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All Journal Sodality: Jurnal Sosiologi Pedesaan International Journal of Renewable Energy Development Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia English Review: Journal of English Education Indonesian EFL Journal Edulingua: Jurnal Linguistiks Terapan dan Pendidikan Bahasa Inggris JPPS (Jurnal Penelitian Pendidikan Sains) Renjana Pendidikan Dasar International Journal of Science and Society (IJSOC) EPIGRAM (e-journal) POLICY, LAW, NOTARY AND REGULATORY ISSUES (POLRI) Jurnal Natural Jurnal MIPA dan Pembelajarannya Molekul: Jurnal Ilmiah Kimia Dedikasi: Journal of Community Engagement and Empowerment Prosiding Temu Ilmiah Nasional Guru International Journal of Renewable Energy Development Muara: Jurnal Manajemen Pelayaran Nasional Jurnal Rekayasa Proses
Fitria Rahmawati
Research Group of Solid State Chemistry & Catalysis, Chemistry Department, Sebelas Maret University, Jl. Ir. Sutami 36 A Kentingan, Surakarta
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Neuroscience Physics Social Sciences Other

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Screen printed carbon electrode from coconut shell char for lead ions detection Heliani, Kinkind Raras; Rahmawati, Fitria; Wijayanta, Agung Tri
International Journal of Renewable Energy Development Vol 13, No 1 (2024): January 2024
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2024.57679

Abstract

This research aimed to produce a screen-printed carbon electrode (SPCE) from an activated coconut shell carbon. As a raw material, coconut shell char provides renewability and is abundantly available in the market. Meanwhile, SPCE offers a simple electroanalytical electrode because the working, counter, and reference electrodes are in one piece. The coconut shell carbon was activated by steam at 700 oC for 1h, producing AC700 that was then characterized to ensure the result by following per under carbon as the main component, the phases, crystal structure, surface area, morphology, and elemental content. The result showed that the surface area of AC700 is 816 m2/g, and the surface structure is porous, as identified by SEM images. Impedance analysis followed by data fitting and conductivity calculation found a high conductivity of 8.68 x 10-2 Scm‑1. The produced-SPCE or SPAC700 was modified by ferrocene at various compositions of 10%; 20%; and 30% of mass. The SPAC700-Fc30 provided the best performance for lead analysis with a detection limit of 0.35 mM, a quantitation limit of 1.17 mM, and good reproducibility with a Repeatability Coefficient (RC) of 0.022. SPAC700-Fc30 showed good lead ions detection despite under 10% Cu2+ and 10% Co2+ interferences. The result confirmed the potential use of coconut shell char as the raw material for SPCE production.
Kinetics Study on Thermal Degradation of Polystyrene and Sulfonated Polystyrene from Styrofoam Waste Pramono, Edi; Dewi, Chintya; Rahmawati, Fitria
Molekul Vol 18 No 3 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.3.7306

Abstract

This research studied kinetics of thermal degradation of polystyrene (PS), and sulfonated polustyrene (sPS) which were synthesized from styrofoam waste. The thermal study was conducted by thermogravimetric analysis (TGA) at various heating rate of 10, 15, 20 and 25 dpm. The kinetics parameters were determined by Coats Redfern (CR), Friedman (FM), Kissinger-Akahira-Sunose (KAS) and Ozawa-Flynn-Wall (OFW) models. TGA result found that PS has range thermal stability of 274 – 415 oC, but sPS has range thermal stability of 175 – 582 oC. Kinetic study to PS shows that the activation energy increases by the increasing of fraction conversion for all kinetics parameters with a regression value close to 1. While in sPS, the CR method shows an increase in activation energy value with an increasing fraction convertion. On the other hand, CR-FM-KAS and OFM methods obtained an increase in activation energy, then decreased at the fraction convertion above 0.6, and received negative activation energy. The kinetics model successfully explains the degradation of PS and sPS. In addition, the high thermal stability of sPS from styrofoam waste shows that this material has good potential as polymer electrolyte materials.
The Role of The Ni/HZSM-5 Ratio on The Anisole Hydrodeoxygenation Reaction Nugrahaningtyas, Khoirina Dwi; Nurcahyo, I F; Hidayat, Yuniawan; Rahmawati, Fitria; Fadlulloh, Zaki; Heraldy, Eddy; Qurrotul'aini, Nisriina 'Abidah
Molekul Vol 19 No 2 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.2.11105

Abstract

ABSTRACT. Bio-oil is a renewable energy source with high oxygen levels, and anisole is a chemical widely employed in research to represent it. Catalytic hydrodeoxygenation (HDO) reduces the oxygen content. A catalyst known as nickel-modified HZSM-5 has shown promising results for HDO. Meanwhile, catalyst efficiency depends on the Ni/HZSM-5 ratio. So, this study aims to determine how the Ni/HZSM-5 ratio influences the catalyst's properties, activity, and selectivity in anisole HDO. The Ni/HZSM-5 catalyst was made using the wet impregnation method with various ratios of Ni/HZSM-5. The catalysts were analyzed for their morphology using scanning electron microscopy-energy-dispersive X-ray (SEM-EDX). The diffraction patterns were studied using X-ray diffraction (XRD). Surface area and porosity were determined through gas sorption analysis (GSA). Then, the acidity strength was evaluated via temperature-programmed ammonia desorption (NH3-TPD). The characterization results show Ni was successfully impregnated and distributed evenly in HZSM-5 without changing the primary structure. Adding Ni metal to HZSM-5 increases the surface area of the catalyst but reduces its acid strength. The catalytic performance of the catalysts was then evaluated in a flow reactor at 400 °C, using 15 mL/min H2 gas. The liquid products of the reaction were analyzed using gas chromatography-mass spectroscopy (GC-MS). The results of the catalytic performance show that Ni4.5/HZSM-5 has the highest catalytic activity in anisole conversion. At the same time, Ni6.4/HZSM-5 shows the highest selectivity towards benzene-toluene-xylene (BTX). Keywords: Hydrodeoxygenation, nickel, anisole, heterogeneous catalyst, acidity.
PEMANFAATAN VIDEO PEMBELAJARAN PADA MATERI POKOK SUHU, KALOR, DAN PEMUAIAN DI SMP DARUL MUTA’ALLIMIN SIDOARJO Rahmawati, Fitria; Widiasih
Prosiding Temu Ilmiah Nasional Guru Vol. 15 No. 1 (2023): TING XV 2023
Publisher : Fakultas Keguruan dan Ilmu Pendidikan (FKIP), Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The emergence of various interesting videos when accessing the internet, makes students more comfortable watching videos compared to opening textbooks. On the other hand, the science learning outcomes of grade VII A students of Darul Muta'allimin Junior High School were found that only 10.34% of students were able to achieve KKM (>75). The study aims to implement the assignment of heat material without using paper (paperless) but using video media which is expected to increase student activity and learning outcomes of grade VII A students at SMP Darul Muta'allimin for the 2022/2023 school year. The research method used is classroom action research in the form of pre-cycle activities and carried out in 2 cycles with student activity observation instruments and student learning outcomes evaluation sheets. Analysis of the average learning outcomes of grade VII A students has increased significantly, from 54.14 to 78.96. The percentage of class learning completeness reached 79.31%. The number of students completed is 23 students. Students show readiness and activeness in participating in learning activities after getting video assignments. There are 6 students who have not been able to complete their learning influenced by several factors, namely internal factors (interests, talents, motivation, learning methods, psychological aspects) and external factors (social environment, friendships, and family). The results showed that giving video assignments was able to improve student learning outcomes on temperature, heat, and expansion material at SMP Darul Muta'allimin.
A dry cold sintering to Ta doped-lithium lanthanum zirconate solid electrolyte for all-solid-state lithium metal battery Rahmawati, Fitria; Alaih, Imam Shofid; Rosalin, Azka W; Nurcahyo, I F; Nursukatmo, Hartoto; Nilasary, Hanida; Oktaviano, Haryo S.; Raihan, Edo; Muzayanha, Soraya U.; Handaka, Muhammad F. A.
International Journal of Renewable Energy Development Vol 13, No 5 (2024): September 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60351

Abstract

Solid electrolyte is the essential part in all-solid-state battery (ASSB), in which the sintering step is vital to get a dense and high ionic conductivity. However, Li-loss frequently occurs at a high temperature, causing ionic conductivity to drop. This research investigated a dry-cold sintering process (dry-CSP) to Ta doped-LLZO (LLZTO), in which the LLZTO powder was pressed by cold isostatic pressing (CIP) at 40 MPa without solvent addition and then heated at 300oC for 2h. XRD analysis found that LLZTO300C40P remains crystallized in a single cubic with ionic conductivity of (3.02 0.53) x 10-5 Scm-1, which is higher than another result in Al doped-LLZO by CSP uniaxial pressing and with moistened-solvent (wet-CSP). The feasibility was tested by preparing a coin cell with a LiCoO2 cathode and Li metal anode. Cyclic voltammogram of the LCO-LLZTO300C40P-Li ASSB provides a high current density representing a higher electrochemical reaction rate inside the full cell. The battery ran well with an initial charging capacity of 88 mAh/g, and a discharge capacity of 50 mAh/g, providing 56.8 % Coulombic Efficiency. An interface engineering between electrode-solid electrolyte is essential to develop the ASSB performance.
The Influencing Factors of Access and Control Men and Women in Community Forest Resources Management Rahmawati, Fitria; Abdulkadir-Sunito, Melani
Sodality: Jurnal Sosiologi Pedesaan Vol. 1 No. 3 (2013): Sodality: Jurnal Sosiologi Pedesaan
Publisher : Departement of Communication and Community Development Sciences, Faculty of Human Ecology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (307.805 KB) | DOI: 10.22500/sodality.v1i3.9404

Abstract

Tujuan penelitian ini yaitu mendeskripsikan  profil aktivitas laki-laki dan perempuan pada kegiatan reproduktif, produktif dan sosial kemasyarakatan, mendeskripsikan profil akses dan kontrol laki-laki dan perempuan dalam pengelolaan sumberdaya hutan rakyat, membandingkan faktor-faktor yang berpengaruh terhadap akses dan kontrol laki-laki dan perempuan dalam pengelolaan sumberdaya hutan rakyat. Responden adalah petani rumah tangga dan buruh tani yang bekerja di hutan rakyat. Penelitian ini mengindikasikan bahwa dalam  kegiatan reproduktif, perempuan pada rumahtangga buruh tani memiliki curahan waktu lebih tinggi daripada perempuan pada rumah tangga petani dan dalam kegiata produktif laki-laki pada rumahtangga buruh tani memiliki curahan waktu lebih tinggi daripada laki-laki pada rumahtangga petani. Faktor penguasaan lahan rumahtangga,  keikutsertaan suami-istri dalam kegiatan kelompok dan pengetahuan lokal suami istri dalam budidaya tanaman di lahan hutan mempengaruhi akses kontrol pada rumahtangga petani terlebih pada laki-laki sedangkan pada rumahtangga buruh tani faktor-faktor tersebut tidak mempengaruhi akses dan kontrol atas sumberdaya dalam kegiatan pengelolaan hutan rakyat.  Kata kunci : akses dan kontrol, pengelolaan hutan rakyat, rumahtangga buruh tani, rumahtangga petani, gender, laki-laki dan perempuan.
Green tea (Camellia sinensis L.) potential to liver of hyperuricemia rats (Rattus norvegicus) fed with high purine diet NUGRAHENI, PUTRANTY WIDHA; MAHDI, CHANIF; RAHMAWATI, FITRIA; ANALITA, RIZKI NUR
Jurnal Natural Volume 24 Number 3, October 2024
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v24i3.29599

Abstract

Uric acid is produced in tissues containing xanthine oxidases, like the small intestine and liver, as involved in the purine metabolism of adenine and guanine. High uric acid levels cause damage to cell membranes due to the lipid peroxidase chain reaction. Foods containing high purines will activate the xanthine oxidase (XOD), causing an increase in free radicals. Free radicals attack polyunsaturated fatty acids (PUFA) by forming lipid peroxides. PUFA molecules contain multiple double bonds, which make them susceptible to oxidation by reactive oxygen species (ROS), such as free radicals. PUFA will be broken into simple compounds such as pentane, ethane, and aldehydes, leading to malondialdehyde (MDA) formation. High MDA levels illustrate the process of cell membrane oxidation leading to cell membrane damage. Hyperuricemia is often treated using synthetic drugs such as allopurinol; however, it can cause side effects. Some people will choose medicinal plants with minimal side effects. Green tea (Camellia sinensis L.) contains many polyphenol antioxidants, especially flavonoids, which also have a strong antioxidant effect by exerting multiple mechanisms such as inhibiting several enzymes, including antiphospholipid peroxidase, free radical scavengers, metal bonds, and xanthine oxidase (XOD). Statistical analysis results proved that green tea with a dose of 600 mg/kg BW could decrease the level of MDA in the liver by 84.87% (p 0.01) and reduce the activity of XOD by 35.36% (p 0.01). Taken together, green tea can improve liver histopathology.
The Legal Consequences of Nominee Arrangements under the Basic Agrarian Law and Supreme Court Circular Number 10 of 2020, along with the Roles of Notary in Minimizing the Creation of Nominee Arrangement Deeds Rahmawati, Fitria; Sudarwanto, Albertus Sentot; Karjoko, Lego
POLICY, LAW, NOTARY AND REGULATORY ISSUES Vol. 4 No. 1 (2025): JANUARY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/polri.v4i1.1557

Abstract

This study examines the differences in the legal consequences of nominee arrangement in the Basic Law of Agaria and the Supreme Court Circular Number 10 of 2020 which will be viewed from the perspective of certainty and justice. The deed of nominee arrangement cannot be separated from the notary since only a notary can formulate it in the form of an authentic deed, so the author also examines the notary's role in minimizing the making of a deed of nominee arrangement. This research is normative and evaluative and uses primary and secondary legal materials. The technique of collecting legal materials uses the library study technique, and the technique of analyzing legal materials uses the deductive syllogism method. The study results show that the Basic Law of Agaria provides more justice and legal certainty than the Supreme Court Circular, so the rules on nominee arrangement in the Supreme Court Circular shouldn’t be enforced. The role of notary in minimizing the rampant nominee arrangement cannot be separated from the support and role of the Notary Supervisory Board to guide a preventive and repressive effort to strengthen a notary's morals and integrity patterns. Furthermore, this writing hopes that the Supreme Court revokes the rules relating to nominee arrangement. Another hope is that notary can actively prioritize their moral integrity to provide legal counseling and reject the creation of deeds containing nominee arrangement.
The Implementation of Cambridge Curriculum in the Excellent Class of MTsN 3 Jombang Shobikah, Nanik; Syafri, Mohamad; Sofia, Iva; Mahsus, Mahsus; Rahmawati, Fitria; Maisaroh, Ummi; Yuni, Prima Novia
Edulingua: Jurnal Linguistiks Terapan dan Pendidikan Bahasa Inggris Vol 11, No 1 (2024)
Publisher : Universitas Islam Nahdlatul Ulama Jepara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34001/edulingua.v11i1.5718

Abstract

English Language Learning in Excellent Class of MTsN 3 Jombang is integrated with the Cambridge Curriculum and it is one of the leading programs in MTsN 3 Jombang to Go International. This qualitative descriptive research used purposive sampling techniques. The subjects in this study were the Head of the Madrasah, the Vice of curriculum, the Head of the Excellent Class Program, and the English Teacher Excellent Class. Data collection is carried out by carrying out observations, interviews, and documentation. Data analysis is carried out by data reduction, data display, and conclusions. The validity of the data is checked by triangulation and member check. The findings in this article are 1) Learning Planning aims to prepare learners to compete at local, national, and international levels; 2) Learning implementation is carried out intensively for 3 months in Grades VII-IX to equip students and develop optimally English using the Cambridge Curriculum; and 3) Learning Evaluation consists of written tests, oral tests, and practice tests.
INTEREST AND IMPLEMENTATION: PROBING THE AUDIO-VISUAL MEDIA INTEGRATION OF SENIOR HIGH SCHOOL ENGLISH TEACHERS Rahmawati, Fitria
Epigram Vol 21 No 01 (2024): Volume 21 No. 01 Tahun 2024
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/epi.v21i01.6666

Abstract

Audio-visual media are among the most common media teachers use in English instructional process. Audio-visual media are tools used to deliver information with both audio and visual components. As it possesses both characteristics, this type of media has much potential. The purposes of this study were to (1) identify the level of senior high school (SHS) English teachers’ interest in using audio-visual media to teach the English language and (2) explore the implementation of audio-visual media by SHS English teachers. This study was conducted using a quantitative approach adopting the survey design. The data were collected using a questionnaire. The respondents of this study were English senior high school teachers in one region of Central Java, Indonesia. A total of 65 teachers participated in this study, consisting of 24 (36.9%) male teachers and 41 (63.1%) female teachers. The results of this study showed that the teachers taught using audio-visual media. The result found that the SHS teachers had a “high interest” towards the use of audio-visual media to teach the English language, with a mean score of 3.38 of the total indicators of 4.00 and a standard deviation of .31. In addition, the use of audio-visual media in teaching the English language by SHS teachers is responded “meet expectation” with a mean score of 3.06 of the total indicators 4.00 and standard deviation .28. Through the calculation of EFA (Exploratory Factor Analysis), this study discovered three components regarding the implementation of audio-visual media, namely delivery, teacher role, and development. Thus, this study discovered that SHS English teachers have been able to use audio-visual media appropriately and acceptably.
Co-Authors -, Patiha Abu Masykur Agustin Widyowati Alaih, Imam Shofid Albertus Sentot Sudarwanto, Albertus Sentot Aryanthi, G. Ayu Atmoko, Setyo Bagus Swandito, Paulus Belinda, Fathya Bintang Junita Siagian, Bintang Junita Byba Melda Suhita Chanif Mahdi Chintya Dewi, Chintya Dwi Nugrahaningtyas, Khoirina Eddy Heraldy Edi Pramono Fadlulloh, Zaki Handaka, Muhammad F. A. Heliani, Kinkind Raras I F Nurcahyo, I F Indah Rizki Fitriani, Indah Rizki Ivandini Tribidasari Anggraningrum Kardi, Soeparman Khoirina Dwi Nugrahaningtyas Lego Karjoko Mahsus, Mahsus Maisaroh, Ummi Mawasthi, Wanodya Anggit Mohamad Syafri Muzayanha, Soraya U. N Ita Aryunani, N Ita Nilasary, Hanida Noffaisah B. Pasandalan, Sittie Nugraha, Harun Noor Rochman Nugraheni, Putranty Widha Nur Aini NUR FADILAH Nurcahyo, I. F. Nurcahyo, I.F. Nursukatmo, Hartoto Oktaviano, Haryo S. Paramartha, I Gusti Ayu Filia Pranoto . Puspitasari, Noviana Putri, Denis Octareta Amelia Qurrotul'aini, Nisriina 'Abidah Raihan, Edo Ratna Pertiwi, Dewanti Ridwan, Qanita Rizki Nur Analita Rochmi I. Apriyani, Rochmi I. Rosalin, Azka W Safinatunnajah, Salwa Saputri, Dini Deviana Sentot B. Rahardjo, Sentot B. Setiani, Ajeng Wahyu Shobikah, Nanik Sofia, Iva Sorohiti, Maryam Trianingsih Eni Lestari Trise Nurul Ain Utari, Marisa Putri W.W, Soegimin Widiasih Wijayanta, Agung Tri Yuni, Prima Novia Yuniawan Hidayat Zalfa, Syafira Nur