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Magnesium methacrylate (MgMA)/ hydrogenated nitrile rubber (HNBR) composites were prepared by blending MgMA with HNBR, and the effects of MgMA amount on mechanical properties of HNBR at high temperature and after immersion in drilling fluid were investigated. The results showed that under the combined action of high temperature and drilling fluid, the comprehensive performance of MgMA/HNBR composite was improved most significantly with higher tensile strength, elongation at break and tear strength, and the best thermal-oxydative aging resistance, when the amount of MgMA was 8 phr (mass).

To investigate the feasibility and efficacy of combining ultrasound-guided sharp needle technique with percutaneous transluminal angioplasty (PTA) for treating outflow stenosis or dysfunction in arteriovenous fistula (AVF) among hemodialysis patients. From October 2021 to March 2023, patients with occluded or malfunctional fistula veins not amenable to regularly angioplasty were retrospectively enrolled in the study. They underwent ultrasound-guided sharp needle intervention followed by PTA. Data on the location and length between the two veins, technical success, clinical outcomes, and complications were collected. Patency rates post-angioplasty were calculated through Kaplan-Meier analysis. A total of 23 patients were included. The mean length of the reconstructed extraluminal segment was 3.18 cm. The sharp needle opening was performed on the basilic vein (60.9%), brachial vein (26.1%), or upper arm cephalic vein (13%) to create outflow channels. Postoperatively, all cases presented with mild subcutaneous hematomas around the tunneling site and minor diffuse bleeding. The immediate patency rate for the internal fistulas was 100%, with 3-month, 6-month, and 12-month patency rates at 91.3%, 78.3%, and 43.5%, respectively. Sharp needle technology merged with PTA presents an effective and secure minimally invasive method for reconstructing the outflow tract, offering a new solution for recanalizing high-pressure or occluded fistulas. [ABSTRACT FROM AUTHOR]

Herein we report on circularly polarized luminescence (CPL) emission originating from supramolecular chirality of organic microcrystals with a |glum| value up to 0.11. The microcrystals were prepared from highly emissive difluoroboron β‐diketonate (BF2dbk) dyes R‐1 or S‐1 with chiral binaphthol (BINOL) skeletons. R‐1 and S‐1 exhibit undetectable CPL signals in solution but manifest intense CPL emission in their chiral microcrystals. The chiral superstructures induced by BINOL skeletons were confirmed by single‐crystal XRD analysis. Spectral analysis and theoretical calculations indicate that intermolecular electronic coupling, mediated by the asymmetric stacking in the chiral superstructures, effectively alters excited‐state electronic structures and facilitates electron transitions perpendicular to BF2bdk planes. The coupling increases cosθμ,m from 0.05 (monomer) to 0.86 (tetramer) and triggers intense optical activity of BF2bdk. The results demonstrate that optical activity of chromophores within assemblies can be regulated by both orientation and extent of intermolecular electronic couplings. [ABSTRACT FROM AUTHOR]

A retrospective analysis of birth data hospital-based obtained from 14 monitoring areas in the Huaihe River Basin from 2009 to 2019 was conducted. Trend in the total prevalence of birth defects (BDs) and subgroups were analyzed using the Joinpoint Regression model. The incidence of BDs increased gradually from 118.87 per 10,000 in 2009 to 241.18 per 10,000 in 2019 (AAPC = 5.91, P < 0.001). Congenital heart diseases were the most common subtype of BDs. The proportion of maternal age younger than 25 decreased but the age 25–40 years increased significantly (AAPC<20=-5.58; AAPC20–24=-6.38; AAPC25–29 = 5.15; AAPC30–35 = 7.07; AAPC35–40 = 8.27; All P < 0.05). Compared with the one-child policy period, the risk of BDs was greater for groups among maternal age younger than 40 years during the partial and universal two-child policy period (P < 0.001). The incidence of BDs and the proportion of women with advanced maternal age in Huaihe River Basin is increasing. There was an interaction between changes in birth policy and the mother's age on the risk of BDs. [ABSTRACT FROM AUTHOR]

Objective To analyze the hospitalization cost structure of patients in the rehabilitation department of a third-class A hospital in Sichuan province, and to provide reference and data support for effectively controlling the hospitalization cost and reducing the economic burden of rehabilitation patients. Methods The hospital information system was used to collect the hospitalization expenses of all patients in the rehabilitation department of the hospital from 2013 to 2021, and the influencing factors and cost structure of the rehabilitation department of the hospital were analyzed through the grey correlation model and structural change analysis. Results From the perspective of inpatient costs of rehabilitation patients, they were relatively stable before 2017, and increased year by year after 2017. The average cost per time in 2020 and 2021 may be reduced due to the impact of COVID-19. From the perspective of correlation, the four indicators of treatment cost (0. 887), material cost (0.695), western medicine cost (0.688) and examination cost (0.686) were the main influencing factors of the average hospitalization cost of the rehabilitation department of the hospital. The correlation degree of other related factors, such as oxygen transfusion cost (0.653), anesthesia cost (0.651) and others (0.649), was relatively low. From the perspective of structural change value and degree of change, the first three places of positive change were inspection cost (4. 44), material cost (3. 74) and test cost (2. 59), and the first three places of negative absolute change were treatment cost (-6. 42), western medicine cost (-4.06) and bed cost (-1.41). Conclusion In the context of the deepening of aging, the cost of rehabilitation treatment is increasing year by year. The cost of treatment, materials and western medicine are still the main factors that affect the average hospitalization cost. In addition, the impact of examination and laboratory costs cannot be ignored. The composition of rehabilitation medical expenses should be optimized, the standardized and strict rehabilitation clinical path should be standardized, the value of labor force should be reasonably reflected, and the economic burden of patients should be effectively reduced. [ABSTRACT FROM AUTHOR]