cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
HENNY SYAPITRI
Contact Email
ojs.usmindonesia19@gmail.com
Phone
+6281375137136
Journal Mail Official
ojs.usmindonesia19@gmail.com
Editorial Address
Jln. Kapten Muslim No.79 Medan
Location
Kota medan,
Sumatera utara
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
 7   8   9   10   11 
PERBANDINGAN PENENTUAN KADAR PROKSIMAT DALAM BATUBARA MENGGUNAKAN METODE GRAVIMETRI KONVENSIONAL DAN THERMOGRAVIMETRIC ANALYSIS Muhammad Robiansyah; Subur P. Pasaribu; Aman Sentosa Panggabean
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

Abstract

Research on the comparison of the determination of proximate levels in coal using conventional gravimetric methods and Thermogravimetric Analysis (TGA) through comparative tests has been carried out. This study aims to determine the comparison of the average analysis results using the t-test, the precision level of analysis results of each method using CV Horwitz, and the comparison of the precision level of the analysis results using the F test. Based on the results of the t-test showed a significant difference in the average analysis results between the two methods for all parameters. In the test using CV Horwitz for parameters of inherent moisture, volatile matter and fixed carbon using both methods and also ash content using the conventional gravimetric method was declared to meet the precision requirements, but for the ash content parameter using TGA instruments was stated otherwise. The F test for parameters of ash content and inherent moisture showed a significant difference in the precision level of the analysis results between the two methods, but for the parameters of volatile matter and fixed carbon was stated otherwise.
PENGARUH LAMA FERMENTASI DENGAN MENGGUNAKAN AERASI TERHADAP RENDEMEN MINYAK NILAM (PATCHOULI OIL) Putri Rizky; Rika Silvany
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

Abstract

Patchouli (Pogostemon cablin Benth) is a tropical plant that produces a type of essential oil of the same name (pattern oil) which plays an important role in the world of flavor and fragrance, especially for the perfume and aromatherapy industry. This study aims to determine the fermentation time on the quality of patchouli oil using Indigenous Rhizosphere molds. This experiment was carried out by fermenting dried patchouli using Indigenous Rhizosphere mold for 12, 15, 18 and 21 hours and then distilled. The results showed that the best duration of fermentation in producing patchouli oil was 18 hours of fermentation with a yield of 2.89% and the quality of patchouli oil met the SNI standards, namely Specific Gravity 0.9609, Refractive Index 1.5039, Acid Number 0,601.
MODIFIKASI STRUKTUR ZAT WARNA KUINOLIN UNTUK MENINGKATKAN KINERJA SEL SURYA MENGGUNAKAN METODE DFT Elvira Deswita; Imelda Imelda; Rifky Farhan; Oesamah Oesamah
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

Abstract

In this study, Quinoline-based D-H-A organic dye was used which consisted of 4 dyes with various donor chains of aniline (Q1), indoline (Q2), phenol (Q3) and coumarin (Q4). The calculation method used is the DFT/TD-DFT (Density Functional Theory/Time Dependent-DFT) method with a B3LYP / 6-31G basis set. The aim of this study was to determine the modification of the quinoline-based D-H-A dye with variations of the donor chains are efficient as a sensitizer on DSSC. Analysis based on the parameters of the bandgap, wavelength absorption, excitation energy, G-inject, G-reg, oscillator strength, dihedral angle, bond length, dipole moment, LHE and Voc. The result of the study show O2 with the name 6-(indolin-5-yl) quinoline-2-carboxylic acid is the best dye with a bandgap is 2,6204 eV, absorption wavelength is 566,80 nm, excitation energy is 2,1875 eV, G-inject is -3,114 eV, G-reg 0,1239 eV. Therefore, it can be concluded that the modification of quinoline dye to D-H-A type can improve the performance of DSSC.
POTENSI MINYAK ATSIRI DARI DAUN TUMBUHAN SAMBUANG (Etlingera elatior) SEBAGAI SENYAWA ANTIBAKTERI DAN ANTIOKSIDAN M. Fadly; Suryati Suryati; Farid Al-Huzaini; Nadila Arrahim
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

Abstract

Sambuang (Etlingera elatior) is a member of the Zingiberaceae family which is widely distributed in Indonesia. Traditionally, sambuang is used for cooking spices and to cure various diseases, namely diseases of the ears, stomach, skin wounds, and stomach pain due to poisoning. In this study, essential oils were isolated from sambuang leaves and antibacterial and antioxidant activities were also determined. Isolation of essential oil was carried out by steam distillation and the chemical content of the isolated essential oil was analyzed by Gas Chromatography-Mass Spectrometry (GC-MS). It is known to contain 98 chemical compounds, with the main ingredients being a-Pinene (19.39%), Gadoleyl Alcohol (7.37), Myristoleyl Alcohol (7.16%), Palmitoleyl Alcohol (5.87%), Sabinene (5 ,48%). The results of the antibacterial activity of essential oils using the disc diffusion method showed strong activity against Escherichia coli, Salmonella typhi (50% concentration) and Staphylococcus aureus (70% concentration) with inhibition zones of 13.6 mm, 12 mm, respectively. and 11 mm. The results of the antioxidant activity test using the DPPH method (1,1-diphenyl-2-picrylhydrazyl) showed that the essential oil of sambuang leaf essential oil was not effective as an antioxidant because it was very weak with an IC50 value of 6939.18 g/mL.
ANALISIS MUTU BIODIESEL DAN RANCANGAN PERBAIKAN DI PT X DENGAN PENETAPAN KADAR TRIGLISERIDA SEBAGAI STANDAR Masdania Zurairah; Ansari Ansari; Joko Suprianto
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

Abstract

Research has been carried out at PT X in managing palm oil into biodiesel products. To get biodiesel from palm oil, it undergoes processes such as purification, transesterification and then methyl ester or biodiesel is produced. The biodiesel produced is a reaction between triglycerides (vegetable oil) and the chemical compound methanol with a catalyst. The company sets the standard for biodiesel to have a maximum triglyceride content of 0.2%. The production data turned out to show triglyceride levels above 0.2% with a very large number of outspec products so this indicates a problematic production system. Loss of quality or Quality Loss Function, this is due to damage in the manufacturing process stage, which will suffer losses, in the form of material, time, energy. At this stage the methanol used per hour is 4783 kg/hour and the catalyst is 773 kg/hour. This data is obtained from the total use of vegetable oil materials in 1 hour which is 46 tons/hour.
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

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

Show Abstract | Download Original | Original Source | Check in Google Scholar

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

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.
PENGOLAHAN LIMBAH KULIT KAKAO DAN KEMIRI PADA PEMBUATAN BIOPELET SEBAGAI BAHAN BAKAR ALTERNATIF Purwandari, Vivi; Harahap, Mahyuni; Zai, Liver; Arya Mubarakh, Muhammad
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 6 No. 2 (2022): Jurnal Kimia Saintek dan Pendidikan
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v6i2.3492

Abstract

The amount of fuel reserves were getting depleted and has created problems with the occurrence of a fuel crisis, which has resulted in higher prices and the economy of the community has been down. Biomass is a renewable alternative fuel source but still has weaknesses, like high water content, low calorific value and low density and the combustion process requires high temperatures. To overcome this problem, biomass can be processed into biopellets with the aim of increasing its density and increasing the quality of combustion. The research was about the processing of cocoa and candlenut shell waste as an alternative fuel in the manufacture of biopellets using tapioca adhesive. The stages of this research include the preparation of raw materials for cocoa shells and candlenut shells ground to a size of 60 mesh and then added with various adhesives of 5%, 10% and 15%, then printed manually and dried in an oven with a temperature of 60oC for ±3 hours. Furthermore, the biopellets were characterized based on the provisions of SNI 8021:2014 which included density, moisture content, ash content, volatile matter, fixed carbon, calorific value with the most optimum values, respectively, 1.02 g/cm3, 3.14%, 6 ,25%, 64.56%, 26.05% and 4145.6 cal/g. Biopellets were also tested for effectiveness such as fracture strength and combustion rates with values of 0.14% and 0.11 g/min, respectively. Biopellet with the best quality was found in the type of biopellet with a mixture of raw materials 2:1 and using 10% tapioca adhesive.
MAKANAN TAMBAHAN IBU HAMIL UNTUK MENCEGAH STUNTING DALAM UPAYA MENINGKATKAN KUALITAS SDM BAGI PERTAHANAN NEGARA Arfiyanti; Ariyanti, Dita
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 6 No. 2 (2022): Jurnal Kimia Saintek dan Pendidikan
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v6i2.3494

Abstract

Anak dengan stunting memiliki kemampuan verbal dan IQ rendah, disabilitas kognitif, penurunan kemampuan motorik dan gangguan fungsi imunitas. Perlu pemberian makanan tambahan (PMT) sebagai pendamping program suplementasi pemerintah pada ibu hamil untuk meningkatkan status gizi ibu hamil dan mencegah stunting dalam upaya meningkatkan kualitas SDM bagi pertahanan negara.  Mendapatkan formulasi fortifikasi cookies yang sesuai kebutuhan ibu hamil untuk mencegah stunting. Formulasi cookies berawal dari  pembuatan tepung (tempe, kacang hijau, ikan tuna, pisang), dilanjutkan dengan formulasi tepung  komposit. Rancangan metode optimasi tepung komposit RSM mixture design D-optimal, menggunakan software Design Expert 7.0 trial (DX 7 trial). Kandungan zat gizi bahan pangan yang digunakan lalu dibandingkan dengan jumlah zat gizi yang ingin ditambahkan. Formula tepung komposit dipilih berdasarkan kandungan gizi dan rasa. Substitusi tepung beras dengan tepung komposit terpilih pada resep  standar. Cookies berbentuk bulat, aroma, rasa, warna, kenampakan sesuai SNI01-2891-1992, BUTIR1.2. Kandungan protein, energi, vitamin A, B12, calsium, pospor, iodium, asam folat memenuhi AKG ibu hamil trimester II dan persyaratan BPOM. 70% ibu hamil trimester II menyukai cookies. Cookies ikan tuna dapat digunakan sebagai PMT ibu hamil pendamping program suplementasi pemerintah untuk mencegah stunting 180 HPK.

Page 9 of 14 | Total Record : 131

 7   8   9   10   11 

Filter by Year

2017 2025


Reset
Filter By Issues
All Issue Vol. 9 No. 1 (2025): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 8 No. 2 (2024): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 8 No. 1 (2024): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 7 No. 2 (2023): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 7 No. 1 (2023): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 6 No. 2 (2022): Jurnal Kimia Saintek dan Pendidikan Vol. 6 No. 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 6 No 1 (2022): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 2 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 5 No 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 5 No. 1 (2021): JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol 4 No 2 (2020): Volume 4 Nomor 2 Tahun 2020 Vol 4 No 1 (2020): Volume 4 Nomor 1 Tahun 2020 Vol 3 No 2 (2019): Volume 3 Nomor 2 Tahun 2019 Vol 3 No 1 (2019): Volume 3 Nomor 1 Tahun 2019 Vol 2 No 2 (2018): Volume 2 Nomor 2 Tahun 2018 Vol 2 No 1 (2018): Volume 2 Nomor 1 Tahun 2018 Vol 1 No 1 (2017): Volume 1 Nomor 1 Tahun 2017 More Issue