10.37577/sainteks.v3i2.343","DOIUrl":"https://doi.org/10.37577/sainteks.v3i2.343","url":null,"abstract":"Inventory of raw materials is the initial process in planning and controlling production. Because by planning and controlling raw materials, it becomes one of the processes to produce an optimal production system. In order for raw material inventory to be controlled, the MRP method is used in its completion. In the case study at CV Ajax Sport, it is known that controlling raw material inventory using MRP produces an inventory value of Rp. 139,911,944,- for 12 weeks, with the number of orders for F300 raw materials as many as 71,716 units and for G300 raw materials as many as 67,297 units. And this value shows a very large value both financially and product units, so it must be managed appropriately and accurately.","PeriodicalId":434078,"journal":{"name":"Sainteks: Jurnal Sains dan Teknik","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116369749","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}