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Dodi Iskandar, Dodi
Politeknik Negeri Pontianak Kalimantan Barat
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Journal : JURNAL TEKNOLOGI TECHNOSCIENTIA

 1 
SINTESIS KITOSAN SUKSINAT DARI KITOSAN DAN SUKSINAT ANHIDRID SERTA KARAKTERISTIKNYA melati, Arsyi; Iskandar, Dodi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 2 Februari 2015
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v7i2.198

Abstract

The purpose of this study was to determine the effect of molecular weight of chitosan towards the solubility of chitosan succinate in water. The chitosan succinate was synthesized by succinilation method. In the synthesis, chitosan with different molecular weight, low molecular weight (LMW), medium molecular weight (MMW), high molecular weight (HMW) were reacted with succinate anhydride (1:10) for 24 hours. The infrared spectra of chitosan succinate, showed by wavenumber shift, indicating that there has been interaction between chitosan and succinate anhydride. Based on results of analysis of the characterization of chitosan succinate (Analysis of nitrogen,analysis of degree of substitution, and solubility test in water), succinate chitosan HMW (High Molecular Weight) has the highest level of solubility. At temperature of 800C, it dissolves until 99.34% of solubility, the succinate chitosan has 2.98% of nitrogent content, and 0.60 of degree of substitution. From this research can be inferred that larger molecular weight of chitosan can lead into a higheer degree of substitution and solubility values in water.
KUALITAS BAKTERIOLOGI PADA DEPOT AIR MINUM ISI ULANG DI KOTA PONTIANAK TAHUN 2007 -, Suharno; Nasip, Muhammad; Iskandar, Dodi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 2 No 2 Februari 2010
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v2i2.436

Abstract

Based on the datas of health departement of Pontianak City, the Number of the refill drink water storehouse had been achieved 57. People as consumer of it have the right to get insurance of health and safety. Therefore there was needed to study bacte-riolgical test.This study was to get datas and to learn the coliform bacteriological contents of raw water and processed water on the refill drink water storehouse in Pontianak City. Raw water resource in Pontianak was 100 % derived from mountains. It covered 77.2 % of Anjungan, 12.3 % of Paniraman, 10.0 % of Sui Purun. It had Most Probable Coliform Number and Echericia Coli Number were 71.9 % and 59.6 % in sequence. These did not fulfill the requirements of health standard yet. Like wise, processed water of storehouse in Pontianak possessed 33.3 % of Most Probable Coliform Number and 15.4 % of E.Coli Number. The quality of raw water had significant coherence with Most Probable Coliform Number and Echericia Coli Number. Other factors that related to product of processed water quality were: The protection of raw water, disinfection processing, and water re-filling processing to plastic flask. Hence, the advice for processing manager of drinking water were to more taking a care the quality by disinfection pretreatment and protection. It was suggested for the health department to monitor and to evaluate continuesly at least every six months. It was recommended to people to choose selectively became customer of refill drinking water storehousers. Choose between them that had steril and saniter processing.
SINTESIS KARBOKSIMETIL KITOSAN TERHADAP PENGARUH KONSENTRASI NATRIUM HIDROKSIA DAN RASIO KITOSAN DENGAN ASAM MONOKLORO ASETAT Rahmawati, Helda; Iskandar, Dodi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 2 Februari 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v6i2.561

Abstract

This study aims to determine the effect of NaOH concentration and the ratio of monocloro acetic acid with chitosan used in the synthesis process to the degree of substitution and solubility in water. Preparation of carboxymethyl chitosan (CMCts) was carried out by various concentration of NaOH and ratio of monochloro acetic acid with chitosan. The concentration of NaOH used in the alkalination process were 10, 20, 30, 40, and 50% (w/v). The ratio of chitosan: monochloro acetic acid used for etherification were 1:0,5; 1:1; 1:1,5; and 1:2 (w/w). Etherification was carried out at a temperature of 60°C for 2 hours. The results showed that the NaOH concentration of 10-30% (w/v) increased the substitution degree and solubility of produced CMCts. But at concentrations above 30% (w/v) the substitution degree and solubility were decreased. The ratio of chitosan : monochloro acetic acid also affect to substitution degree and the solubility of synthesized CMCts. The higher amount of monochloro acetic acid added to chitosan, the higher is substitution degree and the solubility of carboxymethyl chitosan synthesized in water. The best result was obtained when the ratio of chitosan : monochloro acetic acid were 1:2 (w/w). Within this ratio a 92.05% of yield was resulted with a solubility of 28.05 g/L and a substitution degree of 0.72.
APLIKASI UJI SKRINING FITOKIMIA TERHADAP DAUN UNCARIA TOMENTOSA SEBAGAI BAHAN UTAMA DALAM PEMBUATAN TEH Iskandar, Dodi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 2 Februari 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Uncaria Tomentosa plants grow around Pontianak and peat forests in West Kalimantan. The leaves of it turned out to have a high selling value, even some were exported abroad. The benefits of Uncaria Tomentosa leaves are as an ingredient in making herbal tea. This leaf has efficacy as a remedy for sore bronchitis, sore throat, water fat, tumors, asthma, and clamydia or sexually transmitted diseases, especially in young women. Departing from this, there needs to be publications that reveal scientifically about this plant. So that by knowing the content of compounds that are in the leaves can break the community to be able to process it from raw material into pure material so that it hopes will increase the sale value even higher. But to go there, of course, must first start from basic research. The content of chemical compounds in plants is called phytochemicals. This Plant has chemical compounds source that can be used as medicine. The method used in this research is experimentation in the laboratory. Using phytochemical screening tests following Novindriana, et. al. (2013) procedure. The result is that the ethanol extract of Uncaria Tomentosa leaves contains alkaloid, flavonoid, polyphenol, triterpenoid, steroid, saponin, and tanin compounds.
UJI AKTIVITAS ANTIFUNGI EKSTRAK METANOL DAUN PEPAYA (CARICA PEPAYA L.) TERHADAP COLLETOTRICHUM GLOESPORIOIDES PENYEBAB PENYAKIT ANTROKNOSA PADA TANAMAN KAKAO (THEOBROMA CACAO L.) Iskandar, Dodi; Erdiandini, Ira; Deonesia, Marsiana
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 2 Februari 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Telah dipelajari uji kualitatif fitokimia ekstrak daun pepaya dan uji penghambatan terhadap Colletotrichum gloesporioides yang menyebabkan penyakit antroknose pada tanaman kakao (Theobroma cacao L.). Secara kualitatif, ekstrak metanol daun pepaya (Carica Papaya L.) menunjukkan adanya alkaloid, saponin, flavonoid, dan terpenoid-steroid yang positif. Ekstrak ini juga memiliki penghambatan terhadap penyakit antraknosa (Collectotrichum gloesporioides) setelah periode 10 hari dengan variasi konsentrasi menunjukkan data sebesar 8,4% (10 mg / mL), 14% (20 mg / mL), 17% (30 mg / mL) dan 20% (40 mg) / mL). Sementara itu, untuk periode 20 hari dengan variasi konsentrasi yang sama menunjukkan penghambatan 14% (10 mg / mL), 16% (20 mg / mL), 16% (30 mg / mL), dan 17% (40 mg / mL)).
PEMBUATAN TEH DAUN GAMBIR (Uncaria Gambir Roxb) ASAL KALIMANTAN BARAT PADA VARIASI SUHU PENGERINGAN Iskandar, Dodi; Ramdhan, Noval Aditya
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia-Vol 13 No 1-Agustus 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Gambir (Uncaria gambir roxb) belongs to family Rubiaceae and genus Uncaria. The content of chemical compounds in plants is called phytochemicals. Plants can be a source of chemical compounds that can be used as medicine. The method used in this study is an experiment in the Laboratory, using qualitative phytochemical testing following procedures (Tariq and Reyaz, 2012) and total phenol testing using the Folin-Ciocalteau method from Xu and Chang (2007). Gambir leaf tea characteristics approaching SNI 2013 are at a temperature of 90oC with a moisture content of 14, 3223% (db), 16.8312%. Ash content of 90oC 3,9326 with total phenol levels contained in gambier leaves 3.9 mg GAE/10mg. The compounds contained in gambir leaves include flavonoids, tannins and saponins.
Co-Authors ,, Ichsan Achmad, Dwi Isyana Adi Hermansyah, Adi Danie Indra Yama Daniel Happy Putra Deonesia, Marsiana Desdy Hendra Gunawan Fakhrudin, Jaini Helda Rahmawati Ichsan Ichsan Lamria Mangunsong Lidia Chronika Masruri Masruri melati, Arsyi melati, Arsyi MUHAMMAD ALI Muliani Muliani Nashi Widodo Nasip, Muhammad Nasip, Muhammad Nugroho, Rylo Purwandani, Ledy Rahmawati, Helda Ramdhan, Noval Aditya Rista Delyani Rollando, Rollando Senam Senam Sesario, Revi Siswoyo Siswoyo Sri Purnami, Sri SUHARNO - Suharyani Amperawati Supriyadi Supriyadi Susana Susana Susilo, Muhammad Warsito Warsito Wasis, Th. Chandra Y. Erning Indrastuti Yuni Hendrowati, Tri