Waste cooking oil is oil that used in household needs that have been used repeatedly and some are not suitable for consumption anymore. Waste cooking oil contains carcinogenic substances that harm the body because it can cause cancer, narrowing of blood vessels that trigger coronary heart disease, stroke, hypertension. The innovation of processing used cooking oil is another product, one of which is soap making. The method that can be used is the Carbon Activated Agent (CAA) saponification process, where activated carbon is used as the neutralizing agent. CAA material combined with ocimum bacillium leaf extract in the process of making this soap can be an antiseptic substance. Ocimum bacillium leaves as a bacterial deactivated agent (BDA) have 4 dominant compounds, namely linalool, geraniol, sitral, and eugenol which function as antiseptics. The variables used in this study included variations in the addition of basil leaf extract as BDA (10%, 14%, 18%) and variations in the ratio of the amount of added KOH (20 mL, 30 mL, and 40 mL). The results showed that the addition of 18% basil extract and with the addition of KOH by 30 mL gave the greatest inhibition of bacterial growth of 1.9 cm.
Limbah nata de coco merupakan nata yang tidak dapat dijadikan sebagai produk setelah proses sortasi sehingga menghasilkan limbah padat dan jarang dimanfaatkan. Kandungan selulosa pada limbah padat nata de coco sebesar 42,57%. Tujuan penelitian ini membuat plastik biodegradable dengan hasil limbah nata de coco dengan penambahan plasticizer. Metode yang digunakan pada pembuatan plastik biodegradable ini adalah metode inversi fasa dengan variasi berat selulosa 2%; 2,5%; dan 3% (b/v), variasi volume gliserol sebesar 2%, 3%, dan 5% (v/v), dan penambahan kitosan sebagai penguat. Karakteristik pastik biodegradable diuji menggunakan UTM (Universal Testing Machine) dan FTIR (Fourier-Transform Infrared Spectroscopy). Plastik biodegradable yang dihasilkan dari berbagai perbandingan berat selulosa dan volume gliserol memiliki karakteristik yang berbeda-beda. Plastik biodegradable dengan karakteristik optimal memiliki nilai kuat tarik optimal sebesar 4,34 MPa, nilai elongasi optimal sebesar 4,44% dan nilai ketahanan air optimal sebesar 65,20%. Pada analisis gugus fungsi menggunakan FTIR menunjukkan tidak ditemukan adanya gugus fungsi baru dalam plastik biodegradable selain gugus fungsi bahan pembentuknya. Pada uji biodegradabilitas, diperoleh nilai biodegradabilitas sebesar 80% – 100% setelah ditimbun di dalam tanah selama 14 hari.Nata de coco waste is nata that cannot be used as a product after the sorting process so that it produces solid waste and is rarely utilized. The cellulose content in nata de coco solid waste is 42.57%, the purpose of this study is to make biodegradable plastic with the results of nata de coco waste by adding plasticizers. The method used in the manufacture of biodegradable plastics is the phase inversion method with cellulose weight variation; 2%; 2.5%; and 3% (w / v), variations in the volume of glycerol by 2%, 3%, and 5% (v/v), and the addition of chitosan as an amplifier. The biodegradable plastic characteristics were tested using UTM (Universal Testing Machine) and FTIR (Fourier-Transform Infrared Spectroscopy). Biodegradable plastics that are produced from various weight cellulose and glycerol volume ratios have different characteristics. Biodegradable plastic with optimal characteristics has an optimal tensile strength value of 4.34 MPa, optimal elongation value of 4.44% and an optimal water resistance value of 65.20%. In the analysis of functional groups (FTIR) no new functional groups were found in biodegradable plastics in addition to the functional groups forming materials. In the biodegradability test, a biodegradability value of 80% - 100% is obtained after being buried in the ground for 14 days.
The purpose of this study is to describe the role of project-based learning in design a learning trajectory of learning device development to improve mathematical knowledge for teaching of prospective mathematics teachers. The method use is design research with three stages, namely, preliminary design; teaching experiment; retrospective analysis. The subjects of research are prospective mathematics teacher class of 2019 from one university in Kuningan, Indonesia. The use of project-based learning in designing learning trajectory of learning device development plays an essential role as an elicited to improve mathematical knowledge for teaching. This study also describes the design principles and characteristics of the learning trajectory namely didactic trajectory designed by the role of project-based learning syntax.
Ekonomi kreatif merupakan sebuah konsep ekonomi di era ekonomi baru yang mengintensifkan informasi dan kreativitas dengan mengandalkan ide dan stock of knowledge. Masyarakat yang heterogen, majemuk dan factor Sumber Daya Manusia (SDM) menjadi faktor utama dalam kegiatan ekonomi. Masyarakat yang kondisi geografis ekonominya berada di lingkungan pusat perekonomian seperti pasar tradisional, dituntut untuk lebih kreatif, inovatif, dan sensitif tentang kondisi pangsa pasar. Kelompok Pembinaan Kesejahteraan Keluarga (PKK) Kelurahan Krajan Kabupaten Klaten berada pada kondisi sosial geografis ekonomi yang strategis dengan lingkungan pasar tradisional. Sebagian kelompok PKK ini memiliki pendapatan yang masih rendah karena tidak memiliki modal atau ketrampilan yang terbatas untuk menambah penghasilan. Mata pencahariannya antara lain adalah sebagai pedagang, pembantu rumah tangga, pengasuh anak, dan menjual minuman atau makanan. Kegiatan jual beli ini hanya berlangsung di pagi hari saja tatkala kegiatan pasar masih aktif. Pada siang atau sore sampai malam mereka tidak memilki aktifitas tambahan. Program pendampingan dan pelatihan pembuatan detergent cair dan bubuk dilakukan untuk meningkatkan taraf perekonomian dan membantu menciptakan ketentraman dalam berkehidupan. Kegiatan ini dilakukan tanpa menghilangkan pekerjaan utamanya, dan bisa dilakukan setiap saat atau ketika longgar. Metode pelaksanaan program ini adalah introduksi, pelatihan, pendampingan, dan pemantauan. Tujuan program ini adalah adanya peningkatan pendapatan kelompok PKK.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.