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JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Published by Universitas Sari Mutiara Indonesia
ISSN : ""     EISSN : 26153378     DOI : https://doi.org/10.51544/kimia.v6i1
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Materials Science & Nanotechnology
Focus on results study and literature review in the scope of chemistry education and chemistry sciences in the world. Scope: Chemistry Education Analytical chemistry, including new techniques and instrumentation Biochemistry and medicinal chemistry Inorganic chemistry, including main group, transition metal, and f-block compounds, as well as coordination, organometallic, and solid-state chemistry Materials chemistry of hard and soft matter, from the nanoscale upwards Nuclear chemistry and radioactivity Organic chemistry, including synthesis, characterization, and properties of organic compounds, as well as a study of organic reactions and their mechanisms Physical chemistry and chemical physics Sustainable, green, and environmental chemistry Theoretical and computational chemistry
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 131 Documents
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EFEKTIFITAS BAKTERI UNTUK DEGRADASI SAMPAH PLASTIK YANG DIISOLASI DARI TEMPAT PEMBUANGAN AKHIR (TPA) AIR DINGIN PADANG Nessa Satya Wati; Armaini Armaini; Tedy Alfajri; Indriani Sahira
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.739 KB)

Abstract

The problem of waste in Indonesia, which has not been handled properly, is plastic waste, where the high total consumption of plastic causes the amount of plastic waste produced to continue to increase every year. This study aims to determine the bacteria that can degrade plastic isolated from the Padang Cold Water Final Disposal Site (TPA). The method used in this study is that the sample was taken from the Padang Air Cold TPA at several points and then diluted. The bacteria were isolated in a petri dish that already contained NA (nutrient agar) media with the streak method, then incubated for 48 hours, the bacteria that have been grown are purified to get more specific bacteria, after being purified, degradation tests are carried out by inserting sterilized and weighed plastic pieces into a petri dish containing bacteria and NA media, the plastic samples used are LDPE (Low-Density Polyethylene) and Biodegradable. In the study 2 types of bacteria were purified , the weight reduction results in LDPE plastic samples were 10.61% on bacteria 1 and Biodegradable by 10.3% on bacteria 1. The SEM (Scanning Electron Microscope) test showed that the surface of the test sample was wavy, and there were wrinkles. In this study, it can be concluded that the isolated bacteria 1 can degrade plastic.
ANALISIS AKTIVITAS ANTIOKSIDAN DAN SITOTOKSIK SENYAWA PELARGONIDIN SEBAGAI KANDIDAT OBAT MENGGUNAKAN METODE DFT (DENSITY FUNCTIONAL THEORY) Rifno Gusfri Ramadhan; Imelda Imelda; Resin Teja Kusuma; Dwi Syukur Phameswari
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

The antioxidant properties of pelargonidin compounds were studied using the DFT/B3LYP/6-31G method in the gas phase and aqueous solvent. Toxicity analysis was studied using the OSIRIS Property Explorer program. Antioxidant measurement parameters such as BDE, IP, PDE, PA, and ETE values of pelargonidin compounds indicate that the suitable reaction mechanism in the process of radical inhibition by pelargonidin compounds is the SET-PT mechanism because it produces the smallest total energy of IP + PDE. The presence of water in the pelargonidin compound increased the BDE, IP, PDE, PA, and ETE values. Cytotoxic analysis showed that pelargonidin compounds are not mutagenic, do not cause irritation, do not cause tumors, and do not cause interference with the reproductive system. Pelargonidin has a drug score of 0.43 which indicates that pelargonidin is a potential drug candidate.
COOKIES UNTUK MENCEGAH STUNTING Arfiyanti Arfiyanti
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.675 KB)

Abstract

Stunting is short stature, one of which is caused by the cumulative process of nutritional deficiency of 1000 HPK. It is necessary to provide food fortified with multi micro and macro nutrients and ligands for pregnant women. The purpose of the study was to obtain a cookie fortification formulation according to the needs of pregnant women. Research method : The research on cookie formulation consisted of making flour (tuna fish, snakehead fish, beef, chicken, banana, green beans, tempeh), followed by a composite flour formulation. Composite flour optimization method with D-optimal RSM mixture design using Design Expert 7.0 trial software (DX 7 trial). The composite flour formula was selected based on the nutritional content and taste. Substitution of rice flour with selected composite flour in the standard recipe. Results: The content of protein, energy, vitamin A, vitamin B12, calcium, phosphorus, Zn, Iodine, Folic acid in the four cookies met the nutritional adequacy rate (RDA) for pregnant women in the second trimester. The levels of vitamin C and Fe are smaller than the RDA. Cookies contain ligands, are round in shape, have aroma, taste, color, appearance similar to cookies in general and are in accordance with SNI01-2891-1992,BUTIR1.2. Cookies meet the microbiological requirements of BPOM and are preferred by pregnant women in the second trimester, based on organoleptic tests. Conclusion: The four cookies can be used as additional food for pregnant women to accompany the government supplementation program.
KARAKTERISASI DAN UJI TOKSISITAS AKUT EKSTRAK ETANOL DAUN SERAI (Cymbopogon citratus) DESA BANDAR KHALIPAH TERHADAP MENCIT JANTAN (Mus musculus) Pravil Mistryanto Tambunan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (475.644 KB) | DOI: 10.51544/kimia.v6i1.2968

Abstract

Research has been carried out to determine the LD50 value and observe the toxic effects of Ethanol Extract of Lemongrass Leaves (EEEL) on male mouse using 64 male mouse which were divided into 4 groups. The control group was given 0.5% CMC-Na suspension while the treatment group was given a single dose of EEEL suspension with doses of 1500, 3500, and 7000 mg/kg BW given on the first day. Observations of toxic symptoms, changes in body weight and number of deaths were carried out for a span of 7-14 days. After observation, the surviving mouses were sacrificed for macropathological and histopathological examination of the liver and kidneys. The determination of the LD50 value was calculated based on the Indonesian Pharmacopoeia Method Edition VI, while the statistical data was tested using Quadratic Nonlinear Regression (QNR) with the SPSS computer program. The simplicia characterization showed positive results on triterpenoid, tannin, flavonoid, and saponin tests, and anthraquinone glycosides and negative results on alkaloid and steroid tests. The results showed that there were toxic symptoms starting in the 3500 and 7000 mg/kg BW dose groups. The statistical results of Quadratic Nonlinear Regression (QNR) also showed no significant difference between each group. In addition, there were no color differences in all groups in the results of organ macropathology. However, liver damage was found on organ macropathological examination at doses of 1500, 3500, and 7000 mg/kg BW. Meanwhile, EEEL doses of 3500 and 7000 mg/kg caused glomerular hypertrophy and dilation of several renal tubules. The LD50 result is 4,965.92 mg/kg BW which indicates that EEEL was categorized as moderate toxic.
IDENTIFIKASI AMPHETAMINE, METHAMPETAMINE DALAM URINE SISWA SMA “X” METODE STRIP STICK Dyna Grace Romatua Aruan; Maniur Arianto Siahaan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.38 KB) | DOI: 10.51544/kimia.v6i1.2973

Abstract

Amphetamines called alpha-methyl-phenethylamine, beta-phenyl-isopropylamine, or benzedrine are a class of simulants used to treat hyperactivity disorder due to inattention in adults and children. Methamphetamine is a drug that belongs to the amphetamine class. It works the same way as amphetamine can increase alertness, concentration, and when taken at high doses can cause euphoria. In general, marijuana is used through cigarettes, including the hallucinogenic drug group and class 1 drugs. The harmful impact of drugs on adolescents and especially for students is that drug use can cause negative effects that will cause mental and behavioral disturbances in a person, resulting in disruption of the neuro-transmitter system in the brain. nerves in the brain. Amphetamine and methampetamine levels were lowest in stems, roots and seeds, while the highest levels were found in flowers, sap and leaves. The type of research carried out is a qualitative analysis with the method of examining samples using ICT (Imunochromatography Test) with amphetamine and methamphetamine strips/sticks. The population in this study were 15 students of class XI SMA "X". The research conducted, took all the urine of class XI students. The urine collection process was carried out at the "X" School and then examined directly at the Science Laboratory in March 2022. The results of the overall urine sample examination were negative for amphetamine and methampetamine.
PENGARUH KADAR SILIKA DARI FLY ASH BATU BARA SEBAGAI BAHAN PENGISI HIDROGEL BERBAHAN DASAR SELULOSA BAKTERI (HSB) Indra Surya; Vivi Purwandari; Ani Khodijah
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (449.599 KB) | DOI: 10.51544/kimia.v6i1.2975

Abstract

In one coal combustion process, about 80% of fly ash is produced and the rest is bottom ash, which is around 20%. The main components of coal fly ash originating from power plants are silica (SiO2), alumina (Al2O3), and iron oxide (Fe2O3), the rest are carbon, calcium, magnesium, and sulfur. Silica is one of the most dominant components of fly ash. Hydrogels obtained without fillers still have a Swelling capacity that is not maximized, it is necessary to process hydrogels with high absorption capabilities. One of the methods used to increase the absorption of hydrogels is to add silica as a voice filler. This study aims to determine the effect of 10, 20, 30, and 40% silica content from coal fly ash as a filler for bacterial cellulose-based hydrogels. Silica was obtained by extracting sodium silicate solution from fly ash followed by the manufacture of silica gel using 3N H2SO4. The resulting silica gel is added to the hydrogel manufacturing process. Hydrogel with silica as a filler which produces water absorption, FTIR, and SEM. The test results show that the silica content of 20% has the highest water absorption capacity of 1290%. With the concentration used, silica precipitation will produce a sharper silica peak in the FTIR results. SEM analysis with the addition of silica with bacterial cellulose produces pores on the HSB surface which can absorb air more quickly. The pores on the surface of the HSB affect the water absorption capacity (hydrophilicity) to increase. The addition of silica precipitated from fly ash waste as a filler in Bacterial Cellulose Hydrogel (HSB) was able to increase the Swelling capacity of HSB
PENERAPAN LKS BERBASIS CTL PADA PERUBAHAN MATERI UNTUK MENINGKATKAN MOTIVASI BELAJAR SISWA PAKET B DI MASA COVID – 19 PADA SPNF KOTA BANDA ACEH Aulia Prasetia; Sri Ismulyati; Rizki Damayanti
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.762 KB) | DOI: 10.51544/kimia.v6i1.2976

Abstract

A research has been carried out with the theme "Implementation of CTL-Based Worksheets on Material Changes to Increase Student Learning Motivation in Package B during the Covid-19 Period at SPNF Banda Aceh City". This study aims to determine the effectiveness of the application of Contextual Teaching and Learning (CTL)-based LKS on material changes used in SPNF SKB Banda Aceh and to determine student responses to the application of Contextual Teaching And Learning (CTL)-based LKS on material changes in SPNF SKB. Banda Aceh City. The benefits of this research are for students, the LKS Module can be used as a learning resource, so that it can increase interest in learning chemistry, and can relate the material to the surrounding environment; For teachers, the LKS Module can be used as teaching materials to assist teachers in creating interesting and interactive learning situations; For schools, this research is expected to contribute to improving the conditions of chemistry learning so that it can create a better quality of education in the future. In this research, the method of observation, test (pre-test and post-test) and questionnaire. The results of this study indicate a positive response as evidenced by the data generated.
PREPARASI FILM NANOKOMPOSIT POLIVINIL ALKOHOL (PVA)/NANOKARBON DARI CANGKANG BUAH SAWIT (NCCS) DENGAN METODE PENCAMPURAN LARUTAN Vivi Purwandari; Malemta Tarigan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (281.22 KB) | DOI: 10.51544/kimia.v6i1.2977

Abstract

Polyvinyl alcohol (PVA) has good compatibility when added as filler in the form of nanocarbon so that it can produce environmentally friendly nanocomposite products. Thus, the addition of nanocomposites to PVA-based films is expected to increase and improve the mechanical properties of the resulting PVA films. This study aims to utilize palm fruit shells as raw materials for nanocarbons and as fillers for nanocomposites, as well as to determine the mechanical properties and thermal strength of nanocarbon nanofibers in the PVA matrix. Composite films were made using the solution mixing method. The research was conducted by mixing PVA solution (3.5 g) with various concentrations of nanocarbon from palm fruit shells (NCCS) and 2 ml of glycerol and 1 g of PEG 400. Film characterization includes tensile test, scanning differential calorimetry (DSC), and conductivity test. Tensile test of PVA/NCCS nanocomposite resulted in tensile strength of 0.314 MPa and an elongation of 4.21925 %. The thermal test of PVA/NCCS nanocomposite with DSC yielded a melting point of around 146.06oC. Electrical conductivity of PVA/NCCS 107.1 (1.07 x 10-3) s/cm. PVA/NCCS nanocomposite based on conductivity scale including a semiconductor material.
PRODUKSI DAN KARAKTERISASI NANOSERAT SELULOSA ASETAT DENGAN METODE ELEKTROSPINING Mahyuni Harahap; Liver Iman Putra Zai
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.994 KB) | DOI: 10.51544/kimia.v6i1.2978

Abstract

In this research, cellulose acetate fiber was produced by electrospinning method. Cellulose acetate was dissolved with acetone solvent and then putin to a cooling system torestrain the rate of evaporation of cellulose acetate. The conductivity and evaporation rate of the cellulose acetate solution were tested, and the cellulose acetate fiber sproduced were tested using scanning electron microscopy (SEM). The conductivity of the cellulose acetate solutionwas 3.45 S/cm at 15oC and almost doubled at 22oC. The cooling system test was ableto maintain the temperature of the cellulose acetate solution at 15 oC for approximately 2 minutes. In addition, bead fibers are produced due to their low conductivity.
PERBEDAAN KARAKTERISTIK KERTAS SENI DARI DAUN GLODOKAN TIANG KERING (Polyalthia Longifolia) KERING DENGAN TEKNIK PENGHALUSAN SECARA MANUAL DAN MACHINAL Nidia Cahya Pratama Ningrum; Bambang Triatma
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (217.341 KB) | DOI: 10.51544/kimia.v6i1.2995

Abstract

Polyalthia longifolia is one of the plants that have roots that can with stand damage caused by vehicle vibrations that pass aroundit, so it is suitable to be used as a road shade plant. And can the dried leaves that fall can be used as raw materials for making handicraft products. This study will discuss the differences in the characteristics of an art paper with manual and machine smoothing techniques and see how the level of people's preference for art paper using experimental research methods and using the One Group Pretest-Postest research design. The dat a collection methodis observation and documentation, then the data results will be processed using percentage descriptive analysis. The results showed that the level of preference for the basic color of paper manually was 81.33% while manually 80%, cross-sectional contours of the paper were machined 76% while manually 78.66%, art paper texture was 69.33% while 74.66%, and the average tensile strength of paper manually is 57,552N, while manually is 25,506N and the average papere longation is 2,444% while the paper manually is 1,533%. When viewed from the characteristics, both paper shave their own advantages and disadvantages.

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