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Unesa Journal of Chemistry

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Published by Universitas Negeri Surabaya

ISSN : - EISSN : 22528180 DOI : https://doi.org/10.26740/ujc.v11n2

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

UNESA Journal of Chemistry is online Journal covering all aspects of Chemistry. The journal publishes original research paper and review articles.

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

Articles 10 Documents

Search results for , issue "Vol 11 No 1 (2022)" : 10 Documents clear

PENGARUH PEMBERIAN SIRUP PREBIOTIK UMBI YAKON TERHADAP AKTIVITAS ENZIM PENCERNAAN PADA DUODENUM Rattus norvegicus Leny Yuanita; Eka Yulia Maulidah
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Prebiotics are compounds that cannot be digested by digestive enzymes and can stimulate the growth of probiotics. Fructooligosaccharides are the most commonly used prebiotics. The purpose of this study was to determine the effect of giving prebiotic syrup of yakon tuber to the activity of amylase, protease, and lipase enzymes in the duodenum of Rattus norvegicus. The samples of this research were yakon tubers from the Wonosobo area and the experimental animal Rattus norvegicus. Experimental animals were divided into 4 groups. The group that was fed with water supplements (P0 = negative control), prebiotic syrup of yakon tuber S0 (P1), prebiotic syrup of yakon tuber S1 (P2), and commercial FOS (P3). Determination of enzyme activity of amylase, lipase, and protease using UV-Vis spectrophotometer instrument. Statistical analysis used was ANOVA and Post Hoc = LSD. The results showed that the administration of prebiotic syrup of yakon tubers S1 could significantly increase the activity of amylase, lipase and protease enzymes (P < 0.05). In the provision of prebiotic syrup of yacon tubers S0 can increase the activity of amylase and protease enzymes, while the lipase enzyme has no significant effect. Key words: yakon tuber prebiotic syrup, amylase, protease, lipase

PENGARUH PEMBERIAN SIRUP UMBI YAKON TERHADAP KADAR KALSIUM TULANG FEMUR TIKUS PUTIH (Rattus Norvegicus) Leny Yuanita; Kelvin Rio K
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The research objectives were to determine: 1) the effect of yacon tuber syrup supplementation on on rat bone calcium levels 2) the correlation of the total amount of short chain fatty acids (ALRP) to the calcium levels of the femur. The experimental animal used was 36 Rattus norvegicus. Were divided into 3 groups of supplement treatment: 1) aquadest, 2) yacon tubers syrup, 3) commercial FOS. After 48 days of treatment, the femur bone was analyzed for calcium levels by the digestion method. The instruments used were HPLC to test ALRP levels, GC to test FOS levels, and AAS to test calcium levels. Data analysis was done through the One Way Anova test (α = 0.05), the Post Hoc LSD, and the product moment correlation. The results of the analysis showed 1) The increase in average calcium levels from the K(-) group to P1 was 1.211 mg/mL and the post hoc statistical test between the K(-) and P1 (p>0.05) groups showed no significant difference between yacon tuber syrup supplementation on calcium levels. mouse bones. 2) Correlation analysis shows the correlation coefficient of r = 0.394 so that there is a low relationship between the total amount of ALRP and calcium levels in the femur bones of experimental animals. Keyword : yacon, FOS, calsium, absorption

PENGARUH JUMLAH CROSSLINKER PADA SINTESIS MOLECULARLY IMPRINTED POLYMER (MIP) TERHADAP KEMAMPUAN ADSORPSI KLORAMFENIKOL Maria Monica Sianita; Magdalena Butar Butar
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

This study aims to determine the effect of variations in the amount of crosslinker on the adsorption capability of Molecularly Imprinted Polymer (MIP)-Chloramphenicol (CAP) which was analyzed using the High-Performance Liquid Chromatography (HPLC) instrument and identify the –NO2 functional group in the polymer with the best variation in the amount of crosslinker using the instrument. Fourier Transform Infrared Spectroscopy (FTIR). In this study, MIP was synthesized using CAP as a template, ethylene glycol dimethacrylate (EGDMA) as a crosslinker, methacrylic acid (MAA) as a monomer, benzoyl peroxide (BPO) as an initiator, and acetonitrile as a porogen. The results showed that the variation in the number of crosslinkers affected the adsorption capability of MIP with the composition between CAP: MAA: EGDMA, namely 1:3:18, resulting in the largest adsorption capability of 2,2 mg/g with an extraction percentage of 66.11%. The results of functional group identification with FTIR showed that NIP contained –NO2 group at wave number 1524.27 cm-1 while in MIP no –NO2 group was detected because most of the CAP had been extracted, and PB was made as a control polymer without adding template CAP. Keywords: Chloramphenicol, Molecularly Imprinted Polymer, Crosslinker, Adsorption Capability

Karakterisasi dan Uji Efektivitas Sediaan Gel Aloe vera Kombinasi Kitosan sebagai Antibakteri Staphylococcus aureus Sari Edi Cahyaningrum; Perintis Gita Susanti
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The study about development synthesis gel of Aloe vera combination chitosan as Staphylococcus aureus antibacterial has been done. This study has the aim to determine the effect of composition comparison of Aloe vera with chitosan on the characterization and effectiveness of Staphylococcus aureus antibacterial as a candidate for wound healing. The synthesis the gel of Aloe vera combination chitosan was made by mixing of Aloe vera and chitosan solution with weight variated 2:1; 1:1; and 1:2 (AvK1, AvK2, and AvK3), and addition of Na-CMC, glycerin, and propylene glycol, which the gel was neutralized until it reached pH 6,5–7,0. The gel preparation were characterized by organoleptic, measuring viscosity, functional groups identification, and effectiveness test of Staphylococcus aureus antibacterial by diffusion method. The results were shown based organoleptic observations by color, smell, and texture. The lowest viscosity measurement characterization was showed by AvK3 gel, which was 13.0412 mPa.s. The result functional groups identification of all gel preparations was indicated the presence of O–H and N–H stretching vibrations, C=O stretching vibrations, C–H bending vibrations, and C–O stretching vibrations. Staphylococcus aureus antibacterial test from gel of Aloe vera combination chitosan with various variations were shown effective result, which the strongest was shown by AvK1 gel with an inhibition zone of 26 mm. Key words: chitosan, Aloe vera, antibacterial, Staphylococcus aureus

ANALISIS KADAR FENOLIK, FLAVONOID DAN AKTIVITAS ANTIOKSIDAN UMBI BAWANG BOMBAI (Allium cepa L.) Mirwa Adiprahara Anggarani; Rizki Amalia
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Onions are included in the Alliaceae that is often used as a spice in cooking. Onions have potential as a natural antioxidants. The active compounds that act as antioxidants in onions are phenolic and flavonoid contents. The study aimed to determine the water content, ash content, secondary metabolite compounds, total phenolic contents, total flavonoid contents, and antioxidant activity of the onion bulbs (Allium cepa L.). The extraction method chosen was the multilevel maceration method using three different solvents according to their polarity. The solvents are dichloromethane, ethyl acetate, and 96% ethanol. The total extract obtained from dichloromethane, ethyl acetate, and 96% ethanol solvent was 3,661; 1,476; 72,612. The results showed that onions bulb had a moisture content of 64.7% in the wet form and 5.2% in the powder form. The ash content obtained was 5.64%. Phytochemical screening of onion bulb extracts revealed the presence of flavonoids, saponins, tannins, phenolics, quinones, steroids and triterpenoids. The total phenolic and total flavonoid contents of the onion bulb ethanol extract were 18,245 mg GAE/g extract and 3,381 mg QE/g extract. The IC50 value of the onion bulb ethanol extract is 78.723 μg/mL, which includes in the strong antioxidant group. Key words: onion bulb, total phenolic contents, total flavonoid contents, antioxidant activities

KARAKTERISASI FILM PVA/KITOSAN/ZEOLIT TERSUBTITUSI ION Ag+ BERPOTENSI SEBAGAI KEMASAN AKTIF Dina Kartika Maharani; Rizka Dwi Safitri
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The need for fresh food continues to increase. Fresh food has a short shelf life. This can be overcome by active packaging containing antimicrobial substances. Zeolite is modified by ion exchange with silver, where silver acts as an antimicrobial agent. This study aims to study the changes in the mechanical properties of the PVA/chitosan mixture with the addition of zeolite-Ag compared to without the addition of zeolite-Ag. The variation in this study is the addition of zeolite-Ag to the PVA/CS composite, namely (0.025; 0.05; 0.1; 0.2)%. The films that have been made were analyzed in terms of mechanical properties, FTIR, and surface morphology microstructure. Composite films containing zeolite-Ag showed an increase in tensile strength and elasticity, where confirmed zeolite can be used as a reinforcing material in polymer matrices. The composite film with 0.025% zeolite-Ag content has a tensile strength value of 46.534 MPa, because zeolite-Ag can be homogeneously dispersed in the polymer matrix. FTIR analysis showed that the mixture of PVA and chitosan proved to be uniformly mixed. Morphological microstructural analysis showed homogeneous surface results, there was no visible appearance of zeolite-Ag aggregates on the PVA/CS film, whereas on films containing 0.025% zeolite-Ag there was a heterogeneous surface and the appearance of black circles indicating the presence of zeolite-Ag. Key words: characterization, film composite, zeolit, silver

PENGARUH JUMLAH POROGEN PADA SINTESIS MIP (MOLECULARLY IMPRINTED POLYMER) TERHADAP ADSORPSI MIP-KLORAMFENIKOL Maria Monica Sianita; Trifena Meysia Yusuf
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The purpose of this study was to determine the effect of porogen acetonitrile volume during the synthesis of Molecularly Imprinted Polymer (MIP) toward the adsorption capability of chloramphenicol and to determine the characteristics of the functional groups contained in Non Imprinted Polymer (NIP) and MIP. The porogen variations used were 30 mL, 45 mL, dan 60 mL. The effect of volume of porogen to adsorption capability will be measured using High Performance Liquid Chromatography (HPLC) instruments, while the functional groups on NIP and MIP will be characterized using Fourier Transform Infra Red (FTIR). MIP was synthesized using the precipitation method. The results showed that the 60 mL of the porogen variation gave the highest adsorption capability value compared to other variation which was 7.32 mg/g. Characterization with FTIR showed that the presence of NO2 group in NIP which was indicated at wave number 1517.56 cm-1 and 1549,08 cm-1 while in MIP the NO2 group was detected at wave number 1553.07 cm-1 with lower intensity. Key words: MIP, chloramphenicol, acetonitrile, adsorption capability.

SIFAT MEKANIK FILM KITOSAN/PVA DENGAN ZEOLIT TERSUBSTITUSI PERAK SEBAGAI KEMASAN AKTIF Dina Kartika Maharani; Weka Firda Rizki Nurzulla
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

The discussion about adding silver-substituted zeolite on the composite chitosan/PVA has been done with the percentage of silver-substituted zeolite (0,025;0,05;0,1; and 0,2(%w/v)). The ion exchanged between zeolite and silver by immersion method, which is ions Ag+ will doped on to zeolite replace the ions Na+. The Chitosan/PVA films have been obtained are characterized using FTIR and SEM and tested for mechanical properties using Autograph Microcomputer Control Universal Testing. The obtained data indicated that adding zeolite doped with silver increase the mechanical properties of a film. The best mechanical properties showed on addition zeolite/Ag 0,2 (% w/v) with tensile strength 32,733 MPa, elongation at break 42,8%, and modulus young 0,765 Mpa. Functional group identification result by FTIR showed a shift in the O-H and N-H vibration to a lower frequency caused by the addition of zeolite/Ag to the film. Morphological characterization using SEM showed that there are differences on surface morphology between chitosan/PVA before and after the addition of silver-substituted zeolite, Scanning Electron Microscope (SEM) results show there is small particles due to the presence of Zeolit/Ag. Key words: Chitosan, Zeolite, Silver, Mechanical Properties

Preparasi dan Karakterisasi Komposit Kitosan-ZnO sebagai Agen Hidrofobik pada Kain Katun Dina Kartika Maharani; Kayla Naulia Fadhila
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

This study aims to make a composite material from chitosan and ZnO as well as its application as a hydrophobic agent for cotton fabrics through a chitosan-ZnO composite coating process on cotton fabrics. The manufacture of chitosan-ZnO composites used the sol-gel method with variations in the volume ratio of chitosan to ZnO, namely 7:3, 6:4, 5:5, 4:6 and 3:7. The hydrophobicity of cotton cloth coated with chitosan-ZnO composite was measured using the water contact angle (WCA) method and the highest water contact angle was 131º for the variation of chitosan: ZnO of 7:3. Characterization of chitosan-ZnO composites using FTIR and XRD instruments The FTIR results show an interaction of chitosan with ZnO, this is supported by the presence of C=O groups observed at wave numbers 1556 cm-1, C-N groups appear at 1397 cm-1 and 1338 cm-1, –OH and –NH groups are detected at 3242 cm-1, O-Zn-O bonds were identified at 425 cm-1 and also –C-O-C- bonds between the chitosan group and ZnO were seen at 1019 cm-1 and 1052 cm-1. XRD results showed peaks at 2θ 37.1º, 246.82º and 68.31º indicating the presence of a ZnO nanoparticle crystalline phase and characteristic peaks of chitosan at 2θ 10.6º and 2θ 21.8º. The results of FTIR and XRD characterization show that the chitosan-ZnO composite has been successfully synthesized. Key words: Hydrophobic, Chitosan-ZnO Composites

Pengaruh Penambahan SiO2 dan TiO2 terhadap Sifat Hidrofobik Komposit Kitosan- ZnO Pada Kain Dina Kartika Maharani; Nur Lailiyah
Unesa Journal of Chemistry Vol 11 No 1 (2022)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

This study purposed to determine the effect of adding TiO2 sol and SiO2 sol to chitosan-ZnO composites on the hydrophobic properties of fabrics through the fabric coating process. The data obtained of consisted qualitative and quantitative data. Data analysis used qualitative descriptive manner. The addition of TiO2 and SiO2 to Chitosan-ZnO using the sol-gel method. Composite coating on the fabric using the dip-coating method with a volume ratio of TiO2:ZnO 1:1 and SiO2:ZnO 1:1. Hydrophobicity test using the WCA method obtained contact angle of the chitosan-ZnO is 101o, chitosan-TiO2/ZnO is 142o and chitosan-SiO2/ZnO is 127o, then characterized using FTIR, showed the interaction of chitosan and ZnO marked by a peak in the area of 430 cm-1; 1556 cm-1; 1397 cm-1; 1338 cm-1; 3242 cm-1; 1052 cm-1 and 1019 cm-1. The formation of Chitosan-ZnO/TiO2 was seen from the wave shift and changes in the absorption intensity of Chitosan-ZnO at peak of 3242 cm-1 to 3450 cm-1; 1556 cm-1 to 1548 cm-1; 1397 and 1338 cm- 1 became 1400 and 1336 cm-1; 1052 and 1019 cm-1 became 1151 and 1023 cm-1 and a new peak appeared at 850 cm-1. The formation of Chitosan-ZnO/SiO2 was seen from the wave shift and changes in the absorption intensity of Chitosan-ZnO at peak of 3242 cm-1 to 3257 cm-1; 1556 cm-1 to 1589.34 cm-1; 1397 and 1338 cm-1 becomes 1401 and 1342 cm-1; 1052 and 1019 cm-1 becomes 1066 and 1020 cm-1 also new peaks of 938 cm-1. Keywords: Chitosan-ZnO Composite, TiO2, SiO2, Hydrophobic

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Home Page

OAI Link

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Contact Name Dina Kartika Maharani

Contact Email dinakartika@unesa.ac.id

Phone +628174140131

Journal Mail Official dinakartika@unesa.ac.id

Editorial Address Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia. 60231

Location Kota surabaya, Jawa timur INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Dina Kartika Maharani

Contact Email
dinakartika@unesa.ac.id

Phone
+628174140131

Journal Mail Official
dinakartika@unesa.ac.id

Editorial Address
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia. 60231

Location
Kota surabaya,

Jawa timur

INDONESIA