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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.
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Articles 203 Documents
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Aktivitas Daun Jambu Air (Syzygium Samarangense (BL.) Merr Et. Perry) serta Optimasi Suhu dan Lama Penyeduhan Ulil Albab; Ratih Rizqi Nirwana; R. Arizal Firmansyah
Walisongo Journal of Chemistry Vol 1, No 1 (2018): 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.v2i1.2670

Abstract

Radikal bebas merupakan suatu senyawa yang dapat menyebabkan kerusakan dan struktur pada fungsi sel yang dapat dicegah dengan antioksidan. Antioksidan dihasilkan dari ekstraksi seperti pada air seduhan teh. Penelitian ini dilakukan untuk mengetahui suhu dan waktu yang optimum dalam mengesktrak daun jambu air (Syzygium samarangene  (BL.) Merr.et Perry) dan mengetahui nilai aktivitas antioksidan berupa Inhibisi Consentration (IC50). Dalam penelitian ini metode yang digunakan berupa Rancangan Acak Lengkap (RAL) yang disusun secara terpisah dan dirancang secara faktorial (4 x 3) dengan 3 ulangan. Faktor pertama adalah suhu yaitu 70°C,  80°C,  90°C, 100°C.  Faktor kedua adalah waktu  yaitu 5 menit, 10 menit, 15 menit. Untuk mengetahui aktivitas antioksidannya berupa IC50 digunakan metode penangkal radikal bebas DPPH (1,1 –diphenyl-2-picylhydrazyl). Kemudian hasil absorbansi dari spektrofotometer Visibel  dianalisa statistik menggunakan uji Kruskal-Wallis yang menyatakan bahwa suhu tidak berpengaruh terhadap aktivitas antioksidan ekstrak daun jambu air Semarang. Sedangkan waktu berpengaruh terhadap aktivitas antioksidan ekstrak daun jambu air Semarang. Suhu dan waktu optimum penyeduhan yang disarankan yaitu pada 70oC selama 5 menit dengan persen (%) hambatan yaitu 77,46%. Sementara itu aktivitas antioksidan ditunjukan dengan nilai IC50 yaitu 41,01 ppm.
The Identification of Electrolyte Property of Humus-Contained Andosol Soil Using Cu-Zn Electrodes Irvan Maulana Firdaus; Diva N.M.D. Masyitoh; Tharra A.N. Azizah; Febiyanto Febiyanto
Walisongo Journal of Chemistry Vol 3, No 2 (2020): 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.v3i2.6202

Abstract

This study investigated the electrolyte property of humus-contained andosol soil using Volta cell. The electrodes that are used were Cu and Zn for cathode and anode, respectively. This research was done by varying electrode area and distance between Cu and Zn electrodes. The varied electrode area was 20, 30, and 40 cm2, whereas the electrode distance was 3, 4, and 5 cm. Then, the current and voltage profiles of Volta cell system were measured using a digital multimeter. The result showed that humus-contained andosol soil has an electrolyte property. Electrolyte property of andosol soil might be due to the humus substance that has a high cationic-exchange capacity. Besides, it showed that the increase of the electrode area, the current and voltage were increased gradually. In contrast, the increase in current and voltage could be found by the decrease of electrode distance. In addition, the use of 24-Volta cells system enhancing current and voltage compared to a single cell. It suggests that the increase of current and voltage was relatively proportional to the number of Volta cell. Therefore, this research can be a reference for the identification of electrolyte property of natural or waste materials.
Synthesis and Characterization of Cellulose–Curcumin Nanofiber as a Biomaterial Mask Novrynda Eko Satriawan; Muhamad Nasir; Fasih Bintang Ilhami
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.9628

Abstract

This study was conducted to characterize cellulose acetate-curcumin composite nanofibers synthesized using the electrospinning method, as a biomaterial mask with antibacterial and antiviral properties. Cellulose acetate-curcumin composite nanofibers were successfully synthesized at a flow rate of 1 mL/hour, a needle-collector distance of 17 cm, and a voltage of 22 kV. The resulted nanofibers have an average diameter in the range of 378.89 nm - 461.76 nm. Based on the results of the FTIR spectrum, no significant shift was found. The results of the contact angle test showed that the average contact angle value increased with the addition of curcumin concentration. The mechanical test results showed that variations in the concentration of curcumin were able to increase the tensile strength and strain values.
Synthesis of Curcumin Derivatives (2.5-Bis((E)-4-Hydroxy-3-Methoxy Benzylidine) Cyclopenta-1-On) from Vanillin and Its Activity Test Against Α-Glucosidase Enzymes Rahma Diyan Martha; Danar Danar; Rini Retnosari
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.8905

Abstract

Synthesis of curcumin analogs (2.5-Bis((E)-4-Hydroxy-3-Methoxy Benzylidine) Cyclopenta-1-On) based on Claisen-Schmidt condensation using an acid catalyst and inhibition of glucosidase enzyme was carried out. The antidiabetic activity of curcumin analogs was carried out by the use of α-glucosidase enzyme from moldy rice (Oryza sativa). The curcumin analogs were synthesized by reacting the vanillin with cyclopentanone.  The structure of all products was confirmed by FTIR, GC-MS, 1H-13C-NMR spectrometers, and the activity enzyme. The results showed the curcumin analogs were yielded in 52.27%, respectively as yellowish-green solid. The inhibition test of the α-glucosidase enzyme showed that the curcumin analogs were the potential to inhibit the α-glucosidase enzyme with an inhibition percentage of about 94.26% in 5 mM.
The Effect of Storage Time on the Quality of Immersion Oil Made from Kesambi (Scheichera Oleosa) in the Image of Onion Cell Plant Zakarias Adrianto Mautuka; Martasiana Karbeka; Monika Molina; Suratno Suratno
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.9338

Abstract

The need for immersion oil becomes very important in carrying out various laboratory analyses with a microscope to clarify the image of objects with sharp imaging. To answer this need, research has been carried out to find an alternative to immersion oil by utilizing one of the typical Alor plants that grow a lot in dry areas, namely Kesambi. In this study, the results of the immersion oil test from Kesambi which was made in 2016 were compared with the results of the retest of the same oil in 2021 and compared with standard immersion oil to determine the quality of the immersion oil. In the existing stock of Kesambi immersion oil, physical properties analysis, GC-MS, and imaging of onion cells were carried out. The results showed that the comparison of the physical properties of Kesambi immersion oil which was analyzed in 2016 and the results of the re-analysis in 2021 showed that there was no significant difference based on the parameters of density, viscosity, refractive index, acid number, and aperture value. Results GC-MS in standard immersion oil only contained 49.68% benzyl benzoic acid and reanalyzed Kesambi immersion oil found palmitic acid 12.26%, oleic acid 46.46%, stearic acid 5.26% arachidic acid 13, 84%, and other spectra were detected as impurities. Although there were impurities and differences in fatty acid content between the standard immersion oil and the immersion oil from Kesambi that had been stored for five years, there was no difference in the imaging results of onion cells.
Adsorption of Cd (II) into Activated Charcoal from Matoa Fruit Peel Kustomo Kustomo; Naila Lajja Zulfa Faza; Andreas Haarstrick
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.11755

Abstract

Cadmium (Cd) is one of the heavy metals with a high level of contaminants that is environmentally harmful and can interfere with human health. This study aims to determine the adsorption capacity and adsorption kinetics of Cd (II) from Matoa fruit peel activated by nitric acid. The adsorption method can be used to treat Cd (II) waste in the water. Activated charcoal is used for adsorption. The charcoal produces a relatively 1.17 % ash content, 3.92 % water content, and a 507.64 mg/g iodine absorption test. Based on the results of FTIR characterization, it is known that the O-H and C=O groups play an important role in adsorption. The SEM-EDX characterization produced a carbon content of 99.21 %. At pH 9, activated charcoal adsorbs Cd (II) metal effectively, with a contact time of 40 minutes and a concentration of 20 ppm. The activated charcoal of Matoa fruit peel activated by nitric acid had an adsorption capacity of 59.75 mg/g. It used a pseudo-second-order reaction for the chemical kinetics equation and the Langmuir adsorption isotherm equation for the adsorption isotherm.
The Synthesis of Triamine Group Modified Silica Hybrid Material Coated on Muara Kencan Iron Sand for Hg (II) Adsorption Ricka Prasdiantika; Dony Allan Pratama; Agustien Zulaidah; Eny Apriyanti; Suharman Suharman
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.9013

Abstract

Hg metal was toxic and harmful to the environment because it does not biodegradation, can accumulate in living things, and pollute waters. One method that can be used was adsorption by inorganic-organic hybrid materials. This study aims to synthesize a triamine group modified silica hybrid material coated on iron sand or Magnetic Materials@Silica@Triamine (MM@SiO2@TA) to adsorb Hg(II) metal ions. The study began with the preparation of the iron sand of Muara Kencan Beach using magnets, washing using a solution of 1 M HCl and 0.5 M HF, and coating the material using sodium silica (SiO 25.5-28.5%) modified by a 99% triamine group with co-precipitation. The XRF characterization results showed that the magnetic material of the iron sand of Muara Kencan Beach has an iron oxide (magnetite) content of 73.31%. The iron oxide content increased after washing with HCl solution to 79.12% and HF solution to 81.81%. The results of FTIR, XRD, and TEM characterization showed that the MM@SiO2@TA was successfully synthesized with a size of 63.43 nm. The MM@SiO2@TA was tested to adsorb metal ion Hg(II) at a concentration of 100 ppm, pH 6, and a contact time of 1 hour. The AAS results showed that MM@SiO2@TA could adsorb metal ions Hg(II) as much as 60.82 ppm or 60.82%.
Determination and Characterization of Lycopene Compounds from N-Hexane Fraction of Tomato Fruit (Solanum Lycopersocum Grandyfolium) by using Fourier Transform Infrared and UV-Vis Spectrophotometry Arfiani Nur; Hajrah Hajrah; Asriani Ilyas; Aisyah Aisyah; Maria Cecilia Lezama Escalante
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.10885

Abstract

Determination and characterization of the lycopene content of the n-hexane fraction from potato-leaved tomato (Solanum lycopersicum grandyfolium) using Fourier transform infrared (FTIR) spectrophotometry and UV-Vis spectrophotometry. This study aims to determine the levels and characterization of lycopene compounds from potato-leaved tomato fruit using FTIR and UV-Vis spectrophotometers. The methods in this research include maceration, liquid-liquid extraction, crystallization with antisolvent, chromatography with three eluent systems, identification of lycopene compounds, and characterization of lycopene compounds using FTIR and UV-Vis. The results showed the presence of lycopene compounds based on the spectrum with absorption peaks at wave numbers 2924, 18 cm-1 and 2863, 66 cm-1 indicating C-H (stretching); 1637, 43 cm-1 indicating C=C alkene; and the wave numbers of 1461, 63 cm-1 and 1422, 46 cm-1 indicating the presence of a CH2 (bending) functional group. The results of UV-Vis spectrophotometric characterization showed the presence of lycopene compounds at three main wavelengths, namely at 445, 467, and 500 nm. The level of lycopene compounds produced from the n-hexane extract of potato-leaved tomato fruit was 7.25 mg/gram
Anti-Cancer Activity Testing of Cumin (Plectranthus Amboinicus) Ethanol Extract Against Artemia Salina Leach by Using Brine Shrimp Lethality Test (BSLT) Method ika Rachutami; Rahma Diyan Martha; Afidatul Muadifah; Algafari Bakti Manggara
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.9086

Abstract

The purpose of this study was to determine the anticancer activity of cumin leaf extract (Plectranthus amboinicus), which was applied using the Brine Shrimp Lethality Test (BSLT) method to determine the level of acute toxicity (LC50) of the extract against Artemia salina LEACH larvae. Cumin leaf samples were extracted using the maceration method with 96% ethanol. The cumin leaf extract was then tested qualitatively and quantitatively. Toxicity testing used concentrations of 500 ppm, 1000 ppm, 1500 ppm, 2000 ppm, and 2500 ppm, which were given to Artemia salina LEACH larvae for 24 hours. Calculate the LC50 value in this study using probit analysis. The results of qualitative and quantitative testing showed the presence of saponins by 5.20%, tannins by 8.21%, flavonoids by 23.93%, and alkaloids by 4.37%. The results of the acute toxicity test of the extract using the BSLT method showed that there was anticancer activity with the acquisition of LC50 of 1000 ppm, which was 697.99 ppm.
Poly Aluminum Chloride (PAC) as Coagulant in Liquid Waste Treatment of Tofu Riva Ismawati; Rina Rahayu; Rizqa Puspitarini; Ahmad Muhlisin; Alene Tawang
Walisongo Journal of Chemistry Vol 5, No 1 (2022): 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.v5i1.9417

Abstract

The tofu craftsmen have not processed the liquid waste produced and disposed of the liquid waste directly into the waters as a result, the water quality has decreased. Tofu liquid waste has BOD (Biological Oxygen Demand), COD (Chemical Oxygen Demand), and TSS (Total Suspended Solid) exceeding the permitted quality standards. Treatment of tofu liquid waste needs to be done before being disposed of, one of which is by using coagulant. The purpose of this research is to know the value of BOD, COD, TSS, and pH of tofu liquid waste before and after the addition of PAC. The study was conducted by varying the concentration of PAC (10 mg/L, 30 mg/L, and 75 mg/L). The test results show that the tofu liquid waste has a BOD value of 3,890 mg/L, COD 9558.7 mg/L, TSS 2,905 mg/L, and a pH of 3.7. The use of PAC as a coagulant reduced the values of BOD, COD, TSS, and pH. PAC concentration of 75 mg/L can reduce BOD, COD, TSS, and pH values to 3,015 mg/L, 6,900 mg/L, 840 mg/L, and 3.59, respectively.

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