Indo. J. Chem. Res.
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Analisis Kadar Logam Kadmium (Cd) dan Timbal (Pb) pada Sedimen Di Teluk Ambon Bagian Dalam
Get PDFThe research about analysis of cadmium (Cd) and lead (Pb) metal content on sediment inner part of Ambon Bay has been done. Sampling point located at Dermaga Ferry Poka, PLTD Poka, Kate-kate, Waiheru, Lateri III, Passo dan PLTD Galala. The results of analyzed of sediment particle size inside the Ambon Bay showed 3 components were sand, gravel, and sludge, but the sediments was dominated by sludge sand. Analysis of Cd content showed that at 7 stations in Ambon Bay detected Cd metal with the highest concentration at 4th station of Waiheru village was 0,6640 mg/Kg and the lowest concentration at 3th station of Kate-kate village was 0,0980 mg/Kg. Meanwhile, the highest Pb content was 20,075 mg/kg at 4th station and the lowest was 5,755 mg/kg at 2nd station of PLN Poka. The content of elements composition of sediment are SiO2, K2O, P2O5, Fe2, BaO, NiO and Ga2O3 but Cd and Pb metal was not detected
Screening Of Phytochemicals And Bioactivity Test Of The Leaves Breadfruit (Artocarpus altilis)
Get PDFScreening phytochemical and bioactivity test of breadfruit leaves (Arthocarpus altilis) have been done. The samples were used in the study extracted by maceration method with some solvent polarity enhanced, there are: n-hexane, chloroform, ethyl acetate, and methanol. The bioactivity test use BST (Brine Shrimp Lethality test). The activity assay use brine shrimp A. salina Leach. Content of the secondary metabolites in four crude extract of leaves of breadfruit (A. altilis) are alkaloids, steroids, terpenoids, and flavonoids. Whereas only phenolic compounds contained in the crude extract of chloroform and methanol. The saponins content only in the crude extract methanol. The fourth test of bioactivity of the crude extract of leaves of breadfruit there are: n-hexane, chloroform, ethyl acetate, and methanol had LC50: > 1000 mg / mL; 387.436 mg / mL; 415.623 mg / mL; and 392.826 mg / mL respectively. The crude extract of chloroform, ethyl acetate, and methanol classified active in the BST test to brine shrimp A. salina, while the crude extract n-hexane classified as inactive. The Leaves of breadfruit (A. altilis) has potential to be used as medicine
Kinetic Study And Isoterm Adsorption Of Pb Metal In Ouw Village Clay Activated Ammonium Nitrate Salt
Get PDFKinetics studies and adsorption isotherms of Pb metal have been conducted on activated clay salts of ammonium nitrate (NH4NO3). Clays used are taken from Ouw village, Central Maluku. Clay activated by soaking in a solution of NH4NO3 700 ppm for 5 hours, then filtering and heating in a furnace at 550 oC for 4 hours. The optimum adsorption of metal ions Pb (II) by activated clay ammonium nitrate occurs at pH 4 with a contact time of 4 hours and followed the Freundlich adsorption isotherm pattern with a Kf value of 1.6193 x 10-8 mg/g and n value of 0.2059. Pb adsorption kinetics followed the pseudo-second-order Lagergren equation with the value of the adsorption rate constant (k2, ads) of 0.1248 g mg-1 min-1 and Xe value of 4.4783 mg/g
Adsorpsi Hg(II) Menggunakan Sargassum crassifolium dengan Adanya Pb(II), Cu(II) dan Fe(II)
Get PDFAmalgamation use mercury in mining process especially small-scale gold mining and it has been impacted on mercury contamination in environment. Mercury is one of heavy metal that toxic and can accumulate in water, soil and organism. Adsorption method is one of alternative option that effective to remove heavy metal. This method depends on adsorbent type, pH, adsorbent composition with metal or presence of several metal ions. Beside mercury, wastewater of mining gold have another metal ions such as Pb(II), Cu(II) dan Fe(II) can be found by human activity or naturally present. This research aim is to study effect of Pb(II), Cu(II), and Fe(II) in Hg(II) adsorption by using Sargassum crassofolium adsorbent. Research stages are adsorbent activation and mercury adsorption on binary and ternary system respectively in equimass amount of metals ion and equimolar amounts of metals. Based on adsorption analysis is known that Pb(II) and Cu(II) is Hg(II) competitor while Fe (II) is not Hg(II) competitor in adsoption by using Sargassum crassifolium. On binary system in equimass amount of metals ion and equimolar amounts of metals that the largest decreasing effect of Hg(II) adsorption in system contain Cu(II)
Produksi DAG Dari Virgin Coconut Oil (VCO) Melalui Reaksi Trans-Esterifikasi Menggunakan Enzim Lipase Dedak Padi (Oryza Sativa L.) Spesifik C18-20 Terimobilisasi Karbon Aktif Sebagai Biokatalis
Get PDFThis research aims to produce DAG of the VCO through the substrate reaction of trans-esterification using lipase enzymes specifically C18-20 from rice bran (Oryza Sativa L.) immobiled of activated carbon as a catalyst. Phases of this research starts with the enzyme lipase do immobile using activated carbon; next enzymes of immobile used to produce DAG through the trans-esterification reaction using a VCO as a substrate and methanol as ko-substrate; DAG and methyl ester produced identified using FTIR instrument and GC-MS instruments. The results showed that there were three compounds DAG and three compound methyl ester produced trans-esterification reaction, namely (1) 1-laurin, 3-heksanoin esters of glycerol; (2) 2-laurin, 3-oktanoin esters of glycerol; (3) 1-laurin, 3-heksanoin esters of glycerol; (4) methyl ester oleic; (5) methyl ester stearic acids; and (6) methyl ester arachidat
Imobilisasi Enzim Lipase Dedak Padi (Oryza Sativa L.) Pada Karbon Aktif: Karakterisasi, dan Uji Stabilitas Kerja Enzim Imobil
Get PDFThis research aims to immobilization; characterize the enzyme of immobilized, test the effectiveness of the enzyme of immobilized. This research begins with the immobilization to process of enzyme lipase using activated carbon matrix, enzyme characterization covering of immobile determination of temperature and pH optimum of the enzyme of immobilized, as well as test the stability of work covering immobilized of enzyme the test thermal stability and repeated use. The results showed that the immobile of enzyme work optimally at 50oC of temperature and pH 6.5 with each activity 0.040 U/mL; research results also showed that the immobile of enzyme has higher thermal stability in comparison with the free enzyme: with the relative activity of 57.50% at the time of 45 minutes of exposure and the exposure time at 47.50% at 75-105 minutes and it can be used as many as six times with the relative activity of 52.5% in 6 times of use
Analyzed The Resistant Starch Content of Some Types of Sago Starch In Embarrassment with Heating Temperature Variations
Get PDFoai:ojs3.unpatti.ac.id:article/59Analyzed the resistant starch content of some types of sago starch in embarrassment with heating temperature variations have been conducted. In this analysis was done processing sago starch suspension, determination of the fat content of flour, qualitative test and analysis of starch digestibility and resistant starch manufacture of some types of sago starch in Maluku (sago ihur, sashes, molat) by varying the temperature of the heating method. The results were obtained moisture content of the sample base for this type of sago ihur 49.61%, 45.85% and sashes molat 47.77% while for the corn starch to the type ihur 9.329%, 6,245% and Molat sashes 5,793% while the tannin-free corn starch to type ihur 5.362%, 5,407% and molat sashes 4,719% and ash content of corn starch to the type ihur 0.09656%, 0.0761% and molat sashes 0.07146%. Glucose levels in samples of corn starch (type ihur, sashes and Molat) is hydrolyzed by the enzyme pancreatin is greater than the resistant starch glucose levels ranged from 1-1.4 mg / mL whereas for resistant starch samples with smaller temperature variation which is equal to 0.6-1.0 mg / mL. 
Uji Fitokimia dan Toksisitas Ekstrak Kloroform Kulit Batang Melochia umbellata (Houtt.) Stapf var. Visenia dengan Metode Bhrine Shrimp Lethality Test (BSLT)
Get PDFPaliasa plants Melochia umbellata (Houtt.) Stapf var. Visenia is classified into species M.umbellata (Houtt.) Stapf which was potent to heal various of illness. The aim of this research to know secondary metabolites and its toxicity from extract chloroform stem bark of M. umbellata (Houtt.) Stapf var. Visenia. The step in this research were: maceration to obtain extract chloroform, phitotochemical assay to identify the group of secondary metabolites, and toxicity assay by using Bhrine Shrimp Lethality Test method. It was obtained 46 g of green concentrated exctract of chloroform. The result of phytochemical assay show that the extract contain steroid and alkaloid groups. The crude extract chloroform is toxic against Artemia salina with LC50 value is 53,57 µg/ml
Biosintesis Nanopartikel Perak menggunakan Ekstrak Daun Ketapang, Modifikasi dengan Asam p-kumarat untuk Aplikasi Deteksi Melamin
Get PDFBiosynthesis of silver nanoparticles (AgNPs) using ketapang leaf extract, modification with p-coumaric acid for detecting melamine has conducted. This research aimed to synthesize AgNPs via bio-reduction method using ketapang leaf extract followed by modification with p-coumaric acid (APK), and evaluating its application detecting melamine. The AgNPs were characterized through ultraviolet-visible absorption spectroscopy (UV-Vis) and X-ray diffraction (XRD). Observation suggested that an increase of incubation time had affected its surface Plasmon resonance trend. Further analysis of crystallite via XRD suggested that nanoparticle size at 43 nm estimated using Debye-Scherer, within the form of unit cells is cubic. The performance of product as melamine detector suggested that the AgNPs-APK had detected melamine in range of concentration from 0.1 to 1000 ppm
Effect Of Tamarind (Tamarindus indica L.) Extract To Histamine Content In Bullet Tuna (Auxis rochei)
Get PDFThe research to determine histamine content in bullet of tuna (Auxis rochei) with variation of tamarind
(Tamarindus indica L.) extract concentrations and time of marinate has been done. The histamine
content is determined quantitatively by using ultraviolet-visible spectrophotometer with the calibration
curve method. The result showed that histamine content in bullet tuna marinated in tamarind extract
with varied concentrations of 5%, 10%, 15%, and 20% within 10 minutes, are 37.4561, 35.3041,
23.8778, and 22.1186 mg/100 g respectively. While, the concentrations of histamine in bullet tuna
marinated in 20% of tamarind extract with variation of 10, 20, 30, 40, and 50 minutes, are 22.2965,
19.7544, 17.6925, 11.5865, and 8.0396 mg/100 g respectively. A qualitatively, visual comparison of
colour intensity of samples with reference colour scale of the standard solution concentration can be
used to determine concentrations of histamine without the aid of a spectrophotometer