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All Journal Jurnal Pendidikan Kimia Undiksha Jurnal Entropi Sainstek Alchemy : Journal of Chemistry TELKOMNIKA (Telecommunication Computing Electronics and Control) The Journal of Pure and Applied Chemistry Research QUANTUM: Jurnal Inovasi Pendidikan Sains Jurnal Zarah Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Journal Health & Science : Gorontalo Journal Health and Science Community Jambura Journal of Educational Chemistry Jambura Journal of Chemistry RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi Acta Chimica Asiana Jurnal Sibermas (Sinergi Pemberdayaan Masyarakat) Jurnal Pengabdian Masyarakat (ABDIRA) Indonesian Journal of Pharmaceutical Education JURNAL KIMIA SAINTEK DAN PENDIDIKAN Jurnal Pengabdian Masyarakat Farmasi : Pharmacare Society Mutiara: Multidiciplinary Scientifict Journal Algoritma: Jurnal Matematika, Ilmu Pengetahuan Alam, Kebumian dan Angkasa RADIAL: Jurnal Peradaban Sains, Rekayasa dan Teknologi Konstanta : Jurnal Matematika dan Ilmu Pengelatuan Alam
Ishak Isa
Universitas Negeri Gorontalo
Aerospace Engineering Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Journal : Jurnal Entropi

 1 
IDENTIFIKASI MASALAH PROFESIONALISME CALON GURU PADA MAHASISWA PENDIDIKAN KIMIA FMIPA UNIVERSITAS NEGERI GORONTALO Aminah, Siti; Baderan, K; Lukum, Astin; Isa, Ishak
Jurnal Entropi Vol 5, No 1, 2009
Publisher : Jurnal Entropi

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Abstract

This research was aimed to know the problems of the teacher professionalism that faced of Chemistry Education students to Mathematic and Natural Science Faculty of Gorontalo State University after PPL, and to know the dominant problems about teachers professionalism.The result of this research showed that the teacher professionalism problems of student were (1) teacher base competence including managing teaching learning process and class, material mastery, using media and source of learning, so assessment., (2) doing KTSP including new and same item with old curriculum, different curriculum, KTSP component, applying CTL approach and its application to schools. The dominant problems about teacher professionalism that related to teacher base competence were using media and source of learning about 66,20%, so material mastery about 59%. The dominant problems related to doing CTL including application of CTL about 64% and KTSP application to schools about 63,50%.
MENINGKATKAN HASIL BELAJAR SISWA KELAS X1 SMU MUHAMMADIAH BATUDAA PADA MATERI STRUKTUR ATOM MELALUI STRATEGI QUESTION STUDENT HAVE Idrus, Selvian; Isa, Ishak; Ischak, Netty Ino
Jurnal Entropi Vol 5, No 1, 2009
Publisher : Jurnal Entropi

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Abstract

This research involved X1 Grade students of SMA Muhammadiyah Batudaa with total number of students were 21 students. It consist of 9 male students and 12 female students of 2008/2009 academic years. Technique in collecting the data was observation. This research was a classroom action research and it was done during one semester as two cycles. The observation result of teacher activity in first cycle got excellent criteria as 72, 72 and good criteria as 27,27. While in second cycle, it was improved as 36 % reached excellent criteria and 64 % reached good criteria. Besides that, observation result of students in first cycle is students who got an excellent criteria was 57,13 % and good criteria was 42,85% while in second cycle it was improved, that is students who got an excellent criteria was 29% and good criteria was 71%. Students achievement in first cycle were 13 students or 61,905 got score more, than 6,9 and 8 students or 38,09% got score less than 6,9. while the students achievement in second cycle was improved. It was 18 students or 85,71% got score more than 6,9 and 3 student got score less than 6,9 with classical absorption was 71,42%.Based on that result above, the applications of question student have strategy in atom structure lesson can improve student achievement. There fore, the hypothesis in this research can be accepted.
PENETAPAN TIMBAL, KADMIUM DAN TEMBAGA SECARA VOLTAMETRI PELARUTAN KEMBALI Isa, Ishak
Jurnal Entropi Vol 1, No 2, 2006
Publisher : Jurnal Entropi

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Abstract

The low consentration analysis of Lead, Cadmium, and Copper have been conducted by Differential Pulse Anodic Stripping Voltametry (DPASV) method using Hanging Mercury Dropiping Electrode (HMDE). DPASV method comprises two important steps. The firs step is deposition of a metal at the electrode sufase by electrolysis carry out by controlled potential. The second step is the metal stripping which have been precipitated at the electrode into the solution. The current, that is generated by stripping, is recorded by differential pulse mode. The optimum condition of instrumental parameters are deposition potential -700 mV, deposition lime 90 seconds, stripping rate 2000 rpm, 5 size of mercury drop and supporting electrolyte nitric acid at pH 1,5 which in produced by dilution of 50 L of 65% nitric acid suprapure until 10 mL solution. The precision (coefficient of variation) of analytical method was 9,24% Cd, 9,80% Pb, and 9,68% Cu. The accuracy of analytical method was 2,5% Cd, +1,76% Pb, and +7,30% Cu. The detection limit of analytical method was 29,9760 ng/L Cd, 42,4283 ng/L Pb, and 275,3222 ng/L Cu. The computation of concentration was based on twice addition standar technique.
PENDEKATAN SETS (SCIENCE, ENVIRONMENT, TECHNOLOGY, AND SOCIETY) DALAM PEMBELAJARAN REDOKS PADA SISWA KELAS X MADRASAH ALIYAH NEGERI LIMBOTO Umar, Lisdawati N.; Isa, Ishak; Bialangi, Nurhayati
Jurnal Entropi Vol 5, No 1, 2009
Publisher : Jurnal Entropi

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Abstract

The research is experiment research that aimed to prove the different of students achievement that was taught by using SETS approach and by conventional significantly at MAN Limbotos students. The population were students of XA class, XB class and XC class of MAN Limboto in 2008/2009 academics years that consisted of 86 students. The sample was students of XA class and XC class that consisted of 50 students. The sample was taken by using Cluster Random Sampling technique. The instruments in collecting the data was essay test that validity and reliability had tested before. Method of data analyses were normality test, homogenity test and hypothesis test. At hypothesis test, it got tcount = 2.322, while ttable = 1,711. The result showed that students achievement that was taught by using SETS approach is better than students achievement that was taught by using conventional in Oxidation and Reduction Reaction lesson.
Meningkatkan Hasil Belajar Siswa Pada Materi Ikatan Kimia Dengan Menggunakan Model Pembelajaran Kooperatif Tipe STAD Pada Siswa Kelas X3 SMA Negeri 3 Gorontalo Uno, Mayawati; Isa, Ishak; Lukum, Astin
Jurnal Entropi Vol 2, No 2, 2007
Publisher : Jurnal Entropi

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Abstract

The title of classroom action research is Improving the achievement of concep atom structure thought cooperativeThis research involves the students of class X4 SMA N 3 Gorontalo of in academic year 2008/2009. with cooperative learning model jigasaw type thats have purpose for increasing study result of students class X4 in subject of atom strukture.Based in classroom action prosedure, analysis and reflection on action hypothesis testing doing in a stage. And continuous that is on every ending activities from every cycle. 85 students who on observation paper minimal reach the nice category. The students achievement in cycle I, from 32 students there are 18 students who get more than (6,9), and 14 students get less that (6,9) with the average (6,74), while in the cycle II is improve where 32 students there are 28 students (87,5) get more than 6,9 and students get less than 6,9 with the average 8,0 and the average of applicapibility 82,75. Based on the students achievement in apply of cooperative learning model jigsaw type in structure atom can be improve the students achievement, so the hypothesis in this research is valid.
KAJIAN KEMAMPUAN DALAM MEMAHAMI SENYAWA KOMPLEKS UNSUR-UNSUR TRANSISI PERIODE KEEMPAT PADA MAHASISWA JURUSAN PENDIDIKAN KIMIA UNIVERSITAS NEGERI GORONTALO Laiya, Saripa A.; Isa, Ishak; Pikoli, Masrid
Jurnal Entropi Vol 5, No 1, 2009
Publisher : Jurnal Entropi

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Abstract

The research is descriptive that aimed to know how is the Students ability in comprehending complex compound of transition elements of fourth period in students of Chemical education Department of Gorontalo State University. Technique in collecting the data was test as instrument. Result of validity test was 100% and reliability coefficient was 0,74%. The result showed that students comprehending in complex compound material of transition elements of fourth period were (1) determining central atom at complex compound as 37,23%, (2) determining ligand at complex compound as 39,02%, (3) determining coordination number from complex ion as 35,12%, (4) determining the content of complex compound as 40,78%, (5) writing complex compound formula as 25,5%, (6) giving the name of complex compound as 30,82%, (7) determining the hybridizes of complex compound as 20,56% and (8) determining the form of complex compound as 40,78%.
Co-Authors Abidin, Khoirul Ahmad Kadir Kilo Akram La Kilo Andimala, Febriyanti Annisa Untuba Arviani Arviani Astin Lukum Balong, Sulsitiawati Bukani, Windi Doly Prima Silaban Elawati, Elawati Elvira T Haruna Endah Nurrohwinta Djuwarno Erga Kurniawati Erni Mohamad Febriyanti Andimala Fitryane Lihawa giu, fitri ani Halalutu, Hamdan Halalutu, Hamdan Haleda, Padria Haris Lukum Haris Munandar Hendri Iyabu Hendri Iyabu Hendri Iyabu Hendri Iyabu Hiola, Faramita Ibrahim, Indriyanti Indriati Martha Patuti Ishak, Candrawati Jafar La Kilo Jafar La Kilo Jafar La Kilo Julhim S Tangio K Baderan Kasim, Sesha Ramadhani La Ode Aman Lanto Ningrayati Amali Latief, Suti Anggriani LATIF, MULTIANI S Lisdawati N. Umar Lukman A. R. Laliyo Maimun Wahab Mangara Sihaloho Mardjan Paputungan Marike Mahmud Maryam Padi Masrid Pikoli Mayawati Uno Merlin Darise Meyrin Hamzah Mohamad Adam Mustapa Mohamad Aprianto Paneo Muhammad Taufiq Nur Muhammad Taupik Musa, Weni J.A Musa, Wenny J.A Najmah Najmah Najmah, Najmah Nento, Tia Dwi Lestari Netty Ino Ischak Nita Suleman Nita Suleman Nita Suleman Novianti, Rani Nur Ain Thomas Nurhayati Bialangi Ode Aman, La Openhotman, Openhotman Opir Rumape Padi, Maryam Pahrun, Abdul Wahab Pakaya, Agustina H. Papeo, Dizky Ramadani Putri Rahma, Sity Wirid Rifadli Bahsuan Riskawati Pomolango Rusli Isa Rusmani Tasanif Saripa A. Laiya Selvian Idrus Siti Aminah Sitti Suhada Sity Wirid Rahma Sri Andrawati Biya Sukertini, Kadek Sunarty Suly Eraku Thayban, Thayban Tiro, Lusiani La Umar, Ahmat Sudir Usman, Yuyan Ali Wenny J.A Musa Weny J.A Musa Widayanti . Wiwin Rewini Kunusa Yuszda K Salimi Zainal, Sriyanti Zainudin, Farnawaty