The study entitled Development of a Project-Based Learning Student Worksheet (LKPD) Oriented toward Sustainable Development Goals (SDGs) on Green Chemistry Material was conducted with students of class X-1 at SMA Negeri 1 Indralaya Utara. The development procedure followed the Rowntree model combined with Tessmer’s formative evaluation. The objective of this research was to produce a reaction…
Penggunaan kerang hijau yang sangat banyak mengakibatkan limbah cangkang kerang hijau meningkat pesat. Cangkang kerang hijau digunakan sebagai bahan utama sintesis CaO dan modifikasi CaO/SDS. Modifikasi CaO dilakukan perbandingan berat CaO terhadap SDS yaitu (2:1) dan (1:1). Sintesis CaO menggunakan metode ekstraksi dan presipitasi. Adanya penambahan SDS berfungsi sebagai pencegah aglomerasi. H…
Grafena merupakan salah satu bentuk alotrop karbon yang memiliki sifat termal, listrik, katalitik, dan optik yang tinggi sehingga dapat digunakan dalam berbagai bidang. Grafena memiliki turunan berupa oksida grafena (GO) dan oksida grafena tereduksi (rGO). Oksida grafena disintensis menggunakan metode Hummer, serta oksida grafena tereduksi disintensis menggunakan metode reduksi multifase. Pada …
Critical thinking ability is a necessary ability in the super smart society 5.0 era which plays an important role in improving the quality of human resources. Critical thinking is included in the design of 21st century learning skills that are relevant to the demands of the Independent Learning Curriculum. Students' critical thinking skills can be trained by providing HOTS (Higher Order Thinkin…
Telah dilakukan penelitian spesiasi ion logam krom (III) dan krom (VI) menggunakan metode potensiometri sel konsentrasi. Tujuan penelitian untuk memvalidasi metode dan menentukan distribusi spesies ion logam krom (III) dan krom (VI) dalam sedimen. Metode potensiometri sel konsentrasi memiliki rangkaian alat berupa anoda dan katoda yang terhubung dengan jembatan garam KCl dan elektroda logam Cr.…
Konversi minyak nabati dapat dilakukan dengan metode elektrolisis sebagai metode alternatif. Tujuan konversi minyak bekas dengan metode elektrolisis untuk memproduksi biodiesel dengan memperhatikan kuat arus dan waktu reaksi. Sampel minyak bekas yang digunakan memiliki nilai asam lemak bebas (ALB) sebesar 0,379%. Reaksi esterifikasi dilakukan sebagai pretreatment sebelum melakukan reaksi transe…
This research to produce a product in the form of valid and reliable chemistry questions on reaction rate material and to know the level of difficulty, and discriminative power of these questions. This research uses the 4D development model which consists of 4 stages, namely define, design, develop and disseminate. Product feasibility testing was carried out in two stages, namely expert apprais…
Water hyacinth is a bioindicator plant that has high tolerance to metal pollutans concentration of Cr(III) and Cr(VI) metal ions species in Ogan river. Measurement of Cr(III) and Cr(VI) metal ions species has done using the concentration cell potentiometric method. This study aims to validated the method (linearity, precision, accuracy, LoD & LoQ). Applying the concentration cell potentiometric…
This study aims to develop a PBL-based Student Worksheet (LKPD) oriented to SDGs on chemical bonding material for grade XI of SMA Negeri 1 Indralaya Utara. This study uses a development research method with the Rowntree development model which includes planning, development, and evaluation stages, as well as Tessmer formative evaluation which includes expert review, one-to-one, and small group.…
This study aims to develop a Student Worksheet (LKPD) based on Problem Based Learning (PBL) integrated with the Sustainable Development Goals (SDGs) on the colloid topic for Grade XII senior high school students. The study was motivated by the limited availability of contextual and innovative learning materials that are able to connect colloid concepts with real-life issues and sustainability. …
This study developed a Student Worksheet (LKPD) based on problem-based learning integrated with sustainable development goals (SDGs) on corrosion material. This development was carried out by adapting the Rowntree model in collaboration with the formative evaluation stages according to Tessmer. The main objective of this study was to produce a valid, practical, and effective PBL-based LKPD inte…
Protease is an enzyme capable of breaking peptide bonds in proteins into peptides and amino acids. Thermophilic bacteria from B. licheniformis are known as one of the microorganisms that produce protease capable of degrading keratin with high activity and under extreme conditions. In this study, protease enzyme production and purification were carried out from Bacillus licheniformis TS-8 isolat…
Penelitian ini dilatarbelakangi oleh keterbatasan bahan ajar yang hanya berbentuk media cetak, sehingga pembelajaran menjadi monoton dan kurang menarik bagi peserta didik. Tujuan dari Penelitian ini adalah menghasilkan e-LKPD yang valid, praktis, dan efektif pada materi struktur atom berbasis Science, Technology, Engineering and Mathematic (STEM) di SMA Srijaya Negara. Penelitian ini merupakan …
Daun sirsak (Annona muricata L.) mengandung senyawa aktif flavonoid yang memiliki aktivitas sebagai antioksidan. Virgin coconut oil (VCO) memiliki kandungan komposisi asam lemak tertinggi pada asam laurat yang berfungsi melindungi kulit dari penuaan dini. Penelitian ini bertujuan untuk mengetahui formulasi ekstrak daun sirsak dan virgin coconut oil dalam kualitas sediaan handbody lotion. Masera…
The development of interactive E-LKPD with Wizer.me material on chemical concepts in everyday life based on green chemistry has been carried out in class X chemistry learning at SMAN 1 Indralaya. This development process uses the APPE model (Analysis, Planning, Development, Evaluation). Data for this development was obtained through interviews, questionnaires, walkthroughs and tests. The evalua…
Penelitian ini bertujuan untuk memperoleh formulasi balsam stick aromaterapi berbahan aktif minyak atsiri jeruk manis (Citrus sinensis) dan Virgin Coconut Oil (VCO). Penelitian ini menggunakan metode eksperimen dengan variasi konsentrasi minyak atsiri jeruk manis (F1: 7,5%; F2: 10%; dan F3: 12,5%) dan variasi konsentrasi VCO (F1: 37,3%; F2: 34,8%; dan F3: 32,3%) pada formulasi balsam stick. Min…
Daun salam (Syzygium polyanthum) dan daun mengkudu (Morinda citrifolia L.) mengandung senyawa flavonoid yang terbukti memiliki aktivitas sebagai antidiabetes. Penelitian ini dilakukan dengan tujuan untuk memperoleh formulasi ekstrak etanol daun salam (Syzygium polyanthum) dan daun mengkudu (Morinda citrifolia L.) yang optimal sebagai antidiabetes. Hasil rendemen ekstrak etanol daun salam sebesa…
This research is a development research that aims to produce Integrated Science Student Worksheet Based on Problem Based Learning (PBL) Topic of Material Compiling Particlees that are valid, practical, and effective. The development model used is Rowntree (planning, development stages) modified with Tessmer formative evaluation. Tessmer formative evaluation stages consist of self-evaluation, ex…
This development research was conducted to produce Problem Based Learning (PBL) based Learner Worksheets (LKPD) and applied for learning chemical compounds in class VIII SMPN 1 Sembawa which are valid, practical, and effective. The development model used in this research is the Rowntree development model and modified with Tessmer's formative evaluation. Data were collected through interviews, q…
Banana pseudostem waste was minimally utilized and often discarded by the community. However, many studies found that banana pseudostems could be fermented to produce bioethanol due to its high cellulose content. Therefore, this study conducted bioethanol fermentation from banana pseudostems waste (Musa balbisiana) pretreated with KOH microwave by separate hydrolysis and fermentation. The effec…
Penelitian pengembangan ini telah dilakukan untuk menghasilkan produk LKPD berbasis problem based learning IPA di kelas IX SMP IT Raudhatul Ulum yang valid, praktis, dan efektif. Metode penelitian pengembangan yang dilakukan pada penelitiam ini menggunakan model Rowntree yang dimodifikasi evaluasi formatif tessmer. Penelitian ini meliputi tiga tahap, yaitu 1) tahap perencanaan, 2) tahap pengemb…
Penelitian Pengembangan ini telah dilakukan untuk menghasilkan produk LKPD LKPD IPA Terpadu berbasis project based learning di kelas IX.10 SMP Negeri 18 Palembang yang valid, praktis dan efektif.Metode penelitian Pengembangan yang dilakukan pada penelitian ini menggunakan model ADDIE yang dimodifikasi evaluasi formatif pengembangan tessmer. Penelitian ini meliputi 4 tahapan yaitu 1) tahap anali…
Pabrik pembuatan natrium bikarbonat kapasitas produksi 60.000 ton/tahun direncanakan akan berdiri pada tahun 2030 di Kawasan Candi Industrial Estate, Jl. Gatot Subroto, Kecamatan Ngaliyan, Semarang, Provinsi Jawa Tengah. Natrium bikarbonat pada pabrik ini dibuat melalui proses reaksi metatesis dari bahan baku natrium sulfat dan ammonium bikarbonat menggunakan reaktor Continuous Stirred Tank Rea…
Pabrik pembuatan Metil Klorida dengan kapasitas 13.000 ton/tahun direncanakan pembangunannya pada tahun 2033 yang berlokasi di Bontang, Kalimantan Timur seluas 3,4 Ha. Operasi Pabrik berjalan selama 24 jam/hari dalam 300 hari/tahun. Komoditi Metil Klorida yang diproduksi mengacu pada Patent WO 2024/ 063425 A1 yang menggunakan klorinasii metana dan hidroklorinasi metanol. Proses reaksi berlangsu…
Degenerative diseases and infections suffered by most of the Indonesian population. Free radicals are a major contributor to degenerative diseases. While infectious diseases are caused by pathogenic microorganisms, one of them is the bacteria Staphylococcus epidermidis. The negative effects of free radicals and S. epidermis bacteria can be controlled using antioxidants and antibacterials. Synth…
Pabrik Dimetil Suksinat direncanakan berlokasi di daerah Bontang Utara, Kalimantan Selatan. Pabrik ini meliputi area seluas 3 Ha dengan kapasitas 30.000 ton per tahun. Proses pembuatan Dimetil Suksinat dilakukan melalui proses Esterification reaction of dicarbocylic acid, senyawa asam suksinat direaksikan dengan metanol membentuk intermediet monometil suksinat yang selanjutnya bereaksi dengan m…
Congo red dye is widely used in industry, one of them is textile industry. Congo red dye waste if it enters the environment without proper processing will cause environmental pollution. Fe3O4 and Fe3O4-SDS (1:1) composite were used for the adsorption of congo red dye by synthesizing using the coprecipitation method and characterized using XRD, FTIR, VSM and BET. The XRD characterization results…
The dye that is widely used in the textile industry is congo red dye which is carcinogenic and toxic to many organisms so that processing is needed. Fe3O4-SDS (2:1) and (2:3) composites were used as adsorbents in the adsorption of congo red dye by synthesis using the coprecipitation method and then characterized by XRD, BET, VSM and FTIR. The XRD characterization results of Fe3O4-SDS (2:1) and …