background: aeromonas species are gram-negative ubiquitous bacteria, facultative anaerobic rods that infect both invertebrates and vertebrates. various fish species develop hemorrhagic disease and furunculosis due to aeromonas spp. aeromonas strains generate certain active compounds such as siderophores, which are the final products of non-ribosomal peptide synthetase (nrps) activity. the prese...

The N-heterocyclic carbene catalyzed annulation of benzofuran-2,3-diones and enals via homoenolate intermediates is described. The reaction provided a direct and efficient method for the synthesis of spiro-bis-lactones. The ketone-carbonyl group annulated products and the ester-carbonyl group annulated products can be obtained as major products with good yields by convenient catalyst regulation...

This work describes a study into thiol–ene based Michael addition reactions. Different catalysts, primary and tertiary amines and phosphines, were investigated for the reaction of a range of thiols with dimers and oligomers of some (meth)acrylates. Primary and tertiary amines are efficient catalysts for the thiol–ene reaction, although these catalysts require several hours to reach high convers...

Ultrasound is one of the most widely used multipurpose imaging modalities that is ideal for monitoring and diagnosing early pregnancy events. The first sign and measurable element of an early pregnancy is the Gestational Sac (GS). Currently, the size of GS is manually measured from an ultrasound image of the GS. This paper argues that the Mean Sac Diameter (MSD) derived from the manual measurem...

The profit of a retail product not only comes from its own sales, but also comes from its influence on the sales of other products. How to promote the right products to the right customers becomes one of the key issues in marketing. In this paper, we propose a new formulation of promotion value by considering cross-selling effects within selected products and customers, which were largely ignor...