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All Journal Jurnal Natur Indonesia Teknosains: Media Informasi Sains dan Teknologi SINEKTIKA: Jurnal Arsitektur Jurnal Kimia Mulawarman ARTEKS : Jurnal Teknik Arsitektur Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia EPI International Journal of Engineering Abdi Dosen : Jurnal Pengabdian Pada Masyarakat JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Jurnal Pengabdian kepada Masyarakat Nusantara Jurnal Riset Pendidikan MIPA Mattawang: Jurnal Pengabdian Masyarakat Panrannuangku Jurnal Pengabdian Masyarakat Media Eksakta Jurnal Akademika Kimia Jurnal Akademika Kimia
Baharuddin Hamzah
Pendidikan Kimia University Of Tadulako
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Health Professions Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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PENGALIRAN UDARA UNTUK KENYAMANAN TERMAL RUANG KELAS DENGAN METODE SIMULASI COMPUTATIONAL FLUID DYNAMICS Latif, Sahabuddin; Hamzah, Baharuddin; Ihsan, Ihsan
Sinektika: Jurnal Arsitektur Vol 14, No 2: Juli 2014
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Sirkulasi udara yang baik sangat dibutuhkan pada ruang berventilasi alami untuk mencapai kenyamanan termal, karena dapat  mempercepat proses evaporative cooling,pengeluaran panas dan ketersediaan udara segar dalam ruang. Penelitian ini bertujuanmengkaji aliran udara pada Ruang Kelas Gedung Kuliah Bersama Fakultas TeknikUniversitas Hasanuddin di Kabupaten Gowa, agar ditemukan rekayasa pengaliran udarayang dapat mempercepat terjadinya proses pengeluaran panas. Penelitian eksperimentalini menggunakan metode simulasi CFD (Computational Fluid Dynamics). Parameter input dalam simulasi diperoleh melalui  pengukuran di lapangan berupa dimensi ruang kelas, luas bukaan ventilasi, dan parameter iklim mikro. Rekayasa aliran udara dilakukanterhadap tiga perlakuan yaitu kecepatan udara, luas bukaan, serta modifikasi darikecepatan udara dan luas bukaan. Analisis dilakukan untuk mengetahui bagian ruangyang mengalami aliran udara tinggi dan rendah serta mengetahui faktor pendukung dan kendala dengan menggunakan perangkat lunak SolidWorks Simulation 2013. Hasilpenelitian memperlihatkan bahwa sistem ventilasi eksisting ruang-ruang kelas dapatmendistribusikan pergerakan udara yang nyaman di dalam ruang antara 0.25 m/s hingga 1.5 m/s, pada parameter inlet 1 m/s hingga 3 m/s dengan kenyamanan ruangan (51.85%) hingga (85.19%). Setelah dilakukan perbaikan sistem ventilasi pada ruang kelas,kenyamanan ruang dapat ditingkatkan menjadi (96.30%) hingga (100%), dengan rasioluasan bukaan ventilasi (21.60%) dari luas lantai ruangan, dengan rincian luas bukaaninlet (14.50%) dan luas bukaan outlet (7.10%). Disimpulkan bahwa penambahan luas inlet dan outlet dengan rasio yang tepat pada ruang kelas, dapat mengoptimalkansirkulasi udara. Diharapkan agar jendela kaca mati pada ruang-ruang kelas di buka untukmenambah luas inlet dan penambahan luas bukaan dinding outlet bagian bawah, pintusebaiknya di tutup pada saat ruang digunakan.
Pengaruh Konsentrasi Surfaktan Campuran (Span 80 dan Span 20) dan Rasio Volume Emulsi/Fasa Eksternal terhadap Ekstraksi Ion Kadmium (Cd) Menggunakan Teknik Emulsi Membran Cair Amin, Alif Hidayatullah; Hamzah, Baharuddin; Ningsih, Purnama
Jurnal Akademika Kimia Vol 7, No 4 (2018)
Publisher : Universitas Tadulako

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Abstract

Research on the extraction of cadmium(II) ion has been performed using the emulsion liquid membrane technique. This research used laboratory experimental method using benzoyl acetone as a carrier, kerosene as a membrane, nitric acid solution as an internal phase, span 80 and span 20 as a surfactant, and cadmium(II) solution as a sample. The present study was conducted to determine the optimum conditions of cadmium(II) ion extraction in solutions comprising variations in surfactant concentration of spans 80 and span 20 mixtures (1.5–3.5%) and variations in the ratio of emulsion/external phase (1:5–1:7). Determination of remaining of cadmium(II) ion concentration in the sample was analyzed using UV-Vis spectrophotometer at 519 nm wavelength. The results showed that the concentration of mixed surfactants (span 80 and span 20) which resulted in a maximum percent of extraction was 2.5% with 60.11% extraction percentage. In addition, the volume ratio of the emulsion/external phase gave a maximum extraction percentage at a ratio of 1:5.5 with an extraction percent of 78.03%.
Fabrication of Charcoal from Jackfruit’s Peel (Artocarpus heterophyllus) as Adsorbent on Dissolved Cadmium and Nickel Baloga, Hendra; Walanda, Daud K; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 8, No 1 (2019)
Publisher : Universitas Tadulako

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Abstract

Jackfruit’s peel contains lignocellulosic compounds that potential for fabrication of charcoal and useful for adsorbing heavy metals. Based on this, then it was conducted a study on the utilization of charcoal from jackfruit’s peel to be used as adsorbent on cadmium and nickel. The analysis process of this research was conducted by using atomic absorption spectrophotometry (SSA). The results showed that charcoal’s characteristics from jackfruit’s peel contained of 4.4% water, 9.3% ash, and biomass content that can be used as an absorbent was 86.3%. The optimum adsorption of charcoal from jackfruit’s peel for cadmium ion was contact time of 120 minutes, pH 7 and concentration of 40 mg/L with the percentages of penetration respectively were 84.65%, 99.10%, and 99.43%. On the other hand, for nickel was 150 minutes of contact time, pH 5, and concentration of 20 mg/L with percentage of penetration were 87.95%, 91.75%, and 75.15% respectively.
Analisis Kadar Kafein dalam Kopi Bubuk Lokal yang Beredar di Kota Palu Suwiyarsa, I Nyoman; Nuryanti, Siti; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 7, No 4 (2018)
Publisher : Universitas Tadulako

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Abstract

Analysis of caffeine level in local coffee powder that circulates in Palu city have been done. The purpose of this study was to determine the level of caffeine in local coffee powder, which is engaged in several markets in the city of Palu. Levels of caffeine in the study will be compared with the standard caffeine content according to the SNI 01-3542-2004, i.e. 0.45-2% w/w. The method used for qualitative analysis was the thin layer chromatography and for quantitative analysis was using UV-Vis spectrophotometry. The results of qualitative analysis of six local coffee powders A, B, C, D, E, and F showed each a Rf value between 0.32 to 0.40. Levels of caffeine (per 1 g of coffee powder) quantitatively ranging from brand samples A to F were 0.83, 2.06, 1.60, 2.63, 1.29, and 1.72%, respectively, percent level of caffeine of six samples of local powdered coffee, samples A, C, E and F in terms of SNI 01-3542-2004 were between 0.45-2.00% (w/w), while sample B and sample D exceeds 2% were 2.06% and 2.63%.
Analysis of Iron (Fe) and Zinc (Zn) in Red Fruit (Pandanus conoideus De Vriese) Alizah, Nur; Walanda, Daud K; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 8, No 2 (2019)
Publisher : Universitas Tadulako

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Abstract

Red fruit plant (Pandanus conoideus De Vriese) is very potential for health. This is because the plant contains many nutrients, especially minerals that are needed for the human body. Iron and zinc are two micro-minerals that contained in red fruit, but the content data about those are not widely known. The aim  of this research was to determine iron and zinc content by atomic absorption spectrophotometric of red fruit from  Mattirowaslle Village, South Pamona Sub-district, Poso Regency, Central Sulawesi. The water content of the sample obtained was 52%, and the ash content was 13.8%. While the analysis of iron and zinc content at wavelength 248.30 nm (iron) and 213.90 nm (zinc) obtained were 1,339 mg/100g for iron and 0,397 mg/100g for zinc.
PKM Pelatihan Dan Workshop Pembuatan Briket Arang Dan Asap Cair Pada Perkebunan Kakao Di Desa Budi Mukti Kecamatan Damsol Hamzah, Baharuddin; Rahmawati, Sitti
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol 2 No 2 (2018): JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : Dewan Pimpinan Daerah (DPD) Forum Dosen Indonesia JATIM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (595.68 KB) | DOI: 10.36339/je.v2i2.150

Abstract

This Community Partnership Program involved partners of farmer group in Budimukti Village, Damsol District,Donggala Regency, namely Panca Jaya and Subur Jaya farmer groups. Problems faced by both partners were: a) Cocoa shellsaround the cocoa plantations were increasingly piling up and left without handling because there was no technology toprocess the waste to have economic value to improve community?s standard of living. b) The surrounding community did notknow that cocoa shells can be processed to be charcoal briquettes as an alternative fuel to replace kerosene and to be liquidsmoke as a natural insecticide and preservative. c) They did not have skills in making charcoal briquettes and liquid smokefrom cocoa waste as raw material. The program aimed at improving farmers' knowledge and skills in designing technology tomake charcoal briquettes from cocoa shell waste and techniques in making liquid smoke from cocoa shell waste and theirrespective uses. The methods used were counseling and training as well as the practice of designing technology to makecharcoal briquettes and assembling technology for making liquid smoke from cocoa shell waste. Assistance to members ofpartnership groups was carried out with Participatory Methods. Extension activities were carried out in an effort to improvetheir knowledge, while training and demonstration plots were carried out in an effort to accelerate the process of technologytransfer to the community. The end results of this program were the increase in farmers? knowledge and the availability oftechnology packages for making charcoal briquettes and making liquid smoke from cocoa shell waste, so that the targetgroups can be independent in carrying out business activities using cocoa shell waste using the technology that had beenpracticed, on an ongoing basis
Pengaruh Ion Kadmium(II) dan Nikel(II) pada Ekstraksi Ion Tembaga(II) dengan Ekstraktan 4-Benzoil -1-Fenil-3-Metil- 2- Pirazolin-5-On Menggunakan Emulsi Membran Cair Hamzah, Baharuddin; Jalaluddin, Noor; Wahab, Abdul Wahid; Upe, Ambo
Jurnal Natur Indonesia Vol 13, No 3 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (123.52 KB) | DOI: 10.31258/jnat.13.3.269-275

Abstract

The effects of cadmium(II) and nickel(II) ions to copper(II) extraction using liquid membrane emulsion with 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-on (HPMBP) as an extractant was studied. The optimum condition forcopper(II) extraction were as follows: emulsification rate=2000 rpm, emulsification time=10 minutes, extractionrate=300 rpm, extraction time=15 minutes, concentration of mixed surfactant (span 80+span 20)=3%, volumeratio of membrane phase and internal phase=1:1, concentration of HPMBP=0.020 M, concentration of HCl=1M,volume ratio of emulsion and external phase=1:7. The result showed that the extraction of copper(II) by liquidmembrane emulsion with HPMBP as an extractant was selective to cadmium(II) and nickel(II) ions, relatively. Theresult also showed that in the extraction of 500 mg/l copper(II), the presence of 500 mg/l of nickel(II) was decreasingthe percentage of copper(II) extraction to be 83.73. While, the presence of 500 mg/l of cadmium(II) does notinfluence the percentage extraction of copper(II), relatively.
The analysis of Calsium (Ca), Magnesium (Mg), Sodium (Na) and Posphorus (P) ijn Beluntas (Pluchea indica L.) Leaves Fitriani, Eva; Walanda, Daud K.; Hamzah, Baharuddin
Jurnal Akademika Kimia Vol 8, No 1 (2019)
Publisher : Universitas Tadulako

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Abstract

Beluntas are bushes that may consumed as vegetable which mostly founded in Central of Sulawesi. The research purposes to determine the concentration of calcium (Ca), magnesium (Mg), sodium (Na), and posphorus (P) in beluntas leaves (pluchea indica L.). The concentration of Ca, Mg, and Na were obtained using atomic absorption spectrophotometer and the concentration of P was obtained using spectrodirect spectrophotometer. The average concentration of mineral in beluntas leaves are Ca 678.71 mg/100g, Mg 93.38 mg/100g, Na 198.11 mg/100g, and P 29.84 mg/100g.
Effect of Basil (Ocimum sanctum Linn) Leaf Extract As Repellent Against Mosquito Aedes aegypti Aulia, Nur; Hamzah, Baharuddin; Ningsih, Purnama
Jurnal Akademika Kimia Vol 8, No 2 (2019)
Publisher : Universitas Tadulako

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Abstract

Study on the effect of basil (Ocimum sanctum Linn) leaf extract has been done as a repellent against mosquito (Aedes aegypti). This study aimed to examine the effect of basil leaf extract on Aedes aegypti using an electrical device. This study usedan extraction method with ethanol 96%solvent followed by evaporation to obtain concentrated basil leaf extract. The concentrated extract was diluted to concentrations of 20, 30, 40 and 50% w/v. The results showed that the concentration of basil leaf extract 50% eliminatedmost mosquitoes (Aedes aegypti).
Application of Guided Discovery Learning Model to Enhance Student Learning Interest and Results in Science Subjects Fifth Class SD Inpres Tompi Bugis District of South Kulawi Asisa, Nur; Hamzah, Baharuddin; Mustapa, Kasmuddin
Jurnal Riset Pendidikan MIPA Vol. 1 No. 1 (2017)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j25490192.2017.v1.i1.pp48-52

Abstract

The purpose of this study was to increase interest and science learning outcomes in fifth-grade students of SD Inpres Tompi Bugis, Kulawi Selatan District through the application of guided discovery learning models. The method used is a classroom action research method with two cycles. Each cycle consists of two meetings. The results showed that in the first cycle of the first meeting, the observation of student activity obtained a value of 68%, was in the sufficient category, the value of students 'classical absorption was 74%, the students' classical learning completeness was 50% and the student's interest in learning 60% was in the sufficient category. In the first cycle of the second meeting, the observation of student activity obtained a value of 79%, in the good category, the value of students' classical absorption of 80%, 75% of students' classical learning completeness, and 74% of students' interest in learning were in a good category. The research was continued in cycle II with the results showing that the second cycle of the first meeting, the observation of student activity obtained a value of 80%, was in a good category, the value of students 'classical absorption was 84%, the students' classical learning completeness was 90% and the student's learning interest 80% were in the well. In the second cycle of the second meeting, the observation of student activity obtained a value of 90%, was in the very good category, the value of students 'classical absorption was 89%, the students' classical learning completeness was 100% and the student's interest in learning 90% was in the very good category. Thus, it can be concluded that the application of the guided discovery learning model can increase the interest and learning outcomes of fifth-grade students of SD Inpres Tompi Bugis, Kulawi Selatan District.
Co-Authors Abdul Wahid Wahab Afadil Agustin Tiwow Alep, Boni Alizah, Nur Amin, Alif Hidayatullah Anak Agung Istri Sri Wiadnyani Asisa, Nur Azzajjad, Muhammad Fath Baloga, Hendra Bayu Riyadi, Bayu Cica Anisa Daud Karel Walanda Delviana, Delviana Dia Afrianti Sangkota, Vivi Diharnaini Diharnaini Djahir, Ahmad Rifaldi Djasman, Syamsiar Masgul Fadlian, Fadlian Fiskanita, Fiskanita Fitriani, Eva Frantauansyah, Frantauansyah Genefefa T., Fulgensia Hardani, Muhammad F. Hardani, Muhammad Fakhrul HUsnia Mucthar Husnia, Husnia I Gusti Ngurah Antaryama Iffatunniswah Suhud Ihsan Ihsan Irawati, Dwi Ardi Irwan Irwan Irwan Said Jamaludin M Sakung Kadek N. Anjani Laksono Trisnantoro Linawati Linawati Luh Putu Ratna Sundari Magfirah Mangela, Yessika D. Minarni Rama Jura Moh. Yusuf, Moh. Muhammad Awaluddin Hamdy Mustapa, Kasmuddin Nasution, Annio Indah Lestari Ni Luh A. Murtini Noor Jalaluddin Nurdin Rahman Nurhayati Kamaruddin Nurul Jamala Pathuddin Paulus H. Abram Paulus Hengky Abram Poppy Fitra Wahyuni Pulukadang, Sri H. V. Purnama Ningsih Putri, Eska Perdanawati Kahar Rahmawati, Rahmawati Rawal, Andi Resky Reny, Reny Reny, Reny Rezki Rezki Ria Wikantari Ririen Hardani Rosady Mulyadi S, Afadil Sahabuddin Latif, Sahabuddin Sahida Sahida Salsabila, Unik Hanifah Sangkota, Vivi Diah Siti Nurbaya Siti Nuryanti Siti Rabiah Laonu Sitti Aminah Sitti Rahmawati Solfarina, Solfarina Sri Hastuti Virgianti Pulukadang Suhartini Musa Suherman Suherman Sulniawati, Sulniawati Supriyatno, Tri Octivan Suwiyarsa, I Nyoman Tamala, Sindy T. Taupik Hidayat Tiwow, Vanny Maria Agustina Tri Suci Lestari Tudjuka, Mora Delfita Tuljannah, Naima Widya Astuti