Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

1.734

P-Index

This Author published in this journals

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

Author-ID : 1488479

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Health Professions Mathematics Medicine & Pharmacology Physics Public Health Other

Published : 40 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4

Penentuan Kadar Natrium (Na) dan Kalsium (Ca) Pada Air Laut Desa Posona Burhan Burhan; Suherman Suherman; Paulus Hengky Abram
Media Eksakta Vol 17 No 1 (2021)
Publisher : Universitas Tadulako

It has been done a study on the determination of sodium (Na) and calcium (Ca) levels in seawater at Posona Village. The aims of this study were to determine the levels of sodium (Na) and calcium (Ca) in seawater in Posona village. The tools used were an atomic absorption spectrophotometer (AAS) and a flame photometer. Seawater samples were taken in the morning and afternoon in 3 distance points: 50 meters, 100 meters, and 150 meters from the edge of the land surface of the seashore. The level of sodium (Na) was measured at wavelengths of 589 nm while calcium (Ca) at a wavelength of 422.7 nm. The results of the study obtained the sodium levels in the morning samples with a distance of 50 m, 100 m, and 150 m amounted of 18.076 mg/L, 18.395 mg/L, and 18.715 mg/L. While the afternoon samples for the sodium (Na) levels was 18.475 mg/L, 18.742 mg/L, and 18.249 mg/L, respectively. The results of the analysis of calcium levels in the morning samples were 8.431 mg/L, 8.8 mg/L, and 7.661 mg/L, whereas in the afternoon for calcium (Ca) levels were 9.415 mg/L, 9.231 mg/L, and 7.692 mg L, respectively.

Lead Metal Adsorption from its Solution using Seagrass Biomass Enhalus Acoroides Siti Masita; Irwan Said; Suherman Suherman
Jurnal Akademika Kimia Vol. 9 No. 3 (2020)
Publisher : Universitas Tadulako

Seagrass is one of the macrophyta plants containing enough biomass. Recently, seagrass has been used for filtering waste, drugs and sources of chemicals. Seagrass also functions to stabilize the soft bases where most species grow, especially with solid root systems and cross each other. Therefore, seagrass has the potential to absorb heavy metal ions from the solution. This research aimed to determine the optimum weight and optimum contact time for Pb metal adsorption. Weight variation of seagrass biomass was 60, 90, and 120 mg while variation in contact time was 60, 90, and 120 minutes. The results obtained optimum weight of seagrass biomass to absorb Pb metal was 60 mg with 98.42% Pb absorbed, and optimum contact time for seagrass biomass to absorb Pb metal was 60 minutes with 95.45% Pb absorbed.

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 Implementation of Demonstration Method to Students Learning Outcomes and Interests on Colloid Materials at Class XI Science of SMA Negeri 1 Kasimbar Megawati Megawati; Suherman Suherman; Purnama Ningsih
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

This research aims to examine the demonstration method on chemistry learning through colloid materials to learning achievement and interest of students at class XI Science of SMA Negeri 1 Kasimbar. This research was a true experimental design with pretest-posttest control group design. Sampling was carried out based on special considerations (purposive sampling) with 21 students in class XI science 2 as a sample of experimental class and 21 students of class XI science 1 as control class. This research instruments were a learning achievement test and questionnaire. Data was analyzed through descriptive statistical analysis, namely test questionnaire data, as well as inferential statistical analysis to test the hypothesis using two-party t-test. Analysis of questionnaire data of students’ learning interests showed that the experimental class was in the agree to category with a percentage of 78.05% while the control class was in the agree category with a percentage of 60.63%. Therefore, it can be concluded that the demonstration method in chemistry learning on colloidal material affects the learning achievement learning interest of students class XI Science of SMA Negeri 1 Kasimbar.

Analysis of Student Conception of Atomic Structure at the State SMA in Palu Gavrila Gavrila; Suherman Suherman
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

This study aimed to analyze student’s knowledge (percent) for who know concept (KC), misconception (MC), and do not know concept (DKC) on the subject of atomic structure at the state SMA in Palu. The sample of this study were students of SMAN Model Terpadu Madani, SMAN 3, and SMAN 9. Data were obtained through tracer tests of students’ conception in the form of multiple-choice consisted of 20 items accompanied by CRI (Certainty of Response Index) which was given to students to determine students' conceptions. Results of the study showed that the percentage of KC, MC, and DKC at SMAN Madani Model Palu were 65.6, 11.3, and 23.2% respectively, while at SMAN 3 Palu were 46.0, 15.1, and 38.9% respectively, and at SMAN 9 Palu were 5.9, 72.6, and 21.5% respectively.

Flower Extracts of Cage Plants (Canavalia virosa) as an Indicator of Acid Base Andi M. Rendi; Supriadi Supriadi; Suherman Suherman
Jurnal Akademika Kimia Vol. 9 No. 4 (2020)
Publisher : Universitas Tadulako

Cage plants (Canavalia virosa) are classified as nuts. This study aims to prove the flowers of the cage plants as acid-base indicators and determine the type of acid-base titration that is suitable for indicators of cage plants. The flowers of the cage plants were macerated with ethanol. Extras were tested as indicators in acid-base solutions, buffer solutions, and compared with phenolphthalein and methyl orange for acid-base titration, namely: strong acid with a strong base, a weak acid with a strong base, and weak base with strong acid. The results obtained in this study, namely: flower extracts of cage plants in strong red acid, in weak acid pink, in strong green bases, and weak bases in light green. In a buffer solution of pH 1 to pH 11, the flower extract of the cage plants gives 4 color groups, namely: a buffer solution with pH 1 colored red, pH 3 colored pink, pH 5 to pH 9 being light green, and pH 11 being dark blue. Cage plant flower extract can be used as an indicator of acid-base, cage plant flower extract can be used on strong-base strong acid titration, strong weak-acid base, and weak-strong base acid titration.

The Effect of Practical Learning on Creative Thinking Skills of High School Students on Acid-Base Sayid Z. S. Alwi; Suherman Suherman
Jurnal Akademika Kimia Vol. 9 No. 4 (2020)
Publisher : Universitas Tadulako

This study aims to determine the effect of practical learning on the creative thinking skills of class XI students on acid-base material at SMAN 7 Palu. This type of research was a quasi-experimental research with equivalent control group design. Sampling in this study was a purposive random sampling technique. The sample consisted of two classes students in XI MIA 2 as the experimental class (n = 24) and students in class XI MIA 4 as the control class (n = 24). Data from students' creative thinking using the one-party hypothesis testing, the right side were in this study used the statistics application and obtained sig. (2-tailed) 0,000 data based on this decision, the hypothesis is accepted if the sig (2-tailed) value is smaller than 0.05 so that it can be concluded that there is a positive effect using practical learning on the creative thinking ability of class XI students on acid-base material at SMAN 7 Palu.

The Analysis of the Honesty and Responsibility Characters of Chemistry Education Study Program Students on Examinations Suherman Suherman; Sitti Rahmawati; Kasmudin Mustapa; Detris Poba; Nur Azizah
Jurnal Akademika Kimia Vol. 10 No. 3 (2021)
Publisher : Universitas Tadulako

Honesty and responsibility should be a principle held by students. But, there are still problems of dishonesty and irresponsibility of students during exams. This study aimed to analyze the honesty and responsibility character of chemistry students during exams. The research samples were 39 students. Data were collected by observation and interviews technique, by using observation and questionnaires sheets. Data were analyzed by using descriptive statistics. The results showed that the honesty and responsibility of chemistry students were in the sufficient category where the percentage of honesty and responsibility of students based on the observation sheets was 43.6% and 49%, respectively. While the questionnaire responsibility students were 46.2% and 43.6%, respectively.

Application of Discovery Learning Model to Improve the Understanding Concept of High School Students on Buffer Topic Nurfauzia Nurfauzia; Ijirana Ijirana; Suherman Suherman
Jurnal Akademika Kimia Vol. 10 No. 1 (2021)
Publisher : Universitas Tadulako

This study aimed to describe the increase in understanding of students in class XI SMA 7 Palu on the buffer solution material after applying the discovery learning model. This type of research was pre-experiment with the design of one group pre-test-post-test. This study was conducted in two replication classes, namely, class XI MIA 1 as replication class 1 (n = 26) and class XI MIA as replication class 2 (n = 24). Testing of the data from research results data used descriptive statistical analysis of the understanding concept. The criteria for understanding the concept was good if the percentage of students who have the category of moderate, high, and very high is not less than 60%. The data results of analysis understanding of each concept obtained in the replication class 1. The concept of buffer, score 65. 38% increased to 96.15%. The concept of the properties of the buffer score 3.84% increased to 96.15%. The concept of acid-base buffer solution, score 0% increased to 92.3%. The concept of pH acid buffer, score 0% increased to 88.46%. The concept of pH base buffer, score 0% increased to 84.61%. In replication class 2, the concept of buffer solution score is 20.83%, increased to 91.66%. The concept of acid and base buffer solution, score 12.5% increased to 91.66%. The concept of pH base buffer, score 4.16% increased to 83.33%. The results of the analysis showed that there is an increase in understanding the good concept by applying the discovery learning model in the buffer material.

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 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

Title

Found 40 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 40 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 40 Documents
Search