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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 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 Lingkungan Binaan Indonesia 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 Environmental Science Health Professions Library & Information Science Mathematics Physics Public Health Social Sciences Other

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Analisis Kadar Senyawa Flavonoid Ekstrak Etanol Buah Pare (Momordica charantia L.) Tri Suci Lestari; Baharuddin Hamzah
Media Eksakta Vol 18 No 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/me.v18i2.1505

Abstract

Pare (Momordica charantia L.) is a plant that grows in the tropics, namely Asia, the Amazon (South America), East Africa and the Caribbean. The bitter taste of this fruit gives rise to several benefits including stimulating appetite, curing jaundice, improving digestion. Bitter taste in bitter melon is caused by the content of momordicosides of the triterpene glucoside group or kukurtibacin. This study aims to determine the levels of flavonoids in bitter melon (Momordica charantia L.). The method used in this research is the maceration extraction method using ethanol as a solvent. The extraction results were analyzed qualitatively by adding Mg and HCl powder to determine the presence of flavonoid compounds. While the quantitative test was carried out using the differential pH method in an acidic atmosphere, namely at pH 1 and pH 4.5. Determination of flavonoid content of bitter melon extract using UV-Vis spectrophotometry at 520 nm and 700 nm wavelengths. The results obtained in the qualitative test showed that the bitter melon extract contained positive flavonoids. The results of the quantitative test showed that the total flavonoid content in the bitter melon extract was 0.41 mg/100 g.
Analisis Kadar Protein pada Tulang Sapi dari Limbah Kaledo Asal Kota Palu Sulawesi Tengah Cica Anisa; Baharuddin Hamzah
Media Eksakta Vol 18 No 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/me.v18i2.2162

Abstract

Kaledo (donggala ox leg) is one of the famous culinary in Central Sulawesi. The number of restaurants that provide kaledo menus causes problems, due to the lack of utilization of the bone waste, causing problems in the environment. People still don't know that beef bones still contain protein. Protein serves as a form of new tissue during the growth and development of the body. This study aims to determine the protein content of beef bones from kaleo waste from the city of Palu, Central Sulawesi, which was taken randomly from a kaledo restaurant. Determination of protein content in beef bones from kale waste using the Kjeldhal method. In the results of calculations that have been carried out with three repetitions, it was found that the protein content in Repetition1 was 3.85%, Repetition2 was 3.59% and Repetition3 was 4.2%. The average protein content of beef bones from kale waste is 3.88%. The results of this study are expected to be a source of information about the protein content contained in beef bones from kaleo waste and can be used further as a substance in the utilization of bone waste.
Kandungan Magnesium, Kalium, Kalsium Dan Fosfor Pada Produk Pangan Dari Tepung Biji Durian Irwan Said; Baharuddin Hamzah; Jamaluddin Sakung; Purnama Ningsih; Poppy Fitra Wahyuni; Rezki Rezki
Media Eksakta Vol 19 No 1 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/me.v19i1.3663

Abstract

Durian seed flour can be used for the manufacture of food products such as sticks and steamed sponges. Sticks and steamed sponge cake are foods that many people like from children to adults.  Durian seed flour is rich in minerals including magnesium, potassium, calcium and phosphorus. This study aims to determine the content of magnesium, potassium, calcium and phosphorus in food products from durian seed flour using Atomic Absorption Spectrophotometer (SSA) and UV-Vis Spectrophotometry.   The results showed that the magnesium content in the sticks of durian seed flour with formulation 1 (0% durian seed flour) amounted to 84,053 mg/kg, formulation 2 (50% durian seed flour) amounted to 145,213 mg/kg and formulation 3 (100% durian seed flour) amounted to 142,313 mg/kg.  Potassium content on sticks from durian seed flour with formulation 1 (0% durian seed flour) of 1,186 mg/kg, formulation 2 (50% durian seed flour) of 1,863 mg / kg and formulation 3 (100% durian seed flour) of 1,693 mg/kg.  The calcium content in steamed sponge from durian seed flour with formulation 1 (0% durian seed flour) of 30.37 mg/kg, formulation 2 (50% durian seed flour) of 37.84 mg/kg and formulation 3 (100% durian seed flour) of 35.84 mg /kg. While the phosphorus content n steamed sponge from durian seed flour with formulation 1 (0% durian seed flour) of 17.1 mg/kg, formulation 2 (50% durian seed flour) of 27.1 mg/kg and formulation 3 (100% durian seed flour) of 24.3 mg/kg.
Analysis of Calcium (Ca) and Potassium (K) Levels in Mackerel (Rastrelliger sp.) Bones Ni Luh A. Murtini; Baharuddin Hamzah
Jurnal Akademika Kimia Vol. 9 No. 3 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2020.v9.i3.pp143-147

Abstract

Mackerel (Rastrelliger sp.) is one of the potential pelagic fish in Indonesia and in almost all Indonesian waters. In general, fish bones contain many essential ingredients for the body and can be processed into fish bone flour. This study aimed to determine calcium (Ca) and potassium (K) levels in mackerel (Rastrelliger sp.) bones. Calcium and potassium levels were determined using an atomic absorption spectrophotometry (AAS). Results of the analysis showed that the water, ash, and biomass levels of the sample were 10.53, 18.26, and 71.21%, respectively. Analysis of calcium and potassium levels at wavelengths 422.7 nm and 766.5 nm obtained an average of 508.15 and 36.37 mg/100g. The results indicate that the calcium level is higher than the potassium level in mackerel (Rastrelliger sp.) bones.
Determination of Total Flavonoid Contents and Antioxidant Activity of Leucaena Leucocephala Leaves's Extract Taupik Hidayat; Baharuddin Hamzah; Minarni R. Jura
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2020.v9.i2.pp70-77

Abstract

The study of the determination of total flavonoid contents and antioxidant activity of extract of Leucaena leucocephala leaves had been carried out using UV-Vis spectrophotometry method. This study aimed to determine the total flavonoid contents and the antioxidant power of Leucaena leucocephala extract. Extraction of chemical content from Leucaena leucocephala was carried out by the maceration method using absolute ethanol. The total flavonoid contents from the sample extract were taken up for absorption at wavelength 510 nm and 700 nm. The variation of the concentration of Leucaena leucocephala leaves' extract was respectively 20, 40, 60, and 80 ppm. The results of the study showed that the total flavonoid contents of extracts of Leucaena leucocephala leaves was 2.242 g/100 grams. The antioxidant activity of Leucaena leucocephala leaves extract was carried out using DPPH (1,1-diphenyl-2-picrylhydrazine) and the measurement of absorption was at a wavelength of 517 nm, and by varying the sample concentration. Positive control used was vitamin C solution with the same variation of extract's concentration. The results showed that the IC50 values of Leucaena leucocephala leaves extract and vitamin C were 175.388 and 28.907 ppm. Based on the IC50 data it can be stated that the antioxidant vitamin C was stronger than the Leucaena leucocephala leaves extract which was classified as a weak type of natural antioxidant.
The Effect of Copper(II) and Cadmium(II) Ions Against the Percent Mercury Ion Extraction Using Emulsion Liquid Membrane Technique Suhartini Musa; Baharuddin Hamzah; Daud K. Walanda
Jurnal Akademika Kimia Vol. 8 No. 4 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2019.v8.i4.pp218-222

Abstract

The effect of copper(II) and cadmium(II) ions on the percent of mercury ion extraction using an emulsion liquid membrane technique have been performed. This study used HNO3 as an internal phase, mixed span 80 and span 20 as a surfactant, benzoyl acetone as cation carrier, kerosene as membrane phase, and mercury solution as a sample solution. Variations of concentrations of copper(II) and cadmium(II) ions added were 10, 20, and 30 ppm with mercury concentrations of 30 ppm. The result of the research showed that the addition of copper(II) ion with concentrations of 10 to 30 ppm decreased the percentage of mercury ion extraction 30 ppm by 12.12% and the addition of cadmium(II) ion with the concentration of 10 to 30 ppm decreased the percentage of mercury ion extraction 30 ppm by 11.74%.
Emulsion Stability Tes and Effect of HNO3 Concentration in the Internal Phase on Cadmium Ion Extraction using Liquid Membrane Emulsion Technique Sahida Sahida; Baharuddin Hamzah; Siti Nuryanti
Jurnal Akademika Kimia Vol. 9 No. 1 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2020.v9.i1.pp34-39

Abstract

Study on the emulsion stability and cadmium ion extraction tests was performed using the liquid membrane emulsion technique. This study aimed to determine the emulsion stability between the membrane phase and the internal phase with the variation of the ratio (2:1, 1:1, 2:3, and 1:2), and to determine the maximum conditions of cadmium ion extraction in a solution including the various concentration of HNO3 solution 1, 1.5, 2, and 2.5 M. This study is a laboratory experimental method using benzoyl acetone compound as cation carrier, kerosene as membrane phase, HNO3 solution as the internal phase, span-20 and span-80 as surfactants, and cadmium solution as the sample solution. Cadmium ion concentration in the external phase was determined by UV-VIS spectrophotometer. The result showed that the emulsion stability test which produced the most stable emulsion was in the ratio of the membrane phase and the internal phase 1:1. In addition, the concentration of the HN03 solution resulted in a maximum extraction percentage of 1.5 M with an extraction percentage was 95.28%.
Analysis of Cyanide Contents in Cassava Leaves (Manihot esculenta Crantz) Based on Boiling Time with Formation of Hydrindantin Complex by Using UV-Vis Spectrophotometry Kadek N. Anjani; Baharuddin Hamzah; Paulus H. Abram
Jurnal Akademika Kimia Vol. 10 No. 1 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2021.v10.i1.pp49-52

Abstract

This study aimed to determine cyanide contents in cassava leaves (Manihot esculenta Crantz) based on boiling time with the formation of hydrindantin complex using UV-Vis spectrophotometry. The variation of boiling time was 0, 5, 10, and 15 minutes respectively. The cyanide content was prepared by extracting the sample using water for 2 hours. Then the sample was distilled to obtain a distillate that containing cyanide. Determination of cyanide was carried out by reacting samples containing cyanide with 1% ninhydrin and 0.5% Na2CO3, then adding 1 M NaOH to form blue hydrindantin compounds in an alkaline condition. Blue hydrindantin compounds formed were analyzed by spectrophotometry at a maximum wavelength of 590 nm. The results showed that cyanide contents in cassava leaves based on boiling time 0, 5, 10, and 15 minutes respectively were 20.73 ppm, 13.92 ppm, 9.18 ppm, and 3.38 ppm. The longer the cassava leaves were boiled, the better it was to be consumed because it will significantly reduce cyanide contents.
Model pergerakan udara pada lingkungan termal dalam bangunan dengan elemen air dan lansekap sebagai pengubah iklim mikro di iklim tropis panas dan lembab Hamdy, Muhammad Awaluddin; Hamzah, Baharuddin; Wikantari, Ria; Mulyadi, Rosady
ARTEKS : Jurnal Teknik Arsitektur Vol 8 No 2 (2023): ARTEKS : Jurnal Teknik Arsitektur | Mei 2023 ~ Agustus 2023
Publisher : Program Studi Arsitektur Fakultas Teknik Universitas Katolik Widya Mandira

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30822/arteks.v8i2.2138

Abstract

Thermal comfort in buildings is determined by several aspects of the climate, such as external and internal wind speeds. Therefore, this research aims to analyze the effect of water elements and vegetation as microclimate modifiers in buildings, to obtain thermal comfort through air velocity and flow analysis. In this context, the field analysis emphasized microclimate parameters. Two cases were also encompassed, namely the interior space of a residential building and a shopping center. By using field measurements with quantitative methods, data were obtained through the analysis of the PMV (thermal comfort index Predicted Mean Vote), PPD (Predicted Percentage of Dissatisfied), and TSV (Thermal Sensation Vote). This experiment was conducted to determine the influential levels of the building water and vegetation on comfort and the thermal environment. Data analysis was also processed using a statistical approach, with airflow being simulated through CFD (Computational Fluid Dynamics) method. The results showed that the air movement occurring in the building to the comfort and thermal environment, through architectural elements, reduced the temperature and humidity in the room. This was due to the heat radiation outside the building, leading to an impact on the effective air temperature for the thermal sensation of visitors. In this case, the movement of air in the building with the placement of architectural elements, such as water, vegetation, and good ventilation, was important for various activities. These activities included the following, (1) providing positive value, (2) improving the quality of the indoor environment, (3) maintaining the stability of the thermal environment at the building scale, and (4) achieving a comfortable thermal sensation.
Analysis of Thermal Comfort of Office Buildings (Case Study: Hasanuddin University Rectorate Building) Kamaruddin, Nurhayati Hayati; Hamzah, Baharuddin; Jamala, Nurul
EPI International Journal of Engineering Vol 7 No 1 (2024): Volume 7 Number 1, February 2024
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022024.06

Abstract

Thermal comfort is one of the fundamental aspects of indoor environmental quality and it is closely related to occupant satisfaction and energy use in buildings. The purpose of this research was to analyze the thermal conditions of the student affairs rooms (Interest & Talent Room and Student Meeting room) at second floor and the academic and education rooms (Academic Meeting room, Academic Registration room, and Head of Education and Evaluation room) at seventh floor of Hasanuddin University rectorate building. This study used a quantitative method using a survey where the researcher asked several respondents about the level of thermal comfort of the room occupants when the volume of air conditioner (AC) is increased gradually every day at 18o C, 22o C, and 27o C. In addition, measurements were conducted using HOBO from 08.00 – 17.00 to obtain data in the form of air temperature, humidity, and air velocity in the room. At the same time, respondents were asked to fill out a questionnaire asking the level of comfort felt by the room occupants at that time. The results showed that the average air temperature at 18o C is 24.62o C, humidity is 63.108% and air velocity is 0.144 m/s. At a temperature of 22o C, the average air temperature is 24.78o C, humidity is 60.684%, and the air velocity is 0.142 m/s. At a temperature of 27o C, the average air temperature is 25.97o C, humidity is 64.022%, and the air velocity is 0.127 m/s. The results showed that the respondents felt ‚cold‘ when the volume was at 18o C, they felt 'comfortable' when the volume was at 22o C, and they felt ‚neutral‘ when the volume was at 27o C. In the end, temperatures of 22o C and 27o C can be used as a reference in the use of air conditioning temperatures in the room.
Co-Authors Abdul Wahid Wahab Afadil Agustin Tiwow Alep, Boni Alizah, Nur Alwi, Nurul H. Amin, Alif Hidayatullah Anak Agung Istri Sri Wiadnyani Arwansyah Arwansyah Asisa, Nur Asniawaty Azzajjad, Muhammad Fath Bachtiar, Andi Ahmad Fauzan Baloga, Hendra Bangsawan, Nurul Jamala Bayu Riyadi, Bayu Cica Anisa Damayanti, Nur S. Daud Karel Walanda Delviana, Delviana Dia Afrianti Sangkota, Vivi Diharnaini Diharnaini Djahir, Ahmad Rifaldi Djasman, Syamsiar Masgul Duminggu, Priscilla Agatha Fadlian, Fadlian Fiskanita, Fiskanita Fitriani, Eva Frantauansyah, Frantauansyah Genefefa T., Fulgensia Hardani, Muhammad F. 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 M. Yogi Riyantama Isjoni Mangela, Yessika D. Minarni Rama Jura Muhammad Awaluddin Hamdy Muhammad Taufik Ishak Mustapa, Kasmuddin Nasution, Annio Indah Lestari Ni Luh A. Murtini Noor Jalaluddin Nurdin Rahman Nurhasanah Nurhayati Kamaruddin Nurul Jamala Pathuddin Paulus H. Abram Paulus Hengky Abram Poppy Fitra Wahyuni Pulukadang, Sri H. V. Purnama Ningsih Putri, Eska Perdanawati Kahar Rahim, M. Ramli Rahmawati, Rahmawati Rawal, Andi Resky Reny, Reny Reny, Reny Rezki Rezki Ria Wikantari Ririen Hardani Rosady Mulyadi Roy, Muh. S, Afadil Sahabuddin Sahabuddin Latif 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 Syukri , Muhammad Rijal Tahril Tamala, Sindy T. Taufik, Yusaumi Ramadhanti Fitri Taupik Hidayat Tiwow, Vanny Maria Agustina Tri Suci Lestari Tudjuka, Mora Delfita Tuljannah, Naima Widya Astuti