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Walisongo Journal of Chemistry
Published by Universitas Islam Negeri Walisongo Semarang
ISSN : 2549385X     EISSN : 26215985     DOI : 10.21580/wjc
Core Subject : Science,
Chemistry
Walisongo journal of chemistry is a peer reviewed and open access journal published by Chemistry Department, faculty of Science and Technology, UIN Walisongo Semarang. This journal covering all areas of chemistry including inorganic, organic, physic, analytic, biochemistry, and environmental chemistry. Walisongo Journal of Chemistry publish two issues annually (July and October). Article which accepted in this journal was written by Bahasa and English.
Arjuna Subject : -
Articles 203 Documents
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Characterization of Kaolin Deposits in Kutigi, Niger State, Northern Nigeria Joseph, Samuel Ominu; Olalekan, David Adeniyi; Moses, Aderemi Olutoye; Isah, Abubakar Garba; Sallau, Alhassan Adeku
Walisongo Journal of Chemistry Vol 6, No 2 (2023): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v6i2.17283

Abstract

Kaolinite is among the most important mineral resource of kaolin clay sample with numerous industrial applications. Its effective characterization in terms of its chemical composition, structure and thermal properties is important for streamline it specific industrial application. In this study, the mineralogical, thermal properties, surface morphology, surface area, structural functional groups and chemical compositions were determined using the X-ray diffraction (XRD), thermogravimetry analyser, scanning electron microscope (SEM), nitrogen adsorption-desorption BET, Fourier transform infrared spectroscopy (FTIR) and X-ray fluorescence (XRF) method. The major phases in the kaolin clay samples was the kaolinite with quartz, orthoclase, and albite as minor phases. the kaolin sample loss in weight was due to dihydroxylation. The kaolin particles were made of agglomeration of its irregular sized particles. The BET surface area of kaolin sample was 181.549 m2/g, with particle size of 2.98 nm and pore volume of 0.161 cc/g. The FTIR spectra showed presence of peaks for Si-O at positions 2359.48,1217.35, 1032.21, and 753.55 cm-1, while the Al-O group appeared at 1365.84, 912.65 and 668.21 cm-1. Elemental composition content results from XRF showed that SiO2 was 34.25 wt %, Al2O3 was 28.16 wt % as the major content while the minor content such as Fe2O3, MgO, TiO2, CeO2, K2O and ZrO2 were 1.17, 1.63, 1.59, 0.95, 0.37, and 0.27 wt % respectively.
Characteristics of Liquid Sugar from Cassava Flour Using Gelatinization, Liquefaction and Enzymatic Saccharification (amyloglucosidase and α-amylase) Processes Agustina, Tika; Elsyana, Vida; Alvita, Livia Rhea; Ramandani, Adityas Agung; Purnani, Mawar Siti
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20458

Abstract

Domestic sugar production is still insufficient to satisfy the national demand for sugar, and production costs are expensive. One of the ingredients that can be used to make liquid sugar is starch. This study aims to determine the response of the resulting reduced sugar by optimizing the substrate concentration, liquefaction, and saccharification time. The method used of Box Behnken Design (BBD) with combinations of 20, 30, and 40% substrate concentrations, liquefaction times of 20, 40, and 60 min, and saccharification times of 20, 40, and 60 min. The characteristics of cassava flour, such as moisture (9.208 ± 0.068%), ash (0.987 ± 0.001%), fiber (2.187 ± 0.033%), and starch (79.876 ± 0.000%), were satisfied on SNI 01-2905-1992. Liquid sugar made from cassava flour reduced the sugar content by 28.299 ± 0.101%. The optimal conditions were 40% substrate concentration, 60 min liquefaction time, and 60 min saccharification time. The characteristics of the validation liquid sugar are in accordance with the specifications for the quality requirements of SNI 01-2978-1992 in the form of moisture content, ash content, and reducing sugar of 5.194 ± 0.003%, 0.996 ± 0.000%, and 29.668 ± 0.761%, respectively. These results highlight the effectiveness of optimizing substrate concentration, liquefaction time, and saccharification time in producing high-quality liquid sugar from cassava flour. This optimization addresses the domestic demand for sugar. It provides a cost-effective solution by utilizing cassava flour, thereby supporting the local agricultural economy and potentially reducing reliance on imported sugar.
Analysis of the Quality of Waste Cooking Oil Resulted from Rejuvenation Using Raja Nangka Banana Peel Adsorbent with Variations in Mass of Adsorbent and Length of Adsorption Time Devianti, Vika Ayu; Arifiyana, Djamilah
Walisongo Journal of Chemistry Vol 6, No 2 (2023): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v6i2.18020

Abstract

Continuous use of cooking oil at high temperatures produces oil that is no longer suitable for help because it is not good for the body’s health. So that waste cooking oil can be reused, it needs to be processed to improve its quality by utilizing waste to increase its benefits. Raja Nangka, one of the banana types, is commonly used as raw material for making fried bananas, resulting in abundant banana peel waste. Therefore, this research aims to utilize Raja Nangka peel waste to rejuvenate waste cooking oil. Raja Nangka banana peel was cut into small pieces, dried, sifted, and then activated using KOH to increase its surface area so that its adsorption capacity increases. The results showed that the greater the adsorbent mass and the longer the adsorption time, the greater the ability to reduce the acid number and peroxide value in waste cooking oil. An adsorbent mass of 10 grams and a soaking time of 150 minutes were the best results for reducing the acid number and peroxide value.
Antibacterial Effectiveness of BS Endophyte Mushroom Extract on Media Growing Red Rice Iryani, Iryani; Pramesti, Radia Sagita; Riga, Riga; Ulfah, Mariam
Walisongo Journal of Chemistry Vol 6, No 1 (2023): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v6i1.13241

Abstract

BS endophytic Fungi is a Fungi isolated from the flower of the bitter plant (A. Paniculata) which is known to produce various secondary metabolites which are reported to have antibacterial bioactivity. This study aimed to determine the antibacterial activity of extract from endophytic Fungi BS isolated from bitter flower (A. Paniculata) on brown rice growing media against Streptococcus mutans, Staphylococcus aureus, and Pseudomonas aeruginosa bacteria. The method used is endophytic Fungi BS grown on media extracted by maceration method with solvent. The antibacterial activity test of the extract was carried out by disc diffusion method. The results obtained showed that the extract of the endophytic Fungi BS grown on brown rice media gave activity to inhibit the growth of Streptococcus mutans, Staphylococcus aureus, and Pseudomonas aeruginosa bacteria at concentrations of 10%, 30%, and 50%. In conclusion, the extract of BS endophytic Fungi isolated from A. paniculata flowers has potential as an antibacterial
Green Synthesis And Characterization of Zinc Oxide Nanoparticles Using Jatropha Curcas for Enhanced Antibacterial Potential Ovonramwen, Oluwaseyi Bukky; Nwaogu, Ngozi; Okunzuwa, Iyobosa Gift; Omoruyi, Uwaila
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20629

Abstract

Green-synthesized nanoparticles offer various advantages over conventionally physico-chemically synthesized nanoparticles. These synthesized nanoparticles have various biological and medicinal applications. In this study, zinc oxide nanoparticles were synthesized using the leaf extract of Jatropha curcas and zinc acetate dihydrate (as a precursor) for nanoparticle synthesis. The optical, functional group, morphological, and structural properties of the synthesized nanoparticles were investigated using ultraviolet-visible spectrophotometers (UV-Vis), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM), and the antibacterial analysis was done using the agar dilution method against some Gram-positive, Staphylococcus aureus, and Gram-negative E. coli, Klebsiella pneumonia, and Pseudomonas aeruginosa. The formation of ZnO NPs was confirmed by a change in the color of the reaction mixture. UV peaks at 290 nm confirm the presence of ZnO NPs. In contrast, the presence of various bioactive functional groups responsible for reducing the bulk zinc acetate dihydrate to ZnO NPs was confirmed using FTIR. SEM analysis showed that the nanoparticles are spherical. Green-synthesized JC-ZnO NPs demonstrated important antibacterial activities when tested against certain bacteria strains; this implies that plant-synthesized nanoparticles can be used to develop many critical biomedical products.
Activity Test of Methanol Extract of Young Stem Bark of Semambu rattan Plant (Calamus Scipionum Lour) with DPPH Method Hasana, Nazria; Yani, Dwi Fitri; Wijayanti, Fitria
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.17350

Abstract

The Semambu rattan (Calamus scipionum Lour) plant contains phenolic compounds, such as flavonoids and polyphenols that have the ability as antioxidants. Therefore, the community often consumes C scipionum Lour, and the stiff stems are made of crafts. However, the skin, the content of which is not scientifically known, is currently considered a waste in the community. This study was conducted to determine the results of phytochemical tests and the activity of methanol extract of young bark of the Semambu rattan plant (C. scipionum Lour). The bark of young Semambu rattan stems is extracted by maceration, and then the extract obtained is carried out by phytochemical screening. Antioxidant acrypability was measured using the DPPH method at a wavelength of 517nm. The results of phytochemical testing of young bark extract of C. scipionum Lour contain flavonoids, saponins, tannins, alkaloids and terpenoids. The research results on antioxidant young stem bark C. scipionum Lour with positive control in the form of ascorbic acid obtained results IC50 = 65.10 ppm, which is classified as a potent antioxidant. The conclusion of this study is that the extract of the young bark of Semambu rattan (C. scipionum Lour) can be used as an alternative antioxidant.
Analysis the Effect of Activated Natural Zeolites for Fe Metal Adsorption Fadliah, Fadliah; Palit, Christin; Pratiwi, Reno; Aryanto, Reza; Putri, Tri Widayati
Walisongo Journal of Chemistry Vol 6, No 2 (2023): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v6i2.17291

Abstract

Zeolite, as an adsorbent, can be improved by a chemical activation process. In this study, zeolite was activated using the acid activation method by soaking natural zeolite with HCl and HF, and the activated zeolite was then used to adsorb Fe metal. Zeolite was characterized using SEM and XRD, and the adsorption capacity of the zeolite was analyzed using AAS. The results of SEM analysis show that zeolite after activation has a more significant number of pores than zeolite before activation. The results of XRD analysis show that zeolite that has been activated has a higher content of quartz (SiO2) and clinoptilolite than zeolite that has not been activated. The results of the zeolite adsorption capacity and efficiency test on Fe metal showed that the most excellent adsorption capacity was when the contact time was 60 minutes, with adsorption capacity and adsorption efficiency values of 3.2403 mg/g and 97.21%.
Synthesis And Study of Antimicrobial Properties of Βeta-Tricalcium Phosphate/Silver Nanoparticles Saprianti, Siti; Gusrizal, Gusrizal; Syahbanu, Intan
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.21101

Abstract

Beta-tricalcium phosphate (β-TCP) is a compound used as a basic material for making bio-scaffolds and applied for controlled drug delivery and bone regeneration. This material has the advantages of osteoconductivity and biodegradability. However, this material has weaknesses in its antimicrobial properties, so it requires adding other ingredients to increase its ability, such as NpAg. This research aims to obtain β-TCP/NpAg, which has antimicrobial properties. This research started with NpAg, made β-TCP from a combination of Ca(OH)2 and H3PO4 synthesized β-TCP/NpAg, and tested antimicrobial activity using the disc method. The results of this study show that β-TCP has XRD characteristics in the diffraction pattern, such as 21,541, 25,339, 27,619, 30,881, 32,179, and 34,231. In addition, β-TCP/NpAg has XRD characteristics in the diffraction pattern, such as 25.90, 26.67, 27.95, 29.65, 31.17, 32.61, and 34.47, with the highest peak at 31.17, which is the diffraction pattern of NpAg. The antimicrobial β-TCP/NpAg results showed the ability to inhibit the test microbes by 84.37% on S. aureus, 95.17% on E. coli, and 38.83% on C. albicans.
The Use of Metals in the Voltaic Series and Its Implications on How Natural Batik Dye is Fixed Maghfiroh, Maghfiroh; Nugraheni, DIan; Widadi, Zahir; Murty, Daru Anggara; Fahria, Mila; Pratiwi, Novida
Walisongo Journal of Chemistry Vol 6, No 2 (2023): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v6i2.18110

Abstract

The presence of natural colorants in the batch industry supports efforts to create sustainable products. However, the disadvantage of natural coloring substance is that tissue fibers generally have a low affinity to the pigment components, so the natural colorant is easily flourishing. This fact is based on exploring natural coloring substances and the type of fixator of the corresponding natural coloring substance. In addition to strengthening the absorption of color substances into the fiber, the fixator also serves to know the direction of color produced by the natural coloring substance. In testing, fixers are used that contain metals present in voltaic series. The object of the study is to described the color characteristics produced by natural dyeing substances (secang and tegeran woods) on various types of fixers that are included in the voltaic series. Color quality is assessed from 3 aspects i.e. color intensity parameters visually, color resistance with grey scale and color direction with website coolors.co. In general, the secang wood produces the pink color (warm category) while the tegeran wood color is yellow (vintage category). There is a regular sequence of the color concentration of the fabric achieved by each voltaic series metal used as a fixer. If the metal is applied as a fixer to the natural coloring material, the stronger oxidative properties of a metal on the voltaic series, the older the resulting color will be. 
Determination of Heavy Metal Contents in Milk Samples: A Review Pari Condori, Guilmer Rony; Quisocala Herrera, Jhimmy Alberth
Walisongo Journal of Chemistry Vol 6, No 2 (2023): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v6i2.14471

Abstract

In the dairy industry, mining is the main industry that affects the production of this food and its dairy products, with the contamination of heavy metals such as lead (pb), cadmium (cd) and mercury (Hg), a investigation of the different scientific articles, the purpose of this article is to present the different methods used to determine the concentrations of contaminants, such as the use of atomic absorption spectrometry in cow's milk, the method in this investigation begins with the collection of information from the bibliographic database of abstracts and citations of scientific articles Scopus, the selection of scientific production, working with fifty (50) scientific articles, with a maximum age of five (5) years having a subject in common, about the contamination of milk and dairy products, mass spectrometry to determine the level of contamination produced in milk , result that the concentrations of heavy metals such as lead, cadmium and mercury exceed in all the samples analyzed, the FDA recommended permissible limits mainly that are greater than 0.020 mg / kg.

Page 15 of 21 | Total Record : 203

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