A DFT investigation on structural, electronic, magnetic, optical, elastic and hydrogen storage properties of Ru-based hydride-perovskites XRuH3 (X = Cr, V, Ni).

The present investigation delves into various physical properties exhibited by CrRuH3, VRuH3 and NiRuH3. Notably adopting a stable cubic configuration, both compounds manifest a distinct metallic demeanor characterized by an absolute absence of band gap. In-depth analysis through Total Density of States (TDOS) and Partial Density of States (PDOS) justify this metallic conduct by distinctly showcasing peak conductivity at the Fermi level. The materials' magnetic behavior reveals an antiferromagnetic disposition for CrRuH3 and NiRuH3, while their intrinsic attributes emerge as anisotropic and rigid. Applying Poisson's ratio (ν) and the B/G ratio, all investigated compounds show ductility, but the CrRuH3 is superior among them. The heightened values of Young's modulus, Bulk modulus, and mean shear modulus observed in CrRuH3 underscore its enhanced rigidity as compared to VRuH3 and NiRuH3. Within the optical realm, CrRuH3 displays notable optical conductivity and absorption, particularly within the lower energy spectrum. Remarkably, at 0 eV, CrRuH3 showcases elevated reflectivity and refractive index as compared to the other investigated materials. On the hydrogen storage front, XRuH3 (X = Cr, V, Ni) exhibit promising potential, yet CrRuH3 emerges as the more favorable candidate for hydrogen storage applications.

Disseminated Blastomycosis in an Immunocompetent Patient.

Blastomycosis is caused by Blastomyces dermatitidis, which is endemic in certain areas in North America. It usually causes lung infection, and it can disseminate to other organs in immunocompromised individuals. Common sites for dissemination include skin, central nervous system (CNS), and bone. Dermatological spread is the commonest site for extrapulmonary spread. The diagnosis can be easily missed due to nonspecific presentation and variable dermatological presentations. Treatment is necessary even if the patient has improvement in symptoms without previous treatment. We present a case of disseminated blastomycosis in a 40-year-old male without known risk factors that went undiagnosed for over a year.

Brown Recluse Spider Bite Resulting in Coombs Negative Hemolytic Anemia in a Young Male Requiring Blood Transfusion.

Spider bites, including the bites of recluse spiders (Loxosceles, also known as brown spiders), usually lead to local symptoms; however, severe systemic symptoms have also been reported in the literature. Management of spider bites is based on symptoms. In severe cases involving the development of angioedema, hemolytic anemia, skin necrosis with superimposed bacterial infection or disseminated intravascular coagulation, antibiotics, steroids, blood transfusions, and plasma exchange may also play a role. We present a case of a brown recluse spider bite resulting in symptomatic hemolytic anemia and jaundice requiring blood transfusion.

Mycotic Aneurysms and Recurrent Intracranial Hemorrhages in a Patient With Infective Endocarditis.

The increase in the use of IV drugs has been accompanied by an increase in the incidence of infective endocarditis (IE). The clinical picture, vitals, examination, blood cultures, laboratory tests, and imaging can help diagnose IE. The Duke criteria also play a role in the diagnosis of IE. Prolonged antibiotic use and even interventions may be needed in the management of specific cases. Rare complications such as mycotic aneurysms and intracranial hemorrhages can be fatal and must be promptly addressed to prevent loss of life and serve debilitation in these patients.