Intramolecular Hydrogen-Bonding Catalyst/Initiator for Precise Synthesis of Polycarbonates and Copolymers with Unprecedented Activity and Molecular Weights.

The development of efficient and selective catalytic methods for synthesizing well-defined polycarbonates and their copolymers represents a significant advancement toward sustainable polymer production. In this study, we report a series of innovative single-molecule hydrogen-bonding catalysts/initiators for the ring-opening polymerization (ROP) of cyclic carbonates, enabling rapid and precise synthesis of polycarbonates and their copolymers with polylactide. These catalysts uniquely facilitate simultaneous activation of both monomer and chain-end within a single molecular architecture, demonstrating superior activity compared to conventional multicomponent hydrogen-bonding initiating systems.

Study on the Compounding Optimization of Surfactants and Synergistic Effects on the Wettability of Anthracite Coal.

To enhance the wettability of surfactants on anthracite coal and to investigate their wettability mechanisms, a single-factor experiment was conducted using Zhulinshan smokeless coal as a model. By employing contact angle and sedimentation experiments, the optimal formulation method and concentration were established from four surfactants, which were mixed in pairs in equal proportions. Integrating the contact angle and sedimentation experiments of both single and compound surfactants with coal samples revealed that the compound solution of the anionic surfactant SDBS and the nonionic surfactant X-100 exhibited the most effective wetting performance on coal samples from Zhulinshan.

The influence of red and blue font color on intertemporal choice: the mediating roles of time perception and dimensional difference comparison.

Background: Intertemporal choices are the process by which people make choices about losses or gains at different points in time (near or far). To explore the relationship between font color and intertemporal choice and to examine the serial mediation of time perception and intradimensional difference comparison on the association between font color and intertemporal choice on the basis of attribute-based choice models.

Methods: We randomly assigned subjects to the intertemporal choices questionnaire in a specific font color (blue vs.

Advancing H-Bonding Organocatalysis for Ring-Opening Polymerization: Intramolecular Activation of Initiator/Chain End.

Organocatalytic ring-opening polymerization (ROP) of lactones is a green method for accessing renewable and biodegradable polyesters. Developing new organocatalysts with high activity and controllability is a major and challenging research topic in this field. Here, we report a series of organocatalysts to achieve a fast and controlled ROP of lactones.

Does subjective socioeconomic status moderate the effect of basic psychological need satisfaction on undergraduates' affective forecasting?

Affective forecasts are people's predictions of their future feelings in response to future events. In this study, based on the self-determination theory (SDT), we examined whether satisfying basic psychological needs influence undergraduates' affective forecasting and the moderating role of subjective socioeconomic status (SES). With a total of 423 undergraduate participants (177 males, 246 females), through one pilot study and three experiments, we first manipulated participants' basic psychological need satisfaction, i.

The effect of chronic regulatory focus and social comparison on undergraduates' intertemporal choices under gain-loss frame.

Intertemporal choice refers to decisions involving tradeoffs among costs and benefits occurred at different times. To investigate whether college students' intertemporal decision making under the gain and loss frames is affected by their chronic regulatory focus. Currently, experiment 1 investigated the influence of college students' chronic regulatory focus on intertemporal decision making under the gain and loss frames, and experiment 2 further explored the moderating effect of social comparison (i.

The Impact of Childhood Socioeconomic Status on Adolescents' Risk Behaviors: The Role of Physiological and Psychological Threats.

Adolescence is a period of high levels of risk behavior. The present research aims to examine the influences of childhood socioeconomic status (SES) on risk behaviors in gain or loss domains among adolescents and the roles of threats in this effect. In experiment 1, a total of 107 adolescents ( = 14.

Job Mobility and Subjective Well-Being among New-Generation Migrant Workers in China: The Mediating Role of Interpersonal Trust.

New-generation migrant workers refers to those born in 1980 or thereafter, who become the majority of rural-urban migrants. New-generation migrant workers in Chinese cities are struggling with a lack of urban resources, which may lead to low well-being. On the basis of a questionnaire survey of 203 new-generation migrant workers, we used a multiple regression analysis to study new-generation migrant workers' well-being and the mechanism underlying the effect of job mobility on well-being.

Simulation of the Urban Space Thermal Environment Based on Computational Fluid Dynamics: A Comprehensive Review.

Rapid urbanization has made urban space thermal environment (USTE) problems increasingly prominent. USTE research is important for improving urban ecological environment and building energy consumption. Most studies on USTE research progress have focused on meteorological observations and remote sensing methods, and few studies on USTE are based on computational fluid dynamics (CFD).

The experience of palliative care among older Chinese people in nursing homes: A scoping review.

Objective: To identify the gaps in understanding the experience of older Chinese people receiving palliative care in nursing homes.

Design: A nine-step scoping review methodology was used to search for relevant literature.

Methods: Sixteen databases were searched for relevant studies published in English from January 1990 to August 2019.

Apatinib Combined with Local Irradiation Leads to Systemic Tumor Control via Reversal of Immunosuppressive Tumor Microenvironment in Lung Cancer.

Purpose: This study aimed to investigate the potential systemic antitumor effects of stereotactic ablative radiotherapy (SABR) and apatinib (a novel vascular endothelial growth factor receptor 2 inhibitor) via reversing the immunosuppressive tumor microenvironment for lung carcinoma.

Materials And Methods: Lewis lung cancer cells were injected into C57BL/6 mice in the left hindlimb (primary tumor; irradiated) and in the right flank (secondary tumor; nonirradiated). When both tumors grew to the touchable size, mice were randomly divided into eight treatment groups.

Safety and efficacy of PD-1 blockade-activated multiple antigen-specific cellular therapy alone or in combination with apatinib in patients with advanced solid tumors: a pooled analysis of two prospective trials.

Background: The lethal effects of multiple antigen-specific cellular therapy (MASCT) may be enhanced by blocking PD-1 in vitro and vascular endothelial growth factor receptor 2 inhibitor (apatinib). We analyzed the pooled data from our phase I/II trials to determine the toxicity and efficacy of PD-1 blockade (SHR-1210)-activated MASCT (aMASCT) alone or in combination with apatinib in advanced solid tumors.

Methods: Patients with advanced solid tumors received aMASCT alone (n = 32) or aMASCT plus apatinib (500 mg q.

A seminaphthorhodafluor-based near-infrared fluorescent probe for hydrazine and its bioimaging in living systems.

Hydrazine (NH) has been classified as a potential carcinogen with its high toxicity, which can be readily absorbed through the skin or via breathing directly. Although some fluorescent probes have been developed for imaging of NH, very little can be used for imaging of NH in vivo because of its short emission wavelength. In this study, a new colorimetric and near-infrared (NIR) fluorescent probe CF-1 based on a seminaphthorhodafluor dye was successfully designed and used for hydrazine determination.

Does the Use of WeChat Lead to Subjective Well-Being?: The Effect of Use Intensity and Motivations.

Recently, WeChat has been widely used in China. The positive and negative effects of WeChat on users have received attention from researchers gradually. Using the questionnaire method, we recruited 339 undergraduates and graduates as participants, and tested the effects of WeChat on their subjective well-being (SWB) in terms of intensity.

The migration law of overlay rock and coal in deeply inclined coal seam with fully mechanized top coal caving.

In a mine area, some environment geotechnics problems always occure, induced by mined-out region such as the subsidence and cracks at ground level, deformation and destruction of buildings, landslides destruction of water resources and the ecological environment. In order to research the migration of surrounding rock and coal in steeply inclined super high seams which used fully mechanized top coal caving, a working face of a certain mine was made as an example, analyzed the migration law of the overlay rock and coal under different caving ratio of fully mechanized top coal caving with numerical simulation analysis. The results suggest that the laws of overlay rock deformation caused by deeply inclined coal seam were different from horizontal coal seam.