Formation Mechanism of Alkali Halide Cluster Ion During the Electrospray Ionization

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Studying Unusual Molecular Aggregation of Quinocyanine in the Charged Droplets

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Scavenger receptor, CL-P1 is mainly involved in fungal Phagocytosis in human vascular endothelial cells

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ARADOS: Asian network for radiation dosimetry

The Asian Radiation Dosimetry Group (ARADOS) was established in 2015 with the aim of promoting collaborations among Asian countries on relevant activities in the field of radiation dosimetry. Since then, annual meetings have been organized by the Republic of Korea, China and Japan in order to share information on the researches done in each country. In past annual meetings, members have discussed the missions and structure of ARADOS, and several collaborative projects were also launched by working groups of ARADOS. This paper introduces an outline of ARADOS and discuss its recent activities

Feasibility of low-dose CT protocols for evaluating the sinonasal cavity and reducing radiation exposure in dogs

© 2022 American College of Veterinary RadiologyWith the increasing use of radiation therapy for treatment of canine sinonasal neoplasia, there is a need for developing low-dose CT protocols to help minimize radiation exposure. The purpose of this study was to assess the trade-off between image quality and reduced radiation exposure of a low-dose CT technique in the canine sinonasal cavity. In this prospective, experimental study, CT images of the sinonasal cavities from 10 normal Beagles were acquired using high-dose (130 kVp) or low-dose (110 kVp, 80 kVp) protocol. Radiation dose and image quality were compared. Radiation exposure measured by the volume-weighted CT dose index and dose–length product was reduced by 36% at 110 kVp and 74% at 80 kVp respectively, compared to the corresponding values at 130 kVp (P = 0.000). Low-dose protocol resulted in higher image noise and reduced signal-to-noise ratio and contrast-to-noise ratio than 130 kVp in most evaluated regions of interest (P < 0.05). CT numbers of the contrast-enhanced structures were highest at 80 kVp (P = 0.000). Conspicuity of most sinonasal structures was similar for high dose and both lower dose protocols. The results of this study indicate that 80 or 110 kVp can be used for sinonasal CT examinations to reduce radiation exposure to the patient without compromising image quality.N

Trapping Alkali Halide Cluster Ions Inside the Cucurbit[7]uril Cavity

© 2022 American Chemical Society.In this study, the distinctive behavior of cucurbit[n]uril (CB[n]), which captures a variety of alkali halide clusters inside the cavity during the droplet evaporation, has been investigated by using ion mobility spectrometry-mass spectrometry. Complexes of CB[7] with various alkali chloride cluster cations or anions generated during the electrospray ionization were studied, and their collision cross-section (CCS) values were obtained to determine whether these clusters were trapped inside the cavity or not. It was found that the clusters smaller than a specific critical size were trapped inside the CB[7] cavity in the gas phase, although trapping of alkali halide clusters at the given concentration is supposed to be unfavorable in solution. We suggest that the rapid solvent evaporation rapidly increases ion concentrations and subsequently forms alkali-chloride contact ion pairs; therefore, it may provide a specific environment to enable the formation of the inclusion complexes.11Nsciescopu