Jurnal Kimia Terapan Indonesia (Indonesian Journal of Applied Chemistry)
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Studi Kimia Tumbuhan Obat Tradisional Indonesia (1) ELUSIDASI STRUKTUR KIMIA TUMBUHAN "SONGA", Strychnos ligustrida BI. (Loganiaceae)
No full textThe plant of Strychnos species were known as a resource of alkaloid compounds. One of them close to Strychnos ligustrida Bl. which its local name known as "Songa" was collected from Nusa Tenggara Barat, Bima area, and evaluated for their chemical constituents.Results of chemical studies on this plant constituents indicated that two out of several components, colobrine N-oxide and strychnine N-oxide alkaloids have been succesfully isolated and identified.Determination of chemical structure of the alkaloid was conducted by analyzing their spectra of infrared, Nuclear magnetic resonances (one and two) dimensional NMR such as IH-IH COSY, 13C-1H COSY, COLOC and mass spectrometry
APLIKASI CARA VOLTAMETRI PELEPASAN ANOOIK UNTUK ANALISIS LOGAM BERAT OALAM PARTIKULAT OARI UOARA
No full textDetermination of heavy metals such as Cu, Pb, Cd and Zn in airparticulate samples have been conducted by using Anodic Stripping Voltammerry method (ASV). Flow injection and wall-jet detector were supplemented to the ASV to improve the sensitivity and reproducibility of the mercury-film electrodes used. The air particulate samples analysed were taken with flow rate of 1 m3/minute. From 5 different places, 20 air samples were analysed and concentration of Cu, Pb, Cd; Zn between 0.0486-16.660 #gjm3 in airparticulates were observed. Limit of detection of the method for Cu, Pb, Cd and Zn were 0.015; 0.020; 0.016; 0.03 ppb respectively. Calibration curves for each metal from 50-500 ppb were linear with correlation coefficient 0.98
PENINGKATAN KUALITAS PAKAN AYAM DENGAN PENAMBAHAN ENZIM : Pengaruh enzim terhadap nilai daya cerna, neraca nitrogen dan neraca energi.
No full textIn order to improve the feed quality, enzyme preparatories were added to the diets, wich all of the main components were plant origin. Five treatments in a completely randomized design were 9 fold replicaed, namely: 1. Diet without enzyme addition (control), 2. (-glucanose added to the diet), 3. Hemicellulase added to the diet, 4. Cellulase added to the diet, 5. (-glucanase, hemicellulase and cellulase added to the diet. To ascertain the digestibility of the nutrients of the treated diets, a total of 90 male chicks of LSLBrown were selected and kept in a climate conditioned room (temperature 22 C, relative humidity 65-70 %, lighting 24 hours per day of 20-25 Lux).The results of this experiment showed that the addition of the enzyme to the diet effected Significantly the digestibility of the fat (p 0,001),ash (p . 0,05) and sugar (p 0,05). The addition of combined (-glucanase, hemicellul ase, and cellulase to the diet improved feed conversion ratio of 9, 7 % compared to the control. The nitrogen effictenoy ratio and anergi efficiency ratio were also significantly better (p O,05), each of 9.8 % and ll.8 %
UJI BANDING METODE ANALISIS KONVENSIONAL DAN INSTRUMENTAL UNTUK PENENTUAN KALSIUM DAN FOSFOR
Get PDFAnalysis of calcium and phosphor has been done by using conventional and instrumental methods. Lorenz gravimetric method was employed to determine phosphor, whereas permanganometric methods used to determine calcium. Spectronic molibdovanadophosphate and atomic absorption spectrophotometric methods were used as control for phosphor and calcium respectively. Samples analysed in this study were molasses and driedfaeces.Results show that there is no significant effect on analysis phosphor by using both Lorenz gravimetric method and its control. Similarly, permanganometrlc methods result in the same value with its control
THE DETERMINATION OF SUGARS BY CHROMATOGRAPHIC METHOD
Get PDFExperiments have been carried out to analyse sugars using TLC and HPLC methods, In the TLC method, separation of sugars was performed on silica plates impregnated with monosodium phosphate and using mixture of ethylacettuel pyridinde/water as an eluent. Whilst in the HPLC method, the use of three column types i.e. diol, RP-18 and modified silica column were tested. The results showed that TLC method was able to measure three sugars i:e. sucrose, glucose and fructose with standard deviations of 11.6%, 7,6% and 1,9%, respectively. On the other hand, the HPLC method with silica column modified by polyamine and compressed with WATERS RCM-l00, showed the best results, in which mixtures of nine sugars were well separated and measured quantitatively with good precisian
PREPARATION OF LEAD ZIRCONATE TITANATE FILM BY SOL-GEL METHOD AND ITS CHARACTERIZATION
Get PDFA ferroelectric material film of Lead Zirconate Titanate, Pb(Zr,Ti)O3 (PZT), was produced by sol-gel method from alkoxide and acetate precursors in a normal propanol solvent system. The excess amount of Pb was 10 mole % more than stoichiometrically used for preparing the solution. The concentration of PZT in coating solution was 0.7 M, and pH of the solution was 4.5. The films was prepared by dip-coating onto slide glass, silica glass and Pt/Ti/SiO2/Si substrate. In order to avoid cracking TiO2 was coated on the glasses as a barrier layer. The asdried PZT film was amorphous from X-ray diffraction. The amount of pyrochlore and perovskite phase depended on the heating temperature and kind of barrier layer. Single perovskite phase was found for coated films on TiO2/SiO2 and Pt/Ti/SiO2/Si heated at 600 C or higher, but it was never found for coated films on SiO2 substrate without barrier layers. Crystallization of perovskite PZT film was retarded when deposited on amorphous substrates as compared to crystalline substrate. The coated film on Pt/Til/SiO2/Si was thicker and smaller in particle size than that of coated film on Ti02/SiO2. A columnar structure with a diameter around 6.5 nm, was observed and no boundary was observed between layers in 9 time dipcoated film on Pt/Ti/SiO2/Si
ADSORPSI ZAT WARNA TEKSTIL PADA ZEOLIT ALAM DARI BAYAH
Get PDFAdsorption equilibrium of a dye stuff (Basacryl Red X. GRL 300% of BASF) on a natural zeolite from Bayah was investigated by studying the effects of dye concentrations, panicle sizes of adsorbent, agitation rates and adsorption temperatures. The experimental results indicated that adsorption follows the Langmuir and Freundlich equations. Adsorption of dye stuff into the zeolite increased by decreasing the adsorbent panicle size and by increasing both temperature and agitation rate. The adsorption ability of the natural zeolite could be increased up to 5-7 % higher than inactroated zeolite via an aktivation proces by treating it with H2SO4, HCL, HNO3, NaOH or heating seperately. It is found that the maximum adsorption by zeolite occured at the base or acid concentration of 0,05 N, or at temperature of 100C
ISOlASI DAN ELUSIDASI SENYAWA KIMIA DARI KULIT POHON Garcinia tetrandra PIERRE
Get PDFA preliiminary study was carried out to isolate theconstituents of the stem bark of Garcinia tetran dra Pierre(Guttiferae). Several species of this family had been known asmedicinal herb, some other contain bioactive constituents andnovel compounds. The isolation were carried out by macerationin n-hexane where crude extract was purified usingchromatographic technique on SIG60 coloumn and n- hexane ethylacetate as eluents by gradient. Two pure compunds werefound and their molecular structures were determined on thebasis of combined spectroscopic methods UV, IR, 1H-NMR, l3C-NmR and MS and comparison with literature. The compouridhad been identified as xanton, 15-hydroxy-20, 21, 22, 23-tetramethyl-3H,11H-dipyrano (3, 2-a ; 2'. 3'-i) xanten-17-one(A), known as Thwaitesixanton and a triterpene as Hopenol - a(Hop-(22) (29)-en 3-0 ol) (B)
RADIASI SINAR ULTRA VIOLET STRAIN ASPERGILLUS ORYZAE UNTUK MENINGKATKAN PRODUKSI ALFA AMILASE
Get PDFMutation of Aspergillus oryzae was carried out by ultra violet irradiation at 254 nm. The mutans obtained with 0, 10, 20,30, 40 and 50 minutes irradiation were screened for their amylolytic activity and alpha amylase production. The latter was carried out by aerobic fermentation using sago (Metroxylon spy starch in shake flasks for five days at 30C with orbital shake at 120 rpm. The observation indicated that the mutant resulted from 10 minute irradiation demonstrated a maximum alpha amylase activity of 1675 Unit/g protein at day-d. The amylase activity was assayed at 40C for 30 minute incubation. The starch utilization was 87% and 3.84 g dry weight of biomass per L medium was produced. The specific activity of alpha amylase obtained from untreated parental strain was 1069 Unitlg protein. Starch consumption and biomass production was 80% and 3.62 g dry weight/ L medium, respectively. The increase of alpha amylase specific activity at 10 minute irradiation time was 56%
EFFECT OF STOPPING FERMENTATION OF Leuconostoc mesenteroides ATCC 10830 (8-512F) AT DIFFERENT GROWTH STAGES ON DEXTRAN FORMATION AND MEDIUM VISCOSITY
Get PDFAt the cut end of deteriorated sugar cane stalks, Leuconostocmesenteroides grows, secreting dextransucrase and formingdextran. When biocide is sprayed, bacteria will be killed butdextransucrase might still be active and forming dextran.In this experiment, it was found that when fermentation wasstopped (L. mesenteroi des were killed) this enzyme(dextransucrase) was still able to form high concentration ofdextran. The amount of dextran formed depended on the time offermentation. It also depended on the p H and temperature duringthe incubation which affect the activity and the stability ofdextransucrase. The higher the incubation temperature (20-30C),the more sensitive dextransucrase activity to the pH changes (PH4.6 - 5.4). The highest dextransucrase stability during a 20 hincubation was found at pH 5,4. The highest activity was foundat 30C for pH 5.4 while at 25C the activity was only slightly10IVer than 30C.Key words: dextran formation, medium viscosity,dextransucrase