Antibacterial lanostane triterpenoids from .

A phytochemical investigation on the 80% EtOH extract of the fruiting bodies of resulted into the isolation of two previously undescribed lanostane triterpenoids, 7,11-dioxo-3-acetyloxy-26,27-dihydroxy-lanosta-8,24-diene () and 7,20-dioxo-3-acetyloxy-1115-dihydroxy-22,23,24,25,26,27-hexanorlanosta-8-ene (), togeher with one known lanostane triterpenoid ganodermanontriol (). Structural elucidation of all the compounds were performed by spectral methods such as 1D and 2D (HH COSY, HMQC, and HMBC) NMR spectroscopy. All the triterpenoids were evaluated for their antibacterial activities against six pathogenic microorganisms.

Adhesion Properties of Recycled High-Viscosity Asphalt-Aggregate Interface under Dynamic Water Erosion.

The drainage of asphalt pavement requires the use of a large amount of high-viscosity-modified asphalt, which faces the service environment under dynamic water erosion. The feasibility of recycling high-viscosity-modified asphalt should be investigated to facilitate sustainable infrastructure construction. This study used ultrasonic equipment to simulate dynamic water erosion test conditions and tested the adhesion performance of different types of recycled high-viscosity asphalt at various environmental temperatures.

Experimental and Numerical Investigation of Joints for a Pultruded Fiber-Reinforced Polymer Truss.

Bolted connections usually govern the structural rigidity and load-carrying capacity of pultruded glass fiber-reinforced polymer (GFRP) truss structures. In this study, a novel bolted integrated gusset plate (IGP) connection is proposed to enhance the stiffness and capacity of GFRP truss structures. Nine double-lap shear tests of GFRP joints and numerical simulation were conducted to investigate the influence of variable design parameters of the bolted GFRP joints (number of bolts, width and thickness of GFRP, edge distance of bolts, and the employment of adhesive).

Influence of the Cross-Sectional Shape and Corner Radius on the Compressive Behaviour of Concrete Columns Confined by FRP and Stirrups.

Axial compression tests were carried out on 72 FRP (fiber reinforced polymer)-stirrup composite-confined concrete columns. Stirrups ensure the residual bearing capacity and ductility after the FRP fractures. To reduce the effect of stress concentration at the corners of the confined square-section concrete columns and improve the restraint effect, an FRP-stirrup composite-confined concrete structure with rounded corners is proposed.

Compressive Behavior of Bamboo Sheet Twining Tube-Confined Concrete Columns.

This study experimentally investigated various axial compressive parameters of a new type of confined concrete, which is termed bamboo sheet twining tube-confined concrete (BSTCC). This new composite structure was composed of an outer bamboo composite tube (BCT) jacket and a concrete core. Under axial compression, the parameters of thirty-six specimens include concrete strength (i.

What is the role of the nitrate reductase (euknr) gene in fungi that live in nitrate-free environments? A targeted gene knock-out study in Ampelomyces mycoparasites.

Mycoparasitic fungi can be utilized as biocontrol agents (BCAs) of many plant pathogens. Deciphering the molecular mechanisms of mycoparasitism may improve biocontrol efficiency. This work reports the first functional genetic studies in Ampelomyces, widespread mycoparasites and BCAs of powdery mildew fungi, and a molecular genetic toolbox for future works.

Isolated From Austrian Soil With High Potential for Biotechnological Application.

Fungi of the genus are of high importance for biotechnological applications, in biocontrol and for production of homologous and heterologous proteins. However, sexual crossing under laboratory conditions has so far only been achieved with the species , which was so far only isolated from tropical regions. Our isolation efforts aimed at the collection of strains from Austrian soils surprisingly also yielded 12 strains of the species , which was previously not known to occur in Europe.

NO and N O transformations of diverse fungi in hypoxia: evidence for anaerobic respiration only in Fusarium strains.

Fungal denitrification is claimed to produce non-negligible amounts of N O in soils, but few tested species have shown significant activity. We hypothesized that denitrifying fungi would be found among those with assimilatory nitrate reductase, and tested 20 such batch cultures for their respiratory metabolism, including two positive controls, Fusarium oxysporum and Fusarium lichenicola, throughout the transition from oxic to anoxic conditions in media supplemented with . Enzymatic reduction of (NIR) and NO (NOR) was assessed by correcting measured NO- and N O-kinetics for abiotic NO- and N O-production (sterile controls).

Inhibition of MiR-92a May Protect Endothelial Cells After Acute Myocardial Infarction in Rats: Role of KLF2/4.

BACKGROUND This study was designed to investigate the effects of microRNA-92 (miR-92), Kruppel-like factor 2 (KLF2), and Kruppel-like factor 4 (KLF4) on endothelial injury after acute myocardial infarction (AMI). MATERIAL AND METHODS Blood samples were collected from 50 AMI patients for detection of cardiac troponin I (cTnI), heart-type fatty acid-binding protein (H-FABP), and von Willebrand factor (vWF). The Sprague-Dawley rat models of AMI (n=30) were established by ligating their left anterior descending coronary artery.