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All Journal Jurnal Teknologi Industri Pertanian Transmisi: Jurnal Ilmiah Teknik Elektro SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI TRANSIENT: Jurnal Ilmiah Teknik Elektro Indonesian Journal of Chemistry Akta Kimia Indonesia Studies in Philosophy of Science and Education Education Achievement: Journal of Science and Research Greensphere: Journal of Environmental Chemistry International Journal of Multidisciplinary Sciences JURNAL REKAYASA KIMIA & LINGKUNGAN
Sriatun Sriatun
Chemistry Department, Faculty Of Sciences And Mathematics, Diponegoro University Jl. Prof. Soedarto, SH., Tembalang, Semarang
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Other

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The Use of Javanese Phonology in The Mountainous Region of Batang Regency: A Socio-Dialectological Study Sriatun, Sriatun; Winarti, Daru; Salahuddin, Salahuddin
International Journal of Multidisciplinary Sciences Vol. 3 No. 3 (2025)
Publisher : Jayapangus Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37329/ijms.v3i3.3929

Abstract

This article discusses the phonological and lexical variations of the Javanese language in Batang Regency, focusing on the geographic dialect framework. Using a dialectological approach, particularly within the framework of geographic dialect theory, this article analyzes the phonological variations of Javanese, including local sound variations, consonants, vowel and consonant sound correspondences, and the patterns of syllables formed. The research data consists of oral Javanese speech used by native speakers and residents of Bawang Subdistrict in Batang Regency. Based on data analysis, phonological variations were identified, including sound changes and syllable patterns. Sound changes included free variations such as vowel sound changes in the first syllable, vowel sound changes in the second syllable, vowel sound changes in both the first and second syllables, consonant replacement in the first syllable, and consonant replacement in the second syllable. Additional sounds were observed, including prosthesis and paragogee. Sound reductions, including apheresis and syncope, as well as sound shifts, were also found. Seven syllable patterns were identified, including V, VK, KVK, KKV, KKVK, KKKV, and KKKVK. These phonological variation data are then presented on a language map. Geographic factors are identified as the causes of Javanese language variations in Batang Regency.
Effect of Activator Type on Activated Carbon Characters from Teak Wood and The Bleaching Test for Waste Cooking Oil Sriatun, Sriatun; Herawati, Shabrina; Aisyah, Icha
Jurnal Rekayasa Kimia & Lingkungan Vol 15, No 2 (2020): Jurnal Rekayasa Kimia & Lingkungan (December, 2020)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v15i2.14788

Abstract

The starting material for activated carbon was biomass from teak woodcutting, which consists of 47.5% cellulose, 14.4% hemicellulose, and 29.9% lignin. The surface area and iodine number of activated carbons are the factors determining the adsorption ability. This study aims to determine the effect of the activator type on activated carbon characters and test the absorption ability for waste cooking oil. The synthesis stages include carbonization, chemical activation, and then physics activation. The activation process consists of two steps. Firstly, the chemical activation via adding H2SO4, and H3PO4 at room temperature for 24 hours, the second, physical activation by heating at various temperatures of 300, 400, and 500 C for two hours. The characterizations of activated carbon include water content, ash content, iodine number, functional groups, and surface area. Furthermore, the activated carbon was used as an adsorbent for waste cooking oil for 60 minutes at 100 C with a stirring of 500 rpm. The results were analyzed using UV-Vis spectrophotometry at a maximum wavelength of 403 nm. The iodine numbers of activated carbon ranged 481.1-1211.4 mg/g and 494.8-1204 mg/g for H3PO4 and H2SO4, respectively.Activated carbon with H3PO4 of 15% and an activation temperature of 400 C has the highest surface area of 445.30 m2/g. The H2SO4 dan H3PO4 activators can be used to improve the quality of activated carbon in absorbing dyes in waste cooking oil, where the optimum concentration is 10-15% (v/v). The H3PO4 activator tends to produce a higher bleaching percentage than H2SO4.
The Essence of Education Sriatun, Sriatun; Sugiono, Sugiono; Kurniasih, Nanda Bella; Hendrizal, Hendrizal
Education Achievement: Journal of Science and Research Volume 5 Issue 2 July 2024
Publisher : Pusdikra-Publishing.com

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51178/jsr.v5i2.1910

Abstract

Education is a complex and integral process in the formation of individuals and society. This research aims to explore the nature of education as a phenomenon that goes beyond the mere transfer of knowledge and skills, but also involves aspects such as character formation, development of critical abilities, and preparation for life in society. Through a comprehensive literature review, this research investigates various perspectives and concepts about the nature of education that have been proposed by leading educational experts and thinkers. The results of the analysis highlight the importance of education as a tool to facilitate the holistic growth of individuals, promote social inclusion, and build the foundation for sustainable development. These findings make an important contribution to our understanding of the important role of education in shaping a better future for society as a whole.
Sintesis Komposit Zeolit/Magnetit dan Penggunaannya sebagai Adsorben Ion Cu (II) daan Co (II) Sriatun, Sriatun; Hakim, U. Khairunnisa; Suhartana, Suhartana
Greensphere: Journal of Environmental Chemistry Vol 5, No 2 (2025): Volume 5 Nomor 2 Tahun 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gjec.2025.29911

Abstract

Zeolit alam dapat dimodifikasi untuk memperbaiki sifat fisika dan sifat kimianya. Salah satu modifikasi yang dapat dilakukan adalah dengan memberi sifat kemagnetan. Modifikasi zeolit dengan sifat kemagnetan dapat dilakukakan melalui pembentukan komposit magnetit dan zeolit menggunakan PEG 6000 sebagai perekat. Tujuan penelitian ini untuk mendapatkan komposit zeolit/magnetit untuk adsorben ion logam Cu(II) dan Co(II). Karakterisasi material komposit menggunakan XRD (X-Ray Diffraction) dan AAS (Atomic Absorption Spectroscopy) untuk mengetahui kemampuan adsorpsi komposit. Hasil karakterisasi XRD menunjukkan sebagian besar komponen besi oksida adalah magnetit, data XRD juga menunjukkan perlakuan kalsinasi menyebabkan perubahan fasa dari magnetit menjadi hematit dan maghemit, sedamgkan XRD komposit menunjukkan keberadaan mineral magnetit dan zeolit. Pada rentang waktu 1-60 menit,  kemampuan adsorpsi komposit magnetit/zeolit terhadap ion logam Co(II) sebesar 96,26%  sedangkan untuk Cu(II)sebesar 77,21%. Kemampuan adsorpsi komposit meningkat seiring dengan meningkatnya konsentrasi adsorbat (ion logam) dimana pada konsentrasi 500 ppm adsorpsinya sebesar 98,24% untuk Co(II) dan 90,14% untuk Cu(II).
Co-Authors . Widayat Abdul Haris Adi Darmawan Agi Yulianti Agus Salim Purwanto Agustina L.N. Aminin Aisyah, Icha Alfi Nurlaela Amaryllis Kartika Ratri Anis Komariah Anistyasari, Yeni Arnelli Arnelli Bimo Tunggal Dipowardani Choiril Azmiyawati Damar Nurwahyu Bima Daru Winarti, Daru Dharma Pebruariawan Putra Didik S. W. Dimas Buntarto Ekohariadi Endah Wulan Juni Erwin Nur Cahyo Febriani, Intan Wahyu Fuguh Devi Saputro Hakim, U. Khairunnisa Hanifa Zakiyatul Urbach Hendrizal Hendrizal Herawati, Shabrina Heru Susanto Icha Aisyah Isharyanti, Isharyanti Janitra, Atikah Ayu Karso Karso Khairini Pertiwi Kurniasih, Nanda Bella Kuwatno Kuwatno Linda Selvianingrum Linda Suyati Madania, Pawitra Marta Chandra Anikke Putri Meini Sondang Sumbawati Muchamad Fadlulah Mukhammad Asy'ari Nasution, Ali Napiah Nor Aida Zubir Novia Mintari Nurul Fauziyah, Nurul Oktaffi Arina Manasikana Pardoyo Pardoyo Reny Ingemer Selvia Rina Nurianingsih Salahuddin Salahuddin Saphira, Hanandita Veda Shabrina Herawati Sholihah Novitasari Sofian Ansori Sri Hartutik Sugiono Sugiono Suhartana Suhartana Sumardi . Taslimah Taslimah Taslimah Taslimah Taslimah Taslimah Wuryanti Wuryanti Yanti Sri Rejeki