Two-in-one sensor of refractive index and Raman scattering using hollow-core microstructured optical waveguides for colloid characterization.

Hollow-core microstructured optical waveguides (HC-MOW) have recently emerged in sensing technologies, including the gas and liquid detection for industrial as well as clinical applications. Antiresonant HC-MOW provide capabilities for applications in refractive index (RI) sensing, while the long optical path for analyte-light interaction in HC-MOW leads to increased sensitivity of sensor based on Raman scattering signal measurements. In this study, we developed a two-in-one sensor device using HC-MOW for RI and Raman scattering detection.

Solvent-Involved Synthesis of 5--Substituted 5-Chromeno[2,3-]pyridines.

Chromeno[2,3-]pyridines are substances demanded in medicinal and material chemistry. (pot, atom, and step economy) and in particular approaches are key green chemistry techniques that are applied for the synthesis of heterocyclic compounds. In this case, the approach was extended with 'component economy', as solvent was used also as reactant (solvent-involved reaction).

Multicomponent Synthesis of 2-(2,4-Diamino-3-cyano-5-chromeno[2,3-]pyridin-5-yl)malonic Acids in DMSO.

Dimethyl sulfoxide is a widely used solvent in organic synthesis and in the pharmaceutical industry because of its low cost, stability, and low toxicity. Multicomponent reactions are an advanced approach that has become an efficient, economical, and eco-friendly substitute for the conventional sequential multi-step synthesis of various biologically active compounds. This approach was adopted for the synthesis of previously unknown 2-(2,4-diamino-3-cyano-5-chromeno[2,3-]pyridin-5-yl)malonic acids via transformation of salicylaldehydes, malononitrile dimer, and malonic acid.

[Radio Frequency Electromagnetic Field Effect on the State of Na+/Ca2+ Exchange in the Isolated Rat Heart].

It has been shown that a single exposure to 171 MHz electromagnetic field with 180 V/m electric field strength and 0.04 mW/kg specific absorption rate significantly alters the Na+/Ca2+ exchange in the isolated rat heart. It is assumed that enhancement of the Na+/Ca2+ exchange towards removing Ca2+ from the cardiomyocytes electromagnetic field exposure is a result of Ca2+ extraction from the sarcoplasmic reticulum and the increase of its intracellular level.

Cyclotron production and radiochemical purification of (88,89)Zr via α-particle induced reactions on natural strontium.

The radionuclides (88)Zr and (89)Zr have been produced by cyclotron irradiation of (nat)SrO with 35 MeV α-particles at a beam current of 15 μA. The thick source production yield of (89)Zr is ~3.1 MBq μA(-1) h(-1).