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All Journal Jurnal Pendidikan Kimia Indonesia AKADEMIKA Elkawnie Chemistry Indonesian Journal of Chemical Research Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia AR-RAZI Jurnal Ilmiah Jambura Journal of Educational Chemistry Jambura Journal of Chemistry Journal Syifa Sciences and Clinical Research (JSSCR) JCER (Journal of Chemistry Education Research) Acta Chimica Asiana Jurnal Sibermas (Sinergi Pemberdayaan Masyarakat) Hydrogen: Jurnal Kependidikan Kimia Indonesian Journal of Pharmaceutical Education JURNAL KIMIA SAINTEK DAN PENDIDIKAN Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Molekul: Jurnal Ilmiah Kimia Jurnal Sains dan Kesehatan
Jafar La Kilo
Unversitas Negeri Gorontalo
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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Iron in Well Water: Case Study in Dulalowo and Heledulaa Districts Hendri Iyabu; Anita Muhammad; Jafar La Kilo; Akram La Kilo
Jambura Journal of Chemistry Vol 2, No 2 (2020): August
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jambchem.v2i2.6990

Abstract

This study aims to determine the iron content of water wells in Dulalowo and Heledulaa, Gorontalo City. Ten well water samples were taken randomly from five different wells in each district. Water samples at each well consist of top, middle, and bottom water. Determination of iron level using Atomic Absorption Spectrophotometer (AAS) at a wavelength of 248.33 nm. The results showed that the iron concentration of well water in Dulalowo was 0.030 (D1), 0.265 (D2), 0.224 (D3), 0.158 (D4), 0.149 ppm (D5). Meanwhile, iron levels in Heledulaa were 0.100 (H1), 0.039 (H2), 0.159 (H3), 0.198 (H4), and 0.235 ppm (H5). These results prove that the Fe content in the well water in the two districts is still fulfil the drinking water standard which is a maximum of 0.3 mg/L iron.
Pengaruh Keterampilan Proses Sains Melalui Model Inkuiri Terbimbing terhadap Hasil Belajar Siswa pada Materi Larutan Asam Basa Netty Ino Ischak; Eka Anggraini Odja; Jafar La Kilo; Akram La Kilo
Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 2 (2020): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (700.554 KB) | DOI: 10.33394/hjkk.v8i2.2748

Abstract

Chemistry learning has so far emphasized macroscopic and symbolic aspects as a result of misconceptions and students' low understanding of chemistry. This study aims to determine the influence of science process skill through guided inquiry model on student learning outcomes on acidic-basicsolution topic. The type of research is experimental research with Posttest-Only Control Design. Sampling was done by using Purposive Sampling technique. The sample of research for the experimental class and control class were 31 students, respectively. Data collection using objective test as an instrument that contains test about acidic acid material. Data analysis technique used to test the research hypothesis is t-test. Based on the statistical results obtained the average value of post-test experimental class is 58.55 while for the control class the average post-test value is 39.68. Result of data analysis for learning result show that in significant level 0,05 obtained tcount> t table  (6,22> 1,671),  then H0 rejected or accepted H1. Thus it can be concluded that there is the influence of process skills of science through guided inquiry model on student learning outcomes on acidic acid solution materials.The positive effects are also discussed in this study.
KEMAMPUAN SISWA MEMECAHKAN MASALAH HUKUM-HUKUM DASAR KIMIA MELALUI PEMBELAJARAN INKUIRI TERBIMBING Lukman A.R. Laliyo; Mian Kau; Jafar La Kilo; Akram La Kilo
Jurnal Ilmiah Ar-Razi Vol 8, No 1 (2020): JURNAL ILMIAH AR-RAZI
Publisher : Universitas Muhammadiyah Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/ar-r.v8i1.1875

Abstract

The purpose of research was to determine the problem solving skill of basic chemical laws at tenth-grade senior high school of  through the application of guided inquiry learning models. The ability is known through a three tier multiple choice diagnostic test. This research was an experimental quasi with pretest-posttest control group design. The  sample consisted of 107 students consisting of 56 experimental class  and 51 control class. Based on the results of the calculation of the F test that F count> F table (10.72> 3.93) with α = 0.05. This means that there was an influence of the application of the guided inquiry learning model to students' ability to solve problems in the basic laws of chemistry. 70.71% of students in the experimental class can understand the problem, plan the solution, carry out the solution, and re-examine the results of the problem solving. Meanwhile, control class students were unable to solve very high problems, namely 24.5% students..
Learning Media Design based on Traditional Game of Tumbu-Tumbu Belanga (T2B) on Salt Hydrolysis Topic Julhim S. Tangio; Rusmiyati Patilima; Jafar La Kilo; Akram La Kilo
JCER (Journal of Chemistry Education Research) Vol. 5 No. 1 (2021): Volume 5 No. 1 June 2021
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v5n1.p32-40

Abstract

This research aimed to test the validity of the feasibility of traditional game learning media on salt hydrolysis. This research was development research (R&D) with a qualitative descriptive approach. This research uses the ADDIE model development design, which consists of 5 (five) stages, namely (1) analysis, (2) design, (3) development, (4) implementation, and (5) evaluation. Data collection techniques in this study used a validation sheet for the assessment of the feasibility of tumbu-tumbu  learning media. The tumbu-tumbu  learning media validation wass assessed by 4 expert validators, namely 2 chemistry lecturers of State University of Gorontalo material experts, 1 media expert lecturer, and 1 high school chemistry teacher. The results of the validation of tumbu-tumbu  learning media development obtained an average percentage 0f 89.40%, which was categorized in very feasible criteria. Therefore, the tumbu-tumbu  learning media are highly usable in the learning process of salt hydrolysis.
Evaluasi Kemampuan Tabir Surya Ekstrak Biji Jagung (Zea mays L.) Secara In Vitro Menggunakan Metode Spektrofotometri UV-Vis Muhammad Taupik; Wiwin R. kunusa; Jafar La Kilo; A. Mu’thi Andy Suryadi; Zul Fikar Ahmad
Journal Syifa Sciences and Clinical Research Vol 4, No 1 (2022): Volume 4 Edisi 1 2022
Publisher : State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37311/jsscr.v4i1.14314

Abstract

Corn kernels (Zea mays L.) are plants serving as a natural sunscreen due to the presence of phenol and flavonoid compounds. The sunscreen compounds are able to protect skin from the effect of ultraviolet ray emitted by the sun. The purpose of this study was to determine the activity of corn kernels (Zea mays L.) as a in vitro sunscreen by the UV-Vis spectrophotometry method. The study was started by maceration of extracted seed samples using three various solvents, i.e., hexane, ethyl acetate and ethanol 70%. In the preliminary test, it was found that 70% positive ethyl acetate and ethanol extract contained phenol and flavonoid compounds, so that the step proceeded to the sunscreen activity test. The sunscreen activity test was determined based on the value of sun protecting factory value tested at wavelengths from 290 to 320 nm, the percentage of erythema transmission (% Te), and the percentage of pigmentation transmission (%Tp) values tested at wavelengths of 292.5-372.5 nm at 5 nm intervals. From these tests, the results revealed that the best activity was indicated by a concentration of 600 ppm for ethyl acetate extract and 70% ethanol with an average SPF value of 24.1724.18 ± 0.0852 (ultra protection) and 10.23 ± 0.021 (maximum protection). Te% of ethyl acetate and ethanol extract 70% were 3.92 ± 0.015 (extra protection) and .62 ± 0.026 (regular syringe), respectively. % Tp in 70% ethyl acetate and ethanol extract gets 19.61 ± 0.527 (total block) and 32.66 ± 2,594 (total block), respectively. The statistical analysis revealed that the normality and homogeneity test of significance value 0.05, meaning that the data distribution was not normal and homogeneous. By that, the step continued to the Kruskal-Wallis test. Based on the Kruskal-Wallis test, the significance value 0.05 showed that the significant differences in the ethanol and ethyl acetate samples per concentration with the SPF,% Te and% Tp values obtained was significant.
Pengembangan Rumah Ikan untuk Mewujudkan Desa Sehat, Sejahtera dan Bebas Narkoba Jafar La Kilo; Muhammad Taupik
Jurnal Sibermas (Sinergi Pemberdayaan Masyarakat) Vol 11, No 3 (2022): Jurnal Sibermas (Sinergi Bersama Masyarakat)
Publisher : Univeristas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/sibermas.v11i3.12230

Abstract

Drug abuse will have a negative impact on a person's life or future, physically, psychologically and socially. Physically it will cause disturbances in the nervous system, disorders of the heart and blood vessels, skin disorders and disorders of the lungs. Psychologically, it causes sluggishness in work, often tense and anxious, loses confidence, becomes violent and has brutal behavior, has difficulty concentrating, tends to hurt oneself, feels insecure, and even commits suicide. The social impacts that may occur include mental disorders, anti-social and immoral, ostracized by the environment, troublesome and a burden on the family, disrupted education and a bleak future. Seeing the magnitude of the impact caused by drugs, a good and accurate solution is needed, especially in the coastal villages of Tomini Bay (including Tobango District). It takes strong resilience from the apparatus and village communities to tackle the drug problem. through the Development of the Anti-Drug Cadre Inspiration House (FISH) to Realize the Village's Sustainable Development Goals (SDGs) point 3, namely Healthy, Prosperous, and Drug-Free Villages.
QSAR and Ab Initio studies of quinolon-4(1H)-imine derivatives as antimalarial agents Jafar La Kilo; Akram La Kilo; Saprini Hamdiani
Acta Chimica Asiana Vol. 4 No. 1 (2021)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v4i1.39

Abstract

Malaria is still the most dangerous disease threat in the world, including in Indonesia. In Indonesia, it is estimated that there are 20 million cases of malaria per year. Malaria resistance to conventional drugs requires the search for new antimalarial drugs. Molecular modeling can be a solution to these problems. An activity study of 22 quinolone-4 (1H) -imine derivatives as antimalarials was carried out using the QSAR Quantitative Structure-Activity Relationship method. The electronic and molecular descriptors were obtained from the Hartree-Fock HF / 6-31G ab initio calculation. The multiple linear regression (MLR) method was used to construct the QSAR model. The best QSAR models produced are: pEC50 = -4,177 + (37,902 x qC3) + (171,282 x qC8) + (9,061 x qC10) + (125,818 x qC11) + (-149,125 x qC17) + (191,623 x qC18), with statistical parameters, n = 22; r2 = 0,910; SEE = 0,171; Fhit/Ftab = 4,510 dan PRESS = 0,697. The best QSAR equation model can be used as a reference for designing and predicting the antimalarial activity of Quinolon-4 (1H) -imine derivatives which have higher activity than the previous one
Stability Study of Four Layer Aurivillius Oxide of AxBi4-xTi4O15 (A = Ca, Sr, Ba): Atomistic Simulation Akram La Kilo; La Alio; La Ode Aman; Jafar La Kilo
Acta Chimica Asiana Vol. 3 No. 2 (2020)
Publisher : Chemistry Education Program, the University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v3i2.42

Abstract

Aurivillius is bismuth layered structure ferroelectrics that can be applied as memory, sensor, and catalyst. This research aimed to study the stability of AxBi4-xTi4O15 Aurivillius (A = Ca, Sr, and Ba). Dopants (A) partially substitute Bi at the sites of Bi(1) and Bi(2) of the perovskite layer. This research method is an atomistic simulation using by the GULP code. Simulations were carried out by means of AxBi4-xTi4O15 geometry optimization at constant pressure, using the Buckingham potential. The results showed that the increase in the concentration of dopants substituting Bi accompanied by an increase in lattice energies. The most stable Aurivillius was CaxBi4-xTi4O15 (x = 16.3%) carried out by Bi substitution at Bi(2) site, with lattice energy, -1668.227 eV. Aurivillius stability decreases by increasing the size of the dopant. The maximum concentration number of A dopant substituting Bi was discussed.
Lead Metal in Water and Sediment: A Case Study of Rumbia River Deasy Natalia Botutihe; Sri Wanti Sappe; Ahmad Kadir Kilo; Jafar La Kilo; Akram La Kilo
Acta Chimica Asiana Vol. 4 No. 1 (2021)
Publisher : The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v4i1.45

Abstract

The purpose of this study was to determine and analyze the levels of leadcontained in the water and sediments of the Rumbia River. This research was conducted in a quantitative manner. Lead levels were measured using Atomic Absorption Spectrophotometer (SSA) of Simatzu AA 500. The results showed that the leadcontent in Rumbia River water for point A1 was undetectable whereas point 2 and 3 were 0.001 mg/kg. In sediments, at point A1 is 1.8 mg/kg and at points 2 and 3 were 0.9 mg/kg. The level of Pb in Rumbia River water is still below the water quality standard limit for marine biota determined by the Ministry of Environment No. 51 of 2004. Similarly, lead levels in sediments are below the threshold standard for sediment quality based on sediment quality guidelines for metals and associated levels of concern to be used in doing assessments of sediment quality. In general, it can be said that the concentration of lead in the Rumbia River is still at a harmless level. However, socio-economic conditions that continue to change over time can cause changes in the level of water pollution. So there needs to be an effort and public awareness in maintaining the occurrence of increased levels of pollutants in the Rumbia River.
Identifikasi Senyawa Metabolit Sekunder Daun Spigelia anthelmia L. dan Uji Aktifitas Antioksidan Menggunakan Metode DPPH (1,1-Diphenyl-2-Picrylhidrazy) Muhammad Taupik; A. Mu’thi Andy Suryadi; Jafar La Kilo; Wiwit Zuriati Uno; Samsul Bahri Badjeber
Journal Syifa Sciences and Clinical Research Vol 4, No 3 (2022): Volume 4 Edisi 3 2022
Publisher : State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37311/jsscr.v4i3.15927

Abstract

Spigelia anthelmia is a type of weed plant that is classified as toxic and is included in the list of herb of medicine. The research aims to determine the secondary metabolite content of Spigelia anthelmia L. leaves extract and antioxidant activity test using the DPPH (1,1-Diphenyl-2-Picrylhydrazy) method. The research samples are extracted by applying the total maceration method with methanol as a solvent and followed by partition method using n-hexane, ethyl acetate, and methanol as solvents. The identification of flavonoid compounds content is performed by employing Thin Layer Chromatography method with methanol as eluent: n-hexane (1:4), ethyl acetate:n-hexane (4:1), ethyl acetate:n-hexane (4:1). Meanwhile, the antioxidant activity test is performed by employing UV-Vis Spectrophotometry method. The result of identification by thin layer chromatography using AlCl3 spray reagent, Lieberman Burchard. Dragendrof, and cerium sulfate, indicate that the Spigelia anthelmia L. leaves extract contains alkaloids, flavonoids, and terpenoids. In addition, the antioxidant activity test of Spigelia anthelmia L. leaves extract is carried out at wavelength of UV 516 nm with an absorbance value of 0,654 A. with a linear equation of y = 0,027 x – 42,83 with a correlation coefficient (R2) = 0,0983 and has the strongest IC50 at the methanol fraction for 7,69 µg/ml.
Co-Authors A. Mu’thi Andy Suryadi A. Mu’thi Andy Suryadi A. Mu’thi Andy Suryadi Adam Mustapa, Muhammad Ahmad Kadir Kilo Akram La Kilo Alberto Costanzo Andi Makkulawu Andimala, Febriyanti Anita Muhammad Annisa Untuba Annisa, Viviane Arviani Arviani Bumulo, Nuraini Christopel, Nelpiani Christopel, Nelpiani Damayanti, Elok Dandi Saputra Halidi Daniele Mazza Deasy N Botutihe Deasy Natalia Botutihe Dilapanga, Harsya Wiriawan Eka Anggraini Odja Endah Nurrohwinta Djuwarno Erni Mohamad Hendri Iyabu Ibrahim, Indriyanti Ishak Isa Julhim S Tangio Kupang, Sri Revayana La Alio La Ode Aman Lukman A. R. Laliyo Mangara Sihaloho Mantuli, Mohamad Alan Mardjan Paputungan Mian Kau Muhamad Handoyo Sahumena Muhammad Taupik Muhammad Taupik Muhammad Taupik Naim, Fitria Najmah, Najmah Nelpiani Christopel Netty Ino Ischak Nita Suleman Nurhayati Bialangi Opir Rumape Padi, Maryam Patilima, Rusmiyati Rahmawati Hilala Ramona Nintias R. Abas Riskah Fitriani Adam Rusmiyati Patilima Sabihi, Ismail Samsul Bahri Badjeber Saprini Hamdiani Sri Wanti Sappe Weny J.A. Musa Wiwin Rewini Kunusa Wiwit Zuriati Uno Yuszda K Salimi Zainudin, Farnawaty Zulfikar Ahmad