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Daniel Daniel
Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Mulawarman
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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 1 
SYNTHESIS OF SULPHONATED MESOPOROUS SILICA FROM RICE HUSK ASH (Oryza sativa L.) Ajeng Chandra Maylina; R.R. Dirgarini Julia Nurlianti Subagyono; Daniel Daniel
JURNAL ATOMIK Vol 3 No 2 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

A study on the synthesis of sulphonated mesoporous silica from rice husk ash (Oryza sativa L.) been conducted. The preparation of sulphonated MSU-H was conducted by several steps namely, extraction of silica from rice husk ash, synthesis of mesoporous silica, synthesis of sulphonated mesoporous silica with post-grafting method. The N2 adsorption-desorption characterization results show the surface area of mesoporous silica 134 m2/g, pore volume 0.81 cm3/g and pore size 24.13 nm. The FT-IR characterization results of sulphonated mesoporous silica indicate the presence of Si-O-Si, Si-O, O-H and C-H alkane clusters.
ISOLATION AND CHARACTERIZATION OF FLAVONOID COMPOUNDS FROM ETHYL ACETATE FRACTION OF Macaranga hosei LEAVES Frenki Alan Nuari; Eva Marliana; Daniel Daniel
JURNAL ATOMIK Vol 4 No 1 (2019)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Isolation and characterization of flavonoid compounds in the third fraction of ethyl acetate of Macaranga hosei leaves. The separation process in the third fraction of ethyl acetate was perfomed using gravity column chromatography with gradient elution method. The obtained isolate was tested for its purity using thin layer chromatography with various eluents named n-hexane, chloroform, acetone, ethyl acetate and methanol with Rf values 0; 0,17; 0,86; 0,97 and 0,81 respectively. The isolate was characterized as MH-1 phenolic compound as much as 30 mg in the form of oil. Analysis of MH-1 compound with UV showed 2 peaks at ? 295 nm (band II) and 340 nm (band I). Analysis of MH-1 compounds with FT-IR showed OH functional groups, aliphatic C-H, aromatic C-H, C=O, aromatic C=C, C-O-C and C-OH. Based on the results of the UV and FT-IR spectra, the MH-1 compound is assumed to be of flavonoids.
ISOLATION AND CHARACTERIZATION OF FLAVONOID COMPOUNDS FROM ETHYL ACETATE FRACTION OF Macaranga lamellata Whitmore LEAVES Sherly Indah Puspita; Eva Marliana; Daniel Daniel
JURNAL ATOMIK Vol 4 No 1 (2019)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Isolation and characterization of flavonoid compounds from ethyl acetate fraction of Macaranga lamellata Whitmore leaves have been done in this research. Macaranga lamellata Whitmore leaves was macerated using methanol and fractionated with n-hexane and ethyl acetate. The separation process of ethyl acetate fraction was conducted using gravity column chromatography by Step Gradient Polarity (SGP) method. The isolate was tested for its purity using thin layer chromatography with various eluents i.e. n-hexane, chloroform, methanol, acetone and ethyl acetate, with Rf values were 0; 0,7857; 0,8333; 0,9048 and 0,9286 respectively. The result indicated that the isolate was obtained as ML1 (3 mg) belong to flavonoid compound in the form of oil. Analysis of ML1 compound using UV displayed 2 peaks at ? 291 nm (band II) and 342 nm (band I). Analysis of ML1 compound using FT-IR displayed functional groups -OH, C-H aromatic, C-H aliphatic, C=C aromatic, C=O, C-OH and C-O-C. Based on the results of UV and FT-IR spectra, ML1 compound was suspected to contain flavonoid compound.
PHYTOCHEMICAL TEST, TOXICITY TESTS AND ANTIOXIDANT ACTIVITIES OF MAHOGANY SEEDS (Swietenia mahagoni (L) Jacq) Novi Rindawati; Daniel Daniel; Chairul Saleh
JURNAL ATOMIK Vol 4 No 2 (2019)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Phytochemical tests, toxicity tests and antioxidant activities of mahogany seeds (Swietenia mahagoni (L) Jacq) were carried out. This study is meant to identify the secondary metabolism, the LC50 and LC50 of extract of ethanol, n-hexane fraction, and ethyl acetate fraction with the seeds of (Swietenia mahagoni (L) Jacq). Phytochemical screening on ethanol extract of mahogany seeds showed the presence of alkaloids, flavonoids, triterpenoids and phenolic n-Hexane fraction contains alkaloids compounds, triterpenoid and phenolic compounds. Ethyl acetate fraction contains flavonoids, triterpenoids and phenolic compounds. The toxicity level is performed by tests of BSLT (Brine shrimp lethality test), while antioxidant activity is performed by a spectrofotometr uv-vis. The total extract of ethanol is obtained at the smallest amount of LC50 for 49.47565 ppm, n-Hexane fractions obtained from LC50 as much 75.30347 ppm, ethyl acetate fraction obtained from LC50 as much as 77.87461 ppm and those three extracts are toxic. The IC50 value of a total ethanol of 176 ppm, n-Hexane fraction of as 189 ppm and ethyl acetate fraction of 144 ppm with is strength medium antioxidant.
PENENTUAN DERAJAT ASILASI (DA) DENGAN METODE BASE LINE DARI SINTESIS N-ALDIMIN KITOSAN Yolanda V. A Soma; Daniel Daniel; Chairul Saleh
JURNAL ATOMIK Vol 3 No 1 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Determination Degree of Acylation (DA) with the baseline method from the synthesis of N-Aldimin Chitosan was obtained from the acylation reaction between chitosan and acetaldehyde. The formation of N-Aldimin Chitosan is supported by the data of FT-IR spectroscopy in the wave number 3441.01 cm-1 shows the stretching vibration of OH of chitosan and absorption peaks in the area of wave number 1627.92 cm-1 and 1566.20 cm-1 is vibration C=N which identifies the formation aldimine chitosan. Wavenumber 2924.09 cm-1 shows the C-H stretching vibration as evidenced by a wave number 1404.16 cm-1 which is C-H bending and C-O absorption at wavenumber 1087.85 cm-1. Acylation degree (DA) obtained by 81.33%.
ISOLATION OF CHEMICAL ACTIVE COMPOUNDS ANTIOXIDANT FROM ETHYL ACETATE FRACTION OF BETEL LEAF FOREST (Piper aduncum L.) Alfrida Batan; Daniel Daniel; Partomuan Simanjuntak
JURNAL ATOMIK Vol 3 No 2 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research about the isolation of chemical active compounds antioxidants from ethyl acetate fraction of betel leaf forest (Piper aduncum L.) have been done. This research aimed to determine the type of secondary metabolites that contained in ethyl acetate fraction and the value of antioxidant activity as well as the structure that contained in ethyl acetate fraction. The test results of phytochemical showed that the secondary metabolites in ethanol extract are alkaloids, steroids and triterpenoids. The inhibitory concentration 50% (IC50) value that shown in the fraction Piper aduncum ethyl acetate-4-3 (PAEA-4-3) is 132.84 ppm. Fraction of PAEA-4-3 that have high levels of antioxidant activity was analyzed using a spectrophotometer Ultra Violet-Visible (UV-Vis), Infrared Fourier-Transform (FTIR) and Nuclear Magnetic Resonance (NMR) proton and carbon. The result analysis of PAEA-4-3 isolates showed the compound as 2,3-dimethoxy-metilanaoksi-benzene.
UJI TOKSISITAS DAN SIFAT ALELOPATI EKSTRAK ALANG-ALANG (Imperata cylindrica) TERHADAP PERKECAMBAHAN BIJI PADI (Oryza sativa) Triani Kurniati; Daniel Daniel; Sudrajat Sudrajat
JURNAL ATOMIK Vol 3 No 1 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Penelitian inibertujuan untuk mengetahui toksisitas dan sifat alelopati ekstrak alang-alang (Imperata cylindrica) terhadap perkecambahan biji padi (Oriza sativa). Sampel kering akar alang-alang dari Kutai Lama dimaserasi menggunakan pelarut etanol dan di fraksinasi menggunakan pelarut n-heksana dan etil asetat. Sampel kemudian di Skrining fitokimia dan uji toksistas dengan metode (Brini Shrimp Lethality Test) BSLT. Fraksi yang menunjukkan nilai LC50 paling rendah kemudian diuji sifat alelopati dan dianalisis dengan GC-MS. Hasil uji skrining fitokimia menunjukkan adanya kandungan alkaloid, triterpenoid dan fenol. Hasil uji toksisitas dengan metode (Brini Shrimp Lethality Test) BSLT menunjukkan bahwa fraksi etanol memiliki toksisitas tertinggi pada larva udang dengan nilai LC50 sebesar 647,5364 ppm. Uji senyawa alelopati dari ekstrak alang-alang dilakukan pada biji padi (Oriza sativa) memiliki pengaruh nyata terhadap perkecambahan biji padi. Analisa kandungan senyawa kimia pada fraksi etanol dari akar alang-alang menghasilkan dua puncak komponen senyawa pada spektra massa yang ditunjukkan dari hasil GC-MS yaitu fenol dan tetradecamethylcycloheptasiloxane. Kata kunci : Alang-alang (Imperata cylindrica), Fitokimia, Toksisitas dan Sifat Alelopati Terhadap Biji Padi
PHYTOCHEMICAL TEST ON METHANOL EXTRACT OF LEAF OF Macaranga hullettii King ex Hook.f. Rismawati Rismawati; Eva Marliana; Daniel Daniel
JURNAL ATOMIK Vol 3 No 2 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Phytochemical test of Macaranga hullettii King ex Hook.f have been done. This research aims to find out the secondary metabolites using Thin Layer Chromatography (TLC) from methanol extract on Macaranga hullettii leaf. Based on results of phytochemical screening, it is known that methanol extract contains alkaloid, steroid/triterpenoid, polifenol and flavonoid compounds.
Co-Authors Ajeng Chandra Maylina Alfrida Batan Chairul Saleh Chairul Saleh Eva Marliana Frenki Alan Nuari Novi Rindawati Partomuan Simanjuntak R.R. Dirgarini Julia Nurlianti Subagyono Rismawati Rismawati Sherly Indah Puspita Sudrajat Sudrajat Triani Kurniati Yolanda V. A Soma