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Journal of Natural Sciences and Mathematics Research

JNSMR
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Published by Universitas Islam Negeri Walisongo Semarang

ISSN : 26146487 EISSN : 24604453 DOI : https://doi.org/10.21580/jnsmr

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Materials Science & Nanotechnology Physics

Journal of Natural Sciences and Mathematics Research, an international journal, provides a forum for publishing the original research articles, review articles from contributors, and the novel technology news related to natural sciences and mathematics research. Scientific articles dealing with fundamental sciences, material sciences, mathematics, materials characterization, etc. are particularly welcome. The journal encompasses research articles, original research report, reviews, short communications and scientific commentaries in fundamental sciences and mathematics including: fundamental sciences, fundamental physics, fundamental chemistry, fundamental biology, mathematics, applied sciences, applied physics, applied chemistry,applied biology,applied mathematics and materials characterization.

Arjuna Subject : Umum - Umum

Articles 6 Documents

Search results for , issue "Vol 5, No 1 (2019): June" : 6 Documents clear

Measurement of Friction Coefficient between Glass and Rubik's Beam on the Sloping Field using Rubik Lubricant Try Adi Sucipto
Journal of Natural Sciences and Mathematics Research Vol 5, No 1 (2019): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

This research is based on a rubik game involving the coefficient of friction. Rubik when difficult to rotate then the coefficient of friction is large. Rubik has several lubricants including Maru Lube, Ellips, and Kit Shampoo. This study aims to determine friction coefficient between the inclined plane of glass and rubik beams with lubricating. The beam is launched on an inclined plane and measured travel time. The results of the measurement of the coefficient of friction of the three lubricants namely Maru Lube lubricant has a coefficient of friction value of 0.4586, Ellips lubricant of 0.4375, and shampoo Kit lubricant of 0.4630. Based on these data it can be concluded that Ellips lubricant is the most slippery and more effective lubricant to use.

Effectiveness Analysis of the Utilization Liquid Smoke Distilled from Organic Materials as an Alternative for Fish Preservation Candra Dewi; Sulhadi Sulhadi; T. Darsono; E. D. Pratiwi
Journal of Natural Sciences and Mathematics Research Vol 5, No 1 (2019): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Liquid smoke is alternative preservation fish that does not cause pollution and does not damage the respiratory organs. Liquid smoke contains antibacterial and antioxidant so that it can preserve fish that have a fast rot character. This study aims to determine the characteristics and effectiveness of using liquid smoke as an alternative to preserving fish. The research method applied in preserving fish using liquid smoke is soaked; soaked and dried; and soaked and aerated. The variables in this study include the combination of bay leaves, lemongrass, and galangal; Pandan leaves; and tuna. The results showed that the characteristics of the liquid smoke of bay leaves, lemongrass and galangal and pandan leaves were almost the same clear color, the level of viscosity was like water, and the smell of smoke flavor each stung the distinctive aroma of organic matter. Based on data analysis, it was found that an effective way to use liquid smoke in replacing traditional fumigation was to soak it than dried in the sun. This is because soaking can increase antibacterial activity while drying can reduce water content in fish.©2019 JNSMR UIN Walisongo. All rights reserved.

Production of Brikueda (Briquettes from Teak Sawdusts and Durian Rind/Durio zibethinus) as Renewable Fuels Wihdatus Syarifah; Sulhadi Sulhadi; Teguh Darsono
Journal of Natural Sciences and Mathematics Research Vol 5, No 1 (2019): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Jepara is a carving city. The result of carving produces sawdust waste which is usually used to be sold and burned. In addition, durian fruit is available that has a distinctive taste and made an icon of one village in Jepara. The fruit is the belle of the whole community to be eaten by meat and made food. But the skin has the traits and characters that are difficult to decompose. Then the two wastes will be combined with tapioca flour into briquettes as an alternative fuel. This research take four stage: combustion, filtering, printing, and drying. Obtained two treatment, the first treatment is using ratio wood sawdust and durian rind; 50 gr: 50 gr; 25 gr: 50 gr; 50 gr: 25 gr. The results shown it does not ignite up and very hard. The second treatment is using same ratio but added 25 gram starch, the results shown it ignite. This is due to the starch content is used, it ignite the longest with a concentration ratio of 50 gr: 50 gr because its combination increases the calories value. In durian rind there are 3786 cal/g and teak wood consists mainly of cellulose (40-50%), hemicellulose (20-30%), lignin (20-30%), and the calories value of sawdust briquettes is 4714-5519 kcal/kg.©2019 JNSMR UIN Walisongo. All rights reserved.

Analysis of the Results of the Reduction of Cyanide Acid Content in Hevea brasiliensis Seeds Diah Ayu Kusuma Putri; Sulhadi Sulhadi; Teguh Darsono
Journal of Natural Sciences and Mathematics Research Vol 5, No 1 (2019): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Rubber seeds (Hevea brasiliensis) are part of rubber plants that have not been utilized optimaly. The content contained in rubber seeds is sufficient, including fat content of 68.53 g/100 g, proteins 17.41 g/100 g, and carbohydratees 6.99 g/100 g. However, the obstacle faced is the presence of toxic compounds found in rubber seeds namely cyanide acid (HCN) which is very dangerous if it enters the body. The purpose of this study is to find out the right treatment to reduce the content of cyanide acid so that the rubber seeds can be utilized. The research method uses experimental comparative. The variation used in the reduction process is to soak the rubber seeds respectively for 12, 24, and 36 hours by replacing the immersion water once every 2 hours, then boil the rubber seeds into 2 liters of water for 2 hours by replacing the boiled water for 1 hour. The results showed that the greatest decrease in cyanide acid content occurred during soaking for 36 hours with boiling for 2 hours.©2019 JNSMR UIN Walisongo. All rights reserved.

Production of Hand Washing Soap from Ethanol Extract of Fern (Pteridophyta), Nampong Leaves (Siegesbeckia orientalis) and Thistle Plants (Calotropis gigantea) Nuris Silvia; Shovi Amila
Journal of Natural Sciences and Mathematics Research Vol 5, No 1 (2019): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Soap is an ingredient that comes from natural oils or fats reacting with caustic soda in the process known as lathering or saponification. Hand washing soap from fern (Pteridophyta) as the main ingredient is one of the antiseptic soaps that will be made, by comparing the drug Spirulina to determine the level of anti-bacteria produced. This study uses a hot process method with a soap heating time of about 20 minutes and a heating temperature of around 80°C. The results of testing the quality of hand washing soap as an antiseptic that meets the test standards are organoleptic test, acidity test (pH), foam resistance level test, and skin irritation test. So it's good to use as a hand sanitizer to get rid of bacteria and germs. ©2019 JNSMR UIN Walisongo. All rights reserved.

Decrease of Free Fatty Acid Levels in Cooking Oil Using Sugar Cane Nasukwad Nasukwad; Alwi Ahmad Sulthon
Journal of Natural Sciences and Mathematics Research Vol 5, No 1 (2019): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Edible Oil has a fairly high economic value. Cooking oil is generally used for cooking. With the condition of oil prices increasing so many times it is necessary to recycle again so as not to pollute the environment. Used cooking oil has a lot of high free fatty acid content, so it is necessary to reduce fatty acids by using absorbent ingredients. Sugarcane bagasse can be used as a purification ingredient of used cooking oil by soaking. This study aims to determine the level of soaking bagasse against free fatty acid numbers. Variable immersion for 0 hours, 24 hours, 48 hours, and 72 hours. The results of the percentage of Free Fatty Acid (ALB) levels after done, soaking time for 0 hours is 0.36%, 24 hours is 0.34%, 48 hours is 0.33%, and 72 hours is 0.29%.©2019 JNSMR UIN Walisongo. All rights reserved.

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Hamdan Hadi Kusuma

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Journal of Natural Sciences and Mathematics Research Published by Faculty of Science and Technology Universitas Islam Negeri Walisongo Semarang Jl Prof. Dr. Hamka Kampus III Ngaliyan Semarang 50185 Website: https://journal.walisongo.ac.id/index.php/JNSMR Email:jnsmr@walisongo.ac.id

Location
Kota semarang,

Jawa tengah

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Hamdan Hadi Kusuma

Contact Email jnsmr@walisongo.ac.id

Phone -

Journal Mail Official jnmsr@walisongo.ac.id

Location Kota semarang, Jawa tengah INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Hamdan Hadi Kusuma

Contact Email
jnsmr@walisongo.ac.id

Phone
-

Journal Mail Official
jnmsr@walisongo.ac.id

Location
Kota semarang,

Jawa tengah

INDONESIA