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Eksakta : Berkala Ilmiah Bidang MIPA

eksakta
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Published by Universitas Negeri Padang

ISSN : - EISSN : 25497464 DOI : https://doi.org/10.24036/eksakta/

Core Subject : Science, Education, Agriculture, Social, Engineering,

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering

Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464) is an open access journal and peer-reviewed that publishes either original article or reviews. The journal is dedicated towards dissemination of knowledge related to the advancement in scientific research. The prestigious interdisciplinary editorial board reflects the diversity of subjects covered in this journal. Under the realm of science and technology, the coverage includes environmental science, pure and applied mathematics, agricultural research and engineering, biology, biotechnology, bioinformatics, Healthcare sciences (including clinical medicine, preventive medicine & public health), physics, biophysics, computer science, chemistry and bioengineering, to name a few. This Journal Is Published at 3 Month intervals on January-Marc, April-June, July-September and October-December

Arjuna Subject : Umum - Umum

Articles 310 Documents

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The Specific Growth Rate (SGR) Related to the Histology of Gonad and Liver of African Catfish (Clarias gariepinus) Supplemented with Curcumin and Thyroxine Hormone Rawung, Livana Dethris; Sunarma, Ade; Rayer, Debby J. J.
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 2 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

This study used catfish Clarias gariepinus as an experimental animal, which given supplementation of curcumin and thyroxine hormone. The results showed that during the reproductive period there was an increase in body weight of female catfish in line with the development of the gonads. Through the histology of the gonads, it appeared that oocyte development occurs over time.Â The results of liver histology showed a high activity of hepatocyte cells as indicated by the formation of vacuoles, as the storage site for vitellogenin, in their cytoplasm. Supplementation of curcumin and thyroxine was able to increase the specific growth rate of catfish, and the catfish group that given the combination treatment of curcumin supplementation (5 g.kg-1 of feed) with thyroxine hormone (0.1 mg.kg-1 of feed) showed the more optimal results.

Reliability Study of Oil and Gas Pipelines Using the Normal Distribution Method Suhendi Syafei, Nendi; Hidayat, Darmawan; Rohadi, Nanang; Joebaedi, Khafsah; Supriyana, Eddy
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Gas and oil pipelines have decreased function and damaged due to corrosion. This research aims to analyze and predict the life of gas and oil pipelines within a certain time span. The method used is a reliability study using a normal distribution. The analysis results show it is predicted that the pipe reliability probability in 2030 will decrease and the probability of failure will increase. The probability of reliability is 0.843572786617270 and the probability of failure is 0.156427213382730 in 2030. With the long distance pipeline, maximum depth as shown in the attachment the average thick remain is 0.2200 inches, the average corrotion rate is 0.0317 mm/year, with prediction thick remain from 2000 to 2030 in inches.

Community Attitude Toward The Behavior Of Reducing and Handling Plastic Waste In Water Sweet Beach Area, Padang City Hasibuan, Rira Fauziah; Syah, Nur Afrainin; Burhan, Ida Rahmah
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 2 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

The aim of the study was to describe people's attitudes towards the behavior of reducing and handling plastic waste in the Air Manis Beach area of Padang City. This research method uses a qualitative approach in the form of grounded theory. The data were analyzed in two stages, namely concept formation and concept development. The results of the study describe people's attitudes towards the behavior of reducing and handling plastic waste as seen from: (1) the degree of public knowledge about plastic waste reduction and management; (2) public understanding of the impact of plastic waste; (3) cultural values believed by the community.

Isolation of Cellulolytic Microbes from Bio-Slurry Muammar, Arief; Manullang, Maria; Arjuna, Mesha; Retnaningrum, Endah
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Cellulolytic microbes produce cellulase enzymes that can degrade cellulose. Cellulolytic microbes are found in many habitats, including in cattle waste (bio-slurry), which is result of hydrolysis of cattle feed ingredients sourced from cellulose. Cellulase enzymes play a role in the process of hydrolyzing cellulose into glucose. This study aims to isolate cellulolytic microbes from bio-slurry and measure activity of cellulase enzymes in cellulolytic microbes isolated from bio-slurry. We are taking bio-slurry samples with 5 sample points and isolating the microbes in Carboxyl Methyl Cellulose (CMC) medium, cellulase enzyme activity qualitative test with Congo Red Assay, and perform quantitative test with the DNS Assay. Microbial isolates which shows positive results for cellulolytic activity in the qualitative test called SIIC1, SIIIC5, SIIC3. In the quantitative test can be seen based on Optical Density (OD) for cell lysate, SIIC1 0.298; SIIC3 0.186; SIIIC5 0.247; and a 0.332 for blank solution. Whereas supernatant obtain SIIC1 value of 0.237; SIIC3 0.212; SIIIC5 0.198; and 0.195 for blank solution. Based on the results, it can be concluded that the cellulolytic activity of microbes in bio-slurry based on OD values shows good results in supernatant, but itâ€™s not significant enough in the cell lysate.

The Effect of Graphite Concentration in TiO2 Semiconductors on Efficiency of Dye Sensitized Solar Cells (DSSC) Using Dye Melastoma malabathricum L Fruit Extract Riski Gusti, Diah; Mastutik, Diah; Lestari, Intan; Walidatur Rofiah, Yuliana
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

The effect of graphite mass in TiO2 semiconductors on the efficiency of Dye-Sensitized Solar Cell (DSSC) based on dye extract of Melastoma malabathricum has been investigated. This study aims to determine the effect of mass variations of graphite-TiO2 on the efficiency of DSSC and bandgap produced in the manufacture of DSSC. The mass variation of graphite added in TiO2 semiconductors is 10%, 12%, 14%, and 16% of the mass of TiO2. The result shows the maximum wavelength (Î»max) for anthocyanin at 544 nm with an absorbance of 5.7 Ã. The calculation results obtained by the optimal bandgap value in the variation of graphite mass 14% is 3.15 eV. The results of characterization using XRD obtained tetragonal TiO2 crystal structure with a particle size of 49.8 nm. The DSSC test results obtained optimal results found in mass variations of 14% graphite with a current strength of 140,001 Î¼A, a voltage of 1446.9 mV, and DSSC efficiency of 0.2026%.

Growth Studies of Cucumber (Cucumis sativus L.) Varieties Plants by Bamboo (Dendrocalamus asper) Flour Organic Fertilizer Zahanis, Zahanis; Ernita, Milda; Kardila, Evi; Herman, Welly; Resigia, Elara
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

The aim of the study was to analyze the interaction between the concentration of bamboo shoots of liquid organic fertilizer and cucumber plant varieties on the growth and yield of cucumber plants. This experiment used a Completely Randomized Design (CRD) with two factors. The first factor is the type of cucumber plant varieties, Wulan F1 variety and Mercy F1 variety. The second factor is the addition of Bamboo Shoots POC which consists of 4 levels, 0, 50, 75 and 100 ml/liter of water. The parameters observed were stem length, age of first flower appearance, age of first harvest, number of planting fruit, fruit diameter, fruit length, fruit weight of crop, fruit weight per plot and per hectare. Based on the results of the experiment, it can be concluded that giving bamboo shoots POC 100 ml/liter of water can increase the growth and yield of cucumber plants reaching 47.31 tons/ha.

Accidental Sampling Study on Quality of Life for Diabetes Mellitus Patients and Family Support System Afnuhazi, Ridhyalla; Hendrawati, Hendrawati; Ahsan, Ahsan; Putri Andayani, Rifka; Purnamasari, Devi
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Family support is a major factor in maintaining metabolic control that will affect quality of life. The research objective was to determine the relationship between family support and quality of life for people with diabetes mellitus. This research is a cross sectional study using the Accidental Sampling method. It was conducted at the Puskesmas Kebun Sikolos with a total of 90 respondents. The statistical test used was chi-square. The results of statistical tests showed a relationship between family support and quality of life for people with diabetes mellitus with a value of p = 0.000 (<Î±0.05). So it can be concluded that there is a relationship between family support and quality of life for people with diabetes mellitus.

Stem Anatomical Variation of Genus Gyrinops (Thymelaeaceae) in Sulawesi Karmilawati, Karmilawati; Mulyaningsih, Tri; Muspiah, Aida; Ito, Michiho
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

The purpose of this study was to determine the variation of the stem anatomical structure (i.e. cortex: sclerenchyma, phloem; xylem: trachea, rays, interxylary phloem and wood parenchyma; and pith) of Gyrinops (Thymelaeaceae) in Sulawesi. The method of this research was descriptive exploration. Stem agarwood sample came from several regions areas of Sulawesi which were collected by Agarwood Research Center Laboratory, Faculty of Mathematics and Natural Sciences, University of Mataram. The slide methods were used fresh slides. The results of this research showed there were 1 species of Gyrinops decipiens Â and 3 species of Gyrinops sp., with various anatomical characters in G. decipiensÂ and Gyrinops sp. in terms of the position, diameter and percentage of pith thickness; cortical sclerenchyma pattern and arrangement of wood parenchyma. There were also variations in cortical thickness; diameter, frequency and arrangement of trachea; frequency of rays; diameter, and interxylary phloem frequency; pith diameter; and the position of Ca-Oxalate in Gyrinops sp. 3 with Gyrinops sp. 1 and 2, while Gyrinops sp. 2 with Gyrinops sp. 1 there were found 5 variations such as the diameter, frequency and arrangement of trachea; arrangement of rays and interxylary phloem length.

Utilization of Dry Cocoa Pod Husks as an Antioxidant-Rich Herbal Drink Fitri, Ernarisa; Effendi, Effendi; Azra, Azmi
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 2 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Cocoa (Theobroma cacao L) production in Indonesian has increased every year, therefore more cocoa pod husks are produced. Currently, the use of cocoa pod husks is still very limited, even most farmers only dump the pods and turn them into plantation waste which will later become new problems in the plantation environment, such as causing bad smell and spreading diseases to healthy cocoa. Even if there is use of cocoa pods, at this point it is only used for animal feed and compost. In fact, cacao pod husks contain flavonoids and phenolic compounds which have high levels of antioxidant activity which are very beneficial fot the health. Based on the results of the sample analysis test using the FTIR and XRF instrument, there are functional groups that contain antioxidants and based on the XRF test, the pods of cocoa also contain several minerals, including 60,69% potassium and 24,56 calcium. Antioxidants can prevent the activity of free radicals which are the main causes of degenerative diseases. Therefore, cacao pod husks are very useful for making herbal drinks by drying and pounding them into a homogeneous powder product.

Potential Hydrophobic Pocket of Squalene Synthase: An In Silico Analysis Amelia, Fitri; Hidayat, Basultan; Iryani, Iryani; Iswendi, Iswendi
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 1 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Cardiovascular disease cases increase due to consumption cholesterol dietary habit. It is well-known that squalence synthase (SQS) is the first committed enzyme for cholesterol synthesis. Therefore, SQS become target of anti-cholesterol. This paper aims to determine the potential binding pocket of SQS (PDB ID: 1EZF). Dogsitescorer, siteFinder, and DEPTH were used for binding pocket prediction and MOE 2009.10 was performed for molecular docking. We found that there are five out of 37 pockets which have druggability score above 0.8. Pocket_5 is the highest drugability and favorable for hydrophobic interaction, yet lower number of hydrogen bond with the ligand. However, Pocket_2, and Pocket_3 are suitable for hydrogen bond formation of ligand-protein. Molecular docking study showed that TAK-475, D99, and Cynarin inhibitors were embedded on the P_2 and P_3 of SQS, showing that P2_and P3 are promising binding pocket for ligand interactions. These results show a promising alternative to design anti-cholesterol using these potential pocket in silico.

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Rahadian Zainul

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rahadianzmsiphd@fmipa.unp.ac.id

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+6281261385385

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eksakta@ppj.unp.ac.id

Editorial Address
Jl Prof Dr Hamka Air Tawar Barat

Location
Kota padang,

Sumatera barat

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Rahadian Zainul

Contact Email rahadianzmsiphd@fmipa.unp.ac.id

Phone +6281261385385

Journal Mail Official eksakta@ppj.unp.ac.id

Editorial Address Jl Prof Dr Hamka Air Tawar Barat

Location Kota padang, Sumatera barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Rahadian Zainul

Contact Email
rahadianzmsiphd@fmipa.unp.ac.id

Phone
+6281261385385

Journal Mail Official
eksakta@ppj.unp.ac.id

Editorial Address
Jl Prof Dr Hamka Air Tawar Barat

Location
Kota padang,

Sumatera barat

INDONESIA