基于SFIC模型的社区养教结合协同治理研究

养教结合是提高老年人生活质量和幸福感的重要途径,在老龄化社会中将发挥愈加重要的作用。本研究围绕SFIC模型的起始条件、催化领导、制度设计与协同过程对养教结合的现实困境展开探讨,发现在当前的养教结合实践中,还存在着各主体服务动机不强、缺乏政府有力引领、政策法规缺少针对性,以及尚未建立起长效机制等问题。基于此,为促进社区养教结合健康可持续发展,以SFIC协同治理模型为框架,提出了完善养教结合协同治理的相关建议。

Study of Effects of Plant Growth Regulators on Fruit Quality of Table Grape

The effects of different treatments on the seedlessness and fruit quality of‘Miguang’table grape was studied by using plant growth regulators,gibberellin acid(GA 3)and forchlorfenuron(CPPU),under different concentrations and application time.The results showed that the effects of different treatments on the seedlessness and fruit quality were different.Seedless rate,cluster weight,berry weight,berry shape index,soluble solid content,total acid content,soluble solids to acidity ratio,pulling resistance,turgor pressure and flesh firmness without skin were comprehensively evaluated,as a result of which,the optimum treatment on‘Miguang’table grape was to apply with GA 320 mg/L+SM 200 mg/L at one week before bloom and GA 325 mg/L+CPPU 3 mg/L at two weeks after bloom.

Comprehensive evaluation of Actinidia arguta fruit based on the nutrition and taste:67 germplasm native to Northeast China

Actinidia arguta is a berry fruit with high nutritional values.To evaluate the comprehensive quality,the fruit weight,titratable acid(TAC),soluble solids(SSC),vitamin C,mineral elements,and taste value of67 accessions of A.arguta were measured,and sensory attributes including olfactive intensity,juiciness,sweetness,sourness,and astringency were assessed.Cluster analysis was carried out based on mineral elements,and principal component analysis(PCA)was used for comprehensive score ranking.The result demonstrated that fruit weight ranged from 3.5 g to 24.2 g,SSC ranged from 11.94%to 20.56%,TAC ranged from 0.15%to 1.20%,and vitamin C ranged from 3.51 g/kg to 230.76 g/kg(fresh weight)among the tested samples.There were significant differences in sourness,sweetness,bitterness,and umami among the 67 accessions based on electronic tongue analysis,and this result was rapidly and objectively characterized by the sensory assessment.The dendrogram was obtained and clustered the accessions into two major clusters,and five principal components were extracted by PCA.Overall,the information provided by this study identified the 10 best germplasm resources for fresh-eating and processing fruits.It can provide theoretical reference for nutritional efficacy evaluation and food development of A.arguta.

In-situ electrochemical restructuring of Cu_(2)BiS_(x)solid solution into Bi/Cu_(x)S_(y)heterointerfaces enabling stabilization intermediates for high-performance CO_(2)electroreduction to formate

Bismuth-based materials are prevalent catalysts for CO_(2)electroreduction to formate,enduring high hydrogen evolution reactions and inadequate activity and stability.Herein,we reveal that in-situ electrochemical transformation of Cu_(2)BiS_(x)solid solution into Bi/Cu_(x)S_(y)heterointerfaces,which can stabilize the intermediates and achieve highly selective and consistent CO_(2)electroreduction.It shows over 85%Faraday efficiency(FE)of formate with a potential window of−0.8 to−1.2 VRHE(RHE:reversible hydrogen electrode)and a stability above 90%over 27 h in H-type cell at−0.9 VRHE.It maintains more than 85%of FEformate at the current density of−25 to−200 mA·cm^(−2),has stability of about 80%of FEformate at least 10 h at−150 mA·cm^(−2)in flow cell.In-situ Fourier transform infrared(FT-IR)spectroscopy measurement confirms that the preferred route of catalytic reaction is to generate *CO_(2)^(−) and *OCHO intermediates.The density functional theory(DFT)calculations illustrate that heterointerfaces facilitate the prior process of CO_(2)to HCOOH through *OCHO by additional Bi hybrid orbitals.This study is expected to open up a new idea for the design of CO_(2)electroreduction catalyst.

Engineering the viscoelasticity of gelatin methacryloyl(GelMA)hydrogels via small“dynamic bridges”to regulate BMSC behaviors for osteochondral regeneration

The dynamic extracellular matrix(ECM)constantly affects the behaviors of cells.To mimic the dynamics of ECM with controllable stiffness and energy dissipation,this study proposes a strategy in which a small molecule,3,4-dihydroxybenzaldehyde(DB),was used as fast"dynamic bridges"to construct viscoelastic gelatin methacryloyl(GelMA)-based hydrogels.The storage modulus and loss modulus of hydrogels were independently adjusted by the covalent crosslinking density and by the number of dynamic bonds.The hydrogels exhibited self-healing property,injectability,excellent adhesion and mechanical properties.Moreover,the in vitro results revealed that the viscous dissipation of hydrogels favored the spreading,proliferation,osteogenesis and chondrogenesis of bone marrow mesenchymal stem cells(BMSCs),but suppressed their adipogenesis.RNA-sequencing and immunofluorescence suggested that the viscous dissipation of hydrogels activated Yes-associated protein(YAP)by stabilizing integrinβ1,and further promoted nuclear translocation of smad2/3 andβ-catenin to enhance chondrogenesis and osteogenesis.As a result,the viscoelastic GelMA hydrogels with highest loss modulus showed best effect in cartilage and subchondral bone repair.Taken together,findings from this study reveal an effective strategy to fabricate viscoelastic hydrogels for modulating the interactions between cells and dynamic ECM to promote tissue regeneration.

Spontaneous relaxation of 2D passivation layer contributes to the aging-induced performance enhancement of perovskite solar cells

The aging-induced performance enhancement of the perovskite solar cells(PSCs)has been considered to be associated with the oxidation progress of the hole-transporting layer.Whereas the influence of the structural evolution of the passivation layer is underestimated.In this work,a spontaneous relaxation of two-dimensional(2D)passivation layer with increased n-value structure is observed,which can be accelerated under ambient atmosphere.It is demonstrated that device with relaxed 2D passivation layer exhibits reduced non-radiative recombination and optimized charge transfer property,contributing substantially to the aging-induced performance enhancement in 2D-3D heterostructured PSCs.Finally,a high fill factor of 84.15%of the devices is obtained with the relaxed 2D passivation layer,suggesting the spontaneous relaxation of 2D passivation layer is playing a key role in achieving high quality optoelectronic devices.

Cellular modulation by the mechanical cues from biomaterials for tissue engineering

Mechanical cues from the extracellular matrix(ECM)microenvironment are known to be significant in modulating the fate of stem cells to guide developmental processes and maintain bodily homeostasis.Tissue engineering has provided a promising approach to the repair or regeneration of damaged tissues.Scaffolds are fundamental in cell-based regenerative therapies.Developing artificial ECM that mimics the mechanical properties of native ECM would greatly help to guide cell functions and thus promote tissue regeneration.In this review,we introduce various mechanical cues provided by the ECM including elasticity,viscoelasticity,topography,and external stimuli,and their effects on cell behaviours.Meanwhile,we discuss the underlying principles and strategies to develop natural or synthetic biomaterials with different mechanical properties for cellular modulation,and explore the mechanism by which the mechanical cues from biomaterials regulate cell function toward tissue regeneration.We also discuss the challenges in multimodal mechanical modulation of cell behaviours and the interplay between mechanical cues and other microenvironmental factors.

Growth characteristics of Suaeda salsa under different soil salinity gradients in controlled experiments

Xinjiang is the province with the largest saline-alkali land in China.The growth of halophytes will be stressed when their salt content reaches the threshold.In this study,the pot experiments were conducted and Suaeda salsa,a typical halophyte,was selected as the object to explore the relationship between growth characteristics and salt content under different soil salinity gradients.Salinity gradients were set according to the maximum soil salinity in the current years of Ebinur Lake Wetland National Nature Reserve(ELWNNR).They were classified using the following threshold values:≤2 g/kg(Control Group),10 g/kg,20 g/kg,30 g/kg,and 40 g/kg.The original spectrum,trilateral position and growth characteristics were used as indexes for analysis.With the increase of soil salt content,the red edge shift occurs first,followed by the blue edge shift.The position of yellow edge,green peak and blue edge were not sensitive to the change of soil salinity.This indicates that the red edge is the best indicator for evaluating plant growth.Compared with the Control Group,when the salt content is less than 10 g/kg,the growth status of plant seems not significantly affected.However,plant growth begins to be stressed when the salt content increases to 20 g/kg,which is a turning point for plant health.The increase of soil salt content can inhibit chlorophyll synthesis and plant growth.Plants begin to die when the salt content reaches 40 g/kg.Therefore,40 g/kg could be regarded as the critical point of salt content which inhibits plant growth.The study also shows that the relationship between plant-height change rate and soil salt content is the most significant,indicating that the plant-height change rate is significantly impacted by soil salt content.