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UPAYA PENINGKATAN HASIL BELAJAR KIMIA FISIKA 5 DENGAN PENDEKATAN CHEMO-ENTREPRENEURSHIP MELALUI KEGIATAN LESSON STUDY

Jurnal Inovasi Pendidikan Kimia Vol 4, No 1 (2010): January 2010
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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Physical Chemistry 5 is a main and diffi cult course for students because of itsrelation to microsspic properties and abstract with the result that the visualization isnecessity. Therefore, the appealing learning that can manure the students’ creativenessand innovation and motivate students to be entrepreneurs is necessity. Such learning is alearning using chemo-entrepreneurship (CEP) approach. Lesson study activity is potentialin learning community and collaboration development effectively. Therefore, the learning ofPhysical Chemistry 5 using CEP approach through lesson study activity is necessity. Thisresearch was aimed to improve the students’ achievement on Physical Chemistry 5 lectureusing CEP approach through lesson study activity. This research was conducted by quasiexperiment method involving students on seventh semester of Chemistry Programme assubject. Lesson study activity was conducted by three stages i.e. planning, doing, andrefl ecting. The instrument of research included the achievement test, observation sheets,and questionnaire sheets. The results showed that the achievement of experimental groupwas higher than of controlled group. The learning completeness of experimental group washigher than of controlled group. It was shown that this learning can improve students’ life skill. Key words: achievement, chemo-entrepreneurship, lesson study

AKTIVITAS KATALIS CR/ZEOLIT ALAM PADA REAKSI KONVERSI MINYAK JELANTAH MENJADI BAHAN BAKAR CAIR

Sainteknol : Jurnal Sains dan Teknologi Vol 8, No 1 (2010): June 2010
Publisher : Unnes Journal

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Telah dipelajari aktivitas katalis Cr/Zeolit alam pada reaksi konversi minyakjelantah menjadi bahan bakar cair. Penelitian ini meliputi preparasi katalis Cr/zeolitalam dengan metode impregnasi, karakterisasi katalis, dan uji aktivitas katalisCr/Zeolit alam dalam reaksi konversi minyak jelantah menjadi bahan bakar cair.Reaksi dilakukan secara kontinyu pada fasa gas. Pada penelitian ini dipelajaripengaruh laju alir hidrogen dan waktu reaksi terhadap konversi minyak jelantahmenjadi bahan bakar cair. Hasil karakterisasi keasaman padatan menunjukkanpeningkatan keasaman total katalis. Analisis kualitatif menunjukkan peningkatankristalinitas katalis Cr/zeolit alam dan adanya spesi oksida dalam katalis seperti CrO2dan Cr2O3. Aktivitas terbaik ditunjukkan oleh kinerja katalis Cr/Zeolit alam padavariasi laju alir 5 mL/menit dan waktu 45 menit dengan konversi 75,23%.Berdasarkan analisis spektroskopi massa, produk mengandung senyawa pentana yangmuncul pada waktu retensi ( tR ) 14,566.Kata kunci : Cr/zeolit alam, minyak jelantah, bahan bakar cair

ANALISIS TINGKAT EMISI RADIASI MEDAN ELEKTROMAGNETIK DARI BTS (BASE TRANSCEIVER STATION) TERHADAP STANDAR IEEE C95.1 DI KOTA TANGERANG SELATAN

JURNAL STANDARDISASI Vol 15, No 2 (2013)
Publisher : Badan Standardisasi Nasional

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Pengukuran paparan radiasi gelombang elektromagnetik dari BTS perlu dilakukan, untuk memberikan informasi seberapa aman radiasi tersebut bagi masyarakat khususnya warga di wilayah Tangerang Selatan yang berada di sekitar menara BTS. Tujuan penelitian ini adalah untuk mengetahui besarnya radiasi elektromagnetik yang diterima pada radius 10m dari titik pusat yang dipancarkan oleh sebuah BTS dan kesesuaiannya dengan standar IEEE C95.1-2005. Pengukuran besarnya radiasi tersebut dilakukan setiap 10 derajat mengitari menara dengan pembacaan koordinat lokasi dan sudut pengukuran untuk menentukan besarnya tingkat radiasi yang ditimbulkan oleh BTS. Nilai tersebut kemudian dikonversikan dalam besaran Power Density yang terhitung, dan kemudian dibandingkan dengan batas ambang standar. Hasil pengukuran menyatakan bahwa radiasi masih berada dibawah nilai batas yang dipersyaratkan, dengan nilai terbesar sebesar -4.419dBm/m2 untuk posisi antena vertikal, sedangkan untuk posisi antena horizontal, sebesar -7.031 dBm/m2 pada frekuensi yang sama 947 MHz.

KAJIAN PENERAPAN SNI 7368:2007 SYARAT MUTU KOMPOR GAS LPG DAN SNI TERKAIT LAINNYA UNTUK BAHAN BAKAR DIMETHYL ETHER (DME)

JURNAL STANDARDISASI Vol 12, No 2 (2010): Vol. 12(2) 2010
Publisher : Badan Standardisasi Nasional

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Dalam rangka mengurangi biaya subsidi minyak tanah, pemerintah Indonesia meluncurkan program konversi minyak tanah ke LPG. Sebagai akibatnya, pemakaian LPG untuk keperluan rumahtangga meningkat drastis, sehingga terjadi kelangkaan LPG di pasaran. Berkaitan dengan hal tersebut, pemerintah bermaksud menggunakan DME sebagai alternatif pengganti LPG, mengingat DME mempunyai sifat yang hampir sama dengan LPG. Di samping itu DME adalah gas yang dapat terbarukan, tidak beracun, ramah lingkungan, dan harganya lebih murah daripada LPG. Permasalahannya adalah apakah kompor dan asesorisnya yang didesain untuk digunakan dengan LPG, juga dapat dan cukup aman digunakan dengan bahan bakar DME. Namun, sampai saat ini belum ada standar uji untuk kompor dan asesorisnya dengan bahan bakar DME. Makalah ini akan membahas hasil kajian penerapan SNI 7368:2007 dan SNI terkait yaitu SNI 7369:2009, SNI 06-7213-2006 dan amandemennya, serta SNI1591:2008 untuk kompor DME. Hasil kajian menunjukkan secara umum SNI 7368:2007 dapat digunakan sebagai standar uji kompor gas DME dengan sedikit revisi pada perhitungan asupan panas dan efisiensi. Sedangkan untuk SNI lainnya perlu studi lebih lanjut mengingat sifat DME yang resisten terhadap karet.

EFEKTIVITAS MODEL PEMBELAJARAN HUITT DENGAN MEDIA QUESTION CARD DAN MODEL PEMBELAJARAN PQ4R DENGAN MEDIA FLIP BOO MAKER TERHADAP HASIL BELAJAR LOGIKA MATEMATIKA SISWA KELAS X SMA NEGERI 1 SEMARANG

Jurnal Pendidikan Matematika Vol 2, No 2 (2015): Jurnal Karya Pendidikan Matematika
Publisher : Jurnal Pendidikan Matematika

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Mathematics is a subject often considered difficult by students from the elementary level, junior, arrived at the high school level Math, this is because it deals with things that are abstract. Therefore teachers of mathematics in learning is expected to have a good mastery, can select the appropriate learning strategies, as well as using the learning models that can improve student learning and student motivation can be moreactive in learning. With that in mind it was all finally can improve student learning outcomes.The fact shows that learning mathematics on Logic X-grade material in SMA Negeri Semarang teachers I still dominate the learning, the students seemed passive and just accept the knowledge provided by the teacher. In addition teachers not to use media learning, not to use the strategies and methods that can enable students so the students understanding of the material is still low. In order to overcome passivity and lack of understanding of students of class X in addition Logic material model Huitt learning with media Question cards and learning model PQ4R with media Flip Book Maker.Through two models this will be seen pempelajaran keektifan students so that they can improve student learning outcomes.This research uses a type of experiment using two classes of experimental and one control class. As the population in this research is the whole grade X which consists of 8 classes, and then randomly selected three classes. One class as a class that implements the I model experiment study of Huitt with media Question cards, a class again as a class that implements the model II experimental learning PQ4R with media Flip Book Maker, as well as one other the rest of the class as the class of the control.Data processing using statistics "(test of normality, test, and test homoginitas ANAVA).The purpose of this study is to: 1) see any difference whether or not the results studied mathematics students who got media learning model Huitt with Question cards, a learning model with a Flip Book PQ4R media Maker, and the learning model Ekospositori, 2) look at the effectiveness of the learning model Huitt with media Question cards, a learning model with a Flip Book PQ4R media Maker, and Ekospositori learning models at sub subject of mathematical logic in the lesson 20142015.From the results of the study indicate that there is a difference between the results of the study of mathematics students who got media learningmodel Huitt with Question cards, a learning model with a Flip Book PQ4R media Maker, model and learning Ekospositori learning more effective, and there is a difference in student learning results in mathematical logic in teaching 2014-2015.Keywords: learning Huitt, PQ4R, Question cards, Flip Book Maker.

PENGARUH MODEL PEMBELAJARAN AKTIF DENGAN PERMAINAN BOLA GULING TERHADAP HASIL BELAJAR SISWA SMA

Jurnal Inovasi Pendidikan Kimia Vol 5, No 2 (2011): July 2011
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

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This study is aimed to investigate the influence of active learning with college ball game and magnitude of impact on student learning outcomes. A preliminary study conducted in SMA 11 Semarang indicated that students learning outcomes on buffer solution and hydrolysis topic are low. This is indicated by the value of daily tests or the last five years thats unable to reach a predetermined value, which is 65. A preliminary study also showed that the level of understanding and interesting in students learning is still lacking. This problem requires an appropriate teaming model to attract the attention of students in learning. Therefore, the active learning model with a college ball game was applied, and then impact on student learning outcome was studied. The population in this study was students of class XI IPA of SMA 11 Semarang on 200912010 academic year. Experimental design used is post-test only control group design and cluster random sampling methode. Based on the analysis of two average difference test is was obtained that the value tcatt (3.92)> ttabte (1.67). It can be concluded that there are differences in learning outcomes between the two groups. The results by test analysis biserial of correlation showed that (rb) (0.53)> SErb*1.96 (0.29). It can be concluded that the correlation between two variables is reliable. The results showed that active learning with college ball game contributes to students learning outcomes with the contribution of 28. 28%.

PENINGKATAN KEMAMPUAN GURU-GURU KIMIA KABUPATEN KENDAL DALAM MENDESAIN PENELITIAN TINDAKAN KELAS

Jurnal Penelitian Pendidikan Vol 30, No 2 (2013)
Publisher : Universitas Negeri Semarang

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The results of preliminary study showed that chemistry teachers in Kendal didn’t know how to design CAR, has not been able to integrate models, strategies, and approaches of learning to certain topics to design CAR, and find the time management difficult in CAR. Thus, it was needed to train them the basic skills to teach so they will be able to design and conduct a CAR that will give a direct impact on the quality instuction in the classroom. This activity was carried out in two main phases, namely seminar and workshop in stage I and mentoring of CAR preparation in stage II. The results of this activity indicated that CAR preparation training for chemistry teachers in Kendal was be able to improve chemistry teachers’ capability in developing CAR. However, an increase in teachers’ character as a figure, in addition to increasing the professionalism of teachers who simply boils down to the academic side is still needed. In addition, the school and the Education Department needs to provide more facilities for the implementation of CAR in school continue to increase the sustainaible quality of the learning process.

SINTESIS BIODIESEL DARI MINYAK JELANTAH SEBAGAI SUMBER ENERGI ALTERNATIF SOLAR

Sainteknol : Jurnal Sains dan Teknologi Vol 9, No 1 (2011): June 2011
Publisher : Unnes Journal

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Telah dilakukan penelitian untuk mensintesis biodiesel dari bahan baku jelantah. Biodiesel merupakan sumber energi alternatif yang potensial untuk mengganti bahan bakar solar dari minyak bumi. Jelantah sebagai bahan baku pembuatan biodiesel berasal dari minyak kelapa sawit yang telah dipergunakan untuk keperluan rumah tangga. Jelantah atau minyak kelapa sawit bekas bersifat renewable (dapat diperbaharui), adapun minyak bumi sebagai bahan baku solar bersifat nonrenewable. Penelitian ini menghasilkan biodiesel dengan sifat fisik sebagai berikut: Densitas 873,5, korosi lempeng tembaga 1, CCR 0,073%, kadar air 0,16%, viskositas 4,649, titik kabut 21, dan Flash point 174,5. Hasil ini menunjukkan bahwa kriteria biodiesel hampir memenuhi standart ASTM D 6751. Unjuk kerja biodiesel dalam mesin diesel dilakukan di Lab. Teknik Mesin UNNES. Biodiesel dicampur dengan solar dengan komposisi 10 % dan 20% dan kemudian dilakukan uji kinerjanya. Hasil uji menunjukkan bahwa biodiesel 10% dan 20% menghasilkan emisi gas buang yang lebih bersih dibanding solar murni dan waktu pembakaran yang lebih lama. Biodiesel 20 % lebih baik dibanding 10%.

SINTESIS NANO ZnO YANG DIEMBANKAN PADA ABU VULKANIK UNTUK KATALIS FOTODEGRADASI DIKLORO DIFENIL TRIKLOROETANA

Indonesian Journal of Chemical Science Vol 1 No 1 (2012)
Publisher : Indonesian Journal of Chemical Science

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STUDI DEAKTIVASI KATALIS Ni-Mo/ZEOLIT ALAM PADA REAKSI HIDRODENITROGENASI (HDN) PIRIDIN

Indonesian Journal of Chemical Science Vol 1 No 1 (2012)
Publisher : Indonesian Journal of Chemical Science

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