Coupling mechanism of rural settlements and mountain disasters in the upper reaches of Min River

Settlement marks the crucial spatial form for human survival, while rural settlement serves as concentrated reflection of relationship between human and land in mountainous areas. The upper reaches of Min River is not only a multi-ethnic neighborhood, but also a typical eco-environmental vulnerable area as well as the prone area for mountain hazards. Taking SPOT-5 images as the significant data source for spatial analysis, this paper, in accordance with the different geographical positions that rural settlements are located, classifies rural settlement into three types: valley settlement, slope surface settlement and mountain settlement, aiming at boundary characteristics of which the paper confirms symbol for their remote sensing interpretation. With the combined approach of field survey and remote sensing interpretation, the paper finds out that in study area, there are 1667 natural settlements under 625 administrative villages, density of which is 0.025km2, and settlement distribution in this region enjoys the features of dispersity, low density as well as small scale.

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EVALUATION OF TISSUE STEROID BINDING IN VITRO

Acta Endocrinologica ◽

10.1530/acta.0.068s223 ◽

1971 ◽

Vol 68 (1_Suppl) ◽

pp. S223-S246 ◽

Cited By ~ 2

Author(s):

C. R. Wira ◽

H. Rochefort ◽

E. E. Baulieu

Keyword(s):

Protein Binding ◽

Binding Sites ◽

Experimental System ◽

Specific Protein ◽

Coupling Mechanism ◽

Target Tissue ◽

Protein Binding Sites ◽

Definition Of ◽

Hormone Specificity

ABSTRACT The definition of a RECEPTOR* in terms of a receptive site, an executive site and a coupling mechanism, is followed by a general consideration of four binding criteria, which include hormone specificity, tissue specificity, high affinity and saturation, essential for distinguishing between specific and nonspecific binding. Experimental approaches are proposed for choosing an experimental system (either organized or soluble) and detecting the presence of protein binding sites. Techniques are then presented for evaluating the specific protein binding sites (receptors) in terms of the four criteria. This is followed by a brief consideration of how receptors may be located in cells and characterized when extracted. Finally various examples of oestrogen, androgen, progestagen, glucocorticoid and mineralocorticoid binding to their respective target tissues are presented, to illustrate how researchers have identified specific corticoid and mineralocorticoid binding in their respective target tissue receptors.

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Anionic and Cationic Redox Processes in β-Li2IrO3 and Their Structural Implications on Electrochemical Cycling in Li-Ion Cell

10.26434/chemrxiv.10028603.v1 ◽

2019 ◽

Author(s):

Paul Pearce ◽

Gaurav Assat ◽

Antonella Iadecola ◽

François Fauth ◽

Rémi Dedryvère ◽

...

Keyword(s):

Analytical Techniques ◽

Charge Compensation ◽

Coupling Mechanism ◽

Redox Processes ◽

Positive Electrodes ◽

X Ray ◽

Electrochemical Cycling ◽

Li Ion ◽

Electrochemical Instability ◽

High Degree

The recent discovery of anionic redox as a means to increase the energy density of transition metal oxide positive electrodes is now a well established approach in the Li-ion battery field. However, the science behind this new phenomenon pertaining to various Li-rich materials is still debated. Thus, it is of paramount importance to develop a robust set of analytical techniques to address this issue. Herein, we use a suite of synchrotron-based X-ray spectroscopies as well as diffraction techniques to thoroughly characterize the different redox processes taking place in a model Li-rich compound, the tridimentional hyperhoneycomb β-Li2IrO3. We clearly establish that the reversible removal of Li+ from this compound is associated to a previously described reductive coupling mechanism and the formation of the M-(O-O) and M-(O-O)* states. We further show that the respective contributions to these states determine the spectroscopic response for both Ir L3-edge X-ray absorption spectroscopy (XAS) and X-ray photoemissions spectroscopy (XPS). Although the high covalency and the robust tridimentional structure of this compound enable a high degree of reversibile delithiation, we found that pushing the limits of this charge compensation mechanism has significant effects on the local as well as average structure, leading to electrochemical instability over cycling and voltage decay. Overall, this work highlights the practical limits to which anionic redox can be exploited and sheds some light on the nature of the oxidized species formed in certain lithium-rich compounds.<br>

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Anionic and Cationic Redox Processes in β-Li2IrO3 and Their Structural Implications on Electrochemical Cycling in Li-Ion Cell

10.26434/chemrxiv.10028603 ◽

2019 ◽

Author(s):

Paul Pearce ◽

Gaurav Assat ◽

Antonella Iadecola ◽

François Fauth ◽

Rémi Dedryvère ◽

...

Keyword(s):

Analytical Techniques ◽

Charge Compensation ◽

Coupling Mechanism ◽

Redox Processes ◽

Positive Electrodes ◽

X Ray ◽

Electrochemical Cycling ◽

Li Ion ◽

Electrochemical Instability ◽

High Degree

The recent discovery of anionic redox as a means to increase the energy density of transition metal oxide positive electrodes is now a well established approach in the Li-ion battery field. However, the science behind this new phenomenon pertaining to various Li-rich materials is still debated. Thus, it is of paramount importance to develop a robust set of analytical techniques to address this issue. Herein, we use a suite of synchrotron-based X-ray spectroscopies as well as diffraction techniques to thoroughly characterize the different redox processes taking place in a model Li-rich compound, the tridimentional hyperhoneycomb β-Li2IrO3. We clearly establish that the reversible removal of Li+ from this compound is associated to a previously described reductive coupling mechanism and the formation of the M-(O-O) and M-(O-O)* states. We further show that the respective contributions to these states determine the spectroscopic response for both Ir L3-edge X-ray absorption spectroscopy (XAS) and X-ray photoemissions spectroscopy (XPS). Although the high covalency and the robust tridimentional structure of this compound enable a high degree of reversibile delithiation, we found that pushing the limits of this charge compensation mechanism has significant effects on the local as well as average structure, leading to electrochemical instability over cycling and voltage decay. Overall, this work highlights the practical limits to which anionic redox can be exploited and sheds some light on the nature of the oxidized species formed in certain lithium-rich compounds.<br>

Download Full-text