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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
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Journal of Natural Sciences and Mathematics Research
Published by Universitas Islam Negeri Walisongo Semarang
ISSN : 26146487     EISSN : 24604453     DOI : https://doi.org/10.21580/jnsmr
Core Subject : Science, Agriculture,
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 7 Documents
 1 
Search results for , issue "Vol 6, No 1 (2020): June" : 7 Documents clear
Anti-tumor and anti-cancer activity test from Nabeez Ajwa Dates (Phoenix dactilifera L.) water Merdiana Dyah Safitri; Anita Fibonacci; Rais Nur Latifah
Journal of Natural Sciences and Mathematics Research Vol 6, No 1 (2020): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2020.6.1.11154

Abstract

Nabeez dates water is one of the fruits that is used as infused water. Dates contain flavonoids, phenols, alkaloids, and beta D-glucans which have anticancer and anti-tumor activity. Ajwa Dates have a higher phenol content than Sukkari Dates and Khalas Dates. Cancer is the number 5 deadliest disease in Indonesia and number 2 in the world after cardiovascular disease. The use of natural ingredients is an alternative for the treatment of this disease. One of the natural ingredients can be used is ajwa dates. The method of testing for anti-tumor and anti-cancer activity uses the Brine Shrimp Lethality Test (BSLT) method with shrimp larvae of Artemia salina leach as animals for testing. The results showed that the water of ajwa nabeez dates immersion for 24 hours, 48 hours, and 72 hours has the potential as anti-tumor and anti-cancer because it has an LC50 value of 676.39 ppm; 720.84 ppm; and 903.20 ppm. Phytochemical test results have shown positive samples containing tannins, phenolics, flavonoids, saponins, and alkaloids. The test results of FTIR spectophotometry resulted in the appearance of wave numbers indicating the presence of functional groups -OH, C-H, C = O, C-C (sp3), and C-O.©2020 JNSMR UIN Walisongo. All rights reserved.
Test the characteristics of essential oils of fragrant Lemongrass stems and clove leaves as an electric mosquito repellent Aisyah Suwaiya; Indah Lestari
Journal of Natural Sciences and Mathematics Research Vol 6, No 1 (2020): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2020.6.1.11155

Abstract

Essential oils from the stems of citronella and clove leaves contain chemical compounds, namely citronellal, eugenol, and geraniol, which function as mosquito killers. This study aims to make essential oils from fragrant lemongrass stems and clove leaves using the distillation method. Characteristic tests were carried out in the form of determining color, density, aroma resistance, and mosquito repellency of essential oils. The results of the color determination test showed that the essential oil from clove leaves was more brown in color and the density was greater than the essential oil from the citronella stem oil, while the durability of the aroma in the citronella oil was longer than that of the clove leaf oil. In testing the repulsion of mosquitoes, observations were made for 20 minutes to determine the number of dead mosquitoes, then the value of repulsion (DT) was calculated using probit analysis. The results of the mosquito repellent test showed that the DT value of the essential oil from the citronella stem was 60%-67%, the essential oil from the clove leaf was 54%-60%, while the mixture of the essential oil from the citronella stem and clove leaf was 67%-80 %. This shows that the essential oil from a mixture of citronella stems with clove leaves is able to kill mosquitoes better than only essential oils from citronella stems or clove leaves.©2020 JNSMR UIN Walisongo. All rights reserved.
Test the effectiveness of Breadfruit (Artocarpus altilis) leaf extract on the growth of Staphylococcus aureus Fitrotin Azizah; Anindita Riesti Retno Arimurti; Dita Artanti; Yeti Eka Sispita Sari
Journal of Natural Sciences and Mathematics Research Vol 6, No 1 (2020): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2020.6.1.11151

Abstract

Infectious diseases caused by Staphylococcus aureus are a health problem in Indonesia. Antibiotics can be used as the treatment, but currently Staphylococcus aureus is resistant to antibiotics. Therefore, it is necessary to find alternative medicine. One of the plants that has characteristics to be used as herbal medicine is Breadfruit leaves. The purpose of this study was to determine the effect of concentration on breadfruit leaf juice which can inhibit the growth of Staphylococcus aureus bacteria. This type of research is experimental. The study population was pure Staphylococcus aureus bacteria on NAS (Nutrient Agar Slant) media. The sample in this study was pure Staphylococcus aureus transferred from pure culture media (NAS), while the number of repetitions of the sample was 5 times the treatment, in this study were P1 (100%), P2 (75%), P3 (50%), P4 (25%), P5(0%). Data on the growth of Staphylococcus aureus bacteria was obtained by indirect observation, namely through laboratory tests and data collection techniques using the ANOVA test with an error rate (0.05) and followed by the Tukkey HSD test through the SPSS16.0 program. Based on the results of the antibacterial test of breadfruit leaf juice (Artocarpus altilis) in the ANOVA test, the probability number was 0.000 and there was an effect on the growth of Staphylococcus aureus bacteria. Followed by the Tukkey HSD test, it was obtained at a concentration of 25% which is the minimum inhibitory power, the effective concentration to inhibit the growth of Staphylococcus aureus at a concentration of 75%. From the data above, it can be concluded that there is an effect of breadfruit leaf juice (Artocarpus altilis) on the growth of Staphylococcus aureus.©2020 JNSMR UIN Walisongo. All rights reserved. 
Eugenol isolation of Clove (Syzygium aromaticum) flower Heru - Nurcahyo; Rizki Febriyanti; Purgiyanti Purgiyanti
Journal of Natural Sciences and Mathematics Research Vol 6, No 1 (2020): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2020.6.1.3335

Abstract

The use of alternative and complementary therapies as a treatment is growing rapidly, one of them is by alternative medicine that uses steam from essential oils / essential oils from various kinds of plants that can be inhaled and smeared to cure various conditions. Clove plants (Syzygium aromaticum) are one of the producers of essential oils that can be used as an alternative treatment for herbs. In clove oil consists of several types of components. The main component possessed by clove is eugenol which has the highest number among other components. Eugenol are important compounds in clove oil. It is a clear liquid to pale yellow compound with a refreshing and spicy aroma like dried clove flowers, giving a distinctive aroma to clove oil. The purpose of this study was to determine the eugenol content of clove flower essential oil. The use of clove flowers in this study is used to improve the competency of local products that in the future can make the outputs of competitive and economical value. This study begins with the distillation process of clove flower water to get oil up to isolation of eugenol. The identification of eugenol with TLC and testing of eugenol levels with GC-MS. The results showed that the essential oil yield was 3.16%, eugenol yield 42.92%, hRf value 11.46 and with grade 97%.©2020 JNSMR UIN Walisongo. All rights reserved. 
Analysis of Axial CT-Scan image of COVID-19 patients based in gender using the Otsu Thresholding method Melany Puspa Damayanti; Heni Sumarti
Journal of Natural Sciences and Mathematics Research Vol 6, No 1 (2020): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2020.6.1.11152

Abstract

At the beginning of 2020, the world was shocked by the emergence of the COVID-19 virus. This virus has spread to all corners of the world, not only in Indonesia. Therefore, the government needs to make efforts to break the chain of transmission of this virus. One of these efforts is to detect COVID-19 as early as possible. Using CT images can be one of the early detection efforts of early-phase lung infections in COVID-19 patients. The stage in detecting COVID-19 is by segmenting the image. In this study, segmentation was carried out using the Otsu Thresholding method on 8 axial CT images of the lungs of COVID-19 patients, consisting of 4 images of male patients and 4 images of female patients. Then the image segmentation results of male and female patients were compared and evaluated using ROC measurements, Threshold (T) values and analyzed for GGO (grand-glass opacity). The result can be seen that judging from the value of the ROC measurement results, the measurement of image segmentation evaluation of male patients is more accurate than female patients. The number of false negatives for male patients and female patients is the same, while the number of false positives for male patients is less than female patients. Threshold value of the image segmentation results of male and female patients is the same so that the density of image segmentation is the same. GGO (grand-glass opacity) for male COVID-19 patients aged between 45-55 years is fuller than female COVID-19 patients aged 45-55 years. This shows that men are more at risk of dying from COVID-19 than female.©2020 JNSMR UIN Walisongo. All rights reserved.
Calculation of Tabarru Funds Using Makeham's Mortalita Law and Gompertz's Mortalita Law Using the Cost Of Insurance Method Tauki Rohman Muzaki; Emy Siswanah; Seftina Diyah Miasary
Journal of Natural Sciences and Mathematics Research Vol 6, No 1 (2020): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2020.6.1.11156

Abstract

Tabarru funds have the meaning of a collection of funds given by insurance participants as a virtue fund with sincere intentions for the purpose of helping one participant with another if one of them gets a disaster. The tabarru fund management mechanism in Indonesia uses two types of operational systems, namely the product saving system (savings) and the non-saving product system. Management with a saving product system uses a savings mechanism with 5% for management funds. Meanwhile, in the non-saving product system with a no-savings mechanism, the amount and its management are not yet known, which will cause confusion for the community in the calculation. The cost of insurance method is one method that can be used to calculate tabarru funds. This method calculates tabarru funds by multiplying the percentage of tabarru funds by the cost of coverage. The percentage of tabarru funds is searched through the mortality table, management fee, and investment level. From the management fee of 25% and the investment rate of 5%, the percentage of tabarru funds using Makeham's mortality law is  for men and for men. Meanwhile, Gompertz's law of mortality obtained  for men and for women . ©2020 JNSMR UIN Walisongo. All rights reserved.
The effect of Milling Time on Crystal size Sandvik Sanergy Qolby Sabrina; Ahmad Afandi; Nurhalis Majid
Journal of Natural Sciences and Mathematics Research Vol 6, No 1 (2020): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2020.6.1.11153

Abstract

Preliminary study material sandvik sanergy as an alternative material for interconnect applications solid oxide fuel cell (SOFC) have been conducted. Sandvik sanergy was milled for 0, 8, 24, and 48 hr with ball milling planetary MTI Corp. The physical properties of small grain size can affect the strength of the alloy when applied as interconnect. In this study, ratio between ball miller and sandvik sanergy was 1:10 aiming to obtain a small grain size. Crystal size characterized by XRD Rigaku Smartlab, morphology of sandvik sanergy after milling observed using SEM Hithaci SU3500 20 kV. Diameter of particles were observed by particle size analyzer (PSA). Results showed that crystal size as well as particle size tended to decrease with the increasing milling time. Discrepancy occurred at 24 hour of milling time and showed agglomeration.©2020 JNSMR UIN Walisongo. All rights reserved.

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