Qing-yuan He

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This study examined the polyphenols of tea leaves as chemotaxonomic markers to investigate the phenetic relationship between 89 wild (the small-leaved C.sinensis var. sinensis and large-leaved C. sinensis var. assamica), hybrid, and cultivated tea trees from China and Japan. (-)-Epigallocatechin 3-O-gallate, EGCG (1); (-)-epigallocatechin, EGC (2);(More)
The study on the effects of different concentration (0, 10, 50, 100, 200 and 400 micromol x L(-1)) cadmium (Cd) on the antioxidative system in Ganoderma lucidum mycelia indicated that with increasing concentration of Cd, the fresh mass and the proline, total polysaccharides, and reduced polysaccharides contents of G. lucidum mycelia decreased, but(More)
The extracellular space (ECS) of brain is defined as an irregular channel which is located in the interstitial tissue outside the plasma membranes of neurons, and occupied by interstitial fluid (ISF). Diffusion in ECS is described by a modified diffusion equation from which several parameters can be calculated, such as the diffusion coefficient (D), the(More)
OBJECTIVE To observe the diffusion of Gd-DTPA in brain extracellular space (ECS) by magnetic resonance imaging(MRI) and investigate the feasibility of ECS measurement by using MRI tracer method in vivo. METHODS 2 microL Gd-DTPA was introduced into ECS by caudate nucleus according to stereotaxic atlas in 8 Sprague Dawley(SD) rats (male, 280-320 g). The MRI(More)
This paper studied the effects of different concentration (0, 10, 30, 50, and 100 micromol x L(-1)) CuSO4 on the leaf physiological and biochemical characteristics of Medicago sativa seedlings cultured with 1/4-strength Hoagland nutrient solution. In treatments 30, 50, and 100 micromol x L(-1) of CuSO4, the leaf H2O2, OH., and MDA contents and Fe-SOD and(More)
OBJECTIVE To analyze correlation factors of hemodynamic damage after carotid artery stenting. METHODS In this study, 66 cases (71 lesions) who undertook carotid artery stenting were collected and the correlation factors of hemodynamic damage were analyzed. RESULTS Hemodynamic damage emerged in 23 cases (32.4%), of which, 11.3% developed hypotension. The(More)
OBJECTIVE To evaluate the effectiveness and safety of endovascular treatment in solving symptomatic cerebral artery tandem lesions. METHODS From June 2012 to February 2014, 12 cases (24 lesions) with symptomatic cerebral artery tandem lesions were accepted for the endovascular treatment. The distributions of the tandem lesions were as follows: the common(More)
OBJECTIVE To build a mathematical model to simulate the drug distribution accompanying with diffusion, distribution and clearance in the brain extracellular space (ECS). METHODS Magnetic resonance imaging (MRI) technology was used to monitor changes in the signal-intensity-related tracer gadolinium-diethylene triamine pentaacetic acidm(Gd-DTPA), as an(More)
OBJECTIVE To assess the safety and effectiveness of middle cerebral artery angioplasty in treatment of subcortical watershed infarcts (S-CWI) with moderate or severe disabilities. METHODS From June 2011 to May 2012, 5 S-CWI patients (six lesions) with moderate or severe disabilities combining severe stenosis in Ipsilateral middle cerebral artery received(More)
OBJECTIVE To study the morphology of middle cerebral artery (MCA) M1 segment. METHODS We selected the MRA data of 794 MCA (400 of the left side and 394 of the right side) from January 1, 2011 to June 30, 2011 consecutively and analyzed the morphology of the MCA M1 segment in axial, anteroposterior and lateral view, measured the length of the M1 segment,(More)
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