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All Journal Jurnal Pendidikan Karakter Cakrawala Pendidikan MAJALAH ILMIAH PEMBELAJARAN Indonesian Journal of Chemistry and Environment Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia
Das Salirawati
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Education Materials Science & Nanotechnology

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Journal : Cakrawala Pendidikan

 1 
SPESIALISASI MATERI AJAR SEBAGAI UPAYA PENGEMBANGAN PROFESIONALISME GURU Das Salirawati
Jurnal Cakrawala Pendidikan No 3 (2008): Cakrawala Pendidikan, November 2008, Th. XXVII, No. 3
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v3i3.321

Abstract

AbstractThe school-based curriculum gives teachers freedom to design and develop alllearning activities for students by themselves, so it is expected that the teacherscompetence can be improved optimally. Besides, teachers creativity andinnovation can be developed to increase their professionalism. But, the fact showsthat the teachers responsibility is so heavy that they do not have enough time todevelop their professionalism. Almost all SMPs/MTss and SMAs/MAs inIndonesia assign teachers some duties based on classes. One of the ways toimprove teachers mastery can be done by taking specialization in teachingmaterials. This method gives some advantages to teachers and students as well. Forthe teachers, specialization in teaching materials can make them: (1) concentrate onthe teaching material development; (2) plan learning strategies effectively; (3) lookfor references easily and attentively; (4) write summaries and modules; (5) selectseminars and workshops to attend; and (6) direct students based on their ability.For the students, specialization in teaching materials can make them: (1) get theunity of concepts from the same teacher; (2) avoid needless character adaptationfrom different teachers; (3) detect self-ability; (4) look for references easily; and (5)avoid from learning over-lapping concepts. It seems difficult to implementspecialization for teaching material, but by having a good intention to increaselearning quality in Indonesia, all difficulties and obstacles can be handled. Patienceand seriousness are really needed to start a new thing. Whatever the result is, thiseffort should be made.Keywords : specialization, effort, professionalism, teacher
PENCEMARAN LINGKUNGAN OLEH ADANYA PROSES B10METILASI LOGAM BERAT Hari Sutrisno; Das Salirawati
Jurnal Cakrawala Pendidikan CAKRAWALA PENDIDIKAN, EDISI 2,1993,TH.XIII
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (217.728 KB) | DOI: 10.21831/cp.v2i2.8968

Abstract

Air limbah industri yang dikeluarkan oleh proses-proses industriberbeda-heda dalam jumlah maupun kekuatan pencemaranoya,sesuai dengan satuan operasi atau proses yang merupakansumbernya. Dalam Ungkup sempit. air limbah buanganyang dapat dapat mengakibatkan pencemaran antara lain:buangan dari laboratorium kimia, yang di dalamnya terdapatlogam-Iogam herat, seperti air raksa, arsen. .Logam herat tersebut dapat berubah menjadi suatusenyawa metil dari logam herat yang sangat berbahaya bagikesehatan, baik dalam bentuk gas maupun cab". Proses 1nlterjadi dengan bantuan bakteri dalam kondisi anaerob karenadi dalam bakteri ada suatu koenzim metilkobalamin. Mekanismeperpindahan metil menjadi suatu senyawa metiI darilogam berat yang utama melalui: serangan elektrofilH: Fadaikatan Co-C (metilkobalamin) atau perpindahan CH3-, danserangan radikal bebas (CH3.).Agar hasil dari reaksi' di a tas tidak terjadi (da pa t dikurangi)diperlukan suatu teknik pembuangan, proses pengolahansedemikian rupa sehingga proses metilasi oleh bakteritidak dapat berlangsung. Misalnya, penghilangan ion-ionlogam berat sebelum dibuang ke lingkungan.
Co-Authors Eddy Sulistyowati Fadilla Panca Syaputri HARI SUTRISNO Herlina Rani Wijayanti Imam Pratama Jane Maureen Perwita Riski Kusumawati Retno Arianingrum Safira Eka Dewi Togu Gultom