Publications by authors named "Yong-Zhao Zhang"

Mason type III radial head fractures are a source of concern due to the severe injury and poor recovery. At present, radial head resection, open reduction and internal fixation (ORIF), and prosthetic replacement are three common treatment methods for these fractures. The clinical efficacy and postoperative complications are controversial, which makes it difficult for physicians to determine the most appropriate regimen.

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In this Letter, three triphenylamine-based dyes (TPA-1, TPA-2a and TPA-2b) with donor–bridge–acceptor (D–p–A) structure were designed and synthesized for the purpose of G-quadruplexes recognition. In aqueous conditions, the interactions of the dyes with G-quadruplexes were studied with the aim to establish the influence of the geometry of the dyes on their binding and probing properties. Results indicate that TPA-2b displays significant selective colorimetric and fluorescent changes upon binding of G-quadruplex DNA.

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Objective: As a main cellular component within the disc, nucleus pulposus (NP) cells play important roles in disc physiology. However, little is known on the biologic hallmarks of human NP cells. Therefore, the present study aimed to address the features of human NP cells.

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Biologic and cellular treatment strategies aiming for curing intervertebral disc degeneration (IDD) have been proposed recently. Given the convenient availability and expansion potential, adipose-derived stromal cells (ADSCs) might be an ideal cell candidate. However, the interaction between ADSCs and nucleus pulposus (NP) cells still remains ambiguous, especially in direct co-cultures of the two types of cells.

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Despite surgical discectomy is one of the most effective treatments for intervertebral disc degeneration and lumbar disc herniation, a number of patients still complain of reserved low back pain, sciatica and numbness post-operatively with decreased life quality. Sciatica in patients with disc herniation is not only due to mechanical compression from herniated nucleus pulposus, but chemical and immunity agents. The intervertebral disc is composed of annulus fibrosus in the wedge and gelatinous nucleus pulposus in the centre with cartilage endplate sandwiched.

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As an intermediate filament protein, cytokeratin 8 (CK8) exerts multiple cellular functions. Moreover, it has been identified as a marker of notochord cells, which play essential roles in human nucleus pulposus (NP). However, the distribution of CK8 positive cells in human NP and their relationship with intervertebral disc degeneration (IDD) have not been clarified until now.

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With China's great efforts to improve public health insurance, clear progress has been achieved toward the ambitious full health insurance coverage strategy for all. The current health insurance schemes in China fall into three categories: urban employee basic health insurance scheme, urban resident scheme, and new rural cooperative medical system. Despite their phasic success, these substantially identity-based, district-varied health insurance schemes have separate operation mechanisms, various administrative institutions, and consequently poor connections.

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Article Synopsis
  • The compound C(10)H(12)N(2)O(4) features a trans configuration for its C=N double bond and has its non-hydrogen atoms nearly coplanar.
  • The molecule exhibits an intramolecular interaction between an O-H and an N atom.
  • In its crystal structure, molecules form a two-dimensional network through various hydrogen bonds and a C-H⋯π interaction, reinforcing their stability.
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In the title compound, C(10)H(12)N(2)O(3)·H(2)O, the Schiff base mol-ecule is approximately planar [within 0.189 (1) Å]. The inter-planar angle between the benzene and acetohydrazide planes is 8.

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In the title compound, C(9)H(10)N(2)O(3), the Schiff base mol-ecule is approximately planar, the dihedral angle between the benzene ring and the acetohydrazide group (r.m.s.

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In the title compound, C(12)H(16)N(2)O(4)·H(2)O, the mol-ecular skeleton of the hydrazinecarboxyl-ate is nearly planar [within 0.053 (3) Å]. In the crystal, chains propagating along the c axis arise, composed of alternating hydrazinecarboxyl-ate mol-ecules and crystalline water, which inter-act via N-H⋯O and O-H⋯O hydrogen bonds.

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The title compound, C(11)H(14)N(2)O(4), crystallizes with two independent but essentially identical mol-ecules in the asymmetric unit. Each mol-ecule adopts a trans configuration with respect to the C=N bond. Mol-ecules are linked into a one-dimensional network by inter- and intra-molecular N-H⋯O and C-H⋯O hydrogen bonds.

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The title compound, C(7)H(8)N(2)O(3), crystallizes with two independent but essentially identical mol-ecules in the asymmetric unit. Each mol-ecule adopts a trans configuration with respect to the C=N bond. The hydrazinecarboxyl-ate group is twisted from the furan ring by 7.

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