Garuda - Garba Rujukan Digital

All

Helium: Journal of Science and Applied Chemistry

he_jsac
Website

Published by Universitas Pakuan

ISSN : 27761711 EISSN : 27764508 DOI : http://dx.doi.org/10.33751/helium.v2i1.5407

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

Welcome to Helium: Journal of Science and Applied Chemistry. Helium: Journal of Science and Applied Chemistry is a journal that publishes scientific papers in the field of chemistry. This Journal, run by Chemistry Study Program, Universitas Pakuan, Bogor. The Journal provides opportunities for scholars to submit papers in chemistry, and also management policies related to all aspects of chemistry and its sub-disciplines. The manuscript will not only be concerned with physical, organic, inorganic, analytical, and biochemistry but also in general science, and its applications are welcome, and fields that will be published online. The internet connection will add to the richness of information and scientific knowledge derived mainly from research. This journal is published two times a year, well documented in the form of books, which include a variety of chemistry papers by writers of various backgrounds. In addition, we also have partners from local editors who graduated as professor from some universities who will review each article before publication. Each article or paper published in this Journal will definitely be useful to all visitors and readers. Articles submitted to this journal will be reviewed by reviewers before publication by blind review.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 52 Documents

1 2 3 4 5

Optimization of Adsorption of Eugenol-Silica Gel Composites to Metal Ions Cu (II) Using Box Behnken Method Fitra Rachmalia; Muhammad Fathurrahman; Sutanto Sutanto
Helium: Journal of Science and Applied Chemistry Vol 2, No 1 (2022): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Silica gel can be used as an absorbent so that it can also be used as a process for making eugenol-silica gel composites. This study aims to optimize the adsorption of the eugenol-silica gel composite to Cu (II) metal ions and to determine the maximum absorption capacity and adsorption constant of the Langmuir and Freundlich isotherm model. This research begins with determining the optimization of contact time 10-60 minutes, temperature 20-45 oC and the weight of the adsorbent is carried out in the range of 0.10-0.20 grams in a 50 mL solution and the experimental design of the box Behnken method will determine three variables through (Response Surface Methodology). Furthermore, the determination of Cu levels by preparing 100 ppm Cu mother liquor, making a standard series, and testing with Atomic Absorption Spectroscopy (AAS), and then determination of Langmuir and Freundlich adsorption isotherms. The results showed that the optimum conditions for the adsorption process using Response Surface Methodology (RSM) were at a contact time of 30 minutes, a temperature of 45 oC with an adsorbent weight of 0.10 grams in a 50 mL solution, in Langmuir and Freundlich isothermal adsorption. The adsorption process takes place in two directions (reversible) the values of Kf, b and n are 8331; -5.2224 and -0.4541. The adsorption process takes place in two directions (reversible) the values of Kf, b and n are 8331; -5.2224 and -0.4541. The adsorption process takes place in two directions (reversible) the values of Kf, b and n are 8331; -5.2224 and -0.4541.

COFFEE GROUND ACTIVATED CHARCOAL AND ITS POTENTIAL AS AN ADSORBENT OF Ca2+ AND Mg2+ IONS IN REDUCING WATER HARDNESS Achmad Khaerul Mustaqim; Sutanto Sutanto; Yulian Syahputri
Helium: Journal of Science and Applied Chemistry Vol 1, No 2 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Residents of Ciaruteun Udik Village experienced complaints about the well water they use, namely the presence of scale on cooking utensils, soap is difficult to foam, and indigestion due to consuming hard water. One way to reduce water hardness is by adsorption. Coffee grounds can be used as activated charcoal and function as an adsorbent for calcium and magnesium metal ions. The purpose of this study was to determine the optimum contact time, pH, and weight of coffee grounds in the maximum adsorption of hardness in water. This study begins with the preparation of samples in hard water and coffee grounds, namely by activation with HCl, then the FTIR test of coffee grounds before and after activation. Activated coffee grounds charcoal was tested for adsorption capacity against hardness in water with variations in contact time, pH, and weight of the adsorbent. The results showed that coffee grounds activated charcoal can be used as an adsorbent in reducing water hardness. The optimum pH and contact time of coffee grounds activated charcoal in adsorption of hardness in water was at a contact time of 75 minutes and pH 7 with a hardness level in water of 565.17 mg CaCO3/L decreasing to 56 mg CaCO3/L. The optimum weight of coffee grounds activated charcoal in adsorption of hardness in water was 10 grams with hardness levels in water from 565.17 mg CaCO3/L decreasing to 12 mg CaCO3/L.

Hg (II) and Cd (II) Heavy Metal Ions Detection Based On Fluorescence Using Zn (II) Metal Ion Complex with Pyrazoline Derivatives Ligand Yulian Syahputri; Sutanto Sutanto; Riza Shabrina Zamzani
Helium: Journal of Science and Applied Chemistry Vol 2, No 1 (2022): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Pyrazoline derivatives can be used as ligands because they have photophysical properties and can chelate metal ions which cause very strong absorption, emission and have a fluorescence properties. Therefore, in recent years, pyrazoline ligands and their derivatives have been widely used for chemosensors. This research aims to detect fluorescence-based heavy metal ions Hg2+ and Cd2+ using a metal ion complex compound Zn2+ with pyrazoline derivative ligand. The research was started by synthesizing pyrazoline-derived ligands, then synthesizing complex compounds. Complex compounds were characterized using Fourier Transform Infra Red (FTIR), UV-Vis Spectrophotometer, and Spectrofluorometer. Then, a fluorescence study was carried out to determine the type of fluorosensor for complex compounds with the addition of heavy metal ions Cd2+ and Hg2+. The last stage is UV-Vis spectroscopy study on the addition of heavy metal ions Hg2+ and Cd2+. Pyrazoline derivative ligand obtained as para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazole-5-yl)benzene is a yellow solid. The metal ion complex compound Zn2+ with pyrazolin derivative ligand is a brown colored compound, has a yield of 45 % and a melting point is 245 oC. The FTIR spectrum showed the presence of functional groups such as amine, C-H aromatic, C=N, C=C aromatic, C-N, Zn-N and Zn-Cl. Analysis with UV-Vis spectrophotometer showed that there was a shift in the maximum wavelength from the ligand to the Zn(II)-ligand complex, namely 240 nm to 246 nm and 363 nm with molar absorptivity values (log ) of 4.56 and 4.28, respectively. For fluorescence analysis, two absorbance peaks were obtained, namely at a wavelength of 370 nm with an intensity of 3644 a.u and 478 m at 8216 a.u. The results of fluorescence chemosensor studies on the addition of heavy metal ions Hg2+ and Cd2+ showed that the metal ion complex compound Zn2+ with pyrazoline-derived ligands can detect heavy metal ions Hg2+ and Cd2+ with a turn-on type.

Characterization of Physico-Chemical Levels of Î²-Carotene and Antioxidant Activity in Dried Carrot Dregs Powder Farida Nuraeni; Siti Warnasih; Vevi Hikmafitri Rizali
Helium: Journal of Science and Applied Chemistry Vol 1, No 1 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Carrots contain many nutrients needed by the human body, especially as a source of vitamin A. Carrot pulp is a byproduct of the carrot juice process. The utilization of carrot dregs in household waste as food is still low. To increase added value, carrot dregs can be used as an additional ingredient as flour. The process of making dry carrot dregs uses the oven method with variations in drying temperature and time spent drying. The drying temperatures applied in this study were 40â—¦C, 50â—¦C, 60â—¦C and 70â—¦C with time variations of 17, 22, 27, 32 hours. Physicochemical testing includes yield levels, protein content test using the Kjeldahl method, water content test, ash content test, Î²-carotene content test using HPLC, vitamin A test, DPPH method antioxidant activity test and organoleptic test. Organoleptic tests in this study include texture, color and smell. The best results were obtained from the assessment of the organoleptic test which had the highest average value, namely carrot dregs dried at a temperature of 50 32C for 32 hours with a value of 6.0, which means the product was rather favored by the panelists.Carrot dregs dried at 50â—¦C for 32 hours had a yield rate of 19.30%, a moisture content of 4.41%, an ash content of 4.91%, a protein content of 4.07%, the antioxidant test had% inhibition of 661.30 ppm classified as a weak antioxidant. In the dried carrot dregs powder it still contains Î²-carotene although the level is only 1.92 mg with a vitamin level of 3187.2 IU. This shows that carrot dregs still contain Î²-carotene and vitamins even though the levels are not high and can function as an antioxidant inhibitor.

IDENTIFICATION OF ANTIBACTERIAL COMPOUNDS FROM ENDOPHYTIC BACTERIAL EXTRACT OF GREEN GRASS CINCAU PLANT (PREMNA OBLONGIFOLIA MERR) Anna Muthia Soliha; Leny Heliawati; Siti Warnasih
Helium: Journal of Science and Applied Chemistry Vol 1, No 2 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Green grass jelly (Premna oblongifolia Merr) is a plant that belongs to the Verbenaceae family with the Premna genus. The genus Premna has about 200 species in the Verbenaceae family which are spread in tropical to subtropical areas such as Asia, Africa, and Australia. This plant has potential as antibacterial, antipyretic, anti-inflammatory, and antioxidant. This research was conducted to make an extract of endophytic bacteria obtained from green grass jelly plants by maceration method. The extract obtained was tested for its antibacterial activity by disc diffusion method. Extracts with the highest antibacterial activity were identified by FTIR and GCMS. The results showed that the methanol extract of endophytic bacteria of green grass jelly plants had broad spectrum antibacterial activity because it was able to inhibit the growth of Gram-positive bacteria (Bacillus subtilis) and Gram-negative bacteria (Pseudomonas aeruginosa). The results of FTIR and GCMS showed that the active compounds contained in the endophytic bacteria of green grass jelly plants were thought to be Nerolidol compounds or 3,7,11-trimethyl-1,6,10-dokatrien-3-ol which are secondary metabolites of the sesquiterpene alcohol group and play a role in as an antibacterial.

Antioxidant Activity Test from Vegetable Tomato (Solanum lycopersicum) and Cherry Tomato (Solanum lycopersicum var. Cerasiforme) in Hand and Body Cream Farida Nuraeni; Leny Heliawati; Melani Nurastuti
Helium: Journal of Science and Applied Chemistry Vol 2, No 1 (2022): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Dry, scaly, rough skin conditions accompanied by wrinkles and black spots characterize the skin that experiences premature aging. One of the causes of premature aging is free radicals. These free radicals can be overcome with natural or artificial antioxidants. Natural antioxidants are found in fruits and vegetables, one of which is tomatoes. Tomatoes in direct use are less effective, so they are made in the form of hand and body cream. Production of vegetable tomato and cherry tomato extracts fruit extraction and maceration using 96% ethanol, then concentrated with a rotary evaporator until the extract is thick. The extracts of vegetable tomatoes and cherry tomatoes were then tested for phytochemical, antioxidant activity, and identification of compounds with LC-MS, then applied to hand and body cream with a concentration of 1% and 3% with codes F0, F1, F2, F3, and F4. Hand and body cream of tomato extract are tested by measuring pH, viscosity, specific gravity, total microbial Contamination, homogeneity and testing for antioxidant activity using the DPPH method. Phytochemical test results showed that flavonoid compounds were present in both extracts. The antioxidant activity of vegetable tomato ethanol extract was obtained with an IC50 value of 947.81ppm, and an IC50 value of 473.51 ppm was obtained for cherry tomato extract. From the LC-MS analysis, the compounds contained in cherry tomatoes, namely esculeoside A and B as cytotoxic activity, dehydrotomat as an antibacterial, kaempferol-3-O-rutinoside as an antioxidant, and tomatidine as an antibiotic. Antioxidant activity of hand and body cream, hand and body cream F4 (964.05 ppm), hand and body cream F3 (1001.97 ppm), hand and body cream F2 (1033.73 ppm), hand body cream F1 (1036.61 ppm), and hand and body cream F0 (1486.14 ppm). Hand and body cream cherry tomato extract 3%, formula 4 (F4), has the highest antioxidant activity. It can be concluded that the addition of extract concentration affects the antioxidant activity value of hand and body cream. Body cream F2 (1033.73 ppm), hand body cream F1 (1036.61 ppm), and hand and body cream F0 (1486.14 ppm). Hand and body cream cherry tomato extract 3%, formula 4 (F4), has the highest antioxidant activity. It can be concluded that the addition of extract concentration affects the antioxidant activity value of hand and body cream. Body cream F2 (1033.73 ppm), hand body cream F1 (1036.61 ppm), and hand and body cream F0 (1486.14 ppm). Hand and body cream cherry tomato extract 3%, formula 4 (F4), has the highest antioxidant activity. It can be concluded that the addition of extract concentration affects the antioxidant activity value of hand and body cream.

Synthesis of Ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl) benzene by Aldol Condensation Method Yulian Syahputri; Sutanto Sutanto; Linda Jati Kusumawardani
Helium: Journal of Science and Applied Chemistry Vol 1, No 1 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Synthesis of pyrazoline derivative ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl)benzene has been successfully carried out by aldol condensation method using 2-acetyl pyridine and terephthalaldehyde in ethanol solution. The synthesis results are then reacted with excess phenyl hydrazine. The yield of ligand obtainedwas 63.10% of ayellow solid. The ligand was characterized using 1H-NMR spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, fourier transform infra-red (FTIR) spectroscopy and spectrofluorometer. The characterization with UV-Vis spectrophotometer results shows ligand has a large value of molar absorptivity (Îµ) at wavelength 236 nm and concentration 5x10-5 M.The results indicates that the ligand has a strong fluorescence intensity. It proved by peak emission at 467.5 nm (I = 4055 a.u).

FORTIFICATION OF PROTEIN HYDROLYZATE OF MUJAIR FISH (Tilapia mossambica) IN EYEK-ENYEK (Cassava crackers) Eka Herlina; Farida Nuraeni; Aldi Alhadid
Helium: Journal of Science and Applied Chemistry Vol 2, No 2 (2022): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/helium.v2i2.6185

This study aims to determine the best-enriched formula for tilapia fish using an analysis of chemical and organoleptic characteristics. The research was carried out at the Chemical Laboratory of Pakuan University, Bogor from March to May 2021. The method used was an experimental method with six additional treatments of tilapia protein hydrolyzate, namely 0%, 2.5%, 5%, 7.5%, 10% and 12.5% with 20 semi-trained panelists as replicates. The observed variables consisted of the hydrolyzed protein yield of African catfish, the panelists' preference for color, texture, and taste of geeks, and a proximate test on water content, ash content and insoluble ash in acids, proteins, fats, and carbohydrates. The level of liking was calculated by Friedman Test, after which followed by Bayes Test to find out the best formula with the addition of tilapia fish protein hydrolyzate. The results showed that the addition of tilapia protein hydrolyzate in the research was still considered favorable, but the preferred treatment was the addition of 5% tilapia protein hydrolyzate, from some characteristics such as: better appearance, better texture, taste and aroma 7 (preferred), moisture 6.1% content, ash content 1.9%, acid insoluble ash content 0.17%, protein content 6.2%, and carbohydrates content 84.9%.

REFINING AND ANALYSIS OF COOKING OIL (WASTE COOKING OIL) USING RICE WITH THE BATCH METHOD Nila Tanyela Berghuis; Ana Farida; Sayyidah Afifa; Mazaya Aurora; Brikita Eusebes; Salsa Putri
Helium: Journal of Science and Applied Chemistry Vol 2, No 2 (2022): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/helium.v2i2.6202

The regular use of waste cooking oil, which has a high level of free fatty acids and carbonyl and peroxide compounds, is the background of this study, which is harmful to one's health. Using it indefinitely will harm health, including cancer, heart disease, and possibly death. We, therefore, performed research on the purification and analysis of waste cooking oil using white rice and aking rice with the batch method to detect the free fatty acid levels before and after purification and to establish the effectiveness of white rice and aking rice. Determine the utilized cooking oil's quality following filtration using adsorbent. The findings demonstrated that white rice was more effective than aking rice at reducing fatty acid levels, as shown by the acquisition of FFA levels using white rice of 0.3141% in the merchant oil sample and 0.2410% in the home oil sample. In comparison, purification with the aking rice adsorbent is 0.3474% in the merchant oil sample and 0.1374% in the home oil sample.

ANTIFUNGAL AND WOUND HEALING ACTIVITIES OF CHITOSAN NANOPARTICLES FROM GREEN MUSSEL SHELL (Perna viridis) AND JERNANG (Daemonorops draco) ETHANOL EXTRACT DRESSING PATCH Novi Nuraeni; Arkhi Yuvie; Putu Pratama; Danisha Herianti; Valentina Kusumaningtyas; Jasmansyah Jasmansyah
Helium: Journal of Science and Applied Chemistry Vol 2, No 2 (2022): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/helium.v2i2.6343

The development of chitosan nanoparticles and jernang (Daemonorops draco) as wound medicine materials have received a lot of attention from researchers. In this research the two materials will be combined. The antifungal of the materials determined based on inhibition test of Candida albicans and Malassezia furfur. The wound healing activities determined based on the in vivo wound healing test on Wistar rat (Rattus novergicus). The materials applicated on wound dressing patch. Chitosan was sinthesized from green mussels shell waste (Perna viridis L). The result showed that the yield of chitosan was 64.67% and degree of deacetylation (DD) was 69.53%. Meanwhile, chitosan nanoparticles can be prepared based on ball mill process. The result showed that average of the particles size was 437.6 nm (nanoparticles size is 1-1000 nm). Jernang was obtained by maseration process using ethanol organic solvents technical. The yield was 22.41% and showed positively of alkaloid, saponin, flavonoid and triterpenoid test. F3 has highest activies on antifungal and wound healing test results.

Page 2 of 6 | Total Record : 52

1 2 3 4 5

Filter by Year

2021 2024

Filter By Issues

All Issue Vol 4, No 1 (2024): Helium: Journal of Science and Applied Chemistry Vol 3, No 2 (2023): Helium: Journal of Science and Applied Chemistry Vol 3, No 1 (2023): Helium: Journal of Science and Applied Chemistry Vol 2, No 2 (2022): Helium: Journal of Science and Applied Chemistry Vol 2, No 1 (2022): Helium: Journal of Science and Applied Chemistry Vol 1, No 2 (2021): Helium: Journal of Science and Applied Chemistry Vol 1, No 1 (2021): Helium: Journal of Science and Applied Chemistry

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Muhammad Fathurrahman

Contact Email
he_jsac@unpak.ac.id

Phone
+6285221147578

Journal Mail Official
he_jsac@unpak.ac.id

Editorial Address
Jl. Pakuan No 1. Ciheuleut, Kel. Tegallega, kec. Kota Bogor Tengah, Kota Bogor, Bogor, Provinsi Jawa Barat

Location
Kota bogor,

Jawa barat

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Muhammad Fathurrahman

Contact Email he_jsac@unpak.ac.id

Phone +6285221147578

Journal Mail Official he_jsac@unpak.ac.id

Editorial Address Jl. Pakuan No 1. Ciheuleut, Kel. Tegallega, kec. Kota Bogor Tengah, Kota Bogor, Bogor, Provinsi Jawa Barat

Location Kota bogor, Jawa barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Muhammad Fathurrahman

Contact Email
he_jsac@unpak.ac.id

Phone
+6285221147578

Journal Mail Official
he_jsac@unpak.ac.id

Editorial Address
Jl. Pakuan No 1. Ciheuleut, Kel. Tegallega, kec. Kota Bogor Tengah, Kota Bogor, Bogor, Provinsi Jawa Barat

Location
Kota bogor,

Jawa barat

INDONESIA