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All Journal CHEMISTRY PROGRESS Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Teknologi Jurnal Ilmiah Mahasiswa FEB Jurnal Riset Kimia Jurnal Penelitian Sains SCIENCE TECH: Jurnal Ilmiah Ilmu Pengetahuan dan Teknologi JCES (Journal of Character Education Society) Chemistry Indonesian Journal of Chemical Research Martabe : Jurnal Pengabdian Kepada Masyarakat Walisongo Journal of Chemistry Jambura Journal of Chemistry Eksakta : Berkala Ilmiah Bidang MIPA Journal of Environmental Science and Sustainable Development Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN JAMMI These proceedings represent the work of researchers participating in The International Conference on Elementary Education (ICEE) which is being hosted by the Elementary Education Study Programme School of Postgraduate Studies, Universitas Pendidikan Jurnal Bio-Geo Material Dan Energi Experiment: Journal of Science Education Jurnal IPTEK Bagi Masyarakat JIPMukjt:Jurnal Ilmu Pendidikan Muhammadiyah Kramat Djati Jurnal Pustaka Mitra : Pusat Akses Kajian Mengabdi Terhadap Masyarakat Kolaborasi Jurnal Pengabdian Masyarakat JSEP (Journal of Science Education and Practice) JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) Jurnal Karya Abdi Masyarakat Journal of Education Technology Information Social Sciences and Health Jurnal Pemberdayaan: Publikasi Hasil Pengabdian kepada Masyarakat (JPM ITTC ) Journal of Economics Publish : Basic and Applied Research Publication on Communications Paradharma: Jurnal Aplikasi IPTEK Jurnal Edukasi Biologi Journal of Islamic Education Students Asian Journal of Early Childhood and Elementary Education al Kimiya : Jurnal Ilmu Kimia dan Terapan JURNAL REKAYASA KIMIA & LINGKUNGAN ijces Analit: Analytical And Environmental Chemistry
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Profile Analysis of Fatty Acids of Tengkawang (Shorea Sumatrana) Oil Using GC-MS and Antibacterial Activity Riski, Diah Gusti; Maulana, Rico Gewana Resdy; Permana, Edwin; Lestari, Intan; Tarigan, Indra Lasmana
Indonesian Journal of Chemical Research Vol 8 No 2 (2020): Edition for September
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2020.8-dgr

Abstract

The Shorea sumatrana (tengkawang) plant is endemic to Indonesia, especially in Kalimantan and Sumatera regions, which produces chemical diversity especially as a natural drugs. Specific aims to investigate both the profile analysis of fatty acid and antibacterial potential of tengkawang oil. The extract of tengkawang oil was carried out using the soxhlet extraction method. The profile analysis of fatty acid was verified by GC-MS and the antibacterial activity was evaluated using disc-diffusion method. The profile analysis of fatty acid of tengkawang oil indicated the presence of palmitic acid (17.26%), stearic acid (60.68%), oleic acid (11.98%), oleic acid chloride (1.80%), stearic acid chloride (1.86%), glycidyl stearate (1.92%), diethyl phthalate (4%), and 2-monopalmitin (0.5%). We determined the antibacterial activity by the diameter of inhibition of growth zone against Salmonella enteritidis, Escherichia coli, Staphylococcus aureus, and Bacillus cereus at a concentration of 12.5%, 25%, 50%. These were compared with standard tetracycline as positive control and DMSO was assigned negative control. It was found that the highest percentage of fatty acid in tengkawang oil is stearic acid, at 60.68%, and that tengkawang oil is an antibacterial agent with a concentration optimum at 25% with more susceptibility to Gram-positive than Gram-negative bacteria.
Peningkatan Aktivitas Belajar Mahasiswa Pada Mata Kuliah Kimia Instrumentasi Menggunakan Pembelajaran Berbasis Proyek Secara Online Susanto, Nindita Clourisa A; Rahmi, Rahmi; Lestari, Intan; Sutrisno, Sutrisno
Experiment: Journal of Science Education Vol 4, No 1 (2024)
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/experiment.v4i1.27129

Abstract

Learning in the 4.0 revolution era requires teaching staff to prepare innovative and creative learning models and methods according to students' needs. To meet these needs, the role of technology is needed in its implementation. An online learning system via LMS is the right solution for today's students. To foster collaboration between students and increase learning activities, a project-based learning model was chosen. Teaching materials were developed using Dick and Carey's development design through several stages leading to formative evaluation. The resulting product is then implemented in large lecture classes. The results of the implementation show that there has been an increase in student learning activities when implementing this learning. The percentages of each activity in sequence are giving consideration activities reaching 95.15%, training activities reaching 91.21%, interpreting activities reaching 71.96%, applying activities reaching 68.30%, evaluating activities reaching 66.18%, and creative activity reached 51.24%. The results of student learning activities show a tendency for students' thinking structures from easy things to difficult things.
Penerapan Pembelajaran Berbasis Proyek Menggunakan Metode Blended Learning untuk Meningkatkan Hasil Belajar Mahasiswa Sutrisno, Sutrisno; Lestari, Intan; -, Rahmi -
Experiment: Journal of Science Education Vol 4, No 1 (2024)
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/experiment.v4i1.27128

Abstract

The aim of this research is to improve student learning outcomes in chromatographic analysis courses by implementing a project-based learning model using a blended learning method, namely face-to-face and online via the Learning Management System (LMS) platform. Chromatographic analysis is known as a subject that is theoretically easy to understand, but in the analysis of chemical reactions that occur in the separation process it is still difficult for students to describe so that appropriate visualization technology needs help in describing the process of chemical reactions occurring when the separation takes place. Material using the project-based learning model in the LMS was developed using the Research and Development (RD) 4-D Model (four D model) method. Next, a formative evaluation is carried out for the testing stage of the teaching material. The application of this learning shows that students experience increased understanding in analyzing material and can complete projects that are presented well in class. The advantage of implementing the blended learning method is that students can access the material repeatedly and can confirm during face-to-face lectures in class. The application of the project-based learning model is able to direct students to be more active in solving direct problems, compiling them in the form of reports and presenting the results they have obtained. In this way, students learn to be more responsible in completing projects given by the lecturer and student learning outcomes increase.
Optimalisasi Manajemen Stres sebagai Upaya Peningkatan Kinerja Perawat di Rumah Sakit Rohita, Tita; Nurkholik , Dedeng; lestari, Intan; Nuralam, Deni; Indriyani, Indriyani; Lesmana, Indra
Kolaborasi: Jurnal Pengabdian Masyarakat Vol 4 No 3 (2024): Kolaborasi: Jurnal Pengabdian Masyarakat
Publisher : Yayasan Inspirasi El Burhani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56359/kolaborasi.v4i3.379

Abstract

Introduction High stress among nurses can affect the performance and quality of services in hospitals. Effective stress management is the key to improving nurse performance and the quality of health services. Therefore, optimizing stress management is an important focus in efforts to improve nurse performance. The aim of this service aims to optimize stress management strategies and evaluate their impact on improving the performance of nurses in hospitals. The methods used include stress management training for nurses in hospital inpatient rooms. Data was collected through surveys, interviews, and observations before and after strategy implementation. Results Nurse performance scores and stress levels were measured using a questionnaire. Before implementing the strategy, the average nurse performance score was 3.5 with an average stress level of 4.2. After implementing the stress management strategy, the performance score increased to 4.1 and the stress level decreased to 3.2, indicating that the stress management strategy was successful in improving nurse performance and reducing stress levels. Optimizing stress management is effective in improving nurse performance and reducing stress levels in hospitals. This program makes a positive contribution to the quality of health services and the work welfare of nurses. Recommendations include continued implementation of these strategies and provision of additional support for nurses.
PENGEMBANGAN LKPD BERBASIS PROJECT BASED LEARNING UNTUK MENINGKATKAN KETERAMPILAN KOLABORASI SISWA MATERI BIOTEKNOLOGI Lestari, Intan; Rakhmawati, Anna
Jurnal Edukasi Biologi Vol 10, No 2 (2024): Jurnal Edukasi Biologi
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/edubio.v10i2.19644

Abstract

Abstrak. Tujuan penelitian ini adalah mengetahui kelayakan dan kepraktisan LKPD berbasis project based learning (PjBl) untuk meningkatkan keterampilan kolaborasi siswa pada materi bioteknologi siswa. Jenis penelitian ini adalah RD (Research and Development) dengan model ADDIE (Analysis, Design, Development, Implementation, Evaluation), namun penelitian ini hanya sampai pada tahap develop. Subjek uji coba dalam penelitian ini adalah 1 guru pengampu biologi, dan 7 orang perwakilan kelompok siswa. Metode pengumpulan data dengan wawancara dan angket. Data hasil penelitian dianalisis menggunakan teknik analisis kualitatif dan kuantitif. Hasil penelitian berupa: 1) dihasilkan LKPD berbasis project based learning materi bioteknologi dengan dilakukan 3 tahapan yaitu Analysis, Design, Development; 2). Penilaian dari ahli materi diperoleh skor 49 kategori “sangat layak”. Penilaian dari ahli media diperoleh skor 59 kategori “layak”. Penilaian dari guru biologi diperoleh skor 64 kategori “praktis”. Penilaian oleh 7 siswa diperoleh skor 65,14 kategori “sangat praktis”. Berdasarkan data yang didapatkan, maka LKPD project based learning pada materi bioteknologi layak digunakan untuk meningkatkan keterampilan kolaborasi siswa pada materi bioteknologi kelas X.
PENGARUH JUMLAH PENDUDUK, PENDIDIKAN, DAN UPAH TERHADAP PENGANGGURAN TERBUKA DI JAWA TIMUR Lestari, Intan; Solihah, Nabilatus; Fina Audilla, Yessiska; Nilasari, Aprillia
Jurnal Ekonomika : INDEPENDEN Vol 4 No 2 (2024): Agustus 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/independent.v4i2.65037

Abstract

A high population is a potential source of economic development, but if it is not balanced with job opportunities it will lead to unemployment. This research aims to look at the influence of population, education level, minimum salary on the level of open poverty in East Java 2019 - 2023. This research using a quantitative approach using panel regression analysis methods using the fixed effect model (FEM). The results show that: Through a partial test, population has a positive or insignificant effect on the level of open poverty, education level has a negative and insignificant effect on the level of open poverty, and the minimum wage has a positive and significant effect on open poverty in East Java in 2019 - 2023. Meanwhile Simultaneous tests show that population, education level and salary simultaneously influence the level of open poverty in East Java in 2019 – 2023.
Methanol Extract of Melastoma malabathricum Leaves as Eco-Friendly Corrosion Inhibitor for Mild Steel in Sulfuric Acid Gusti, Diah Riski; Lestari, Intan; Farid, Faizar; Wahyudi, Abdi; Azril; Sukor, Mohd Zaki
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 03 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol23-iss03/386

Abstract

Methanol extract of Melastoma malabathricum (MEMML) contains secondary metabolites such as phenolics and flavonoids. These compounds have OH groups that can interact with Fe contained in steel and form a thin layer for corrosion inhibition on mild steel. Inhibition of mild steel corrosion using MEMML leaves in sulfuric acid solution was carried out using weight loss and potentiodynamic polarization methods. The results showed that the mild steel corrosion rate decreased and inhibition efficiency increased with the addition of MEMML. FTIR and SEM analysis showed the interaction between mild steel with MEMML forming a layer on the surface of the steel so that it inhibits corrosion. The inhibition efficiency has increased with the length of immersion time and concentration of MML methanol extract. The highest inhibition efficiency, 98.86%, was obtained at 72 hours of immersion time and 10 g / L MEMML.
Biosorption of Methylene Orange Dye using Langsat Shell by Batch Method Kurniawati, Desy; Lestari, Intan; Tarmizi, Fadhilah; Pernadi, Niza Lian; Iqbal, Anwar
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 03 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol23-iss03/419

Abstract

Liquid waste is a major problem in the textile industry environment that has the most widespread influence because physical and aquatic characteristics can have a negative impact on waters. Most of the liquid waste produced by batik comes from the dyeing process and environmental pollution. If it is disposed of directly into the environment without prior processing, the environment has a limited ability to degrade dyestuffs. One alternative method to remove the dye in water contaminated with methyl orange is biosorption using a cheap and easily available biosorbent, such as a langsat shell. This study used a batch method with variations in pH, solution concentration, particle size, stirring speed, and contact time. The results of each variation carried out obtained the optimum conditions for the absorption of Methyl Orange, namely at: pH 4, concentration 150 mg/L, and particle size 150 μm. The adsorption isotherm study was carried out, the Langmuir equation yielded a regression coefficient value that was close to one (R2 = 0.9964) so that it could be said to be better with a maximum absorption capacity of 3.1164 mg/g
PENGUATAN KOMPETENSI GURU IPA SMA NEGERI 11 KOTA JAMBI PADA PENGGUNAAN APLIKASI CHEMDRAW Riski Gusti, Diah; Lestari, Intan; Marlinda, Lenny; Rahmi, Rahmi; Eka Wijaya, Dhian
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 8, No 2 (2025): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v8i2.777-782

Abstract

Pendidikan merupakan bagian penting dari pembangunan suatu negara karena membantu generasi muda memperoleh pengetahuan dan keterampilan yang diperlukan untuk menghadapi tantangan yang akan datang. . Dalam pendidikan Indonesia, guru di bidang ilmu pengetahuan alam harus memiliki pemahaman yang mendalam tentang konsep kimia, biologi, dan fisika. Tujuan kegiatan pengabdian ini adalah dalam rangka mengoptimalkan potensi teknologi dalam meningkatkan kualitas pembelajaran IPA di SMA Negeri 11 Kota Jambi. Penguatan kompetensi guru dalam penggunaan aplikasi ChemDraw menjadi suatu kebutuhan yang mendesak. Melalui peningkatan kompetensi ini, diharapkan para guru dapat lebih mandiri dalam merancang dan melaksanakan pembelajaran yang inovatif dan menarik, sehingga dapat meningkatkan ketertarikan dan pemahaman siswa terhadap materi pelajaran IPA. Dengan adanya pelatihan dan pendampingan penggunaan aplikasi ChemDraw, guru-guru IPA telah mengetahui dan penerapan penggunaan aplikasi ChemDraw.
Analisis Sistem Informasi Akuntansi Terhadap Kinerja Perusahaan Pada Hotel Pantai Mutiara Pelabuhan Ratu Sukabumi Lestari, Intan
Jurnal Akuntansi UMMI Vol. 3 No. 2 (2023): JAMMI (Jurnal Akuntansi UMMI)
Publisher : Fakultas Ekonomi Universitas Muhammadiyah Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37150/jammi.v3i2.2003

Abstract

Accounting is explained as the process of recording, categorizing, summarizing, and reporting the company's transaction activities. Therefore, accounting information systems are used to facilitate individuals in their tasks and enable better company performance. This study aims to evaluate the effect of the application of accounting information systems on company performance, taking into account the utilization, quality, security, and supporting facilities of accounting information systems. The method used in this research is a quantitative method with an associative approach (questionnaire method). Questionnaires are used to assess managers' perceptions of information system utilization, information system quality, information system security, and means of supporting accounting information systems, as well as their influence on company performance. From this study it was found that the application of accounting information systems has a positive and significant effect on company performance. Utilization, quality, security, and means of supporting accounting information systems have a positive and significant effect on company performance. Therefore, increasing the application of accounting information systems in hotels can improve the performance of management companies. In addition, managers' perceptions of the usefulness of accounting information systems greatly influence the utilization of these systems. Therefore, companies should pay attention to managers' and employees' perceptions of the usefulness of accounting information systems to ensure effective use of these systems.
Co-Authors -, Rahmi - A, Muhammad Razi Abdillah Abdillah Ade Adriadi Adinda, Ladiva Agrina Lisma Agrina, Agrina Agustina, Elsi Alben Ambarita Alfernando, Oki Alkatiri, Jufri Amin, Sahrul Anna Rakhmawati Ardiwijaya, Vevin Syoviawati Ariana, Febi Arif, M. Ridwan Asep Rohman Ayu, Shinta Putri Azira, Ayu Azril Damris Muhammad Dawam Suprayogi Denny Prabawa, Aditya Desy Kurniawati Dhian Eka Wijaya Diah Riski Gusti Edwin Permana Eko Prasetyo Elisma Elisma Erda, Erda Faizar Farid Febriana - Sabrian Fina Audilla, Yessiska Grasella, Lucintania Gunawan, Anjelli Putri Gusti, Diah Rizki Hayati Sari Hasibuan Hery Widijanto Hidayat, Dara Shalsa Billah Hidayat, Vikri Idat Muqodas Indra Lasmana Tarigan Indra Lesmana Indriyani Indriyani Iqbal, Anwar Jalius Jalius Kartiko, Frananda Rizki Kastera, Viven Khatoha, Trisqa Laila Lasmana Tarigan, Indra Lenny Marlinda Mahraja, Mahra Manulang, Ermita Meisa Martina Asti Rahayu Mastutik, Diah Maulana, Rico Gewana Resdy Maya Lestari, Maya Mia Aina Muhaimin, . Muhammad Damris Munifilia Ekasari Naswir, Muhammad Natadiwijaya, Ismail Fikri Natalia, Desfaur Nelson, Nelson Ngatijo Ngatijo Nilasari, Aprillia Niswah, Coirun Nuralam, Deni Nurjamil, Dimas Setya Nurkholik , Dedeng Nurul, Ramdan Ocktavia, Tyzeka Dwi Oktarise Dwina, Dila Pernadi, Niza Lian Pradina, Armitha Dea Prasetio, Muhamad Reza Prasetyo, Widy Puji Rahayu Putra, Adrisma Juanda Qisthi, Zummul Rahmi Rahmi Rajagukguk, Yuli Evrianti Br Revis Asra Riski, Diah Gusti Rizalzi, Dewa Rustikah, Ika Sari, Avellyn Shintya Satria, Rinaldi Siti Rachmah Sofiani solihah, Nabilatus Sukor, Mohd Zaki Susanto, Nindita Clourisa A Sutrisno, Sutrisno Syahid, Alwi Syauqi, Rif’at Tarmizi, Fadhilah tekmauk, Jitro valerius Tita Rohita Uce Lestari Wahyudi, Abdi Walidatur Rofiah, Yuliana Wardhana, Alexander Tantra Wawan Setiawan Wibowo, Yudha Gusti Yohana, Agnes Vionita Zahar, Wahyudi Zusy Aryanti