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Siang Tandi Gonggo
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Chemistry Education

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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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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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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
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

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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

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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.
Uji Efektivitas Ekstrak Daun Sambiloto (A. Paniculata [burm.F] ness) Sebagai Bahan Pengawet Alami Tomat Dan Cabai Merah Pusung, Widya Astuti; Abram, Paulus Hengky; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 5, No 3 (2016)
Publisher : Universitas Tadulako

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Abstract

Preservation synthetically or naturally is intended to extend the storability of tomato and red chili. Sambiloto (A. paniculata [Burm.f] Nees) is containing saponins that has anti-bacterial properties, therefore can be used as a preservative. The aim of this study was to investigate whether the extract of sambiloto leaf can be used as a natural preservative for tomato and red chili, and to determine the concentration of extract of sambiloto leaf which was effectively used as the preservative. The method used in this study was maceration to produce extract and iodometric titration to determine the levels of vitamin C before and after preservation. The results showed that the pickling tomatoes and red chili using extract of sambiloto leaf with a concentration of 6% sustained tomates up to 9 days and red chilies up to 11 days. Level of vitamin C contained in tomato was decreasing from 39.9 mg/100g to 37.54 mg/100g of material while red chilli is decreasing from 79.78 mg/100g to 72.74 mg/100g of material.
Pemanfaatan Buah Mengkudu (Morinda citrifolia L.) Sebagai Adsorben Untuk Meningkatkan Mutu Minyak Jelantah Juliana, I Nengah; Gonggo, Siang Tandi; Said, Irwan
Jurnal Akademika Kimia Vol 4, No 4 (2015)
Publisher : Universitas Tadulako

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Abstract

The aim of this study is to lower the value quality parameters of used cooking oil to reach the national industry standards using adsorbent of noni (morinda citrifolia L.) fruit as well as to determine the optimum concentration (% w/w) of noni in increasing quality of used cooking oil. The parameters in this study are the water content, free fatty acids, colour and density. The method used to determine the water content and free fatty acid levels were the gravimetric method and acid-base titration, while determination of the colour and density used UV-Vis spectrophotometer and pycnometer. The concentration of noni adsorbent in the oil refining process varied ie 12%, 15%, 18%, 21%, and 24%. The results showed that the water content, free fatty acids, and the density decrease with an increase in adsorbent. The oil colourwas brighter with increasing noni fruit adsorbent used. The study showed that the noni fruit adsorbent can lower the value quality parameters of used cooking oil, and only the density from the four parameters did not meet ISO standard. The concentration weight per weight (% w/w) optimum noni fruit was 24%.
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

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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.
PERBANDINGAN PENERAPAN METODE PEMBELAJARAN ROLE PLAYING DENGAN PEMBELAJARAN KONVENSIONAL TERHADAP HASIL BELAJAR KIMIA SISWA SMA NEGERI 1 LORE UTARA Masrita, Masrita; Gonggo, Siang Tandi; Sabang, Sri Mulyani
Jurnal Akademika Kimia Vol 2, No 1 (2013)
Publisher : Universitas Tadulako

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Abstract

Research dealing with role-play Learning and conventional learning methods, have been conducted. The main reason for this research was that chemical bond was one of the difficult but fundamental materials to be mastered by the students at grade X. The purpose of this research was to investigate the students’ achievement on the topic of chemical bond at SMA Negeri 1 North Lore. One way of increasing their achievement was by using role-play method. In order to make their learning understandable, not boring, and easy to grasp, the researcher applied an interesting method called role-play. The population of this research was the tenth grade students of SMA Negeri 1 North Lore in the academic year 2012/2013. The sample was 32 students of grade XA as the experimental group (role-play) and 32 students of grade XC as the control group (conventional learning). The data were collected through the test on chemical bond. Based on the analysis, it is found that the average score of the experimental group was 20.65 with deviation standard of 2.413 and of the control group was 15.06 with deviation standard of 2.975. The hypothesis testing was that the t-counted value was 12.75 and the t-table value was 1.67 with the significant value (α) of 0.05. The results showed that there was a significant difference in the students’ achievement dealing with the topic of chemical bond through the application of role-play learning method and conventional learning method at grade X at SMA Negeri 1 North Lore in the Academic Year 2012/2013.
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.
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

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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.
Co-Authors Andriani Andriani Daud Karel Walanda Diah, Anang Wahid M. Febiliyanti, Rezha Indarini Dwi Pursitasari Irwan Irwan Islamiyah, Ukuwah Juliana, I Nengah Jumadil, Jumadil Lanteene, Reki Masriana Masriana, Masriana Masrita, Masrita Mery Napitupulu Mesakh, Eka Putra Milawati Milawati Moede, Fika Herlina Mustakim, Sartika Najamudin Lagganing Nurdin Rahman Paulus Hengky Abram Pusung, Widya Astuti Raguwan, Raguwan Ratman Ratman Rezki, Atika Putri Salim, Agustiawan Amat Santi Santi Setiawati, Eka Lilis Sitti Rahmawati Solika, Nafikatus Sri Mulyani Sabang Supriatni, Dina Vanny M. A Tiwow