Journal of Natural Sciences and Mathematics Research最新文献_第7页

Study on Diversity of Dragonfly (Odonata) as A Bioindicator of Water Quality in Mount Muria Area, Central Java 中爪哇穆里亚山地区蜻蜓多样性作为水质生物指标的研究

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-12-31 DOI: 10.21580/jnsmr.2019.5.2.11059

Saifullah Hidayat, Fiki Husnia, Ellatur Rohmah, Siti Mukhlishoh

{"title":"Study on Diversity of Dragonfly (Odonata) as A Bioindicator of Water Quality in Mount Muria Area, Central Java","authors":"Saifullah Hidayat, Fiki Husnia, Ellatur Rohmah, Siti Mukhlishoh","doi":"10.21580/jnsmr.2019.5.2.11059","DOIUrl":"https://doi.org/10.21580/jnsmr.2019.5.2.11059","url":null,"abstract":"Water in the Mount Muria area is needed by the surrounding community to fulfill life. An indicator is needed to determine water quality. Dragonfly (Odonata) is one of the organisms as ecosystem controllers and bioindicators. This study aims to determine the diversity of dragonflies, determine water quality and describe the role of dragonflies as a bioindicator of water quality in the Mount Muria area. This type of research is descriptive quantitative research. The data collection technique used direct observation at 3 stations, namely the Colo Flower River, the Monthel Waterfall River and the River in the Rejenu Area. The results showed that there were 10 species of dragonflies consisting of 6 suborders Anisoptera and 4 suborders Zygoptera with the highest abundance value being Euphaea variegata (51.39%), Enallagma signatum (28.47%), Trithemis festiva (6.94%), Orthetrum glaucum (5.56%), Orthetrum chrysis (2.78%), Orthetrum pruinosum (2.08%), Orthetrum testaceum (0.69%), Orthetrum sabina (0.69%), Prodasineura autumnalis (0.69% ), and Drepanosticta fontinalis (0.69%). Based on water quality analysis and according to government regulation no. 82 of 2001, the water in the muria river belongs to category 2. According to the analysis of the family biotic index, it can be seen that the FBI value of the river in the Muria area is 5.60 which means the condition of the river is fair with moderate pollution levels. ©2019 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"19 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":"126791798","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

Measurement of Moment of Inertia Through a Bifilar Pendulum Swing Based on a Microcontroller 基于单片机的双线摆转动惯量测量

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-12-31 DOI: 10.21580/jnsmr.2019.5.2.11028

N. Widayati, N. W. Lurinda, H. Hartono, Supriyadi Supriyadi

{"title":"Measurement of Moment of Inertia Through a Bifilar Pendulum Swing Based on a Microcontroller","authors":"N. Widayati, N. W. Lurinda, H. Hartono, Supriyadi Supriyadi","doi":"10.21580/jnsmr.2019.5.2.11028","DOIUrl":"https://doi.org/10.21580/jnsmr.2019.5.2.11028","url":null,"abstract":"Every object has a tendency to maintain its state of motion. The concept also applies to rotating objects called moments of inertia. This experiment aims to explain the working principle and determine the magnitude of the moment of inertia of objects using a bifilar pendulum teaching aid based on the ATMEGA-16 microcontroller. The implementation method used is the experimental method. The working principle of the ATMEGA-16 bifilar pendulum microcontroller-based teaching aids uses the bifilar pendulum principle. The moment of inertia of an object can be measured using a measuring tool that works at the moment of the inertia oscillation method. The bifilar pendulum experiment consists of an object which is tied on either side by a rope and then attached to a support. Objects are deviated horizontally with a small angle to the equilibrium position and then released, the object will experience periodic oscillations. Based on the experimental results the shorter the distance of the two bifilars, the period will be even greater, and vice versa. The magnitude of the period (T) on the bifilar pendulum is inversely proportional to the root distance between the two bifilar (d). The results of experiments carried out for variations in rope length and the distance between the ropes. The moment of inertia based on experiments for variations in length of rope at 0.35 m is (I ± ΔI) = kg/m2 ; 0.45 m is (I ± ΔI) = kg/m2 ; 0.55 m then (I ± ΔI) = kg/m2 ; 0.65 m then (I ± ΔI) = kg/m2 and 0.75 m, (I ± ΔI) = kg/m2.. Furthermore, the moment of inertia is based on experiments for variations in the distance between the ropes at 0.1 m then (I ± ∆I) = kg/m2; 0.15 m then (I ± ∆ I) = kg/m2; 0.20 m then (I ± ∆I) = kg/m2; and 0.25 m then (I ± ∆I) = kg/m2. The experimental results show that the smaller the distance between the two ropes will produce conformity to the theory of the solid cylinder using the shaft approach through the center.©2019 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"91 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":"124161890","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 The Properties and Quick of Wave Creation on A Simple Ripple Tank Using Frequency Sensors 基于频率传感器的简易纹波槽产生波的特性及速度分析

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-12-31 DOI: 10.21580/jnsmr.2019.5.2.11060

Anisa Furtakhul Janah, M. Sugita, H. Hartono, Supriyadi Supriyadi

{"title":"Analysis of The Properties and Quick of Wave Creation on A Simple Ripple Tank Using Frequency Sensors","authors":"Anisa Furtakhul Janah, M. Sugita, H. Hartono, Supriyadi Supriyadi","doi":"10.21580/jnsmr.2019.5.2.11060","DOIUrl":"https://doi.org/10.21580/jnsmr.2019.5.2.11060","url":null,"abstract":"Practicum is one of the effective methods for students in learning Natural Sciences (IPA), especially Physics subjects. The purpose of the practicum is to make it easier for students to understand concepts and help explain physics concepts that cannot be observed directly by the eye. The 2013 curriculum demands physics learning to integrate various concepts, so that students have a thorough understanding of a phenomenon. This study aims to determine the effect of spring strain and tube length on the speed of propagation and wavelength. Ripple tank experiments that currently exist, only calculate variations in fluid height, gap size, vibrator frequency, and so on. The method used in this research is experimental, for the components used consist of a set of simple ripple tank tools and frequency sensors. The analytical technique used in this research is descriptive quantitative. The highest and lowest frequencies produced from the small tube were 20 Hz (l=70 cm; = 0.04 cm) and 1 Hz (l=5 cm; = 4.30 cm). The highest and lowest frequencies obtained from the large tube were 52 Hz (l=70 cm; = 0.05 cm) and 3 Hz (l=5 cm; = 4.95 cm). The highest and lowest wave propagation velocities produced by the small tube are 4.3 cm/s (l=5 cm) and 0.89 cm/s (l=70 cm). The highest and lowest wave propagation velocities produced by the large tube are 9.87 cm/s (l=5 cm) and 2.69 (l=70 cm). Based on the results of the study, it was shown that the greater the spring strain, the higher the frequency, the wavelength and the speed of wave propagation.©2019 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":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126952060","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

Quality of Biocompost Resulting from Biopore Holes Based on Light Intensity and Acidity Degree (pH) 基于光照强度和酸度的生物孔堆肥质量研究

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-12-31 DOI: 10.21580/jnsmr.2019.5.2.11038

Arik Pujiyanti, S. Sulhadi, M. P. Aji

{"title":"Quality of Biocompost Resulting from Biopore Holes Based on Light Intensity and Acidity Degree (pH)","authors":"Arik Pujiyanti, S. Sulhadi, M. P. Aji","doi":"10.21580/jnsmr.2019.5.2.11038","DOIUrl":"https://doi.org/10.21580/jnsmr.2019.5.2.11038","url":null,"abstract":"The use of chemical fertilizers that are not balanced with the provision of organic fertilizers can damage the soil. Chemical fertilizers can also damage the balance of nutrients in the soil and lower soil pH. Therefore, organic fertilizers are needed to help restore soil fertility and LRB as a medium for composting organic fertilizers. The biopore infiltration hole (LRB) is \"activated\" by providing organic waste. This waste will be used as a source of energy for soil organisms to carry out their activities through the decomposition process. This decomposed waste is known as compost. Compost is a term for man-made organic fertilizer made from the decomposition process of the remains of living things (plants or animals). The investigation of this study was to determine the quality of compost based on light intensity and acidity (pH) from the results of biopore infiltration holes (LRB) as well as good physical properties of compost. This type of research is an experimental research. Good quality compost has low resistance. The pH value of the compost in samples A,B,D,E is 6.5-7.5 so it is neutral, while the pH of the compost sample C is 8.5 is alkaline. The intensity of the light is high. The results of the lowest light intensity in the compost from this study were leaf compost + sawdust + EM4 of 990 lux, fermented in LRB for 2 weeks. Meanwhile, the highest light intensity value was found in the compost of raw material leaves which were fermented for 1 month at 1017 lux. So the greater the value of light intensity in the compost, the better quality it has, because it can improve soil fertility. ©2019 JNSMR UIN Walisongo. All rights reserved.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"60 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":"116517276","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

Production of Brikueda (Briquettes from Teak Sawdusts and Durian Rind/Durio zibethinus) as Renewable Fuels 可再生燃料Brikueda(柚木木屑和榴莲皮/榴莲皮)的生产

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-06-30 DOI: 10.21580/jnsmr.2019.5.1.11025

Wihdatus Syarifah, S. Sulhadi, T. Darsono

{"title":"Production of Brikueda (Briquettes from Teak Sawdusts and Durian Rind/Durio zibethinus) as Renewable Fuels","authors":"Wihdatus Syarifah, S. Sulhadi, T. Darsono","doi":"10.21580/jnsmr.2019.5.1.11025","DOIUrl":"https://doi.org/10.21580/jnsmr.2019.5.1.11025","url":null,"abstract":"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.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114969727","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

Decrease of Free Fatty Acid Levels in Cooking Oil Using Sugar Cane 使用甘蔗可降低食用油中游离脂肪酸含量

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-06-30 DOI: 10.21580/jnsmr.2019.5.1.11027

Nasukwad Nasukwad, Alwi Ahmad Sulthon

引用次数: 0

Measurement of Friction Coefficient between Glass and Rubik's Beam on the Sloping Field using Rubik Lubricant 用魔方润滑剂测量倾斜场地玻璃与魔方光束的摩擦系数

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-06-30 DOI: 10.21580/jnsmr.2019.5.1.11023

Try Adi Sucipto

引用次数: 0

Production of Hand Washing Soap from Ethanol Extract of Fern (Pteridophyta), Nampong Leaves (Siegesbeckia orientalis) and Thistle Plants (Calotropis gigantea) 蕨类植物(蕨类植物)、南蓬叶(Siegesbeckia orientalis)和蓟植物(Calotropis gigantea)乙醇提取物生产洗手皂

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-06-30 DOI: 10.21580/jnsmr.2019.5.1.11022

Nuris Silvia, Shovi Amila

引用次数: 0

Effectiveness Analysis of the Utilization Liquid Smoke Distilled from Organic Materials as an Alternative for Fish Preservation 利用有机材料蒸馏液烟作为鱼类保鲜替代品的有效性分析

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-06-30 DOI: 10.21580/jnsmr.2019.5.1.11024

C. Dewi, S. Sulhadi, T. Darsono, E. D. Pratiwi

{"title":"Effectiveness Analysis of the Utilization Liquid Smoke Distilled from Organic Materials as an Alternative for Fish Preservation","authors":"C. Dewi, S. Sulhadi, T. Darsono, E. D. Pratiwi","doi":"10.21580/jnsmr.2019.5.1.11024","DOIUrl":"https://doi.org/10.21580/jnsmr.2019.5.1.11024","url":null,"abstract":"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.","PeriodicalId":191192,"journal":{"name":"Journal of Natural Sciences and Mathematics Research","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117232203","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 the Results of the Reduction of Cyanide Acid Content in Hevea brasiliensis Seeds 降低巴西橡胶树种子氰酸含量的结果分析

Journal of Natural Sciences and Mathematics Research Pub Date : 2019-06-30 DOI: 10.21580/jnsmr.2019.5.1.11026

Diah Ayu Kusuma Putri, S. Sulhadi, T. Darsono

引用次数: 1