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All Journal Jurnal Teknologi Dan Industri Pangan KOVALEN: Jurnal Riset Kimia Hydrogen: Jurnal Kependidikan Kimia Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian
Atep Dian Supardan
Program Studi Analisis Kimia, Sekolah Vokasi Institut Pertanian Bogor, Jl. Kumbang No 14 Bogor 16151
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Industrial & Manufacturing Engineering Social Sciences Veterinary

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SINTESIS PATI JAGUNG TERFOSFORILASI MELALUI TEKNIK GELOMBANG MIKRO [Microwave-Assisted Synthesis of Phosphorylated Corn Starch] Atep Dian Supardan; Suminar Setiati Achmadi; Tun Tedja Irawadi
Jurnal Teknologi dan Industri Pangan Vol. 25 No. 1 (2014): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (597.454 KB) | DOI: 10.6066/jtip.2014.25.1.1

Abstract

SINTESIS PATI JAGUNG TERFOSFORILASI MELALUI TEKNIK GELOMBANG MIKRO [Microwave-Assisted Synthesis of Phosphorylated Corn Starch] Atep Dian Supardan*, Suminar Setiati Achmadi dan Tun Tedja Irawadi Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Bogor Diterima 28 Maret 2013 / Disetujui 24 Februari 2014ABSTRACT Phosphorylated starch is a type of modified starches which is mostly imported. Commonly, starch to be modified must contain more than 25% of amylose. This study aimed to synthesize phosphorylated starch and evaluate its potency as a heavy metal adsorbent. Corn starch was subjected to phosphorylation through microwave-assisted reaction with a mixture of sodium dihydrogen orthophosphate and disodium hydrogen phosphate. The experiment was designed to optimize the pH, microwave radiation power, and phosphorylation time. The results showed that the maximum phosphate subtitution degree was obtained at pH of 6, microwave radiation of 500 W, and a reaction time of 10 minutes. The degree of subtitution ranged from 0.567 to 0.787. The physicochemical properties of the product i.e. swelling capacity, solubility, water binding capacity, and paste clarity were significantly different than that of the unmodified corn starch. The infrared spectrum showed a high peak absorption at the wavelength of 1651 cm-1, indicating hydrogen bond formation of phosphoric group-water- phosphoric group. In the fingerprint area, there were two new absorption peaks at 1200 and 990 cm-1, which were assigned for the P=O and C-O-P vibrations, respectively. The phosphorylated corn starch adsorbed methylene blue up to 73.3% and mercury up to 73.6%, suggesting the prospect of the microwave-assisted synthetic phosphorylated corn starch as an effective adsorbent for heavy metals.   
UJI TOKSISITAS HASIL FRAKSINASI KOLOM KROMATOGRAFI EKSTRAK METANOL BUAH MAHKOTA DEWA (Phaleria macrocarpa (Scheff.) Boerl): Result of Toxicity Test Chromatography Column Fracination of Methanol Extract Fruit Mahkota Dewa (Phaleria macrocarpa (Scheff.) Boerl) Atep Dian Supardan
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 12 No. 1 (2022): Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian, Volume 1
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jstsv.12.1.32-42

Abstract

Fruit of mahkota dewa (Phaleria macrocarpa (Scheff.) Boerl) is one of the herbal medicines used against cancer in society. The aim of the research was to investigate the toxic effect of metanol extract mahkota dewa fruit fractionation against Artemia salina Leach, as the primary step test to identify an anticancer activity. Metanol extract from mahkota dewa fruit content 9.51% which secondary metabolit compound were alkaloid, flavonoid, steroid, saponin, and tanin. The result showed the output metanol extract fractionation from mahkota dewa fruit produced 3 fraction which were F1, F2, and F3 and the LC50 were 761, 53, and 91 ppm. The fractions were separated by using preparative thin layer chromathography. Fraction 1 and 2 produced 7 spots, while fraction 2 produced 6 spots. The most active fraction was F17 (LC50 = 325 ppm) from F1. The identification of ultra violet and infra red Spectrophotometer showed spectrum of F1, F2, and F3 BMKD have nitrogen atom in their molecul and suggested that F1, F2, and F3 BMKD contained alkaloids. ABSTRAKPada penelitian ini dilakukan uji toksisitas hasil fraksinasi kolom kromatografi ekstrak metanol buah mahkota dewa (Phaleria macrocarpa (Scheff.) Boerl) terhadap larva udang Artemia salina Leach sebagai uji pendahuluan terhadap anti kanker. Ekstrak metanol buah mahkota dewa memiliki rendemen sebesar 9.51% dengan kandungan senyawa metabolit sekunder antara lain alkaloid, flavonoid, steroid, saponin, dan tanin. Hasil fraksinasi ekstrak metanol dengan kromatografi kolom menghasilkan 3 fraksi dengan nilai LC50 masing-masing 761, 53, dan 91 ppm. Ke-3 Fraksi tersebut kemudian dipisahkan lagi menggunakan kromatografi lapis tipis preparatif, menghasilkan 7 spot pada fraksi 1 dan 3 sedangkan fraksi 2 menghasilkan 6 spot. Hasil pemurnian menggunakan KLTP menunjukkan toksisitas yang lebih rendah dibandingkan dengan fraksi kasarnya yaitu yang berasal dari fraksi 1 (F1) yaitu F17 (LC50 = 325 ppm). Identifikasi spektrofotometer ultra violet dan infra merah menunjukan bahwa F1, F2, dan F3 BMKD diduga memiliki gugus fungsi amina yang merupakan ciri khas dari alkaloid.
Evaluasi Kadar Senyawa Fenolat, Flavonoid Total, serta Aktivitas Antioksidan Secara in vitro dalam Ekstrak Metanol Bawang Dayak (Eleutherine palmifolia (L.) Merr : Evaluation of Phenolic Compounds, Total Flavonoid Content and in vitro Antioxidant Activity of Methanol Extract of Dayak Onion Bulbs (Eleutherine palmifolia (L.) Merr Farida Laila; Ika Resmeliana; Wina Yulianti; Atep Dian Supardan
KOVALEN: Jurnal Riset Kimia Vol. 8 No. 3 (2022): December Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2022.v8.i3.16175

Abstract

Dayak onion bulbs are a plant originating from Kalimantan which has been used for generations to treat various diseases. This plant is quite easy to grow and develop in many places in Indonesia. The aims of the present study were to evaluate the antioxidant potential of the methanol extract of Dayak onion bulbs based on the total of the phenolic and flavonoids contents and also the antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging ability, ferric reducing power and total antioxidant capacity. The results showed the total phenolic and flavonoid methanol extract of Dayak onion bulbs were 14.49 ± 1.42 mg GAE/g dry weight and 5.41 ± 1.01 mg QE/g dry weight, respectively. Antioxidant activity as measured by the DPPH, total antioxidant capacity, and ferric reduction assay with IC50 values of 16.95 ± 1.58 μg/mL, 24.22 ± 2.51 µg/mL, and 85.40 ± 16.88 µg/mL, respectively. These results suggest that the methanol extract of Dayak onion bulbs has potential bioactive compounds with good antioxidant activity and can be developed as an effective and safe source of natural compounds for functional food or herbal medicine.
PENGARUH JUMLAH STANDAR DAN NILAI KONSENTRASI STANDAR LOGAM TERHADAP INTERFERENSI DAN LINEARITAS KURVA STANDAR PENGUKURAN KADAR LOGAM MENGGUNAKAN INDUCTIVELY COUPLED PLASMA-OPTICAL EMISSION SPECTROSCOPY: Effect of Standard Amount and Metal Standard Concentration Values on Interference and Linearity of Standard Curve of Metal Level Measurement Using Inductively Mounted Plasma-Optical Emission Spectroscopy Atep Dian Supardan
Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian Vol. 13 No. 1 (2023): Jurnal Sains Terapan : Wahana Informasi dan Alih Teknologi Pertanian
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jstsv.13.1.67-76

Abstract

Analysis of metal levels using ICP-OES can be done using many metal standards in one measurement. However, during the measurement, disturbances often occur such as the use of nitric acid as a metal solvent and the interference of adjacent emission wavelengths. In this study, background values were measured due to the use of 2% and 5% nitric acid, calibration curve measurements, and measurement linearity due to the use of the number of metals that can be analyzed in one measurement (13 and 23 metal standards) and metal standard concentration values (2, 3 and 7 metal standard concentration values). Based on the research, 2% nitric acid produces a lower background value than 5% nitric acid so it is good to be used as a solvent for metal standards. The mixture of metal standards with 3 concentration values, namely 50, 100 and 150ppb with 13 different metal standards, produces a linearity value that meets the rules of standard curve measurement, namely > 0.999. ABSTRAK Analisis kadar logam menggunakan ICP-OES dapat dilakukan mengunakan banyak standar logam dalam satu kali pengukuran. Namun pada saat pengukurannya sering kali terjadi gangguan akibat penggunaan asam nitrat sebagai pelarut logam dan interferensi panjang gelombang emisi yang berdekatan pada saat pengkuran. Pada penelitian ini dilakukan pengukuran nilai background akibat penggunaan asam nitrat 2% dan 5%, pengukuran kurva kalibrasi dan linearitas pengukuran akibat penggunaan jumlah logam yang dapat dianalisis dalam satu kali pengukuran (13 dan 23 standar logam) dan nilai konsentrasi standar logam (2, 3 dan 7 nilai konsentrasi standar logam). Berdasarkan penelitian diperoleh bahwa asam nitrat 2% menghasilkan nilai background yang lebih rendah dibandingkan asam nitrat 5% sehingga baik digunakan sebagai pelarut standar logam. Campuran standar logam dengan 3 nilai konsentrasi yaitu 50, 100 dan 150ppb dengan 13 buah standar logam yang berbeda, menghasilkan nilai linearitas yang memenuhi kaidah pengukuran kurva standar yaitu > 0.999.
Eco-Friendly Ultrasound-Assisted Synthesis of Silver Nanoparticles Mediated by Tea Leaf Extracts and Their Potential Applications Muliawati, Nindya Tri; Fajar, Malik; Sholeha, Novia Amalia; Ramdhan, Mohamad Alief; Laila, Farida; Sujarnoko, Tekad Urip Pambudi; Yulianti, Wina; Supardan, Atep Dian; Listiasari, Faranita Ratih; Resmeiliana, Ika
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 5 (2025): October 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i5.18213

Abstract

The green synthesis of silver nanoparticles (AgNP) presents notable benefits, such as environmental sustainability, simplicity, cost-effectiveness, and scalability for industrial applications. This study utilized green tea leaves (Camellia sinensis), which are abundant in catechins and polyphenols, as natural reducing and stabilizing agents. Ultrasonic-assisted synthesis was utilized to improve extraction and reduction processes, as acoustic cavitation induced by ultrasonic waves facilitates efficient mass transfer, accelerates nucleation, and enhances nanoparticle dispersion. This method provides an environmentally sustainable and economically viable alternative to conventional AgNP synthesis, enhancing the sustainability of nanoparticle production. The successful synthesis of AgNP was evidenced by the distinct color change of the tea extract from green to brown, accompanied by the formation of a brown colloidal suspension, in accordance with the Surface Plasmon Resonance (SPR) phenomenon. The UV-Vis spectrophotometric analysis confirmed AgNP formation, evidenced by a characteristic absorption peak at approximately 430 nm. The synthesized AgNPs were utilized as a colorimetric sensor for Fe³⁺ ions in aqueous solutions, demonstrating distinct color changes and SPR band shifts upon interaction with the metal. This illustrates their capability as environmentally friendly nanomaterials for the swift and precise detection of heavy metals, aiding in sustainable environmental monitoring. This research integrates ultrasonic-assisted synthesis with green tea extract, presenting a viable approach for the large-scale, environmentally sustainable production of nanoparticles.
Co-Authors Fajar, Malik Farida Laila Ika Resmeliana Laila, Farida Listiasari, Faranita Ratih Muliawati, Nindya Tri Ramdhan, Mohamad Alief Resmeiliana, Ika Sholeha, Novia Amalia SUMINAR SETIATI ACHMADI Tekad Urip Pambudi Sujarnoko Tun Tedja Irawadi Wina Yulianti