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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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Analysis of Nepenthes Hybrids in Taratak Hill, Pesisir Selatan Sumatera Barat by RAPD Technique Weni Enjelina; Mansyurdin Mansyurdin; Tesri Meideliza
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

The Study about Analysis of Nepenthes Hybrids in Taratak Hill, Pesisir Selatan Sumatera Barat by RAPD Technique had been conducted from May until November 2011. The study was done to prove natural hybrids of Nepenthes by RAPD technique and to determine the relationship of natural hybrids of Nepenthes with both parental. The research method is survey and observation. Isolation of DNA carried by CTAB method with modifications and amplification carried out by PCR. Hybrids and parental relationship was obtained from Jaccard similarity coefficient and displayed in a Dendogram (family tree) and PCO analysis to look genetic variation was processed with the program PAST 2.10. Proof of the natural hybrid N. ampullaria × N. mirabilis can be done by the RAPD technique using the primers OPA 15, OPK 16, OPK 19 and OPP 15. Natural hybrids between N. ampullaria × N. gracilis using the primers OPA 15, OPK 19 and OPP 15. The eighth of natural hybrids N. ampullaria × N. mirabilis were closer to N. mirabilis, while both natural hybrids N. ampullaria × N. gracilis closer to the N. Ampullaria.

Analysis Cracking Corrosion on Carbon Steel Pipes API 5L-X65 In Solution 7700 ml Aquades, 250 ml Acetic Acid and 50 ml Ammonia with Gas CO2 and H2S in Saturation Condition Nendi Suhendi Syafei; Darmawan Hidayat; Emilliano Emilliano; Liu Kin Men
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

The oil and gas industry exploration that will generally be followed by corrosive substances including sweet gas (eg H2S and CO2), it will result in corrosion event. The corrosion stress cracking will cause the carbon steel pipe to break so that production oil and gas can be stopped. The research aims in this paper is to analyze the corrosion event of carbon steel pipe in laboratory scale on acid environment with the existence of sweet gas H2O and CO2 by using three points loading method. This research uses carbon steel pipe API 5L-X65 which stay in condensation environment of 7700 ml aquades, 250 ml acetic acid and 50 ml ammonia, then filled sweet gas CO2 and H2S in saturated state. Based on the test results of microstructure and microscope polarized, there is a phenomenon corrosion stress cracking, i.e transgranular stress cracking corrosion and intergranular stress cracking corrosion. The accelerate corrosion that happened at the test sample will be greater if ever greater given deflection for the time of the same presentation. Crack deepness in the test of the test sample will deeper if ever greater given deflection. The cracks in the sample test will deeper if it was given stress σ greater for the same exposure time.

Mitigation of Land Movement using Self Potential Method in Ling-Anjung Region Sumedang Regency Budy Santoso; Setianto Setianto; M U Hasanah; B Wijatmoko; E Supriyana; H Mohammad
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Land movement occurs due to reduced soil strength which is affected by water pressure. The Self Potential (SP) method is a geoelectric method that can detect well the flow of groundwater. The Self Potential method can also be used to detect the presence of debris flow in the form of weathered soil, tuff sand, cobble gravel and other rock fragments that have mixed with water. Based on the results of the SP measurement, debris flow has a medium SP with a value (3 - 12) mV, rock that has shifted (sandstone associated with andesite fragment) has a SP value < 2mV, while water seepage and water flow has an SP value (13 - 36) mV.

Factor Analysis of Physics Chemistry Waters that Affects Damage Safety Cliff on the Outskirts of River Siak Marta Dinata; Fitridawati Soehardi
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

This research to identify the physics chemistry vegetation of water on the outskirts of the Siak in terms of quality of the siak river good chemically, physics and biology and the erosion on a cliff the siak good use cliff safety and still in the original condition. This research is descriptive condition of vegetation of the safety of the cliff on coasts of siak river. Data needed is the on the results water quality measurement both in terms of physics, chemical and biological the oxygen dissolved, CO2 free, pH water, the speed of the current of a river, the sample water for measurements total suspended solid and the measurement of temperature water and BOD5. Of precipitation data required to count the intensity of rain and to approximate discharge flood on the siak river that occurs , and data safety conditions cliff coasts of siak river.Then analyzed in order so as to produce data that can identify physics chemistry factors waters that affects vegetation herbs coasts of siak river. The result of physics chemistry research identified factors waters that affects vegetation plants and damage a retaining wall land on the outskirts of the siak river ( case study kecamatan tualang siak district there are fatty oil luminance an observation station and she sulphate high category that ranged 239,50-341,87 mg/L . Followed by the womb klhorida 14,0-24,4 mg/L , phospat 5,31-5,83 mg/L. Organic substances contained in these waters make the acceleration of damage a retaining wall land on the outskirts of the river with the increase the number of this chemical was every mg/L . With pH values within the range 6,1-6,8 in addition to the womb of copper and lead contained in the quality of water made the vegetation that dominated the study areas this is the family of lythraceae and combretaceae that the average is the type of mangrove need phospat high. In the high number of this type of vegetation dominated the outskirts of the river, causing the wall safety a cliff on the outskirts of the river destroyed by aerial roots spread.

Analysis of Heavy Metals Distribution in the River Town of Hamasaki's Rod Padangsidimpuan Fatma Suryani Harahap; Laila Tussifah Lubis
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Systems of waste management in Padangsidimpuan City is an open dumping system. The location of the Padangsidimpuan City landfill is carried out at the Batu Bola TPA located in Batu Bola Village which is 120 meters from the Batang Ayumi river flow. Continuous landfill in the landfill produces pollutants in the form of leachate. Leachate contains organic materials and heavy metals. Heavy metals that are often found in leachate water are Iron (Fe) cadmium (Cd) and Zinc (Zn). This research aims to know the quality of the water of the Batang Ayumi river in terms of the content of heavy metals Cd, Zn, and Fe. This research uses descriptive exploratory method by conducting a survey first. The determination of the sampling location using purposive sampling method at four stations specified. River water sampling is carried out twice, before and after rain. This research uses an Atomic Absorption Spectrophotometer tool. The data obtained were analyzed by comparing research data with water quality standards based on PP. No. 82 of 2001 to look at the conditions of the heavy metal pollution of Cd, Zn and Fe. The results of this study showed that the average concentration of the metal content Cd, Zn and Fe werw below the specified quality threshold, namely the concentration of metal Cd of all stations is 0.0009 mg/l, a concentration of metal Fe is 0.03 mg/l, and concentration of Zn metal is 0.0002 mg/l.

Some Operations on Mixed Monotone Operator in Banach Spaces Badrulfalah Badrulfalah; I Irianingsih; Khafsah Joebaedi
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

This paper discusses some operations on mixed monotone operator in Banach space, especially addition an multiplication operations. We will prove the sum and product of two mixed monotone operators. The proof using some relevant definitions. The result is the sum o of them is a mixed monotone operator and the product is too if both satisfy some conditions

First Order Space Time Autoregressive Stationary Model on Petroleum Data Khafsah Joebaedi; K Parmikanti; Badrulfalah Badrulfalah
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

First order Space-Time Autoregressive model is one of the models which involves location and time. STAR(1;1) model stationary can be used to forecast future observation at a location based on one previous time of its own location and the spatial neighborhood. STAR(1;1) model on petroleum productivity data in Balongan, Indramayu, West Java with eigenvalue less than 1. It indicates that STAR (1;1) model on petroleum productivity data in Balongan, Indramayu, West Java meets the stationary requirement

Fenthion Compound Degradation in the Pesticide Bayleton 500 ec in Sonolysis, Ozonolysis and Sonozolysis with Addition of TiO2-anatase Sofyanita Sofyanita; Zona Octaria
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Fenthion an active compound contained in EC 500 lebaycid pesticides that are toxic. To reduce the level of toxicity will be degradation in sonolysis, ozonolysis and sonozolysis with the addition of TiO2-anatase. Degradation results in sonolysis, ozonolysis and sonozolysis measured by UV-Vis spectrophotometer at wavelength of 400-600 nm. From the research that has been made degradation result fenthion 6 mg/L in sonolysis without addition of catalyst of 37.5% and with the addition of TiO2-anatase catalyst obtained for 65.12% of degradation for 60 minutes. In ozonolysis at the same time obtained percent degradation of 39.77% without the addition of catalyst and 81% with the addition of TiO2-anatase catalyst. Percent degradation fenthion compound without the addition of TiO2-anatase catalyst after a 60-minute sonozolysis obtained at 91.7%.

The Response of Jabon Seeds Germination (Anthocephalus cadamba (Roxb.)Miq.) against the Duration of Combustion and Illumination Vauzia Vauzia; Eliza Gusmira
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 19 No. 2 (2018): 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 research is to know the response of jabon seeds germination against combustion and ilumination. The design that is used is RAL with 2 factors in it. The first is from the duration of combustion and the second is from the illumination treatment. Based on the design, there are 10 combination of treatments and every treatment will be done 3 times so there will be 30 experiments for the total. The parameter that is observed is the duration of jabon seed germinating and the length of jabon’s root. The result of this research showed that the combustion factor, the illumination factor, and the interaction between combustion and illumination is mattered to the duration of jabon seed germinating. While the length of jabon’s root depends with the combustion factor and the illumination factor. The interaction between the duration of combustion and illumination will not affect the length of jabon’s root at all.

Addition Of Coleus Amboinicus, L Leaf’s Extract In Ration To Percentage Of Carcass, Abdominal Fat, Liver And Heart Broiler: Bahasa Inggris Nelzi Fati; R Siregar; Sujatmiko Sujatmiko
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 20 No. 1 (2019): 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 effect of giving coleus amboinicus, L leaf’s extract, on the percentage of carcass, liver, heart and abdominal fat and the level of coleus amboinicus,L extract which is appropriate in broiler feed. This research was conducted in labor and broiler enclosures of the Payakumbuh State Agricultural Polytechnic, from January to May 2018. The material was DOC, commercial food 311, corn, bran, soybean meal, fish meal and minerals, and the equipment used was cages and equipment. The design used is RAL with 6 treatments and 4 replications. The results obtained that the addition of coleus amboinicus, L extract, L did not affect significantly (P> 0.05) on the percentage of carcass and liver, while the administration of coleus amboinicus, L leaf’s extract significantly affected (P <0.05) on the percentage of heart and abdominal fat broiler. Giving a dry of coleus amboinicus leaf’s, L, 4 g / kg ration can reduce broiler abdominal fat.

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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