Strong electron-phonon coupling in magic-angle twisted bilayer graphene.

The unusual properties of superconductivity in magic-angle twisted bilayer graphene (MATBG) have sparked considerable research interest. However, despite the dedication of intensive experimental efforts and the proposal of several possible pairing mechanisms, the origin of its superconductivity remains elusive. Here, by utilizing angle-resolved photoemission spectroscopy with micrometre spatial resolution, we reveal flat-band replicas in superconducting MATBG, where MATBG is unaligned with its hexagonal boron nitride substrate.

Nutritional Quality Analysis and Classification Detection of Buckwheat in Different Harvest Periods.

For buckwheat, the optimal harvest period is difficult to determine-too early or too late a harvest affects the nutritional quality of buckwheat. In this paper, physical and chemical tests are combined with a method using near-infrared spectroscopy nondestructive testing technology to study buckwheat harvest and determine the optimal harvest period. Physical and chemical tests to determine the growth cycle were performed at 83 days, 90 days, 93 days, 96 days, 99 days, and 102 days, in which the buckwheat grain starch, fat, protein, total flavonoid, and total phenol contents were assessed.

Assessment of the Ecological Compensation Standards for Cross-Basin Water Diversion Projects from the Perspective of Main Headwater and Receiver Areas.

This paper aims to explore how to develop reasonable ecological compensation standards to improve the effectiveness of water diversion projects. Watershed ecological compensation is an important means to coordinate watershed protection and development and, additionally, compensation standard accounting is the core issue of ecological compensation. The previous literature has mainly calculated watershed ecological compensation standards from a single perspective, such as the main headwater or receiver areas, meaning the interests of another under-appreciated area would inevitably be ignored.

Alkali etching zinc and manganese silicates derived from natural green algaes for supercapacitors with enhanced electrochemical properties.

A facile novel method of alkali etching was proposed to enhance the application of metal-silicates in supercapacitors. First, 3D N, S, P-doped C-zinc-silicate (C-ZnSi), and C-manganese-silicate (C-MnSi) were derived from calcined green algaes (GAs) in a N atmosphere. Second, the synthesized products were soaked in a 3.

Rice-like and rose-like zinc silicates anchored on amorphous carbon derived from natural reed leaves for high-performance supercapacitors.

3D N, S, P-doped rice-like C-Zn4Si2O7(OH)2·H2O (C-ZnSi-N2) and rose-like C-Zn2SiO4 (C-ZnSi-CO2) are derived from reed leaves and used for application in supercapacitors. The as-prepared C-ZnSi architectures with a large number of hierarchical pores and high specific surface area from reed leaves have outstanding electrochemical performance. The obtained C-ZnSi-N2 shows 341 F g-1 at the current density of 0.

Compression Characteristics and Microscopic Mechanism of Coastal Soil Modified with Cement and Fly Ash.

It is of great significance to study the consolidation characteristics of modified coastal cement-soil. A one-dimensional consolidation test and microscopic test were carried out. In the tests, the cement content was 20%, fly ash content was 0%, 5%, 10%, 20%, and 30%, and the water content was 80%.

An injectable supramolecular self-healing bio-hydrogel with high stretchability, extensibility and ductility, and a high swelling ratio.

Reversible networks are a key factor for designing self-healing hydrogels with high stretching properties. To achieve that, it is often necessary to modify or graft functional groups to the main chains for inducing the formation of reversible covalent-bond-based chemical cross-linking or hydrogen-bond-based physical cross-linking, thus leading to a complicated chemical process and high cost. Here, we proposed a dynamic sliding physical crosslinking mechanism of chains to design and synthesize hydrogels with both good self-healing ability and extensibility by introducing interstitial phases of small organic molecules into the hydrogel networks to enhance hydrogen bonds, which has been proved to be a quite facile and practical approach to achieve stretchable and self-healing properties.

Hybrid use of combined and sequential delivery of growth factors and ultrasound stimulation in porous multilayer composite scaffolds to promote both vascularization and bone formation in bone tissue engineering.

In this study, a multilayer coating technology would be adopted to prepare a porous composite scaffold and the growth factor release and ultrasound techniques were introduced into bone tissue engineering to finally solve the problems of vascularization and bone formation in the scaffold whilst the designed multilayer composite with gradient degradation characteristics in the space was used to match the new bone growth process better. The results of animal experiments showed that the use of low intensity pulsed ultrasound (LIPUS) combined with growth factors demonstrated excellent capabilities and advantages in both vascularization and new bone formation in bone tissue engineering. The degradation of the used scaffold materials could match new bone formation very well.

Porous nanoapatite scaffolds synthesized using an approach of interfacial mineralization reaction and their bioactivity.

There is a growing interest in the use of calcium phosphate, used to fabricate porous scaffolds for bone tissue regeneration and repair. However, it is difficult to obtain interconnected pores with very high porosity and to engineer the topography of the pore walls for calcium phosphate ceramic scaffolds. In this study, a novelty method interfacial mineralization reaction was used to fabricate porous nano-calcium phosphate ceramic scaffolds with three-dimensional surface topography of walls, which was tuned using different surfactants; using this method, porous scaffolds with different shapes were obtained, which demonstrates that interfacial mineralization reaction is not only a good method to prepare porous ceramic scaffolds of calcium phosphate but also an efficient approach to engineer the topography of the pore walls.

[Bio-mechanical evaluation of extreme lateral transforaminal lumbar interbody fusion].

Objective: To evaluate the feasibility and post-operation stability of extreme lateral transforaminal lumbar interbody fusion (E-TLIF) and other traditional surgical approach via bio-mechanical test.

Methods: There were 24 normal lumbar spine segment of swine were divided into the following four groups: control group, standard group (internal fixed with pedicle screws only), transforaminal lumbar interbody fusion (TLIF) group and E-TLIF group. The specimen in anteflect, hypsokinesis, lateral flexion and rotate movements were tested respectively with bio-mechanical devices to study on the load-straining changes and biomechanics index.

Astragalus Improved Cardiac Function of Adriamycin-Injured Rat Hearts by Upregulation of SERCA2a Expression.

The traditional Chinese medical herb Astragalus, the dried root of Astragalus membranaceus (Fisch.) Bge., has been widely applied to treat patients with cardiovascular disease in China and has profound cardioprotective effects.

[Effects of Astragalus membranaccus on cardiac function and SERCA2a gene expression in myocardial tissues of rats with chronic heart failure].

Objective: To investigate the effects of Astragalus membranaccus (As) on cardiac function and SERCA2a gene expression in left ventricular tissues of rats with chronic heart failure.

Methods: Heart failure was induced by clipping the abdominal aorta 60 male SD rats were divided into four groups: sham-operated (Sham), aortic stenosis (Model), Model + As (20 g/kg) and Model + Captopril (0.05 g/kg).