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All Journal HAYATI Journal of Biosciences JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Penelitian Saintek INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni Jurnal Pendidikan Matematika dan IPA Jurnal Sains Dasar Jurnal Matematika & Sains Journal of Degraded and Mining Lands Management Jurnal Pendidikan Biologi Indonesia JPS Unimus Jurnal Inovasi Pendidikan IPA Jurnal Edukasi Matematika dan Sains Indonesian Journal of Science and Technology Jurnal Tadris Kimiya Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Jurnal Ilmiah Peuradeun Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Faletehan Health Journal Molekul: Jurnal Ilmiah Kimia JKPK (Jurnal Kimia dan Pendidikan Kimia) Chemistry Education Practice Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Borobudur Journal Evaluation in Education (JEE) Jurnal Keperawatan 'Aisyiyah Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Molekul: Jurnal Ilmiah Kimia Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia IJOBI Holistik Jurnal Kesehatan Jurnal Pendidikan MIPA Indonesian Journal of Science and Education Warta Penelitian Perhubungan IJIS Edu : Indonesian Journal of Integrated Science Education

SRI ATUN

Universitas Negeri Yogyakarta

Author-ID : 236697

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Health Professions Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Transportation Other

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TEST ACTIVITIES SOME COMPOUNDS OLIGORESVERATROL RESULT OF INSULATION OF SKIN HOPEA ODORATA PLANT AS PREVENT 2-DEOKSIRIBOSE DEGRADATION Sri Atun
Jurnal Penelitian Saintek Vol 13, No 1: April 2008
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objective of the study were measured inhibitory of 2-deoxyribose degradation activity of balanocarpol (1), ampelopsin H (2), hopheaphenol (3), and hemlesyanol C (4) which are resveratrol compounds from isolation of stem bark of Hopea odorata, and to study of different activity as 2-deoxyribose degradation activity from this compounds. Methods of this study to measured 2-deoxyribose degradation activity test with Fenton reaction method. Activity of 2-deoxyribose degradation activity calculated as percentage absorbansi decreased sample with bioactive compounds compared with a blank. As positif control used vitamin C and BHT (Butylated Hydroxy Toluena). The result of this study showed activity each compounds as 2-deoxyribose degradation activity of balanocarpol (1), ampelopsin H (2), hopheaphenol (3), and hemlesyanol C (4) with an IC50 1802,3; 4840,0; 61,8 and 425,5 mg/ml respectively. Hopeaphenol (3) showed more active than vitamin C (IC50 83,9 mg/ml) and BHT (1328,1mg/ml)

MODIFICATION POLISAKARIDA GALAKTOSA SULPHATE EXTRACTION EXPORT FROM GRACILARIA SP (ALGA MERAH) WITH ALKALI BOROHIDRIDA Sri Atun
Jurnal Penelitian Saintek Vol 6, No 1: Saintek 2001
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The objective of the study is to modify the sulphate galactanspolysaccharide (gelatine) provided from extraction of Gracilaria sp with borohydride alkali and its result characterization. The sample of this study was the sulphate galactans polysaccharide provided from extraction of Graci/aria sp. The modified reaction using the Rees method used NaBH4 and NaOH in various compositions. The physical and chemical characteristics of the modification reaction results were compared to the characteristics of the seaweed gelatine provided from the extraction before the treatment and agarosa p.a. The result of this study indicates that the sulphate galactans polysaccharide can be modified by borohidrida alkali reagent in base condition at the composition variations of the seaweed gelatine: NaBH4 : NaOH = 1: 0,5 : ] ; 1 : 1 : 2 and 1: 2 : 4 .The characterization showed that the compound of the modification reaction result compared to the sulphate galactans polysaccharide before the treatment indicated the change of their physical and chemical characteristics. The characteristics of the compound resulted from modification reaction of sulphate galactans polysaccharide at the composition variations of the seaweed gelatine: NaBH4 : NaOH = 1 : 1 : 2 and 1 : 2 : 4 were almost similar to the characteristics of agarosa p. a.

SEPARATION AND ELEMENTATION OF DIMER STILBENOID STRUCTURE OF VATICA LIGHT STEEL UMBONATA BURCK (DIPTEROCARPACEAE) Sri Atun
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Three oligostilbenoid, namely (-)-ampelopsin F (1), laevifonol (2), ande-viniferin (3) had been isolated and elucidated these structure from the stem bark of Vatica umbonata Burck (Dipterocarpaceae). The structure of three compounds were elucidated based on physical and spectroscopic data UV,JR, IH and HCNMR, HMBC, HMQC, COSY, andNOESY.

THE UTILIZATION OF GLYCEROL, BIODIESEL SIDE PRODUCT OF USED COOKING OIL AS GLYCEROL ACETATE MATERIAL SYNTHESIS Nelly Fadliyani; Sri Atun
Jurnal Penelitian Saintek Vol 20, No 2: Oktober 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

The research aimed at using glycerol of biodiesel synthesis side product from used cooking oil as glycerol acetate material synthesis, and charactering synthesized material based on data of IR spectroscopy and GCMS. The method used to synthesize glycerol acetate was reﬂ ux during 50 minute at 80 C. Glycerol from biodiesel synthesis side product from used cooking oil was puriﬁ ed with acetic anhydride reacted at 80 0C, for 50 minutes. The synthesis product was characterized by IR and GCMS spectroscopies. The result of this research shows that glycerol derived from synthesizing glycerol 1–monoacetate and glycerol 2-monoacetate in the form of yellow liquid with 145 148 0 0 C boiling point, soluble in ethanol and insoluble in n-hexane. IR spectrum shows the presence of C=O carbonyl, C-O ester, -OH, and C-H aliphatic group; GCMS spectrum shows a mixture from two glycerol monoacetate with SI (Similiar Index) of 97 and 93.

Pengembangan LKS IPA untuk Meningkatkan Ketrampilan Proses Sains Dan Kemampuan Berpikir Kritis Siswa SMP Abas Susilo; Sri Atun
JEMS: Jurnal Edukasi Matematika dan Sains Vol 5, No 1 (2017)
Publisher : Universitas PGRI Madiun

Penelitian ini bertujuan untuk mengungkapkan: (1) kelayakan dan (2) keefektifan LKS IPA dengan pendekatan guided inquiry untuk meningkatkan ketrampilan proses sains dan kemampuan berpikir kritis siswa SMP kelas VII. Prosedur pengembangan mengacu langkah-langkah dari Borg & Gall yang meliputi studi pendahuluan, perencanaan, pengembangan draf, validasi dan revisi, uji coba terbatas dan revisi, uji coba lapangan dan penyempurnaan produk, dan diseminasi. Hasil penelitian adalah sebagai berikut. (1) LKS IPA dengan pendekatan guided inquiry dengan kelayakan menurut penilaian ahli nilai rata-rata sebesar 4,16 dengan kategori “Baik”, dan guru serta teman sejawat nilai rata-rata ≥ 4,2 dengan kategori “Sangat Baik”. LKS IPA dengan pendekatan guided inquiry mampu meningkatkan ketrampilan proses sains, kemampuan berpikir kritis, dan hasil belajar kognitis siswa SMP kelas VII.

PENGEMBANGAN PERANGKAT PEMBELAJARAN MENGGUNAKAN PENDEKATAN TPACK UNTUK MENINGKATKAN LITERASI SAINS Luthfia Ulva Irmita; Sri Atun
Jurnal Tadris Kimiya Vol 2, No 1 (2017)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jta.v2i1.1363

Penelitian ini bertujuan untuk mengembangkan perangkat pembelajaran menggunakan pendekatan TPACK (Technological Pedagogical and Content Knowledge) untuk meningkatkan literasi sains siswa. Perangkat pembelajaran berupa Rencana Pelaksanaan Pembelajaran (RPP) dan Lembar Kerja Siswa (LKS) pembelajaran. Metode penelitian ini adalah Research and Development yang terdiri dari tiga tahap yaitu pendefinisian, perancangan dan pengembangan. Pada tahap pendefinisian dilakukan persiapan studi awal. Pada tahap perancangan dilakukan untuk menentukan indikator, tujuan pembelajaran dan analisis materi laju reaksi. Pada tahan pengembangan dilakukan pengembangan langkah-langkah kegiatan pembelajaran pada RPP dengan menggunakan pendekatan TPACK dan model discovery learning serta LKS pembelajaran yang akan diuji kelayakannya oleh dua orang dosen validator dan dua orang guru kimia Sekolah Menengah Atas (SMA). RPP dan LKS pembelajaran dikembangkan untuk meningkatkan literasi sains yang mencakup ketiga aspek yaitu aspek konteks sains, konten sains dan proses sains. Hasil uji kelayakan menunjukkan bahwa perangkat pembelajaran dikatakan memiliki kelayakan yang baik dengan rata-rata skor untuk RPP yaitu 49,75 dan untuk LKS pembelajaran yaitu 43,5. Selain itu, uji kelayakan dengan menggunakan Aiken’s V perangkat pembelajaran dikatakan memiliki validitas yang tinggi dengan rata-rata nilai Aiken’s V yaitu 0,675. Dengan demikian, perangkat pembelajaran menggunakan pendekatan TPACK dengan model discovery learning dapat digunakan khususnya pada materi laju reaksi kimia.

Pengembangan Media Laboratorium Virtual Berbasis Inkuiri Materi Larutan Elektrolit dan Non-Elektrolit Tia Rachmatika Wahyuni; Sri Atun
Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Vol 4, No 5: MEI 2019
Publisher : Graduate School of Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/jptpp.v4i5.12472

Abstract: This research aims to reveal the characteristics and quality of virtual chemistry laboratory based inquiry on electrolyte and non-electrolyte solution materials. The development procedure adapted the Borg and Gall model. Development is done through seven stages of information collecting planning, develop preliminary form of product, preliminary field testing, main product revision, main field testing, and operational product revision. The results of the research media software can be operated in Windows devices with virtual practicum and media products are very good quality based on material expert validation, peer reviewers, chemistry educator, learners, and have Good quality based on the validation of media experts, so it deserves to be used as a learning medium.Abstrak: Penelitian ini bertujuan untuk mengungkap karakteristik dan kualitas media laboratorium virtual berbasis inkuiri materi larutan elektrolit dan non-elektrolit. Prosedur pengembangan mengadaptasi model pengembangan Borg and Gall. Pengembangan dilakukan melalui tujuh tahapan yaitu pengumpulan data, perencanaan, pengembangan draft produk, uji coba lapangan awal, penyempurnaan hasil uji coba, uji coba lapangan, dan penyempurnaan produk hasil uji coba. Hasil penelitian yaitu software media dapat dioperasikan dalam perangkat Windows dengan praktikum secara virtual dan media memiliki kualitas sangat baik berdasarkan validasi ahli materi, peer reviewers, pendidik kimia, peserta didik, serta memiliki kualitas baik berdasarkan validasi ahli media, sehingga layak untuk digunakan sebagai media pembelajaran.

LEMBAR KERJA PESERTA DIDIK (LKPD) INDUSTRI KECIL KIMIA BERORIENTASI KEWIRAUSAHAAN UNTUK MENINGKATKAN LIFE SKILLS Artina Diniaty; Sri Atun
JURNAL PENDIDIKAN SAINS UNIVERSITAS MUHAMMADIYAH SEMARANG Vol 3, No 2 (2015): JURNAL PENDIDIKAN SAINS (JPS)
Publisher : Pendidikan Kimia Unimus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jps.3.2.2015.56-63

Penelitian ini bertujuan untukmengetahui pengaruh penggunaan LKPD untuk meningkatkanlifeskills.Prosedur dalam penelitian ini terdiri dari empat tahap, yaitu tahap pendahuluan.perencanaan, ujicoba. Subjek uji coba adalah peserta didik kelas XI SMK N 1 Panjatan, yang terdiri dari kelas kontroldan kelas eksperimen. Desain uji coba menggunakan nonequivalent control group design. Instrumenpengumpulan data yang digunakan adalah lembar observasi life skills.Hasil penelitian menunjukkanbahwa penggunaan LKPD industri kecil kimia berorientasi kewirausahaan dapat meningkatkan lifeskills peserta didik.Kata Kunci: LKPD, kewirausahaan, life skills

Metode Isolasi dan Identifikasi Struktural Senyawa Organik Bahan Alam Sri Atun
Borobudur Vol. 8 No. 2 (2014): Jurnal Konservasi Cagar Budaya Borobudur
Publisher : Balai Konservasi Borobudur Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33374/jurnalkonservasicagarbudaya.v8i2.132

Beberapa penelitian etnomedika yang tercatat dalam dokumen kuno dari beberapa wilayah Indonesia menunjukkan adanya beberapa jenis tumbuhan yang dapat digunakan sebagai obat untuk menyembuhkan berbagai penyakit, maupun dapat diterapkan pada benda yang mengalami permasalahan akibat aktivitas suatu organisme. Senyawa bioaktif dapat berkhasiat sebagai anti bakteri, anti jamur, anti serangga dan lain-lain. Namun demikian, agar tumbuhan tersebut dapat dikembangkan dan dilestarikan perlu dilakukan penelitian yang berkelanjutan, sehingga dapat diketahui jenis senyawa bioaktifnya. Untuk mengetahui kandungan senyawa aktif dari tumbuhan perlu dilakukan isolasi, sehingga diperoleh senyawa murni. Selanjutnya dari senyawa murni yang diperoleh belum memiliki makna apabila belum diketahui struktur molekulnya. Dalam artikel ini akan dibahas mengenai metode isolasi dan penentuan struktur senyawa alam.

Characterization of Curcuminoid from Curcuma xanthorrhiza and Its Activity Test as Antioxidant and Antibacterial Sri Atun; Nurfina Aznam; Retno Arianingrum; Senam Senam; Bian Ihda An Naila; Astuti Lestari; Nur Aini Purnamaningsih
Molekul Vol 15, No 2 (2020)
Publisher : Universitas Jenderal Soedirman

Curcuminoids are the main component found in many Zingiberaceae family plants. The aim of this study was to characterize curcuminoid and its activity test as an antioxidant and antibacterial. Dryed powder of C. xanthorrhiza (1 kg) was macerated with ethanol for 24 hours at room temperature. Ethanol extract of C. xanthorrhiza was subsequently fractionated with n-hexane and chloroform to take the yellow or orange indicated contain of curcuminoids. Analysis of total phenolic levels was carried out by the Follin-Ciaocalteau method. The isolation of curcuminoid componens from this fraction was carried out by chromatographic method and the structure elucidation was performed by interpretation of spectroscopic data, including UV, IR, 1H and 13C NMR 1D and 2D. The antioxidant activity test used the DPPH (2,2-diphenylpicrylhydrazyl) method, while the antibacterial activity test used Kirby Bauer test diffusion method. The results showed that the curcuminoid fraction yield was 10.06% from ethanol extract C. xanthorrhiza. The total phenolic content of curcuminoids fraction was 745.45 ± 18.5 mg galic acid (GA)/g extract. Curcuminoids fraction was isolated a known compound desmethoxycurcumin (1). The content of demethoxycurcumin (1) in curcuminoid fraction is 20.97 %.The antioxidant activity of curcuminoids fraction showed strongest activity with IC50 24.98 µg/ml. Antibacterial activity against of the four pathogenic bacteria showed medium activity. The study suggests that curcuminoids extract from C. xanthorrhiza rhizome have potential compounds could be suitable for antioxidant and the treatment of various infections caused of microbial.

Co-Authors Abas Susilo Ade Sofiana Suryani Agusta, Fauji Alfin, Riandi Althaaf, Nabila Tsabita Alya Rizkita Irwan Aminatun, Tien Ana Siti Nurjanah Anak Agung Gede Sugianthara Anisa Nur Khakim Anna Rakhmawati Anugrah Anang Respati Apriani, Nuni Arifudin Idrus Arthamena, Vegha Dwi Artina Diniaty Artina Diniaty, Artina Astuti Lestari Ayubi, Mizzan Azeeza, Sabira Nurul Azizah, Fidasari Nur Bian Ihda An Naila Buhera, Rusdiman Darmono Dessy Kurniasari Dewi ANGGRAENI Dewi Anggraini Elmi Royani Emilio L Ghisalberti Erlina Erlina Euis Holisotan Hakim Fajar Naqsyahbandi Fapriyan Wijoyo Mulyopratikno Fauji Agusta Ghabby Maharani P Habibatul Unayah Hadibah Kalor Heru Kuswanto Hurrahman, Mifta Ika Rosdiani Indah Puspita Sari, Mega Insih Wilujeng Jumaiyah, Wati Kamari, Azlan Kasyfi Rifqi Mouromadhoni Laila, Erni Latifah Kurnia Devani Lia Dewi Juliawaty Luthfi Fitri Frindryani Luthfia Ulva Irmita M. Agung Satriya Maemonah, Maemonah Mamluaturrahmatika, Annisa Marpaung, Aisyatur Radhwa Masatake Niwa Mizzan Ayubi Mouromadhoni, Kasyfi Rifqi muhamad arif nur rokhman Muhamad Sarip Muhammad Ikhsan Muhammad Ikhsan Mukti Syarifah Mulyopratikno, Fapriyan Wijoyo Nadiya Fitri Anisa Nafakoti, Nadia Naffa Afkarina Izzata Dini Naqsyahbandi, Fajar Nelly Fadliyani Ni Putu Laksmi Cintya Dewi, Ni Putu Laksmi Cintya Nida Qurbaniah Juhara Niwa Masatake Nova Irawati Simatupang Nova Irawati Simatupang, Nova Irawati Nurfina Aznam Oky Pamungkas Pamungkas, Oky Patar Ariyanto Sitorus Purnamaningsih, Nur Aini Putri, Sarmila Eka Rahman, Nanang Rania Nur Farida Ratri Panggih Pangastuti Rayasari, Fitrian Retno Arianingrum RISHA KURNIA DWI HARTANTI Romadhoni, Siti Dzakiya Rusdiman Buhera S. Senam Sa'adah, Siti Imroatus Sabar Nurohman Sabar Nurohman Sangal, Aditi Sari, Winda Putri Permata Sarip, Muhamad Senam Senam Simbolon, Doly siswanti ningsih Siti Aisyah SITI NUR'AINI Sitorus, Patar Ariyanto Sjamsul Arifin Achmad Sogen, Jasintah Tagan Sujangka, Arsyad Suryadi Prasetyo Susila Kristianingrum Suyanta Suyanta Tia Rachmatika Wahyuni Unayah, Habibatul Vegha Dwi Arthamena Wijoyo Mulyopratikno, Fapriyan Yana Maolana Syah Yani Sofiani Yasaroh, Sabila Yunitri, Ninik

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