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Indonesian Journal of Chemical Science and Technology (IJCST)最新文献

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The Study of pH and Ionic Strength on Ni(II) and Pb(II) sorption using Humic Acid-Urea Formaldehyde (AHUF) pH和离子强度对腐植酸-脲醛吸附Ni(II)和Pb(II)的影响研究
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-03-01 DOI: 10.24114/ijcst.v5i1.33144
M. Sari, B. Rusdiarso
{"title":"The Study of pH and Ionic Strength on Ni(II) and Pb(II) sorption using Humic Acid-Urea Formaldehyde (AHUF)","authors":"M. Sari, B. Rusdiarso","doi":"10.24114/ijcst.v5i1.33144","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33144","url":null,"abstract":"The study of pH and ionic strength on Pb(II) and Ni(II) sorption with AHUF adsorbent has been investigated. The AHUF was synthesized from humic acid (AH) with urea-formaldehyde (UF) and characterization by FTIR, SEM-EDX, total acidity content, and pH zero point charge (pHpzc). The study of pH and ionic strength using the batch system. The formation of AHUF was identified based on; decreases in total acidity (349.30 cmol/kg), emerging peaks at 3351, 1258, and 1049 cm-1 by FTIR, and increases of N atoms 21.06% by EDX. The results indicate the adsorption of Pb(II) and Ni(II) are strongly dependent on pH and ionic strength at pH < 6. The AHUF have a pHpzc value is 4.82 with optimum sorption on pH 5. The variations of NaCl to adsorption Pb(II) and Ni(II) caused a decrease in the value of ionic activity from 0.999 M – 0.309 M, the amount of adsorbed will decreased.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85331910","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
Making Nitrogen Fertilizer using Cassava Leaves and Papaya Leaves on Chili Plants 利用木薯叶和木瓜叶在辣椒上制造氮肥
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-03-01 DOI: 10.24114/ijcst.v5i1.33138
Ella Oktaviana Siahaan, Kristin Wulan Liberti Vivanis Gulo, Ribka Darningsih, Sarah Sihotang
{"title":"Making Nitrogen Fertilizer using Cassava Leaves and Papaya Leaves on Chili Plants","authors":"Ella Oktaviana Siahaan, Kristin Wulan Liberti Vivanis Gulo, Ribka Darningsih, Sarah Sihotang","doi":"10.24114/ijcst.v5i1.33138","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33138","url":null,"abstract":"Nitrogen is one of the macro nutrients to increase plant growth and production. Yogurt is a processed product which is a fermented milk product that has long been known and has a specific sour taste. Yogurt contains streptococcus thermophilus and lactobacillus bulgaricus bacteria that live in symbiosis. Sweet potato leaves Its nutritional value can be increased through fermentation because fermentation can increase protein digestibility, reduce crude fiber content, improve the taste and aroma of feed ingredients and reduce heavy metal levels. Sweet potato leaves contain crude fiber of 25.71%, 69.50% moisture content. Nitrogen 13.41% .. This research was conducted for 3 weeks. 2 weeks in the fermentation process of nitrogen fertilizer solution and 1 week of giving it to plants. The results showed that the stem height, leaf color of the chilies changed after giving nitrogen fertilizer.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81617230","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
Process and Characterization of Natural Rubber Modification (Sir-20) With Grafting Maleat Anhydride 接枝马来酸酐改性天然橡胶(Sir-20)的工艺及表征
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-03-01 DOI: 10.24114/ijcst.v5i1.33141
Murdoni Sipayung, Eddyanto Eddyanto
{"title":"Process and Characterization of Natural Rubber Modification (Sir-20) With Grafting Maleat Anhydride","authors":"Murdoni Sipayung, Eddyanto Eddyanto","doi":"10.24114/ijcst.v5i1.33141","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33141","url":null,"abstract":"Modification of natural rubber by Grafting method using monomer maleate anhydride is a technique of  modification of natural rubber polymers that aims to change the physical and chemical sifak of natural rubber  polymers. The grafting process is carried out by comparing the amount of MA that is graphed based on the type of peroxide, the variation of peroxide concentration and the variation of MA concentration. FTIR test results showed the appearance of peak absorption at the wave number of 1710-cm cluster C=O carbonyl from MA that is graphed in natural rubber.. Based on the comparison of ir analysis of peroxide concentration used i.e. (0.01, 0.05 and 0.1) molar ratio obtained the largest carbonyl index at DCP concentration of 0.05 mr similarly, the  comparison of IR analysis results of MA concentration variations (3, 6, 9, 12) phr shows the largest carbonyl  index that appears in the C=O absorption area is in the KA-g-MA sample with a MA variation of 12 phr with  Carbonyl index = 45.81. The degree of MA grafting on natural rubber structures increases with increased MA concentration.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83089407","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
Analysis of Separation of Hydrogen and Oxygen Gases from Water through Water Electrolysis Experiments 水电解实验对水中氢气和氧气分离的分析
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-03-01 DOI: 10.24114/ijcst.v5i1.33137
Reinhard P Sihotang, Elsama Christina Manalu, Ryandi Simbolon
{"title":"Analysis of Separation of Hydrogen and Oxygen Gases from Water through Water Electrolysis Experiments","authors":"Reinhard P Sihotang, Elsama Christina Manalu, Ryandi Simbolon","doi":"10.24114/ijcst.v5i1.33137","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33137","url":null,"abstract":"Electrolysis of water is the decomposition of water compounds (H2O) into oxygen (O2) and hydrogen gas (H2) using an electric current that passes through the water. At the cathode, two water molecules react by capturing two electrons, reducing them to H2 gas and a hydroxide ion (OH-). Meanwhile at the anode, two other water molecules decompose into oxygen gas (O2), release 4H+ ions and flow electrons to the cathode. The H+ and OH- ions undergo neutralization so that some water molecules are formed again. The hydrogen and oxygen gases generated from this reaction form bubbles at the electrodes and can be collected. This principle is then utilized to produce hydrogen and hydrogen peroxide (H2O2) which can be used as fuel for hydrogen vehicles.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75139014","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
Preparation of Cryogenik Alcohol 低温酒精的制备
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-03-01 DOI: 10.24114/ijcst.v5i1.33136
Erika Yusnidar Samosir
{"title":"Preparation of Cryogenik Alcohol","authors":"Erika Yusnidar Samosir","doi":"10.24114/ijcst.v5i1.33136","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33136","url":null,"abstract":"Cryonics is an effort to preserve the human body in frozen conditions with the aim of reviving it at some time in the future. Cryogenic techniques have been developed to increase the solubility of a drug by creating amorphous drug particles with a nanoparticle structure and have high porosity under very low temperature conditions. So that a dry powder is formed which can be obtained from a drying process such as freeze drying. Cryogenic freezing is usually carried out using the help of a liquefied gas such as helium. In the medical field, cryogenic freezing is used to preserve vaccines so that they remain stable and can be stored for a long time. After freezing at low temperatures, these various items can be kept frozen by means of special refrigeration units, including mobile freezer units, thus making shipping possible.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77861256","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
Secondary Metabolite Phytochemical Screening Of Toba Frankincense Leaves (Styrax Paranelonerum Perk) 多巴乳香叶次生代谢物的植物化学筛选
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-03-01 DOI: 10.24114/ijcst.v5i1.33140
Ruth Natalia Manurung, Marham Sitorus
{"title":"Secondary Metabolite Phytochemical Screening Of Toba Frankincense Leaves (Styrax Paranelonerum Perk)","authors":"Ruth Natalia Manurung, Marham Sitorus","doi":"10.24114/ijcst.v5i1.33140","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33140","url":null,"abstract":"Toba frankincense plant (Styrax Paralleloneurum PERK) is a native Indonesian plant originating from the west coast of Sumatra, grows naturally and has been widely cultivated. This study aims to identify what secondary metabolites are contained in Toba incense leaves (Styrax Paralleloneurum PERK).","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81867394","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
Corrosion Factors on Nail 钉子上的腐蚀因素
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2022-03-01 DOI: 10.24114/ijcst.v5i1.33159
Titania Natasya, Muthia Embun Khairafah, Murna Sari Br Sembiring, Laura Nazrifah Hutabarat
{"title":"Corrosion Factors on Nail","authors":"Titania Natasya, Muthia Embun Khairafah, Murna Sari Br Sembiring, Laura Nazrifah Hutabarat","doi":"10.24114/ijcst.v5i1.33159","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33159","url":null,"abstract":"Corrosion is a chemical phenomenon in metal materials that can occur due to physical, chemical or biological processes. Physical processes are characterized by the destruction of metal morphology, chemical processes are characterized by chemical processes that occur in metals, and biological processes are characterized by the activity of destructive bacteria on metals. In this practicum, corrosion experiments were carried out on nails. The subjects in this study were 6 nails. This research was conducted by quantitative method, namely Experiment. The experimental method is a quantitative research method used to determine the effect of the independent variable (treatment) on the dependent variable (outcome) under controlled conditions. The result of his research is that the fastest and most visible corrosion is in plastic cups which are given hot water as a medium.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87787120","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
Analysis of Electrical Energy Contained in Vegetables 蔬菜中所含电能的分析
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2021-08-23 DOI: 10.24114/ijcst.v4i2.27602
Annisa Tri Banoeari, Tariza Humaira Tembusai, R. Siahaan
{"title":"Analysis of Electrical Energy Contained in Vegetables","authors":"Annisa Tri Banoeari, Tariza Humaira Tembusai, R. Siahaan","doi":"10.24114/ijcst.v4i2.27602","DOIUrl":"https://doi.org/10.24114/ijcst.v4i2.27602","url":null,"abstract":"This study aims to determine the source of electrical energy in potatoes and lime. The method used is based on the principle that the salt content in potatoes is a solution, where salt is the solute and water is the solvent, so the ions can move freely. The movement of the ions in the potato can conduct electricity. For the contained acid lime affects the hardness of the composite, which affects the matrix and filler bonds. oxalic acid, which is in lime juice, is a type of electrolyte solution. In a voltaic cell, the electrolyte solution can function to deliver ions from the anode to the cathode so that it can produce electrical energy. Electrical energy is energy that is very important in life. Electrical energy is a basic human need so that potatoes and lime can be used as an alternative source of electrical energy.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87704443","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
Identification of Explosion from Hydrogen Gas 氢气爆炸的识别
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2021-08-23 DOI: 10.24114/ijcst.v4i2.27599
Fithriyyah Karimah, Tico G Samosir, Fuaddinda P Salsabila
{"title":"Identification of Explosion from Hydrogen Gas","authors":"Fithriyyah Karimah, Tico G Samosir, Fuaddinda P Salsabila","doi":"10.24114/ijcst.v4i2.27599","DOIUrl":"https://doi.org/10.24114/ijcst.v4i2.27599","url":null,"abstract":"Hydrogen or sometimes called water, is a chemical element on the periodic table that has the symbol H and atomic number 1. At standard temperatures and pressures, hydrogen is colorless, odorless, non-metallic, singlevalent, and a highly flammable diatomic gas. With an atomic mass of 1.00794 amu, hydrogen is the lightest element in the world. It is also the most abundant element, accounting for roughly 75% of the total elemental mass of the universe. Most stars are formed by hydrogen in the plasma state. Hydrogen compounds are relatively rare and rarely found naturally on Earth, and are usually produced industrially from various hydrocarbons such as methane. Hydrogen can also be produced from water through electrolysis, but this process is more expensive commercially than producing hydrogen from natural gas. With the aim to prove the explosion that occurred and the reaction that occurred during the experimental process of an exothermic or endoderm reaction explosion","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89529894","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
Making Charcoal Water Electrodes 制作炭水电极
Indonesian Journal of Chemical Science and Technology (IJCST) Pub Date : 2021-08-23 DOI: 10.24114/ijcst.v4i2.27598
Amalia Amira Rashidah, Amar Lohot Tanjung, Sindi H Sembiring
{"title":"Making Charcoal Water Electrodes","authors":"Amalia Amira Rashidah, Amar Lohot Tanjung, Sindi H Sembiring","doi":"10.24114/ijcst.v4i2.27598","DOIUrl":"https://doi.org/10.24114/ijcst.v4i2.27598","url":null,"abstract":"Charcoal is the residual waste from the heat decomposition process of carbon-containing materials, most of whose components are carbon. This study aims to determine the frequency of charcoal water as an electrolyte solution to produce an alternative energy source that is environmentally friendly. The method used in the experiment is to find the type of water with the addition of zinc and copper and to measure the sample voltage of charcoal water to determine the optimum mass and optimum interaction time. The variation in the volume of water with 50 ml and 100 ml of charcoal water was produced, with the addition of zinc and copper in the size of 1x5 cm, 2x5 cm, 3x5 cm which resulted in fluctuations in each data. For example, the difference in voltage value in the type of water used is tap water, 100 ml well water with the addition of zinc and copper measuring 2x5 cm. Tap water, namely with an electric voltage of 0.65 V, 0.70 V, 0.60 V, 0.60 V, 0.75 V and well water with an electric voltage of 0.60 V, 0.55 V, 0.55 V, 0.55 V, 0.55 V. Less than the maximum frequency produced with two glasses that are not made into a series or parallel circuit.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78539443","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
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