Density Functional Tight-Binding Models for Band Structures of Transition-Metal Alloys and Surfaces across the -Block.

First-principles electronic structure simulations are an invaluable tool for understanding chemical bonding and reactions. While machine-learning models such as interatomic potentials significantly accelerate the exploration of potential energy surfaces, electronic structure information is generally lost. Particularly in the field of heterogeneous catalysis, simulated electron band structures provide fundamental insights into catalytic reactivity.

[The use of somatostatin in the therapy of acute pancreatitis].

The authors report their experience in the use of somatostatin in severe acute pancreatitis. From 1985 to 1990, 169 patients with severe acute pancreatitis have been observed in the Surgery Division of "S. Andrea" Hospital in Vercelli.

[Perioperative treatment with thymostimulin in patients with stomach and colorectal neoplasms. Our experience with 114 cases].

The authors report their experience about the use of the timostimoline in the perioperative time in 114 cases of gastric and rectum cancer. They think that this method can be of help for neoplastic patients about the time of surgical stress.

[Observations in sclerosing cholangitis].

Sclerosing cholangitis is a rare liver disease of unknown etiology with a slow but progressive course. The authors report their experience and illustrate some surgical procedures to preserve bile duct patency in view of a liver transplantation program.

[Our experience in the use of somatostatin in upper digestive hemorrhages].

The paper illustrates the Authors' personal experience of the use of somatostatin in high digestive hemorrhages. Endoscopy continues to be the principal method for hemorrhage diagnosis and therapy and the additional use of somatostatin undoubtedly accelerates recovery by blocking gastric and pancreatic secretions and blood flow at the splanchnic level.