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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 7, No 1 (2021): June" : 7 Documents clear
The effect of drying temperature on the characteristics of biodegradable plastic from Cassava pulp and Chitosan Adina Widi Astuti; Agus Yulianto; Upik Nurbaiti
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.2021.7.2.8389

Abstract

Conventional plastics made from polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polystyrene, and poly (ethylene terephthalate) are difficult to decompose. Bioplastics can reduce the amount of toxic waste generated from biological materials other than petroleum.  The combination of cassava pulp and chitosan can be used as a candidate for the manufacture of biodegradable plastics. The optimal drying temperature can produce biodegradable plastics that have good quality. The method used to determine the effect is the mechanical properties test with ASTM D-638M standard and degradation test. The results of this study obtained 6 samples of biodegradable plastic with variations in temperature A=40˚C, B=50˚C, C=60˚C, D=70˚C, E=80˚C and F=90˚C. From the results of the mechanical properties test, the tensile strength values of each sample are A = 0,84 MPa, B = 1,78 MPa, C = 2,24 MPa, D = 1,58 MPa, E = 1,23 MPa and F =0,57 MPa. While the percent elongation value of each sample is A = 11,09%, B = 21,62%, C = 30,25%, D = 15,94%, E = 13% and F = 7,2%. The drying temperature in the process of making biodegradable plastics can affect its mechanical properties, namely the higher the drying temperature used, the lower the tensile strength value and the percent elongation, this is because high temperatures can damage the chemical structure and evaporated sorbitol which serves to increase flexibility. The higher the drying temperature also causes the biodegradable plastic to take longer to degrade. Sample A with the lowest temperature degraded the fastest for 28 days, while sample F with the highest temperature degraded the fastest for 46 days.©2021 JNSMR UIN Walisongo. All rights reserved.
Forecasting the recovery of COVID-19 patients in East Java using the Fuzzy time series Cheng method Tony Yulianto; Faisol Faisol; Fatimatus Zahroh; Sri Suryanti; Mohamad Tafrikan
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.2021.7.1.11289

Abstract

Coronavirus 2019  (COVID-19) has significantly impacted Indonesia. Social restrictions in Indonesia's major cities and rural areas have been put in place as the coronavirus spreads. The Indonesian government is more vigilant with the spread of COVID-19, namely by issuing a lockdown policy to PSBB (Large-Scale Social Restrictions). Almost all Indonesian people have complied with the guidelines set by the government, namely carrying out all activities in a WFH manner to minimize the chain of distribution of COVID-19 in Indonesia. The author of this work forecasts the recovery rate of Covid-19 patients in the East Java region using the Cheng Fuzzy Time Series approach. After checking the simulation with real in the field, it can be seen that using 51 data starting from February 4 2021 to March 26 2021 gives results MAPE = 0.4602%, which means the forecasting is very accurate.©2021 JNSMR UIN Walisongo. All rights reserved.
The effect of Sargassum binderi alginate extract addition on the nutritional content of full cream Mung Bean Milk and its consumer acceptance Rais Nur Latifah; Putri Rahmawati Az Zahro
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.2021.7.1.6752

Abstract

Milk is one of the important nutritional components that consumed by children and adults. Mung Bean (Vigna radiata L.) contains high nutrition and functional compounds, as well as high nutrients content that the body needs. Mung Bean milk is processed into full cream Mung Bean milk with alginate addition. Variations of alginate addition are 1%, 1.5%, 2%, 2.5% and 3% (w/v). Characterization of full cream mung Bean milk is analysis of the viscosity, density, nutritional, total fiber content, and organoleptic analysis. Alginate is a heteropolysaccharide that has two monomers. The color of alginate is brown. The result of research in density and viscosity of the alginate are 1.43 g/mL and 7.42x10-3 kg m-1 s-1. The best composition for addition alginate to full cream Mung Bean milk is 3% (w/v).  The result of the best full cream Mung Bean milk of carbohydrate, protein, fat, and total fiber content is 98 mg carbohydrates/mL milk; 0.97% in 5 mL milk; 0.32 mg fat/mL milk and 13.1 mg/mL milk. Organoleptic analysis of 3% (w/v) addition alginate in full cream Mung Bean milk is like category.©2021 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.
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. 
Synthesis of Hydrochar Cassava peels with hydrothermal carbonization method and applications as hard water softener Dzikria Sari Pratiwi; Wirda Udaibah; Kustomo Kustomo
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.2021.7.1.11283

Abstract

Groundwater before being used is very important to pay attention to the quality of the water. Water has good quality if it is in accordance with several parameters, including chemical, physical, and biological parameters. Mineral salt content is one of the chemical parameters that can be used to determine the quality of water. In this study, the synthesis of cassava peel hydrochar was successfully carried out using the hydrothermal carbonization (HTC) method. This material was developed to reduce waste of cassava peel biomass and overcome the problem of water hardness. HTC cassava peel was developed as an alternative hard water softener adsorbent. The results of FTIR characterization on hydro-activation (activating hydrochar) and hydro-non (non-activating hydrochar) contain functional groups of O-H stretch, C-H stretch, C≡C stretch and C=C stretch. Observation of surface morphology by SEM method on hydro-non in the form of large sheets, while the surface on hydro-activities in the form of small sheets. The adsorption capacity of hydro-active against Ca2+ ions and Mg2+ ions were 85.240 mg/g and 87.210 mg/g, respectively. Meanwhile, the hydro-non adsorption capacity of Ca2+ and Mg2+ ions were 84,736 mg/g and 85,713 mg/g. The kinetics of hydro-active adsorption on Mg2+ ion took place on order 3 (0.000003 min-1) while when adsorption of Ca2+ ion took place on order 0 (0.0324 min-1).©2021 JNSMR UIN Walisongo. All rights reserved.
Synthesis and characterization of SO42-/KCC-1 catalyst as an alternative candidate for simultaneous esterification and transesterification reactions Ginda Putri Farikhah; Wirda Udaibah; Mulyatun Mulyatun
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.2021.7.1.6797

Abstract

Sulfate-impregnated acid catalysts can be used to replace conventional homogeneous base catalysts which are very dangerous, corrosive and environmentally unfriendly. Sulfate impregnation on porous support material will increase the surface area of the catalyst. The use of KCC-1 as a supporting material can produce catalysts with excellent properties. The method used in this research is the hydrothermal method for the synthesis of KCC-1 and the direct impregnation method for the synthesis of SO42-/KCC-1. Characterization of the resulting material using X-ray diffraction (XRD), FTIR spectrometer, and low temperature emission scanning electron microscope (SEM). The characterization results showed that the synthesis of KCC-1 and SO42-/KCC-1 had been successfully carried out. This is evidenced by the formation of amorphous silica, the presence of peaks of silica and sulfate groups, and scanning electron microscope images showing nano-sized materials.©2021 JNSMR UIN Walisongo. All rights reserved. 

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