2,171 research outputs found
Effect of Cistanche deserticola Ma extract on memory of aged mice
Purpose: To assess the memory-enhancing effect of Cistanche deserticola Ma (Orobanchaceae) extract (CDME) on normal aged mice.Methods: An open-field test was used to study the effects of various doses of CDME on mouse locomotive activity. The mice were sacrificed following the locomotor test and the brain dissected to investigate the effects of CDME on catalase (CAT) and acetyl cholinesterase (AChE) activities in mouse brain tissue.Results: Compared with the control aged group, CDME (400 mg/kg) significantly reduced the total distance traveled (3312.5 ± 119.3 cm, p < 0.05), increased brain CAT activity (107.6 ± 11.8U/mg pro, p < 0.05), and inhibited brain AChE activity (0.89 ± 0.13 U/mg pro, p < 0.05) in CDME-exposed mice.Conclusion: The results show that CDME improves memory function in mice, probably by increasing the activity of CAT and decreasing AChE activity.Keywords: Cistanche deserticola Ma, Memory function, Catalase, Acetyl cholinesterase, Open-field tes
Methyl 3-[(1-butyl-1H-indol-3-yl)carbonylamino]propionate
In the title molecule, C17H22N2O3, the mean plane of the terminal (C=O)OMe fragment and the indole plane form a dihedral angle of 78.94 (3)°. Intermolecular N—H⋯O hydrogen bonds link the molecules into chains extended along the c axis. The crystal packing exhibits π–π interactions, indicated by the short distance of 3.472 (2) Å between the centroids of the five-membered heterocycles of neighbouring molecules
Methyl (1H-pyrrol-2-ylcarbonylamino)acetate
In the crystal structure of the title compound, C8H10N2O3, molecules are linked by N—H⋯O hydrogen bonds, forming ribbons of centrosymmetric dimers extending along the c axis
Transcriptomic analysis of Bursaphelenchus xylophilus treated by a potential phytonematicide, punicalagin
A CCD-based reader combined with CdS quantum dot-labeled lateral flow strips for ultrasensitive quantitative detection of CagA
Optimizing Hydraulic Fracturing Treatment Integrating Geomechanical Analysis and Reservoir Simulation for a Fractured Tight Gas Reservoir, Tarim Basin, China
Observation of Non-Hermitian Skin Effect in Thermal Diffusion
The paradigm shift of the Hermitian systems into the non-Hermitian regime
profoundly modifies the inherent topological property, leading to various
unprecedented effects such as the non-Hermitian skin effect (NHSE). In the past
decade, the NHSE effect has been demonstrated in quantum, optical and acoustic
systems. Besides in those non-Hermitian wave systems, the NHSE in diffusive
systems has not yet been explicitly demonstrated, despite recent abundant
advances in the study of topological thermal diffusion. Here we first design a
thermal diffusion lattice based on a modified Su-Schrieffer-Heeger model which
enables the observation of diffusive NHSE. In the proposed model, the periodic
heat exchange rate among adjacent unit cells and the asymmetric temperature
field coupling inside unit cells can be judiciously realized by appropriate
configurations of structural parameters of unit cells. The transient
concentration feature of temperature field on the boundary regardless of
initial excitation conditions can be clearly observed, indicating the
occurrence of transient thermal skin effect. Nonetheless, we experimentally
demonstrated the NHSE and verified the remarkable robustness against various
defects. Our work provides a platform for exploration of non-Hermitian physics
in the diffusive systems, which has important applications in efficient heat
collection, highly sensitive thermal sensing and others.Comment: 23 pages, 5 figure
1H-Pyrrole-2-carboxylic acid
In the title compound, C5H5NO2, the pyrrole ring and its carboxyl substituent are close to coplanar, with a dihedral angle of 11.7 (3)° between the planes. In the crystal structure, adjacent molecules are linked by pairs of O—H⋯O hydrogen bonds to form inversion dimers. Additional N—H⋯O hydrogen bonds link these dimers into chains extending along the a axis
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