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Jurnal Sains dan Teknologi Reaksi
Published by Politeknik Negeri Lhokseumawe
ISSN : 1693248X     EISSN : 25491202     DOI : http://dx.doi.org/10.30811/jstr
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology
Jurnal Sains dan Teknologi Reaksi atau boleh disingkat dengan nama JSTR, berfokus pada banyak Aspek Teknik Kimia, seperti: Teknik Reaksi Kimia, Teknik Kimia Lingkungan, Energi Fosil dan Terbarukan, serta Sintesis dan Pengolahan Material.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 10 Documents
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Search results for , issue "Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI" : 10 Documents clear
CHOCOCHIP DRY CAKES AS A SNACK FOR DIABETES SUFFERERS Khairunniza, Dea; Syafruddin, S
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4813

Abstract

ABSTRACTChoco chips are chocolate in the form of small granules, usually chocolate chips are used as decoration on cakes, pastries and so on. Generally, chocolate chips are only used as a snack and contain high levels of sugar. This research discusses how to consume chocochip snacks which have low sugar content and are safe for diabetes sufferers. The independent variables used in this research are the types of sugar in the form of palm, regular and tropical as well as the types of wheat and oat flour. This research was carried out by making dry cakes first with various variations of sugar and flour. After that, tests are carried out in the form of water, protein, carbohydrate, free fatty acid content and organoleptic tests. From the research results, it was found that the lowest content test was a sample of wheat flour with a variation of tropical sugar of 4.1%, while the chocochip cake with the highest water content was a sample of oat flour with a variation of palm sugar with a water content of 6.36%. In the protein content test, the chocochip cake with the lowest protein content was a sample of oat flour with a variety of tropical sugar with a protein content of 101.06 mg/L, while the chocochip cake with the highest protein content was a sample of wheat flour with a variety of tropical sugar with a protein content of 204 .51 mg/L. In the carbohydrate content test, the chocochip cake with the lowest carbohydrate content was a sample of wheat flour with a variety of regular sugar with a carbohydrate content of 60.17 mg/L, while the chocochip cake with the highest carbohydrate content was a sample of oat flour with a variety of regular sugar with a carbohydrate content of 109.22 mg/L. In the free fatty acid content test, the chocochip cake with the lowest free fatty acid content was a sample of wheat flour with a variety of regular sugar with a free fatty acid content of 1.01%, while the chocochip cake with the highest free fatty acid content was a sample of oat flour with a variety of sugar. sugar palm with a free fatty acid content of 1.69%. In the organoleptic test for panelists, the choco chip cake with the highest average score was in the sample with variations of oat flour and palm sugar. Key words : antidiabetes, chocolate chips, cookies
CHARACTERIZATION OF BIODEGRADABLE POLYURETHANE POLYMER BASED ON BENTONITE-CHITOSAN HYBRID PALM SA, Sabiila Yasara; Syafruddin, S; Rihayat, Teuku
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4942

Abstract

Corrosion problems that often occur cause various damages and losses. The coating process has the advantage of being able to protect the metal surface from environmental influences that result in corrosion of the metal. The innovation of combining Polyurethane with Bentonite-Chitosan filler is able to make the polymer have better corrosion resistance. This study aims to see the effect of mixing between Polyurethane and Bentonite-Chitosan filler. The sample formulation used is polyurethane with variations of bentonite and chitosan 1%, 3%, 5%, 7%, 9%. The addition of Bentonite-chitosan filler affects the mechanical properties of the material. Characterization with the addition of Bentonite and Chitosan produces a polymer that has good thermal stability and good corrosion resistance. Test result Fourier Transform Infrared(FT-IR) there are functional groups NH, CH, C=O. Based on test resultsThermogravimetric Analysis(TGA) samplePolyurethane with modified bentonite 9%/chitosan 9% w/w has the best thermal stability among other samples where the sample starts to degrade (on set) at 419.22(oC) and stops degrading (end set ) at 521.94 (oC) with a weight loss of -31.156%. Polyurethane samples with 1% bentonite/chitosan 9% w/w modification had lower thermal stability where the sample started to degrade (onset) 312.21 (oC) and stopped degrading (end set) at 391.09 (oC) with a weight loss of -55.729 %. The results of the morphological test using the SEM tool show that the chitosan chains dispersed well into the bentonite interlayer. The corrosion test showed that the addition of bentonite and chitosan affected the corrosion rate, the greater the composition of bentonite and chitosan, the lower the corrosion rates. the best sample with a ratio of Polyurethane/Bentonite/Chitosan 9:9% w/w experienced the smallest corrosion rate of 5.08mpy and a mass loss of 0.1 gram.Keywords: Biodegradable, Corrosion, Polyurethane, Bentonite, Chitosan
THE EFFECT OF ADDING CHITOSAN ON THE MECHANICAL PROPERTIES OF ECO-FRIENDLY PLASTICS BASED ON PLA/PCL Alfatasya, Dinda; Suryani, S
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4814

Abstract

ABSTRACTResearch into making eco-friendly plastic has been developed because it is environmentally friendly and renewable. In this research, eco-friendly plastic was made from Polylactic Acid (PLA) and Polycaprolactone (PCL) with the addition of chitosan as a filler. The aim of this research is to study and determine the effect of mixing variations in PLA/PCL/chitosan composition on the mechanical properties of eco-friendly plastic using a hot press at a temperature of 200 0C for 1 hour. The PLA/PCL variations are 2/8 g, 3/7 g, 5/5 g, 7/3 g and 8/2 g while the chitosan composition is 0.2 g, 0.3 g, 0.4 g, 0, 5 g and 0.6 g. The characteristics of eco-friendly plastic can be seen through biodegradation tests, tensile strength tests, elongation tests, functional group tests and plastic film morphology tests. The results of the characterization of eco-friendly plastic with optimal performance are a composition of PLA/PCL/Chitosan 8/2/0.6 grams which produces 38.8% degradation percentage, a tensile strength value of 42.53 MPa with a composition of PLA/PCL/Chitosan 8 /2/0.4 grams, elongation percentage of 6.96% with a PLA/PCL/Chitosan composition of 8/2/0.2 grams. Meanwhile, the functional groups contained are the N – H, C – H, C = O and C – O groups. The results of the identification of functional groups show that no new functional groups are formed, but only a mixing process without any reaction in the constituent materials. Based on the results of the morphology test, it shows that the sample has a smooth surface. However, there is still chitosan that does not dissolve because the mixing process is not homogeneous.Keywords: Chitosan, Polycaprolactone (PCL), Polylactic Acid (PLA)
THE EFFECT OF EMULSIFIER SPAN 60 (Sorbitan Monostearate) ON THE HOMOGENEITY PROPERTIES OF LOTION GEL MADE Virgin Coconut Oil (VCO) AND ALOE VERA Nurhaliza, Siti; Yunus, M; Adriana, A
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4952

Abstract

ABSTRACT Making lotion from Virgin Coconut Oil (VCO) and Aloe Vera to which an emulsifier has been added requires antimicrobial ingredients, because the water phase facilitates the growth of microorganisms. The presence of methyl paraben preservative is very important in oil-in-water emulsions, because the shelf life of the product will last longer. This research aims to determine the effect of span 60 on homogeneity properties. The physical properties of the lotion include homogeneity test, pH test, viscosity test and specific gravity test based on SNI-16-3499-1996. The experimental process was carried out with varying weights of span 60 (sorbitan monostearate) 1 mg, 3 mg, 5 mg, 7 mg, methyl paraben with varying weights of 1.5 mg, 2 mg, 2.5 mg, 3 mg and a stirring time of 21 minutes. With the liquid phase and the heated oil phase.0.95- 1.05 g/ml. Keywords: Virgin Coconut Oil (VCO), Aloe Vera, Emulsifier, Span 60 (Sorbitan Monostearate), Methyl Paraben, Homogeneity.
DISTILLATION OF ESSENTIAL OILS FROM PATCHOULI LEAVES USING SOLAR ENERGY (PHOTOVOLTAIC) AS A HEATING SOURCE Prayogi, Muhammad Akbar; Rihayat, Teuku; Zaini, Halim
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4815

Abstract

Currently, the use of the sun as renewable energy is very effective. Solar Cells or commonly called Photovoltaic systems are components used to absorb heat from sunlight which is converted into electrical energy. This photovoltaic technology is very well implemented in Indonesia because of the tropical climate and long exposure to sunlight. Of the many types of essential oils, one of the most prominent in Indonesia is patchouli oil. Currently, essential oil refining still uses energy sources that can be scarce at any time and are less environmentally friendly. In this research, we tried to design a distillation device using solar cells to produce electricity which will later be used as a heating source. The highest yield obtained was 2.60% at a drying time of 32 hours and a distillation time of 420 minutes and the lowest yield obtained was 0.94% at a drying time of 0 hours and a distillation time of 300 minutes. From the results of analysis using GC-MS, it shows that the chemical compounds identified include 4,7-Methanoazulene, Seychellene, and several other compounds. Based on the GC-MS results, patchouli alcohol was 37.18% and 4,7-Methanoazulene was 2.78%. According to International Market Standards, the patcholi alcohol content must be higher than 30%, therefore this material meets the Indonesian National Standard (SNI).Keywords : Solar Cell, Patchouli Oil, Distillation Equipment, Indonesian National Standard
DEVELOPMENT OF CHITOSAN MODIFIED POLYURETHANE COMPOSITE AS A BASE MATERIAL FOR ANTIBACTERIAL COATING PAINT Wahyuni, Sri; Rihayat, Teuku; Syafruddin, S
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.5255

Abstract

ABSTRACTPolyurethanes are generally made from petroleum-based polyols, but the current state of petroleum is depleting. The availability of petroleum, which is currently decreasing, encourages other parties to look for new alternatives. One alternative that can be used is palm oil. Technological developments that continue to increase are now also a reference for the development of antibacterial polyurethane coating paints which are carried out by adding another filler, namely chitosan. This study aims to determine the effect of variations in the weight of chitosan as an antibacterial agent and to determine the effect of the ratio of polyol and TDI on the quality of the paint analyzed through functional group analysis with Fourier Transform Infra Red (FTIR), morphological analysis of Surface Scanning Electron Microscopy (SEM), Heat resistance test with Thermo Gravimetry Analyzer (TGA), and Bacterial activity test. The analysis process was carried out with variations in the weight of chitosan (0; 2; 3; 4; 5; 6) % w/w and variations in the ratio of polyol and TDI (50:50) %; (40:60)%; (45:55)%. The test results showed that the best polyurethane paint was the variation in the ratio of polyol and TDI 50:50% with 6%w/w chitosan filling. This is because the more chitosan added, the better it will be in inhibiting bacterial activity, and the more polyols, the better the paint quality. The test results showed that the best polyurethane paint was the variation in the ratio of polyol and TDI 50:50% with 6%w/w chitosan filling. This is because the more chitosan added, the better it will be in inhibiting bacterial activity, and the more polyols, the better the paint quality. The test results showed that the best polyurethane paint was the variation in the ratio of polyol and TDI 50:50% with 6%w/w chitosan filling. This is because the more chitosan added, the better it will be in inhibiting bacterial activity, and the more polyols, the better the paint quality.Keywords: Chitosan, Composites, Polyols, Polyurethanes, TDI
DISTILLATION OF ESSENTIAL OILS FROM THE LEAVES AND STEMS OF CITRONELLA (Cymbopogon Winterianus) USING A SOLAR ENERGY-BASED VAPOR DISTILLATION APPARATUS WITH PHOTOVOLTAIC METHOD Hafidh, Muhammad; Rihayat, Teuku; Elwina, E
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4816

Abstract

The photovoltaic method with solar panel modules with a capacity of 100 Wp can absorb heat and convert it into electrical energy up to 100 watts / hour and is used for the citronella oil refining process which requires 57,550 Kj of energy.  By using 4 solar cell panels, within 4 hours the power generated is able to meet these energy needs. Based on the test results of the design of the distillation device using solar cells, the efficiency of energy absorption cannot be absorbed up to 100%, due to the occurrence of lost energy but this can be overcome with a longer absorption time. In testing citronella oil with variations in drying time and distillation time, it was found that the optimum time to produce the highest percentage of citronella oil yield was at a drying time of 18 hours with a distillation time of 6 hours, namely 1.20%. From the laboratory tests produced, citronella oil with variations in drying time and operating time has a density value ranging from 0.8751gr/ml to 0.8831gr/ml and the best GC-MS test results obtained the amount of citronellol in the sample as much as 15.73% and the amount of geraniol as much as 28.57% has met the Indonesian National Standard (SNI) 2385-2006.Keywords: Solar Cell, Photovoltaic, Citronella Oil, Solar Panel
Manufacturing Silage From Field Grass For Cattle Feed Using The Fermentation Method Kiram, Jumadil; Zaini, Halim; Satriananda, S
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.5256

Abstract

ABSTRACT Ruminant livestock require forage for growth, reproduction and production. The principle of forage for livestock is that it contains good nutrition and is available throughout the year. One technology for preserving forage is by making silage. Making silage, apart from preserving and minimizing nutrient loss, can also improve feed nutrition. Silage is feed that is preserved through the ensiling process, namely the process of preserving feed or forage using fermentation work under anaerobic conditions (Suadnyana, et al, 2017). In this research, field grass silage was made with the addition of EM4 containing Lactobacillus sp bacteria at different concentrations and varied fermentation times so that making field grass silage is expected to improve the fermentative quality and improve or maintain the nutritional quality of the feed which can be seen from the content. water, protein content, pH, and color. The analysis process was carried out with varying fermentation times of 4, 8, 12, 16 and 20 days and EM4 concentrations of 0.2%, 0.4%, 0.6% and 0.8% (v/w). The test results show that the best silage is with a fermentation time variation of 20 days with an EM4 concentration of 0.6%, 20 days with an EM4 concentration of 0.2%, and 16 days with an EM4 concentration of 0.8%. This is because the longer the fermentation time and the more EM4 added, the better the quality of the silage obtained. Keywords: EM4, Bran, Fermentation, Molasses, Silage
DEVELOPMENT OF CHITOSAN-FILLED POLYURETHANE COMPOSITES AS ANTIBACTERIAL COATING PAINT Nurlaili, N
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4812

Abstract

Polyurethanes are generally made from petroleum-based polyols, but the current state of petroleum is depleting. The availability of petroleum, which is currently decreasing, encourages other parties to look for new alternatives. One alternative that can be used is palm oil. Technological developments that continue to increase are now also a reference for the development of antibacterial polyurethane coating paints which are carried out by adding another filler, namely chitosan. This study aims to determine the effect of variations in the weight of chitosan as an antibacterial agent through morphological analysis of Surface Scanning Electron Microscopy (SEM), heat resistance test with Thermo Gravimetry Analyzer (TGA), and Bacterial activity test. The analysis process was carried out with variations in the weight of chitosan (2; 3; 4) % w/w). The test results showed that the best polyurethane coating paint was with a variation of 4% w/w chitosan filling. This is because the more addition of chitosan, the better it will be in inhibiting bacterial activity.Keywords : Chitosan, Composites, Polyols, Polyurethanes, TDI
THE EFFECT OF TEA DWAGES AND EM4 IN MANUFACTURING FERTILIZER FOR THE GROWTH OF CAYYEY CHILLI Jefri, Muhammad; Rihayat, Teuku; Fachraniah, F
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4817

Abstract

Good quality organic fertilizer is useful for improving and maintaining soil fertility. In its application, this organic fertilizer is generally given through the soil but can also be given through the leaves. This research aims to determine the effect of tea dregs and the effect of the amount of EM4 on the growth of cayenne pepper, the results of stem height growth in cayenne pepper plants (Capsicum frutetences. L) by administration of EM4 and Tea Dregs with doses of 5;10;15;20;25 ml and Tea Dregs 50;100;150;200;250 and 250 grams have different characteristics, based on the statistical data it states the differences in dosages of the variables. 2, namely 10 ml/ 250 grams of tea dregs, dominates the growth of stem height in cayenne pepper plants.Keywords: Brown Sugar, Husk Charcoal,Cow Dung,The Dregs, EM4, Yellow Soil.

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