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Objective To explore the application effect of holistic nursing mode based on responsibility system in quality nursing service of Central Sterile Supply Department. Methods Totally 229560 packs of medical instruments which were sterilized between August 2020 and August 2021 were selected as the control group, and the routine management mode was adopted. Another 218845 packs of medical instruments sterilized from September 2021 to September 2022 were selected as the observation group, and the holistic nursing model based on responsibility system was adopted. The incidence of defect package and unqualified rate of pretreatment were compared between two groups, and satisfaction of clinical medical staff was measured. Results The incidence of defective packages and the unqualified rate of pretreatment in the observation group were lower than those in the control group(P＜0. 01). Totally 56 medical staff were recruited for the questionnaire survey, and the score of satisfaction assessment after implementation of holistic nursing mode (observation group)was higher than that before implementation of holistic nursing mode(control group) (P＜0. 01). Conclusion The implementation of the holistic nursing model based on responsibility system can improve the quality of nursing service in the Central Sterile Supply Department. (目的 探讨责任制整体护理模式在消毒供应中心优质护理服务中的应用效果。方法 选取2020年8月—2021年8月医院消毒供应中心处理的229560个器械包作为对照组, 采用常规管理模式。选取2021年9月—2022年9月处理的218845个器械包为观察组, 采用责任制整体护理模式。比较两组器械缺陷包发生率、预处理不合格率, 调查责任制整体护理模式实施前(对照组)和实施后(观察组)临床医务人员满意度。结果 观察组缺陷包发生率和预处理不合格率低于对照组, 差异有统计学意义(P＜0. 01)。56名医务人员参与调查, 临床医务人员优质护理满意度评分观察组高于对照组, 差异有统计学意义(P＜0. 01)。结论 责任制整体护理模式可以提高消毒供应中心的护理服务质量。)

Two-dimensional molybdenum disulfide (2D MoS2) has great application prospects in the field of optoelectronic devices. Defect engineering is an effective way to regulate the electronic and optical properties of 2D MoS2. However, defect controlling on 2D materials remains a major challenge. Fluorine, as the most electronegative element, may cause many interesting phenomena after doping in 2D materials. So far, there have been no reports on the effect of fluoride ion (F− ion) irradiation on 2D material properties. In this paper, the monolayer MoS2 (ML-MoS2) synthesized by the chemical vapor deposition method was taken as the research object, and defects with controllable densities were produced by 30 keV F− ion irradiation, in which the defects were dominated by S vacancies. Based on Raman, photoluminescence, and x-ray photoelectron spectroscopy, it is shown that the ion irradiation-induced defects significantly affect the optoelectronic properties of MoS2. We also observed the p-doping of ML-MoS2, which is attributed to the introduction of F− ions and the electron transfer from MoS2 to O2 at defect adsorption sites. This study reveals that 2D materials could be effectively doped or compensated using irradiation technology, potentially fabricating novel 2D electrical devices through defect engineering. [ABSTRACT FROM AUTHOR]

In this article, we study extensions of conformal modules over Lie conformal algebras W (a , b , r) with three parameters a, b, r ∈ C , which contain the Virasoro Lie conformal algebra Vir, W (b) and W (a , b) as subalgebras. We obtain the existence conditions of extensions of nontrivial conformal modules over W (a , b , r) and give a complete classification of extensions of finite irreducible conformal modules of W (a , b , r) . [ABSTRACT FROM AUTHOR]

In this paper, by studying the maximal good subspaces, we determine the dual Lie coalgebras of the centerless twisted Heisenberg–Virasoro algebra. Based on this, we construct the dual Lie bialgebras structures of the twisted Heisenberg–Virasoro type. As by-products, four new infinite dimensional Lie algebras are obtained. [ABSTRACT FROM AUTHOR]

Molybdenum disulfide (MoS2), a very promising nonprecious catalyst with high hydrogen evolution reaction (HER) catalytic activity, has been extensively studied for its excellent properties. Nonmetal doping and defects can effectively improve the electrocatalytic activity of MoS2 electrocatalysts, but a lack of systematic studies on nonmetal doping and defect engineering hinders further design and improvement of the MoS2 electrocatalysts. Herein, a novel strategy is proposed to improve the HER performance of MoS2 via heavy-ion irradiation. Theoretical calculations show that fluorine (F), as a doping element, exhibits an excellent HER performance of MoS2. Doping and defect engineering are combined by irradiating MoS2 using an F– ion beam with controllable fluence to verify whether F– ions can effectively regulate the electrical structure of MoS2 and contribute to its HER efficiency. This work provides a strong theoretical basis and experimental support for the rational design of the MoS2 electrocatalysts and expands the understanding of the optimization of the electrocatalytic activity of other catalysts. [ABSTRACT FROM AUTHOR]

Bamboo and wood are widely used as food contact materials (FCMs). Fungicides are often applied during the manufacture of these products to prevent mildew; thus, monitoring for fungicide residues is essential because of the possible risks to food safety. However, it is not clear whether residual fungicides in treated bamboo and wood products migrate into food to cause harm to humans, and there is an absence of procedures for these analyses. In this study, the simultaneous determination of fungicides was validated in bamboo and wood FCMs by high-performance liquid chromatography–triple quadrupole tandem mass spectrometry (HPLC–MS/MS). The analytes were extracted with methanol or 1:1 methanol/acetonitrile and purified using 25 mg primary secondary amine adsorbent with 2.5 mg graphitized carbon black or 25 mg PSA with 25 mg octadecylsilane (C18). The recoveries for wood and bamboo FCMs were from 60.0% to 100.7% and 70.0% to 97.5%, respectively. The intra-day precision of wood and bamboo FCMs were from 0.1% to 5.3% and 0.1 to 3.0%, and the inter-day precision from 0.3% to 8.5% and 1.2% to 7.8%, respectively. The limits of detection ranged from 0.11 to 15.38 for wood and 0.25–6.19 μg kg−1 for bamboo. This method provides a reference for the determination of fungicides in bamboo and wood FCMs. [ABSTRACT FROM AUTHOR]

In this work, a simple, controllable and mass-produced microcrack technique for stretchable strain sensors is presented. Specifically, the conductive layer (hydroxylated MWCNTs) and the flexible substrate (Ecoflex) of fiber strain flexible sensors are modified based on proton irradiation defect engineering. The evolution of defects in sensitive materials and the density of microcracks in flexible substrates are controlled by controlling the irradiation fluence during the irradiation process. In particular, when the irradiation fluence is 1 × 1014 p cm−2, the gauge factor (GF) of the fiber strain sensor is as high as 1274.8, and the response time and recovery time are reduced by 49.4% and 45.1%, respectively. At the same time, the microcracked structure does not fracture easily under a large strain, the maximum strain being 800%. In addition, fiber strain flexible sensors can also be used to detect biomechanical signals in different scenarios. This simple and efficient microcrack technique opens up a new prospect for the fabrication of high-performance stretchable strain sensors. [ABSTRACT FROM AUTHOR]

Molybdenum disulfide (MoS2) with its low cost, excellent electrochemical stability and large specific surface area is expected to replace noble metals such as platinum as a new type of high-efficiency electrocatalyst. Since it is very difficult to effectively improve the catalytic performance only from intrinsic materials, we used the 60Co γ-ray as the irradiation source to modify thin layer MoS2 nanosheets (MoS2 NSs), and explore the irradiation effect and the mechanism of catalytic performance improvement. The structure–activity relationship was investigated in depth by characterizing the morphology and structure of MoS2 NSs before and after γ-ray irradiation, combined with the changes in HER performance. The results show that the irradiation-induced defects are dominated by sulfur (S) vacancies, which can efficiently regulate the intrinsic electronic structure of MoS2 NSs. The introduction of defects increases the number of active sites on the surface of nanosheets and improves the reaction kinetics, optimizing the hydrogen evolution reaction (HER) performance. When the irradiation dose is too large, we reveal that the oxygen atoms passivate the S vacancies in the MoS2 NSs and cause the concentration of S vacancies to decrease, resulting in the reduction of electrocatalytic performance. It is concluded that the appropriate irradiation dose is the key factor to improve the HER performance of MoS2 NSs. [ABSTRACT FROM AUTHOR]

In this paper, we study 2-local superderivations on the Lie superalgebra of Block type S(q), which is an infinite dimensional Lie superalgebra with an outer derivation. We prove that all 2-local superderivations on S(q) are superderivations. [ABSTRACT FROM AUTHOR]

Within the ultrarelativistic quantum molecular dynamics (UrQMD) model, the effect of initial density fluctuations on cumulants of the net-proton multiplicity distribution in Au + Au Collisions at s N N = 7.7 GeV was investigated by varying the minimum distance d min between two nucleons in the initialization. It was found that the initial density fluctuations increased with the decrease of d min from 1.6 fm to 1.0 fm, and the influence of d min on the magnitude of the net-proton number fluctuation in a narrow pseudorapidity window ( Δ η ≤ 4) was negligible even if it indeed affected the density evolution during the collision. At a broad pseudorapidity window ( Δ η ≥ 4), the cumulant ratios were enlarged when the initial density fluctuations were increased with the smaller value of d min , and this enhancement was comparable to that observed in the presence of the nuclear mean-field potential. Moreover, the enhanced cumulants were more evident in collisions with a larger impact parameter. The present work demonstrates that the fingerprint of the initial density fluctuations on the cumulants in a broad pseudorapidity window is clearly visible, while it is not obvious as the pseudorapidity window becomes narrow. [ABSTRACT FROM AUTHOR]

Controllable and stable 1T phase MoS2 nanosheets (MoS2 NSs) were obtained by 1 MeV electron irradiation for the first time, and the hydrogen evolution reaction (HER) performance was improved. We propose that the synergistic effect of electron excitation and vacancy formation, and mechanical strain are the main factors causing the phase transition from the 2H to 1T phase in MoS2 NSs induced by electron irradiation. It was found that the irradiation-induced defects in the catalysts could provide abundant active sites, while 1T phase MoS2 NSs with excellent electrical conductivity would greatly improve the interfacial charge transfer rate, which is beneficial for improving the catalytic performance. In addition, the appropriate irradiation fluence is the key factor to improve the HER performance of MoS2 NSs. Therefore, the application of the electron irradiation method provides a new strategy to enhance the HER performance of MoS2 NSs. [ABSTRACT FROM AUTHOR]

In this paper, skew-symmetric biderivations of the affine-Virasoro algebra of type A1 are presented. More precisely, we prove that every skew-symmetric biderivation is an inner biderivation. As an application, we characterize the forms of the linear commuting maps on the affine-Virasoro algebra of type A1. [ABSTRACT FROM AUTHOR]