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All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Jurnal SOLMA JMM (Jurnal Masyarakat Mandiri) Agritechnology : Jurnal Teknologi Pertanian Jurnal Inovasi dan Teknologi Pembelajaran (JINOTEP) Kajian dan Riset Dalam Teknologi Pembelajaran Patria : Jurnal Pengabdian Kepada Masyarakat Jurnal Riset Pendidikan MIPA Jurnal Abdimas Ilmiah Citra Bakti (JAICB) Mattawang: Jurnal Pengabdian Masyarakat Jurnal Akademika Kimia Jurnal Ilmu Pendidikan Indonesia Jurnal Akademika Kimia Jurnal Pendidikan MIPA
Mery Napitupulu
Pendidikan Kimia FKIP Universitas Tadulako Palu Indonesi 94119
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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PENGARUH MODEL POE (PREDICT-OBSERVE-EXPLAIN) TERHADAP HASIL BELAJAR KIMIA PADA KELAS XI MATERI KELARUTAN DAN HASIL KALI KELARUTAN DI SMA NEGERI 4 PASANGKAYU M., Erni; Napitupulu, Mery; Sakung, Jamaluddin
Jurnal Akademika Kimia Vol 2, No 2 (2013)
Publisher : Universitas Tadulako

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Abstract

The type of in this research is the experimental of research with using of model POE (Predict-Observe-Explain) held in to SMAN 4 Pasangkayu XI science of class. The experiment class (XI IPA 2) using POE learning the model cinsists of 21 student and the class of control (XI IPA 1) using of research conventional learning model to consists of 17 students. This research aims to determine the effect learning of a POE model on learning outcomes in chemistry class XI science student of SMAN 4 Pasangkayu. The test was gave before and after the learning twice (pretest and posttest). The observation sheet was used to observe student’s learning of activities. T test was performed after normality test and data homogenity. Based on the data analysis the average for experiment class is 11.07 with the mastery percentage of 71.42% while of 28.57% did not completed. For a control class average to valve 9,08 with the percentage completeness to valve learning a student 41.17% while not completed of 58.82%. In this matter to pointed that there are to affect of POE model on learning result in chemistry to XI exact science of class with material on the solubility and product solubility to SMAN 4 of Pasangkayu, cause can to interest layer and result of student learning.
Pengaruh Alumina Terhadap Membran Blend Kitosan-Polivinil Alkohol- LitiumSebagai Membran Elektrolit Baterai Mesakh, Eka Putra; Napitupulu, Mery; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 2 (2017)
Publisher : Universitas Tadulako

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Abstract

The research aim was to study the effect of adding % weight alumina on the conductivity of polymer electrolyte chitosan-PVA-lithium. The characterization of functional groups was determined using fourier transform infrared spectrometry (FTIR). The Ionic conductivity of polymer electrolyte chitosan-PVA-lithium-alumina was measured by using impedance spectroscopy. The measurement results show the polymer electrolyte with the addition of 5% alumina provides the highest ionic conductivity of 3.991 x 10-3S/cm. Battery characteristics of electrolyte polymer of chitosan-PVA-lithium with the addition of alumina have a voltage of 1.4 Volts compared to commercial batteries which have a voltage of 1.5 Volts. These results indicate that alumina can be used as a filler to increase the ionic conductivity.
Pengaruh Konsentrasi Getah Pohon Kayu Jawa (Lannea Coromandelica) Terhadap Konduktivitas Membran Blend Kitosan-Polivinil Alkohol-Litium Sebagai Membran Elektrolit Masriana, Masriana; Napitupulu, Mery; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

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This research aims to study the concentration effect percentage weight of kayu jawa latex on the conductivity of membranes made from chitosan-PVA-lithium. The ionic conductivity of the membrane chitosan-PVA-lithium-latex kayu jawa was measured by impedance spectroscopy. The measurement results showed that membrane with the addition of 15% latex kayu jawa provided the highest conductivity values of 10.99353 x 10-4 S/cm. Characterization of the polymer electrolyte batteries that made from chitosan-PVA-lithium with the addition of latex kayu jawa have voltage of 1.5 Volts compared to commercial batteries that have tension was 1.5 Volts. These results indicated that latex kayu can be used as a filler to increase 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

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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%.
Digesti Logam Zink(Zn) Dalam Sedimen Estuaria Sungai Palu Dengan Kombinasi Asam Mineral Galib, Stefhanny; Said, Irwan; Napitupulu, Mery
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

The research was conducted to determine the digestion power is highest of Zn metal with the combination of mineral acids in the estuarine sediments of Palu River samples. Zn metal concentrations in the sediments were analysed by Atomic Absorption Spectroscopy (AAS) at a wavelength of 231.9 nm. The results showed that water content ranged between 30.36%-37.18%, ash content ranged from 52.40%-68.76%, and biomass content ranged from 0.88%-10.42%. Analysis of AAS showed the significant average of Zn metal on a combination of mineral acids HNO3-H2SO(1:1) was 289.95182.49 mg/kg, and on a combination of mineral acids HNO3-HCl (1:3) was 669.18447.2 mg/kg. While calculation results of the relative standard deviation values were 25.35% for the combination of mineral acids HNO3-H2SO4 (1:1), and 22% for the combination of mineral acids HNO3-HCl (1:3). The combination of mineral acids having the highest digestion to the Zn metal in the estuarine sediments of Palu River was a combination of mineral acids HNO3-HCl (1:3).
Analisis Kadar b-Karoten Buah Pisang Raja (Musa Paradisiacal L) dan Pisang Kepok (Musa Paradisiaca Forma Typica) dengan Metode Spektrofotometri UV-Vis Zarnila, Zarnila; Napitupulu, Mery; Jura, Minarni Rama
Jurnal Akademika Kimia Vol 7, No 4 (2018)
Publisher : Universitas Tadulako

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Abstract

Banana fruit is a fruit that contains many nutrients. One of that is b-carotene, b-carotene is a provitamin that plays an important role in the formation of vitamin A. This study aimed to determine the levels of β-carotene in raja and kepok bananas. This research used a qualitative and quantitative method, which is the qualitative method using TLC while the quantitative method using UV-Vis spectrophotometry. The TLC results obtained that Rf b-carotene comparison was 0.97 cm, Rf of banana raja extract was 0.96 cm and banana kepok extract was 0.97 cm. Based on the UV-Vis spectrophotometry result, b-carotene content of raja banana fruit was 0.222 mg/100 grams while the kepok banana fruit was 0.261 mg/100 grams, therefore the highest level was banana kepok.
Effect of Concentration of Mango Seed Extract (Mangifera Indica L.) as an Organic Inhibitor on Iron Nail Corrosion in NaCl Solution Medium Almahdali, Khafifah; Walanda, Daud K; Napitupulu, Mery
Jurnal Akademika Kimia Vol 8, No 1 (2019)
Publisher : Universitas Tadulako

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Abstract

This study aims to determine the effect of mango seed extract concentration on the rate of corrosion of iron nails in corrosive medium of NaCl solution and seawater as comparison.The research begins with maceration of mango seeds followed by evaporation to produce the extract as an inhibitor with a variation of concentration 1 - 5%. The method of determining the corrosion rate was the weight loss method with soaking for 7 days. The results showed that the highest corrosion inhibition efficiency occurred at 3% concentration for immersion with corrosive medium of 3% NaCl and 2% concentration for soaking in sea water with efficiency respectively 15.34% and 10.63%. Based on the results of the study, it was found that the increasing concentration of mango seed extract resulted in the efficiency effect on corrosion of nails.
Biocharcoal dari Kulit Rambutan (Nephelium lappaceum L.) sebagai Adsorben Zink dan Tembaga Setiawan, I Ketut Ardi; Napitupulu, Mery; Walanda, Daud K.
Jurnal Akademika Kimia Vol 7, No 4 (2018)
Publisher : Universitas Tadulako

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Abstract

Rambutan peel is one source of biocharcoal production to adsorb metal ions because of the potential of cellulose content. This study aimed to describe the characteristics of biocharcoal from rambutan peel as well as to determine biocharcoal adsorption to zinc and copper based on the variation of biocharcoal weight and metal ions concentrations. The method used in this study was a laboratory experiment, and metals were analyzed using spectrophotometer spectroDirect. The results showed the moisture and ash levels of the biocharcoal were 0.4% and 5.4%, respectively. The optimum weight of biocharcoal to adsorb Zn and Cu ions was 40 mg with their percentage adsorption of 98.81% and 98.94%, respectively. The optimum concentration adsorption of biocharcoal to Zn ions was 40 ppm with the percentage adsorption of 98.32%, while for the Cu ions was 60 ppm with the percentage adsorption of 98.25%.
Students' Perceptions Of The Inorganic Chemistry Classroom Management Through A Web-Based Instructional System Daud Karel Walanda; Mery Napitupulu; Detris Poba
Jurnal Pendidikan Kimia Indonesia Vol. 6 No. 1 (2022)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpk.v6i1.41404

Abstract

Pengelolaan kelas dalam proses pengajaran khususnya mata pelajaran kimia akan menjadi signifikan agar hasil belajar menjadi optimal. Namun kegitan pembelajaran yang dilaksanakan saat ini kurang optimal sedangkan berdampak pada hasil belajar. Penelitian ini bertujuan untuk menganalisis persepsi mahasiswa dalam manajemen kelas mata kuliah kimia anorganik. Jenis penelitian ini yaitu penelitian kuantitatif. Metode dan instrument yang digunakan untuk mengumpulkan data yaitu instrument. Subjek penelitian ini adalah 40 mahasiswa. Teknik yang digunakan untuk menganalsis data yaitu analisis deskriptif kualitati dan kuantitatif. Hasil penelitian menunjukkan bahwa persepsi mahasiswa tentang GC berada pada kategori memuaskan dan merekomendasikan GC untuk digunakan dalam pelajaran lain. Effect size dihitung dari perbedaan rata-rata pre-test dan post-test sebelum dan sesudah pembelajaran dengan menggunakan rumus Cohen dan diperoleh efektivitas GC menurut kriteria Cohen adalah 1,77, yang berarti bahwa ukuran efek Google Classroom luas; maka GC sangat efektif digunakan dalam mengajar mata kuliah kimia anorganik. Disimpulkan bahwa pengelolaan kelas melalui sistem instruksional berbasis WEB efektif digunakan dalam pembelajaran.
Analysis of Vitamin C and Calcium in Jongi Fruits (Dillenia serrata Thunb) Based on Their Maturity Level Miryam B. Kalase; Daud K. Walanda; Mery Napitupulu
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.246 KB) | DOI: 10.22487/j24775185.2019.v8.i3.pp147-152

Abstract

Jongi plant (Dillenia serrata Thunb) is one of the plants that found  Poso District. The characteristics of this fruit are mainly on the refreshing sour taste and attractive color which is yellow. This study aims to determine the levels of vitamin C and calcium in this fruit based on the level of maturity. The fruit of jongi used as a sample was categorized into there type of maturity namely mature, ripe, and overripe. The method used for vitamin C analysis was iodimetry and for calcium, analysis using spectrophotometry (λ: 422.7 nm). From the results of the analysis, it was obtained that the levels of vitamin C in fruit jongi successively were 81.84, 114.40, and 70.40 mg/100 g, while the calcium levels obtained in the fruits were 5.91, 5.65, and 6.46 mg/100 g. The data above showed that the maximum vitamin C content in jongi fruit when the fruit was in ripe type, while the highest calcium content in jongi fruit was when the fruit in overripe type.
Co-Authors Afadil Almahdali, Khafifah Anang Wahid M.Diah Areeya Milehman Arwansyah Arwansyah Bau Ratu Budi Rahayu, Budi Cresna, Cresna Daud Karel Walanda Delviana Melego Detris Poba Dwijogo, Wasis D Enar, Rohmala Ersa W. Lakukua Galib, Stefhanny Ginting, Dewi Gleryl F. Novemly Hajerina, Hajerina Hutagaol, Jhon I Komang Jati Purnawan I Nengah Kundera I W. A. Wirawan Ijirana Iriani, Fitri Irwan Irwan Jamaludin M Sakung Kesumasari, Ni Made Kusuma, I Gede Yoga Nata Leonardo Leonardo Lis K. Djaledje Lumbantobing, Ria M., Erni Madjid, Nurhidayah Abd. Masriana Masriana, Masriana Mesakh, Eka Putra Minarni Rama Jura Minarni Rama Jura Miryam B. Kalase Muhammad Agus Muljanto MUHAMMAD ALI Napitupulu, Nurasyah D Nurasyah Dewi Napitupulu Nurdin Rahman Nurhikma, Nurhikma Nuriadi, Nuriadi Parwati, Ni Kadek Fina Poba, Detris Podala, Katherina Pongenda, Rudy Christiyanto Punaji Setyosari Purnama Ningsih Ratman Ratman Ratman Ria Lumbantobing Rita Lefrida Ryka Marina Walanda Sarungallo, Zita Septianingsih, Siti Fathonah Setiawan, I Ketut Ardi Siang Tandi Gonggo Siti Nuryanti Sitti Rahmawati Situngkir, Risma U Solika, Nafikatus Sri Hastuti Virgianti Pulukadang Sri Mulyani Sabang Susilawati, Niluh Eka Tahril Taslima Tiara Maharani, Tiara Walanda, Richard Albert Walanda, Ryka M Walanda, Ryka M. Zarnila, Zarnila