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All Journal Jurnal Pendidikan Kimia Indonesia ELT Worldwide: Journal of English Language Teaching Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Indonesian Journal of Chemistry Dinamisia: Jurnal Pengabdian Kepada Masyarakat Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal Politik dan Pemerintahan Daerah Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Jurnal Akuntansi & Perpajakan Jayakarta JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Jurnal Pengabdian kepada Masyarakat Nusantara Mattawang: Jurnal Pengabdian Masyarakat Panrannuangku Jurnal Pengabdian Masyarakat NUSRA: Jurnal Penelitian dan Ilmu Pendidikan Jurnal Akademika Kimia JURNAL PENELITIAN BIDANG PENDIDIKAN Edu Research : Jurnal Penelitian Pendidikan Innovative: Journal Of Social Science Research RESPON Jurnal Ilmiah Mahasiswa Ilmu Komunikasi AGROLAND: The Agricultural Sciences Journal Jurnal Akademika Kimia PIAF : Paser Institute Journal Of Accounting And Finance Kajian Ilmiah Mahasiswa Administrasi Publik (KIMAP)

Sitti Rahmawati

Program Studi S-1 Pendidikan Kimia, FKIP, Universitas Tadulako

Author-ID : 614925

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Ekstrak Enzim Protease Dari Daun Palado (Agave Angustifolia) Dan Pemanfaatannya Dalam Proses Pembuatan Virgin Coconut Oil Male, Kasmir Sy.; Nuryanti, Siti; Rahmawati, Sitti
Jurnal Akademika Kimia Vol 3, No 3 (2014)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (468.057 KB)

Virgin coconut oil (VCO) can be made in several ways, namely through a heating process at low temperature, freeze-drying, fermentation, enzymatic, mechanical pressure or centrifugation. VCO with an enzymatic method is the making of VCO fromcoconut milk by using enzyme. The protein-oil bonds in the emulsions in coconut milk can be broken down into protease enzyme. The purpose of this research is to extract the protease enzyme in palado leaves and utilize the enzymes in the manufacturing process as well as determining the quality of VCO. This research method passed through some processes. Firstly enzyme extracts from palado leaves are prepared and coconut milk from coconut cream is made, then it is tested qualitatively the presence of protease enzyme with ninhydrin color reagent. Furthermore, the making of VCO enzymatically is undertaken by varying the ratio of the volume of coconut cream and enzyme extracts of 24 hours. VCO quality is analysis by using the parameters of smell, flavor, color, moisture content, levels of FFA (free fatty acid) and peroxide. The testing result with ninhydrin reagent gave a positive reaction (blue-purple) showing that there is enzymes alleged a class of protease in the palado leaf. The result of VCO made with the comparison of coconut cream and enzyme extracts from palado (10 : 1) has generate a VCO with a yield of 25.4%. However, from the analysis of VCO quality test results, it is obtained the smell of distinctive flavor oils, fragrance, the clean color, water content of 0.5% , FFA content of 0.25% and the peroxide number of 0 meq/kg.

PENINGKATAN HASIL BELAJAR KIMIA MENGGUNAKAN MULTIMEDIA PADA MATERI IKATAN KIMIA KELAS X SMK NEGERI PARIGI SELATAN Jumadil, Jumadil; Gonggo, Siang Tandi; Rahmawati, Sitti
Jurnal Akademika Kimia Vol 2, No 1 (2013)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.179 KB)

This study aims to determine whether to use the multimedia macromedia flash points can increase the activity and learning achievement of students in the chemical bond subject at class X SMK South Parigi. The sample is a class X SMK south Parigi is 46 students. This research is the Classroom Action Research (PTK) type which was implemented in three cycles, where each cycle consists of four stages, namely: planning, implementation, observation, reflection. Data obtained from each cycle were analyzed to determine the corrective action in the next cycle. Data collection is carried out through a test which consists of post tests at each end of the learning cycle 1, 2, 3 and also interviews for the entire series of events during the activity, as well as the observation sheet activities of teachers and students of each meeting. The collected data were statistically analyzed using the average of the class, classical absorption, and the thoroughness of learning. On the cycle I the average value of 6.87, the absorption of classical learning 68.81% and 68.42% completeness, in the second cycle the average value was 7.73, 77.32 and 88.37% and classical absorption the completeness study on a third cycle of the average value was 8.23, the absorption of classical learning 82.33% and 93.33% completeness. While on the student activity, the cycle I get an average score of 27 which is an increase in the second cycle to 36 and 40 in cycle III with both criteria. Therefore, the use of power point and multimedia macromedia flash in learning can improve student learning activities and results.

PEMANFAATAN DAUN PALADO (Agave sp) DALAM PROSES PEMBUATAN VIRGIN COCONUT OIL (VCO) Nuryanti, Siti; Rahmawati, Sitti; U.B., Sitti Nadira
Jurnal Akademika Kimia Vol 2, No 2 (2013)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.525 KB)

VCO lately has been used in medical area especially as a medicine for diabetes mellitus, obesity, cholesterol, heart, osteoporosis and can be used to cure diseases that caused by microbial and fungal. VCO also acts as antibiotic because it contains lauric and oleic acid. The availability of VCO materials in Indonesia is abundant, therefore to be developed as a medicine substance, the process of VCO making should be without any chemical material and high heating. The aim of this research is the utilization of palado leaves in the making process of VCO as well as to determine its quality. The method used in this research is the preparation of palado leaves fiber sample, preparation of cream coconut milk with coconut, the making of VCO fermentative for 20 hours and quality test for the VCO made with extra palado leaves by using parameters of colour, smell, the acid number, peroxide number, water content, refractive index and specific gravity, as a comparison is a commercil VCO (Celebes brand). Data analysis used is descriptive qualitative. The research result shows that VCO made with extra palado leaves has clear colour, normal smell, savory taste, while its acid number is 0.4 mg/g, peroxide number is 1 meq/g, water content is 1%, refractive index is 1.44804 and density is 0.888 g/ml. On the other hand, VCO Celebes has clear colour, normal smell and savory taste, while its acid number is 0 mg/g, peroxide number is 0 meq/g, water content is 0%, refractive index is 1.44803 and density is 0.892 g/ml. The conclusion of this research is that the palado leaves can be used in the making process of VCO and the VCO produced is suitable to APCC standard.

KKN-PPM Pengembangan Rumah Pangan dan Klinik Tumbuhan Obat untuk Pemenuhan Pangan dan Gizi serta Peningkatan Derajat Kesehatan Masyarakat Berbasis Education for Sustainable Development Rahmawati, Sitti; Hasriyanty, Hasriyanty; Panggeso, Johanis
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol 3 No 1 (2019): Vol 3 No 1 (2019): JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : Dewan Pimpinan Daerah (DPD) Forum Dosen Indonesia JATIM

This real working lecture program - community empowerment learning was aimed at assisting the target community in developing Lestari House of Food (LHF) and Clinic of medicinal plants to meet the needs for food and nutrition and to increase the community?s health on the basis of Education for Sustainable Development (ESD). Through this program, the target community would increase their knowledge and skills in utilizing local resources optimally, especially in managing lands intensively. To achieve the program objectives, there was empowering program done to the target groups, including (a) disseminating the real working lecture program - community empowerment learning to the regional Government, especially to related technical units, local Government, and target groups, (b) extension regarding to the importance of utilizing lands intensively in developing Lestari House of Food and the clinic of medicinal plants, (c) participatory training to improve skills of the target groups in identifying potencies, problems, and opportunities of business development, as well as planning, actuating, monitoring, and evaluating programs / activities,  (d) technical training for Lestari House of Food and medicinal plants clinic, and (e) assistance in managing the land intensively by involving resources namely families and target community group in participatory method. The goal achieved by this program was the increase in knowledge and skills of the community in utilizing the potential resource in the form of lands to improve their income and prosperity on the basis of technological innovation and local wisdom, which is oriented to Education for Sustainable Development.

PKM Pelatihan Dan Workshop Pembuatan Briket Arang Dan Asap Cair Pada Perkebunan Kakao Di Desa Budi Mukti Kecamatan Damsol Hamzah, Baharuddin; Rahmawati, Sitti
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol 2 No 2 (2018): JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : Dewan Pimpinan Daerah (DPD) Forum Dosen Indonesia JATIM

This Community Partnership Program involved partners of farmer group in Budimukti Village, Damsol District,Donggala Regency, namely Panca Jaya and Subur Jaya farmer groups. Problems faced by both partners were: a) Cocoa shellsaround the cocoa plantations were increasingly piling up and left without handling because there was no technology toprocess the waste to have economic value to improve community?s standard of living. b) The surrounding community did notknow that cocoa shells can be processed to be charcoal briquettes as an alternative fuel to replace kerosene and to be liquidsmoke as a natural insecticide and preservative. c) They did not have skills in making charcoal briquettes and liquid smokefrom cocoa waste as raw material. The program aimed at improving farmers' knowledge and skills in designing technology tomake charcoal briquettes from cocoa shell waste and techniques in making liquid smoke from cocoa shell waste and theirrespective uses. The methods used were counseling and training as well as the practice of designing technology to makecharcoal briquettes and assembling technology for making liquid smoke from cocoa shell waste. Assistance to members ofpartnership groups was carried out with Participatory Methods. Extension activities were carried out in an effort to improvetheir knowledge, while training and demonstration plots were carried out in an effort to accelerate the process of technologytransfer to the community. The end results of this program were the increase in farmers? knowledge and the availability oftechnology packages for making charcoal briquettes and making liquid smoke from cocoa shell waste, so that the targetgroups can be independent in carrying out business activities using cocoa shell waste using the technology that had beenpracticed, on an ongoing basis

PKM Musyawarah Guru Mata Pelajaran (MGMP) Kimia Kabupaten Donggala Dalam Penyusunan Dan Publikasi Karya Ilmiah Rahmawati, Sitti; Hamzah, Baharuddin
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol 4 No 2 (2020): Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : Dewan Pimpinan Daerah (DPD) Perkumpulan Dosen Indonesia Semesta (DIS) Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36339/je.v4i2.312

Partners of this service activity are Chemistry teachers who are members of the Donggala District Teacher Meeting (MGMP). The problems faced by the partner groups, including members of the Chemistry Subject Teacher Conference (MGMP), still experienced difficulties in: a) designing the implementation of CAR in the learning process (how to identify problems, select and formulate topics and titles for classroom action research, b) apply models learning and learning media in the implementation of CAR and how to collect data that is appropriate and efficient, c) scientific reading tracing techniques, especially in the form of journals to be used as a reference for writing (literature search), d) analyzing and interpreting data obtained during research, e) making instruments research, especially CAR and data presentation techniques, f) writing techniques and submitting article manuscripts to scientific journals and the lack of resource persons. The purpose of this PKM is to provide assistance and training for chemistry teachers, especially those who are members of the Donggala District Chemistry MGMP in preparing research reports and articles that meet the requirements for publication in scientific journals, preceded by training in processing and analyzing research data.. The method used in this PKM activity is conducting training and workshops on the implementation of CAR, making research instruments, processing and analyzing research data. Furthermore, they will assist partners in preparing the PTK report and its publication and can process the PTK research data into the form of scientific paper articles and published in ISSN journals or at national level scientific seminars. The implementation of workshops and training on the preparation and publication of scientific papers is very beneficial for the Chemistry MGMP of Donggala Regency which has had difficulty meeting the requirements for promotion in the field of writing scientific papers. In the application of the practice of writing articles, three members of the Chemistry MGMP of Donggala Regency, have made classroom action research reports, processed data and wrote in scientific articles, and temporarily reviewed them for publication in interactive journals.

KINETICS OF THE OXIDATION OF VITAMIN C Sitti Rahmawati; Bunbun Bundjali
Indonesian Journal of Chemistry Vol 12, No 3 (2012)
Publisher : Universitas Gadjah Mada

Vitamin C or ascorbic acid is needed by the human body but it is already damaged by the rise in temperature due to be oxidized to L-dehydroascorbic acid. This research aims to determine the kinetics of oxidation of ascorbic acid due to an increase if temperature (40-80 °C) and to design an ascorbic acid oxidation reaction laboratory module to be applied in the senior high school reaction kinetics curriculum. The determination of the kinetics of the oxidation of ascorbic acid applies the integral and half-change time methods, while the concentration of the remained ascorbic acid in sixty minute intervals is determined by iodimetric titration method. Decomposition of ascorbic acid was measured at 40, 50, 60, 70 and 80 °C. The results of this research indicate that at 40, 50, 60, 70 and 80 °C the kinetics of the oxidation of ascorbic acid is a first-order reaction with rate constants of 4.55 x 10-4, 5.85 x 10-4, 8.4 x 10-4, 1.1 x 10-3 and 1.015 x 10-3 min-1, respectively. Pre-exponential factor or the frequency of collisions is a factor which is a measure of the collision rate. The activation energy and the pre-exponential factor for the oxidation of ascorbic acid were found to be 20.73 kJ.mol-1 and 1.372 min-1. The procedure used in this study was modified into a laboratory module will be applied in the teaching of reaction kinetics at the senior high school level.

Ab Initio Study of Proton Transfer and Hydration in Phosphorylated Nata de Coco Sitti Rahmawati; Cynthia Linaya Radiman; Muhamad Abdulkadir Martoprawiro
Indonesian Journal of Chemistry Vol 17, No 3 (2017)
Publisher : Universitas Gadjah Mada

This research aims to calculate energetics parameters, hydrogen bonding, characteristics local hydration, and proton transfer in phosphorylated nata de coco (NDCF) membrane using ab initio method. The minimum energy structure of NDCF membranes and the addition of n water molecules (n = 1-10) determined at the B3LYP/6-311G** level indicates that proton dissociation requires a minimum of four water molecules. Dissociated protons stabilize with the formation of (hydronium, Zundel, Eigen) ions. Calculation of the interaction energy with n water molecules indicates an increasingly negative change in energy (ΔE) and enthalpy (ΔH), and hence an increasingly positive interaction with water molecules. This interaction facilitates the transfer of protons in the membrane matrix. Calculation of the rotational energy at the center of C-O indicates that the pyranose ring structure, with a maximum barrier energies of ~ 12.5 J/mol, is much more flexible than the aromatic backbones of sulfonated poly(phenylene) sulfone (sPSO2) and the polytetrafluoroethylene (PTFE) backbones in perfluorosulfonic acid ionomers (PFSA). These energy calculations provide the basis that the flexibility of the pyranose ring and the hydrogen bonding between water molecules and phosphonate groups influence the transfer of protons in the membrane of NDCF.

Pemberdayaan Masyarakat Melalui Penerapan Teknik Integrasi Tanaman-Ternak Berbazis Zero Waste Agriculture Nur Hayati; Sitti Rahmawati; Usman Made; Haerani Maksum; Sri Anjar Lasmini; Rosmini Rosmini
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 1 (2021): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v5i1.4596

The potential of agricultural and livestock resources in Pombewe Village is quite available but not yet optimally utilized by the community. Agricultural land is still largely abandoned and livestock are still left to graze themselves. The problem faced by the community is the lack of skills on how to improve agricultural products. This community empowerment program aims to assist the community in applying the integration of zero waste agriculture techniques. The method applied is community development with activities in the form of counseling, training, demonstration plots and mentoring with output targets is to increase the community's insight, knowledge and skills. The results achieved were an increase in community knowledge and skills characterized by the ability of the community to use agricultural and livestock waste to be economically valuable by making liquid organic fertilizer, compost, and can cultivate forage grass as animal feed

The Analysis of the Honesty and Responsibility Characters of Chemistry Education Study Program Students on Examinations Suherman Suherman; Sitti Rahmawati; Kasmudin Mustapa; Detris Poba; Nur Azizah
Jurnal Akademika Kimia Vol. 10 No. 3 (2021)
Publisher : Universitas Tadulako

Honesty and responsibility should be a principle held by students. But, there are still problems of dishonesty and irresponsibility of students during exams. This study aimed to analyze the honesty and responsibility character of chemistry students during exams. The research samples were 39 students. Data were collected by observation and interviews technique, by using observation and questionnaires sheets. Data were analyzed by using descriptive statistics. The results showed that the honesty and responsibility of chemistry students were in the sufficient category where the percentage of honesty and responsibility of students based on the observation sheets was 43.6% and 49%, respectively. While the questionnaire responsibility students were 46.2% and 43.6%, respectively.

Co-Authors Abram, Paulus H. Adjis, Moh. Asril Afadil Agustin Tiwow Agustina, Rizza R. T. Ahdan, Ahdan Ahdiat, Mohammad Ahmar, Ansari Saleh Akidah, Ihramsari Alifa, Nur Alimuddin, Chatifah Anam, Chaerul Anang Wahid M.Diah Andi Pertiwi Damayanti Andi Saifah Anggriani, Windi Arwansyah Asmita, Asmita Awaru, Tenri Ayu, Ari Azzajjad, Muhammad Fath Baharuddin Hamzah Basoa, indah Ekawati Bunbun Bundjali Cynthia Linaya Radiman Daini, Dinda Ulan Dandi Daud Karel Walanda Detris Poba Detris Poba Dewi Satria Ahmar Dia Afrianti Sangkota, Vivi Dr. Idris, S.S., M.Hum Dr. Muhammad Asdar, M.Pd. Eka Andani , Siti Nur Fatmawati, Fatmawati Fuad, Fawwas Roihan Gheje, Walburga E. Hadawiah, Hadawiah Haerani Maksum Halida, Nur Hardani, Muhammad Fakhrul Hasfat, Hamsar Hasriyanty Hasriyanty Hengki Abram, Paulus Ifriana, Ifriana Ijirana Indah Sari, Nurul Irwan Said Jamaludin M Sakung Johanis Panggeso Jumadil, Jumadil Kasmudin Mustapa Kumala Putri P, Andi Sri Linawati Linawati Magfirah Magfirah, Magfirah Majid, Abd Male, Kasmir Sy. Manalu, Yessi Febianti Mangela, Yessika D. Mery Napitupulu Metoli, Erwin Priscal Muhamad Abdulkadir Martoprawiro Muhammad Arham Muhammad Zikra Nadi, Luh Novita Sari Nur Anisa Nur Azizah Nur Hayati Nurbaya Nurbaya, Nurbaya Nurfadila, Safna Parmin - Pathuddin Patmasari, Andi Paulus Hengky Abram Pulukadang, Sri H. V. Purnama Ningsih Pusvita , Arwini Rabasia Rabiah, Sitti Ririen Hardani Rofifah Marzuki, Nur Rosmini Rosmini S, Afadil S. Ahmar, Dewi Sanggona, Nadya Marsyella Sangkota, Vivi Dia A. Sangkota, Vivi Diah Sari, Nurita Sari, Nurul Indah Selvy Mozin Siang Tandi Gonggo Siti Fatimah Siti Nuryanti Sitti Aminah Sri Anjar Lasmini Sri Hastuti Virgianti Pulukadang Sri Muliani, Sri Sri Mulyani Sabang Sri Sarjuni Sriyulaningsi, Sriyulaningsi Sufia, Sufia Suherman Suherman Suherman Suherman Suherman, Suherman Suhestin Mooduto Sukmawati Putri , Iin Tahril Tandi, Asri Taslima Thaha, KHaeruddin Tiwow, Maria V. Tonio, Sarinah Emilia Tri Santoso Tri Santoso U.B., Sitti Nadira Umar Mansyur Ummiani Hatta Usman Made Wahab, Zamil Wahda Nur Alisa WINARSIH Winda Winda Yuana Stesya Palunsu Yuli Nurmayanti Yuyun Elfrina Manjarara Zelfia

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