Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

3.678

P-Index

This Author published in this journals

All Journal Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Ilmu dan Teknologi Kelautan Tropis MARINA CHIMICA ACTA Jurnal Kimia Khatulistiwa BERKALA SAINSTEK Al-Kimia ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Pure and Applied Chemistry CHEESA: Chemical Engineering Research Articles Molekul: Jurnal Ilmiah Kimia Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Hydrogen: Jurnal Kependidikan Kimia Jurnal Teknologi Kimia Unimal Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Jurnal Akademika Kimia al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Akademika Kimia

Ajuk Sapar

Department Of Chemistry, Tanjungpura University

Author-ID : 2734335

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Nursing Physics Social Sciences

Published : 38 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4

Colorimetric Detection of Hg(II) Ion Using Silver Nanoparticles Capped with 3-Hydroxybenzoic Acid Gusrizal Gusrizal; Andi Hairil Alimuddin; Ajuk Sapar; Rizki Noviani Ridwan; Sri Juari Santosa
Molekul Vol 14, No 1 (2019)
Publisher : Universitas Jenderal Soedirman

In this paper, we report for the first time thesimple method for detection of Hg(II) ion in anaqueousmedium using silver nanoparticles capped with 3-hydroxybenzoic acid. Silver nanoparticles capped with 3-hydroxybenzoic acid were preparedby reduction of the silver ion with 3-hydroxybenzoic acid and without surface functionalization. The formation of silver nanoparticles was characterized by a UV-Visible spectrophotometer. The yellowcolloid of prepared silver nanoparticles capped with 3-hydroxybenzoic acid showed a surface plasmon resonance peak at 420 nm. The ability of silver nanoparticles capped with 3-hydroxybenzoic acid in detection was tested by doing a reaction with several metal ions individually(Na(I), K(I), Cu(II), Zn(II), Ca(II), Mg(II), Hg(II), Mn(II), Ni(II), Pb(II), and Co(II)). It was foundthat silver nanoparticles capped with 3-hydroxybenzoic acid highly selective toHg(II) and then the prepared silver nanoparticles were developedfor detection of Hg(II) ion. Addition of 1 mL Hg(II) ion into 4mL the as-preparedsilver nanoparticles reducedthe peak of surface plasmon resonance spectra, andthe reduction of peak intensity was proportional to the concentration of Hg(II) ion. A goodlinear relationship (R2= 0.998) between absorbance at 420 nm and concentrationof Hg(II) over the range 1.0x10-3to 5.5x10-3M was obtained. Silver nanoparticles capped with 3-hydroxybenzoic acid were highly sensitive to Hg (II) ion with the detection limit down to 4.7x10-5M. Application the method to the real water sample showed the excellentresult with recovery ranged from 98 to 101%. The proposed method was found to be useful forthe colorimetric detection of Hg(II) ion in an aqueousmedium.

Study of Conformational Preferences of Erythro-Carolignan E Assessed By The Coupling Between H7'-H8' in Different NMR Solvents Rudiyansyah Rudiyansyah; Ajuk Sapar; Masriani Masriani
ALCHEMY Jurnal Penelitian Kimia Vol 11, No 1 (2015): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.11.1.99.1-7

Erythro-carolignan E (1) has been obtained from the ethanol extract of the wood bark of Durio affinis Becc. This research was conducted in order to prove that conformational preferences of compound 1 were solvent dependent. On the basis of 1H-NMR data, the relative configuration of compound 1 was characterized by a coupling constant (3JHH) value of 3.3 Hz at H-7' in CDCl3. The coupling constant (3JHH) values of H-7' in compound 1 has changed to 4.1 Hz and 5.3 Hz in pyridine-d5 and acetonitrile-d3 respectively. As a result, the conformation of compound 1 at C7'-C8' has changed in different NMR solvents. In conclusion, structure oferythro-carolignan E that contains a dihydroxy group at C7'-C8' is able to change in different NMR solvent.

SINTESIS TIO2-KAOLIN DAN UJI AKTIVITAS FOTOKATALISIS UNTUK ANTIBAKTERI Escherichia Coli DAN Staphylococcus aureus Desi Listiani; Ajuk Sapar; Anthoni Batahan Aritonang
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Synthesis of TiO2-kaolinite has been performed using solgel method with titanium tetraisopropoxide (TTIP) as precursor. Synthesis of TiO2-kaolinite by temperature calcination 450 °C for 2 hours to obtain TiO2-kaolinite anatase and then the antibacterial photocatalysis activity of E. coli and S. aureus was performed. Identification of the characteristics TiO2-kaolinite used XRD, SEM, FTIR, and DR-UV. It was found that TiO2-kaolinite has been anatase phase structure with the particle size is 19-103 nm, and have a spheric morphology. Infrared spectra indicate a specific group in wave number 921 cm-1. The antibacterial photocatalysis activity test was performed in liquid media and measurements by the Optical Density (OD) is using Spectrophotometer UV-Vis at wavelength of 600 nm. The results photocatalysisis activity of TiO2-kaolinite for E.coli, TiO2-kaolinite can kill bacteria occured in the 60th minute, while for S. aureus TiO2-kaolin can kill bacteria occured in the 100th minute. Our results clearly that the TiO2-kaolinite has potential as an antibacterial material in water sterilization.

KARAKTERISASI SENYAWA FENOLIK DARI BIJI BUAH RAMBUTAN (Nephelium lappaceum L.) Eka Pebri Malinda; Rudiyansyah Rudiyansyah; Ajuk Sapar
Indonesian Journal of Pure and Applied Chemistry Vol 2, No 3 (2019)
Publisher : Tanjungpura University

Rambutan seeds are one of the waste produced from rambutan that is potential to be used in the food and pharmaceutical fields because it is rich in nutrients and secondary metabolites. This research was carried out to characterize phenolic compounds from the ethyl acetate fraction by using chromatographic methods, phytochemical tests, and 1H-NMR analysis. The isolate was obtained as white powder with 6.2 mg and gave positive sign for phenolic by phytochemical test. 1H-NMR spectrum data (CD3OD, 500 MHz) showed the chemical shift characteristic of coumarin compounds at δH (ppm): 7.82 (1H, d, J= 8.3 Hz), 7.39 (1H, d, J= 7.55 Hz), 6.73 (1H, d, J= 8.05 Hz), and 5.61 (1H, d, J= 7.55 Hz), an anomeric proton at δH 4.8-5 ppm, the characteristics of the methyl group of L-rhamnose sugar at δH 1.29 ppm and other sugar protons at δH 3-4 ppm. Based on the 1H-NMR analysis and comparison with literature, a phenolic compound obtained from rambutan (Nephelium lappaceum L.) seeds is 7-O-β-L-rhamnose-8-hydroxycoumarin or 8-O-β-L-rhamnose-7-hydroxycoumarin.

UJI TOKSISITAS DAN PROFIL FTIR EKSTRAK METANOL SPONS Niphates olemda ASAL PULAU SAMALONA KEPULAUAN SPERMONDE (TOXICITY AND FTIR PROFILE OF SPONS METHANOL EXTRACT OF Niphates olemda FROM SAMALONA ISLANDS OF SPERMONDE ARCHIPELAGO) Ajuk Sapar; Alfian Noor; Nunuk Hariani Soekamto; Ahyar Ahmad
Indonesian Journal of Pure and Applied Chemistry Vol 3, No 2 (2020)
Publisher : Tanjungpura University

Preliminary research including toxicity testing, phytochemical test, and FTIR analysis of methanol extracts from sponge species Niphates olemda has been carried out. Small scale extraction was carried out on 23 g of the wet sponge sample using methanol and obtained as much as 40.3 mg of methanol extract. The results of the toxicity test using the BSLT method using Artemia salina showed that the Niphates olemda extract was toxic with LC50 value of 87.5 ppm.The phytochemical test results show that the methanol extract contains steroids and terpenoids. FTIR profile of methanol extract Niphates olemda indicated the presence of the main functional groups, namely C=O, OH, C=C, =CH, CH2, CH3, and C-O

Identifikasi Komponen Senyawa Organik dan Uji Aktivitas Antiinflamasi dari Fraksi Etil Asetat Daun Cabai Rawit (Capsicum frutescens L.) Uci Pradina; Ajuk Sapar; Warsidah Warsidah; Endah Sayekti; Anthoni Batahan Aritonang
Al-Kimia Vol 10 No 1 (2022): JUNI
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v10i1.20456

Cayenne pepper was known to treat swelling of tissue cells and is thought to have anti-inflammatory activity. The aim study is to examine the anti-inflammatory activity of the ethyl acetate fraction of cayenne pepper and identify the components of organic compounds in the ethyl acetate fraction. The stages of this research include preparation, extraction, partitioning, phytochemical tests, anti-inflammatory activity tests using Human Red Blood Cells (HRBC), and identifying the components of organic compounds they contain. Among the three fractions obtained at the extraction stage, the ethyl acetate fraction had the best activity as an anti-inflammatory at a concentration of 1000 mg/L of 57.77%. The fractionation of the ethyl acetate fraction was carried out using Vaccum Liquid Chromatography (VLC), and four combined fractions were obtained. One of the combined fractions, code EA-4-5, with a weight of 0.188 grams, was analyzed using GC-MS and FTIR. The two main compounds obtained from the GC-MS analysis were dodecanoic acid (25.79%) and (-)-Loliolide (12.86%). The results of the FTIR interpretation of the EA-4-5 fraction showed absorption at a wave number of 3234.62 cm-1 (stretching vibration of the -OH functional group), 3088.03 cm-1 and 3028.24 cm-1 (stretching vibration of the functional group =CH), 2931.8 cm-1 and 2858.51 cm-1 (functional group strain vibration –CH), 1712.79 cm-1 (functional group strain vibration –C=O), and 1606.7 cm-1 (strain vibration functional group –C=C).

IDENTIFIKASI KOMPONEN UTAMA MINYAK ATSIRI DAUN UJUNG ATAP (Baeckea frutescens L.) DAN UJI AKTIVITAS ANTIBAKTERI TERHADAP BAKTERI Escherichia coli IDENTIFICATION OF MAIN COMPONENTS OF LEAF TIP ESSENTIAL OIL (Baeckea frutescens L.) AND ANTIBACTERIAL ACTIVITY TEST AGAINST Escherichia coli BACTERIA Eka Wahyuni; M Agus Wibowo; Ajuk Sapar
Indonesian Journal of Pure and Applied Chemistry Vol 5, No 2 (2022)
Publisher : Tanjungpura University

Baeckea frutescens L is a tropical plant that usually grows in coastal areas. Its leaves resemble needles with trees that resemble large pines. Baeckea frutescens L can be found in various regions in Indonesia, one of which is in Nanjung Village, Ketapang Regency, and West Kalimantan. Baeckea frutescens L essential oil was obtained by isolation using steam distillation. The results obtained from the isolation of the essential oil of Baeckea frutescens L was a yield of 0.0037% (v/v) and a density of 0.874 g/mL. Baeckea frutescens L essential oil was then analyzed using GC-MS. The results of the analysis showed that there were 32 compounds, with the main compounds being -ocimene, eucalyptol, -myrcene, -humulene, -terpineol. The results of the antibacterial activity test against Escherichia coli bacteria, concentrations of 5% (15.9 mm), 2.5% (15.6 mm), 1.25% (12.9 mm) and 0.625% (11.8 mm).

KARAKTERISASI METABOLIT SEKUNDER DARI DAUN MANGROVE Rhizopora stylosa SEBAGAI ANTIOKSIDAN (CHARACTERIZATION OF SECONDARY METABOLITE MANGROVE LEAVES Rhizopora stylosa SPECIES AS ANTIOXIDANTS) Septian Triadi Syahputra; Ajuk Sapar; Ari Widiyantoro
Indonesian Journal of Pure and Applied Chemistry Vol 5, No 1 (2022)
Publisher : Tanjungpura University

Mangrove leaves or also known as “bakau” by the people of Mempawah Regency, which has (Rhizopora stylose) species containing alkaloids, flavonoids, steroids, terpenoids, phenolics, and saponins that can be used as antioxidant compounds. This study was aimed to determine the antioxidant activity of extracts and secondary metabolite fractions, and also to determine the characteristics of isolate compounds from mangrove leaves (Rhizopora stylose). Maceration of 1.57 kg of dry powder of mangrove leaves (Rhizopora stylose) with methanol as a solvent obtained a crude extract of 141.13 g of methanol with a percent yield of 8.98%. Partitioning the crude methanol extract obtained the n-hexane, dichloromethane, ethylacetate, and residue fractions by weight and percent yield, respectively, namely 6.95 g (0.44%), 26.74 g (1.70%), 26 .66 (1.69%), and 25.75 g (1.64%). The results of the antioxidant activity test showed that the dichloromethane fraction had a better antioxidant activity with an IC50 value of 121.314 g/mL. Separation and purification of the dichloromethane fraction to obtain isolates were carried out by column chromatography in order to obtain pure isolates which were characterized by the appearance of a single spot on the tested plate with various eluents, namely, isolate F7. The 1H-NMR data for isolate F7 showed chemical shifts for aromatic protons of 8.52 ppm, 7.70 ppm, 7.67 ppm, protons for tertiary C of 5.41 ppm, and protons for methyl and methylene of 3.50 ppm, 3.47 ppm, 1.59 ppm, 1.23 ppm, 1.05 ppm, and 0.84 ppm. H-NMR data showed that isolate F7 had similarities with the chemical shift of p-Oxy-2-Ethylhexyl benzaldehyde, namely 7.71 ppm, 7.54 ppm, 4.22 ppm, 1.68 ppm, 1.35 ppm, 1.32 ppm, 1.30 ppm, 0.90 ppm but different in the alkoxy substituent position from isolate F7 which was in the meta position

AKTIVITAS ANTIOKSIDAN DAN KARAKTERISASI ISOLAT DARI FRAKSI n-HEKSANA PADA RUMPUT LAUT (Caulerpa sertularioides) ASAL SINGKAWANG KALIMANTAN BARAT (ANTIOXIDANT ACTIVITY AND ISOLATE CHARACTERIZATION OF n-HEXANE FRACTION IN SEAWEED (Caulerpa sertularioides) FROM SINGKAWANG WEST KALIMANTAN) Fitriani Fitriani; Endah Sayekti; Ajuk Sapar
Indonesian Journal of Pure and Applied Chemistry Vol 5, No 1 (2022)
Publisher : Tanjungpura University

Seaweed (Caulerpa sertularioides) is one of the marine plants of West Kalimantan, which contains bioactive compounds that can act as antioxidants. The purpose of this study was to determine antioxidant activity and identify components of organic compounds in seaweed C. sertularioides. This research was carried out in several stages, namely extraction, fractionation, antioxidant test (DPPH), vacuum liquid chromatography (KVC), gravity column chromatography (KKG), and two-dimensional thin-layer chromatography (2-Dimensional TLC), and characterization. Antioxidant activity test by DPPH method on methanol extract, n-hexane fraction, and fraction DCM from seaweed C. sertularioides obtained IC50 values of 82.21 g/mL (strong antioxidant), 131.2 g/mL (medium antioxidant), and 192.43 g/mL (weak antioxidant). The results of the FT-IR identification of isolate I4 showed a strong absorption at 3483-3387 cm-1,which was specific for the OH group. The presence of strong absorption of 2926-2854cm-1 C-H stretching group, a wide absorption of 1338 cm-1 of methyl and methylene groups (stretching). There was a strong absorption of 1543-1463 cm-1 C-O ester group (bend), a broad absorption of 1074 cm-1 C-O (stretching), and absorption of 1795-1735 cm-1 specific for the C=O ester group. The results of GC-MS on isolate I4 indicated the main component was compound 1-nonadecene (14.09%), Trifluoroacetoxy hexadecane based on the literature, the compound included the organic component of fatty acids, and esters

Synthesis and Characterisation of B-CDs/TiO2 Composite Anthoni B. Aritonang; Ajuk Sapar; Uswatun Hasanah; Adhitiyawarman Adhitiyawarman; Puji Ardiningsih
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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

Synthesis of composite boron-doped carbon nanodots (B-CDs)/TiO2 using the sol-gel method performed with titanium tetraisopropoxide (TTIP) precursor and B-CDs prepared by the microwave method using citric acid monohydrate, urea, and boric acid as precursors. The optimum concentration of boron dopant (B) on B-CDs/TiO2 is 0.5% boron (w/w) which is then used as a composite on TiO2 resulting in a brown solid and has blue luminescent under UV light. The result with UV-Vis/DRS for variation in B-CDs concentration of 0.5%, 1.25%, and 2.5% showed Eg values of 2.34 eV, 2.00 eV, and 2.29 eV. B-CDs cause the maximum emission peak (λEm) to redshift and affect the intensity of photoluminescence TiO2. The characterization of FT-IR does not indicate a new peak, there is no bonding in the B-CDs/TiO2 composite. The TiO2 diffractogram was observed to shift towards a larger 2θ which caused the crystallinity of TiO2 to decrease. Based on the photocatalytic activity test on the degradation of methylene blue solution, it showed fairly good activity. It is expected that the B-CDs/TiO2 composite has the potential to be applied as a photocatalyst to degrade organic pollutants under visible light illumination.

Co-Authors . Daryati . Kadarisno Abrori, Sayyidus Dzaki Adhitiyawarman, Adhitiyawarman Ahyar Ahmad Ahyar Ahmad Alfian Noor Alfian Noor Alfian Noor Alfian Noor Alimunddin, Andi Hairil Andi Hairil Alimuddin Andi Hairil Alimuddin Anis Shofiyani Anita Anita Anthoni B. Aritonang Ari Widiyantoro Aritonang, Anthoni Batahan Asma, Al Desi Listiani Eka Pebri Malinda Eka Wahyuni Endah Sayekti Erlina Erlina Erlina Ersando, Ersando Fitriani Fitriani Fredryk Welliam Mandey Guntur Guntur Gusrizal Gusrizal Hafiludin Uli Hamzi Anwari Hariyanti, Weni Harlia Harlia Harlia, Harlia Khofifah Aditha Parawansa Lestari, Titiek M Agus Wibowo Masriani . Millenia Millenia Millenia, Millenia Nelly Wahyuni Nunuk Hariani Soekamto Parawansa, Khofifah Aditha Prayitno, Dwi Imam Puji Ardiningsih Puji Ardiningsih Rahayu, Warsi Kurnia Risa Nofiani Risa Nofiani Risya Sasri Rizki Noviani Ridwan Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Sari, Heni Puspita Sasri, Risya Septian Triadi Syahputra Siti Nurbetty Sri Juari Santosa Sri Wahyuni Sulistyo, Luthfi Imam Thamrin Usman Titin Anita Zahara, Titin Anita Titin Anita Zaharah Tri Aryono Hadi Tri Aryono Hadi Uci Pradina Uswatun Hasanah Wardani, Fina Rika Warsidah Warsidah Wibowo, M. Agus Wibowo, Muhamad Agus Widiyananta, Surya Winda Rahmalia Winda Rahmalia Zaharah, Titin Anita

Title

Found 38 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 38 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 38 Documents
Search