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I Wayan Sutapa
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INDONESIA
Chemistry Indonesian Journal of Chemical Research
  • Indonesian Journal of Chemical Research (Indones.
  • Website
Published by Universitas Pattimura
ISSN : 23385359     EISSN : 26142627     DOI : 10.30598//ijcr.2021.-irm
Core Subject : Science, Social, Engineering,
Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science
Indo. J. Chem. Res. is a journal that regularly publishes primary articles covering all branches of chemistry and its sub-disciplines. Published articles consist of complete research, short communication, and review articles. The scope of published articles is not limited to inorganic chemistry, physical chemistry, organic chemistry, analytical chemistry, and biochemistry. Editors can invite articles review of authors that includes the latest developments in the field of interest of certain chemicals. A contribution is open to researchers from all countries.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 314 Documents
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Pemodelan Regresi Berganda Pada Pemanfaatan Tanah Liat Dan Batu Karang Sebagai Adsorben Dalam Pengolahan Greywater Dho Tawa, Bibiana; Kale, Alfius R.; Hadijah Salim, Siti; E. Selan, Odi Th.
Indonesian Journal of Chemical Research Vol 5 No 2 (2018): Edisi Bulan Januri (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.5-bib

Abstract

The aims of this research are to determine the adsorbent properties, the effect of flow rate and ratio of adsorbent in lowering COD, turbidity, pH levels, and to determine the effect of flow rate interaction and adsorbent ratio in decreasing COD, turbidity and pH levels. This research was conducted with Completed Random Design (CRD) 23 consisting of 2 independent variables namely flow rate (0.2; 0.5; and 0,7 mL/s) and ratio of adsorbent (w/w) of clay : coral (1:1; 1:2; and 2:1) with 3 times replications. The result of the test of the adsorbent properties showed that the clay has hihger acidity and surface area then coral reef, and the coral content of coral reefs is 38.65 %. The flow rate and the ratio of adsorbent based on results of the study also reinforced by the ANOVA test give effect on the levels of COD and turbidity while the interaction of this two variables have an effect on the COD content. The best treatment based on Duncan Multiple Range Test (DMRT) was at 0.7 mL/s flow rate with a 1:1 adsorbent ratio. The multiple regression model for this study is Y =160.3 – 171.17X1 -188.83X2 + 31.67X1X2 + 146.67X12 + 66.67X22.
Analisis Serbuk Biji Kelor (Moringa Oleifera, Lamk) dalam Menurunkan Kadar COD dan BOD pada Air Limbah Jasa Laundry Rustiah, Waode; Andriani, Yuli
Indonesian Journal of Chemical Research Vol 5 No 2 (2018): Edisi Bulan Januri (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.5-wao

Abstract

Water pollution at this time is very apprehensive; especially many laundry businesses are located around the home residents. Waste laundry waste water is a derivative of organic substances. The content of organic substances in waste water laundry services has resulted in high levels of COD and BOD of water, which can cause pollution to the environment and become toxic to life in the water. Therefore it is necessary to do a solution to overcome the contamination, such as by using coagulant seed of Moringa Oleifera, Lamk. The purpose of this study is to determine the effectiveness of Moringa Oleifera, Lamk seed coagulant in lowering the levels of COD and BOD on laundry waste laundry services. Based on the results of the study, it can be concluded that the excellent COD decrease obtained at the weight of 0.7 grams of 250.00 mg / L with an efficiency of 35%, while the BOD measurement, the best weight in lowering BOD levels is 3.6 grams amounted to 11.616 mg / L with a decrease presentation worth 57.66%.
Waktu Optimum Hidrolisis Pati Limbah Hasil Olahan Ubi Kayu (Manihot esculenta Crantz var. Lahumbu) Menjadi Gula Cair Menggunakan Enzim α-Amilase Dan Glukoamilase Ardiansyah, Ardiansyah; Nurlansi, Nurlansi; Musta, Rustam
Indonesian Journal of Chemical Research Vol 5 No 2 (2018): Edisi Bulan Januri (Edition For January)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.5-ard

Abstract

This study aims to determine optimum time of action of the enzyme α-amylase and glucoamylase needed in hydrolyze of starch from waste processed cassava (Manihot esculenta Crantz var. Lahumbu). This research was conducted through three main stages, namely the gelatinization, liquefaction and saccharification. The method was used method are liquefaction and saccharification. The variation time of the stage liquefaction: 12; 24; 36; 48; 60; and 72 minutes and the saccharification stage are: 9; 18; 27; 36; 45; 54; and 63 hours. The results showed that the optimum time required for stage liquefaction using α-amylase enzyme is 48 minutes on the condition of a temperature of 80 oC with a value of 0.09% amylose levels were measured using UV-Vis spectrophotometer. The optimum time required for saccharification step using a glucoamylase which is 54 hours on the conditions of a temperature of 50oC with the amount of reducing sugar concentration of 9.186 g/L as measured using a UV-Vis spectrophotometer.
Isolasi, Identifikasi, Karakterisasi Dan Uji Toksisitas Senyawa Metabolit Sekunder Fraksi Nonpolar Akar Babandotan (Ageratum conyzoides L) Irmawan, Muhammad; Mandey, Frederyk; Dali, Seniwati
Indonesian Journal of Chemical Research Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.6-muh

Abstract

Ageratum Conyzoides L. has a toxic and bioactive component as anti-cancer and especially for the root, it has anti-tumor. In order to figure out the active component, it is necessary to do four steps; isolation, identification, characterization, and toxicity essay Brine Shrimp Lethality Test (BSLT) of non-polar fraction Ageratum conyzoides L plant. Isolation method consist of four parts; extraction, partitioning of Kupchan method, fractionation, and purification. Fractionation method uses press column chromatography (KTT). Furthermore, purification process uses thin layer chromatography (TLC) and characterization with spectroscopy FTIR, 1H-NMR and 13C-NMR. Then characterization utilizes spectroscopy FTIR, 1H-NMR and 13C-NMR. The toxicity essay toward Artemia Salina Leach n-hexane fraction and dichloromethane fraction showed that the fraction had toxic properties with number of LC50 are 0,0237 and 4,642 µg/mL respectively. Moreover, n-hexane fraction has succeed in isolating Stigmasterol compound shaped white crystalline needles with 19.6 mg weight, 143-144 °C melting point and and had toxic properties with number of LC50 are 30,33 µg/mL.
Isolasi Kitosan Dari Tudung Jamur Merang (Vollvariella Volvaceae) Dan Aplikasinya Sebagai Absorben Logam Timbal (Pb) Tanasale, Matheis F.J.D.P.; Bandjar, Adriani; Sewit, Natasya
Indonesian Journal of Chemical Research Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.6-mat

Abstract

Chitosan isolated from mushroom (Vollariella volvaceae) as adsorbent of lead (Pb) metal has been done. The isolation of chitosan was obtained 2.94% from total weight of mushroom. Fungtional groups of chitin and chitosan were indentified by using FTIR spectrophotometry. The chitosan had 74.66% degree of deacetylation and 2.09 x 104 g/mol viscosity molecular weight. The experimental data of the chitosan as adsorbent for Pb metal were correlated with the Langmuir and Freundlich isotherm model. The maximum adsorption capacity of Pb based on the Langmuir isotherm model was 2.66 mg/g.
Uji Aktivitas Antioksidan Pada Ekstrak Buah Kawista (Limonia Acidissima) Menggunakan Spektrofotometer UV-Vis Rustiah, Waode; Umriani, Nur
Indonesian Journal of Chemical Research Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.6-wao

Abstract

Antioxidant activity test has been done on kawista fruit. This study aims to determine the antioxidant activity of kawista based on the test using UV-Vis spectrophotometer conducted wavelength (l) 516 nm. The kawista fruit is extracted by reflux using methanol solvent. The extracts were made at concentrations of 50 ppm, 100 ppm, 150 ppm, 200 ppm and 250 ppm. The results showed that the antioxidant activity based on IC50 values obtained on kawista fruit extract samples had a concentration of 1275 mg / ml. The results obtained are at the level of IC50> 150 mg/ml, this indicates that the kawista fruit have weak antioxidant ability.
Analisis Kadar Sianida Pada Rebung Berdasarkan Volume Ukuran Dari Kecamatan Bajeng Kabupaten Gowa Arisanti, Dewi; Rasyid, Nur Qadri; Nasir, Muh.
Indonesian Journal of Chemical Research Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.6-dew

Abstract

Bamboo shoots are young shoots from bamboo Terubus. Bamboo shoots contain cyanide if consumed can cause shortness of breath, decreased blood pressure, rapid pulse, headache, nausea, diarrhea, mental disorders and seizures. Continuous consumption with low doses causes mumps and dwarfism and neurological diseases. This study aims to determine how much cyanide levels in bamboo shoots and this type of research is a descriptive laboratory experiment. The sample used in this study were 3 samples based on the size of the volume. The sampling technique is by means of purposive sampling that is looking at the criteria based on large, medium and small size types. Analysis of cyanide levels was obtained by UV-Vis Spectrophotometer with a wavelength of 582 nm. The results showed that large size bamboo shoots were height = 27 cm; diameter = 16 cm has a cyanide content of 21.84 mg/kg, medium size were height = 18 cm; diameter = 7 cm has a cyanide content of 18.40 mg / kg and a small size of height = 8 cm; diameter = 4 cm has cyanide content of 4.65 mg/kg. Thus it can be concluded that the greater the size of bamboo shoots have height level of cyanide.
Kinetika Adsorpsi Zat Warna Metilen Biru Oleh Karbon Aktif Dari Kulit Kemiri (Aleurites moluccana (L) Willd) Latupeirissa, Jola; Tanasale, Matheis F.J.D.P.; Musa, Sigit Hardianto
Indonesian Journal of Chemical Research Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.6-jol

Abstract

The adsorption of methylene blue dye by active carbon of hazelnut shell has been done. Through acquired active carbon composing process, where is the hazelnut shell at entry into furnace on temperature 350 for 2 hour, afterwards is cooled and at sieves by sieve 100 mesh. Then by the calsination process in furnace with temperature 450 one was streamed to gas N2 four 2 hours then characterized by X-ray diffraction (XRD) for carbon before activation. The next activated with KOH solution with a concentration 0f 50 four 5 hour, then dried in an ovenat 120℃ for 1 hour and thencharacterized. Weight of the solidacidity before and after activation consecutive (5.3848 x 10-3 dan 42.1554x 10-3) mol g-1. Isotherm adsorption of methylene blue dyes on active carbon was following the Freundlich isotherm. Adsorption kinetics of methylene blue dyes on active carbon in various concentration of hazelnut shell was controlled with temperature variety at 25 and 30 . The result showed that energy activation was kJ mol-1 and a value isg mg-1 menit-1. Adsorption mechanism of methylene blue dyes on active carbon at various concentration of hazelnut shell is chemical adsorption process.
Biosorpsi Ion Logam Tembaga (Cu2+) Pada Biosorben Rumput Laut Coklat (Padina australis) Bijang, Catherina M.; Latupeirissa, Jolantje; Ratuhanrasa, Marike
Indonesian Journal of Chemical Research Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.6-cat

Abstract

The research on the biosorption of Cu2+ metal ions in brown seaweed biosorbent (Padina australis) has been done. This study aims to determine moisture content, ash content, biomass content, pH and optimum contact time of Cu2+ metal ions absorption pH and optimum contact time of Cu2+ metal ions absorption. The method used is batch method. The adsorption result of Cu2+ metal ions was analyzed by using atomic absorption spectrophotometer (AAS). The results showed that the optimum pH was 7 with 99.8308 % absorption ability of biosorbent and the optimum contact time was 5 hours with 99.5570 % biosorbent absorbency.
Biosorpsi Ion Logam Kadmium (Cd2+) Pada Biosorben Rumput Laut Coklat (Padina australis) Asal Pantai Liti Pulau Kisar Bijang, Catherina M.; Tehubijuluw, Helna; Kaihatu, Terence Ghereds
Indonesian Journal of Chemical Research Vol 6 No 1 (2018): Edisi Bulan Juli (Edition For July)
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2018.6-cath

Abstract

The research about biosorption of Cadmium (Cd2+) metal ion in brown seaweed biosorben (Paladina australis) from Liti beach, Kisar island has been done. Analysis of decreasing Cd2+ content using Atomic Absorption Spectrophotometer (SSA) and also use FTIR to know functional groups contained in alginate compounds. A total of 0.5 g of brown seaweed powder was introduced into 25 mL of Cd2+ 50 ppm solution with variations of pH 1-7 and shaker for five hours. After the optimum pH was obtained, the adsorption process was applied on pH 5 solution with variation of contact time 1, 3, and 5 hours, after which it was filtered. The result of analysis and calculation showed that Cd2+ ion was optimum at pH 5 of 99.64% and 3 hours contact time was 74.54%.

Page 9 of 32 | Total Record : 314

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