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All Journal JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Pendidikan Kimia (JPKim) Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Indonesian Journal of Chemical Science and Technology Jurnal Pendidikan dan Ilmu Sosial Konstanta: Jurnal Matematika dan Ilmu Pengetahuan Alam
Simatupang, Lisnawaty
Universitas Negeri Medan
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences

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ANALISIS KUALITAS PERAIRAN LAUT TERHADAP AKTIVITAS DI LINGKUNGAN PELABUHAN WAINGAPU-ALOR SUMBA TIMUR Rikson Siburian; Lisnawaty Simatupang; Minsyahril Bukit
JURNAL PENGABDIAN KEPADA MASYARAKAT Vol 23, No 1 (2017): JANUARI - MARET
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkm.v23i1.6639

Abstract

AbstrakPelabuhan Kalabahi-Alor di lahan milik PT (persero) pelabuhan Indonesia III Cabang Kupang, dengan luas daerah daratan pelabuhan 71.131 m2 dan lingkungan kerja perairan 1.880 Ha. Sedangkan luas lingkungan kepentingan adalah 1.813 Ha. Dengan ukuran 4 x 5 meter untuk dermaga I dan 115 x 10 meter untuk dermaga II. Wilayah monitoring termasuk dalam wilayah Kelurahan Teluk Mutiara, Kecamatan Teluk Mutiara,   Kabupaten Alor Provinsi NTT. Kegiatan ini dilakukan untuk analisis monitoring kualitas perairan laut di lingkunganpelabuhan umum Kalabahi-Alor.Kualitas air meliputi kualitas kimia-fisika perairan laut disekitar pelabuhan. Sampel air laut diambil dari 3 (tiga lokasi) yang berbeda. Hasil analisis dan pemantauan menunjukan bahwa kualitas air laut di kawasan pelabuhan merupakan dampak dari:kegiatan perkapalan (pengoperasian kapal dan kecelakaan kapal), limbah  yang berasal dari limbah kapal (bongkar-muat barang), aktivitas pelabuhan lainnya (seperti kegiatan kuliner),saluran drainase yang bermuara kelaut, bocoran dan tumpahan pembongkaran muatan yang bercampur minyak dan oli dari sisa ballast dan air sisa pencucian, serta limbah pemukiman yang masuk secara langsung di pinggiran pelabuhan.Data kualitas (sifat kimia-fisika) air laut wilayah perairan  pelabuhan Umum Kalabahi  yang dilaksanakan secara analisis insitu maupun laboratorium menunjukkan bahwa seluruh parameter yang diukur masih memenuhi baku mutu yang diizinkan oleh peraturan pemerintah.Kata Kunci: analisis, kualitas air laut, pelabuhan Waingapu AbstractKalabahi-Alor port on land owned by PT (Persero), the Indonesian port of Kupang Branch III, with an area of 71 131 m2 area of port land and waters 1,880 Ha working environment. While the broad sphere of interest is 1,813 Ha. With a size of 4 x 5 meters to the pier I and 115 x 10 meters to dock II. Monitoring region including the Gulf Pearl Village area, Teluk Mutiara, Alor Regency NTT Province. This activity is carried out for the analysis of sea water quality monitoring in the public ports Kalabahi-Alor. The quality of water include chemical-physical quality of the marine waters around the port. Sea water samples taken from 3 (three locations) are different. The results of analysis and monitoring showed that the seawater quality in the port area is the impact of: the activities of shipping (operation of ships and shipwrecks), waste from waste ship (loading and unloading), the activity of other ports (such as culinary activities), drainage channels which empties into the sea, leaks and spills that mixes the unloading of oil and oil from the remaining residual ballast water and washing, as well as residential waste that goes directly on the outskirts of the port. Data quality (chemical-physical) sea water port water area Kalabahi General conducted an in situ and laboratory analysis showed that all the measured parameters still meet quality standards permitted by government regulations.Keyword : analysiss, sea water quality, Waingapu port
Combination of Sinabung Volcanic Ash and Humic Acid Against Characteristics of Humid Silica Fertilizers Veny Apriyani; Thomson A.S Girsang; Ribka Sirait; Lisnawaty Simatupang
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 2 (2019): July 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i2.13998

Abstract

Volcanic ash from Mount Sinabung has a large silica (SiO2) content of 69,93% and contains minerals needed by soil and plants. This potential cannot be directly utilized due to the acidic nature of volcanic ash which can damage plants. To be used as fertilizer, the process can be accelerated by adding humic acid from chicken manure. So the purpose of this study is to manufacture humic silica fertilizer by combining volcanic ash with humic acid from chicken manure and and  the characteristics of humic silica fertilizer. In this study a method of extracting humic acid from chicken manure was used using sodium hydroxide (NaOH) 0,25 M solution and mixing volcanic ash with humic acid. The results of humic acid extract from chicken manure were then combined with volcanic ash from sinabung. Nutrients from the combination obtained at variation 60:40 with the highest organic C were 1.37%, N total 0.24%, Phosphate 20.64 ppm and Potassium 0.664 me / 100g with pH fertilizer 6 and crumb texture and free neutral which indicates the fertilizer is ready to use.
Analysis of Corrosion Rate With Addition of Pumps in Commercial Steel in Sea Water Media Rini Selly; Ricky Andi Syahputra; Moondra Zubir; Lisnawaty Simatupang; Erpida Ompusunggu; Jesicca Aprilyani; Nopita Sitompul
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 3, No 1 (2020): January 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v3i1.18339

Abstract

Corrosion or rusting is very common in metals is a decrease in the ability of a metal due to the environment or chemicals. Sea water is a corrosive environment for metals because it contains sodium chloride (NaCl), calcium sulfate (CaSO4), calcium carbonate (CaCO3), and dissolved oxygen (O2) which affect the corrosion process of the material. The presence of dissolved oxygen will cause the rate of corrosion in metals to increase with increasing oxygen content (O2), the solubility of oxygen in water is a function of pressure, temperature and chloride content. The process of corrosion is almost the same for all materials, especially in metals occurs slowly but surely, corrosion can cause a material to have a limited service life, where the material expected to be used for a long time turns out to have a shorter life span than the average usage life.
ACTIVATION OF SINABUNG MOUNT VOLCANIC ASH USING VARIOUS MINERAL ACIDS Shohihatun Bariyah; Lisnawaty Simatupang
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23087

Abstract

The effect of various types of mineral acids in activating the silica of volcanic ash of Mount Sinabung has been carried out. The use of various types of mineral acids is aimed at reducing impurities in the form of metals contained in the ash so that it can increase the SiO2 content in the ash. In the treatment, volcanic ash is prepared beforehand by grinding and sieving with a 200 mesh sieve. The sieved ash was then added with mineral acids, namely HCl, HNO3 and concentrated H2SO4 and heated at 100oC for 2 hours. After that, it was neutralized with distilled water and in an oven at 120oC for 6 hours and characterized using XRF to determine the impurities that had been lost. Based on the results obtained using XRF characteristics, the SiO2 content of volcanic ash activated with HCl was 80,23%, HNO3 was 77,23% and H2SO4 was 76,89%. This shows that activation using HCl is more optimal than using HNO3 and H2SO4.
Application of Humid Silica Plus Fertilizer with Various Combinations of Planting Media Thomson A.S. Girsang; Veny Apriyani; Desti S.N Pasaribu; Lisnawaty Simatupang
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 2 (2019): July 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i2.14000

Abstract

Volcanic ash contains minerals needed by soil and plants with the highest composition of total elements, namely Ca, Na, K and Mg, other macro elements in the form of P and S, while micro elements consist of Fe, Mn, Zn, Cu. The layer of volcanic dust that has the potential to contain nutrients for soil fertilization for agriculture can actually only be used about 10 years after the spread of volcanic ash. Soil fertilization can be accelerated if mixed with organic materials such as by using chicken manure fertilizer which has nutrients from chicken manure: N = 1.7%, P2O5 = 1.9%, K2O = 1.5%. Humic acid helps regulate clay and soil improvement, binds and transfers micro elements from the soil to plants, increases water absorption, and stimulates the development of microorganisms in the soil. Therefore, this study was conducted to make humic silica fertilizer in the planting medium by utilizing volcanic ash in combination with chicken manure mixed with soil. In this study apart from being a source of humic acid, chicken manure is also beneficial because it contains microorganisms which will be useful in accelerating the fertilizer incubation process. The composition of the fertilizer mixture used in this study is: volcanic ash sinabung: chicken manure: soil = 20: 50: 30; 30: 50:20; 40: 50: 10. The mixture is stirred evenly and then incubated for 30 days. After 30 days, the nutrient content of these fertilizers was tested and the highest content of the nutrients obtained in the combination was 20:50:30 namely: Organic C-1.35%, N-total 0.2%, P-available 20.16 ppm , K-available 0.527 me / 100g, C / N 6.75%, and humic acid contained in 3.925%
Perbedaan Hasil Belajar Siswa Menggunakan Model Kooperatif Tipe MM dan TGT dengan bantuan Powerpoint Ayu Puspita Sari; Lisnawaty Simatupang
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 1, No 1 (2019): APRIL 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.968 KB) | DOI: 10.24114/jipk.v1i1.12505

Abstract

Penelitian ini bertujuan untuk mengetahui apakah ada perbedaan hasil belajar siswa menggunakan model kooperatif tipe Make a Match (MM) dan Teams Games Tournament(TGT) dengan bantuan PowerPoint pada pokok bahasan koloid. Sampel yang digunakan sebanyak 2 kelas reguler dengan teknik random sampling (acak) dan masing–masing kelas terdiri atas 40 siswa. Pada kelas eksperimen I diberi pengajaran dengan model kooperatif tipe MM dengan bantuan powerpoint dan pada kelas eksperimen II diberikan pengajaran dengan model TGT dengan bantuan powerpoint. Hasil pengolahan data menunjukkan siswa pada kelas MM memiliki rata – rata nilai pre-tes 51,44 + 17,85 dan post-tes87,62+6,25 dengan rata – rata gain sebesar 73,53%. Sedangkan siswa pada kelas TGT memiliki rata – rata nilai pre-tes 45,25+14,24 dan post-tes83,94+5,58 dengan rata – rata gain sebesar 69,46%. Uji hipotesis dilakukan dengan menggunakan uji t dua pihak dari data hasil belajar dan diperoleh thitung = 2,80  sedangkan ttabel = 1,994 untuk α = 0,05 dan db = 78, sehingga thitung>ttabel. Maka Ha diterima yakni ada perbedaan hasil belajar siswa menggunakan model kooperatif tipe MM dengan bantuan powerpoint dengan model TGTdengan bantuan powerpoint yaitu sebesar 4,07%. Berdasarkan perbandingan peningkatan hasil belajar siswa diperoleh bahwa hasil belajar yang tertinggi yaitu dengan pembelajaran menggunakan model MM.
Pengembangan Lembar Kerja Siswa (LKS) Berbasis Inkuiri Terbimbing Pada Pokok Bahasan Kesetimbangan Kimia Lisnawaty Simatupang; Indah Santika
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 3, No 1 (2021): APRIL 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (562.431 KB) | DOI: 10.24114/jipk.v3i1.24098

Abstract

Student worksheets are sheets that are used as guidelines in learning and contain tasks that must be done by students in certain studies. This study aims to see: (1) The design of student worksheets based on guided inquiry on the subject of chemical equilibrium; (2) analyzing the feasibility of student worksheets (LKS) based on guided inquiry learning models on chemical equilibrium material; (3) analyzing the response of student and teacher attractiveness to student-based student worksheets based on guided inquiry on the subject of chemical equilibrium. The research subjects were student worksheets based on guided inquiry. The object of research is the material of chemical equilibrium. The development of student worksheets refers to the research and development model of the Borg and Gall. This worksheet has been validated by validators / experts and has been through small group trials to obtain valid and interesting results. The results of this study indicate that: the results of validation by material experts get a percentage of 85% and the results of validation by media experts get a percentage of 88,57% with a very feasible category. Meanwhile, the results of the attractiveness based on the responses of the teacher and students got a percentage of 90% and 88.85% respectively, with the very interesting category.
Pengembangan Lembar Kerja Siswa (LKS) Berbasis Pendekatan Saintifik Pada Pokok Bahasan Laju Reaksi Widya Syahdi; Lisnawaty Simatupang; Nora Susanti
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 3, No 2 (2021): OKTOBER 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (554.661 KB) | DOI: 10.24114/jipk.v3i2.28179

Abstract

Penelitian ini bertujuan untuk mendapatkan LKS pendekatan saintifik yang utamanya membahas tentang reaksi yang memenuhi kriteria, ketepatan bahasa, penempatan, dan sesuai menurut BSNP, menentukan respons LKS berbasis pendekatan saintifik terhadap laju reaksi dan untuk mengetahui hasil. siswa yang menggunakan LKS di SMA lebih tinggi dari KKM. Jenis penelitian yang digunakan adalah Research and Development (R&D). Populasi dalam penelitian ini adalah seluruh siswa kelas XI SMA Swata Prayatna Medan tahun ajaran 2020/2021. Sampel ditentukan secara purposive sampling dengan mengambil 1 kelas sebagai kelas eksperimen.Hasil penelitian menunjukkan: 1) LKS berbasis pendekatan saintifik pada pokok bahasan reaksi yang dikembangkan memenuhi kriteria BSNP, dengan pengolahan data yang diperoleh: sesuai = 3,70, menurut bahasa = 3,56, sesuai = 3,67, dan sesuai grafik = 3 ,75 dengan Kriteria valid dan tidak perlu direvisi; 2) Hasil angket respon siswa terhadap LKS berdasarkan pendekatan saintifik pada materi laju reaksi diperoleh rata-rata 90,41%. 3) Hasil belajar siswa yang menggunakan LKS berbasis pendekatan saintifik pada pokok bahasan Laju reaksi lebih tinggi daripada KKM.
Pengaruh Model Pembelajaran PBL Terhadap Aktivitas Belajar Dan Hasil Belajar Siswa Pada Materi Asam Basa Wanti Dahlia Siregar; Lisnawaty Simatupang
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 2, No 2 (2020): OKTOBER 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (539.405 KB) | DOI: 10.24114/jipk.v2i2.19571

Abstract

The objectives of this study is (1) to determine whether the learning activities of students who were taught with the Problem Based Learning model were higher than those of students who were taught using the Direct Instruction learning model (2) to determine whether the learning outcomes of students who were taught with the Problem Based Learning model is higher than the learning outcomes of students who are taught with the Direct Instruction learning model (3) to determine whether there is a correlation between student learning activities and student learning outcomes. The research instrument consisted of test instruments and non-test instruments. The analysis technique used is the right side  test and correlation test or test (product moment). From the results of data analysis of learning outcomes obtained (1) student learning activities that were taught with the Problem Based Learning learning model (86,20) were higher than the learning activities of students who were taught with the Direct Instruction learning model (79,86) (2) learning outcomes students who are taught with the Problem Based Learning model (83.75) are higher than the learning outcomes of students who are taught with the Direct Instruction learning model (71.94) (3) there is a positive and significant correlation between student learning activities and student learning outcomes. taught by the Problem Based Learning model, the contribution of student learning activities to learning outcomes was 21.92% while 78.08% was caused by other factors.
The difference of student’s activities and learning outcome with problem based learning using macromedia flash and handout Desi Natalia Purba; Marini Damanik; Saronom Silaban; Lisnawaty Simatupang
Jurnal Pendidikan Kimia (JPKim) Vol 10, No 3 (2018): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (407.678 KB) | DOI: 10.24114/jpkim.v10i3.12704

Abstract

This study aimed to determine the difference of student’s activities and learning outcome with PBL using macromedia flash and handout. The sample were selected using purposive sampling into experimental group I and experimental group II with 60 students. The experimental group I used the PBL using macromedia flash, while the experimental group II used the PBL using handout. The results indicated that the mean scores of student’s activities and learning outcome in the experimental group II were significantly higher than those in the experimental group I. Thus, there was a difference in student’s activities and learning outcome.  The correlation test between student’s activities and learning outcome presented that the experimental group I rcount>rtable (0.625>0.361) and the experimental group II rcount>rtable (0.683>0.361), it concluded that there was a positive correlation between student’s activities and learning outcome with PBL using macromedia flash and handout.Keywords:activities; difference; handout; macromedia flash; learning outcome; PBL
Co-Authors Agus Kembaren Ayu Puspita Sari Desi Natalia Purba Desti S.N Pasaribu Elfrida Ginting Erpida Ompusunggu Freddy Tua Musa Panggabean Herlinawati Herlinawati Indah Santika Ir. Luciyana Br Sirait Jesicca Aprilyani Junifa Layla Sihombing Marini Damanik Marudut Sinaga Maryati Evivani Doloksaribu Minsyahril Bukit Moondra Zubir Nopita Sitompul Nora Susanti Pasar Maulim Silitonga Ratu Evina Dibyantini Ribka Sirait Ricky Andi Syahputra Ricky Andi Syahputra Rika Adhani Rikson Siburian Rini Selly Saronom Silaban Shohihatun Bariyah Thomson A.S Girsang Thomson A.S. Girsang Veny Apriyani Wanti Dahlia Siregar Widya Syahdi Zeny Afriska Barutu