49 Result(s)
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Article
**axiang Li
English
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Article
The quasiconformal subinvariance property of John domains in \({\mathbb {R}}^n\) and its applications
The main aim of this paper is to give a complete solution to one of the open problems, raised by Heinonen from 1989, concerning the subinvariance of John domains under quasiconformal map**s in ...
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Open AccessOuabain prevents pathological cardiac hypertrophy and heart failure through activation of phosphoinositide 3-kinase α in mouse
Use of low doses of digitalis to prevent the development of heart failure was advocated decades ago, but conflicting results of early animal studies dissuaded further research on this issue. Recent discoverie...
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Physiological and cellular responses to fluoride stress in tea (Camellia sinensis) leaves
Tea (Camellia sinensis (L.) O. Kuntze) hyper-accumulates fluoride (F), mainly in the leaves. To understand how tea copes with the stress caused by F, we tracked photosynthesis, antioxidant defense, and cell ultra...
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Open AccessStructural insights into the interaction and disease mechanism of neurodegenerative disease-associated optineurin and TBK1 proteins
Optineurin is an important autophagy receptor involved in several selective autophagy processes, during which its function is regulated by TBK1. Mutations of optineurin and TBK1 are both associated with neurod...
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Species-specific and general allometric equations for estimating tree biomass components of subtropical forests in southern China
Chinese subtropical forests contain a diversity of tree species and exhibit a high carbon (C) sequestration capacity, but biomass and C stock assessments in subtropical secondary forests remain uncertain becau...
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Stepwise Identification of Six Tea (Camellia sinensis (L.)) Categories Based on Catechins, Caffeine, and Theanine Contents Combined with Fisher Discriminant Analysis
Six tea types were stepwise discriminated based on their catechins, caffeine, and theanine contents of total 436 tea samples collected worldwide, combined with Fisher classification pattern recognition. Those ...
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Open AccessUltrahigh Oxidation Resistance and High Electrical Conductivity in Copper-Silver Powder
The electrical conductivity of pure Cu powder is typically deteriorated at elevated temperatures due to the oxidation by forming non-conducting oxides on surface, while enhancing oxidation resistance via alloy...
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Open AccessThe proposed biosynthesis of procyanidins by the comparative chemical analysis of five Camellia species using LC-MS
The genus Camellia (C.) contains many species, including C. sinensis, C. assamica, and C. taliensis, C. gymnogyna and C. tachangensis. The polyphenols of C. sinensis and C. assamica are flavan-3-ols monomers and ...
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The basic characteristics and spatial patterns of global cultivated land change since the 1980s
In this paper, we analyzed the spatial patterns of cultivated land change between 1982 and 2011 using global vector-based land use/land cover data. (1) Our analysis showed that the total global cultivated land...
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Open AccessMechanistic insight into TRIP13-catalyzed Mad2 structural transition and spindle checkpoint silencing
The spindle checkpoint maintains genomic stability and prevents aneuploidy. Unattached kinetochores convert the latent open conformer of the checkpoint protein Mad2 (O-Mad2) to the active closed conformer (C-M...
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Nitrogen and phosphorus concentrations and allocation strategies among shrub organs: the effects of plant growth forms and nitrogen-fixation types
We aimed to explore the influences of plant functional groups on nutrient concentrations and allocation strategies among shrub organs, as well as to examine the effects of climate, soil and species on nutrient...
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Determination of free amino acids in tea by a novel method of reversed-phase high performance liquid chromatography applying 6-Aminoquinolyl-N-Hydroxysuccinimidyl carbamate reagent
We describe a novel analytical method for quantification of free amino acids in tea using variable mobile phase pH, elution gradient and column temperature of reversed-phase high-performance liquid chromatogra...
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Weakly Quasisymmetric Maps and Uniform Spaces
Suppose that X and Y are quasiconvex and complete metric spaces, that \(G\subset X\) ...
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Characterizations of John spaces
The main purpose of this paper is to study the characterizations of John spaces. We obtain five equivalent characterizations for length John spaces. As an application, we establish a dimension-free quasisymmet...
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Structural basis of tubulin detyrosination by vasohibins
Microtubules are regulated by post-translational modifications of tubulin. The ligation and cleavage of the carboxy-terminal tyrosine of α-tubulin impact microtubule functions during mitosis, cardiomyocyte con...
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Open AccessThe tea plant reference genome and improved gene annotation using long-read and paired-end sequencing data
Tea is a globally consumed non-alcohol beverage with great economic importance. However, lack of the reference genome has largely hampered the utilization of precious tea plant genetic resources towards breedi...
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Open AccessThe roles of kinetochore of micronucleus in mitosis of HeLa cells: a live cell imaging study
Micronuclei (MNi) are extensively used to evaluate genotoxic effects and chromosome instability. However, the roles of kinetochore of MN in mitosis have not been completely addressed.
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The impacts of brewing in glass tumblers and thermos vacuum mugs on the aromas of green tea (Camellia sinensis)
This study investigated the effect of brewing apparatus on the aromatic feature of tea infusion. Huangshan Maofeng tea infusion was brewed under glass tumblers (GT) or thermos vacuum mugs (TVM) for up to 180 m...
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Open AccessOverestimated climate warming and climate variability due to spatially homogeneous CO2 in climate modeling over the Northern Hemisphere since the mid-19th century
Since the mid-19th century, the global atmospheric CO2 concentration (ACC) has increased dramatically due to the burning of fossil fuels. Because of unequal population growth and economic development among region...
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Effect of different oxidants on properties of tin-graphite composite anode material for lithium-ion battery
In this paper, oxidation do** modification of tin-graphite composite anode material, discussing the effect of do** different oxidants on the properties of composites. The structure and morphology were meas...
