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关键词： 废旧纺织品   回收再生   混纺织物分离   高值化利用  

摘要： 针对废旧纺织品年产量大、资源回收率低等问题,归纳总结了主流织物(棉、涤纶、锦纶)及混纺织物的回收技术,重点分析对比了物理法、化学法和生物法等回收方法,并探讨了混纺织物的分离和高值化利用。同时指出未来需要推进废旧纺织品回收新技术产业化、突破智能分拣与组分高效分离技术瓶颈、推动再生技术高效化与产品高值化。

关键词： 非织造土工织物   孔径分布   孔隙度   有效孔径   低场核磁共振技术  

摘要： 为精确测定针刺非织造土工织物有效孔径,运用湿筛法和低场核磁共振技术开展了试验研究,分别绘制了累积百分率与孔径尺寸之间的关系曲线,得到非织造土工织物的有效孔径值,并进行了对比分析;利用低场核磁共振成像技术与Python程序像素点识别相结合的方法验证了低场核磁共振测量技术成果的可靠性。结果表明:以氢原子为探针的低场核磁共振测量技术能够精确测定非织造土工织物的有效孔径;低场核磁共振成像技术和Python程序像素点识别相结合的方法可验证低场核磁共振技术测定非织造土工织物有效孔径的准确性;低场核磁共振测量技术可避免湿筛法的缺点,提高有效孔径测定成果的准确性。

关键词： 微胶囊技术   纺织品   染整加工   功能整理   智能响应  

摘要： 微胶囊技术通过其特有的壳核结构隔绝外界环境,既能提升芯材稳定性、抑制劣变损失,还能实现芯材的精准控释。凭借这些突出优势,其在纺织染整行业的功能升级与技术创新中占据了重要地位。文章首先明确了微胶囊的核心定义与分类,介绍了其在纺织染整加工过程中常见的加工方式,例如印花法、染色法、纺丝法以及微胶囊原位组装等;重点阐述了微胶囊在芳香缓释、相变调温、抗菌防护和智能响应等领域的应用成果;最后指出微胶囊技术现存挑战并对未来发展方向作出了展望。

关键词： Surface property   Color   Polymethyl methacrylate   Computer-aided design   Denture cleansers  

摘要： This in vitro pilot study evaluated the effects of two professional cleansing protocols on surface roughness and color stability of various resins for complete dentures.

关键词： Biocompatibility   CAD-CAM dentistry   Compressive strength   Composite resin   PEEK  

摘要： Polyetheretherketone (PEEK) is a high-performance thermoplastic polymer that is currently being utilized in the dental field due to its desirable mechanical characteristics, biocompatibility, and ease of integration into digital CAD-CAM processes. Despite the esthetic and esthetic benefits of composite resins in Class II inlays, mechanical performance in high-stress posterior restorations continues to be a clinical issue with the material. Although other research has been conducted to utilize PEEK in different dental treatment procedures, there are no direct comparative studies dealing specifically with the compressive strength of Class II dental restorations using CAD-CAM developed PEEK inlays as compared to indirect composite inlays. This study aimed to compare the compressive strength of PEEK and composite resin when used as Class II inlays and evaluate PEEK's suitability as an alternative restorative material. Thirty-four human premolars extracted for orthodontic reasons and randomly allocated to two groups (n = 17). Group A was provided with CAD-CAM-produced PEEK inlays, and Group B was restored with inlays made of an indirect composite. Fracture load testing of all specimens was done through a universal testing machine. An independent t -test was used to statistically analyze the compressive strength values. The PEEK group showed a mean compressive strength value of 381.88 N compared to 266.67 N in the composite group, and the p-value was below 0.001, which was a statistically significant difference. PEEK inlays proved to have better compressive strength than composite resin inlays, which implies that PEEK is a prospective Class II restorative material in stress-bearing posterior areas. Its clinical performance over the long term and in more applications should be the subject of future research.

关键词： climate model   critical bulk Richardson number   PBL height   PBL parameterization   precipitation  

摘要： In this study, two planetary boundary layer (PBL) schemes in the National Center for Atmospheric Research Community Atmosphere Model version 5 (NCAR-CAM5) have been evaluated over India and its adjacent regions during winter (DJF), pre-monsoon (MAM), monsoon (JJA), and post-monsoon (SON) seasons. Most of the PBL schemes are designed to compute vertical mixing considering two sources of turbulence, namely buoyancy and shear. Here, the two PBL schemes, namely the HB (Holtslag and Boville, 1993) and UW (University of Washington scheme;Bretherton and Park, 2009) schemes, are considered for the evaluation. One is based on the non-local approach, while the other employs a 1st-order local TKE (turbulent kinetic energy) closure approach, respectively. The evaluation reveals that the UW PBL is preferable for precipitation throughout the winter and monsoon seasons. In contrast, HB PBL demonstrates better performance during the pre-monsoon and post-monsoon seasons over the whole study domain (20S-40N, 40E-140E). For 2-m temperature, UW PBL is beneficial in NCAR-CAM5 during all four seasons. In the case of surface and upper air wind patterns, both schemes are comparable with respect to observed monsoon flow and location of jets, with a slight difference in magnitude. Notably, over the Indian land and associated different climatic zones, significant differences have been observed between simulated variables utilising the two schemes. The performance is strongly dependent on the considered season and region, and a scheme should judiciously be chosen for the simulation. Furthermore, the sensitivity of the HB PBL scheme to the critical bulk Richardson number (Ri(cr)) suggests that the simulated variables are highly sensitive to the utilised value of Ri(cr). The mean planetary boundary layer height and total precipitation averaged over the whole domain increase linearly with increasing Ri(cr) during all four seasons. The surface sensible (latent) heat flux decreases (increases) as R

关键词： Atrial Fibrillation   Coronary artery disease  

摘要： Objective The impact of off-label underdosing of direct oral anticoagulants (DOACs) on clinical outcomes in patients with atrial fibrillation (AF) and stable coronary artery disease (CAD) remains unclear. Methods The EPIC-CAD trial (Edoxaban vs Edoxaban with antiPlatelet agent In patients with atrial fibrillation and Chronic stable Coronary Artery Disease) randomised patients with AF and stable CAD to receive either edoxaban monotherapy or dual antithrombotic therapy (edoxaban plus single antiplatelet agent). Off-label underdosing was defined as low-dose edoxaban (30 mg once daily) without standard criteria for dose reduction. The primary outcome was a composite of death, myocardial infarction, stroke, systemic embolism, unplanned revascularisation and major or clinically relevant non-major bleeding at 12 months. Results Among the 1040 randomised patients, 694 patients (66.7%) without dose-reduction criteria were included;of whom, 121 patients (17.4%) received edoxaban underdosing. At 12 months, the incidence of primary outcome was similar between standard-dose and under-dose edoxaban groups (10.5% vs 9.2%, adjusted HR 0.77, 95% CI 0.39 to 1.54). There was no significant difference in major ischaemic events (1.4% vs 1.7%, HR 1.14, 95% CI 0.22 to 5.91) and major or clinically relevant non-major bleeding (9.0% vs 8.4%, HR 0.87, 95% CI 0.42 to 1.78). Regardless of edoxaban underdosing, edoxaban monotherapy was associated with lower risk of primary net-clinical outcomes and bleeding compared with dual antithrombotic therapy. Conclusions In patients with AF and stable CAD, there was no significant difference in the rate of primary outcome between off-label underdose and standard-dose edoxaban. The benefit of edoxaban monotherapy over dual antithrombotic therapy was consistent regardless of edoxaban underdosing. However, given the analyses were underpowered and the CI was wide, the results cannot be considered clinically directive. Trial registration number URL: https://w

关键词： Cad/Cam   Composite block   Inlay   Overlay   Indirect restoration  

摘要： The objective of this study was to assess the effect of different designs and depths of cusp reduction on fracture resistance of maxillary permanent premolars restored with CAD/CAM composite restorations. A total of 42 sound maxillary premolars were used. Standardized MOD cavities were prepared in all specimens. Teeth were randomly divided according to form of cusp reduction into three main groups (n = 14);G1:MOD cavities restored with inlays with no cusp reduction, G2:MOD cavities restored with overlays with buccal and palatal anatomical cusps reduction, G3;MOD cavities restored with overlays with buccal and palatal flat cusps reduction. Groups 2 and 3 were further sub-divided into two sub-groups (n = 7) according to amount of cusp reduction either 1.5 mm or 2.5 mm. All groups were restored by CAD/CAM resin composite indirect restorations and cemented by adhesive resin cement. Thermocycling was done for all specimens. Fracture resistance was tested by universal testing machine and failure modes were examined by stereomicroscope. Statistically analysis was done for all data. Fracture resistance showed significant differences among the experimental groups (p < 0.001) with the highest fracture resistance for overlays with 2.5 mm of anatomical reduction. Regarding the modes of failure, there were no significant differences between experimental groups (p = 0.489). The fracture resistance of the composite CAD/CAM fabricated restorations is highly influenced by the restoration/prep design. The overlay design with anatomical cusps reduction of 2.5 mm can reinforce maxillary premolars teeth with MOD cavities.

关键词： CAD/CAM   Fiber-reinforced composite material   Indirect composite material   Shear bond strength  

摘要： This study aimed to evaluate the effect of different surface treatments and artificial aging on the shear bond strength between a CAD/CAM glass fiber-reinforced composite (FRC) block and a veneering indirect composite material. Four surface treatments-no surface treatment (NT), airborne-particle abrasion (AB), tribochemical silica coating (ROC), and hydrofluoric acid etching (HF)-were assessed with and without silane application. Specimens were subjected to thermocycling and mechanical loading to simulate aging. Shear bond strength was measured, and failure modes were analyzed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The AB group exhibited the highest bond strength without silane application. The ROC group combined with silane yielded the highest bond strength, particularly after thermal cycling. Mechanical loading reduced the effectiveness of silane application. These findings indicate that tribochemical silica coating followed by silanization provides a superior and durable bond between FRC blocks and veneering indirect composite materials.