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INDONESIA
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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ANALISA MORFOLOGI CARBON DOTS (C-Dots) DARI AIR TEBU Khairul Amri; Marpongahtun Marpongahtun
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Carbon dots (C-dots) measuring less than 10 nm are currently the center of attention in nanocarbon materials. C-dots have unique physicochemical and photochemical properties that make C-dots a promising platform for imaging, environmental, catalytic, biological and energy-related applications. Sugarcane (Saccharum officinarum) is an annual plantation crop that is used as raw material for making sugar. The main content of sugarcane juice is sucrose (70-88%). The sugarcane juice content and low price make sugarcane juice suitable for use as a basic material for making carbon dots (C-dots). The process of making C-dots from sugarcane juice is done by adding urea as a passivation agent using the microwave method with a power of 110 watts. Sugarcane juice and urea (10:1) were dissolved with distilled water, stirred and heated at a temperature of 70 C for 15 minutes. The solution was then put in the microwave to dry (20 minutes). The gel formed was then dissolved with distilled water, centrifuged and then dialyzed for 24 hours. Morphological analysis of C-dots was performed by TEM analysis, showing that C-dots had an average diameter of 6.2 nm.
LIMBAH PLASTIK POLYETHYLENE TEREPHLATE SEBAGAI BAHAN CAMPURAN UNTUK PEMBUATAN BATU BATA RAMAH LINGKUNGAN Masdania Zurairah; Moyos Muhammad Yusuf
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Research has been done on plastic waste as a mixed material in the manufacture of bricks.The plastic waste used is Polyethylene Terephlate (PET) mineral water bottle plastic waste.A comparison is made between plastic and aggregate, with the ratio of plastic: aggregate, namely 50%: 50% is A1, 60%: 40% is A2, and 70%: 30% is A3.The more PET plastic waste, the smaller the volume shrinkage with the results A1 = 1268.65 grams, A2 = 1257.08 grams, A3 = 1246.17 grams where the initial weight is 1,500 grams.The water absorption capacity occurs that the greater the water absorption PET, the smaller the water absorption capacity so that the dry weight is obtained A1 = 1257.08 grams, A2 = 1246.17 grams and A3 = 1246.17 grams.
UJI KUALITATIF ANALISIS KANDUNGAN METAMFETAMIN DARI RAMBUT PENGGUNA SABU-SABU MENGGUNAKAN METODE KOLOM EKSTRAKSI Nur Asyiah Dalimunthe
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Methamphetamine is a stimulant, with a stronger stimulant effect than cocaine or other natural stimulants. Use in large quantities can cause "violence", hallucinations, and psychosis. Generally, methamphetamine is produced as powder-like crystals, large lumps of crystals, or in tablet form. Its use can be smoked through the nose, drunk, smoked like a cigarette, or injected. Shabu-shabu is a strong central nervous system stimulant drug that has an addictive effect when consumed and is a case of drug abuse mostly dominated by methamphetamine so accurate analysis is needed to detect these compounds. Research has been carried out on the initial study of methamphetamine analysis in the hair of shabu-shabu users using the sonication method and the extraction column. Sampling was carried out randomly from the hair of shabu-shabu users as many as 5 (five) hair samples. The prepared hair sample was then sonicated for 45 (forty five) minutes with various solvent system ratios, namely methanol:acetone:ammonia, ethylacetate:methanol:ammonia and chloroform:methanol:acetic acid. The sonicated filtrate was extracted liquid-liquid with methanol. The extract obtained was then analyzed qualitatively using Marquist's reagent which produces a very clear brownish orange color in the methanol:acetone:ammonia solvent system. The results of the sonication filtrate were continued with solid phase extraction using diatomaceous earth adsorbent and analyzed qualitatively with marquish reagent giving a brownish yellow color.
UJI AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL DAUN JELATANG (Urtica dioica L.) TERHADAP BAKTERI Escherichia coli Dia Moudy Villiya P.; Siti Maimunah
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Jelatang (Urtica dioica L.) is one of medicinal plants. Jelatang leave contain some compound as alkaloids, flavonoids and saponins. Those compounds are known to have antibacterial activity. This work was to study the antibacterial activity of extract ethanol jelatang leave (Urtica dioica L.) against Escherichia coli. The sample used jelatang leave (Urtica dioica L.) take from the environment Afd VI Kebun Tandun, Kampar, Kecamatan Tapung Hulu, Riau. The research used experimental method with stages as jelatang leave collection, identification of plant, manufacture of simplicia, extract making, skrining of phytochemicals, characterization of simplicia and antibacterial activity test.Powder of jelatang dried were extracted leaves by maceration method using ethanol 96%. Testing antibacterial activity by diffusion method using paper disc. The result of characterization of leaves jelatang powder of jelatang dried was found 9,19% water content, water soluble sari 24,94%, ethanol soluble sari 7,48%, total ash content of 18,46% and acid unsaturated ash content 6,49%. Antibacterial activity test showed that jelatang leave (Urtica dioica L.) ethanol extract could inhibited the growth of Eschericia coli has inhibitory power that is diameter as: extract 20% (5,4 mm) , 22% (6 mm), 24% (7,4 mm) 26% (7,8 mm). Ethanol extract jelatang leave have antibacterial activity the highest concentration 26% as 7,8 mm include medium category
IDENTIFIKASI FORMALIN PADA BEBERAPA JENIS IKAN ASIN DENGAN MENGGUNAKAN METODE FEHLING A DAN FEHLING B DI PUSAT PASAR KOTA MEDAN TAHUN 2021 M B Vista Laia; Dyna Grace Romatua Aruan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Dried fish is a result of the salting and drying process. Low water content in salted fish is due to absorption by salt and evaporation caused by heat from the sun. There are several types of food that are added with additives that are prohibited from being added to food so that the food is more durable and looks better. Food ingredients that use food additives that are not in accordance with the provisions have a direct influence on the degree of human health. Formalin is not a food additive and is prohibited from being added to food. The purpose of the study was to identify the presence or absence of formalin in several types of salted fish which are traded in the market center of Medan city using the Fehling A and Fehling B methods. The place of this research was carried out in the chemical laboratory, USM Indonesia Medan. In the results of research that has been carried out on 20 samples of salted fish, it shows that salted fish samples with codes F5 and F12 contain formalin. The sample codes F5 and F12 gave a red precipitate after being heated which previously added 1 mL of Fehling A and Fehling B and 18 other samples did not show a red precipitate. After observing all samples, there were 2 samples that were positive for formalin from 20 samples of salted fish studied which were declared ineligible in the Regulation of the Minister of Health of the Republic of Indonesia NO.722|MENKES|PER|IX|88 concerning food additives.
ANALISA KADAR BESI (Fe) DALAM AIR DI DEPOT AIR MINUM ISI ULANG YANG BERADA DI KELURAHAN DWIKORA KECAMATAN MEDAN HELVETIA KOTA MEDAN TAHUN 2021 Megawati Zendrato; Dyna Grace Romatuan Aruan
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Water is a very vital element for human life on this earth. In the human body about 50 -80% consists of water. The high demand for drinking water, especially in urban areas, has encouraged the emergence of bottled water product industries and the production of refilled drinking water depots. Re-drinking water is one type of drinking water that can be drunk directly without cooking it because it goes through certain processing processes such as drinking water that is safe for health, it must go through the physical, microbiological, chemical and radioactive requirements contained in it. mandatory and additional parameters. The purpose of this study was to determine whether the level of iron (Fe) in refill drinking water in Dwikora Village, Medan Helvetia District, Medan City was in accordance with what had been determined by the Minister of Health of the Republic of Indonesia. through Permenkes No. 492/Menkes/Per/IV/2010 concerning Drinking Water Quality Requirements. This research is descriptive and uses atomi c absorption spectrophotometer (AAS). Based on the results obtained from 10 samples of refill drinking water, it was shown that there were 2 samples (20%) of Fe content that did not meet the drinking water quality requirements obtained from depots E and F of 0.59 mg/l. and 0 respectively. 0.35 mg/l and 8 samples (80%) were obtained from the depot A = 0.22 mg/L, B = 0.10 mg/L, C = 0.28 mg/L, D = 0.19 mg/L L, G= 0.27 mg/L, H= 0.23 mg/L, I = 0.19 mg/L, J= 0.17 mg/L these levels stillmeet the drinking water quality requirements. The maximum limit for Fe levels in Drinking Water Quality Requirements As regulated in the Regulation of the Minister of Health No.492/Menkes/Per/IV/2010 is 0.3 mg/L.
PENETAPAN KADAR FLAVONOID EKSTRAK RAMBUT JAGUNG MENGGUNAKAN METODE SPEKTROFOTOMETRI UV-VIS Gimelliya Saragih; A Zukhruf Akbari; M Zaim Akbari; Irfan Syahputra
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

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Abstract

Indonesia is an agricultural country with extraordinary natural wealth. Indonesia is also the 6th country with the largest corn production in the world. In the city of Medan, there are many corn sellers who do not pay attention to waste from corn such as corn husks and hairs. Corn silk as one part of corn that is not used properly. Hair is just a waste that pollutes the environment. This study aims to analyze the content of corn silk so that it can be applied according to the content contained in corn silk. Corn silk was extracted using the ultrasonication method and 70% ethanol solvent for 1 hour and the thick extract was obtained using a rotary evaporator, then a phytochemical screening test was carried out to determine what secondary metabolites were contained in corn silk using UV-Vis spectrophotometry at a wavelength of 200 -400 nm The results of the phytochemical screening test showed that corn silk contained alkaloids and flavonoids. UV-VIis spectrophotometry using a standard solution of quercetin. The flavonoid content in the corn silk extract sample was 2.99%.
PENGARUH PROSES PENGUKUSAN PADA DAUN UBI JALAR VARIETAS UNGU (Ipomoea batatas L.) TERHADAP KADAR B-KAROTEN DENGAN METODE SPEKTROFOTOMETRI UV-Vis Desi Sri Rejeki; Agung Nur Cahyanta; Isna Azzah Arfiyani
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

B-carotene is a very potential source of vitamin A and has the highest vitamin A activity of all known carotenoids. B-carotene in purple sweet potato varieties fulfils the needs of vitamin A and works as an antioxidant in reducing the effects of free radicals. The research aimed to determine the levels of B-carotene in fresh, and steamed purple sweet potato varieties by spectrophotometry UV-Vis. The extraction used liquid maceration method with n-hexane, acetone, and ethanol as a solvent with ratio 2:1:1. The method used for qualitative analysis was TLC with eluents n-hexane: acetone: ethanol by comparison 1:1:2 by silica gel plate as stationary phase. The qualitative analysis results showed that the value of Rf in fresh purple sweet potato leaves were 0.81 and steamed purple sweet potato leaves were 0.83. The maximum B-carotene wavelength was 450.5nm. The quantitative analysis results stated linear regression equation y=-8+1.27x and the correlation coefficient of 0.997. B-carotene levels of fresh and steamed purple sweet potato leaves were respectively 6.4036 yg/gram and 6.3721 yg/gram. The levels obtained were analysed by Independent Sample T Test with a significance level of 95%. The Independent Sample T Test results showed that there was an effect on the process of boiling and steaming on B-carotene level in purple sweet potato leaves. In conclusion, the B-carotene level of sweet potato leaves in the steaming process was better than boiling process.
UJI KETAHANAN LUNTUR WARNA PADA KAIN DENGAN PEWARNA DARI EKSTRAK UBI UNGU Ery Fatarina Purwaningtyas; Ahmad Shobib; Noormi Handayani
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

One of the cheap and widely available sources of anthocyanins in Indonesia is purple sweet potatoes because purple sweet potatoes contain anthocyanins that are greater than sweet potatoes with other varieties. This research conducted anthocyanin extract from purple sweet potato using technical extract tables using solvent methanol. The coloring process is carried out from pre-mordant without mordant. The compound used is alum. In the process of dyeing the cloth in the anthocyanin extract, the soaking time was varied, namely 12, 18, 24 and 30 hours. Furthermore, it was tested for color fastness against washing, staining, wet rubbing and dry rubbing.From the results of the study, the average anthocyanin content of purple sweet potato was 174.085 mg/100 g of dry matter.The results of the application of dye from sweet potato extract showed thatthe immersion time, pre-mordanting treatment and without mordant had no effect on the results of the color fastness test against washing, staining and dry rubbing. The results of the color fastness test to washing at 40°C gave a value of 1-2 or "not good", the results of the fastness test to staining and dry rubbing gave a value of 4-5 or "good".Pre-mordanting and without mordant affect the color produced, namely for pre-mordanting purple fabrics and pink fabrics without mordant.
ANALISIS EKSPERIMENTAL CAMPURAN BAHAN BAKAR SOLAR DAN HASIL REAKSI ALKOHOLISIS BIODIESEL DARI PALM FATTY ACID DISTILLATE SEBAGAI BAHAN BAKAR MESIN DIESEL PADA TAMBAK UDANG Ahmad Jibril; Faizin Adi Nugroho
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

Currently, condition of the availability of energy sources derived from fossil fuels which is decreasing and increasing air pollution caused by emissions resulting from the combustion of fossil fuels, then it is time to diversify energy by developing new and renewable energy environmentally friendly by utilizing sources of raw materials derived from vegetable oils, one of them is biodiesel. Biodiesel is produced through an alcoholics’ reaction process between vegetable oil and methanol with the help of an acid or base catalyst. Furthermore, the biodiesel that has been produced is then mixed with diesel fuel in a certain ratio to be used as fuel in diesel engines. Based on the results of the experimental reaction of biodiesel alcoholics with a variable concentration of catalyst against the weight of feed palm fatty acid distillate, the optimum methyl ester result was obtained at 98.65% and the results of the analysis of the alcoholics reaction of biodiesel with the variable ratio of reagents between the weight of methanol to the weight of feed palm fatty acid distillate obtained the optimum methyl ester result at 98.33%.

Page 8 of 14 | Total Record : 131

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