73 research outputs found
Visualization 1: Lock-in-detection-free line-scan stimulated Raman scattering microscopy for near video-rate Raman imaging
SRS video imaging on 1.0 µm PMMA beads acquired during Brownian motion in water. Originally published in Optics Letters on 01 September 2016 (ol-41-17-3960
Efficient and highly selective cyclization induced by Lewis acid to generate 2-hydroxyl-α-cyclogeraniol
<p>A cyclization reaction of the hydroxyl-protected geraniol epoxide induced by the different Lewis acids to generate 2-hydroxyl-α-cyclogeraniol has been explored. Compared with the previous methods, this method enhances the production and selectivity of this reaction without the consumption of a large amount of solvent. Also, the coordination of the metal with two oxygen atoms of hydroxyl groups might be crucial for the reaction is first addressed.</p
Visualization 2: Optical diagnosis and characterization of dental caries with polarization-resolved hyperspectral stimulated Raman scattering microscopy
3-D colocalized multimodal nonlinear microscopic images of dental caries Originally published in Biomedical Optics Express on 01 April 2016 (boe-7-4-1284
Visualization 1: Optical diagnosis and characterization of dental caries with polarization-resolved hyperspectral stimulated Raman scattering microscopy
3-D colocalized multimodal nonlinear microscopic images of DEJ in the tooth Originally published in Biomedical Optics Express on 01 April 2016 (boe-7-4-1284
Model Emulsions Stabilized with Nonionic Surfactants: Structure and Rheology Across Catastrophic Phase Inversion
The catastrophic
phase inversion process of model emulsions
(water/Span
80-Tween 80/heptane) from oil-in-water to water-in-oil emulsion was
investigated. During this process, the phase inversion of the emulsion
was monitored through Fourier transform infrared spectroscopy (FT-IR).
In emulsions without NaCl, oil-in-water gel emulsions are formed prior
to phase inversion. As the HLB value increases, the oil volume fraction
required for phase inversion becomes higher. Polydisperse distribution
of the gel emulsion is observed from microscope optical images. The
Turbiscan Lab stability analyzer indicates that O/W gel emulsions
before the phase inversion has good stability at 50 °C. Rheological
measurements reveal that emulsions exhibit non-Newtonian behavior.
The viscosity of the gel emulsions increases significantly prior to
phase inversion. As the oil volume fraction increases, the storage
modulus and loss modulus of the gel emulsion increase to a maximum,
at which catastrophic phase inversion occurs. In emulsions with NaCl,
there is no oil-in-water gel emulsion formed before phase inversion.
The physicochemical properties of the emulsion play a crucial role
in whether gel emulsions are produced during catastrophic phase inversion.
These gel emulsions have the potential to diversify the applications
in crude oil extraction, drug delivery systems, packaging materials,
and other fields
Microwave Assisted Tandem Heck–Sonogashira Reactions of <i>N,N</i>-Di-Boc-Protected 6‑Amino-5-iodo-2-methyl Pyrimidin-4-ol in An Efficient Approach to Functionalized Pyrido[2,3‑<i>d</i>]Pyrimidines
A microwave
assisted tandem Heck–Sonogashira cross-coupling
reaction between 6-<i>N,N</i>-di-Boc-amino-5-iodo-2-methyl
pyrimidin-4-ol and various aryl alkynyl substrates has been developed.
This process generates novel 5-enynyl substituted pyrimidines, which
can be transformed to novel functionalized pyridoÂ[2,3-<i>d</i>]Âpyrimidines by way of a silver catalyzed cyclization reaction
Enterovirus detection in water vs. shellfish at 9 sampling locations.
<p>Enterovirus detection in water vs. shellfish at 9 sampling locations.</p
PCR Condition brackets included in optimization assay.
a<p>40-50°C was included if reported T<sub>anneal</sub> in literature was <50°C.</p
Enterovirus detection in Hawaiian environmental waters.
a<p>See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0032442#pone-0032442-g001" target="_blank">Figure 1</a>.</p
Environmental sampling sites around the island of O’ahu, Hawaii.
<p>Environmental sampling sites around the island of O’ahu, Hawaii.</p
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