Results 41 to 50 of about 444,692 (336)

Determination of Alkaloid Contents in Various Tissues of Coptis Chinensis Franch. by Reversed Phase-High Performance Liquid Chromatography and Ultraviolet Spectrophotometry.

open access: yesJournal of Chromatographic Science, 2017
A simple and intuitive method for optimizing the chemical constituents of Coptis Chinensis Franch. is important to assess its quality and clinical efficacy.
Yan-fang Yang   +5 more
semanticscholar   +1 more source

Reddened, Redshifted, or Intrinsically Red? Understanding Near-Ultraviolet Colors of Type Ia Supernovae [PDF]

open access: yes, 2017
Understanding the intrinsic colors of Type Ia supernovae (SNe Ia) is important to their use as cosmological standard candles. Understanding the effects of reddening and redshift on the observed colors are complicated and dependent on the intrinsic ...
Brown, Peter J.   +3 more
core   +3 more sources

PENETAPAN KADAR ASAM BENZOAT DALAM BEBERAPA MERK DAGANG MINUMAN RINGAN SECARA SPEKTROFOTOMETRI ULTRAVIOLET

open access: yesPharmaciana, 2012
Benzoic acid is one of the synthetic preservatives, work effectively at pH 2.5 to 4.0, therefore it is widely used in acidic food or drink. This study aims to determine benzoic acid content in some soft drink products, their conformity with Permenkes ...
Wahyu Irna Wati, Any Guntarti
doaj   +1 more source

Green Synthesis of Highly Luminescent Carbon Quantum Dots from Lemon Juice

open access: yesJournal of Nanotechnology, 2019
Highly luminescent carbon dots (C-dots) were synthesized by the one-pot simple hydrothermal method directly from lemon juice using different temperatures, time, aging of precursors, and diluted solvents to control the luminescence of C‐dots. The obtained
Bui Thi Hoan   +2 more
doaj   +1 more source

Dissolution test for glibenclamide tablets

open access: yesQuímica Nova, 2007
The aim of this work is to develop and validate a dissolution test for glibenclamide tablets. Optimal conditions to carry out the dissolution test are 500 mL of phosphate buffer at pH 8.0, paddles at 75 rpm stirring speed, time test set to 60 min and ...
Elisabeth Aparecida dos Santos Gianotto   +4 more
doaj   +1 more source

Determination of silicon in natural waters by spectrophotometry using modern methods of sample preparation

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2017
The main aim of the study is to develop modern methods of preparing natural water samples using ultrasound, ultraviolet radiationand photocatalytic systems for destruction of polysilicic acids and silicon complexes with humic substances to determine ...
Indira Abdumominovna Bekbulatova   +2 more
doaj   +2 more sources

Synthesis, Characterization and Antimicrobial Activities of Copper-Tea Leaves (Camellia Sinensis) Extract Nanoparticles.

open access: yesJournal of Nigerian Society of Physical Sciences, 2022
Nanoparticles, NPs synthesis has gained attention recently due to their ease of preparation (especially green synthesis), availability of raw materials and usefulness. The green synthesis of copper nanoparticles (CuNPs) was done using Tea leaves extract-
Boniface Tersoo Iorhuna   +5 more
doaj   +1 more source

Optimizing Angiopep‐2 Density on Polymeric Nanoparticles for Enhanced Blood–Brain Barrier Penetration and Glioblastoma Targeting: Insights From In Vitro and In Vivo Experiments

open access: yesAdvanced Functional Materials, EarlyView.
The Angiopep‐2 peptide density on polymeric nanoparticles significantly impacts blood–brain barrier (BBB) penetration. This study explores this nuanced relationship using various in vitro models and in vivo assays, revealing that dynamic models better predict BBB penetration.
Weisen Zhang   +9 more
wiley   +1 more source

RECENT DEVELOPMENT IN ULTRAVIOLET SPECTROPHOTOMETRY THROUGH THE LAST DECADE (2006-2016): A REVIEW

open access: yes, 2016
Several techniques have been proposed for treatment of spectrophotometric data, with the objective of extracting the largest amount of analytical information from spectra composed of unresolved bands.
H. Lotfy, S. Saleh
semanticscholar   +1 more source

Interpreting Flux from Broadband Photometry [PDF]

open access: yes, 2016
We discuss the transformation of observed photometry into flux for the creation of spectral energy distributions and the computation of bolometric luminosities.
Breeveld, Alice   +3 more
core   +4 more sources

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