Edy Cahyono
Jurusan Kimia FMIPA Universitas Negeri Semarang Gedung D6 Lantai 2 Kampus Sekaran Gunungpati Semarang, 50229, Telp. (024)8508035

Published : 60 Documents
Articles

MINIMALISASI MISKONSEPSI KONSEP PH PADA MATERI HIDROLISIS GARAM DAN LARUTAN PENYANGGA DENGAN EKSPERIMEN BERBASIS MASALAH Haryani, Sri; Listanti, Dian; Cahyono, Edy
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2017: Prosiding Seminar Nasional Pendidikan, Sains dan Teknologi
Publisher : Universitas Muhammadiyah Semarang

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This study aims to determine the application of Problem-Based Learning methods to minimizing student?s misconception on determination of pH of acidbasemixture solution. The populations of this study were XI MIPA 4, 5, and 6SMA N 1 Juwana. The sampling technique used is Purposive Random Sampling.Samples are treated differently and then followed by postest. The statistical testsused are normality test, two variance equations, hypothesis, and misconceptionlevel analysis. Average grade of experimental class postest is 75.77 and controlclass is 72.5. In the hypothesis test t292 test (2.44)> t (1.99) which means theaverage cognitive learning outcomes of the experimental class is better than thecontrol class. In the analysis of misconception level, the result of the experimental class postest experienced misconception of level 1 is 4.1% and level 2 is 3%, while the control class experienced misconception of level 1 is 17.5% and level 2 is 3.4%. Based on the results of the research can be concluded that the application of experiment-based learning problem able to minimize student misconception on salt hydrolysis and buffer solution. Keywords: experiment based problem, hydrolysis of salt, buffer solution,minimization, misconception.
KEJADIAN HIPERTENSI, PENINGKATAN BERAT BADAN, DAN PERUBAHAN POLA MENSTRUASI PADA PENGGUNA KONTRASEPSI SUNTIK DEPO MEDROKSI PROGESTERON ASETAT (DMPA) -, Machmudah; Cahyono, Edy; Bintanah, Sufiati
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2012: PROCEEDING SEMINAR NASIONAL KEPERAWATAN : Penggunaan Herbal Dalam Kesehatan Perempuan
Publisher : Universitas Muhammadiyah Semarang

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Latar belakang: Kontrasepsi hormonal dibagi dalam dua jenis suntikan yaitu Depomedroksiprogesteron Asetat (DMPA) yang diberikan setiap 3 (tiga) bulan dan DepoNoretisteron Enantat (Depo Noristerat) yang diberikan setiap 1 (satu) bulan dengan cara disuntik intramuscular. Masing - masing kontrasepsi hormonal memiliki keuntungan dan kerugian yang harus disesuaikan dengan penggunanya.Efek samping dari penggunaan kontrasepsi suntik antara lain gangguan haid, permasalahan berat badan, sakit kepala, hipertensi dan stroke. Tujuan: penelitian ini bertujuan untuk mengetahui hubungan kejadian hipertensi, peningkatan berat badan, dan perubahan pola menstruasi dengan lama penggunaan suntik (DMPA) pada wanita usia subur di Desa Betek Kecamatan Jati Kabupaten Blora. Metode : Penelitian ini merupakan penelitian diskriptif korelasi dengan  metode pendekatan cross sectional. Populasi dalam penelitian ini adalah semua wanita usia subur yang menggunakan kontrasepsi hormonal suntik di Desa Betek Kecamatan Jati Kabupaten Blora dan sampel yang diambil adalah seluruh populasi yaitu berjumlah 66 orang. Variabel yang dikaji dalam penelitian ini adalah kejadianhipertensi, peningkatan berat badan, perubahan pola menstruasi dan lama penggunaan kontrasepsi suntik DMPA. Analisa data yang digunakan dalam penelitian ini adalah dengan menggunakan analisis statistik Chi Square.Hasil : Berdasarkan hasil analisis statistik diperoleh sebagianbesar responden mengalami kejadian hipertensi yaitu sebanyak 37 orang (56,1%), yang mengalami peningkatan berat badan tinggi yaitu sebanyak 28 orang (42,4%), yang mengalami gangguan pola menstruasi yaitu sebanyak 40 orang (60,6%), dan yang menggunakan KB suntik selama 2-5 tahun yaitu sebanyak 30 orang (45,5%). Ada hubungan yang signifikan antara kejadianhipertensidenganlama penggunaankontrasepsi suntik DMPA, dengan nilai p-value 0,000<?(0,05), Ada hubungan yang signifikan antara peningkatanberatbadandenganlamapenggunaankontrasepsisuntik DMPA, dengan nilai p-value 0,013<?(0,05), Ada hubungan yang signifikan antara perubahan pola menstruasi denganlama penggunaan kontrasepsisuntik DMPA, dengan nilai p-value 0,002<?(0,05).Kesimpulan dan saran: Berdasarkan hasil analisis statistik tersebut makadiharapkan masyarakat atau calon akseptor sebelum memilih alat kontrasepsi hendaknya menggali informasi terlebih dahulu tentang semua alat kontrasepsi dan efek sampingnya, terutama pada akseptor yang masih dalam usia  reproduksi disarankan menggunakan kontrasepsi non hormonal karena untuk meminimalisirkan efek samping dari alat kontrasepsi.
CYCLISATION-ACETYLATION KINETIC OF (R)-(+)-CITRONELLAL BY ZN2+–NATURAL ZEOLITE AS SOLID SOLVENT CATALYST Cahyono, Edy; Muchalal, Muchalal; Triyono, Triyono; Pranowo, Harno Dwi
Indonesian Journal of Chemistry Vol 10, No 2 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.21459

Abstract

Kinetic in cyclisation-acetylation of (R)-(+)-citronellal with acetic anhydride was investigated over Zn2+-Natural zeolite (Zn2+-Natzeo) as a catalyst. (R)-(+)-citronellal has been isolated from citronella oil by fractional distillation under reducing pressure. Enantioselective capillary GC on a Supelco ?-DEX 225 column has been used for analysis the enantiomers ratio of citronellal. Catalyst Zn2+-Natzeo has prepared through acid activation of natural zeolite from Malang using HF 1% and HCl 6 M, followed by ion-exchange with 3 M NH4Cl and calcination at 450 °C for 1 h under nitrogen to obtained H-natural zeolite (H-Natzeo). H-Natzeo was modified to Zn2+-Natzeo by ion exchange with 0.1 M ZnCl2. Cyclisation-acetylation reaction was carried out by heating (R)-(+)-citronellal (CIT), acetic anhydride (AA), and 1 g catalyst in glass batch reactor with vigorous stirring at 80 °C. Molar ratio CIT/AA that used, i.e. 0.25; 0.5; 1.0; 1.2 and 1.5. As the reaction proceeded, 1 mL sample was taken off at 10; 20; 30; 60; 120; 180 min and extracted using n-hexane for every molar ratio. Structure analysis of product was conducted by GC-MS. Kinetic of the cyclisation-acetylation reaction was analyzed according to the Langmuir-Hinshelwood mechanism. Increasing molar ratio of CIT/AA will decrease the isopulegyl acetate (IPA) and neo-isopulegyl acetate (NIPA) formation. Rate constant of cyclisation-acetylation reaction catalyzed by Zn2+-Natzeo was 30.964-47.619 mmol(min. g cat)-1 at 80 °C, 30 min and the ratio  adsorption equilibrium constant KCIT/KAA was 7.09.
PENINGKATAN HASIL BELAJAR KIMIA SISWA SMA DENGAN PENUGASAN DAN PENILAIAN PORTOFOLIO -, Latifah; Cahyono, Edy; Ningsih, Ratnawati Kusuma
Jurnal Inovasi Pendidikan Kimia Vol 2, No 1 (2008): January 2008
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Hasil  belajar  kimia  siswa  kelas XI SMA Negeri Ungaran masih  rendah. Hal  ini dikarenakan siswa kesulitan memahami konsep kimia. Permasalahan dalam penelitian ini adalah apakah penugasan dan penilaian portofolio dapat meningkatkan hasil belajar kimia siswa. Penelitian ini bertujuan untuk meningkatkan hasil belajar dengan penugasan dan penilaian portofolio. Penelitian tindakan kelas ini dilaksanakan dalam tiga siklus yang terdiri atas perencanaan, pelaksanaan, pengamatan dan refl eksi. Obyek penelitian ini adalah siswa kelas XI PSIA 5 SMA Negeri 1 Ungaran. Fokus yang diteliti dalam penelitian ini adalah hasil belajar siswa. Data hasil belajar kognitif siswa diperoleh dari nilai tiap siklus sedangkan hasil belajar afektif dan psikomotorik dari hasil observasi. Hasil penelitian menunjukkan adanya peningkatan nilai kognitif, psikomotorik dan afektif dari siklus I sampai siklus III. Hasil dari penilaian portofolio diketahui nilai rata-rata kelas pada siklus I,  II, dan III masing-masing adalah 74,4, 78,6 dan 81,1 dengan ketuntasan belajar klasikal berturut-turut adalah 95%, 100% dan 100%.Kata Kunci: hasil belajar, penugasan, penilaian portofolio
REDOX REACTION IN THE CYCLIZATION-AROMATIZATION OF (R)-(+)-CITRONELLAL WITH FECL3/ACETIC ANHYDRIDE Cahyono, Edy; Muchalal, Muchalal; Pranonowo, Harno Dwi
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 11, ISSUE 2, August 2010
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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 The effects of temperature, time of reaction, and the reactants mole ratio on the cyclization-acetylation of (R)-(+)-citronellal with FeCl3/acetic anhydride were studied.  Isopulegyl acetate (IPA) and neoisopulegyl acetate (NIPA) were obtained as the main products at room temperature (mole ratio of citronellal: acetic anhydride: FeCl3 = 6:12:1). Both products are relatively fixed after the 30th minute. The average concentration of IPA at 30-180 minutes was 44.71%, while the average concentration of NIPA was 28.47%. Increasing temperature (80 oC) and the amount of acetic anhydride (mol ratio 2:6:1) gave p-cymene (17.53%) and citronellyl acetate (11.31%). Autoredoks reaction on the transformation of citronellal into p-cymene and citronellyl acetate was studied with the carbon oxidation number concept. Key words: (R )-(+)- citronellal, cyclization-aromatization, FeCl3,  p-cymene, redox
EFFECTIVENESS OF ELEMENTS PERIODIC TABLE INTERACTIVE MULTIMEDIA IN NGUYEN TAT THANH HIGH SCHOOL Astuti, Fiki Kusuma; Cahyono, Edy; Supartono, Supartono; Van, Ngoc Chau; Duong, Nguyen Thuy
International Journal of Indonesian Education and Teaching (IJIET) Vol 2, No 1 (2018)
Publisher : Sanata Dharma University Yogyakarta

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The result of observation and interview shows that the learning process in Nguyen Tat Thanh High School was going fun and everyday teacher used different method of learning, sometimes teacher also made a worksheet for students, but the power point presentation media that teacher used did not show the interaction between media, teacher and students. Also there were unnecessary pictures on the power point that could distract students focus and the colour combination was not suitable. This research aimed to develop an interactive multimedia and know its feasibility and effectiveness. This study had significance to develop an alternative instructional multimedia in an education game way so could increase students’ motivation and learning outcome. The design of this research was Research and Development with ADDIE model. The data of this research were obtained from validation result from media expert and instructional expert, students’ response at small scale test, post test result and students’ response at large scale test. The score of validation result for the media expert was 96 categorized as very feasible and for the instructional expert was 62 categorized as feasible. Small scale test result showed that students gave very good response with 69.97 score. Students’ post test gave effective result with classical completeness 61.76% and very good response with 68.5 score. It can be concluded that the elements periodic table interactive multimedia was feasible and effective to be used in learning process, and have very good response from the students as users. DOI: https://doi.org/10.24071/ijiet.2018.020101
THE KINETIC OF CYCLIZATION-ACETYLATION (R)-(+)-CITRONELLAL WITH ANHYDRIDE ACETIC ACID WHICH CATALYZED OF Zn2+-NATURAL ZEOLITE Cahyono, Edy; Muchalal, M.; Triyono, Triyono; Pranowo, Harno Dwi
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
Publisher : Jurnal Zeolit Indonesia

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Reaction kinetic of acetylation-cyclization (R)- (+)-citronellal with acetic acid anhydride which catalyzed Zn2+-zeolite (Zn2+-Za) was analyzed by Langmuir- Hinshelwood Models. (R)-(+)-citronellal isolated from lemongrass oil with fractionation distillation reduced pressure and analyzed anantiomer ratio with GC chiral column β- DEX 225. Catalyst preparation of Zn2+-Za conducted by acid activation on natural zeolite Malang 100 mesh using 1% HF and 6 M HCl, then soaked on 0,1 M NH4Cl. Calcination was done at 450oC during 1 hour with N2 flow to achieved H-natural zeolite (HZa). Cation exchange H-Za with 0,1 M ZnCl2 conducted to obtain Zn2+-natural zeolit (Zn2+-Za). Reactions of Cyclization-acetylation (R )-(+)- citronellal using a catalyst of Zn2+-Za was done by varying molar ratio of (R )-(+)- citronellal with acetic acid anhydride, namely 0.25, 0.5, 1.0; 1 , 25; 1.5. During the reaction, into system, samples were taken each 1 mL of reaction with duration 10, 20, 30, 60, 120, 180 minutes. Reaction product was extracted with n-hexana. Structure elucidation was done by GC-MS, FTIR spectrophotometer, and 1H-NMR spectrometer. The result showed a greater molar ratio (R)-(+)-citronellal against quantity of acetic acid anhydride acetic, pulegil total was decline. Acetylation-cyclization catalyzed with Zn2+-Za on duration of 30 minutes and 80°C has k of 30.964 to 47.619 mmol (minute.gram catalyst)-1 and KSIT/KAA of 7.09.
KEEFEKTIFAN INKUIRI TERBIMBING BERORIENTASI GREEN CHEMISTRY TERHADAP KETERAMPILAN PROSES SAINS Afiyanti, Nur Amalia; Cahyono, Edy; -, Soeprodjo
Jurnal Inovasi Pendidikan Kimia Vol 8, No 1 (2014): January 2014
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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This research aims to know the effectiveness of guided inquiry oriented green chemistry for science process skills at XI school grade of SMA in Semarang on 2012/2013 period. The population is normal and homogeneous, so to take two groups of samples using cluster random sampling techniques. Design of this research is posttest only control design. The succes of this research seen from cognitive aspect of student achievement reach KKM. At the final stage of the analysis, the t test used was left-test with t count &gt; t table (1.696). The student achievement for experimental classes obtained t count of 3.860 while the control class 0,914. This suggests that the experimental class has achieved mastery learning, while the control class not yet. The average value of the psychomotor aspects of students in the experimental class was 82.6 which is included in the excellent category and control class was 74 included in good category. In the aspect of Students environmental concern, the average value of the experimental class was 88.65 included in the excellent category and class control was 81.7 included in good category. The conclusion was that the research-oriented guided inquiry of green chemistry proved effectively increase the science process skills.Keywords: Green Chemistry, Guided Inquiry, Science Process Skills
HIDEROGENASI METIL EUGENOL TERKATALISIS NI/ZEOLIT ALAM DAN UJI AKTIFITASNYA SEBAGAI ATRAKTAN LALAT BUAH Cahyono, Edy
Sainteknol : Jurnal Sains dan Teknologi Vol 11, No 1 (2013): June 2013
Publisher : Unnes Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v11i1.5562

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Telah dilakukan sintesis 1,2-dimetoksi-4-propil benzena melalui reaksi metilasi eugenol dilanjutkan hidrogenasi metil eugenol yang dihasilkan. Hidrogenasi dilakukan dengan katalis Ni/Zeolit alam. Preparasi katalis dilakukan dengan aktivasi zeolit alam dengan perlakuan asam, impregnasi ion Ni 2+ dan kalsinasi pada temperatur 400 C selama.... jam. Hidrogenasi metil eugenol dengan katalis Ni-Za menghasilkan 1,2-dimetoksi-4-isopropil benzena maksimal 88,61% pada 175 o o C dan durasi reaksi 3 jam. Hasil transformasi diuji strukturnya dengan FTIR dan GC-MS. Spetra IR dan spektra massa membuktikan terbentuknya produk akhir 1,2-dimetoksi-4-propil benzena. Uji aktivitas atraktan 1,2-dimetoksi-4-propil benzena hasil hidrogenasi metil eugenol menunjukkan peningkatan selektivitas dibandingkan metil eugenol. Aktivitas maksimal didapatkan pada botol tidak berwarna (transparan) dengan atraktan 1,2-dimetoksi4-propil benzena dan ketinggian pemasangan 1,5 m.
KEEFEKTIFAN PENGGUNAAN E-LEARNING BERBASIS MOODLEBERPENDEKATAN GUIDED INQUIRY TERHADAP HASIL BELAJARSISWA Muazizah, Noor Malikhah; Nurhayati, Sri; Cahyono, Edy
Jurnal Inovasi Pendidikan Kimia Vol 10, No 2 (2016): July 2016
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Moodle adalah salah satu software open sourcee-learning yang dapat diterapkan dalam proses pembelajaran. Penelitian ini bertujuan untuk mengetahui keefektifan penggunaan e-learning berbasis Moodle dengan pendekatan Guided Inquiry terhadap hasil belajar siswa materi hidrokarbon kelas XI.Populasi dalam penelitian ini adalah siswa di suatu SMAN di Purwodadi Kelas XI MIPA semester gasal tahun pelajaran 2015/2016. Sampel diambil dengan teknik cluster random sampling. Desain yang digunakan dalam penelitian ini adalah posttest-only control design.Pengumpulan data menggunakan metode observasi, wawancara, angket dan tes. Hasil analisis menunjukkan bahwa rata-rata hasil posttest kelas eksperimen dan kelas kontrol berturut-turut adalah 83,33 dan 78,47. Data yang telah diperoleh dianalisis dengan uji perbedaan rata-rata satu pihak yang menunjukkan bahwa thitung lebih besar daripada tkritis.Artinya rata-rata hasil belajar kognitif kelas eksperimen lebih baik daripada kelas kontrol.Hasil analisis kualitatif afektif dan psikomotorik kelas eksperimen tiap aspeknya lebih baik dari kelas kontrol.Berdasarkan hasil penelitian dapat disimpulkan bahwa penggunaan e-learning berbasis Moodle dengan pendekatan Guided Inquiry efektif meningkatkan hasil belajar siswa materi hidrokarbon SMA kelas XI.
Co-Authors Achmad Binadj, Achmad Agustina, Diah Tria Ardi Hermawan, Ardi Arisna Rahmawati, Arisna Arofah, Barorotul Ulfah Asmaul Husna Astuti, Fiki Kusuma Avelisia Kusumawati, Avelisia Aziz Rizqi Pratama, Muhammad Azizah, Yuni Nur Budiarti, Santi Cepi Kurniawan Dewi Selvia Fardhyanti Dian Kumala Sari, Dian Kumala Doni Setiawan Duong, Nguyen Thuy Eko Budi Susatyo Endang Susilaningsih Ersanghono Kusuma Ersanghono Kusumo, Ersanghono Fianti Fianti, Fianti Fourniyati, Indang Retno Gema Arief Wicaksana, Gema Arief Harjono Harjono Harno Dwi Pranowo Henny Ayu Pramesti, Henny Ayu Ida Maesyaroh, Ida Indri Saputri, Indri Julianto Pratomo, Julianto Karomah Dwidayati, Nur Kasmadi Imam Supardi Kusoro Siadi Latifah - Listanti, Dian M. Muchalal Machmudah - Madayanti Khomsyatun, Madayanti Marfina, Apriza Mariana, Elyta Merlianita, Ditha Mubarak, Syarifatul Muchalal Muchalal Murbangun Nuswowati Murtiyanti Setyaningrum, Murtiyanti Nanik Wijayati Natanael Natanael, Natanael Niasri, Niasri Nico Aditya Wijaya, Nico Aditya Noor Malikhah Muazizah, Noor Malikhah Nuni Widiarti Nur Amalia Afiyanti, Nur Amalia Nurcahyo, Bowo Pangesti, Rizki Dwi Pranonowo, Harno Dwi Priyosetyoko Priyosetyoko, Priyosetyoko Rahayu, Endah Fitriani Ratnawati Kusuma Ningsih Ribka Wahyuningrum, Ribka Riyanti . Rizalina, Hartias Rizka Rida Utami Rizkita, Aden Dhana Romawati, Carolina Rudiyanto pakiz, Rudiyanto Saptorini Saptorini, Saptorini Septiyaningsih, Tri Setiarto Pratigto, Setiarto Soeprodjo - Sri Haryani Sri Mursiti Sri Nurhayati Suci Fajariah, Eka Sudarmin Sudarmin Sufiati Bintanah Supartono Supartono Supranowo Supranowo Syafaatunniyah, Syafaatunniyah Tjahyo Subroto, Tjahyo Triyono Triyono Ulung Aggraito, Yustinus Umi Rahmawati,, Umi Uswatun Kasanah, Uswatun Van, Ngoc Chau Widayani, Anis Yuliyati, Tri Budi Yunita, Wulansari