Journal of Natural Sciences and Mathematics Research最新文献_第6页

Parasicity level of Telenomus sp. parasitoid against Spodoptera frugiperda J. E. Smith eggs in the laboratory 拟端尾蝇对褐夜蛾虫卵的实验室寄生水平

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-12-31 DOI: 10.21580/jnsmr.2020.6.2.11225

I. Putra, Codrat Dwi Nugroho Sulistyo Wati

引用次数: 1

Calculation of Tabarru Funds Using Makeham's Mortalita Law and Gompertz's Mortalita Law Using the Cost Of Insurance Method 用Makeham's Mortalita Law和Gompertz's Mortalita Law计算Tabarru基金的保险成本法

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-06-30 DOI: 10.21580/jnsmr.2020.6.1.11156

Tauki Rohman Muzaki, Emy Siswanah, Seftina Diyah Miasary

{"title":"Calculation of Tabarru Funds Using Makeham's Mortalita Law and Gompertz's Mortalita Law Using the Cost Of Insurance Method","authors":"Tauki Rohman Muzaki, Emy Siswanah, Seftina Diyah Miasary","doi":"10.21580/jnsmr.2020.6.1.11156","DOIUrl":"https://doi.org/10.21580/jnsmr.2020.6.1.11156","url":null,"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.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124205545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of Milling Time on Crystal size Sandvik Sanergy 磨矿时间对晶体粒度的影响

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-06-30 DOI: 10.21580/jnsmr.2020.6.1.11153

Q. Sabrina, A. Afandi, N. Majid

引用次数: 0

Test the effectiveness of Breadfruit (Artocarpus altilis) leaf extract on the growth of Staphylococcus aureus 试验面包果(Artocarpus altilis)叶提取物对金黄色葡萄球菌生长的影响

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-06-30 DOI: 10.21580/jnsmr.2020.6.1.11151

Fitrotin Azizah, Anindita Riesti Retno Arimurti, Dita Artanti, Yeti Eka Sispita Sari

{"title":"Test the effectiveness of Breadfruit (Artocarpus altilis) leaf extract on the growth of Staphylococcus aureus","authors":"Fitrotin Azizah, Anindita Riesti Retno Arimurti, Dita Artanti, Yeti Eka Sispita Sari","doi":"10.21580/jnsmr.2020.6.1.11151","DOIUrl":"https://doi.org/10.21580/jnsmr.2020.6.1.11151","url":null,"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. ","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122007908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anti-tumor and anti-cancer activity test from Nabeez Ajwa Dates (Phoenix dactilifera L.) water 红枣水的抗肿瘤和抗癌活性试验

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-06-30 DOI: 10.21580/jnsmr.2020.6.1.11154

Merdiana Dyah Safitri, A. Fibonacci, R. N. Latifah

{"title":"Anti-tumor and anti-cancer activity test from Nabeez Ajwa Dates (Phoenix dactilifera L.) water","authors":"Merdiana Dyah Safitri, A. Fibonacci, R. N. Latifah","doi":"10.21580/jnsmr.2020.6.1.11154","DOIUrl":"https://doi.org/10.21580/jnsmr.2020.6.1.11154","url":null,"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.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123019481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eugenol isolation of Clove (Syzygium aromaticum) flower 丁香（Syzygium aromaticum）花的丁香酚分离

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-06-30 DOI: 10.21580/jnsmr.2020.6.1.3335

H. Nurcahyo, Rizki Febriyanti, Purgiyanti Purgiyanti

{"title":"Eugenol isolation of Clove (Syzygium aromaticum) flower","authors":"H. Nurcahyo, Rizki Febriyanti, Purgiyanti Purgiyanti","doi":"10.21580/jnsmr.2020.6.1.3335","DOIUrl":"https://doi.org/10.21580/jnsmr.2020.6.1.3335","url":null,"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. ","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129136769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Test the characteristics of essential oils of fragrant Lemongrass stems and clove leaves as an electric mosquito repellent 测试芳香柠檬草茎和丁香叶精油作为电驱蚊剂的特性

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-06-30 DOI: 10.21580/jnsmr.2020.6.1.11155

Aisyah Suwaiya, Indah Lestari

{"title":"Test the characteristics of essential oils of fragrant Lemongrass stems and clove leaves as an electric mosquito repellent","authors":"Aisyah Suwaiya, Indah Lestari","doi":"10.21580/jnsmr.2020.6.1.11155","DOIUrl":"https://doi.org/10.21580/jnsmr.2020.6.1.11155","url":null,"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.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122548158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Axial CT-Scan image of COVID-19 patients based in gender using the Otsu Thresholding method 基于性别的COVID-19患者轴向ct扫描图像Otsu阈值分析

Journal of Natural Sciences and Mathematics Research Pub Date : 2020-06-30 DOI: 10.21580/jnsmr.2020.6.1.11152

Melany Puspa Damayanti, Heni Sumarti

{"title":"Analysis of Axial CT-Scan image of COVID-19 patients based in gender using the Otsu Thresholding method","authors":"Melany Puspa Damayanti, Heni Sumarti","doi":"10.21580/jnsmr.2020.6.1.11152","DOIUrl":"https://doi.org/10.21580/jnsmr.2020.6.1.11152","url":null,"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.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130306878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kentong Damping Sound Intensity Level Based on Kentongan Length Variations 基于Kentong长度变化的Kentong阻尼声强级

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-12-31 DOI: 10.21580/jnsmr.2019.5.2.11039

E. Ellianawati, Muhammad An’im Arravi, Fitria Wulandari, Rofita Istiqomah

引用次数: 0

Utilization of Waste Combustion Heat as an Alternative Renewable Electric Energy Source Based on Thermoelectric Generator 基于热电发电机的燃烧余热替代可再生电能利用研究

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-12-31 DOI: 10.21580/jnsmr.2019.5.2.11029

Yeni Rima Liana, S. Sulhadi, M. P. Aji

{"title":"Utilization of Waste Combustion Heat as an Alternative Renewable Electric Energy Source Based on Thermoelectric Generator","authors":"Yeni Rima Liana, S. Sulhadi, M. P. Aji","doi":"10.21580/jnsmr.2019.5.2.11029","DOIUrl":"https://doi.org/10.21580/jnsmr.2019.5.2.11029","url":null,"abstract":"Thermoelectric generator is one alternative energy source that is using a temperature difference system to produce electrical energy. This research study aims to utilize combustion heat waste using a thermoelectric generator as a source of renewable electricity. This research method uses the experimental method. The thermoelectric system was made using seven thermoelectric modules TEC1 - 12706 arranged in series by varying the combustion media in the form of Rice husk, Sengon sawdust (Albizia chinensis) and Teak sawdust (Tectona grandis). The test is done by measuring the output voltage, the temperature of the cold side and the hot side which are then analyzed to get the output power and generator efficiency. From the trial results it was found that the greater of the temperature difference, then the output voltage, output power and generator efficiency increase. Output voltage, output power and maximum efficiency of testing prototype thermoelectric generator that generated were 4.64 V, W 20.38 and 16.46 % with fuel Teak sawdust in the tenth minute when the temperature difference of 76.17 0C.©2019 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122404162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1