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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 222 Documents
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Design and build a mechanical energy conservation law KIT with Arduino microcontroller Adina Widi Astuti; Zayyinul Mushthofa; Sulhadi Sulhadi
Journal of Natural Sciences and Mathematics Research Vol 7, No 2 (2021): December
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.2021.7.2.8639

Abstract

Tools as media play an important role in learning physics to explain concepts, so that students can more easily build mastery of physics material and develop their skills. This study aims to design and realize a physics learning tool. The method used is research and development (Research and Development). This learning tool is in the form of a plane where the direction of the object's trajectory varies can move up, down, and is accompanied by a slope setting (30˚, 45˚, 60˚ or 90˚). Equipped with a speed output setting program based on 3 points whose speed will be measured and the distance between the points can be changed. Its function is to understand and prove the law of conservation of mechanical energy, understand the relationship between potential energy and kinetic energy experienced by objects and determine the speed of objects and their height position. This learning tool is expected to attract students' interest in learning physics. The design of this KIT Law of Conservation of Mechanical Energy can prove the conservation of mechanical energy. When an object is moving downwards, the object's height decreases but its velocity increases. On the other hand, if the object is moving upwards, the height of the object will increase, but the velocity of the object will decrease. This tool still has a relative error rate of 23.92% in free fall motion, 31.87% in falling motion on an inclined plane, and 32.79% in vertical upward motion.©2021 JNSMR UIN Walisongo. All rights reserved.
Parasicity level of Telenomus sp. parasitoid against Spodoptera frugiperda J. E. Smith eggs in the laboratory Ichsan Luqmana Indra Putra; Codrat Dwi Nugroho Sulistyo Wati
Journal of Natural Sciences and Mathematics Research Vol 6, No 2 (2020): December
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.2020.6.2.11225

Abstract

Telenomus sp. as a biological agent, can be used to control a new pest, namely Spodoptera frugiperda which attacks maize in Indonesia. The purpose of this study was to count the number of eggs of S. frugiperda parasitized by Telenomus sp. and to calculate the level of parasitization of the parasitoid Telenomus sp. against S. frugiperda in the laboratory. Research method that used in this research were searching for S. frugiperda caterpillars and preparation of Telenomus sp. The data analysis used in this research was inferential analysis. The results of this study were tested using the normality test, as well as the homogeneity test, and continued with the Kruskal Wallis test. The results showed that parasite level of parasitoid in tube I, tube II, tube III, and tube IV, namely 0%, 23.5%, 18.3%, 11.3%, and the calculation of sex ratio on Telenomus sp. were 2 females and 1 male were found. This study concludes that the number of parasitoids Telenomus sp. affects the level of egg parasitization.©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.
The effect of Rabbit urine and Bokashi addition on the stem growth of Shallots (Allium ascalonicum L.) Esna Dilli Novianto; Muh. Alwi Husen; Sugiyarto Sugiyarto
Journal of Natural Sciences and Mathematics Research Vol 7, No 1 (2021): 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.2021.7.1.11205

Abstract

Bokashi is a fermented rice straw. It is widely used as an organic fertilizer in Indonesia. It maintains the porosity of the soil, so the plant can grow perfectly. Rabbit urine on the other hand can be used as another nitrogen source. However, there is no report about the effect of both combination in shallots production (Allium ascalonicum L.), one of the main commodities in Magelang. For a better understanding on bokashi and rabbit urine, this experiment aims to study about its addition on the stem growth of shallots. Four dosages of rice straw bokashi were used. There are B0 (0kg/plot), B1 (3 kg/plot), B2 (4 kg/plot), and B3 (5kg/plot).  While the concentration of rabbit urine are P0 (0 mL/L), P1 (175 mL/L), and P2 (250 mL/L). The growth of the stem is measured every one week until it reached the full growth. This study showed that the addition of bokashi hinder the stem’s growth. It turned out that too many bokashi will raise the temperature of the soil and inhibit the plant’s growth.©2021 JNSMR UIN Walisongo. All rights reserved.
Boundedness of Pseudo-Differential Operator for S0 Class Muhammad Habiburrohman; Dinni Rahma Oktaviani
Journal of Natural Sciences and Mathematics Research Vol 6, No 2 (2020): December
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.2020.6.2.11219

Abstract

Pseudo-differential operator in a function space is obtained from the Fourier transform of this function space with a multiplier function. This paper will discuss and prove the boundedness of pseudo-differential operator in Lebesgue space with the multiplier function is in the class S0. The evolution of the pseudo-differential theory was then rapid. Based on development from this history, it has gave birth to the general definition of pseudo-differential operator that explain in this paper The general definition of pseudo-differential, of course has an applied or representation. One of them is the problem of partial differential equations in the Poisson equation  have the solution , and using Fourier transforms is obtained. In this case the form can be carried in the general form of a pseudo-differential operator. The  solution can be estimated for every if operator  is a bounded operator. In this paper, the operator defined with correspondes some symbol that describe this operator is more interest. The conclusion of this paper is the boundedness pseudo-differential operator , so we can estimated this number.©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. 
Analysis of chest X-Ray (CXR) images in COVID-19 patients based on age using the Otsu thresholding segmentation method Uhty Maesyaroh; Laelatul Munawaroh; Heni Sumarti; Rico Adrial
Journal of Natural Sciences and Mathematics Research Vol 7, No 2 (2021): December
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.2021.7.2.10891

Abstract

The infection with the COVID-19 virus or better known as the Corona virus spread throughout China and other countries around the world until it was designated a pandemic by the World Health Organization (WHO). Detection of patients infected with COVID-19 in the form of RT-PCR, CT-Scan images and Chest X-Ray (CXR). This study aims to analyze CXR images of COVID-19 patients based on age using Otsu Thresholding Segmentation. The image segmentation process uses the Otsu auto-tresholding method to separate objects from the background on the CXR image. The results show that the images of COVID-19 patients have pneumonia spots that are not visible on the original CXR image. The average value of the accuracy of the Otsu Thresholding results is 95.18%. Penunomia spots are mostly found in COVID-19 patients aged 50 to 70 years and over which cause severe lung damage.©2021 JNSMR UIN Walisongo. All rights reserved.
Classification of Pneumonia in Thoracic X-Ray images based on texture characteristics using the MLP (Multi-Layer Perceptron) method Latifatul Istianah; Heni Sumarti
Journal of Natural Sciences and Mathematics Research Vol 6, No 2 (2020): December
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.2020.6.2.11228

Abstract

One of the diseases that attack the lungs is pneumonia. This disease can attack someone with a weak immune system. Pneumonia is inflammation of the lungs that can be caused by pathogens, such as bacteria, viruses, and fungi. The purpose of this study was to classify fungal pneumonia, bacterial pneumonia, and lipoid pneumonia based on texture characteristics and the MLP method using machine learning WEKA. The method in this study has three stages including pre-processing, extraction of texture features consisting of Histogram and GLCM, and classification using the MLP (Multi Layer Perceptron) method. The results of the texture feature extraction showed that the three types of pneumonia were: lipoid pneumonia with brightness, sharp contrast random distribution on correlation characteristics, bacterial pneumonia with high brightness, high contrast random distribution on energy characteristics, and fungal pneumonia with brightness, sharp contrast, random distribution of homogeneity attributes. The third similarity of pneumonia is in the gray level that collects each other in the middle. The method used in this study resulted in the same accuracy, sensitivity, and specificity, namely 100%. The image classification in this study shows the success of the texture features and the MLP method in classifying pneumonia images accurately so that they can be used as additional tools that make it easier for medical experts.   ©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. 
Diversity of soil Arthropods in Red Chili (Capsicum annuum L.) farm in Sindumartani Village, Ngemplak, Sleman, Yogyakarta Ichsan Luqmana Indra Putra; Andika Setyo Budi
Journal of Natural Sciences and Mathematics Research Vol 7, No 1 (2021): 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.2021.7.1.11282

Abstract

The purpose of this study was to identify soil arthropods and calculate the index of diversity, richness, evenness, dominance and importance index in chili farming land, Sindumartani Village, Ngemplak, Sleman, DIY. The research was conducted by monitoring the research location, sampling and data analysis. The method used is to use a pitfall trap. Data collection was carried out at 3 locations by placing sampling plots at 4 pitfall traps 40 m longEach research location was named station 1, station 2 and station 3. Then the data were analyzed using the formula for diversity index, wealth, evenness, dominance and important value index. The results showed that the soil arthropods found were 8 orders, 11 families and 15 species. The calculation results obtained from the diversity index value (H`) at station 1 is 1.10986, at station 2 is 1.09405 and at station 3 is 1.17118. The value of the species richness index is obtained from data at station 1 which is 1.40877, at station 2 is 1.99049 and at station 3 is 1.79858. The value of the species evenness index obtained by data at station 1 is 0.48201, at station 2 is 0.45208 and at station 3 is 0.50864. The dominance index value obtained by data at station 1 is 0.51820, station 2 is 0.56397 and at station 3 is 0.50471.©2021 JNSMR UIN Walisongo. All rights reserved. 

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