Adsorption and regeneration on activated carbon fiber cloth for volatile organic compounds at indoor concentration levels.

There are increasing concerns about indoor volatile organic compounds (VOCs) regarding their health effects and frequent occurrence. Adsorption using granular activated carbon (GAC) is a safe methodology for removing VOCs from indoor air. Although GAC has been widely used to remove VOCs from indoor air, the use of activated carbon fiber cloth (ACFC) is a promising substitute to the conventional activated carbon because of its regenerative properties; hence, this paper provides promising results for the application of ACFC as a regenerative adsorbent for the removal of VOCs from indoor air.

Hydrazine-linked convergent self-assembly of sophisticated concave polyhedrons of beta-Ni(OH)(2) and NiO from nanoplate building blocks.

Intelligent self-assembly of nanobuilding blocks during the formation of Ni(OH)(2) single crystals with concave polyhedron structure was studied. The nickel hydroxide nanoplates pile up together with the aid of hydrazine molecules and grow along the [001] direction to form the brand-new geometry of concave polyhedrons. The novel nanostructure looks like a regularly twisted triangular prism wringed smoothly in the middle and could be attributed to the inherent spatial asymmetry of the nickel hydroxide crystal structure and the hydrogen bonds linked with the added hydrazine molecules.

Expression of osteocalcin during surgically assisted rapid orthodontic tooth movement in beagle dogs.

Purpose: To investigate the expression of osteocalcin during rapid orthodontic tooth movement aided by alveolar surgery in beagle dogs.

Materials And Methods: Eight male beagles were used, and bilateral mandibular second premolars were extracted for distalization of the first premolars against the third premolars by orthodontic NiTi coil spring with a force of 100 gm. Right and left mandibular sides were randomly assigned to experimental and sham sides, and alveolar surgery was performed only on the experimental side to reduce the osteal resistance on the mesial side of the extraction socket.

Response of cementoblast-like cells to mechanical tensile or compressive stress at physiological levels in vitro.

To clarify the role of cementoblast in orthodontic-related root resorption, this study was attempted to examine whether murine cementoblast-like cells are responsive to mechanical stress, and how mechanical forces regulate bone sialoprotein (BSP) and osteopontin (OPN) gene expression in these cells in vitro. In this force-loading model, defined and reproducible mechanical loadings of different magnitudes and types were applied up to 24 h. Besides a transitory and reversible change in cell proliferation, remarkable alterations in gene transcription of BSP and OPN were found.

[Study on the microstructure of acellular dermal matrix and its biocompatibility with MG63 osteoblast-like cells].

Objective: To study the microstructue of acellular dermal matrix (ADM) and the attachment and proliferation of MG63 osteoblast-like cells on the membrane.

Methods: ADM was experimental group and expanded polytetrafluoroethylene (e-PTFE) membrane was control group. Light microscope and scanning electronic microscope (SEM) were used to observe the microstructure of the two kinds of membrane.

Distribution and corticosteroid regulation of glucocorticoid receptor in the brain of Xenopus laevis.

Glucocorticoids (GCs) play essential roles in physiology, development, and behavior that are mediated largely by the glucocorticoid receptor (GR). Although the GR has been intensively studied in mammals, very little is known about the GR in nonmammalian tetrapods. We analyzed the distribution and GC regulation of GR in the brain of the frog Xenopus laevis by immunohistochemistry.

Evolutionarily conserved glucocorticoid regulation of corticotropin-releasing factor expression.

Glucocorticoids (GCs) exert feedback regulation on corticotropin-releasing factor (CRF) neurons in mammals. The nature of GC actions is cell-type specific, being either inhibitory (e.g.

[Bending mechanical properties of NiTi round wire].

Objective: To investigate the bending mechanical properties and provide reference for orthodontists to select the proper wires during alignment stage.

Methods: In order to analyze the load deflection rate of NiTi round wire quantitatively, some NiTi round wires of different cross-sectional dimension (0.36, 0.

Regulation of vertebrate corticotropin-releasing factor genes.

Developmental, physiological, and behavioral adjustments in response to environmental change are crucial for animal survival. In vertebrates, the neuroendocrine stress system, comprised of the hypothalamus, pituitary, and adrenal/interrenal glands (HPA/HPI axis) plays a central role in adaptive stress responses. Corticotropin-releasing factor (CRF) is the primary hypothalamic neurohormone regulating the HPA/HPI axis.

[Proliferation of myofibroblast in periodental tension side during orthodontic tooth movement of beagle dogs].

Objective: To examine the proliferation of myofibroblast in periodental tension side of beagle dog during experimental tooth movement in orthodontics.

Methods: By the fixed orthodontic appliance, the five beagles were treated with 100 g forces that moved medially the maxillary first premolar, and the treatment lasted for four weeks. Using transmission electron microscope and immunohistochemistry, the proliferation of myofibroblast and expression of alpha-smooth muscle actin (alpha-SMA) were evaluated at week 1, 2, 3, 4 or 8 respectively after the orthodontic treatment.

Structural and functional conservation of vertebrate corticotropin-releasing factor genes: evidence for a critical role for a conserved cyclic AMP response element.

Corticotropin-releasing factor (CRF) plays a central role in neuroendocrine, autonomic, immune, and behavioral responses to stressors. We analyzed the proximal promoters of two Xenopus laevis CRF genes and found them to be remarkably conserved with mammalian CRF genes. We found several conserved cis elements in the frog CRF genes including a cAMP response element (CRE), activator protein 1 binding sites, and glucocorticoid response elements.

[Gene expression profile in acute spinal cord injury screened by cDNA microarray: experiment with rats].

Objective: To investigate the characteristic changes of expression of the genes with specific functions in acute spinal cord injury (SCI).

Methods: Nine SD rats were randomly divided into 3 equal groups: SCI 8-hour group in which modified Allen's falling strike method was used to establish spinal cord contusion model, the spinal cords were taken out 8 hours later to undergo examination of the gene expression profile by using cDNA microarray including 13 200 gene, 12 genes were selected to undergo semi-quantitative RT-PCR, and the up-regulation of the candidate gene C/EBPdelta was verified by in situ hybridization and immunohistochemistry.; SCI 72-hour group undergoing the same treatment, however, with the spinal cord taken out 72 hours later; and control group undergoing only sham operation with the spinal cord taken out immediately.