Infinite clusters in locally dependent percolation on ℤ d

Xu, Zhonghao; Han, Dong

doi:10.1007/s12204-009-0626-x

Cited by 11 publications

(12 citation statements)

References 5 publications

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“…The most widely studied drug delivery scaffolds are biodegradable polymer composed, such as polyarylates (PLA, PLGA, PGA, etc.). [17][18][19] Though they have been already used for growth factor loading with controlled release kinetics, the pure polymer scaffolds have inherent disadvantages as bone repair materials because of their inadequate osteoconductivity. 20 In contrast, traditional inorganic bioceramic scaffolds (e.g.…”

Section: Introductionmentioning

confidence: 99%

3D-printed dimethyloxallyl glycine delivery scaffolds to improve angiogenesis and osteogenesis

et al. 2015

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Angiogenesis-osteogenesis coupling processes are vital in bone tissue engineering. Normal biomaterials implanted in bone defects have issues in the sufficient formation of blood vessels, especially in the central part. Single delivery of vascular endothelial growth factors (VEGF) to foci in previous studies did not show satisfactory results due to low loading doses, a short protein half-life and low efficiency. Development of a hypoxia-mimicking microenvironment for cells by local prolyl-4-hydroxylase inhibitor release, which can stabilize hypoxia-inducible factor 1α (HIF-1α) expression, is an alternative method. The aim of this study was to design a dimethyloxallyl glycine (DMOG) delivering scaffold composed of mesoporous bioactive glasses and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) polymers (MPHS scaffolds), so as to investigate whether the sustained release of DMOG promotes local angiogenesis and bone healing. The morphology and microstructure of composite scaffolds were characterized. The DMOG release patterns from scaffolds loaded with different DMOG dosages were evaluated, and the effects of DMOG delivery on human bone marrow stromal cell (hBMSC) adhesion, viability, proliferation, osteogenic differentiation and angiogenic-relative gene expressions with scaffolds were also investigated. In vivo studies were carried out to observe vascular formations and new bone ingrowth with DMOG-loaded scaffolds. The results showed that DMOG could be released in a sustained manner over 4 weeks from MPHS scaffolds and obviously enhance the angiogenesis and osteogenesis in the defects. Microfil perfusion showed a significantly increased formation of vessels in the defects with DMOG delivery. Furthermore, micro-CT imaging and fluorescence labeling indicated larger areas of bone formation for DMOG-loaded scaffolds. It is concluded that MPHS-DMOG scaffolds are promising for enhancing bone healing of osseous defects.

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Section: Introductionmentioning

confidence: 99%

3D-printed dimethyloxallyl glycine delivery scaffolds to improve angiogenesis and osteogenesis

et al. 2015

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“…In 2019, out of the district's total 740,000 residents, approximately one third had rural hukou status, and about one quarter were registered as non‐local residents (Liu & Ye, 2020), indicating a large population of peri‐urban residents. Like in the rural communities, most caregivers in the sampled peri‐urban community speak the Sichuanese dialect of Mandarin at home (Xu, 1999).…”

Section: Methodsmentioning

confidence: 99%

Associations between urbanization and the home language environment: Evidence from a LENA study in rural and peri‐urban China

Ma,

Zhang,

Pappas

et al. 2023

Child Development

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In low‐ and middle‐income countries, urbanization has spurred the expansion of peri‐urban communities, or urban communities of formerly rural residents with low socioeconomic status. The growth of these communities offers researchers an opportunity to measure the associations between the level of urbanization and the home language environment (HLE) among otherwise similar populations. Data were collected in 2019 using Language Environment Analysis observational assessment technology from 158 peri‐urban and rural households with Han Chinese children (92 males, 66 females) aged 18–24 months in China. Peri‐urban children scored lower than rural children in measures of the HLE and language development. In both samples, child age, gender, maternal employment, and sibling number were positively correlated with the HLE, which was in turn correlated with language development.

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“…The stress concentration factor increases with the depth of the pit, and the stress tends to increase when the pit is more elongated in the direction normal to the applied load [ 8 ]. Figure 10 shows an ellipsoidal pit in a 2-dimensional infinite solid under far-field tensile forces [ 50 ]. According to the results of Inglis on the stress concentration around an elliptical hole [ 51 ], the stress distribution is described in Equation (3) and Equation (4).…”

Section: Influence Of Pitting Geometry On the Tensile Behavior Of mentioning

confidence: 99%

“…Figure 11 shows the relationship between defect size and failure strength [ 50 ]. When λ = 1, an ellipsoidal hole reduces to a spherical hole and the strength of materials reaches its maximum.…”

Section: Influence Of Pitting Geometry On the Tensile Behavior Of mentioning

confidence: 99%

The Corrosion Characteristics and Tensile Behavior of Reinforcement under Coupled Carbonation and Static Loading

2015

Materials

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This paper describes the non-uniform corrosion characteristics and mechanical properties of reinforcement under coupled action of carbonation and static loading. The two parameters, namely area-box (AB) value and arithmetical mean deviation (Ra), are adopted to characterize the corrosion morphology and pitting distribution from experimental observations. The results show that the static loading affects the corrosion characteristics of reinforcement. Local stress concentration in corroded reinforcement caused by tensile stress drives the corrosion pit pattern to be more irregular. The orthogonal test results from finite element simulations show that pit shape and pit depth are the two significant factors affecting the tensile behavior of reinforcement. Under the condition of similar corrosion mass loss ratio, the maximum plastic strain of corroded reinforcement increases with the increase of Ra and load time-history significantly.

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Infinite clusters in locally dependent percolation on ℤ d

Cited by 11 publications

References 5 publications

3D-printed dimethyloxallyl glycine delivery scaffolds to improve angiogenesis and osteogenesis

3D-printed dimethyloxallyl glycine delivery scaffolds to improve angiogenesis and osteogenesis

Associations between urbanization and the home language environment: Evidence from a LENA study in rural and peri‐urban China

The Corrosion Characteristics and Tensile Behavior of Reinforcement under Coupled Carbonation and Static Loading

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