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All Journal Medika Tadulako Jurnal Akademika Kimia Media Eksakta Jurnal Akademika Kimia Jurnal Banua Oge Tadulako JIPI (Jurnal IPA dan Pembelajaran IPA) Mitra Sains Jurnal Akademika Kimia
Suherman Suherman
Pendidikan Kimia Universitas Tadulako
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Health Professions Mathematics Medicine & Pharmacology Physics Public Health Other

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Conceptual Changes of Students in Thermodynamics in Physical Chemistry Course Through The Implementation of Blended Learning Afadil Afadil; Sitti Rahmawati; Suherman Suherman
Jurnal Akademika Kimia Vol. 10 No. 3 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.724 KB) | DOI: 10.22487/j24775185.2021.v10.i3.pp174-181

Abstract

This study aims to determine the conceptual changes of students after participating in learning with a blended learning approach on Thermodynamics material. This research is a type of pre-experimental (pre-experimental design) with a One Group Pretest-Postest Design. The blended learning approach is applied using the Problem Based Learning model. The research sample was Class C Odd Semester 2019/2020 students which consisted of 34 students who programmed Physical Chemistry courses. The instrument used is a two-tier multiple choice test which includes concepts in Thermodynamics material which is equipped with a valid CRI. The blended learning approach is one approach that can be used that facilitates student activities in utilizing ICT through the delivery of materials, discussion of task completion, and training in the search for teaching materials on Thermodynamics material. The results showed that misconceptions still occur in every concept of Thermodynamics. The average reduction of misconceptions (MC) is 11.2%, the increase in the number of students to knowing concept (KC) classically is 19.2%, and the decrease in the number of students unknowing concept (UKC) is classically 8.1%. Students' conceptual changes to the material of Thermodynamics are still low. Students are required to understand well the content of the material related to basic concepts, mathematical equations (formulas), and the applicative forms of concepts in everyday life in accordance with the characteristics of the thermodynamic material.
HUBUNGAN UMUR, JENIS KELAMIN MAHASISWA DAN PENDAPATAN ORANG TUA DENGAN TINGKAT KECEMASAN PADA MAHASISWA PENDIDIKAN SARJANA PROGRAM STUDI PENDIDIKAN DOKTER FKIK UNIVERSITAS TADULAKO Indah Puspasari Kiay Demak; Suherman Suherman
Medika Tadulako: Jurnal Ilmiah Kedokteran Fakultas Kedokteran dan Ilmu Kesehatan Vol 3, No 1 (2016)
Publisher : Medika Tadulako: Jurnal Ilmiah Kedokteran Fakultas Kedokteran dan Ilmu Kesehatan

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Abstract

Latar Belakang : Riset Kesehatan Dasar tahun 2007 menjelaskan bahwa di Indonesia prevalensi gangguan jiwa sekitar 4,6%, sedangkan gangguan  mental emosional jauh (kecemasan), lebih besar yakni sebesar 11,6%. Tingginya angka gangguan emosional tersebut mengindikasikan bahwa individu  mengalami suatu perubahan  emosional yang apabila tidak ditangani dengan baik dapat berkembang menjadi patologi.Metode : Rancangan penelitian cross sectional, sampel berjumlah 110 orang yang terdiri dari mahasiswa pendidikan sarjana tahun ajaran pertama. Data dianalisis menggunakan uji Chi square. Variabel penelitian ini adalah umur, jenis kelamin mahasiswa  dan pendapatan orang tua.Hasil : Dari hasil pengelolahan data Chi square, menunjukan bahwa tidak terdapat hubungan antara umur dengan tingkat tingkat kecemasan yang memiliki p- value lebih dari 0,05. Untuk variabel jenis kelamin menunjukan adanya hubungan dengan tingkat kecemasan dimana p-value kurang dari 0,05 dan pada variabel pendapatan orang tua menunjukan tidak terdapat hubungan dengan tingkat kecemasan dimana p-value lebih dari 0,05.Keseimpulan :Tidak terdapat hubungan antara umur dengan tingkat kecemasan (p=0,064) dengan (α= 0,05 ). Terdapat hubungan antara jenis kelamin mahasiswa dengan tingkat kecemasan (p=0,000) dengan (α= 0,05 ). Tidak terdapat hubungan antara pendapatan orang tua dengan tingkat kecemasan (p = 0,166 ) dengan (α= 0,05).Kata kunci : Kecemasan, umur, jenis kelamin, dan pendapan orang tua.
PENGARUH PEMBELAJARAN METODE ACCELERATED LEARNING TERHADAP HASIL BELAJAR SISWA KELAS XI IPA MAN I PALU PADA POKOK BAHASAN LAJU REAKSI Nur Intan A. Sumarau; Suherman Suherman
Jurnal Akademika Kimia Vol 2, No 1 (2013)
Publisher : Universitas Tadulako

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Abstract

This research is an experimental study.The aim of this study is to determine the effect of using accelerated learning and conventional methods for the learning result of class XI IPA MAN I academic year 2012/2013.The hypothesis of this research is there are significant effect between accelerated learning method and the learning result of class XI in reaction rate subject. Researchers took two classes to be used as the sample, which consisted of class XI Science II as a control with conventional methods and class XI science I as an experiment class with Accelerated Learning methods.Based on the obtained result, average value of student with conventional methods (grade control) is 6.47, while the average value of students with accelerated learning method (experimental class) is 9.67. From the t-test,was obtained thitung = 1.808> ttable = 1.66.This shows Ho refused and H1 accepted, so it can be concluded that there is significant effect between accelerated learning method with the learning result of reaction rate subject, rather than using conventional learning method. Accelerated learning method gave higher learning result than using conventional method in reaction rate subject.
KARAKTERISASI FISIKOKIMIA MINERAL LEMPUNG SEBAGAI BAHAN DASAR INDUSTRI KERAMIK DI DESA LEMBAH BOMBAN KECAMATAN BOLANO LAMBUNU KABUPATEN PARIGI MOUTONG Siang Tandi Gonggo; Fina Edyanti; Suherman Suherman
Jurnal Akademika Kimia Vol 2, No 2 (2013)
Publisher : Universitas Tadulako

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Abstract

Clay is very important mineral in human life, especially as raw material for the fabrication of ceramics. Clay forms a mixture of minerals, which has a variety structure. The purity and type of mineral of clay as raw material determines the product quality of the resulting caramics. In this research, the type and structure of mineral has been characterized by XRD, XRF and SEM techniques and olso physical properties of the formation of clay ceramics have been axamined. The results of XRD characterization revealed that clay from Desa Lembah Bomban, Labuno, Parigi Motong regency contains kaolin, quartz, anorthit, cristobalite. Based on the results of XRF analysis, the clay contains SiO2 56.26%, Al2O3 23.18%, Fe2O3 4.99%, K2O 1.99%, MgO 1.73%, TiO2 0.980%, 0.841% Na2O ; CaO 0.840%. Physical characterization showed that from Desa Lembah Bomban clay was a less plastical type with linear drying shringkage of about 8.08%, linear firing shringkage 0.66% with total porisity of about 48.02%, and the compressive strength at 9000C about 8.135 x 106 (N/m2). SEM analysis results showed that the clay that has burned more dense than unfired.
PERBEDAAN HASIL BELAJAR KIMIA MELALUI PEMBELAJARAN KOOPERATIF TIPE BUZZ GROUP DENGAN TIPE STAD DALAM POKOK BAHASAN IKATAN KIMIA PADA SISWA KELAS X SMAN 4 PASANGKAYU Etty Etty; Suherman Suherman; Supriadi Supriadi
Jurnal Akademika Kimia Vol 2, No 4 (2013)
Publisher : Universitas Tadulako

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Abstract

This research aimed to determine the differences in student outcomes that given cooperative model of Buzz group type with STAD type in students ofclass X SMA Negeri 4 Pasangkayu. Sample used consists of two classes, namely class XB as Buzz class group and class XA as STAD classes were determined by purposive sampling. Data collection was conducted using a test instrument, be in the form of student achievement test chemistry in the form (multiple choice) as many as 30 items. Testing research data using statistical analysis t test (right side) with the prerequisite test, test for normality, and homogeneity. In this research obtained the median of student learning outcomes using learning Buzz groupmodel was 19.56 while median of student learning outcomes with STAD cooperative model is 16.46. Based on statistical hypothesis testing with t test statistic (right) obtained values of thitung > ttabel was 1.771 > 1.67 with the degree of freedom = 0.05 and df = 59. The results showed that there was a difference in student learning outcomes using cooperative learning group Buzz type with student learning outcomes using STAD type cooperative.
Karakterisasi FTIR Poliblend Adsorben Serbuk Biji Buah Kelor (Moringa Oleifera) Dan Cangkang Ayam Ras Untuk Pengolahan Air Gambut Di Daerah Palu Barat M. Yusi Prilina Bertus; Suherman Suherman; Sri Mulyani Sabang
Jurnal Akademika Kimia Vol 3, No 1 (2014)
Publisher : Universitas Tadulako

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Abstract

The seed of moringa (Moringa oleifera) is used as natural water purification materials and are coagulant. Biocoagulant materials combined in this study were egg shells. Egg shell is known to contain high calcium. This study aims to determine the character of polyblends in physical – chemical test, the degree of swelling an polyblends functional groups, and to determine the optimum ability of the polyblends power absorption. The research method used was sampel preparation, polyblends characterization, swelling degree and to analyze FTIR functional group and water quality test with parameters. The research results showed that the physical character polyblends lasting effectiveness was polyblends SBK : SCT with a ratio of 5:5, while the chemistry test of polyblends character with FTIR analysis showed the functional groups OH, C=C, CH, CH2, CO which each have their own unique characteristics. The water quality with parameters of turbidity, good polyblends adsorption was polyblends SBK:SCT with ratio of 7.5:2.5 with a decreased of 91.43%, ferrous metal content, polyblends SBK:SCT with a ratio of 7.5:2.5 declined 90.90%. The value test of BOD and COD, the best polyblend adsorption was polyblends 5:5 with 93.26% dcreased. Polyblends that produced the best pH of water quality was polyblend with a ratio of 7.5:2.5 with the pH value of 4.68 turned to 7.82.
Antioksidan Dari Daun Sirih Merah (Piper Crocatum) Jeane Maria Mustika Tonahi; Siti Nuryanti; Suherman Suherman
Jurnal Akademika Kimia Vol 3, No 3 (2014)
Publisher : Universitas Tadulako

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Abstract

Research on the antioxidant activity testing has been done using red betel (Piper crocatum) leafs in Palu, Central Sulawesi. This research was conducted to determine the IC50 value and antioxidant activity of red betel leafs extracts which has the ability as a natural antioxidant. This research was conducted with an experimental method using an extraction maceration technique, DPPH (1,1-diphenyl-2-pikrilhidrazil) as free radicals, vitamin C as a positive control, UV-Vis spectrophotometer as an antioxidant test equipment with red betel leafs extracts as samples. Samples of red betel leaves were used as much as 30 grams, and the solvent were absolute ethanol. Various concentrations of the red betel leafs extracts were 20 ppm, 40 ppm, 60 ppm, and 80 ppm. Testing of antioxidant activity was done by using a UV-Vis Spectrophotometer and IC50. The results showed that the IC50 value of the red betel leafs (Piper crocatum) extracts was 47.45 ppm. The red betel leafs extract was categorized into a very powerful antioxidant based on IC50 value, where the optimum percentage of red betel leaf extract activity in inhibiting free radical was 81.82%.
Model Pembelajaran Kooperatif Tipe Make A Match Untuk Meningkatkan Hasil Belajar Kimia Siswa Kelas X Pada Materi Hidrokarbon SMA Negeri 1 Dolo Elvian Togagu; Suherman Suherman; I Made Tangkas
Jurnal Akademika Kimia Vol 3, No 3 (2014)
Publisher : Universitas Tadulako

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Abstract

Hydrocarbon is one of the chemical topics that is taught in grade X in senior high school.This topic consisted of carbon (C) and hydrogen (H) elements in the discussion process. The objective of this research was to improve the students’ learning outcomes of grade X by applying cooperative learning model make a match type in chemistry subject, with hydrocarbon material at SMA Negeri 1 Dolo in the academic year 2012/2013. The subjects of this research were the students of grade XA with the total number of 26 students. The instruments used in this research were pre-test, post-test which consist of 16 questions and observation sheets. From the students’test results; it was found that there were 23% students were in low category. After the researcher applied the cooperative learning model with Make A Match type in the first cycle, the percentage of the students’ classical completeness reached to 73%, with the classical absorption of 77% in good category. In the second cycle, the percentage of the students’ classical completeness was 96% with the classical absorption percentage of 84% which is in very good category. It could be seen from the outcomes that after cooperative learning model make a match type applied, there was an improvement in the percentage of the students’ learning outcomes.
AKUMULASI LOGAM TIMBAL (Pb) DALAM IKAN BELANAK (Liza melinoptera) YANG HIDUP DI PERAIRAN MUARA POBOYA (Accumulation of Lead (Pb) Metal in Mullets (Liza melinoptera) that Live in Poboya River Estuary) Melisa Arsad; Irwan Said; Suherman Suherman
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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Abstract

Poboya River estuary that known to have been contaminated with heavy metals, one of them is metal lead (Pb). This is because the high human activity in the surrounding waters hed, which may be the source of the entry of heavy metals into the estuary waters. Poboya River estuary has many kinds of marine life, including fish such as Belanak (Liza Melinoptera). Fish used as an indicator of contamination that occurred in the waters. This study aims to determine how much accumulation and metal concentrations of lead (Pb), which accumulates in fish living Belanak Poboya estuaries. The method used is the gravimetric method for determining water content, biomass and low ash content, while the analysis of the samples in this study using Atomic Absorption Spectrometry instrument (SSA). The results showed that the water content mobtained at 55.830%. While the levels of biomass were obtained for 89.200% and ash content of meat samples obtained at 10.790%. While the results showed that the accumulation of the metal lead (Pb) in Belanak fish average of 1.746 ± 1.673mg/kg. That exceeds the maximum value of the metal Lead in food in accordance with ISO 01-2729.1-2006, ie 0.4 mg/kg.
Variasi Perbandingan Volume Fasa Membran Dan Fasa Internal Serta Konsentrasi HNO3 Dalam Fasa Internal Terhadap Ekstraksi Ion Timbal(II) Menggunakan Teknik Emulsi Membran Cair Baharuddin Hamzah; Widya Astuti; Suherman Suherman; Siti Rabiah Laonu
Jurnal Akademika Kimia Vol 4, No 2 (2015)
Publisher : Universitas Tadulako

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Abstract

The research about variation of volume ratio of membrane/internal phase and concentration of HNO3 in internal phase on lead(II) extraction by liquid membrane emulsion technique. Volume ratios of the membrane and the internal phases used were 2:1, 2:2, 2:3 and 2:4 while the HNO3 concentrations used were 1M, 2M, 3M and 4M. The chemical used in this extraction was benzoylacetone as chelating agents. The determination of extraction was performed by spectrodirect spectrophotometer. The results showed the largest extraction percentage on the extraction of the ion lead(II) in solution by using emulsion liquid membrane was obtained in the volume ratio of the membrane and the internal phases of 2:3 with HNO3 concentration in the internal phase of 3M. these numbers can extract the ion lead(II) as much as 238 ppm in 180 mL with the extraction percentage of 84.45.
Co-Authors Afadil Agustin Tiwow Andi M. Rendi Andi Tanra Tellu Asnila Asnila Baharuddin Hamzah Burhan Burhan Dessy Amalia Lubis Detris Poba Eka Anisyah Miftahul Jannah Elvian Togagu Etty Etty Fina Edyanti Gavrila Gavrila Hartati Is Mentemas I Made Tangkas Ijirana Indah Puspasari Kiay Demak Intan Pratiwi Irma Ragentu Irna Vidianawati Irwan Said Jeane Maria Mustika Tonahi Kasmudin Mustapa M. Yusi Prilina Bertus Megawati Megawati Melisa Arsad Nirmala Nirmala Nur Asmara Nur Azizah Nur H. Wahyuni Nur Intan A. Sumarau Nurfauzia Nurfauzia Paulus Hengky Abram Purnama Ningsih Sayid Z. S. Alwi Siang Tandi Gonggo Siang Tandi Gonggo Siti Masita Siti Nuryanti Siti Rabiah Laonu Sitti Rahmawati Sri Mulyani Sabang Supriadi Supriadi Tahril Wayan A. K. Mahardika Widya Astuti