A new method for preparing magnetic iron oxide nanoparticles coated by organic dye-doped silica shell was developed in this article. Iron oxide nanoparticles were first coated with dye-impregnated silica shell by the hydrolysis of hexadecyltrimethoxysilane (HTMOS) which produced a hydrophobic core for the entrapment of organic dye molecules. Then, the particles were coated with a hydrophilic sh...

STATEMENT OF PROBLEM Hemostatic agents may affect the micro-leakage of different adhesive systems. Also, chlorhexidine has shown positive effects on micro-leakage. However, their interaction effect has not been reported yet. OBJECTIVES To evaluate the effect of contamination with a hemostatic agent on micro-leakage of total- and self-etching adhesive systems and the effect of chlorhexidine ap...

Bulky hydrophobic counterions (weakly coordinating anions) can insulate ionic dyes against aggregation-caused quenching (ACQ) and enable preparation of highly fluorescent dye-loaded nanoparticles (NPs) for bioimaging, biosensing light harvesting. Here, we introduce a family anions based on fluorinated C-acyl barbiturates with delocalized negative charge bulky non-polar groups. Similarly to tetr...

INTRODUCTION There are several methods for evaluating microleakage in dentistry, for example dye or bacterial leakage, electro-chemical methods, radioisotope labeling and fluid filtration. The purpose of this study was to assemble the fluid filtration system for quantitative evaluation of microleakage in dental materials. MATERIALS AND METHODS The roots were connected to a tube filled with an...

In this issue of the Journal, the study by KAGEYAMA et al. [1] examines the role of endogenous nitric oxide in Evans blue dye leakage from the airway microvasculature induced by inflammatory mediators that may be relevant to asthma (substance P, leukotriene D4 (LTD4) and histamine). The authors demonstrate that endogenous nitric oxide (NO) plays an important role in the increased leakage of Eva...

Acute transient hypertension by norepinephrine was loaded to stroke-resistant (SHRSR), stroke-prone (SHRSP), and normotensive Wistar Kyoto (WK) rats. (SHRSP were most sensitive to norepinephrine in young pre-hypertensive group.) Its effects on cerebral small vessels were studied using Evans Blue to detect the increase of vascular permeability. Severe macroscopic dye-leakages were observed in th...

Synaptic transmission is achieved by exocytosis of small, synaptic vesicles containing neurotransmitters across the plasma membrane. Here, we use a DNA-tethered freestanding bilayer as a target architecture that allows observation of content transfer of individual vesicles across the tethered planar bilayer. Tethering and fusion are mediated by hybridization of complementary DNA-lipid conjugate...