Quantitation and Adsorption of Glyphosate Using Various Treated Clay

2017 ◽  
Vol 231 (11-12) ◽  
Author(s):  
Rodrigo Mattos ◽  
Sabir Khan ◽  
Sajjad Hussain ◽  
José de Alencar Simoni
Keyword(s):  
Low Cost ◽  
Chemical Characterization ◽  
Adsorption Capacities ◽  
Physico Chemical ◽  
As Adsorption ◽  
Uv Visible

AbstractThe objective of this work is to develop a low-cost, alternative UV-visible Spectrophotometer method using ninhydrin to the current chromatography techniques (GC and HPLC), which is usually use for the quantitation of glyphosate. The physico-chemical characterization, such as adsorption capacities, effect of time and temperature has been studied. The reaction between the ninhydrin and compounds that present NH

scholarly journals Physico-Chemical Characterization and Biological Screening of Cyanex 302 complexes

2012 ◽  
Vol 4 (2) ◽  
pp. 427 ◽  
Author(s):  
T. K. Pal ◽  
M. A. Alam ◽  
M. A. A. A. A. Islam ◽  
S. R. Paul
Keyword(s):  
Metal Complexes ◽  
Magnetic Measurements ◽  
Chemical Characterization ◽  
Molar Conductance ◽  
Mass Determination ◽  
Ir Studies ◽  
Cyanex 302 ◽  
Physico Chemical ◽  
Uv Visible ◽  
Antibacterial And Antifungal

Several new complexes of Cr(III), Mn(II), Fe(II), Co(II) and Cu(II) containing Cyanex 302 [bis(2,4,4-trimethylpentyl) monothiophosphinic acid] were synthesized and characterized by elemental analysis, molar conductance, molecular mass determination, magnetic, UV-Visible and IR studies. The prepared metal complexes has the compositions: 2. [CrL3].H2O, 3. K[MnL3].H2O, 4. [FeL2].H2O, 5. K[CoL3] and 6. K[CuL3].H2O (Where, L means anion of bis(2,4,4-trimethylpentyl) monothiophosphinic acid). The complexes 2, 3, 5 and 6 are assumed to have octahedral geometries, but the complex 4 is tetrahedral based on experimental data. From magnetic measurements all the complexes are found to be paramagnetic. Measured molar conductance showed that the complexes 2 and 4 are non-electrolytes and complexes 3, 5 and 6 are electrolytes. Besides, some metal complexes have shown very good antibacterial and antifungal activities.Keywords:  Bis(2,4,4-trimethylpentyl) monothiophosphinic acid; Biological activity.© 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v4i2.9366 J. Sci. Res. 4 (2), 427-435 (2012)

scholarly journals Biosynthesis of fluorescent silver nanoparticles from Leea coccinea leaves and their antibacterial potentialities against Xanthomonas phaseoli pv phaseoli

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
María del Carmen Travieso Novelles ◽  
Annie Rubio Ortega ◽  
Beatriz Alvarez Pita ◽  
Mylene Corzo López ◽  
Lianet Díaz Pérez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Chemical Characterization ◽  
Kinetic Studies ◽  
Spectroscopic Techniques ◽  
Stabilizing Agents ◽  
Physico Chemical ◽  
Environmentally Safe ◽  
Uv Visible ◽  
Microbial Growth Inhibition ◽  
High Degree

AbstractThe synthesis of silver nanoparticles (SNP) from plants is a simple, fast and environmentally safe route. In the present study, the aqueous extract of fresh leaves from Leea coccinea L. was evaluated as a possible source of reducing and stabilizing agents to obtain SNP. The synthesized SNP were characterized by spectroscopic techniques such as UV–visible spectrophotometry and Fourier transform infrared spectroscopy (FTIR), scanning electron and confocal microscopies and the antimicrobial activity against Xanthomonas phaseoli pv. phaseoli was evaluated using agar diffusion methods. The results showed that the evaluated extract was promising for the green synthesis of the SNP, which was visually identified by the formation of a dark-brown complex and the presence of a peak of maximum absorption at 470 nm in a UV–VIS spectrum. FTIR spectrum of SNP showed main characteristic signals of aromatic compounds, carboxylic group among others confirmed by phytochemical screening that made evident the presence of flavonoids, phenols, leucoanthocyanidins, terpenes and steroids groups. Fluorescent SNP with high degree of agglomeration were observed by the microscopical technics used. A promising antibacterial activity of SNP was shown by a zone of microbial growth inhibition. These results suggested the need for going deeper in the physico-chemical characterization and kinetic studies, as well as the biological evaluations to make possible the use of this plant source in the future development of antibacterial formulations for bean seed protection.

scholarly journals Effect of Nitrogen Doping on Photocatalytic Activity of TiO2

2020 ◽  
Vol 6 (4) ◽  
pp. 918-923
Author(s):  
Pawar Mahendrasingh ◽  
Nimbalkar Vrushali ◽  
Gaonar Manisha ◽  
Khajone Anita ◽  
Taywade Rahul
Keyword(s):  
Anatase Phase ◽  
Visible Region ◽  
Chemical Characterization ◽  
Host Lattice ◽  
Doped Tio2 ◽  
Physico Chemical ◽  
N Doping ◽  
Degradation Reaction ◽  
Uv Visible ◽  
Surface Hydroxylation

Nitrogen doped TiO2 nanoparticles (N-doped TiO2) in different mol percentage (2-6 mol%) of nitrogen with anatase phase, have been prepared by using EDTA-glycol method. Samples were characterized by various physico-chemical techniques. Physico-chemical characterization revealed that crystallite size, surface hydroxylation, and tuning of optical band gap towards visible region of catalyst increases with increase in dopant concentration upto 4.0 mol% in TiO2 host lattice. Thereafter, the samples were used to photocatalytic degradation of the organic dye methylene blue (MB) under sunlight irradiation directly. The progress of photodegradation reaction was monitored by UV-visible spectroscopy. During photocatalytic reaction, the effect of calcination temperature, amount of catalyst, initial concentration of dye and the effect of pH on the rate of degradation reaction was also studied. It is clearly shown that N doping in TiO2 results in the enhancement of the degradation ability of MB in UV-visible light.

Laboratory Methods for the Physico-Chemical Characterization of Recombinant Allergens as Reference Standards

Alergologia ◽  
2020 ◽  
Vol 1 (4) ◽  
pp. 7
Author(s):  
Mariana Vieru ◽  
Florin-Dan Popescu ◽  
Laura Haidar ◽  
Carmen Bunu-Panaitescu
Keyword(s):  
Chemical Characterization ◽  
Reference Standards ◽  
Recombinant Allergens ◽  
Laboratory Methods ◽  
Physico Chemical

Mineralogical and physico-chemical characterization of a sintered feldspathic sand

2010 ◽  
Vol 35 (5) ◽  
pp. 261-267 ◽  
Author(s):  
Wissemn Gallala ◽  
Mohamed Essghaier Gaied ◽  
Borhen Kchaou
Keyword(s):  
Chemical Characterization ◽  
Physico Chemical

Physical - Chemical Issues of Cephalosporin Intercalated Nanoparticles for Life - Threatening Infections Treatment

2001 ◽  
Vol 71 (3) ◽  
pp. 342-349
Author(s):  
Lucian Eva ◽  
Letitia Doina Duceac ◽  
Liviu Stafie ◽  
Constantin Marcu ◽  
Geta Mitrea ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Advanced Characterization ◽  
Generation Cephalosporin ◽  
Fourth Generation ◽  
Exchange Method ◽  
Physico Chemical ◽  
Life Threatening ◽  
Double Hydroxide ◽  
Double Hydroxides

The fourth generation cephalosporin antibacterial agent, cefepime, was loaded into layered double hydroxides for enhancing antibiotic efficiency, reducing side effects, as well as achieving the sustained release property. The intercalation of antibiotic into the inter-gallery of ZnAl-layered double hydroxide (LDH) was carried out using ion exchange method, by this constituting a nano-sized organic-inorganic hybrid material for a controlled release novel formulation. Although cefepime is a broad spectrum antibiotic, it has various adverse effects and a significant degradation rate. Thus, the preparation and physico-chemical characterization of nanomaterials able to intercalate this drug is an important study for medical and pharmaceutical field. The antibiotic inclusion into LDHs nanostructure was confirmed by advanced characterization techniques and the release profile of cefepime was analysed with the respect to pH of the simulated media.

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