Siang Tandi Gonggo
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Meningkatkan Hasil Belajar Ipa Melalui Model Pembelajaran Kooperatif Tipe STAD Pada Siswa Kelas IV SDN No. 1 Lende Kecamatan Sirenja Milawati, Milawati; Gonggo, Siang Tandi; Lagganing, Najamudin
Jurnal Kreatif Tadulako Online Vol 4, No 8 (2016): Junal Kreatif Tadulako Online
Publisher : Jurnal Kreatif Tadulako Online

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Abstract

Penggunaan metode yang sering digunakan oleh guru adalah metode konvensional dimana guru hanya berceramah terus/menerus yang keterlibatan siswa sangat kurang, sehingga guru lebih Nampak aktif dan siswa bersifat pasif dalam proses pembelajaran. Salah satu upaya untuk meningkatkan hasil belajar IPA adalah dengan menerapkan model pembelajaran kooperatif tipe STAD sebagai alternatife guna menunjang keaktifan siswa dalam belajar. Rancangan Penelitian dilakukan yaitu melalui empat tahap yaitu (1) Perencanaan, (2) Pelaksanaan Tindakan, (3) Observasi, (4) Refleksi. Penelitian ini dilakukan pada siswa Kelas IV SDN No. 1 Lende Kecamatan Sirenja pada tahun ajaran 2013/2014 pada semester II (Dua). Hasil belajar pada Mata Pelajaran IPA yang diperoleh siswa dari pemberian tes LKS dan observasi pada semester II (dua) Tahun Ajaran 2013/2014 ini meningkat menjadi 68,7. Sedangkan pada tahun sebelumnya nilai rata-rata siswa pada tahu ajaran 2012/2013 semester I dan II yaitu 61,30,  Dan semester I pada tahun ajaran 2013/2014 nilai siswa menurun hingga 61,00. Berdasarkan hasil analisis data tersebut, maka disimpulkan bahwa pada semester II 2013/2014 hasil belajar IPA melalui model pembelajaran kooperatif Tipe STAD pada siswa Kelas IV (empat) SDN No. 1 Lende Kecamatan Sirenja meningkat, yang dapat dilihat pada nilai ketuntasan belajar klasikal yaitu 68,7 di mana KBK adalah 65,00 lebih dari nilai yang ditentukan dan hasil penilaian ini dapat juga dilihat nilai daya serap individu siswa yaitu : 40%, 50%, 60%, 70%, dan 80%. Kata Kunci: Hasil Belajar IPA, model pembelajaran kooperatif tipe STAD
Meningkatkan Pemahaman Konsep Bagian-Bagian Tumbuhan Melalui Pembelajaran Kooperatif Tipe Student Teams Achievemen Division (STAD) di Kelas IV SDN No.1 Inti Lero Tatari Andriani, Andriani; Rahman, Nurdin; Gonggo, Siang Tandi
Jurnal Kreatif Tadulako Online Vol 4, No 8 (2016): Junal Kreatif Tadulako Online
Publisher : Jurnal Kreatif Tadulako Online

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Abstract

Penelitian ini adalah Meningkatkan pemahaman konsep bagian-bagian tumbuhan melalui pembelajaran kooperatif tipe Student Teams Achievemen Division (STAD) di kelas IV SDN No.1 Inti Lero Tatari. Adapun tujuan penelitian ini adalah untuk mengetahui pemahaman siswa dalam pembelajaran konsep bagian – bagian tumbuhan melalui pembelajaran kooperatif tipe STAD, yang melibatkan 21 orang siswa yang terdiri dari 13 orang siswa  laki – laki dan 8 orang siswa perempuan yang terdaftar pada tahun pelajaran 2013 – 2014. Penelitian ini menggunakan desain penelitian model Kemmis dan Mc Tanggart yang terdiri atas dua siklus. Di mana pada setiap siklus dilaksanakan dua kali pertemuan dikelas  dan setiap siklus terdiri empat tahap yaitu perencanaan, pelaksanaan, observasi, dan refleksi. Dari hasil penelitian menunjukkan bahwa pada tindakan siklus I diperoleh ketuntasan klasikal 61,90% dan daya serap klasikal 73,33%. pada tindakan siklus II diperoleh ketuntasan klasikal 100% dan daya serap klasikal 86,66%. hal ini berarti pembelajaran pada siklus II telah memenuhi indikator keberhasilan. pada kegiatan pembelajaran dengan menerapkan model pembelajaran kooperatif tipe STAD dapat meningkatkan hasil belajar siswa kelas IV pada SDN No.1 Inti Lero Tatari. Kata Kunci: Student Team Achievement Division (STAD), Hasil Belajar IPA
Analisis Kadar Flavonoid dan Fenolat pada Kulit Buah Manggis (Garcininia mangostanaL.) Rezki, Atika Putri; Gonggo, Siang Tandi; Sabang, Sri Mulyani
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.943 KB) | DOI: 10.22487/j24775185.2017.v6.i4.9448

Abstract

This study aimed to determine flavonoid and phenolic levels from the mangosteen bark samples. The preparation process of the sample was performed by extraction through maceration technique using HCl 1% in ethanol and for the phenolic using ethanol. Levels of both analit were determined using a UV-Vis spectrophotometer at the wavelength of 510 nm and 700 nm for the flavonoid, and 765 nm for the phenol. The results showed that flavonoids and phenol levels in the mangosteen bark samples were 1.271 mg/g and 12.373 mg/g.
PROFIL KINETIKA PERUBAHAN KADAR GLUKOSA PADA NASI DALAM PEMANAS Islamiyah, Ukuwah; Gonggo, Siang Tandi; Pursitasari, Indarini Dwi
Jurnal Akademika Kimia Vol 2, No 3 (2013)
Publisher : Universitas Tadulako

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Abstract

Rice cooker is used to keep rice warm and soft. During the warming process there is a change in glucose level in rice. The kinetic profile of glucose level change of rice in rice cooker is important to be done to determine an ideal time needed so that rice is suitable for consumption. The objective of this study is to determine constant reaction rate, reaction order, reaction speed, and half time of glucose level changes of rice in rice cooker. Method of this study is phenol-sulfuric acid, where modest sugar react with phenol in concentrated sulfuric acid produce a stabil orange colour, by using uv-vis that is bsorbed in 490 nm wavelength. The research’s result shows that there is a decreasing on glucose level in rice of mbramo type that is 32.2 ppm to 5.8 ppm for 40 hours kept in rice cooker. The changesof glucose level of rice in rice cooker following equation of one order reaction, with value of constant reaction speed achieved is 3.8 x 10-2/hour, half time 18.2 hours and reaction speed 0.5 ppm/hour.
PENGGUNAAN QR CODE DALAM PEMBELAJARAN POKOK BAHASAN SISTEM PERIODIK UNSUR PADA KELAS X SMA LABSCHOOL UNTAD Mustakim, Sartika; Walanda, Daud K.; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 2, No 4 (2013)
Publisher : Universitas Tadulako

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Abstract

Utilization of information technology in particular a QR code in education is still lacking. Therefore the reseacher is examining the QR code in the chemistry learning. Teaching and learning activities in the classroom are still dominated by teachers, meanwhile students seem expect more aids from their peers in performing the task. which due to a number of student are still lack of confidence in completing their tasks. In this study, the researchers use the QR code in the learning of periodic table topics regarding properties of elements. The problem statement was wether the learning outcomes of student who involved in the learning using QR code are better than student who take lessons without involving the use of QR code. The number of student in class X science Labschool Untad for 2013/2014 academic year are 22 student in experimental classroom and 22 student in control classroom which are determined by purposive sampling. Based on the results, it is concluded that the learning outcomes of students who took lessons with the use of QR code is higher than the learning outcome of students who took the lessons without involving the use of QR code for student in class X SMA Labschool Tadulako University.
Pengaruh Silika Terhadap Membran Blend Kitosan-Polivinil Alkohol-Litium Sebagai Membran Elektrolit Baterai Ion Litium Novitasari, Riska; Gonggo, Siang Tandi; Suherman, Suherman
Jurnal Akademika Kimia Vol 5, No 1 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (395.632 KB) | DOI: 10.22487/j24775185.2016.v5.i1.7999

Abstract

Battery is one  of a source of energy. Increasing the need of energy affects to the diminishing reserves of fossil energy sources. Therefore, this needs for energy sources alternative. Modification of chitosan-polyvinyl alcohol electrolyte membrane added with lithium salt has an advantage on environmentally friendly. This research aims to study the effect of adding percent weight of silica on the conductivity of the electrolyte polymers made from chitosan-polyvinyl alcohol-lithium. The ionic conductivity of the electrolyte polymer chitosan-polyvinyl alcohol-lithium-silica was measured by impedance spectroscopy. The results showed the electrolyte polymer with the addition of 5% silica performed the highest ionic conductivity by 2.005 x 10-7 S/cm. Characteristic of battery made from electrolyte polymer chitosan-polyvinyl alcohol-lithium with the addition of silica performed voltage of 1.5 Volts which was comparable to the commercial battery with the voltage of 1.8 Volts. These results indicate that silica can be used as a filler to improve the ionic conductivity.
Bioadsorpsi Pb(Ii) Menggunakan Kulit Jeruk Siam (Citrus Reticulata) Solika, Nafikatus; Napitupulu, Mery; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.698 KB) | DOI: 10.22487/j24775185.2017.v6.i3.9447

Abstract

A research about the bioabsorption of Pb(II) using the tangerine peel (Citrus reticulata) has been done. The purpose of this study is to determine the optimum contact time of tangerine peel and to determine the pH of the tangerine peel on the adsorption power of Pb(II) in solution. The method used in this study was a laboratory experiment using the tangerine peel waste as the adsorbent of Pb(II). The concentration of Pb(II) adsorbed was measured using a spectrophotometer spectrodirect. The results showed that the optimum contact time of adsorption the metal ions Pb(II) was 60 minutes with the absorption efficiency of 96.19%. The pH optimum of adsorption of the metal ion Pb(II) was at pH 4.0 with the absorption efficiency of 93.05%.
Pengaruh Kaolin Terhadap Membran Blend Kitosan Poli Vinil Alkohol-Litium Sebagai Membran Elektrolit Untuk Aplikasi Baterai Ion Litium Gonggo, Siang Tandi; Diah, Anang Wahid M.; Lanteene, Reki
Jurnal Akademika Kimia Vol 6, No 1 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (503.136 KB) | DOI: 10.22487/j24775185.2017.v6.i1.9229

Abstract

Today, the battery is the most practical and in expensive energy storage device in a modern community. A variety of new materials technologies has been developed in the manufacture of the battery, especially the development of the solid electrolyte (solid). Polymer Electrolytes can be found in the polymer batteries form such as lithium ion polymer battery. A natural polymer such as chitosan is potential as polymer electrolyte membrane for battery applications. The chitosan has amino and hydroxyl groups that allow for modification. The modification of chitosan membrane is expected to produce the better membranes characters. The aim of this research is to study the effect of the addition of inorganic filler kaolin on the conductivity of the polymer electrolyte that made of chitosan-polyvinyl alcohol than was added to the lithium salt. The ionic conductivity of the polymer electrolyte chitosan-polyvinyl alcohol-lithium-kaolin was measured by using an impedance spectroscopy. The measurement results showed that the polymer electrolyte chitosan-polyvinyl alcohol-lithium with the addition of 4% kaolin provide the highest ionic conductivity is large 6.551x10-5 S/cm. In comparison, characteristics of batteries that made from polymer electrolyte chitosan-polyvinyl alcohol-lithium with the addition of kaolin have a voltage of 2.4 volts which have similarities to the commercial batteries. This result indicates that the kaolin can be used as a filler to increase the ionic conductivity of the polymer electrolyte chitosan-polyvinyl alcohol-lithium, and then it can be developed as a battery.
Pemanfaatan Ekstrak Daun Mahkota Dewa (Phaleria macrocarpa (Scheff.) Boerl) sebagai Pengawet Tomat Supriatni, Dina; Said, Irwan; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 5, No 2 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.107 KB) | DOI: 10.22487/j24775185.2016.v5.i2.8012

Abstract

Tomato fruit is one of the fruits susceptible to decay because of its high water content. The durability of tomato can be improved by storing in a humid place or by adding of a preservative. Phaleriamacrocarpa (Scheff.) boerlleaf can act as an antibacterial due to the saponin compounds contained therein. This study aimed to investigate the phaleriamacrocarpa (Scheff.) boerlleaf extract as a preservative for tomatoes, and to determine the concentration of leaf extract to sustain tomatoes texture longer. The method used in this study was the maceration for extraction, and iodometric titration to determine of vitamin C levels before and after curing. The results showed that the pickling tomatoes using phaleriamacrocarpa (Scheff.) boerl leaf extract with a concentration of 6% sustained tomatoes up to 9 days, and the fruit decreased levels of vitamin C from 33.440 mg/100 g material into 27.580 mg/100 g of material.
Penentuan Waktu Optimum Dalam Pembuatan Bioetanol Dari Bonggol Pisang Tanduk(Musa paradisiaca formatypisa) Melalui Fermentasi Setiawati, Eka Lilis; Gonggo, Siang Tandi; Abram, Paulus Hengky
Jurnal Akademika Kimia Vol 5, No 3 (2016)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.853 KB) | DOI: 10.22487/j24775185.2016.v5.i3.8044

Abstract

Banana tuber contains 76% starch as a source of organic material that can be changed to bioethanol which is an alternative of fuel oil. This study aimed to determine the optimum time of fermentation in the process of producing bioethanol from banana (musa paradisiaca formatypisa) tuber. In this study the fermentation of banana tuber is determined using saccharomyces cereviseae with the variation time of 3, 4, 5, 6, 7, 8 and 10 days. The stages carried out in this study were preliminary or sample preparation, delignification, hydrolysis, fermentation and separation. Bioethanol from the fermented ricestraw was analyzed using alcoholmeter. The content of bioethanol product increased on days 3 to 7 and reach the optimum on the day 7 which was 8.90%, where on the day 8 and 10 decreased the ethanol content.