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Pengaruh Inkuiri Terbimbing Berbantuan Multimedia Interaktif Terhadap Kemampuan Kognitif Siswa Pada Materi Larutan Penyangga dan Sistem Koloid Aprilia Novira Sodayang; Sonny Lumingkewas
Oxygenius Journal Of Chemistry Education Vol 3 No 2 (2021): Oxygenius: Journal of Chemistry Education
Publisher : Chemistry Department, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/ojce.v3i2.278

Guided inquiry learning model is a student centered learning model, namely stundents formulate problems, design experiments, collect and analyze data to make their own decision. In the study the guided inquiry learning model combined with iteractive multimedia, interactive multimedia is a fun and learning medium that supports educational development and plays an important role in chemical learnig activities which are still abstract in nature. This study aims to determine how the cognitive abilities of students after learning with guided inquiry assisted by interactive multimedia at SMA Negeri 1 kakas in the 2019/2020 school year. The population in this study was class XI IPA and the sample taken was class XI IPA 1 with a total of 25 students. The research instrument used was a test on students at the end of the lesson. The instrument in this study was a test of students cognitive abilities. Based on data analysis,in the buffer solution material there were 5 out of 25 students who did not reach the KKM standard and on the colloid system material there were 3 out of 25 students who did not reach the KKM standard

Pengaruh model pembelajaran problem based learning terhadap hasil belajar siswa kelas X pada materi struktur atom di SMA katolik santa rosa de lima tondano Chrisly Durant; Emma Juline Pongoh; Sonny Lumingkewas
Oxygenius Journal Of Chemistry Education Vol 1 No 1 (2019): Oxygenius : Journal of Chemistry Education
Publisher : Chemistry Department, Universitas Negeri Manado

Problem Based Learning model is a problem-based learning model that exposes students to practical problems to be solved that focus on the final results. The purpose of this study is to find out whether the Problem Based Learning learning model on atomic structure material is better than conventional learning models. The population in this study were all class X students of Santa Rosa de Lima Tondano Catholic High School. The sample of this study was class XA and class XB Catholic School Santa Rosa de Lima Tondano with the number of students 30 people, for the experimental class 15 people and the control class 15 people, in the even semester the academic year 2018/2019.Hypothesis testing uses the t-test to see differences in student learning outcomes between the experimental class and the control class. Based on the results of the study obtained the value of t_count (4.21)> t_table (1.701) at the real level α = 0.05. So that H_0 is rejected and H_1 is accepted. where the average value obtained in the experimental class 82.66 and the average value for the control class 71.33. So the conclusion is that there is a positive effect of the implementation of the Problem Based Learning learning model on atomic structure material on student learning outcomes at Santa Rosa de Lima Tondano Catholic High School.

Penerapan Model Pembelajaran Inkuiri Terbimbing Terhadap Hasil Belajar Siswa Di SMA Negeri 1 Airmadidi Pada Materi Sifat Koligatif Larutan Ilham Mahmud; Sonny Lumingkewas; Joice Caroles
Oxygenius Journal Of Chemistry Education Vol 1 No 2 (2019): Oxygenius : Journal of Chemistry Education
Publisher : Chemistry Department, Universitas Negeri Manado

This research is experimental design was posttest only control group design. Determination of the sample using techniques random sampling and obtained two classes with the number of each class of 33 students. Experimental class 3 XII IPA and 4 XII IPA control class. The research was conducted to find out the result data inquiry learning model on the material colligative solution on the results of class XII student IPA at SMA Negeri 1 Airmadidi. The purpose of this study was to see increase learning outcomes students using inquiry model learning on the material colligative solution. Results of the study were analyzed to test the hypothesis (t test) at α = 0.05 was obtained tcount> ttable ie 3.15 > 1.66 means H1 received and there is a real increase, the result of learning to use inquiry learning model. As well as describing the average ratio of student learning outcomes using the experimental class higher inquiry learning model 80.00, compared with the control class that uses the conventional learning model that is 68.18.

Penerapan model pembelajaran inquiry training dan model pembelajaran kooperatif tipe group investigation berbantuan laboratorium mini pada hasil belajar siswa kimia di SMA I Kadek Cenik; Sonny Lumingkewas; Meiske Naomi Mamuaja
Oxygenius Journal Of Chemistry Education Vol 1 No 1 (2019): Oxygenius : Journal of Chemistry Education
Publisher : Chemistry Department, Universitas Negeri Manado

This study aims to determine whether there are differences in the average student learning outcomes taught with the Inquiry Training learning model and the Group Investigation learning model on electrolyte and non-electrolyte solution material. This research was conducted at SWADHARMA WERDHI AGUNG High School in second semester of 2017/2018. The research method used is the experimental method. Sampling is done by random sampling technique. The sample in this study was class XA students as experimental class I and class XB as experimental class II. Each sample amounted to 20 respondents, and the total number of respondents was 40. Data collection techniques were pretest and posstest and the instruments used to measure learning outcomes were multiple choice tests. Analysis of the posttest data of the two groups used the t test. The results of the research obtained were tcount of 2,233 and t table at a significant level of 0,05 of 2,024, then tcount> ttable. Then H0is rejected and H1is accepted. Thus it was concluded that there were differences in the average learning outcomes of students taught using the Inquiry Training learning model and the Group Investigation learning model.

Pengaruh Penerapan Model Pembelajaran Problem Based Learning Terhadap Hasil Belajar Siswa Materi Konsep Mol Hiskia Wahongan; Sonny Lumingkewas
Oxygenius Journal Of Chemistry Education Vol 4 No 1 (2022): Oxygenius : Journal of Chemistry Education
Publisher : Chemistry Department, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/ojce.v4i1.320

This research is an experimental study of Problem Based Learning model. This study aims to determine the effect of the Problem Based Learning learning model on student learning outcomes on the mole concept material. This research was conducted in class X SMA Negeri 1 Remboken with a total sample of 64 people. The research design used is an experimental method with a quantitative approach and the type of research used is a quasi-experimental research (Quasi Experimental design). The experimental class uses the Problem Based Learning model and the control class uses the conventional learning model. Analysis of hypothesis testing using t-test with a significant level of = 0.05 because, two-way test then the value of a/2 = 0.025. The test results obtained show that the results of tcount > ttable or 9.653 > 1.99897, thus H0 is rejected and H1 is accepted, this indicates that there is a significant difference between the average posttest scores of the experimental group and the control group. So it can be concluded that there is a difference between student learning outcomes using Problem Based Learning) and student learning outcomes using conventional learning models on the mole concept material.

Efisiensi Waktu Pemberian Pupuk Nitrogen terhadap Pertumbuhan dan Produksi Jagung Lokal Kuning Anatje Lihiang; Sonny Lumingkewas
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 9, No 2 (2020): September
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat92182312020

ABSTRAK Jagung (Zea mays L) ialah tanaman serealia yang bernilai ekonomis dan dapat dikembangkan sebagai sumber utama karbohidrat, vitamin dan mineral, serta sebagai pakan ternak dan bahan baku industri. Di Sulawesi Utara banyak dikembangkan jagung varietas lokal Manado kuning yang memiliki keunikan yaitu rasanya manis, rendemen nasi tinggi, dan tahan disimpan. Namun di tingkat petani produktivitasnya rendah berkisar 1-2 ton/ha. Oleh karena itu perlu dilakukan penelitian untuk meningkatkan pertumbuhan dan produksi jagung lokal Manado kuning dengan aplikasi waktu pemberian pupuk urea yang tepat.Hasil menunjukkan tanaman jagung menghasilkan luas daun, berat kering, indeks luas daun, laju tumbuh tanaman, dan laju asimilasi bersih tertinggi pada perlakuan N4 dan N5 yaitu 3 kali pemberian pupuk urea 1/3 saat tanam, 1/3 umur tanaman 15 hari, dan 1/3 umur tanaman 45 HST (N4) serta 1/3 saat tanam, 1/3 saat tanaman berumur 30 hari dan 1/3 tanaman berumur 45 hari. Bobot pipilan kering tertinggi sebesar 3,24 t ha-1 pada perlakuan aplikasi waktu pemberian pupuk 3 kali yaitu 1/3 saat tanam, 1/3 pada saat tanaman berumur 30 HST dan 45 HST. Dengan demikian, aplikasi waktu pemberian pupuk 3 kali menghasilkan pertumbuhan dan produksi jagung lokal Manado kuning tertinggi. Penelitian selanjutnya perlu diuji pada lokasi-lokasi dengan ketinggian berbeda. Kata kunci: Jagung lokal kuning, pupuk urea, efisiensi waktu ABSTRACTCorn (Zea mays L) is a cereal crop that has economic value and can be developed as a main source of carbohydrates, vitamins and minerals, as well as animal feed and industrial raw materials. In North Sulawesi, many local varieties of Manado yellow maize have been developed, which are unique in that they taste sweet, have high rice yield, and are resistant to storage. However, at the farmer level, the productivity is low, around 1-2 tonnes/ha. Therefore it is necessary to conduct research to increase the growth and production of local Manado yellow maize with the appropriate application of urea fertilizer time. The weight, leaf area index, plant growth rate, and net assimilation rate in N4 and N5 treatments, namely 3 times urea fertilizer 1/3 when planting, 1/3 plant age 15 days, and 1/3 plant age 45 HST (N4) and 1/3 when planting, 1/3 when the plants are 30 days old and 1/3 plants are 45 days old. The highest dry weight was 3.24 t ha-1 in the 3 times application of fertilizer, namely 1/3 when planted, 1/3 when the plants were 30 HST and 45 HST. Thus, the application of 3 times fertilizer application resulted in the highest growth and production of local Manado yellow corn. Further research needs to be tested at locations with different heights. Keywords: Yellow local corn, urea fertilizer, time efficiency

Efisiensi Waktu Pemberian Pupuk Nitrogen terhadap Pertumbuhan dan Produksi Jagung Lokal Kuning Anatje Lihiang; Sonny Lumingkewas
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 9, No 2 (2020): September
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat92182312020

ABSTRAK Jagung (Zea mays L) ialah tanaman serealia yang bernilai ekonomis dan dapat dikembangkan sebagai sumber utama karbohidrat, vitamin dan mineral, serta sebagai pakan ternak dan bahan baku industri. Di Sulawesi Utara banyak dikembangkan jagung varietas lokal Manado kuning yang memiliki keunikan yaitu rasanya manis, rendemen nasi tinggi, dan tahan disimpan. Namun di tingkat petani produktivitasnya rendah berkisar 1-2 ton/ha. Oleh karena itu perlu dilakukan penelitian untuk meningkatkan pertumbuhan dan produksi jagung lokal Manado kuning dengan aplikasi waktu pemberian pupuk urea yang tepat.Hasil menunjukkan tanaman jagung menghasilkan luas daun, berat kering, indeks luas daun, laju tumbuh tanaman, dan laju asimilasi bersih tertinggi pada perlakuan N4 dan N5 yaitu 3 kali pemberian pupuk urea 1/3 saat tanam, 1/3 umur tanaman 15 hari, dan 1/3 umur tanaman 45 HST (N4) serta 1/3 saat tanam, 1/3 saat tanaman berumur 30 hari dan 1/3 tanaman berumur 45 hari. Bobot pipilan kering tertinggi sebesar 3,24 t ha-1 pada perlakuan aplikasi waktu pemberian pupuk 3 kali yaitu 1/3 saat tanam, 1/3 pada saat tanaman berumur 30 HST dan 45 HST. Dengan demikian, aplikasi waktu pemberian pupuk 3 kali menghasilkan pertumbuhan dan produksi jagung lokal Manado kuning tertinggi. Penelitian selanjutnya perlu diuji pada lokasi-lokasi dengan ketinggian berbeda. Kata kunci: Jagung lokal kuning, pupuk urea, efisiensi waktu ABSTRACTCorn (Zea mays L) is a cereal crop that has economic value and can be developed as a main source of carbohydrates, vitamins and minerals, as well as animal feed and industrial raw materials. In North Sulawesi, many local varieties of Manado yellow maize have been developed, which are unique in that they taste sweet, have high rice yield, and are resistant to storage. However, at the farmer level, the productivity is low, around 1-2 tonnes/ha. Therefore it is necessary to conduct research to increase the growth and production of local Manado yellow maize with the appropriate application of urea fertilizer time. The weight, leaf area index, plant growth rate, and net assimilation rate in N4 and N5 treatments, namely 3 times urea fertilizer 1/3 when planting, 1/3 plant age 15 days, and 1/3 plant age 45 HST (N4) and 1/3 when planting, 1/3 when the plants are 30 days old and 1/3 plants are 45 days old. The highest dry weight was 3.24 t ha-1 in the 3 times application of fertilizer, namely 1/3 when planted, 1/3 when the plants were 30 HST and 45 HST. Thus, the application of 3 times fertilizer application resulted in the highest growth and production of local Manado yellow corn. Further research needs to be tested at locations with different heights. Keywords: Yellow local corn, urea fertilizer, time efficiency

PEMBUATAN DAN KARAKTERISASI KARBON AKTIF DARI ARANG TEMPURUNG KELAPA DENGAN KOMBINASI AKTIVASI KIMIA DAN FISIKA Djefry Tani; Sonny Lumingkewas
Jurnal Kimia Fullerene Vol 7 No 2 (2022): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v7i2.515

Kajian pembuatan karbon aktif dari tempurung kelapa telah dilakukan dengan perlakuan kimia dan fisika menggunakan aktivator HNO3 dan zat pengaktif gas CO2. Pembuatan karbon aktif dilakukan dengan pirolisis tempurung kelapa, kemudian diaktivasi secara kimia melalui proses perendaman dalam larutan HNO3 pada variasi konsentrasi 0,5; 1,0; 1,5; dan 2,0 M selama 12 jam. Karbon aktif dengan kualitas terbaik dihasilkan dari karbon aktif dengan konsentrasi HNO3 1,5 M pada temperatur 8000C . Hasil karakterisasi pada konsentrasi ini menghasilkan rendemen karbon aktif sebesar 73,41%%, kadar air 3,25%, kadar zat mudah menguap 19,20%, kadar abu 1,18%, karbon terikat 78,29% dan daya serap terhadap iodium sebesar 294,60 mg.g. Angka daya serap iodium ini memenuhi Standar Industri Indonesia no.0258-79

Pengaruh Pembentukan Peta Konsep Pada Materi Ikatan Kimia Bagi Siswa Kelas X Di SMA Negeri 1 Tondano Ketty Preity Amelia Br Situngkir; freetje Waworuntu; Sonny Lumingkewas
Oxygenius: Journal Of Chemistry Education Vol 5 No 2 (2023): Oxygenius : Journal Of Chemistry Education
Publisher : Chemistry Department, Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/ojce.v5i2.447

The purpose of this study was to determine student learning outcomes using the concept map formation strategy on chemical bonding material by comparing the average student learning outcomes of the experimental group using concept map formation and the control group using conventional methods. This research is an experimental study of two classes with a true experimental research design in the form of a posttest only control design. Samples were taken non-randomly, namely class X IPA 3 as the experimental class and X IPA 5 as the control class, with 30 students each. The average learning outcome of the experimental class is 87.12 and the average learning outcome of the control class is 81.84. Data for hypothesis testing is data obtained from posttest. Based on the one tailed hypothesis test at the significant level = 0.05, the value of tcount = 5.9967 and ttable of 2.001. The value of tcount> ttable, then H1 is accepted and H0 is rejected, this result shows that there is a difference in the average student learning outcomes from the experimental class and the control class, so it can be concluded that there is an effect of concept map formation on the average student learning outcomes in the chemical bonding material in class X. at SMA Negeri 1 Tondano.

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