Efficient Recycling of Waste Rubber in a Sustainable Fiber-Reinforced Mortar and its Damping and Energy Dissipation Capacity

A Great Number of Waste Tires Are Discarded in Landfills, Occupying Land Resources, and Severely Endangering the Ecosystem. Upcycling These Wastes as Aggregates to Partially Substitute Natural Sand and Develop Structure-Function Integration in Concrete Structures is a Desirable Solution. in This Study, a Sustainable Fiber-Reinforced Rubberized Mortar with Superior Material Damping and Moderate Strength is Developed by Combined Use of Waste Crumb Rubber (WCR) Incorporated at 0, 30%, and 60%, by Volume of Sand, and Polyvinyl Alcohol (PVA) Fiber Added at 0, 0.5%, and 1%, by Volume, in a High-Volume Fly Ash Binder System. Low-Temperature Plasma (LTP) Pre-Treatment of the WCR Was Applied to Compensate for Strength Loss Resulting from the Incorporation of a Large Portion of the WCR, Which Increases the Recycling Efficiency of the WCR. the Macro Tests of Static and Dynamic Mechanical Properties Were Used to Characterize the Material Damping and Energy Dissipation Capacity, Followed by Microstructural Tests to Evaluate the Enhanced Damping Mechanisms. Test Results Show that the Combination of 60% LTP Pre-Treated WCR and 1% PVA Fiber Can Secure the Highest Damping Capacity and Energy Dissipation Ratio Without a Significant Strength Drop. the Use of Discarded WCR is Therefore Promising to Substitute Conventional Sand and Design Functionalized Intrinsic Viscoelastic Cement Composites that Can Be Adopted in Anti-Vibrational Technology Applications

(3aR*,6S*,7S*,7aR*)-2-(4-Methoxy­benz­yl)-7-(4-nitro­phen­yl)-6-phenyl-3a,6,7,7a-tetra­hydro­isoindolin-1-one

The title compound, C28H26N2O4, crystallizes as a racemate with four stereogenic centers. In the molecule, the pyrrolidone ring adopts an envelope conformation and the cyclo­hexene ring has a twisted envelope conformation. In the crystal structure, mol­ecules are linked by weak inter­molecular C—H⋯O hydrogen bonds

Synergistic Effect of HEDP.4Na and Different Induced Pouring Angles on Mechanical Properties of Fiber-Reinforced Alkali-Activated Slag Composites

The Poor Flexural and Damping Properties of Building Materials Damages Concrete Structures and Affects their Service Life When Concrete Structures Are Subjected to Dynamic Loads. Three Different Dosages (I.e., 0%, 0.3%, and 0.6%) of Organic Phosphonates (HEDP.4Na) and Different Pouring Methods (I.e., Conventional Pouring Method, 90°-Induced Pouring Method, and 150°-Induced Pouring Method) Were Designed to Improve the Flexural and Damping Performance of Fiber-Reinforced Alkali-Activated Slag Composites (FR-AASC). the Enhanced Mechanism of HEDP.4Na Was Revealed by Phase Analysis (X-Ray Diffraction, XRD), Pore Structure Analysis (Mercury Intrusion Porosimetry, MIP), the Heat of Hydration, and Scanning Electron Microscopy (SEM) Analysis. the Results Showed that 0.3% HEDP.4Na Combined with the 150°-Induced Pouring Angle Can Significantly Improve the Mechanical Properties of the FR-AASC Sample Compared with the Reference Group. the Sample with 0.3% HEDP.4Na Cast by the 150°-Induced Pouring Angle Increased Compressive and Flexural Strength, Damping Energy Consumption and Storage Modulus by 20%, 60%, 78%, and 30%, Respectively, Compared with the Reference Sample Cast by the Conventional Pouring Methodology. HEDP.4Na Reduced the Early Hydration Heat and Total Porosity of the FR-AASC Matrix, Modified the Fiber–matrix Interface Transition Zone, and Increased the Frictional Energy Consumption of Steel Fibers. overall, the Synergistic Effect of HEDP.4Na and the Induced Pouring Methodology Significantly Improved the Flexural and Damping Properties of FR-AASC. This Study Can Provide a Guidance for Improving the Flexural and Damping Capacity of FR-AASC and Promote the Application of FR-AASC in Construction Engineering

3-(4-Meth­oxy­benzyl­idene)-1,5-dioxa­spiro­[5.5]undecane-2,4-dione

In the title mol­ecule, C17H18O5, which was prepared by the reaction of (R)-1,5-dioxaspiro­[5.5]undecane-2,4-dione and 4-meth­oxy­benzaldehyde with ethanol, the 1,3-dioxane ring is in a distorted envelope conformation with the spiro C atom forming the flap. The crystal structure is stabilized by weak inter­molecular C—H⋯O hydrogen bonds

Characterization of porcine ENO3: genomic and cDNA structure, polymorphism and expression

In this study, a full-length cDNA of the porcine ENO3 gene encoding a 434 amino acid protein was isolated. It contains 12 exons over approximately 5.4 kb. Differential splicing in the 5'-untranslated sequence generates two forms of mRNA that differ from each other in the presence or absence of a 142-nucleotide fragment. Expression analysis showed that transcript 1 of ENO3 is highly expressed in liver and lung, while transcript 2 is highly expressed in skeletal muscle and heart. We provide the first evidence that in skeletal muscle expression of ENO3 is different between Yorkshire and Meishan pig breeds. Furthermore, real-time polymerase chain reaction revealed that, in Yorkshire pigs, skeletal muscle expression of transcript 1 is identical at postnatal day-1 and at other stages while that of transcript 2 is higher. Moreover, expression of transcript 1 is lower in skeletal muscle and all other tissue samples than that of transcript 2, with the exception of liver and kidney. Statistical analysis showed the existence of a polymorphism in the ENO3 gene between Chinese indigenous and introduced commercial western pig breeds and that it is associated with fat percentage, average backfat thickness, meat marbling and intramuscular fat in two different populations