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This paper focuses on the measurement of the permittivity of dimethyl sulfoxide (DMSO)–water (H2O) mixture solutions, at 2.45 GHz by using a resonant cavity perturbation method. A specific phenomenon was found, in that the imaginary part of the permittivity for the mixture solution was larger than the imaginary part for each component. Theoretical calculation indicated that the reason for that phenomenon was that the high frequency friction of the mixture was larger than that of each component. When comparing the theoretical results with the experimental data, it was found that the classical Debye equation must be modified in order to calculate the complex permittivity. [ABSTRACT FROM AUTHOR]

Abstract: A theoretical method for studying the inter-relation between electronic and molecular structure has been proposed based on the complete energy matrices for a d3 configuration ion in a tetragonal ligand-field. By means of this method, the local structure for Cr3+ ion doped in oxides TiO2 (anatase) and MgO has been determined. The calculated results indicate that the local structure of the (CrO6)9− cluster in TiO2:Cr3+ and MgO:Cr3+ systems exists as a compressed distortion relative to the regular octahedron. Meanwhile, the dependence of the EPR zero-field splitting parameter D on the local structure parameter ΔR (ΔR=R 1−R 2) has been revealed. In addition, the relation between the EPR g-factors and the orbit reduction factor k has been discussed for the two systems, suggesting that the orbit reduction factor k is very important to understand the EPR g-factors. [Copyright &y& Elsevier]

Abstract: A theoretical method for studying the inter-relation between the local structure and EPR spectra is established by diagonalizing the complete energy matrices. For [M(H2O)6]XCl6:Mn2+ (M=Zn, Mg, Cd, Ca; X=Pt, Sn) systems, the calculated results demonstrate that the local structures around the octahedral Mn2+ centers in the doped systems are very similar despite of the host crystals being different. Furthermore, it is shown that the EPR zero-field parameter D depends simultaneously on the local structure parameters R and θ while (a − F) depends mainly on R, whether the doped systems are at liquid-nitrogen temperature or room temperature. [Copyright &y& Elsevier]

The CatSper channel is known as one of the most important Ca²⁺ channels on the cell membrane of mammalian sperm and plays a key role in the motility, hyperactivation and fertilization function of sperm. The CatSper protein, expressed exclusively in the principal piece of the sperm tail, is composed of CatSper1-4 and 5 auxiliary unitsβ,γ,δ and ε, and has an essential part in the functional and structural domains of Ca²⁺as well as in the spatiotemporal regulation of the P-Tyr protein, sperm hyperactivation, efficient sperm migration in the oviduct, egg penetration, and normal fertility. Recent studies show that functional deficiency of CatSper seriously affects sperm function,and the loss of any one of its 9 subunits may lead to male reproductive dysfunction. This paper outlines recent advances in the studies of the CatSperprotein, focusing on its expression, location, structure, and regulation,as well as itsinfluence on sperm hyperactivation and male reproduction.

Objective: To analyze the opportunity and condition of aeromedical transportation in critically burn patients., Methods: Eighteen severely burn patients were operated by aeromedical transportation. Among them, four patients were transported in the shock stage and fourteen patients were transported after shock stage. Some aspects of treatment were introduced including escharectomy,clinical index, equipment of medicine, and so on. The transportation card and abstract of case file were recorded carefully before aeromedical transportation. When there were over 2 patients, those with more severe burns received the treatment in the priority., Results: Each aeromedical transportation airplane carried 1 to 6 cases, and flies 420 to 2 500 km for 1.5 to 3. 5 hours. The patients were safely arrived at destination. Except one died for multiple organ failure, others were cured during further treatment., Conclusion: Provide that the conditions were permissive and preparation were adequate, it is safe to carry out aeromedical transportation during shock stage.

Objective: To detect the characteristic chromosomal changes in Chinese children with infantile autism., Methods: Chromosome aberrations in 68 cases of infantile autism were analyzed by high-resolution G-banding and fluorescence in situ hybridization (FISH) with bacterial artificial chromosome (BAC) clones., Results: Chromosomal changes were detected in 4 cases by high-resolution G-banding: one case with t(4;6)(q23-24;p21), one case with longer p arm of chromosome 21 (21p+), and two cases with pericentric inversion of chromosome 9 (inv(9)) which was confirmed by C-banding. BAC FISH analysis was performed to confirm these observations and changes in chromosomes 2, 7 and 15, which are often found in autistic children. There could exist the translocation of t(4;6) (q25-26;p21.1). Chromosome changes often reported previously in chromosomes 2, 7 and 15 were not detected in this study. Inv(9) and 21p+ were not confirmed with present BAC clones., Conclusion: Chromosomal changes were detected in four cases of infantile autism, with a detectability of 5.9% , far lower than that (10% to 48%) reported in literature. The breakpoint of translocation could be detected more accurately using BAC FISH method.

Objective: To explore changes in endothelin-1 (ET-1) and calcitonin gene-related peptide (CGRP) in the myocardium after severe burn and delayed fluid resuscitation in rats at different altitudes., Methods: Two hundred and forty male Wistar rats were employed as the experimental models with full-thickness burn of 30% total body surface area (TBSA), and they were randomly divided into three groups: delayed fluid resuscitation group (DFR), immediate fluid resuscitation group (IFR) and control group (CG). Samples of myocardial tissue were harvested at 1 hour, 6 hours, 12 hours, 24 hours, 72 hours, 168 hours postburn respectively. The changes in ET-1 and CGRP contents were determined by means of radio immunological assay., Results: (1)The contents of ET-1 and CGRP in DFR group tended to increase at 6 hours after burn, ET-1 was higher 2.8, 3.6 fold, while CGRP higher by 2.2, 1.5 fold (P<0.01), compared with that of CG respectively at 1517 m and 3840 m. The tendency of rise of ET-1 and CGRP was significantly less conspicuous in IFR group than that in DFR group. (2)The contents of ET-1 in DFR group tended to increase at 6 hours and reached the peak at 24 hours after burn at 1517 m, while the levels reached the peak at 72 hours after burn at 3840 m, and the change lasted for 168 hours in DFR group. The contents of CGRP increased significantly at 6 hours and reached the peak at 12 hours at 1517 m, while they reached the peak at 72 hours after burn at 3840 m., Conclusion: The myocardial contents of ET-1 tend to increase significantly with the elevation of altitude after severe burn in rats, but the contents of CGRP increased lagged behind. The result show that the higher the altitude is, the more the exhaustion of protective agents of the myocardium, thus resulting in changes in ET-1/CGRP.