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All Journal Jurnal Hortikultura Indonesia (JHI) Jurnal Kreatif Tadulako Online Jurnal Akademika Kimia Panrannuangku Jurnal Pengabdian Masyarakat Jurnal Akademika Kimia

Vanny M. A Tiwow

Pendidikan Kimia University Of Tadulako

Author-ID : 713607

Agriculture, Biological Sciences & Forestry Humanities Chemistry Education Engineering Health Professions Library & Information Science

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Articles

Title

The Implementation of Blended Learning Based on MOODLE on Student’s Chemistry Learning Outcome at Class X in SMA Negeri 3 Poso Wayan A. K. Mahardika; Vanny M. A. Tiwow; Suherman Suherman
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

The growth of technology has encouraged learning toward blended learning which combines e-learning-based learning with the conventional face-to-face learning system. The use of MOODLE software to created web-based virtual class and the benefits of social interaction, making blended learning to has a more flexible and efficient time with more varied learning media. This research aimed to determine the effect of the implementation of blended learning based on MOODLE on student chemistry learning outcomes at class X in SMA Negeri 3 Poso. The research was conducted by giving treatment to the experiment class 1 (n = 32) and repeating the same treatment to the experiment class 2 (n = 33). The average pretest value in experiment class 1 was 19.06 and in experiment class 2 was 20.30. While the average of posttest value in experiment class 1 was 76.50 and in experiment class 2 was 73.00. The test of hypotheses was conducted using the Wilcoxon Signed Rank Test with criteria is, if –Ztable ≤ Zcalculate ≤ +Ztable then H0 is accepted. The value of Zcalculate in experiment class 1 was -4.93 and in experiment class 2 was -5.01. Based on the data, it been concluded that there was an effect of the implementation of blended learning based on MOODLE on student’s chemistry learning outcomes at class X in SMA Negeri 3 Poso.

The Differences between Learning Outcomes Using Guided Inquiry and Team Assisted Individualization (TAI) Types of Learning Models on Redox Reaction Concept Material in Grade X at SMA Negeri 2 Sigi Mildha Y. Charin; Ratman Ratman; Vanny M. A. Tiwow
Jurnal Akademika Kimia Vol. 8 No. 4 (2019)
Publisher : Universitas Tadulako

This study aimed to determine the differences between students’ learning outcomes using guided inquiry-type learning model and team assisted individualization (TAI)-type learning model on redox reaction concept in grade X at SMA Negeri 2 Sigi. This study was a quasi-experiment method. The sample was class X MIA5 as an experiment class I (n = 24 students), and class X MIA1 (n = 24 students) as an experiment class II. The data analysis showed that the average score of experiment class I was 73.79, and the experimental class II was 71.45. The results of the hypothesis test with t-test two-party statistics obtained tcount = 0.86. The value was in the reception area of H0 that was between -1.68 and 1.68. The result from the statistical test showed that there was no difference between the students' learning outcomes using guided inquiry-type and team assisted individualization type learning models on redox reaction concept material in grade X at SMA Negeri 2 Sigi

The Influence of Experiental Learning Model Assisted Experiment on Material Electrolyte and Non-electrolyte Solutions toward the Learning Outcome of Students Class X MIA at SMA Negeri 3 Palu Yonathan Banua; Sri M. Sabang; Vanny M. A. Tiwow
Jurnal Akademika Kimia Vol. 9 No. 1 (2020)
Publisher : Universitas Tadulako

This research focused on the influence of the experiential Learning Model Assisted Experiment on material electrolyte and non-electrolyte solutions toward the learning result of science students class X MIA at SMA Negeri 3 Palu. This research used quasi-experimental with a control group research design using pre-test and post-test. The population was all of science students class X MIA at SMA Negeri 3 Palu registered in the 2016-2017 academic year. The purposive sampling was used in choosing the sample. The sample in this research was the students of experiment class (n = 32) and control class (n = 32). The statistic data used a one-party t-test with a prerequisite test: normality and homogeneity test. Based on the result of hypothesis testing, it showed that tcounted > t1-α (tcounted = 3.35 and ttable = 1.67) with the level of significance a = 0.05 and degree of freedom 61, as the result H0 was rejected and H1 was accepted, means there was a significant difference between experimental group and control group. Therefore it can be concluded that there was an influence of experiential learning model-assisted experiments on material electrolyte and nonelectrolyte solutions toward the learning result of chemistry students X MIA at SMA Negeri 3 Palu.

Application of Cooperative Learning Model of Two Stay-Two Stray (TSTS) Type on the Reaction Rate Material on the Students’ Learning Outcomes in Class XI SMA Negeri 1 Banawa Tengah Alfiani Alfiani; Irwan Said; Vanny M. A. Tiwow
Jurnal Akademika Kimia Vol. 9 No. 1 (2020)
Publisher : Universitas Tadulako

This study aims to analyze the influence of students’ learning outcomes on reaction rate by applying the cooperative learning model type TSTS (two stay-two stray) in class XI SMA Negeri 1 Banawa Tengah. The type of research was quasi-experimental (quasi-experimental research) with a nonrandomized pretest-posttest control group design. This study was conducted on two classes, namely class XI IPA 1 as an experimental (n= 32) and class XI IPA 2 as the control class (n= 32). Analysis data used the two-party t-test statistical with the prerequisite test, namely normality and homogeneity test. The results showed that the learning outcomes of students in the experimental class X̅1was 76.93 with a standard deviation = 8.62 while in the control class X̅2 was 72.06 with a standard deviation= 8.53. The results of hypothesis testing obtained – ttable≤ tcount + ttable which was -1.67 <3.25> +1.67 with a significant level (α= 0.05) and degrees of freedom = 62. This showed that H0 was rejected and H1was accepted it can be concluded that there is an effect of the application of the two stay-two stray (TSTS) type cooperative learning model on the reaction rate to the students’ learning outcomes of class XI SMA Negeri 1 Banawa Tengah.

Analysis of Nitrogen Nutrients in Liquid Organc Fertilizers from Wastewater of Rice Washing and Coconut Husks Mixture Wardatul Hanifah; Vanny M. A. Tiwow; Ratman Ratman
Jurnal Akademika Kimia Vol. 9 No. 1 (2020)
Publisher : Universitas Tadulako

This study aimed to determine the process of making a liquid organic fertilizer from wastewater of washing rice and coconut husks as well as to determine the amount of nitrogen contained in liquid organic fertilizer. Nitrogen contents were determined using a colorimeter. The results showed that the nutrient content of nitrogen in the liquid organic fertilizer from wastewater of washing rice and coconut husk from fermentation process in a sample of 10 days for a ratio of 1: 3, 1: 1 and 3: 1 was obtained that nitrogen contents were respectively 0.52, 0.41, and 0.20%. The results of fermentation in a sample of 14 days for a ratio of 1: 3, 1: 1 and 3: 1 obtained that nitrogen contents were 0.62, 0.49, and 0.25%.

Effect of Problem Based Learning Model on the Chemical Reaction Rate toward Critical Thinking Ability of Students Kasmiati Kasmiati; Tahril Tahril; Vanny M. A. Tiwow
Jurnal Akademika Kimia Vol. 9 No. 4 (2020)
Publisher : Universitas Tadulako

This study aimed to identify the effect of the problem-based learning model on the reaction rate toward critical thinking abilities of students of MAN 1 Palu. This study was a quasi-experiment with a pretest-posttest control group design. Sampling was taken by purposive sampling technique with the sample of class XI MIA 3 as the experimental group (n = 18) and class XI MIA 4 as the control group (n = 14). The results of the study and data analysis obtained an average value of students' critical thinking skills from the questionnaire that the experimental group was 82.95%, higher than the control group (73.43%). The average value of students' critical thinking skills from the description test showed that the experimental group was 79.42%, higher than the control group (58.02%). Students' critical thinking skills data using parametric statistical analysis with t-test (right-party t-test) obtained tcount > ttable was 6.83 > 2.04 which corresponds to the H1 acceptance area, therefore H1 was accepted and H0 rejected. This means that students 'critical thinking skills in the experimental group were higher than in the control group. The results of this study concluded that the problem-based learning model had a significant influence on the thinking ability of students in grade XI on the reaction rate at MAN 1 Palu.

The Implementation of SAVI (Somatic, Auditory, Visual, and Intellectual) Learning Model toward Critical Thinking Ability of Students in Grade XI on the Subjects of Solubility and Solubility Product Constant (Ksp) Sarmilah Sarmilah; Afadil Afadil; Vanny M. A. Tiwow
Jurnal Akademika Kimia Vol. 10 No. 1 (2021)
Publisher : Universitas Tadulako

This study aimed to determine students' critical thinking ability through the implementation of SAVI (somatic, auditory, visual, and intellectual) learning model on the subject of solubility and solubility product constant (Ksp) at SMA Negeri 5 Model Palu. The study used one group pretest-posttest design. The instruments were lesson plans, critical thinking tests, students' worksheets, and validated observation sheets. Data of critical thinking abilities were analyzed using rubrics with three indicators, i.e. interpretation, analysis, and inference. Results of data analysis on students' critical thinking skills at the pretest on each indicators in Experiment class I were 25.84, 11.13, and 2.44%, respectively; while in class II were 23.51, 1.38, and 0%, respectively. The posttest in Experiment class I were 69.94, 61.13, and 53.51%, respectively, while in class II were 79.55, 48.61, and 49.07%, respectively. The average of students' critical thinking skills ability in experiment class I was 61.02%, and class II was 61.47%. Both of them were in the moderate category. This study concludes that students' critical thinking skills ability with the implementation of SAVI learning model is in a good category. The average of students' critical thinking skills ability in experiment class I was 61.02%, and in experiment class II is 61.47%. Both of them were in the moderate critical thinking category. This study concludes that students' critical thinking skills ability with the implementation of SAVI learning model is in a good category.

The Utilization of Aleorites Moluccana Active Charcoal as Absorbent of Lead Metal in Used Oil Wayan N. Sugiani; Vanny M. A. Tiwow; Minarni R. Jura
Jurnal Akademika Kimia Vol. 10 No. 2 (2021)
Publisher : Universitas Tadulako

Candlenut (Aleurites moluccana) shell is a waste produced from the processing of the plants having a fairly hard texture. This study aimed to determine the optimum weight and contact time for the candlenut activated carbon which can absorb lead metal in used oil. Analysis of lead levels was carried out using atomic absorption spectropometry (AAS). Determination of the optimum weight and contact time of activated charcoal was carried out on various weight of 3 g, 6 g, and 9 g, as well as various times of 1, 2, and 3 hours, respectively. The results show that the optimum weight and contact time of activated charcoal are 9 g for 3 h with the percentage of lead concentration absorbed of 90.716%.

Copigmentation of Flavonoids of the Gadung Mango Bark (Mangifera Sp) as a Coloring Substance Moh. Sahril; Vanny M. A. Tiwow; Afadil Afadil
Jurnal Akademika Kimia Vol. 10 No. 4 (2021)
Publisher : Universitas Tadulako

Flavonoids are pigments in the gadung mango bark that produce a yellow color. The research on copigmentation of flavonoids from gadung mango bark (Mangifera sp) as coloring agents was carried out by the maceration method using 96% ethanol. The extract obtained was concentrated using a vacuum rotary evaporator at 40 oC. The study aimed to determine levels of flavonoids and stability of color gadung mango bark on the inner and outer of the result copigmentation as a coloring agent. Measurement of total flavonoid levels at a wavelength of 520 nm and 700 nm using UV-Vis spectrophotometry. The results of this study indicate that the total flavonoids levels in the inner and outer gadung mango bark samples were 0.162 mg/g and 0.359 mg/g, respectively. The color stability of flavonoids of the gadung mango bark inside and outside as the results of copigmentation was stable at the temperature 35 oC and the results obtained in the color stability test of the hero cloth through washing soap water was with a 0 day in 5 hours.

Co-Authors Adrianton A. Afadil Agreistin E. Peole Alfiani Alfiani Angriani, Eva Baharuddin Hamzah Baharuddin Hamzah Burhan Burhan, Burhan Dhamayanti, Noviasri Diah, Anang Wahid M. Enny Adelina Fajaryanti, Desi Eka Fatma Dhafir Fatmah Dhafir Febiliyanti, Rezha Hafid, Inda Widiarti Herlina Herlina Hildawianti, Hildawianti Hj. Musdalifah Nurdin I Made Tangkas Iffatunniswah Suhud Indarini Dwi Pursitasari Irna Vidianawati Irwan Irwan Irwan Said Karim, Kaharudin karmila karmila Kasmiati Kasmiati Kasmudin Mustapa Lepongbulan, Winda Lestari Alibasyah Lestari M.P Ali Basyah Marrey Lanuhung Ambomide Mega Silvia Mestawaty Mestawaty Mildha Y. Charin Minarni Rama Jura Minarni Rama Jura Moh. Sahril Nirmala Nirmala Novianti, Muli Nurdin Rahman Paulus Hengky Abram Purnama Ningsih Ramadhan, Sofyan Ramlah Ramlah Ratman Ratman Ratman Ratman Ratman Ratman Rosita Rosita Salsabila, Unik Hanifah Santi Santi Sarjan N. Husain Sarmilah Sarmilah Secsiolita, Raisa Siang Tandi Gonggo Siti Nuryanti Sri M. Sabang Sri Mulyani Sabang Suherman Suherman Suparman Suparman Tahril Tanggebono, Iren S. A. Usia, Mirdawati Wardatul Hanifah Wayan A. K. Mahardika Wayan N. Sugiani Yonathan Banua

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