International Journal of Natural Science and Engineering

The Influence of Temperature and Storage Time on Alcohol Content of Pineapple Infused Arak Bali

Gusti Ayu Made Ratih, Putu Ayu Suryaningsih — Wed, 01 Nov 2023 00:00:00 +0000

The development of gastronomic drinks from local cultures is an interesting potential, especially in terms of traditional drinks such as Balinese Arak. However, the sustainability of alcoholic beverage products such as Arak Bali can be affected by various factors, including temperature and storage time. This study aims to investigate the effect of temperature and storage time period on alcohol content in Balinese Arak infused with pineapple. This study used the Quasi Experimental method with a Complete Randomized Design (RAL) design of 2 factors, namely temperature factors and storage time factors. The results of the analysis showed that the Methanol content in the Bali Arak sample had negative results. In samples stored at 1ºC–8ºC for 7, 14, 21, and 28 days, the Ethanol content ranged from 16.38% to 17.27%. Meanwhile, samples stored at temperatures of 24ºC–30ºC during the same period had Ethanol content ranging from 17.27% to 20.49%. The results of statistical analysis using Two Way Anova show that there is a significant influence of temperature and storage time on alcohol content in Balinese Arak infused with pineapple. The results of this study provide further understanding of the factors that influence the stability and characteristics of traditional drinks such as Balinese Arak, and can be a guide in the development of sustainable and quality alcoholic beverage products.

The Relationship of Facial Skin Personal Hygiene to The Onset of Acne (Acne Vulgaris) in Adolescent Boys

Indah Sri Damayanti, Prima Minerva — Wed, 01 Nov 2023 00:00:00 +0000

Acne is a common problem that often occurs at a young age and is influenced by factors such as climate, hygiene, cosmetic use, age, race, diet, gender, and genetics. This research was conducted at SMAN 1 Pangkalan Koto involving 155 male students. Of these, 111 students (71%) experienced acne problems. The purpose of the study was to assess the relationship between facial skin hygiene (Personal Hygiene) with the incidence of acne vulgaris in adolescent boys at SMAN 1 Pangkalan Koto Baru. The research method used is correlation analytics with a cross-sectional design. The independent variable is personal hygiene, while the dependent variable is the incidence of acne vulgaris. The study sample consisted of male students who had acne vulgaris and met the research criteria. Primary and secondary data were collected through questionnaires. Data analysis was carried out by univariate and bivariate analysis methods. The results showed that around 51.6% of adolescent boys at SMAN 1 Pangkalan Koto Baru experienced moderate acne vulgaris. Their level of personal hygiene was also categorized as moderate, with 69.4% of respondents having a similar level of hygiene. The results of the analysis showed a significant relationship between facial skin hygiene and the incidence of acne vulgaris in adolescent boys at SMAN 1 Pangkalan Koto (Sig. Pearson Chi-Square: 0.021 < 0.05).

Implementation of the Simple Multi-Attribute Rating Technique (SMART) for Decision Making on the Selection of the Best Prospective Employee

Mihuandayani, Rida P. Sanggilalung, Supit Mamuaya — Wed, 01 Nov 2023 00:00:00 +0000

Human resource management is the important part of the company, it can affect the success of the company. In the process of selecting new employees at the company, several problems often occur such as ineffective time, the company still sorts out the prospective employee files conventionally and then compared them with other files for assessment, so it took a long time because there are many applicants who apply with different quality. In addition, there can be subjectivity to the data from the assessment results of prospective employees for certain reasons such as having emotional closeness with stakeholders. It needed a system to handle these problems such as Decision Support System (DSS). This study proposed the Simple Multi-Attribute Rating Technique (SMART) approach in evaluating prospective employees. There are five criteria used in this study, namely written tests, interviews, education, award certificates, and work experience. This decision support system can help stakeholders, especially the head of the company's branches, to determine the best candidate for employees with accurate and objective results. In this research, a comparison was also made between the SMART method and a manual system, which obtained an accuracy rate of 91.33% with the proposed method. The SMART method can be an effective and reliable option for selecting job candidates, as it can minimize errors and improve recruitment efficiency, thereby positively impacting company productivity and employee performance.

Gamma Spectroscopy Prototype Design to Identify Radioactive Elements

Wed, 01 Nov 2023 00:00:00 +0000

The identification system for radioactive elements used the single-channel analyzer (SCA) gamma spectroscopy method. However, the process of producing the spectrum was still quite long because it had to go through the process manually by scanning its energy; one of the other radioactive elements is gamma spectroscopy. This research aims to develop a prototype gamma spectroscopy that allows the identification of radioactive elements. In this study, researchers used an experimental method by designing a gamma spectroscopy prototype consisting of a 2.5 cm diameter NaI(TL) detector equipped with a photomultiplier, high voltage module, preamp module, pulse shaping module, sample hold module, and Atmega microcontroller with an LCD display resolution of 128 × 64. The results of testing this prototype were carried out with various radioactive samples. Researchers managed to identify radioactive elements by measuring electrical pulses produced by NaI(TL) detectors. Background counting, which is the result of enumeration from detectors without radioactive material, was identified and eliminated. The distribution pattern has a random nature, the energy resolution of the spectroscopy consists of 1024 channels, and the counting time can be set as needed via the reset button. The main finding of the study was that the gamma spectroscopy prototype was able to provide a clear picture of the energy spectrum of nuclear radiation, allowing good identification of radioactive elements. The results of this study have important implications in the field of identification of radioactive elements and can be used in a variety of scientific and industrial applications involving nuclear radiation.

Leucocyte Value as a Signs of Microvascular Inflammation in Type 2 Diabetes Mellitus Patients

Ria Amelia, Fadila Aulia, Danny Luhulima — Wed, 01 Nov 2023 00:00:00 +0000

Problems in the pathogenesis of Type 2 Diabetes Mellitus (T2DM) to complications are often overlooked, and routine blood tests are rarely performed in individuals with T2DM. Inflammation is an important early sign for detecting complications. One of the factors that can be used as an indicator of inflammation is the value of leukocytes. The purpose of this study was to assess leukocyte counts in patients with T2DM as a sign of inflammation in T2DM patients. This study used a cross-sectional approach method, with data analyzed descriptively and correlative using SPSS software. The subjects of the study involved residents assisted by the Kota Baru and Kalibaru Health Centers who suffered from DMT2 in the period from January to February 2019. The results of the Pearson test showed a value of p = 0.49, which indicated that there was no significant relationship between leucocytosis and blood glucose levels. The conclusion of this study is that the high number of leukocytes in T2DM patients is thought not to be caused by high blood glucose levels, but may be influenced by other factors related to the development of complications of T2DM disease. This research has important implications in understanding the pathogenesis and prevention of complications of T2DM.

Groundwater Quality Analysis Based on Physical Properties of The Gunungtiga and Surrounding Areas

Wed, 01 Nov 2023 00:00:00 +0000

Gunungtiga area has never been studied for the quality of groundwater, and residents have also complained about the quality of groundwater, these became the basis for selecting the research location. This study aims to analyze groundwater quality in the Gunungtiga Region, Lampung Province. Quantitative approached was used for this research, it was carried out by mapping the groundwater level to estimate the recharge area and collecting data on parameters of the physical properties of groundwater, including color, taste, odor, temperature, pH, TDS, and EC. The physical properties approach was selected because it is relatively cheap and easy to observe, the data collection can also be done in situ. The physical property parameter data is then checked based on the Republic of Indonesia Minister of Health Regulation No. 492 of 2010. The observations at 14 points showed that the groundwater level in the research area is relatively shallow towards the west or in the direction with higher topography, so it can be interpreted as a recharge area, and it flowed towards the east area which has lower topography. The physical properties of the groundwater had no taste, odor, or color. The EC value ranges from 188.07 to 1066.82 µs/cm, including fresh water, the pH ranges from 5.41 to 7.5, the temperature ranges from 27.2 to 29.7 0C, and the TDS value ranges from 94. 04-542.91 mg/l. Of the 14 observation points, only 1 location met the quality standards, namely 22/DP/02. Treatment is required before groundwater can be used, such as filtering.

Sarung Tangan Pemeriksa Kesehatan Ayam Pedaging (SASETAN) Terintegrasi dengan Teknologi Arduino Uno

Tue, 25 Jul 2023 00:00:00 +0000

Ayam pedaging mempunyai sifat genetik yang cepat dalam pertumbuhan, tetapi sangat rentan terhadap penyakit yang diakibatkan oleh mikroorganisme, hal ini menyebabkan para peternak ayam pedaging mengeluh akan kematian ayamnya secara tiba tiba. Para peternak ayam pedaging biasanya memeriksa kesehatan ayamnya dengan mengamati secara lansung, namun hal tersebut kurang efektif karena, jika hanya melihat dari segi tampilan fisiknya saja tidak menjamin kesehatan dari ayam itu sendiri. Tujuan penelitian ini adalah untuk menganalisis serta mengatasi permasalahan kesehatan ayam pedaging, dengan inovasi yang juga bertujuan untuk meningkatkan ketahanan pangan di Indonesia melalui peningkatan kualitas ayam pedaging. SASETAN merupakan sebuah inovasi dengan mengguakan metode penelitian kuantitatif serta melakukan percobaan kepada subjek ayam sebanyak 30 ekor ayam pedaging. Mekanisme kerja SASETAN meliputi input (sensor suhu, sensor detak jantung dan sensor suara), process (Arduino), dan output (LCD dan Buzzer) dengan data interval pembacaan Sensor Suhu 37-41; Sensor Detak Jantung 250-470; dan Sensor Suara adalah 18–23. Dan dari hasil percobaan yang telah kami lakukan, teknologi SASETAN dapat membantu para peternak ayam pedaging untuk mendeteksi kesehatan ayam sejak dini dan bisa mengurangi kerugian dari para peternak ayam pedaging. Berdasarkan analisis kelayakan teknis, teknologi SASETAN memiliki ketepatan dibandingkan sistem pengamatan secara langsung, serta memiliki kepraktisan dalam penggunaan. Implikasi hasil temuan ini adalah pengembangan teknologi SASETAN dapat memperbaiki efisiensi dan kesejahteraan hewan dalam industri peternakan ayam pedaging.

The Effect of Graphene Oxide Biomass as Filtration Loss Control Agent of Water-Based Mud Fluid

Mursyidah, Nur Hadziqoh, Hasnah Binti Mod Zaid, Foni Rahmayeni — Fri, 22 Dec 2023 00:00:00 +0000

Water-based drilling fluids are complex chemical systems that are essential for water drilling excavation. Biomass of Graphene Oxide (GO) is a submicrometer-thick material with unique and specific properties. GO can be entirely impermeable to liquids, vapors, and gases. It has water dispersibility and a huge specific surface area that is the potential material suitable for filtration loss control agents of water-based mud fluid. This study aims to analyze the effectiveness of Oil Palm Shell Graphene Oxide Biomass as an additif material to filtration control in water-based mud fluid. Making GO biomass sample starts from biomass Oil Palm Shell into graphite biomass, then the graphite biomass was sinthesized using an ultrasound-assisted liquid Phase Exfoliation (LPE) method to obtain thin GO biomass. Graphite biomass and GO biomass were characterized using FTIR, UV-Vis Spectroscopy and SEM-EDX. Drilling fluid samples with graphite biomass and GO biomass were prepared by adding 0.5 gr Graphite biomass and GO biomass into the based fluid (water-based bentonite fluid), The Filtration loss and the mud cake thickness of all the samples are measured and compared. Based on the measurement results, GO biomass additive is very effective in reducing fluid loss compare to graphite biomass additif. The volume of fluid lost was decreases from 13.9 ml to 10.8 ml compare to graphite biomass which was only able to decrease it to 12,3 ml.