Article Per Year (5 Year)
p-Index From 2020 - 2025
1.376
P-Index
This Author published in this journals
All Journal VALENSI EduChemia: Jurnal Kimia dan Pendidikan Bulletin of Chemical Reaction Engineering & Catalysis Kimia Padjadjaran
Yulyani Nur Azizah
Department Of Chemistry, Science And Technology Faculty, Syarif Hidayatullah Islamic State University, South Tangerang, 15412, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Materials Science & Nanotechnology

Published : 7 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 7 Documents
Search

 1 
Facial Mask Formulation Enriched with Moringa Leaves (Moringa oleifera) Extract and Their Activity as Antioxidants and Antibacterials Hendrawati Hendrawati; Yulyani Nur Azizah; Niah Kusuma Hapsari
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 6, No. 2, November 2020
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v6i2.16982

Abstract

Moringa leaves (Moringa oleifera) are useful for skin health as an additional ingredient for cosmetics, such as facial mask. This study aims to determine the optimum formula of Moringa leaves extract in powder mask, evaluate its activity as an antioxidant and antibacterial, while also ascertaining its characteristics, based on the quality requirements of SNI 16-6070-1999 and SNI 16-4399-1996 for cosmetics and skin moisturizers, respectively. Facial mask formula was made through various concentrations of Moringa leaves methanol extract 12.5%, 17.5%, 25%, and 35%, with its optimum formulation determined by panelists’ preference level, based on organoleptic test results. Furthermore, the antioxidant activity was carried out, using the 1,1-diphenyl-2-picrylhydrazil (DPPH) method, while that of the antibacterial towards Staphylococcus aureus bacteria was performed, through the use of the diffusion technique, with the active compound also being analyzed, using GC-MS (Gas Chromatography-Mass Spectrophotometry). The results however, showed that the antioxidant and antibacterial activities in the facial mask formula were lower than when in their extract form. The facial mask formula with the addition of 35% Moringa leaves extract (F4), had the highest inhibitory value of 66,04%, while the antibacterial activity against S. aureus occured at concentrations ≥ 0.125 g/mL. Also, the result of GC-MS analysis of Moringa leaves extract, showed quinic (peak 7, Rt = 21,165 minutes) and linoleic acid as the highest peak (peak 12, Rt = 29,439 minutes). Based on panelists' preference level, the result of Anova and Duncan Test analysis showed that the most optimum facial mask product was with 17.5% Moringa leaves extract (F2), with a score of 3.29. Therefore, all characterization of mask formula with 12.5%, 17.5%, 25%, and 35% additional amount of Moringa leaves extract, have met up with the requirements for SNI 16-6070-1999 and SNI 16-4380-1996 criterias, together with the pH value of 5.45 - 6.02, specific gravity 1 g/mL, emulsion stability 96.57 - 97.05%, and negative microbial contamination.
Synthesis, Characterization and Antioxidant Activity of Kobalt (II)-Hydrazone Complex Yulyani Nur Azizah; Irma Mulyani; Deana Wahyuningrum; Damar Nurwahyu Bima
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (623.189 KB) | DOI: 10.30870/educhemia.v5i2.7987

Abstract

The potency of the first-row transition metal complexes with Schiff's base ligand as an antioxidant has been widely studied by researchers. In this study, hydrazone-type Schiff base compounds, salicylaldehyde-2,4-dinitrophenylhydrazone (SDPH), resulted from the condensation of salicylaldehyde (1.5 mmol) and 2,4-dinitrophenylhydrazine (1.5 mmol) were synthesized and characterized with 1H-NMR. The synthesized SDPH was used as ligands in the formation of Co(II) metal complexes. The Co(II)-SDPH complexes were synthesized with reflux reaction at 60oC for 6 hours in molar ratio 1:3. Triethylamine is used to synthesis Co(II)-SDPH, which serves to deprotonate SDPH ligands. ESI-MS analysis showed that the complex is a neutral dimeric complex.The complex has the chemical formula [Co2(SDPH)2[(Et)3N]2(acn)2(OH)2} ([M+Na]+ = 1061 g/ mol), shown on the ESI-MS spectrum. Coordinate bonds between Co (II) metal ions with ligands are observed in the presence of shifting of the C=N wave number, as well as the loss of the vibrating peaks of the O-H groups to the infrared spectra of complexes. The IR spectrum of complexes was suggested that SDPH behave as a bidentate ligand through the azomethine nitrogen atom and phenolic oxygen atom. The ligand and its Co(II) complex have been screened for antioxidant activity against DPPH (2,2-diphenyl-1-picrylhydrazine). Based on the activity test results, the IC50 value of Co(II)-SDPH complex was lower than ligand. These results show that Co(II)-SDPH are potentials as antioxidants.
Structure Prediction and Ultrasonic Assisted Synthesis of Coordination Compound Cadmium (II) Bromide with N,N’-diethylthiourea Ligand Susanti, Yuni; Fariati, Fariati; Effendy, Effendy; Azizah, Yulyani Nur
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 1, May 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i1.30868

Abstract

Cadmium (II) halides with N,N'-diethylthiourea (detu) ligands at a stoichiometry of 1: 2 tend to form molecular complexes [Cd(detu)2X2] with a distorted tetrahedral geometry at the central atom. Generally, these complex compounds are prepared by the conventional method of reflux for 4 hour. The use of ultrasonic waves for complex synthesis can be an alternative to make the reaction time more efficient and environmentally friendly. The aim of this study was to synthesize and characterize complex compounds from CdBr2 and detu ligands using the ultrasonication method that have not previously reported. The synthesis of complex compounds was carried out by reacting CdBr2 and detu (1:2) in methanol solvent. In the synthesized compounds, a melting point test, electrical conductivity test, Fourier Transform Infrared (FTIR), Scanning Electron Microscope-Energy Dispersive Xray (SEM-EDX), qualitative test of bromide ion and calculation of free energy using Spartan'14 software were carried out for the complex structure prediction. The complex compound resulted has colorless needle crystals with a melting point of 93-94°C. The results of the EDX analysis provide the empirical formula C10H24CdBr2N4S2. The electrical conductivity test data and the bromide ion qualitative test proved that the synthesized complex compound was a molecular complex compound with the molecular formula [Cd(detu)2Br2]. The complex compound has two possible structures, namely a distorted tetrahedral and a square planar. Free energy calculations showed that complex compounds with a distorted tetrahedral structure and a square  planar have free energies of -527.5574 kJ/mol and -408.7424 kJ/mol, respectively.
Synthesis of MgFe2O4 Nanoparticles and its Application for Photodegradation of Methylene Blue Sukandar, Dede; Adawiah, Adawiah; Rohman, Saeful; Fitria, Shella; Saridewi, Nanda; Farishi, Salman; Nurhasni, Nurhasni; Aziz, Isalmi; Azizah, Yulyani Nur
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 4 Year 2024 (December 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20222

Abstract

Methylene blue wastewater from the paper, clothing, and textile industries can adversely affect aquatic ecosystems if improperly treated. One method to treat methylene blue pollutants in sewage is through photocatalysis techniques using magnesium ferrite (MgFe2O4) nanoparticle-based semiconductors. The MgFe2O4 is effective for methylene blue degradation because it is stable in aqueous systems, inexpensive, and has good photocatalytic activity. This study aims to synthesize MgFe2O4 nanoparticles with pumpkin seed extract (Cucurbita moschata) as a capping agent through a hydrothermal method. Characterization results show that MgFe2O4 nanoparticles synthesized with the addition of 3 mL pumpkin seed extract have a crystal size of 3.87 nm, cubic spinel structure, average particle size of 29 nm, and band gap energy value of 1.94 eV. The MgFe2O4 nanoparticles produced optimum degradation efficiency under mercury lamp irradiation with a degradation capacity of 391.98 mg/g at pH 12. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Studi Penambatan Molekul Peptida Bioaktif Kacang Kedelai (Glycine max) Hasil Hidrolisis In Silico Terhadap Reseptor hER-α (3ERT) Fitri, Dhea Ameliana; Hermanto, Sandra; Azizah, Yulyani Nur
Kimia Padjadjaran Vol 1, No 2 (2023)
Publisher : Kimia Padjadjaran

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

Abstract

Kanker payudara adalah penyakit yang umumnya lebih sering diderita oleh Wanita yang ditandai dengan tumbuhnya sel abnormal pada lobula payudara  serta dapat bermetastasis ke organ tubuh yang lain. Peptida glisinin dan  - conglisinin hasil hidrolisis dari kacang kedelai terbukti memiliki aktivitas sebagai antikanker secara in vitro. Penelitian  ini bertujuan untuk mengetahui karakterisasi dan potensi fragmen peptida glisinin dan -conglisinin serta afinitas  penghambatannya terhadap reseptor protein hER-α (PDB ID: 3ERT) yang merupakan protein target proliferasi sel  kanker payudara secara in silico. Metode penelitian meliputi preparasi ligan (fragmen glisinin dan -conglisinin),  virtual screening ACP 2.0 serta validasi docking dengan Autodock dilakukan untuk mengamati nilai Root Mean  Square Deviation (RMSD) pada hasil penambatan ligan alami. Penambatan peptida bioaktif hasil hidrolisis glisinin  dan -conglisinin teroptimasi dengan protein hER-α mengacu pada parameter ikatan yang terjadi dan visualisasi  terhadap protein target. Hasil penelitian menunjukkan bahwa fragmen peptida glisinin MIYPG memiliki kemampuan  sebagai antikanker payudara dengan nilai ∆Gibbs -9,35 kkal/mol, masih rendah dibandingkan dengan kontrol positif  yaitu tamoksifen dengan ∆Gibbs -11,21 kkal/mol. Interaksi fragmen peptida glisinin MIYPG dengan reseptor hER- α distabilkan melalui ikatan hidrogen gugus OH dari ligan dengan residu asam amino Phe 404 (2,24 A) yang bekerja  dengan cara antagonis terhadap estrogen (native ligan).
Natural Zeolite as Mo and MoP Catalysts Support for Catalytic Deoxygenation of Jatropha Oil Aziz, Isalmi; Farhan, Muhammad; Saridewi, Nanda; Azizah, Yulyani Nur; Muawanah, Anna; Nurbayti, Siti; Dwiatmoko, Adid Adep; Adhani, Lisa
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.45272

Abstract

Non-edible oil, such as Jatropha oil, is an interesting feedstock for the development of renewable diesel (green diesel). Catalytic deoxygenation using natural zeolite-supported Mo-based catalysts is a promising process for the conversion of Jatropha oil to green diesel. Mo and MoP catalysts supported on natural zeolite were synthesized by wet impregnation at a concentration of 5% (w/w). The catalysts were characterized by XRD, XRF, SAA and NH3-TPD. The catalysts were successfully synthesized with the appearance of Mo and MoP peaks on the catalyst diffractogram. XRF results also showed that Mo and P were present in the catalyst. Metal impregnation decreased the surface area and pore volume of the catalyst, but increased the average pore diameter. The NH3-TPD profile of the catalyst showed that the weak acid sites of both catalysts were larger than the strong acid sites. Based on the activity test of catalytic deoxygenation of Jatropha oil, the MoP/HZ catalyst produced a higher conversion (67%) and liquid product yield (79%) than Mo/HZ. This is associated with a larger pore diameter, so that the distribution of reactants on the catalyst surface is more optimal. However, the highest green diesel selectivity of 82% is produced by the Mo/HZ catalyst. The Mo/HZ catalyst is more oriented towards the HDO reaction, whereas the MoP/HZ catalyst is more oriented towards the DCO/DCO2 reaction.
Synthesis and Characterization of Low Molecular Weight Irradiated Chitosan in Various Water Levels and Gamma-Ray Doses Rosspertiwi, Reni; Yunus, Ade Lestari; Rahayu, Dien Puji; Nurlidar, Farah; Azizah, Yulyani Nur
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 1, May 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i1.36509

Abstract

Chitosan is a biopolymer derived from marine animal shell waste that exhibits numerous pharmacological activities. However, its high molecular weight limits the application in various fields due to its low solubility. Therefore, this study aims to synthesize low molecular weight chitosan using varying water content and doses of gamma irradiation. To initiate chitosan degradation, H2O (5 and 10 mL) was added, followed by gamma ray irradiation at doses of 5 and 10 kGy. The Molecular Weight (MW) of degraded chitosan was determined using Gel Permeation Chromatography (GPC), while Fourier Transform Infrared Spectroscopy (FTIR) was used to characterize the functional groups and degree of deacetylation of chitosan. The study found that the molecular weight of irradiated chitosan decreased as the irradiation dose and H2O addition increased. The addition of 10 mL of water and gamma irradiation at a dose of 10 kGy has been found to reduce the molecular weight of chitosan to 118 kDa, with a high deacetylation degree of 86.78%. The FTIR analysis showed no significant changes in the functional groups, indicating that gamma irradiation did not affect the structure of chitosan.
Co-Authors adawiah adawiah, adawiah Anna Muawanah Damar Nurwahyu Bima Deana Wahyuningrum Dede Sukandar Dwiatmoko, Adid Adep Effendy Effendy Farah Nurlidar Fariati Fariati, Fariati Farishi, Salman Fitri, Dhea Ameliana Fitria, Shella Hendrawati Hendrawati Irma Mulyani Isalmi Aziz Lisa Adhani Muhammad Farhan Nanda Saridewi, Nanda Niah Kusuma Hapsari Nurhasni Nurhasni Rahayu, Dien Puji Rosspertiwi, Reni Saeful Rohman Sandra Hermanto Siti Nurbayti Yuni Susanti Yunus, Ade Lestari