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All Journal Jurnal MIPA CHEMISTRY PROGRESS Jurnal Matematika & Sains Bulletin of Chemical Reaction Engineering & Catalysis JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Journal of Research and Advances in Mathematics Education Indonesian Journal of Chemistry FIBONACCI: Jurnal Pendidikan Matematika dan Matematika Primatika : Jurnal Pendidikan Matematika Edumatica: Jurnal Pendidikan Matematika
Henry Aritonang
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Sam Ratulangi
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Mathematics Physics

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Pengaruh Triptofan pada Pertumbuhan dan Kandungan Katarantin dari Kalus Catharanthus roseus Dingse Pandiangan; Dennie Heroike Rompas; Henry Fonda Aritonang; Rizkita Rachmi Esyanti; Erly Marwan
Jurnal Matematika & Sains Vol 11, No 4 (2006)
Publisher : Institut Teknologi Bandung

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

Abstract

Research on the growth and catharanthine content of Catharanthus roseus callus which were treated with tryptophan had been done. Wet and dry weight of Catharanthus roseus callus decreased when treated with 100, 125 and 225 mg/L tryptophan, but callus treated with 150, 175 and 200 mg/L tryptophan grew better. Catharanthine contents of the kontrol callus was 423,22 µg/g dw. The treatment calli contains 485,00, 588,32, 875,10, 905,26, 784,10 and 950,54 µg/g dw of catharanthine respectively. The optimal tryptophan treatment for callus growth and catharanthine production was 175 mg/L tryptophan with a 113,90 %. increase of catharanthine content.
PERBANDINGAN KUALITAS KARBON AKTIF YANG DIBUAT DARI BATOK KELAPA HIBRIDA DAN BATOK KELAPA DALAM Tangkuman, Herling D.; Aritonang, Henry F.
CHEMISTRY PROGRESS Vol 2, No 1 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.1.2009.60

Abstract

This research was done to compare carbon quality made from hybrid coconut shell and deep coconut shell using direct process from coconut shell to be active carbon at 800- 1200oC temperature. The results shows that active carbon from deep coconut shell was better compared with hybrid coconut shell. Deep coconut shell has: ash content 2,1, water content 3,9, bonding carbon content 98, Iod absorbed ability 904, CTC 54, good galnular, consecutively and hard, whereas hybrid coconut shell has : ash content 12,4, water content 6,8, bonding carbon content 68, Iod absorbeb ability 482, CTC 28, desultory glanular and brittl
SINTESIS DAN KARAKTERISASI NANOPARTIKEL PLATINA (Pt) DARI LARUTAN KALIUM TETRAKLOROPLATINAT(II) (K2PtCl4) Rachman, Himas A. A.; Aritonang, Henry; Koleangan, Harry
CHEMISTRY PROGRESS Vol 10, No 2 (2017)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.10.2.2017.27746

Abstract

ABSTRAK  Penelitian ini bertujuan untuk menentukan ukuran dan jumlah nanopartikel platina (Pt) dengan mensintesis nanopartikel Pt dari larutan prekursor kalium tetrakloroplatinat(II) (K2PtCl4) dengan menggunakan matriks nata de coco dan reduktor natrium borohidrida (NaBH4). Nanopartikel Pt diperoleh dari variasi konsentrasi 10 mM dan 20 mM. Hasil penelitian dianalisis dengan menggunakan Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) dan Transmission Electron Microscopy (TEM). Berdasarkan analisis TEM, nanopartikel Pt dari prekursor K2PtCl4 memiliki ukuran rata-rata 1 nm dan jumlah kandungan nanopartikel Pt untuk masing-masing konsentrasi prekursor yaitu sebesar 59,16% dan 35,04%. Kata kunci: Sintesis, nanopartikel Pt, K2PtCl4, nata de coco     ABSTRACT The main purpose of this research was to determine the size and the number of content of platinum (Pt) nanoparticles by synthesizing Pt nanoparticles from the precursor solution of potassium tetrachloroplatinate (II) (K2PtCl4) using nata de coco matrix and reductor of sodium borohydride (NaBH4). The Pt nanoparticles were obtained from the variations of precursor concentration 10 mM dan 20 mM. The results were analyzed using Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) and Transmission Electron Microscopy (TEM). Based on TEM analysis, Pt nanoparticles from K2PtCl4 precursor have average size of 1 nm and the number of Pt nanoparticles content for each precursor concentration were 59.16% and 35.04%, respectively. Keywords: Synthesis, Pt nanoparticles, K2PtCl4, nata de coco
SINTESIS METIL ESTER ASAM LEMAK DARI MINYAK KELAPA HASIL PEMANASAN Rorong, Johnly; Aritonang, Henry F.; Ranti, Ferdinan P.
CHEMISTRY PROGRESS Vol 1, No 1 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.1.2008.20

Abstract

A research has been done to synthesis mixed fatty acid esther from coconut oil, before and after heating with variation time 1, 2 and 3 hours at ±175-180 ºC. The synthesis was done with transestherification method using acid as a cathalyst at 65 °C. The transestherification result was analyzed using gas chromatography to obtain its fatty acid composition. The mass of FAME obtained from methyl esther synthesized from coconut oil with heating time 0, 1, 2 and 3 hours are; 94.73 g, 93.57 g, 95.76 g dan 93.88 g respectively.
REAKSI ESTERIFIKASI GARAM ASAM LEMAK DENGAN ALKIL KLORIDA BERANTAI PANJANG MENGGUNAKAN TRIDODEKILAMIN HIDROKLORIDA SEBAGAI KATALIS PERPINDAHAN DUA FASA Aritonang, Henry F.; Tangkuman, Herling D.
CHEMISTRY PROGRESS Vol 2, No 1 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.1.2009.59

Abstract

Synthesis of didodekyl azelate produced by estherification reaction of disodium azelate salt with dodecylchloride used tridodecylamine hydrochloride as catalyst of two phase transfer was 34,123 gram (65,11%). Product of ester didodekyl azelate was identified by IR spectrometry which shows strong absorptionat 1700-1600 cm-1 indicating ester group C=O and 1H-NMR spectra showed that the number of protonsester was five lingkungan chemistry yang berbeda.
PENGARUH PENAMBAHAN ASAM SUKSINAT DALAM MENGHAMBAT KOROSI BAJA DALAM LARUTAN ASAM SULFAT Gusti, Diah Riski; Aritonang, Henry F.; Azis, Sriwati
CHEMISTRY PROGRESS Vol 1, No 1 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.1.2008.24

Abstract

The objectives of this research were study the effect of addition succinic acid on inhibiting of stainless steel corrosion in sulfuric acid solution. The stainless steel sample sieved and macerated in sulfuric acid solution with concentration of 0.01; 0.02; 0.03; 0.04 and 0.05 M for 24, 48 and 72 hours. The corrosion rate and inhibitor efficiency were evaluated with Asdim and Widharto method. The result showed that corrosion rate of with different concentration higher with increasing of concentration of sulfuric acid. The corrosion rate of stainless steel was higher of 0.3716 mg/cm2 hours at concentration of 0.05 M. However, the addition of succinic acid with different concentration of 1 x 10-3; 2 x 10-3; 4 x ; 4 x 10-3 ; 5 x 10-3 M, relative corrosion rate gave lower. The inhibitor efficiency in succinic acid was 60.60% at concentration 5 x 10-3 for 24 hours. It is concluded that succinic acid having inhibition effect on stainless steel corrosion.
ISOLASI CAPSAICIN DARI OLEORESIN CABAI RAWIT Thaib, Novita; Katja, Dewa Gede; Aritonang, Henry Fonda
CHEMISTRY PROGRESS Vol 8, No 2 (2015)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.8.2.2015.13266

Abstract

This study aims to isolate the capsaicin of cayenne pepper oleoresin by extraction method. The results obtained as much as 0.5 g (0.5%) products of 100 g of dried cayenne pepper. Product is colorless crystalline solid (clear), a melting point of 66 oC and a refractive index of 1.4694. Crystals were analyzed with an infrared spectrophotometer (IR), namely the OH group (3409.9 cm-1 and 1026.1 cm-1), NH stretching and bending (3278.8 cm-1, 1515.9 cm-1 and 920 cm-1) which is a secondary amide, C=C (1643.2 cm-1), CH stretching from CH3 and CH2 (2927.7 cm-1 and 2854.5 cm-1) and CH bending of CH2 and CH3 (1461.9 cm-1 and 1377.1 cm-1), C=O (1747.4 cm-1) and group O-CH3 asymmetric and symmetric (1253.6 cm-1 and 1164.9 cm-1).Penelitian ini bertujuan untuk mengisolasi capsaicin dari oleoresin cabai rawit metode refluks menggunakan pelarut kloroform. Hasil yang diperoleh sebanyak 0,5 g (0,5 %) produk dari 100 g cabai rawit kering. Produk berupa padatan kristal tak berwarna (bening), titik leleh 66 dan indeks bias 1,4694. Kristal yang diperoleh dianalisis dengan spektrofotometer infra merah (IR), yaitu adanya gugus OH (3409,9 cm-1 dan 1026,1 cm-1), NH stretching dan bending (3278,8 cm-1, 1515,9 cm-1 dan 920 cm-1) yang merupakan suatu amida sekunder, C=C (1643,2 cm-1), CH stretching dari CH3 dan CH2 (2927,7 cm-1 dan 2854,5 cm-1) dan CH bending dari CH2 dan CH3 (1461,9 cm-1 dan 1377,1 cm-1), C=O (1747,4 cm-1) serta gugus O-CH3 asimetrik dan simetrik (1253,6 cm-1 dan 1164,9 cm-1).
SINTESIS DAN KARAKTERISASI NANOGRAFIT Wulandari, Restu; Aritonang, Henry; Wuntu, Audy
CHEMISTRY PROGRESS Vol 10, No 2 (2017)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.10.2.2017.27745

Abstract

ABSTRACT The purpose of this research is to synthesis nanografite by using physics method. Nanografite  was synthesized using physics method by heating graphite powder at 1000oC. Characterization of nanografite was analyzed by using Scanning Electron Microscope (SEM). The result of the SEM characterization shows the heated nanographite at 1000 ° C having the smallest thickness of 20 nm and the largest 40 nm whereas in `unheated graphite heading has the smallest thickness size 169 nm and the largest 889 nm. From the results of the research can be concluded that the graphite powder heated at high temperatures can be nanografit so that the surface area is larger and can expand the application of nanografit. Keywords: nanografit, physics method, scanning electron microscope (SEM)    ABSTRAK Tujuan dari penelitian ini untuk mensintesis nanografit dengan mengunakan metode fisika. Nanografit disintesis menggunakan metode fisika dengan memanaskan serbuk grafit pada suhu 1000 oC Karakterisasi nanografit dianalisis dengan menggunakan Scanning Electron Microscope (SEM). Hasil dari karakterisasi SEM menunjukan nanografit yang dipanaskan pada suhu 1000 oC memiliki ukuran ketebalan terkecil 20 nm dan yang terbesar 40 nm sedangkan pada `sebuk grafit yang tidak dilakukan pemanasan memiliki ukuran ketebalan terkecil 169 nm dan yang terbesar 889 nm. Dari hasil penelitian dapat disimpulkan bahwa serbuk grafit yang dipanaskan pada suhu tinggi dapat menjadi nanografit sehingga luas permukaannya lebih besar dan dapat memperluas aplikasi dari nanografit. Kata kunci: nanografit, metode fisika, scanning electron microscope (SEM)   
SINTESIS DODEKIL KLORIDA DARI REAKSI KLORINASI DODEKANOL DENGAN POSFOR TRIKLORIDA Aritonang, Henry
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4968

Abstract

Synthesis of dodecyl chloride produced by chlorination reaction of dodecanol with phosphor trichloride was14,48 grams (70,81%). Product of dodecyl chloride was identified by IR spectrometry which shows strongabsorption at 1425-1415 cm-1indicating vibration of group C-Cl and this vibration was supported at 850-600 cm-1 Keywords : dodecyl chloride, chlorination, dodecanol, phosphor trichloride
SINTESIS NANOPARTIKEL PERAK (Ag) DENGAN REDUKTOR NATRIUM BOROHIDRIDA (NaBH4) MENGGUNAKAN MATRIKS NATA-DE-COCO Salasa, Dorlina; Aritonang, Henry; Kamu, Vanda
CHEMISTRY PROGRESS Vol 9, No 2 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.2.2016.27984

Abstract

ABSTRAKTujuan dari penelitian ini untuk mensintesis nanopartikel perak (Ag) dengan reduktor natrium borohidrida mengunakan matriks nata-de-coco. Nanopartikel perak disintesis menggunakan metode reduksi kimia dengan mereaksikan perak nitrat (AgNO3) dengan natrium hidroksida (NaOH) yang ditambahkan dengan nata-de-coco dan direduksi dengan natrium borohidrida (NaBH4). Karakterisasi nanopartikel dianalisis dengan menggunakan spektrofotometer UV-Vis dan Transmission Electron Microscope (TEM). Analisis terhadap spektra UV-Vis menunjukan bahwa nanopartikel relatif stabil pada panjang gelombang 410,50-440,00 nm. Hasil dari karakterisasi TEM menunjukan nanopartikel perak yang disintesis dengan reduktor natrium borohidrida (NaBH4) menggunakan matriks nata-de-coco memiliki ukuran terkecil 4,74 nm  dan yang terbesar mencapai 22,554 nm.              ABSTRACT The purpose of this study was to synthesize nanoparticles of silver (Ag) with a reducing agent sodium borohydride using matrix nata-de-coco. Silver nanoparticles synthesized using chemical reduction method by reacting silver nitrate (AgNO3) with sodium hydroxide (NaOH) is added to the nata-de-coco and reduced with sodium borohydride (NaBH4). The characterization of nanoparticles was analyzed by using UV-Vis and Transmission Electron Microscope (TEM). Analysis on spektra UV-Vis showed that the nanoparticles were relatively stable at 410.50 to 440.00 nm wavelength. The results of TEM characterization showed that silver nanoparticles synthesized by the reducing agent sodium borohydride (NaBH4) using a matrix nata-de-coco has the smallest size of 4.74 nm and the greatest reach 22.554 nm. 
Co-Authors Audy D Wuntu Audy D. Wuntu Audy Denny Wuntu Audy Denny Wuntu Audy Denny Wuntu Audy Wuntu Bando, Reksih Evander Bungan, Gladys K Ciptati Ciptati Cynthia L. Radiman Dennie Heroike Rompas Dewa Gede Katja Diah Riski Gusti Dingse Pandiangan Djulia Onggo Edi Suryanto Edi Suryanto Elyasib Yunas Lada Elyasib Yunas Lada Erly Marwan Ferdinan P. Ranti Gilbert Marcellus Tjakra Harry Koleangan Harry S. J. Koleangan Herling D. Tangkuman Jackson Pasini Mairing Jackson Pasini Mairing Johnly Rorong Julius Pontoh Kamea, Olyvia Kojong, Talita M. I. Koleangan, Harry Langkis Langkis Lasera, Almendo G. Luntungan, Charissa L. Maryani, Shintya Maulida Rezeki Maureen Kumaunang Novita Thaib, Novita Pandelaki, Elmi C.J. Pujiarti, Pujiarti Pujja Sari Purnama Rachman, Himas A. A. Raganata, Tirza C. Rhodinus Sidabutar Rizkita Rachmi Esyanti Rompis, Jessica Salasa, Dorlina Setia Deliana Pasaribu Sriwati Azis Stifanus Billy Pelle Suaib, Suaib Talita Kojong Taringan, Agres K. Tatinting, Gabriel Dinnydio Tinentang, Heriyanto Tjiang, David Vanda Kamu Vanda S Kamu Vanda S. Kamu Vanda Selvana Kamu Walter Punding