Garuda - Garba Rujukan Digital

THE EFFECT OF MAGNETITE (Fe3O4)CATALYST FROM IRON SANDS ON DESORPTION TEMPERATURE OF MgH2 HYDROGEN STORAGE MATERIAL Maulinda Maulinda; zulkarnain Jalil; Adi Rahwanto
Jurnal Natural Volume 16, Number 1, March 2016
Publisher : Universitas Syiah Kuala

One of the future technologies for a safe hydrogen storage media is metal hydrides. Currently, Mg-based metal hydride has a safety factor and efficient for vehicle applications. However, the thermodynamic properties of magnesium hydride (MgH2) found a relatively high temperature. High desorption temperatures caused MgH2 high thermodynamic stability resulting desorption enthalpy is also high. In this study, natural mineral (iron ore) has been extracted from iron sand into powder of magnetite (Fe3O4) and used as a catalyst in an effort to improve the desorption properties of MgH2. Magnetie has been successfully extracted from iron sand using precipitation method with a purity of 85 % , where the purity of the iron sand before extracted was 81%. Then, MgH2-Fe3O4 was milling using mechanical alloying method with a variety of catalysts and milling time. The observation by XRD showed the material was reduced to nanocrystalline scale. MgH2 phase appears as the main phase. DSC test results showed with the addition of Fe3O4, the desorption temperature can be reduced up to 366oC, compared to pure pure MgH2 reached by 409o C. Furthermore, based on gravimetric test, the hydrogen release occurs at a temperature of 388o C, weight loss of 0.66 mg during 16 minutes.

Analysis of Crystallinity and Physical Properties of the Bio-solar Gemstone Ismail Ismail; Akmal NIzar; Murzal .; Zulkarnain Jalil
Aceh International Journal of Science and Technology Vol 8, No 3 (2019): December 2019
Publisher : Graduate Program of Syiah Kuala University

Abstract – Bio-solar is one of the natural gemstones found in the province of Aceh in Indonesia. A recent study suggested that this gemstone could be considered as a vesuvianite type of gemstone. Nevertheless, detail information of this bio-solar gemstone is still unknown. We do not know whether the bio-solar gemstone is crystalline or amorphous. The specific gravity and the hardness of this gemstone are also still unknown. This information is essential to determine the quality of a gem. To answer those questions, we have used x-ray diffraction to study the bio-solar gemstone from the province of Aceh in Indonesia. The physical properties (specific gravity and hardness) of this gemstone have also been measured. We found that the bio-solar gemstone is composed by CaO, SiO2, MgO, Al2O3, Fe2O3, and TiO2 phases. Our results revealed that the bio-solar gem is a crystalline material, not amorphous. The average crystallite size of this gemstone is found to be 353 Å (35 nm). Moreover, the specific gravity of bio-solar gemstone is found to be 3.09 – 3.34. Its hardness is 3 to 4 mohs. Thus, the bio-solar is a good quality gemstone. Our finding confirmed that the bio-solar could be classified as a vesuvianite gemstone.

Heavy metal content in pumpkin pond of Kutaraja Fishing Port Banda Aceh Muhammad Muhammad; Shelly Anggi Pratiwi; Thaib Rizwan; Zulkarnain Jalil
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Fishing port scan support fishery resources management by incorporating social-economic activities to improve the local community's welfare; however, it can also negatively impact the environment by increasing waste pollution to the surrounding waters. Kutaraja Fishing Port, Banda Aceh, is one of the active fishing ports that conduct multiple activities, such as industrials, transportations, and domestic activities threatening the environment through the production of pollution such as heavy metals. The purpose of this study is to determine the concentration of heavy metals Zinc (Zn) and Chromium (Cr) and the sediment contamination level in the Kutaraja Fishing Port, Banda Aceh. This research was conducted in February 2021 at the water site of Samudra Kutaraja Fishing Port, Banda Aceh, and sampled sediments using the purposive sampling method. Samples were then analyzed for heavy metal concentration using the Atomic Absorption Spectrophotometer (AAS) instrument in the laboratory of the Aceh Industrial Research and Standardization Center (BARISTAND). The results showed that the concentration of heavy metal Zn ranged from 15.6507 - 27.2939 mg/kg. The majority of heavy metal Cr concentrations were below the test limit of 0.000, except at station 2, which was 9.1212. Both heavy metal concentrations are still categorized as low contamination criteria and still below the Australian and New Zealand Environment and Conservation Council (ANZECC, 2000) and the Canadian Council of Ministers for the Environment (CCME, 2002). This research proved that both heavy metals do not threaten the biota and have a low contamination level in the waters.Keywords:SedimentHeavy metal (Zn)Heavy metal (Cr)Atomic-absorptionSpectro-photometerAssessment

PENERAPAN PEMECAHAN MASALAH MODEL POLYA UNTUK MENINGKATKAN KEMAMPUAN ANALISIS DAN HASIL BELAJAR PADA MATERI VEKTOR DI SMAN 1 DARUL IMARAH Zahriah Zahriah; M. Hasan; Zulkarnain Jalil
Jurnal Pendidikan Sains Indonesia Vol 4, No 1 (2016): APRIL 2016
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (121.986 KB)

Materi vektor sangat penting untuk dipahami di awal proses pembelajaran fisika, tetapi pemahaman tentang vektor sering tidak mencapai skala ketuntasan minimal. Penelitian ini mencoba melihat potensi penggunaan pemecahan masalah model Polya dalam meningkatkan kemampuan analisis dan hasil belajar siswa pada materi vektor di SMA. Metode yang digunakan adalah kuasi eksperimen dengan desain “pretes-postest control group design” menggunakan kelompok kontrol. Penelitian dilakukan terhadap siswa kelas X pada SMAN 1 Darul Imarah di Kabupaten Aceh Besar tahun ajaran 2015/2016. Hasil penelitian menunjukkan persentase rata-rata N-gain kemampuan analisis pada kelas eksperimen 62,59% dengan kategori sedang dan pada kelas kontrol 27,53% dengan kategori rendah. Persentase N-gain hasil belajar pada kelas eksperimen 37,61% dengan kategori sedang dan kelas kontrol 26,39% dengan kategori rendah. Hal ini menunjukkan bahwa penggunaan pemecahan masalah model Polya dapat lebih meningkatkan kemampuan analisis dan hasil belajar dibandingkan model pembelajaran yang hanya berbasis pada ceramah. Siswa pada kelas eksperimen memberikan respon yang positif terhadap setiap aktivitas belajar yang menunjukkan adanya peningkatan motivasi belajar dan dorongan untuk berpikir secara lebih terstruktur dalam pemecahan masalah.

PENGEMBANGAN LEMBAR KERJA PESERTA DIDIK (LKPD) BERBASIS MASALAH PADA POKOK BAHASAN CERMIN UNTUKMENINGKATKAN MOTIVASI DAN HASIL BELAJARSISWA DI SMP NEGERI 2 BANDA ACEH Zaraturrahmi Zaraturrahmi; Adlim Adlim; Zulkarnain Jalil
Jurnal Pendidikan Sains Indonesia Vol 4, No 1 (2016): APRIL 2016
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (138.293 KB)

Telah dilakukan penelitian tentang pengembangan lembar kerja peserta didik berbasis masalah pada pokok bahasan cermin. Penelitian dilakukan di SMP Negeri 2 Banda Aceh dengan menggunakan penelitian kuantitatif dengan metode penelitian research and development (R D). Penelitian ini menggunakan metode quasi eksperimen dengan desain pretest dan posttest group.Teknik pengambilan sampel dengan pusposive sampling. Pengumpulan data dilakukan dengan dengan pretest dan posttest untuk hasil belajar dan motivasi. Angket untuk mengetahui respon peserta didik setelah menggunakan LKPD berbasis masalah. Hasil uji normalitas dan homogenitas menunjukkan bahwa data homogen dan berdistribusi normal. Oleh karena itu, uji beda rata-rata terhadap N-gain hasil belajar antara kedua kelas menggunakan uji t. Hasil uji t diperoleh t-hitung t-tabel (4,912,046) yang artinya terjadi perbedaan hasil belajar yang signifikan antara kedua kelas. Nilai rata-rata N-gain hasil belajar dan motivasi untuk kedua kelas eksperimen sebesar 50,92 termasuk kategori sedang, sedangkan untuk kelas kontrol diperoleh N-gain sebesar 32,5 termasuk kategori sedang. Peserta didik juga memberikan respon yang positif terhadap penggunaan LKPD, sehingga dapat disimpulkan bahwa pembelajaran dengan menggunakan LKPD berbasis masalah dapat meningkatkan hasil belajar dan motivasi peserta didik.

PENERAPAN MODEL PEMBELAJARAN INKUIRI TERBIMBING UNTUK MENINGKATKAN KETERAMPILAN PROSES SAINS DAN MOTIVASI BELAJAR SISWA SEKOLAH DASAR Rahmani Rahmani; Abdul Halim; Zulkarnain Jalil
Jurnal Pendidikan Sains Indonesia Vol 3, No 1 (2015): April 2015
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (135.603 KB)

Penelitian ini bertujuan untuk mengetahui peningkatan keterampilan proses sains dan motivasi belajar siswa pada materi sifat-sifat cahaya setelah menerapkan model pembelajaran inkuiri terbimbing. Hipotesis yang dirumuskan dalam penelitian ini adalah penerapan model pembelajaran inkuiri terbimbing dapat meningkatkan keterampilan proses sains dan motivasi belajar siswa pada materi sifat-sifat cahaya. Metode yang digunakan dalam penelitian ini adalah eksperimen semu (quasi-exsperimental research). Desain penelitian yang digunakan dalam penelitian ini adalah one group pretest posttest design. Populasi dari penelitian ini adalah seluruh siswa kelas V SD Negeri 37 Banda Aceh tahun ajaran 2014/2015 yang berjumlah 30 siswa. Sampel dalam penelitian ini adalah seluruh populasi dijadikan sampel. Kelas V dijadikan sebagai kelompok eksperimen yang dikenai model pembelajaran inkuiri terbimbing. Pada awal pembelajaran diberi pretest dan akhir pembelajaran diberi posttes dengan menggunakan instrumen yang sama. Teknik pengumpulan data dalam penelitian ini adalah dengan tes dan angket, teknik pengolahan data menggunakan statistik uji-t. Berdasarkan hasil uji normalitas dan homogenitas data diperoleh bahwa data keduanya normal dan homogen. Dari hasil perhitungan untuk keterampilan proses sains diperolehthitung = 29,1274 sedangkan nilai ttabel= 1,6827 dan hasil perhitungan untuk motivasi belajar siswa diperolehthitung = 7,427 sedangkan nilai ttabel= 1,6827. Oleh karena thitung ttabel maka Ho ditolak dan terima Ha. Jadi dapat disimpulkan bahwa penerapan model pembelajaran inkuiri terbimbing dapat meningkatkan keterampilan proses sains dan motivasi belajar siswa pada materi sifat-sifat cahaya.

PENERAPAN PEMBELAJARAN KONTEKSTUAL UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR LOGIS DAN PEMAHAMAN PESERTA DIDIK SMP PADA MATERI SIFAT-SIFAT CAHAYA Surya Hafnidar; Abdul Gani; Zulkarnain Jalil
Jurnal Pendidikan Sains Indonesia Vol 4, No 2 (2016): Oktober 2016
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.887 KB)

Penelitian penerapan pembelajaran kontekstual pada materi sifat-sifat cahaya telah dilakukan di SMP Negeri I Meulaboh, Aceh Barat menggunakan metode eksperimen semu dengan desain pretest dan posttest group. Teknik pengambilan sampel secara purposif dengan membandingkan nilai rata-rata tiap kelas pada mata pelajaran sains. Dua kelas yang memiliki nilai yang sama dipilih sebagai kelas eksperimen dan kontrol. Pengumpulan data kemampuan berpikir logis (KBL) dan pemahaman peserta didik dilakukan melalui pretest dan posttest. Data KBL juga diperoleh dari lembar observasi dalam PBM sains. Uji data pretest KBL dan pemahaman kedua kelas menunjukkan bahwa salah satu data tidak berdistribusi normal, sehingga dipergunakan uji Mann-Whitney untuk menguji hipotesis penelitian. N-gain rata-rata KBL untuk kedua kelas berkategori tinggi dan uji hipotesis diperoleh z-hitungz-tabel (2,87 2,58) yang artinya pembelajaran kontekstual dapat meningkatkan KBL secara lebih baik. Hasil observasi juga menunjukkan bahwa nilai rata-rata KBL pada kelas eksperimen lebih tinggi dari pada kelas kontrol. N-gain rata-rata pemahaman untuk kedua kelas berkategori sedang dan uji hipotesis menunjukkan z-hitungz-tabel (2,922,33) yang artinya pembelajaran konstekstual meningkatkan kemampuan pemahaman peserta didik secara lebih baik. Dari hasil penelitian dapat disimpulkan bahwa pembelajaran kontekstual secara signifikan dapat meningkatkan KBL dan pemahaman peserta didik secara lebih baik pada materi sifat-sifat cahaya

Heavy metal content in pumpkin pond of Kutaraja Fishing Port Banda Aceh Muhammad Muhammad; Shelly Anggi Pratiwi; Thaib Rizwan; Zulkarnain Jalil
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.2.20943

Fishing port scan support fishery resources management by incorporating social-economic activities to improve the local community's welfare; however, it can also negatively impact the environment by increasing waste pollution to the surrounding waters. Kutaraja Fishing Port, Banda Aceh, is one of the active fishing ports that conduct multiple activities, such as industrials, transportations, and domestic activities threatening the environment through the production of pollution such as heavy metals. The purpose of this study is to determine the concentration of heavy metals Zinc (Zn) and Chromium (Cr) and the sediment contamination level in the Kutaraja Fishing Port, Banda Aceh. This research was conducted in February 2021 at the water site of Samudra Kutaraja Fishing Port, Banda Aceh, and sampled sediments using the purposive sampling method. Samples were then analyzed for heavy metal concentration using the Atomic Absorption Spectrophotometer (AAS) instrument in the laboratory of the Aceh Industrial Research and Standardization Center (BARISTAND). The results showed that the concentration of heavy metal Zn ranged from 15.6507 - 27.2939 mg/kg. The majority of heavy metal Cr concentrations were below the test limit of 0.000, except at station 2, which was 9.1212. Both heavy metal concentrations are still categorized as low contamination criteria and still below the Australian and New Zealand Environment and Conservation Council (ANZECC, 2000) and the Canadian Council of Ministers for the Environment (CCME, 2002). This research proved that both heavy metals do not threaten the biota and have a low contamination level in the waters.Keywords:SedimentHeavy metal (Zn)Heavy metal (Cr)Atomic-absorptionSpectro-photometerAssessment

Transfer teknologi pakan organik 'maggot' sebagai upaya peningkatan produktivitas ikan air tawar masyarakat Gampong Dham Pulo, Aceh Besar (Transfer of organic feed technology ‘maggot’ as an effort to increase freshwater fish productivity, Dham Pulo Village, Ingin Jaya Sub-District, Aceh Besar) Dedi Fazriansyah Putra; Ivan Almerian; Izzuddin Al-Qossam; Aris Darmika Munthe; Gebrina Zikra Barizki; Nabila Isvalana; Windy Mirnawati; Jul Aidil; Annisa Zuhra; Silvana Rahayu; Putri Dyana Harahap; Wilma Farisi; Tjut Nyak Ghalda Gheitsa; Nur Aiza; Fatha Yufari Alfani; Riqqa Rahmania Sallim Harahap; Zulkarnain Jalil; Reki Feriyanto
Buletin Pengabdian Vol 2, No 1 (2022): Bull. Community. Serv.
Publisher : The Institute for Research and Community Services (LPPM) Universitas Syiah Kuala (USK)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/bulpengmas.v2i1.25051

The objectives of this community service implementation are; provide information to the public how to make fish feed that is cheap, easy, and environmentally friendly so that people do not have trouble getting fish feed raw materials. Community Service in the Holistic Village Development and Guidance Program (PHP2D) was carried out in Dham Pulo Village (Gampong), Want Jaya District, Aceh Besar District, from August to December 2021. The general stages of this activity consist of 4 (four) stages main activities, namely: socialization and training on maggot organic feed technology, independent bioconversion-based organic feed manufacturing practices, training on digitalization of marketing fishery products, websites and social media and evaluation in the form of workshops or FGDs involving all stakeholders such as the village government, fisheries service and private agencies. . The results obtained from this activity are the information obtained regarding the technology of maggot cultivation independently as a substitute for catfish feed. The conclusion of this PHP2D activity is that the community can increase their skills in maggot cultivation techniques (Hermetia Illucens) independently which can be used as an alternative to pellets as fish feed.

Heavy metal content in pumpkin pond of Kutaraja Fishing Port Banda Aceh Muhammad Muhammad; Shelly Anggi Pratiwi; Thaib Rizwan; Zulkarnain Jalil
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.2.20943

Fishing port scan support fishery resources management by incorporating social-economic activities to improve the local community's welfare; however, it can also negatively impact the environment by increasing waste pollution to the surrounding waters. Kutaraja Fishing Port, Banda Aceh, is one of the active fishing ports that conduct multiple activities, such as industrials, transportations, and domestic activities threatening the environment through the production of pollution such as heavy metals. The purpose of this study is to determine the concentration of heavy metals Zinc (Zn) and Chromium (Cr) and the sediment contamination level in the Kutaraja Fishing Port, Banda Aceh. This research was conducted in February 2021 at the water site of Samudra Kutaraja Fishing Port, Banda Aceh, and sampled sediments using the purposive sampling method. Samples were then analyzed for heavy metal concentration using the Atomic Absorption Spectrophotometer (AAS) instrument in the laboratory of the Aceh Industrial Research and Standardization Center (BARISTAND). The results showed that the concentration of heavy metal Zn ranged from 15.6507 - 27.2939 mg/kg. The majority of heavy metal Cr concentrations were below the test limit of 0.000, except at station 2, which was 9.1212. Both heavy metal concentrations are still categorized as low contamination criteria and still below the Australian and New Zealand Environment and Conservation Council (ANZECC, 2000) and the Canadian Council of Ministers for the Environment (CCME, 2002). This research proved that both heavy metals do not threaten the biota and have a low contamination level in the waters.Keywords:SedimentHeavy metal (Zn)Heavy metal (Cr)Atomic-absorptionSpectro-photometerAssessment

Title

Found 26 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 26 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 26 Documents
Search