Articles

Found 6 Documents
Search

An Application of Digital Chemistry Telling (DCT) in the Basic Inorganic Chemistry Course to Improve Students’ Listening and Speaking Skills Purwaningsih, Dyah; Sutrisno, Hari; Budiasih, Kun Sri
JOURNAL OF EDUCATION Vol 4, No 01: November 2011
Publisher : JOURNAL OF EDUCATION

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

This study aims to design implementation strategies of DCT in the Basic Inorganic Chemistry course, develop an appropriate course to increase students’ active participation, and develop an evaluation system capable of providing an integrated assessment (both the learning process and outcomes) in the course. This study was conducted in two cycles for one semester during the academic year of 2008/2009. The implementation applied the principles of classroom action research consisting of four stages, i.e. planning, action implementation, observation, and reflection. The data were analyzed by grouping them into categories. The findings were as follows. Qualitatively, the classroom obser­vations showed an increasing active participation of students, both in making the DCT and in conducting discussions in English. Quantitatively, the results of the observations on the learning activities showed an average value of 4 (scale 1-5) for several aspects of DCT.
ADSORPSI NITROGEN DARI URIN DENGAN ZEOLIT Utomo, Pranjoto; Widjajanti, Endang; Budiasih, Kun Sri
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
Publisher : Jurnal Penelitian Saintek

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

The aims of the research were to determine the nitrogen contained in human urine before and after applying zeolyte and to determine  the influence of MgO to nitrogen  contained in human urine. The determination of zeolyte adsorption capacity to nitrogen contained in human urine included 3 steps: activation of natural zeolyte, nitrogen adsorption, total nitrogen determination  by Kjedahl test. Zeolyte activation was done by soaking zeolyte into 0,1 M HCl,  HNO3,  and H2SO4 for 1 hour and calcinated for 4 hours at 400°C. The adsorption proses was done by adding inactivated and activated  zeolyte with and without MgO adding. The optimum mass of zeolyte was 3 grams. The  adsorption  capacities  of inactivated zeolytes without and with MgO adding were 0.007809% and 0.0102% per gram zeolyte, respectively. The adsorption capacities of activated zeolyte by HCl,  HNO3, dan H2S04 without MgO adding were 0.00604%, 0.00664% and 0.00917% per gram zeoliyte. The adsorption capacities  of activated zeolyte by HCl,  HN03,  dan H2S04 with MgO adding were 0.00839%, 0.0104%, dan  0.011% per gram zeolyte. The  activation  and MgO adding increased  the adsorption capacity of zeolyte to nitrogen contained in human urine.
PENGARUH VARIASI RASIO Mg/Al PADA SINTESIS HIDROTALSIT DENGAN METODE KOPRESIPITASI HIDROTERMAL Handayani, Sri; Kusumawardani, Cahyorini; Budiasih, Kun Sri
Jurnal Penelitian Saintek Vol 19, No 1 (2014): April 2014
Publisher : Jurnal Penelitian Saintek

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Katalis terbagi menjadi dua yaitu katalis homogen dan heterogen. Katalis yang sekarang terus berkembang adalah katalis heterogen karena mudah dipisahkan dan dapat digunakan kembali. Tujuan penelitian ini adalah sintesis dan karakterisasi Hidrotalsit Mg/Al sebagai salah satu katalis heterogen yang dapat digunakan dalam reaksi kondensasi aldol. Cara yang digunakan untuk sintesis Hidrotalsit adalah metode kopresipitasi hidrotermal. Sintesis hidrotalsit Mg/Al diawali dengan optimasi suhu hidrotermal. Selanjutnya dilakukan variasi mol Mg/Al dengan rasio 1-4 pada suhu hidrotermal optimal dan dikalsinasi pada 4000C. Karakterisasi dilakukan menggunakan FTIR untuk analisis gugus fungsional serta XRD untuk melihat strukturnya. Hasil karakterisasi hidrotalsit sintesis menunjukkan bahwa kondisi terbaik diperoleh pada perbandingan mol Mg/Al sebesar 3:1
Penentuan Efisiensi Immobilisasi Kromium (VI) Pada Geopolimer Abu Sekam Padi Dengan Uji TCLP (Toxicity Characteristic Leaching Procedure) Budiasih, Kun Sri
Eksakta: Jurnal Ilmu-Ilmu MIPA VOLUME 12, ISSUE 1, February 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

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

Abstract

This research aimed  to determine  the efficiency of immobilization of Cr(VI) on  the rice husk  ash  based  geopolymer with  a TCLP  (Toxicity Characteristic  Leaching Procedure)  study. The TCLP was    refer  to  the  standard method  from  Japan  Environmental  Agency. There were three  variables  used  i.e.,    concentration  of Cr(VI)  impregnated,  particles  size,  and  the  kind  of leaching  water. Determination  of  immobilization  efficiency  was  done  by  calculate  the concentration  of  Cr(VI)  in  the  leachate  water  after    the  leaching  processes.    Quantitative measurement of the chromium was done by Uv-Vis spectrometer with biphenyl carbazid  reagent. Immobilization of Cr(VI) on the rice husk ash based  geopolymer was establish until 25 ppm Cr impregnated. The efficiency of the immobilization can reach 90% - almost 100% depend on the variable of leaching processes.   Keywords: eficiency, immobilization, geopolimer, rice husk ash, TCLP study
Synthesis of Mg/Al Hydrotalcite by Using Low Supersaturated Precipitation Method with Variation of Mole Ratio Septyaningrum, Christanty Wahyu; Handayani, Sri; Kusumawardani, Cahyorini; Budiasih, Kun Sri
Eksakta: Jurnal Ilmu-Ilmu MIPA VOLUME 14, ISSUE 2, August 2014
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol14.iss2.art1

Abstract

This research aims to synthesize Mg/Al hydrotalcite with mole ratio variations of Mg/Al precursor through low supersaturated precipitation method. Mg/Al hydrotalcite was synthesized with Mg/Al mole ratio variation of 1:1, 2:1, 3:1, and 4:1. Mg/Al hydrotalcite was synthesized using NaOH and Na2CO3 base solutions. The mixture of precursor was stirred for 2 hours then treated by hydrothermal at 100 °C for 4 hours. Results of the synthesis Mg/Al hydrotalcite with mole ratio variations is a white powder. The formation of the structure of Mg/Al hydrotalcite showed by certain peaks in the FTIR spectra and XRD diffractogram.The results of data analysisshowed that variation of mole ratio Mg/Alcauses a shift of peak in the XRD diffractogram shifted towards the left along with a comparative increase in mole ratio Mg/Al, but the main functional groups on the compound Mg/Al hydrotalcite increasingly formed with better.
Penyuluhan Dan Pelatihan Teknologi Pemanfaatan Tanaman Obat Berbasis Kearifan Dan Sumber Daya Alam Lokal Untuk Perbaikan Tingkat Kesehatan Masyarakat Desa Karangsari Wedomartani Sleman Handayani, Sri; Atun, Sri; Aznam, Nurfina; Budiasih, Kun Sri
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 1, No 1 (2017)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v1i1.12964

Abstract

Program Pengabdian kepada Masyarakat ini bertujuan untuk memberikan penyuluhan dan pelatihan teknologi pemanfaatan tanaman obat berbasis kearifan dan sumber daya alam lokal untuk perbaikan tingkat kesehatan masyarakat desa karangsari wedomartani Sleman. Pada akhirnya kegiatan ini akan memberikan wawasan, pengetahuan, kemampuan, dan keterampilan kepada warga terutama para remaja dan  ibu –ibu dalam memanfaatkan bahan alam di lingkungan sekitar sebagai minuman kesehatan. Kegiatan ini dilaksanakan pada tanggal 7 Agustus 2016 dengan peserta kegiatan adalah remaja dan ibu-ibu PKK desa Wedomartani Sleman. Kegiatan ini diawali dengan analisis permasalahan di lapangan, diikuti oleh persiapan rancangan  pelaksanaan program, pelatihan dan sosialisasi program yang dilengkapi alat dan bahan serta sarana dan prasarana penunjang kegiatan. Kegiatan diakhiri dengan sosialisasi serta pengarahan pembuatan minuman kesehatan berbasis sumber daya alam local.Hasil kegiatan ini menunjukkan bahwa 100% para peserta pelatihan merasakan bahwa kegiatan ini bermanfaat dan memiliki kemauan yang kuat untuk belajar hal baru. Dengan pelatihan yang berkelanjutan,diharapkan peserta memiliki pengetahuan dan keterampilan yang dapat digunakan untuk meningkatkan kualitas hidup bahkan menunjang kebutuhan ekonomi. Kata kunci: Tanaman obat, sumber daya alam local