Open Journal Systems of University of Muhammadiyah Gresik
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Formulasi dan Uji Stabilitas Fisik Sediaan Gel Antiseptik Ekstrak Daun Sirih (Piper betle Linn.) dan Jeruk Nipis (Citrus aurantifolia Swingle) Menggunakan Gelling Agent Hydroxypropyl Methylcellulose (HPMC)
Full text linkIn the era of the Covid-19 pandemic, hands are one of the main media for the spread of viruses or bacteria, so antiseptic preparations are needed as one of the preventive measures or prevention efforts. Many plants from natural ingredients that can be used to make antiseptics include betel leaf extract and lime juice. The selection of betel leaf and lime as ingredients for the manufacture of this hand sanitizer gel is due to the presence of flavonoids which have antioxidant and antibacterial functions. This study aims to determine the physical stability of hand antiseptic gel from betel leaf extract (Piper betle L.) and lime juice (Citrus aurantifolia Swingle) using HPMC base and to determine HPMC base at what concentration can produce antiseptic gel preparations. Betel leaf extract (Piper betle L.) and lime juice (Citrus aurantifolia Swingle) with good physical characteristics. This research is experimental using a qualitative descriptive method. The results of this study indicate that from the three formulas that have been made, the preparation is stable for 7 days and there is no change in smell, color, and shape. Based on the test results, it can be seen that the best formula is the HPMC concentration of 0.6 grams in terms of organoleptic, homogeneous, pH, adhesion and hedonism tests which also show the best with the highest total average value, which is equal to 3.3
Analisis Pemilihan Supplier Marmer Dan Granit Menggunakan Metode Analytical Hierarchy Process Pada CV. Unicorn Kencana Indopetra
Full text linkBackground – CV. Unicorn Kencana Indopetra is a company engaged in the distribution of marble sales. In carrying out its business processes when receiving goods from suppliers, based on pre-research conducted by the author of CV. Unicorn Kencana Indopetra in selecting suppliers using historical data and adjusting according to consumer demand. The selection of suppliers does not use a special method so that sometimes obstacles or problems arise such as goods received are defective, cracked, or broken. This results in quite a lot of losses because the goods purchased do not match the estimated price to be sold due to defects during shipping or not being packed safely from impact.
Objective – This study aims to describe the selection of marble and granite suppliers that have been carried out by the company and compare it with the method of selecting marble and granite suppliers using the Analytical Hierarchy Process method.
Design / Methodology / Approach – This study uses a qualitative method with a descriptive approach. Data collection techniques used are structured interviews, documentation, focused group discussions.
Findings – The results of this study state that the overall AHP Software Expert Choice results, PT. XYZ (Supplier Italia 1) is considered the best supplier with a weight value of 0.327, followed by PT. CDE (Supplier China 1) with a weight value of 0.258, PT. ABC (Supplier Italy 2) with a weight value of 0.187, PT. FGH (Supplier China 2) with a weight value of 0.136, and PT. IJK (Supplier China 3) with a weight value of 0.091. These results indicate that overall, the best suppliers that will be chosen by the company to be used as long-term partners are PT. XYZ (Supplier Italy 1) and PT CDE (Supplier China 1) because overall these suppliers have the highest value compared to the other three suppliers.
Research Implication – The findings of this study can be used as a reference if the subsequent research faces conditions similar to the findings in this study.
Limitations – This study has limitations in the selection of marble and granite suppliers
The Influence of Service Quality, Product Quality and Price Perception on Purchasing Decisions Through Customer Satisfaction At The Local Part of PT Sumber Mas Indah Plywood
Full text linkThe purpose of this research is to determine the influence of product quality and price perception on purchasing decisions through customer satisfaction at PT. Local Source of Mas Indah Plywood. This research is quantitative descriptive research. The research was conducted at PT. Sumber Mas Indah Plywood Plywood Solution division. The sample in this study amounted to 190 respondents. Sampling used purposive sampling technique and the analytical tool used was Path Analysis, which was previously carried out by classical assumption tests. The data collection technique was carried out using the questionnaire method. Data analysis using SPSS 25. The results of hypothesis testing using the t test partially show that service quality, product quality and price perception influence customer satisfaction and purchasing decisions. In the analysis of the coefficient of determination, an Adjusted R Square value of 0.920 was obtained, indicating that 92% of customer satisfaction can be explained by the two independent variables in the regression equation, while the remaining 8% is explained by variables outside the research model. and the Adjusted R Square value is 0.979, which shows that 97,9% of purchasing decisions can be explained by the two independent variables in the regression equation. Meanwhile, the remaining 2,1% is explained by variables outside the research model.
 
Kajian Perancangan, Pelaksanaan, dan Refleksi Pembelajaran Sesuai Kurikulum Merdeka: Calon Guru Profesional di Sekolah Menengah Kejuruan
Full text linkThe implementation of the Independent Curriculum in Indonesia has attracted significant interest and research in the field of education. The Independent Curriculum which aims to provide independent and flexible learning has been the subject of various studies that focus on its implementation, impact, and relevance in the education system. In the implementation of Lesson Study also uses other approaches, one approach that can be done by implementing the capacity and needs of student interests is using the TaRL (Teaching at The Right Level) approach. This study has a problem formulation about the study of the ability of prospective professional teachers in implementing lesson study with the Teaching at The Right Level (TaRL) approach at the vocational high school level. The purpose of this study is to explore the ability of prospective professional teachers in designing, implementing and reflecting on the learning carried out. This study uses a descriptive method because the researcher is analyzing the problems that are occurring in learning, while the approach uses a qualitative approach. A qualitative research approach is an approach that does not use a statistical work basis, but is based on qualitative evidence. In this study, the researcher found that the ability of prospective vocational high school teachers in designing learning was in the good category, as well as the ability of prospective teachers in implementing learning was in the good category. This is supported by the finding that the ability of prospective teachers is not yet optimal when designing LKPD, learning media, and teaching materials that are integrated/synchronous in learning. In addition, the ability to design LKPD that brings up numeracy literacy as part of the motivation to carry out student-centered mathematics learning has not been see
Pemberdayaan Usaha Mikro Konveksi Hijab di Dusun Nglongko Kabupaten Jombang
Full text linkOur community service partner is a hijab convection micro business located in Nglongko Hamlet, Kebontemu Village, Peterongan District, Jombang Regency. There are three main problems faced by partners, namely obstacles to business capital, obstacles in implementing budget transparency, and monotonous marketing strategies. The purpose of this service program is to provide assistance in the procurement of raw materials, hold counseling and simulation of excel-based integrated financial reports and the implementation of marketing via social media and marketplaces. The method used in our service is to conduct simulations and practice. It is hoped that with this training, service partners will be able to run their next business ventures well
Karakteristik Organoleptik Cookies Umbi Ungu Menggunakan Metode Uji Ranking
No full textCookies juga merupakan salah satu produk bakery yang disukai masyarakat Indonesia sebagai makanan ringan. Formulasi yang digunakan adalah 30%, 50%, dan 70% tepung umbi ungu, dengan bahan tambahan tepung terigu, margarin, gula halus, dan kuning telur. Uji organoleptik melibatkan 30 panelis yang menilai aroma, rasa, dan tekstur. Hasil menunjukkan bahwa formulasi dengan 30% tepung umbi ungu lebih disukai secara keseluruhan dibanding formulasi lainnya. Parameter aroma dan rasa tidak menunjukkan perbedaan signifikan berdasarkan analisis ANOVA, namun parameter tekstur menunjukkan perbedaan nyata, di mana formulasi 30% menghasilkan tekstur paling renyah. Cookies dengan tepung umbi ungu berpotensi menjadi alternatif makanan ringan yang rendah gluten dengan kandungan serat tinggi
ARTIKEL REVIEW: PENGARUH VARIASI SUHU DAN LAMA PENYANGRAIAN TERHADAP SIFAT FISIK, KIMIA, DAN ORGANOLEPTIK PADA BIJI KOPI ARABIKA
Full text linkSuhu dan waktu merupakan faktor penting dalam proses penyangraian kopi yang memengaruhi karakteristik fisik dan kimia dari kopi Arabika. Hasil penelitian mengindikasikan bahwa semakin rendah kadar air dalam biji kopi, semakin panjang masa simpannya. Selain itu, proses penyangraian juga menurunkan kandungan kafein dalam kopi. Suhu yang lebih tinggi serta durasi penyangraian yang lebih lama mampu memecah lebih banyak senyawa aktif, yang pada akhirnya memengaruhi aroma, rasa, dan warna kopi. Kombinasi suhu dan waktu penyangraian yang bervariasi menghasilkan karakteristik organoleptik yang berbeda pada kopi Arabika
Pengaruh konsentrasi katalis natrium hidroksida pada pembuatan biodiesel dengan memanfaatkan ampas tebu sebagai adsorben
Full text linkKemajuan teknologi mengakibatkan peningkatan konsumsi energi. Sedangkan energi yang banyak digunakan berasal dari sumber energi fosil. Biodiesel merupakan salah satu bahan bakar diesel alternatif yang berasal dari sumber daya alam yang dapat diperbarui. Minyak goreng bekas merupakan salah satu bahan dasar potensial yang dapat dikonversi menjadi biodiesel. Fokus penelitian ini adalah untuk menentukan bagaimana variabel konsentrasi katalis mempengaruhi proses produksi biodiesel dari minyak kelapa RBD bekas dengan reaksi transesterifikasi. Sebelum dilakukan transesterifikasi, terlebih dahulu minyak kelapa RBD bekas dilakukan proses adsorpsi dengan karbon aktif dari ampas tebu. Setelah dilakukan adsorpsi nilai asam lemak bebas pada minyak kelapa RBD bekas turun dari 1,801657485 % menjadi 0,071874207 %. Setelah itu dilakukan proses transesterifikasi pada suhu 60 oC dengan kecepatan pengadukan 300 rpm selama 60 menit menggunakan pelarut etanol dan variasi katalis NaOH 0,5 ; 1 ; 1,5 ; 2 dan 2,5 %. Hasil yield biodiesel yang didapatkan pada konsentrasi katalis 0,5 % sebesar 87,86 %, konsentrasi katalis 1 % sebesar 89,67 %, konsentrasi katalis 1,5 % sebesar 87,11 %, konsentrasi katalis 2 % sebesar 86,09 %, dan konsentrasi katalis 2,5 % sebesar 83,75 %. Kondisi optimum transesterifikasi didapatkan pada variasi konsentrasi katalis 1 % dengan yield 89,67 % nilai massa jenis 854,24 kg/m3, viskositas 2,215600482 cSt, dan angka asam 0,41627988 mg-KOH/gr
Analisis Pengaruh Penggunaan Serbuk Limbah Kulit Kerang Sebagai Material Pengganti Pasir Pada Campuran Paving Block
Full text linkPaving block dapat digunakan untuk berbagai jenis kebutuhan, mulai dari yang sederhana hingga yang disesuaikan dengan spesifikasi khusus. Pada tahun 2024, di Indonesia terjadi peningkatan tajam penggunaan Paving block. Pasir telah menjadi bahan utama dalam pembuatan Paving block karena meningkatnya permintaan. Pasir adalah sumber daya alam (SDA) yang tidak dapat diperbarui dan dapat merusak ekosistem jika digunakan terlalu banyak. Cangkang kerang dapat digunakan sebagai pengganti pasir saat membuat Paving block karena mengandung zat kapur dan senyawa kimia yang sama dengan pasir. Fokus penelitian ini adalah untuk mengetahui nilai kuat tekan, penyerapan air, dan keausan Paving block yang menggunakan serbuk cangkang kerang. Dengan ukuran cetakan 20 cm × 10 cm × 6 cm, proses pembuatan dilakukan secara manual. Rasio semen serta pasir yang digunakan adalah 1 : 3, dan variasi serbuk kerang 0%, 10%, 20%, 30%, dan 40%. Hasilnya menunjukkan bahwa kuat tekan tertinggi dihasilkan oleh variasi 10% sebesar 35,92 MPa (mutu B), sedangkan 0% hanya 23,25 MPa. Variasi 20%, 30%, dan 40% menghasilkan kuat tekan masing-masing sebesar 27,42 MPa (mutu B), 29,17 MPa (mutu B), dan 24,00 MPa (mutu B). Daya serap air tertinggi adalah 9% pada 30% dan 40% (mutu D), dan keausan tertinggi adalah 0% dengan nilai 0,172 mm/menit (mutu C). Variasi 10% memberikan performa terbaik secara keseluruhan. Dengan substitusi hingga 40% tetap memenuhi persyaratan SNI 03-0691-1996, menjadikan serbuk cangkang kerang solusi inovatif dan ramah lingkungan untuk material konstruksi
Modifikasi Struktur Samaview Apartment Batu dengan Menggunakan Metode Beton Pracetak
Full text linkApartemen Samaview adalah salah satu apartemen yang terletak di Kota Malang, dengan total 12 lantai. Apartemen Samaview dibangun dengan strukturI utama menggunakan beton bertulang dengan metode cor in-situ. Dalam tugasIakhir ini dilakukan perencanaan untuk modifikasiIstruktur dari Apartemen Samaview dengan menggunakan betonJpracetak dan memiliki kategori desain seismik C. Perencanaan dengan metode beton pracetak ini akan di terapkan pada pada balok dan pelat lantai. Sedangkan untuk perencanaan yang lain tetap menggunakan metode cor in-situ. PerencanaanIelemen beton pracetak pada tugasJakhir ini mengacu pada beberapaIpedoman, seperti SNI 2847:2019, SNIJ1726:2019, SNIJ1727:2019, PCIJHandbook, dan beberapa sumber referensi lainnya. Proses perhitungan dan analisa struktur yang meliputi analisaJpembebanan dan permodelan struktur akan menggunakanJsoftware SAP2000. Dari Analisa dan perhitungan digunakan tebal pelat lantai sebesar 14 cm, dimensi balok anak sebesar 35/50 cm, dimensi balokIinduk sebesarI40/60 cm, dan dimensiIkolom sebesar 75/75 cm. untuk sambunganJantar elemen pracetak menggunakan sambungan basah dan konsol pendek. Dari hasil perencanaan diatas akan diterapkan dalam bentuk gambarIteknik