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INDONESIA
Jurnal Penelitian Saintek
Published by Universitas Negeri Yogyakarta
ISSN : 14123991     EISSN : 25287036     DOI : 10.21831
Core Subject : Science,
Decision Sciences, Operations Research & Management
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 27, No 1 (2022)" : 8 Documents clear
Rancang Bangun Sistem Informasi Penjualan pada CV.Kaos SisBro Berbasis Website Mulyawan, I Putu Ivan Wiartadi; Putra, I Nyoman Tri Anindia; Sutarwiyasa, I Ketut
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.36844

Abstract

CV.Kaos SisBro merupakan perusahaan yang bergerak dibidang konveksi.Perusahaan ini mempunyai salah satu keunggulan dalam menjalankan bisins konveksi ini yaitu perusahaan ini dapat mencetak satuan dalam artian satu buah baju, satu buah topi, satu buah jersey dan sebagainya. Dan salah satu keunggulan dari perusahaan ini adalah dalam melakukan pemesanan, pelanggan dapat membayarkan uang muka terlebih dahulu. Dengan kedua keunggulan tersebut, perusahaan ini sangat menarik minat konsumen untuk mencetak baju, topi, jersey dan sebagainya dengan jumlah satuan. Untuk menunjang proses pencatatan sampai pelaporan maka akan dirancang sistem informasi penjualan berbasis web untuk CV.Kaos SisBro, yang diharapkan dapat membantu kelancaran dalam proses pemesanan sampai pelaporan. Penelitian ini menggunakan metode pengumpulan data primer dan sekunder dalam proses perancangan dan pembangunan sistem informasi penjualan.
Analisis toksisitas dan potensi antikanker ekstrak metanol daun Majapahit (Crescentia cujete) dengan metode Brine Shrimp Lethality Test Fatimah Fatimah; Rahma Diyan Martha; Danar Danar
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.43889

Abstract

Tanaman Majapahit (Crescentia cujete) merupakan salah satu tanaman di Indonesia yang diketahui memiliki senyawa fenolat, saponin, tanin, alkaloid, dan terpenoid. Beberapa jenis senyawa yang termasuk kedalam golongan fenol diketahui memiliki aktivitas antikanker. Pada penelitian ini dilakukan untuk mengetahui toksisitas ekstrak metanol daun Majapahit menggunakan metode Brine Shrimp Lethality Test (BSLT). Pada uji toksisitas menggunakan metode BSLT digunakan lima konsentrasi ekstrak metanol daun Majapahit, yaitu; 500, 400, 300, 200, dan 100 ppm. Ekstrak tersebut kemudian di ujikan pada larva udang Artemia salina L. umur 48 jam. Pada tiap konsentrasi digunakan 10 ekor larva dengan tiga kali pengulangan. Data kematian larva tiap konsentrasi, kemudian di lakukan analiais probit untuk menentukan nilai LC50. Berdasarkan hasil analisis probit dari kematian larva udang pada tiap konsentrasi ekstrak, dapat diketahui bahwa nilai LC50 ekstrak metanol daun Majapahit adalah 642,877ppm. Oleh karena itu, dapat dikatakan bahwa ekstrak bersifat toksik dan berpotensi dikembangkan sebagai antikanker karena memiliki nilai LC50 1000 ppm.Analysis of toxicity and anti-cancer potential of Majapahit (Crescentia cujete) leaf methanol extract using Brine Shrimp Lethality Test methodThe Majapahit plant (Crescentia cujete) is one of the plants in Indonesia which is known to have phenolic compounds, saponins, tannins, alkaloids, and terpenoids. Several types of compounds belonging to the phenol group are known to have anticancer activity. The study aimed to determine the toxicity of the methanol extract of the leaves of Majapahit using the Brine Shrimp Lethality Test (BSLT) method. Toxicity test was done using five concentrations of Majapahit leaf methanol extract, there were 500, 400, 300, 200, and 100 ppm. The Majapahit extract was then tested on Artemia salina L. shrimp larvae aged 48 hours. At each concentration, ten larvae were used with three repetitions. Larvae mortality data for each concentration of the extract would be used to carried out probit analysis to determine the LC50 value. Based on the results of the probit analysis of the mortality of shrimp larvae at each extract concentration, it could be seen that the LC50 value of the Majapahit leaf methanol extract is 642.877ppm. So, it means that the extract is toxic and has the potential to be developed as an anticancer because it has an LC50 value of 1000 ppm.
Aplikasi VIS/NIR spectroscopy dan partial least square regression untuk pendugaan nilai warna kulit buah cabai rawit Kusumiyati Kusumiyati; Ine Elisa Putri; Wawan Sutari; Jajang Sauman Hamdani
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.47930

Abstract

Warna kulit buah buah cabai rawit (Capsicum Frutescens L.) merupakan salah satu indikator dari kematangan buah. Visible/near infrared (Vis/NIR) spectroscopy merupakan teknologi alternatif untuk memprediksi warna kulit buah yang dikombinasikan dengan partial least square regression (PLSR). Penelitian ini bertujuan untuk memprediksi warna kulit buah cabai rawit menggunakan Vis/NIR spectroscopy. Analisis di Laboratorium Hortikultura, Fakultas Pertanian, Universitas Padj+!adjaran. Sampel yang digunakan yaitu buah cabai rawit var. Domba. Sampel dibagi ke dalam 3 grup, buah cabai rawit hijau, oranye, dan merah. Spectrometer yang digunakan yaitu NirVana AG410 dengan panjang gelombang 300-1065 nm dengan interval 3 nm. Semua data absorban dikoreksi dengan menggunakan metode prapengolahan spektra multiplicative scatter correction (MSC), orthogonal signal correction (OSC), dan standard normal variate (SNV). Hasil penelitian menunjukkan bahwa prapengolahan spektra terbaik untuk memprediksi L*dan b* pada buah cabai rawit yaitu PLSR+OSC sedangkan a* yaitu PLSR+SNV. Nilai akurasi L* dengan OSC yaitu R kalibrasi = 0,99 dan b* dengan OSC yaitu R kalibrasi = 0,76. Akurasi pada a* dengan SNV menghasilkan R kalibrasi = 0.99. Penelitian ini membuktikan bahwa Vis/NIR spectroscopy dan PLSR memiliki akurasi yang tinggi dan dapat digunakan untuk memprediksi warna kulit buah cabai rawit.Application of VIS/NIR spectroscopy and partial least square regression for estimation of skin color in cayenne pepper fruitThe skin fruit color of cayenne pepper (Capsicum Frutescens L.) is one of indicators of fruit maturity. Visible/near infrared (Vis/NIR) spectroscopy is alternative technology to predict of skin color fruit combined with partial least square regression (PLSR). The research was aimed to predict skin color fruit of cayenne pepper using Vis/NIR spectroscopy. Analysis at Horticulture Laboratory, Faculty of Agriculture, Universitas Padjadjaran. The samples used was cayenne pepper var. Domba. The smples were divided into 3 groups, green, orange red cayenne pepper. The spectrometer used was NirVana AG410 spectrometer with 300 to 1065 nm with 3 nm intervals. All of absorbance data were pre-treated using spectra correction methods including multiplicative scatter correction (MSC), orthogonal signal correction (OSC) dan standard normal variate (SNV). The result showed that the best spectra correction method for predicting L*and b* in cayenne pepper was PLSR+ OSC while a*was PLSR+ SNV. The accuracy value of * with OSC is R calibration = 0.99 and b*with OSC is R calibration = 0.76. This research resumed that Vis/NIR spectroscopy and PLSR have high accuracy and can be used to predict the skin color of cayenne pepper fruit.
Analisis kebutuhan ruang dan penataan parkir kendaraan mobil Adi Mawardin; Dinda Fardila; Sari Yusira
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.48070

Abstract

Empire XXI merupakan salah satu tempat hiburan yang ada di kota Yogyakarta. Jumlah kendaraan mobil yang datang ke Empire XXI untuk hari-hari tertentu sangat ramai hal ini justru tidak seimbang dengan kapasitas ruang parkir yang ada hingga sering terjadi penumpukkan kendaraan mobil di pintu masuk yang menunggu. Parkir adalah keadaan tidak bergerak suatu kendaraan yang bersifat sementara karena ditinggal oleh pengemudinya. Tujuan dari penelitian ini adalah untuk karakteristik parkir kendaraan mobil pada lokasi studi yaitu Empire XXI Yogyakarta berupa: akumulasi parkir, volume, konfigurasi parkir, turnover, indeks parkir, headway dan durasi parkir dan memberikan alternatif ruang parkir di area Empire XXI Yogyakarta. Analisis menunjukkan bahwa luas 915,4 m2 mampu menampung 56 mobil sedangkan data primer yang ada 1.397,25 m2 dengan daya tampung kapasitas 90 kendaraan mobil. Saran kepada pihak Empire XXI Yogyakarta agar dilakukan perluasan lahan menggunakan tanah di samping Empire sebanyak 777 m2 sehingga mampu menambah kapasitas sebanyak 50 dengan menggunakan sudut 90o dan membuat pos jaga barusehingga dapat memisahkan pos masuk motor dan mobil.Analysis of space requirements and car parking arrangementsEmpire XXI is one of the entertainment venues in Yogyakarta city. The number of car vehicles that come to Empire XXI for certain days is very crowded this is actually not balanced with the capacity of existing parking spaces until there is often a accumulation of car vehicles at the entrance that waits. Parking is a state of motionless a vehicle that is temporary because it is left by the driver. The purpose of this study is for the characteristics of car parking at the study site, namely Empire XXI Yogyakarta in the form of: parking accumulation, volume, parking configuration, turnover, parking index, headway and parking duration and provide an alternative parking space in the Empire XXI Yogyakarta area. The analysis showed that an area of 915.4 m2 was able to accommodate 56 cars while the existing primary data was 1,397.25 m2 with a capacity capacity of 90 car vehicles. Advice to Empire XXI Yogyakarta to expand land using land beside Empire as much as 777 m2 so that it can increase capacity as much as 50 by using a 90o angle and create a new guard post, so that it can separate motor and car entry posts.
Peningkatan kualitas air Waduk Diponegoro Semarang dengan filter arang aktif Nia Fadlilatul Laily; Nurhayati Nurhayati; Endang Kusdiyantini; Arina Tri Lunggani
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.48195

Abstract

Air bersih harus memiliki kualitas yang baik dari segi fisika, kimia, maupun biologisnya. Waduk Diponegoro mempunyai peran strategis dalam pengelolaan sumber daya air Kota Semarang. Berdasarkan hasil survei pada Waduk Diponegoro. Tujuan penelitian untuk meningkatkan kualitas air Waduk Diponegoro berdasarkan kategori kelas indeks kualitas air parameter biologi, fisika, dan kimia dengan perlakuan filter arang aktif. Arang aktif banyak digunakan untuk menghilangkan kontaminan dalam air karena kapasitasnya yang tinggi untuk adsorpsi senyawa tersebut, yang timbul dari luas permukaan dan porositasnya yang besar serta dapat digunakan untuk mengurangi keberadaan E. coli pada air. Proses uji bakteriologis air dilakukan dengan menggunakan metode deteksi bakteri dengan 3M Petrifilm E.coli/Coliform. Metode yang digunakan pada penelitian meliputi sterilisasi alat, pengambilan sampel air pada titik inlet dan outlet, filtrasi air dengan ketebalan arang aktif 10, 15, dan 20 cm, inokulasi sampel air, perhitungan jumlah koloni, pengukuran dan penentuan kualitas air. Hasil penelitian menunjukkan bahwa semakin tebal media arang aktif yang digunakan semakin baik kualitas air yang dihasilkan. Perlakuan filtrasi arang aktif dapat meningkatkan kualitas air Waduk Diponegoro Semarang dari kelas D kategori tercemar berat menjadi kelas C kategori tercemar sedang berdasarkan parameter biologi, fisika, dan kimia.Improve the water quality of Diponegoro Reservoir with active charcoal filterClean water must have good quality in terms of physics, chemistry, and biology. Diponegoro Reservoir has a strategic role in the management of Semarang City’s water resources. Based on the results of the survey on Diponegoro Reservoir. The purpose of the study is to improve the water quality of Diponegoro Reservoir based on the class category of water quality index of biological, physical, and chemical parameters with active charcoal filter treatment. Activated charcoal is widely used to remove contaminants in water due to its high capacity for adsorption of the compound, which arises from its large surface area and porosity and can be used to reduce the presence of E. coli in water. The water bacteriological test process is carried out using a method of detection of bacteria with 3M Petrifilm E.coli/Coliform. Methods used in the study include sterilization of tools, sampling of water at inlet and outlet points, filtration of water with the active charcoal thickness of 10, 15, and 20 cm, inoculation of water samples, calculation of the number of colonies, measurement and determination of water quality. The results showed that the thicker the active charcoal media used the better the quality of the water produced. Active charcoal filtration treatment can improve the water quality of Diponegoro Reservoir Semarang from class D category heavily polluted to class C moderately polluted category based on biological, physical, and chemical parameters.
Uji dan identifikasi aktivitas antioksidan isolat BAL CIN-2 hasil isolasi cincalok Ihdina Isfara Suteja; Wijanarka Wijanarka; Endang Kusdiyantini
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.44187

Abstract

Penelitian ini bertujuan untuk menguji antioksidan yang dihasilkan oleh isolat BAL CIN-2 dengan metode (α,α-diphenyl-β-picrylhydrazyl) (DPPH) dan fosfomolibdenum, melakukan identifikasi senyawa antioksidan yang dihasilkan isolat BAL CIN-2 menggunakan metode TLC (Thin Layer Chromatography) dan spektrofotometer UV-Vis, serta menganalisis gugus fungsional antioksidan isolat BAL CIN-2 menggunakan metode Fourier Transform Infrared Spectroscopy (FTIR). Kultur ditumbuhkan pada media MRSA dan diamati pertumbuhannya pada media MRSB selama 72 jam, selanjutnya dianalisis dengan metode yang telah ditentukan. Hasil uji TLC untuk isolat BAL CIN-2 menghasilkan empat noda dengan nilai Rf 0,98; 0,91; 0,73; dan 0,6. Uji DPPH menunjukkan sifat antioksidan supernatan isolat BAL CIN-2 sangat lemah. Metode fosfomolibdenum menunjukkan kadar antioksidan dari supernatan isolat BAL CIN-2 sebesar 1,906 mgAAE/ml. Pengujian menggunakan spektrofotometer UV-Vis menghasilkan 4 serapan gelombang dengan absorbansi maksimum 3,943 pada panjang gelombang 290 nm. Diduga senyawa yang terkandung di dalamnya adalah senyawa flavonoid golongan flavanon atau dihidroflavonol. Supernatan isolat BAL CIN-2 diduga mengandung senyawa flavonoid dengan gugus fungsi antioksidan O-H dan C=C aromatik dari analisis menggunakan FTIR. Berdasarkan hasil tersebut dapat disimpulkan bahwa di dalam supernatan isolat BAL CIN-2 mengandung senyawa antioksidan golongan flavonoid.Test and identification of antioxidant activity of isolates LAB CIN-2 isolated from cincalokThis study aimed to test the antioxidants produced by LAB CIN-2 isolates using α,α-diphenyl-β-picrylhydrazyl (DPPH) and phosphomolybdenum methods, to identify antioxidant compounds produced by LAB CIN-2 isolates using the Thin Layer Chromatography (TLC) and UV-Vis spectrophotometer, as well as to analyse the antioxidant functional groups of LAB CIN-2 isolate using the Fourier Transform Infrared Spectroscopy (FTIR) method. The culture was grown on MRSA media and then the growth was observed on MRSB media for 72 hours, then analyzed using the specified method. TLC test results showed that LAB isolate CIN-2 produced four spots with an Rf value of 0.98; 0.91; 0.73; and 0.6. The DPPH test showed that the antioxidant properties of the supernatant isolates of LAB CIN-2 were very weak. The phosphomolybdenum method showed that the antioxidant content of the supernatant of LAB CIN-2 isolate was 1.906 mgAAE/ml. Analysis using a UV-Vis spectrophotometer produces 4 absorption waves with a maximum absorbance 3,943 at a wavelength of 290 nm. The test is suspected that the compounds contained in it are flavonoid compounds of the flavanone or dihydroflavonol group. Analysis using FTIR showed that antioxidant from supernatant of LAB isolate CIN-2 was suspected to contain flavonoid compounds with aromatic O-H and C=C functional groups. It can be concluded that supernatant from LAB CIN-2 isolates contains weak antioxidants in the form of compounds from the flavonoids group.
Energy profile and improvement proposal of a sawdust charcoal briquette factory Akmal Irfan Majid; Syafik Maulana; Willie Prasidha
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.48513

Abstract

This study aimed to analyze the profile of energy consumption and identify efforts to improve energy efficiency. In the present work, the evaluation was focused on the main production lines, including energy utilities sourced from electricity as well as an analysis of thermal energy-based equipment. A medium-scale charcoal plant in Yogyakarta was selected as the object of the present study to represent the characteristics of a sawdust charcoal briquette industry. Measurements of electrical current were made using a clamp meter to determine the utility of the electrical devices while an infrared thermal camera was used to determine the temperature distribution. Results of this study indicate that thermal energy has the largest proportion in the main production line. Some points of heat concentration were found which could potentially cause hazards and thermal discomfort. Ideas for improvement were also proposed qualitatively as a recommendation
Simulasi optimalisasi kapasitas pembangkit listrik tenaga surya pada atap gedung Samsurizal Samsurizal; Andi Makkulau; Rio Afrianda
Jurnal Penelitian Saintek Vol 27, No 1 (2022)
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.44461

Abstract

DKI Jakarta merupakan salah satu daerah perkotaan yang padat penduduk dan memiliki bangunan yang padat sehingga pemanfaatan atap bangunan dapat digunakan sebagai sumber energi. Salah satu gedung yang dapat menerapkan pemanfaatan energi terbarukan yaitu gedung administrasi di PT. PJB Unit Pembangkit Muara Karang. Pada gedung tersebut telah dibangun, namun pemasangannya belum optimal dikarenakan luasan pemasangan modul surya kecil sehingga kapasitas yang dihasilkan kecil pula, sementara potensi lokasi yang ada sangat luas. Oleh karena itu, perlu dikaji sejauh mana optimalisasi kapasitas pembangkit listrik tenaga surya pada atap gedung. Dari penelitian yang sudah dilakukan didapat hasil perlu dipasang modul surya sejumlah 143 modul panel surya, dengan kapasitas yang dihasilkan saat terpasang sebesar 42.900 wp dan didapatkan pula potensi energi yang dihasilkan sebesar 93.951 kWh/tahun atau sama dengan mampu menyuplai kebutuhan energi pada di gedung tersebut sebesar 75,11% dan rata-rata produksi harian sebesar 36,27 kWh. Agar potensi energi yang dihasilkan maksimal, perlu optimalisasi potensi dan besarnya luas atap pada gedung. Energi yang dihasilkan dapat semaksimal mungkin di manfaatkan sebagai energi listrik yang pada akhirnya dapat mengurangi beban biaya pemakaian energi listrik.Optimization of solar power plant capacity on the roof of the buildingDKI Jakarta is one of the densely populated urban areas and has dense buildings so that the use of building roofs can be used as a source of energy. One of the buildings that can implement the utilization of renewable energy is the administration building in PT. PJB Muara Karang Power Plant Unit. In the building has been built, but the installation is not optimal because the installation area of small solar modules so that the resulting capacity is small, while the potential of the existing location is very wide. Therefore, it is necessary to examine the extent of optimization of solar power plant capacity on the roof of the building. From the research that has been done obtained the results of the need to install solar modules a number of 143 solar panel modules, with the capacity produced when installed by 42,900 wp and also obtained the potential of energy produced by 93,951 kWh / year, or the same as being able to supply energy needs in the building by 75.11 % and average daily production of 36.27 kWh. In order for the maximum energy potential to be optimized the potential and the size of the roof area in the building. The energy produced can be utilized as electricity that can ultimately reduce the cost of electricity consumption.

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