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Gelatin Extraction and Characterization from Femur Bones of Bovine and Porcine with Acid Process Purwantiningsih Sugita; Muhamad Rifai; Laksmi Ambarsari; Dyah Utami Cahyaning Rahayu; Hanhan Dianhar
Jurnal Jamu Indonesia Vol. 6 No. 1 (2021): Jurnal Jamu Indonesia
Publisher : Tropical Biopharmaca Research Center, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jji.v6i1.188

Gelatin has been widely used as an additive in food industry pharmaceutical, and cosmetic. The similar physical appearance between bovine and porcine gelatin causes an issue for some communities like a Muslim due to awareness of halal food. This study aims to produce gelatin from femur bones of bovines with acid hydrolysis and their characteristics compared to standard gelatin of bovine and porcine. Bovine and porcine bones were soaked in 5% HCl for 10 days and every 2 days a HCl solution was replaced to get ossein. Ossein is hydrolyzed by gradual heating at 65, 75, and 85oC. Gelatin confirmed by the physico-chemical characters, FT-IR and analysis amino acid with HPLC.The results showed that the yield of bovine gelatin was 4.33%. The physico-chemical characters of bovine gelatin resulting from isolation and bovine gelatin standards are in conformity with porcine gelatin standards and meet the requirements of SNI 06-3735-1995 and GMIA. Therefore, bovine gelatin is specifically capable of substituting porcine gelatin for application in the pharmaceutical field. The FTIR spectrum of bovine gelatin shows the presence of amide A, amide I, amide II and amide III groups. The amino acid characters of gelatin were identified as glycine (13.57%) and proline (1.62%) for bovine gelatin and glycine (0.51%) and proline (0.09%) for porcine gelatin.

IMPLEMENTASI PROGRAM KESELAMATAN DAN KESEHATAN KERJA (K3) UNTUK MENINGKATKAN KINERJA PENGGUNAAN DAN PENGELOLAAN LABORATORIUM IPA DI SMA LABSCHOOL CIBUBUR, BEKASI, JAWA BARAT Fera Kurniadewi; Hanhan Dianhar; Mutia Delina; Jafar Amiruddin; Ahmad Rifai
Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Vol 2 (2021): PROSIDING SEMINAR NASIONAL PENGABDIAN KEPADA MASYARAKAT - SNPPM2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.452 KB)

Abstract The science laboratory at SMA Labschool Cibubur is currently not running the Occupational Health and Safety (K3) program optimally. There is a misunderstanding that the potential danger in the science laboratory in high school is relatively small because it tends to use relatively few chemicals, causing a lack of understanding of the potential hazards that will occur. Therefore, the PPM KKN UNJ team consisting of lecturers and a team of students from the Chemistry, Physics, and Fire Safety Engineering Study Program carried out service activities for implementing the K3 program at the Science Laboratory of SMA Labschool through training activities related to K3 (Chemical Material Management, Chemical Waste Management, Use of APAR). Emergency Management) and inspection of K3 facilities and infrastructure. The purpose of the PPM KKN activity at the Labschool Cibubur High School Laboratory is to improve the performance of the use and management of the Science Laboratory at the Labschool Cibubur High School. The more adequate the availability of K3 facilities, the less chance of accidents occurring. After participating in K3 implementation training activities, there is an increase in K3 culture in the Labschool Cibubur SMA laboratory. In this case, the compliance and awareness of all students and teachers to follow K3 SOPs, the use of appropriate personal protective equipment, complete K3 facilities and infrastructure, and personnel who have K3 knowledge adequate Abstrak Laboratorium IPA di SMA Labschool Cibubur saat ini belum optimal menjalankan program Keselamatan dan Kesehatan Kerja (K3). Adanya pemahaman yang keliru bahwa potensi bahaya di laboratorium IPA di SMA relatif kecil karena cenderung menggunakan bahan kimia relatif sedikit menyebabkan kurang dipahaminya potensi bahaya yang akan terjadi. Oleh karena itu tim PPM KKN UNJ yang terdiri dari dosen dan tim mahasiswa dari Prodi Kimia, Fisika dan Rekayasa Keselamatan Kebakaran melakukan kegiatan pengabdian implementasi program K3 di Laboraturium IPA SMA Labschool melalui kegiatan pelatihan terkait K3 (Pengelolaan Bahan Kimia, Pengelolaan Limbah Kimia, Penggunaan APAR, Penanggulangan Keadaan Darurat) dan inspeksi sarana dan prasarana K3. Tujuan Kegiatan PPM KKN di Laboraturium SMA Labschool Cibubur adalah untuk meningkatkan kinerja penggunaan dan pengelolaan Laboratorium IPA di SMA Labschool Cibubur. Semakin mencukupi tersedianya fasilitas K3 maka akan semakin sedikit kemungkinan terjadinya kecelakaan yang terjadi. Setelah mengikuti kegiatan pelatihan implementasi K3, ada peningkatan budaya K3 di laboraturium SMA Labschool Cibubur dalam hal ini kepatuhan dan kesadaran seluruh siswa dan guru untuk mengikuti SOP K3, penggunaan alat pelindung diri yang tepat, kelengkapan sarana dan prasarana K3, dan personil yang mempunyai pengetahuan K3 yang memadai.

Augmented Reality and Student Learning: Analysis of Mental Models of Salt Hydrolysis at SMAN 51 Jakarta, Indonesia Umayah, Anisa; Paristiowati, Maria; Dianhar, Hanhan; Hasibuan, Nur Azizah Putri
Journal of Educational Management and Learning Vol. 1 No. 1 (2023): August 2023
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/jeml.v1i1.53

This study aimed to ascertain students' mental models while learning about salt hydrolysis through augmented reality (AR). The study comprised 36 participants from Public High School 51 in Jakarta. A descriptive qualitative approach was adopted for this research, employing various data collection methods such as written drawings, interviews, classroom observations, teacher notes, student worksheets, and final tests. In categorizing students' mental models, three main types emerged: scientific, synthetic, and initial mental models. The findings revealed that 7.20% of students fell into the initial mental model category, 53.90% exhibited synthetic mental models, and 38.90% demonstrated scientific mental models. Notably, incorporating AR into salt hydrolysis learning predominantly influenced the development of synthetic mental models. The study's results also indicated that the utilization of AR positively enhanced students' spatial abilities in understanding submicroscopic representations.

Integration of Various Digital Media with Flipped Classroom Models in Chemistry Learning: An Analysis of Student Activities Paristiowati, Maria; Dianhar, Hanhan; Hasibuan, Nur Azizah Putri; Fitriani, Roisyah
Orbital: Jurnal Pendidikan Kimia Vol. 8 No. 1 (2024): Orbital: Jurnal Pendidikan Kimia
Publisher : Chemistry Education Department of Education and Teaching Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/ojpk.v8i1.21928

This study aims to analyze student activity in flipped learning environments and their response to chemistry learning. The variations of digital media used in this research are YouTube, Miro, Wizer.me, Quizizz, Google Form, and Google Classroom. Participants are 11th grade public high school in Depok city, West Java, Indonesia. The method used is a descriptive qualitative method with data collection techniques through observation sheets, teacher diaries, interviews, reflective journals, and student activity questionnaires. The activity questionnaire in this study used StRIP, adapted from DeMonbrun, et al. Activity indicators consist of two dimensions: student response to instruction and instruction type dimensions. Student activity data is processed using a Likert scale. The results showed that the majority of students responded positively to the second dimension. The results showed that students' responses to instructions and types of instructions developed well during the learning process. This is consistent with the results of the student questionnaire data, which shows a percentage of >70% in each dimension. The affective domain shows that some students have a good attitude of responsibility and discipline. They actively express their opinions and work together in groups. In the psychomotor domain, the students show that they are careful in carrying out and compiling the practicum reports. This study concludes that the flipped classroom learning model using various digital learning media can help develop students' activities in chemistry learning.

PELATIHAN PENGEMBANGAN INSTRUMENT TEST DIAGNOSTIK THREE-TIER DI MGMP KIMIA JAKARTA SELATAN 2 Syaadah, Rika Siti; Nanda, Elsa Vera; Dianhar, Hanhan
Jurnal Abdimas Bina Bangsa Vol. 5 No. 2 (2024): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v5i2.1351

Chemistry considered as diffiuclt subject because studies abstract things. Atomic structure is one of chemistry fundamental topic which is abstract. Most of students have misconception about this topic. Misconceptions held by student will caused students to have difficulty in learning other chemical materials. This community service activity aims to improve the competence of chemistry teachers in MGMP South Jakarta 2 in developing three-tier diagnostic test insturments to detect misconceptions. The methods used are presentations, group discussions, and three-tier misconception identification practice. The results show that the teacher are enthusiastic in participating to join this community service activity and have a high motivation to develop diagnostic test instrument on other chemical materials. This activity is expected to help the teachers in diagnosing student learning difficulties, so the teachers can choose more veried learning strategies to implement in learning activities then students’ understanding of chemical materials can be improved

Gelatin Extraction and Characterization from Femur Bones of Bovine and Porcine with Acid Process Purwantiningsih Sugita; Muhamad Rifai; Ambarsari, Laksmi; Rahayu, Dyah Utami Cahyaning; Dianhar, Hanhan
Jurnal Jamu Indonesia Vol. 6 No. 1 (2021): Jurnal Jamu Indonesia
Publisher : Tropical Biopharmaca Research Center, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jji.v6i1.188

Gelatin has been widely used as an additive in food industry pharmaceutical, and cosmetic. The similar physical appearance between bovine and porcine gelatin causes an issue for some communities like a Muslim due to awareness of halal food. This study aims to produce gelatin from femur bones of bovines with acid hydrolysis and their characteristics compared to standard gelatin of bovine and porcine. Bovine and porcine bones were soaked in 5% HCl for 10 days and every 2 days a HCl solution was replaced to get ossein. Ossein is hydrolyzed by gradual heating at 65, 75, and 85oC. Gelatin confirmed by the physico-chemical characters, FT-IR and analysis amino acid with HPLC.The results showed that the yield of bovine gelatin was 4.33%. The physico-chemical characters of bovine gelatin resulting from isolation and bovine gelatin standards are in conformity with porcine gelatin standards and meet the requirements of SNI 06-3735-1995 and GMIA. Therefore, bovine gelatin is specifically capable of substituting porcine gelatin for application in the pharmaceutical field. The FTIR spectrum of bovine gelatin shows the presence of amide A, amide I, amide II and amide III groups. The amino acid characters of gelatin were identified as glycine (13.57%) and proline (1.62%) for bovine gelatin and glycine (0.51%) and proline (0.09%) for porcine gelatin.

Pemanfaatan Limbah Minyak Jelantah dan Kulit Jeruk sebagai Lilin Aromaterapi dalam Rangka Menunjang Program Kewirausahaan di Lingkungan MGMP Kimia Jakarta Timur 2 Pratiwi, Yussi; Dianhar, Hanhan; Amelia, Rizky; Nurhasanah, Nurhasanah; Fadillah, Muhammad
Jurnal SOLMA Vol. 12 No. 3 (2023)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v12i3.12684

Background: Many efforts are made to manage used cooking oil waste, namely by reusing it into a useful product such as aromatherapy candles by using the addition of fragrances such as essential oils contained in orange peels which can stabilize the nervous system, cause a relaxing effect, and as a mosquito repellent. The utilization of used cooking oil and orange peel is one of the efforts to minimize waste and make it an economically valuable product. The purpose of this activity is to utilize waste cooking oil and orange peels so that they become products that can be of economic value in the East Jakarta MGMP 2 environment. Method: Counseling and demonstrations held at PKP Jakarta Islamic School High School in August 2023. The data collection techniques were carried out by observation and questionnaire then the data was analyzed descriptively. Results: Chemistry teachers in the East Jakarta MGMP 2 environment are very enthusiastic and give a positive response to the activity of making aromatherapy candles from waste cooking oil and orange peels with the aim of minimizing environmental pollution so that the concept of simple waste treatment can be achieved. In addition, it can also create activities for the community so that it can help the community's economy through entrepreneurship. Conclusion: Waste cooking oil and orange peels can be utilized as aromatherapy candles to help the community's economy and improve environmental quality due to waste cooking oil that is not properly processed.

Isolation and Structural Characterization of Biflavonoids from Araucaria hunsteinii and Araucaria columnaris: Chemotaxonomic and Pharmacological Perspectives Sugita, Purwantiningsih; Ningtias, Widya Sekar Ayu; Priandanda, Rafi Chandra; Ilmiawati, Auliya; Kurniawanti, Kurniawanti; Agusta, Dhea Demitri; Dianhar, Hanhan; Rahayu, Dyah Utami Cahyaning
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 2, November 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i2.46173

Biflavonoids are a distinctive class of dimeric flavonoids known for their diverse biological activities and chemotaxonomic significance. In this study, two biflavonoids were isolated from the acetone extracts of Araucaria hunsteinii twigs and Araucaria columnaris leaves collected from Bogor Botanical Garden, Indonesia. Chromatographic techniques, including Sephadex LH-20 column chromatography and preparative thin-layer chromatography, were employed for purification, followed by structural elucidation using LC-MS/MS and 1D/2D NMR spectroscopy. The compounds were identified as 4',4''',7,7''-tetra-O-methylcupressuflavone (1) and 7-O-methylcupressuflavone (2). Notably, this is the first report of 7-O-methylcupressuflavone isolated from A. columnaris leaves, providing new chemotaxonomic insights into the genus Araucaria. A literature-based pharmacological analysis revealed promising cytotoxic and α-glucosidase-inhibitory activities of the isolated compounds. These findings contribute to the phytochemical profiling and highlight the pharmaceutical potential of Araucaria-derived biflavonoids.

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