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All Journal Jurnal Natur Indonesia Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Jurnal Akademika Kimia Mattawang: Jurnal Pengabdian Masyarakat Media Eksakta Jurnal Akademika Kimia Jurnal Banua Oge Tadulako

Tahril

Pendidikan Kimia University Of Tadulako

Author-ID : 206097

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Mathematics Public Health Social Sciences Other

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ANALISIS LOGAM ZINK (Zn) DAN BESI (Fe) AIR SUMUR DI KELURAHAN PANTOLOAN KECAMATAN PALU UTARA Rahayu, Budi; Napitupulu, Mery; Tahril, Tahril
Jurnal Akademika Kimia Vol 2, No 1 (2013)
Publisher : Universitas Tadulako

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A study is carried out to determine the metal content of zinc (Zn) and iron (Fe) in well water samples by AAS using a wet method of destruction through the addition of concentrated HNO3 as a solvent and forming acidic. The measuring the levels of zinc in the sample performed at a wavelength (Î») = 213 nm and measuring the levels of iron in the sample performed at a wavelength (Î») = 248.3 nm. The results obtained for the levels of zinc metal respectively are 0.3121 mg/L, 0.1175 mg/L, and 0.0478 mg/L, and iron metal levels are 0.394 mg/L, 0.546 mg/L, and 0.324 mg/L. These data indicate the metal content of zinc in wells water Pantoloan Village North Palu Palu district is still below the threshold value while the metal content of iron in wells near the sea (sampel B) is above the standard threshold value defined in the Rules of Ministry of Health Decree No. 492 /2010.

ANALISIS LOGAM TIMBAL (Pb) DAN BESI (Fe) DALAM AIR LAUT DI WILAYAH PESISIR PELABUHAN FERRY TAIPA KECAMATAN PALU UTARA (The Analysis of Lead (Pb) and Iron (Fe) Metals in The Sea Water of Coastal Area of Taipaâ€™s Ferry Harbor Subdistrict of North Palu) Ika, Ika; Tahril, Tahril; Said, Irwan
Jurnal Akademika Kimia Vol 1, No 4 (2012)
Publisher : Universitas Tadulako

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The analysis of lead (Pb) and iron (Fe) have been done in Taipaâ€™s sea water. The objective is to determine the level of lead and iron metals using spectrophtometry method. The sea water samples were taken in the morning and afternoon at three different places. The distance of 3 samples are approximately 5 m, 10 m, and 15 m from the harbour and about 5 m from the seashore. The result of the analysis level of lead and iron metals from 3 points for lead taken in the morning, point A is 0.919 mg/L, point B is 0.703 mg/L, and point C is 0.810 mg/L. While, taken in the afternoon, the lead level point A is 0.729 mg/L, point B is 0.837 mg/L, and point C is 0.729 mg/L. For the iron level taken in the morning, point A is 0.394 mg/L, point B is 0.546 mg/L, and point C is 0.324 mg/L. Meanwhile, in the afternoon the iron level, point A is 0.449 mg/L, point B is 0.365 mg/L, and point C is 0.504 mg/L. The concentration of lead metal in the sea water is in range 0.703 mg/L â€“ 0.919 mg/L. The concentration is higher than limit ranges value of lead metal 0.025 mg/L. The concentration of iron metal in the sea water of Taipaâ€™s harbor is about 0.324 mg/L â€“ 0.546 mg/L. Itâ€™s concentration is higher than limit for value iron metal 0.01 mg/L.

Analisis Besi dalam Ekosistem Lamun dan Hubungannya dengan Sifat Fisikokimia Perairan Pantai Kabupaten Donggala Tahril, Tahril; Taba, Paulina; Nafie, Nursiah La; Noor, Alfian
Jurnal Natur Indonesia Vol 13, No 2 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

The objectives of the study are to describe the iron content of seagrass area ecosystem and its relation with nature of physico-chemical territorial water. The sampling of seagrass was conducted in purposive sampling technique for every status of the field and performed in three spots of the seagrass ecosystem region with reference to the depth of water and the current direction. Based on statistical tests of factorial and variance analysis indicate that the quality of physico-chemical territorial water in the coastal region of Donggala regency still very good, relatively. The result also showed, The Demand Oxygen and the turbidity gave a positive effect to Fe- seagrass improvement in its various association. Besides, the limiting factor for the low of Fe-seagrass is the height of salinity and water temperature. If the results were combined with another micro and macro mineral analysis will to become the basic for estimating the status of seagrass fertility.

PEMANFAATAN MINYAK DAUN CENGKEH (SYZYGIUM AROMATCUM L.) UNTUK PENGAWETAN IKAN Winarsyih Muhidin; Tahril Tahril
Media Eksakta Vol 16 No 2 (2020)
Publisher : Universitas Tadulako

This study aimed to examine the effect of clove leaf oil on the preservation of skipjack tuna fish. This research was conducted with variations in concentration and duration of storage. Analysis of the number of microbes was determined using the Pour method (pour plate), the organoleptic analysis used a test of the level of preference for color, aroma, texture, and taste. Analysis of protein levels used a Uv- Vis spectrophotometer and analysis of fat content used the Soxletation method.

Analisis Kandungan Sulfur pada Air Panas di Kaki Gunung Desa Sedoa Kecamatan Lore Utara Kabupaten Poso Meilan Kristina Pogoa; Tahril Tahril
Media Eksakta Vol 17 No 2 (2021)
Publisher : Universitas Tadulako

Research on the Sulfur Content Analysis in the Hot Springs at the Foot of the mountain in Sedoa Village, North Lore District, Poso Regency has been conducted. The purpose of this study was to determine the sulfur content in the hot springs at the foot of the mountain in Sedoa Village, North Lore District, Poso Regency. The method used is the Gravimetric method. Hot water samples were taken in the morning and allowed to stand for 3 hours, 1 day, 2 days, and 3 days with 3 different sampling points. Point A is hot water consumed by the community, points B and C are hot water used by the community for bathing and washing. The results showed that the sulfur content of sample A for 3 hours was 9 mg/L, sample B was 4.5 mh/L, sample C was 4.5 mg/L. For 1 day, sample A was 4.5 mg/L, sample B was 4.5 mg/L, sample C was 4.5 mg/L. For 2 days, sample A was 4.5 mg/L, sample B was 4.5 mg/L, sample C was 4.5 mg/L. For 3 days, sample A was 4.5 mg/L, sample B was 4.5 mg/L, sample C was 4.5 mg/L. Sulfur content in the hot springs in Sedoa Village ranges from 4.5 mg/L – 9 mg/L. This level is far below the standard sulfur content, which is <400 mg/L.

The Implementation of Mind Mapping on Chemical Bond Learning Assisted by Information Technology towards the Students’ Learning Outcomes in Class X MIA 1 at SMA Negeri 1 Sindue Awanda Awanda; Tahril Tahril; Minarni R. Jura
Jurnal Akademika Kimia Vol. 9 No. 3 (2020)
Publisher : Universitas Tadulako

This study aimed to determine the influence of the implementation of mind mapping on learning of chemical bonding assisted with information technology toward learning outcomes of students in the Class X1 Science at SMA 1 Sindue. This study was a quasi-experiment with non-randomized pretest-posttest control group design. Sampling was based on special consideration (purposive sampling) with a sample of students of class X1 Science as the experimental class and class X2 Science as the control class. The instrument of this study was a test of learning outcomes. Data of the results was tested using statistical analysis of one-party t-test with prerequisite tests of normality and homogeneity tests. The data analysis obtained an average score of learning outcomes in the experimental class was 77.12 and in the control class was 67.6. Based on the hypothesis test with the t-test statistic of two parties obtained tcount of 10.89 and ttable of 1.95 at α 0.05. In this case, H1 was accepted and H0 was rejected because tcount was in the area of H0 rejection. This showed that there were differences in students’ learning outcomes through the implementation of mind mapping and conventional in learning of students in 10th grade at SMA 1 Sindue.

Misconception Reduction by Implementing Contextual Teaching and Learning (CTL) Approach on Salt Hydrolysis Material in Grade XI at SMA 1 Palasa Moh. Raisul; Tahril Tahril; Afadil Afadil
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

Misconception is a conception of someone who is not in accordance with the scientific concept recognized by experts. Student’s who experience misconceptions will make mistakes in understanding concept’s and occur continuously. This study aimed to determine the percentage of reduction of students’ misconception in grade XI SMA 1 Palasa on salt hydrolysis by implementing contextual teaching and learning (CTL) approach. This study was a quantitative descriptive study with the number of samples of 2 classes, that’s Class XI Science A consisted of 22 students, and Class XI Science B consisted of 22 students. The instrument test was a reasoned multiple choice test accompanied by a certainty of response index (CRI) consisting of 20 items. The results showed that the percentages of the average reduction of students’ misconceptions in the class XI science A and in the class XI science B on salt hydrolysis with contextual teaching and learning (CTL) approach were 19.6 and 9.8%, respectively.

Antioxidant Activity Test of Ethanol and Water Extracts of Celery (Apium graveolens L.) Nurmiati Nurmiati; Siti Nuryanti; Tahril Tahril
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

This study aimed to determine the antioxidant activity of ethanol and water extracts of celery (Apium graveolens L.). Antioxidant activity test in this study used DPPH (2,2-diphenyl-1-picrylhydrazine) as a source of free radicals and vitamin C as a positive control. The antioxidant activity of celery extracts was analyzed using a UV-VIS spectrophotometer. Celery powder was extracted by firstly the maceration method using different solvents (ethanol and water) and secondly with the decoction method using water solvents. Celery extract was tested for antioxidant activity with various concentrations of 20, 40, 60, and 80 ppm. The results obtained that water extract (maceration) had a very strong antioxidant power with 23.713 ppm of IC50 values, for ethanol extract (maceration) had a strong antioxidant power with 59.492 ppm of IC50 value, water extract (dekok) had also a very strong antioxidant with 77.446 ppm of IC50 value, and vitamin C had a very strong antioxidant power with 15.631 ppm of an IC50 value. Based on the IC50 value obtained, the water extract by the maceration method was very good to be used as a source of natural antioxidants, because it had a very strong antioxidant activity value which was equivalent to vitamin C.

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.

Application of Inquiry Learning Model with Lesson Study (LS) Pattern on Student Learning Outcomes in Colloid System Material Nur H. Wahyuni; Suherman Suherman; Tahril Tahril
Jurnal Akademika Kimia Vol. 10 No. 2 (2021)
Publisher : Universitas Tadulako

This study aimed to know the effect of applying the inquiry learning model with lesson study (LS) pattern on student learning outcomes in colloid system material in class XI SMA Negeri 1 Sigi. This type of research was a quasi-experiment with an equivalent post-test design. Samples were determined by the purposive sampling method. The sample used in this study was students of class XI MIA 3 as an experimental class with 24 students and XI MIA 4 students as a control class with 20 students. The processing of student learning outcomes data used a non-parametric analysis of the Mann-Whitney U-Test test. The results showed that the mean value of the experimental class was higher than the control class, which was 23.98>15.82. Results of statistical analysis sig. 2-tailed was (0.019) <0.05 and Zcalculation (-2.336) < Ztable (-1.96), based on decision-making criteria, it stated if the value of -Zcalculation<Ztable then H0 is rejected. Therefore, it can be concluded that there is the effect of applying the inquiry learning model with lesson study (LS) pattern on student learning outcomes in colloid system material in class XI SMA Negeri 1 Sigi.

Co-Authors Afadil Alfian Noor Alfian Noor Arwansyah Arwansyah Awanda Awanda Budi Rahayu, Budi Catherina Bijang Daud Karel Walanda Dewi Sri Elsa RN Taminggu Ika ika Imran Imran Irwan Irwan Kasmiati Kasmiati La O. Ahmad Laode A. Kadir Matheis F. J. D. P. Tanasale Meilan Kristina Pogoa Mery Napitupulu Minarni Rama Jura Moh. Raisul Muh Natsir Nasriadi Dali Wela Nohong Nohong Nur H. Wahyuni Nurmiati Nurmiati Nursiah La Nafie Nursiah La Nafie Paulina Taba Paulina Taba Reynaldi Tandi Siti Nuryanti Sitti Aminah Sri Hastuti Sri Mulyani Sri Mulyani Sabang Sri Mulyani Sabang Suherman Suherman THAMRIN AZIS Ulfa H. Syam Ulfiana Ulfiana Vanny M. A Tiwow Winarsyih Muhidin Yulvani Toiba

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