Metal ions
Determination of metal ions in fuel ethanol after preconcentration on 5-amino-1,3,4-thiadiazole-2-thiol modified silica gel
... preconcentrate metal ions from solutions, have been described 9-12 ...the metal ions before analysing by atomic absorption spectrometry 13-15 ...
5
Metal ions, not metal-catalyzed oxidative stress, cause clay leachate antibacterial activity.
... The first goal of the present study was to determine whether the acidic environment itself is exerting a degree of toxicity or whether it is simply necessary to maintain the desorbed metal ions in their ...
21
Synthesis, characterization and thermal studies on solid 3-methoxybenzoate of some bivalent transition metal ions
... corresponding metal chloride solutions or sulphate for copper until total precipitation of the metal ...sulphate ions (qualitative tests with AgNO 3 /HNO 3 solution for chloride ions or BaCl 2 ...
7
Potentiality of agricultural adsorbent for the sequestering of metal ions from wastewater
... the metal ion located at the adsorbent surface and liquid phase thereby making it uneasy for the remaining surface sites to undergo further ...such, metal adsorption tends to decrease gradually with ...
32
Aquatic humic substances: molecular size fractionation and characterization of inner rearrangements after metal ions complexation.
... AQUATIC HUMIC SUBSTANCES: MOLECULAR SIZE FRACTIONATION AND CHARACTERIZATION OF INNER REARRANGEMENTS AFTER METAL IONS COMPLEXATION. The aquatic humic substances (AHS) investigated in this study were ...
6
Synthesis, characterization and thermal studies of solid state 4-methylbenzylidenepyruvate of some trivalent metal ions
... interferent ions, filtered through and dried on Whatman ...and metal ion contents were determined from the TG curves. The metal ions were also determined by complexometric titrations with ...
6
Synthesis, characterization and thermal behaviour of solid 2-methoxycinnamylidenepyruvate of some bivalent metal ions in CO2 and N2 atmospheres
... and metal contents. The metal ions were also determined by complexometric tritration with standard EDTA solution [13, 14] after igniting the compounds to their respective oxides and then dissolving ...
8
Synthesis, characterization and thermal behaviour on solid pyruvates of some bivalent metal ions
... standard EDTA solution [9]. The metal ions con- tents were also estimated from their correspon- ding TG curves. The dehydration of the compoun- ds was irstly pointed out by their DTG curves and subsequently ...
7
Metal Ions and Protein Folding
... of metal ions make them indispensable for living organisms, which however keep metal ion homeostasis through a complex machinery which constantly adjusts the metal ion concentration and ...
317
Effect of divalent metal ions on the activity and stability of β-galactosidase isolated from Kluyveromyces lactis
... the metal ions on enzyme thermal stability may be observed in the slightly more accentuated decrease in residual activity of the apoenzyme relative to the ...coordinated metal has been described for ...
8
L-ascorbic acid: complexation and redox reactions with some transition metal ions.
... L-ASCORBIC ACID: COMPLEXATION AND REDOX REACTIONS WITH SOME TRANSITION METAL IONS. The strong reducing action of L-ascorbic acid (Vitamin C) are of fundamental interest in biochemical and related process. ...
9
J. Braz. Chem. Soc. vol.17 número7
... heavy metal ions (due to their higher charge density), in the PVC ...transition metal ions, including lanthanum, cerium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, and ...
7
Braz. J. Chem. Eng. vol.23 número2
... The selectivity of the resin can be analyzed using the breakthrough results. Figure 2 shows the adsorption breakthrough curve for Pb 2+ , Cd 2+ and Cu 2+ at 22 °C using the IRC-50 cation exchange resin. In these ...
6
Standard Endoglucanase Activity assay
... Lignocellulose-degrading insects are attractive potential candidates to prospect for novel cellulolytic microorganisms and enzymes. In this investigation, a potential novel cellulolytic bacterium Arthrobacter sp. HPG166 ...
10
Uptake of Cadmium by Pseudokirchneriella supcapitata
... The mathematical model developed describes the uptake of cadmium metal ions by P. subcapitata. The model is described by two removal mechanisms: surface adsorption and transportation through the membrane. ...
8
J. Braz. Chem. Soc. vol.12 número4
... comprising metal ions and single ligand species, and which in principle should be capable of accessing the highest levels of structural complexity at the molecular level in the shortest number of ...of ...
32
DESORPTION OF HEAVY METALS FROM ION EXCHANGE RESIN WITH WATER AND CARBON DIOXIDE
... The selectivity of the resin can be analyzed using the breakthrough results. Figure 2 shows the adsorption breakthrough curve for Pb 2+ , Cd 2+ and Cu 2+ at 22 °C using the IRC-50 cation exchange resin. In these ...
6
ANTHOCYANIN PIGMENTATION IN TRITICUM AESTIVUM L.: GENETIC BASIS AND ROLE UNDER ABIOTIC STRESS CONDITIONS
... Anthocyanins are secondary metabolites of plants. They have a wide range of biological activity such as antioxidant, photoprotection, osmoregulation, heavy metal ions chelation, antimicrobial and antifungal ...
1
Mat. Res. vol.19 número5
... to cellulose except that the hydroxyl groups in the cellulose molecule are substituted with amino groups in chitosan. The amino and hydroxyl groups in chitosan can be coordinated with metal ions to from ...
8