نتایج جستجو برای: UV-Vis spectroscopy

تعداد نتایج: 239353  

Journal: :organic chemistry research 2015
hossein eshghi mohammad rahimizadeh nazanin noroozi-shad hossein sabet-sarvestania

a novel podand based anion receptor bearing benzimidazole motifs as recognition sites was designed and synthesized by reaction of 1,7-bis(2'-methylbenzoate)-1,4,7-trioxaheptane and phenylenediamine. the binding properties of anionic guest with this receptor were studied using uv-vis and fluorescence spectroscopy. these studies revealed that this receptor exhibit selective recognition towards f- ...

Journal: :international journal of nanoscience and nanotechnology 2011
m. e. khosroshahi l. ghazanfari

the main objective of this research was to synthesize and characterize gold-coated fe3o4 /sio2 nanoshells for clinical applications. magnetite nanoparticles (nps) were prepared via co-precipitation. the results showed that smaller particles can be synthesized by decreasing the naoh concentration, which in our case this corresponded to 35 nm by using 0.9 m of naoh at 750 rpm. the nps were then m...

Journal: :Journal of the Japan Society of Colour Material 2005

Journal: :Physical Sciences Reviews 2018

Journal: :International Journal of Astrobiology 2006

Journal: :analytical and bioanalytical chemistry research 2015
priyanka bose suddhasattya dey souvik basak shreya shah anjan de

the present study describes a simple, accurate, precise and cost effective uv-vis spectroscopic and rp-hplc method for the estimation of ibandronate sodium (ibn). the determination of ibandronate sodium (ibn) was performed by both uv and rp-hplc method using 215 nm as the determination wavelength. the drug was dissolved in naoh solution (0.1n naoh) for estimation in uv and in distilled water fo...

2007
C. D. Fernandes D. Johnson Monica M. Grady

NASA’s Stardust mission flew through the coma of comet Wild 2 in January 2004, capturing dust grains as it did so. The grains were returned safely to Earth in January 2006, and are in the process of being distributed to investigators. As members of the Spectroscopy Preliminary Examination Team, we are preparing to analyse Stardust grains. Our contribution is to measure the spectrum of the grain...

Journal: :international journal of nano dimension 0
q. wang department of chemical engineering, maoming vocational and technical college, maoming, china, 525000. ren-feng mao department of chemical engineering, maoming vocational and technical college, maoming, china, 525000.

nanotechnology has been advanced since the last decades. among all nanomaterials that have been developed, nanosilver is the most frequently used nanoparticles. its release into natural water bodies is inevitable due to its broad applications. nanosilver (nag) was prepared via tollens method using. the morphology, size distribution and average size of the obtained nag was characterized using tr...

Journal: :analytical and bioanalytical chemistry research 0
morteza akhond department of chemistry, shiraz university, shiraz, 71454, iran ghodratollah absalan professor massoumi laboratory, department of chemistry, faculty of sciences, shiraz university, shiraz 71454, iran elmira rafatmah department of chemistry, shiraz university, shiraz, 71454, iran

the adsorption characteristics of riboflavin onto silver-deposited iron oxide magnetic nanoparticles (ag/fe3o4) have been described. characterization of the synthesized ag/fe3o4 nanoparticles was achieved by ftir spectra, tem image and xrd pattern. the influence of several experimental parameters such as nanoparticles dosage, ph of the sample solution, different orientations of the riboflavin m...

2012
Malgorzata Wojtoniszak Diana Dolat Antoni Morawski Ewa Mijowska

Here we present a method to produce TiO2 nanocrystals coated by thin layer of graphitic carbon. The coating process was prepared via chemical vapor deposition (CVD) with acetylene used as a carbon feedstock with TiO2 used as a substrate. Different temperatures (400°C and 500°C) and times (10, 20, and 60 s) of reaction were explored. The prepared nanocomposites were investigated by means of tran...

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