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401
Key attributes of nitrocellulose-based energetic materials and recent developments
Published 2025-01-01“…The review also highlights the significant impact of nitrogen content, additives, and processing methods on the performance, stability, and safety of NC-infused propellants. While higher nitrogen content improves energetic output, it also increases surface cracking and gas production, necessitating the use of stabilizers and additives like Bu-NENA, copper compounds, and MgH2 to enhance flexibility, thermal stability, and reduce sensitivity to mechanical and thermal stimuli. …”
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402
Dynamic responses characteristics of bedrock and overburden layer slope with anchored frame piles based on shaking table test
Published 2025-02-01“…Abstract To adapt to higher and steeper slope environments, this paper proposes a new type of support structure called an anchored frame pile. …”
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403
Exploration on Formation Mechanism of Core Discing Based on Energy Analysis
Published 2022-01-01“…More energy must be dissipated when the core discing occurs under higher in situ stress conditions. It is preliminarily proved that the formation mechanism of core discing is that the tensile cracks extend and penetrate at the core stub, and the core is pulled off to form a core disc, which is reciprocating to produce core discing. …”
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404
Analysis of Microstructure and Performance of Cr<sub>3</sub>C<sub>2</sub>/Ni60A Coating on 45 Steel for Laser Cladding Piston Rod
Published 2025-01-01“…When the Cr<sub>3</sub>C<sub>2</sub> mass percentage reaches 45% and 55%, the coating surface exhibits a higher density of induced cracks due to the combined effects of microstructural changes and thermal influences. …”
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405
Effect and Mechanism of Action of Pushing Method on Rats with Skeletal Muscle Overuse Injury based on Wnt/β-catenin Signaling Pathway
Published 2024-01-01“…Catenin protein expression levels.Results(1) Comparison of motor function:compared with the blank group, the time of passing through the balance beam and the number of times of sliding paw were significantly increased in the model group and intervention group after intervention, and the difference was statistically significant (<italic>P</italic><0.05); compared with the model group, the time of passing through the paw and the number of times of sliding paw were significantly decreased in the intervention group after intervention, and the difference was statistically significant (<italic>P</italic><0.05). (2) Gastrocnemius muscle histopathological changes:the model group can be seen in the gastrocnemius muscle a large number of myocytes can be seen within the cracks, myogenic fibers fracture; compared with the model group, the degree of damage to the gastrocnemius muscle tissues in the intervention group to reduce the degree of damage, can be seen in the form of myofibers is regular, neatly arranged. (3) Ultrastructural changes in gastrocnemius muscle tissue:local myogenic fiber bundles were broken and dissolved, and a small amount of Z-line structure was dissolved and blurred; compared with the model group, the gastrocnemius muscle cells in the intervention group were slightly edematous, and the structure of the myogenic fiber bundles was clear; part of the myogenic fiber bundles were broken, and the structure of the Z-lines was clear and more neatly arranged. (4) Gastrocnemius muscle tissue MyoD, MyoG and Pax7 mRNA transcript levels:compared with the blank group, MyoD, MyoG and Pax7 mRNA transcript levels were significantly higher in both the model group and the intervention group (<italic>P</italic><0.05); compared with the model group, MyoD, MyoG and Pax7 mRNA transcript levels were significantly higher in the intervention group (<italic>P</italic><0.05). (5) Gastrocnemius muscle tissue MyoD, MyoG and Pax7 protein expression level:compared with the blank group, MyoD, MyoG and Pax7 protein expression water were significantly higher in both the model group and the intervention group (<italic>P</italic><0.05); compared with the model group, MyoD, MyoG and Pax7 protein expression level was significantly higher in the intervention group (<italic>P</italic><0.05). (6) Wnt3a, Axin2 and β-catenin protein expression levels in gastrocnemius muscle tissues:compared with the blank group, Wnt3a, Axin2 and β-catenin protein expression levels were significantly higher in both the model group and the intervention group (<italic>P</italic><0.05); compared with the model group, Wnt3a, Axin2 and β-catenin protein expression levels were significantly higher in the intervention group (<italic>P</italic><0.05).ConclusionPushing method can improve the gastrocnemius muscle injury and motor function in rats with overuse injury model, and its mechanism may be related to the activation of Wnt/β-catenin signaling pathway.…”
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406
Study of interfacial bonding properties and shrinkage deformation of cement-alkali activated gradient-structured composite in complex environments with temperature-humidity changes
Published 2025-02-01“…The early splitting strengths under the two extreme environmental effects increased and then decreased, and the maximum splitting strengths of OPCAAS were 2.66 MPa and 3.65 MPa under the temperature difference cycling and dry-wet cycling, respectively, which were 5.14% and 35.69% higher than those of OPC-AAMK, respectively. Scanning electron microscopy (SEM) characterization analysis showed that the temperature difference cycling resulted in more severe product decomposition of the AAMK cementitious material, and obvious cracks and holes appeared at the bonding interface of OPC-AAMK. …”
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407
Deformations and seepage-induced erosion of fractured rocks in fault under confined settings
Published 2025-01-01“…For samples with the same particle size distribution, those in the water-saturated state exhibited higher incremental strain than those in the dry state. …”
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408
The role of solar thermal hydrogen production technologies in future energy solutions: A review
Published 2025-01-01“…HTWE and solar methane cracking are the top choices for low environmental impact. …”
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409
Assessing Durability and Stability of Calcium Sulfoaluminate Cement-Stabilized Soils Under Cyclic Wet–Dry Conditions
Published 2025-01-01“…Similarly, UCS values for 5% and 7% cement content reduced from 666 kPa to 509 kPa and from 1587 kPa to 1331 kPa, respectively, indicating improved resilience with higher CSA content. The durability index was less affected during the first three cycles, but showed a more pronounced decline after five and seven cycles. …”
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410
Calculation Method of Overburden Damage Height Based on Fracture Mechanics Analysis of Soft and Hard Rock Layers
Published 2019-01-01“…The calculation accuracy of the proposed method was higher than that of the three conventional theoretical methods, and it effectively solved the limitation of the fracture analysis method without the inclusion of the soft rock layer in design and the distortion problem due to the residual bulking coefficient to be improperly used in simulation. (2) There was no noticeable fractures in the broken soft rock zone, and the whole fractures were mainly low-angle rupture; the fractures in hard rock layer had obvious ruptures and multiangle cracks, and the average fracture width of soft rock was 2.8 mm smaller than that of hard rock. …”
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411
Fruit Quality and Production Parameters of Some Bitter Cherry Cultivars
Published 2025-01-01“…Thus, the resistance to frost in the full flowering phenophase had an average value of 86.69%, and regarding the resistance to fruit cracking, the highest percentage was found in C<sub>1</sub>, with 99.79% unaffected fruits. …”
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412
Development and model test of dynamic loading system in mine goaf site for high-speed railway subgrade
Published 2024-12-01“…With the rapid advancement of the high-speed railway network, it is inevitable that some key lines will cross the mininggoaf site. This poses higher requirements for the construction, safe operation, and maintenance of high-speed railways. …”
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413
Seawater-originated fluids interactions with oceanic lithospheric mantle peridotites and formation of hornblendite dykes, as well as spadaite and dolomite veins in the Naein ophiol...
Published 2024-12-01“…In the hornblendites, the higher content of MgO contrasted to CaO reveals a considerable activity of Mg in circulation of hydrothermal fluids (Torabi et al., 2017). …”
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414
The Anisotropic Time-Dependent Properties and Constitutive Model Analysis of Carbonaceous Slate with Different Foliation Angles
Published 2024-12-01“…The <i>R</i><sup>2</sup> of the FNC model is larger than 0.965, which is higher than that of the Nishihara model (<i>R</i><sup>2</sup> ≤ 0.911). …”
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