An Experimental Study of Zinc Evaporation from Bottom Zinc Dross at Atmospheric Pressure and in Inert Atmosphere with Integrated CFD Modelling.

In the present study, the recycling process of bottom zinc dross was performed by evaporation and subsequent condensation at 800 °C for 30 min with an observed argon flow rate of 100-400 mL/min to ensure an inert atmosphere, to observe the evaporation rate and final form of the product. Under the set conditions of over 98% zinc purity, products in the form of nanofibres (thickness 500 nm), powder (size of spherical particles 2-5 μm), dendrites, and metallic forms were obtained. The employed mathematical modelling (via Ansys 2023R1 software) predicted the behaviour of the argon flow current in the quartz tube, as well as the temperature gradient in the quartz tube and in the close vicinity of the zinc sample.

Neurologic disorders in HIV-positive orphans: 10 years of follow up.

Objective: Neuropsychic manifestations of AIDS are still noticeable especially in developing countries. The aim of this short communication is to describe psychological, behavioral and neurologic disorders caused by either HIV-related disorders, or drug related toxicities in HIV-infected children from Cambodia (Phnom Penh, Sihanoukville) treated during 10 years with highly active antiretroviral therapy (HAART).

Methods: One hundred and thirty seven (137) HIV-positive children (age 2-19 years) treated with HAART since 2003 (6-10 years follow up) have been analyzed concerning opportunistic infections, other co-infections, renal parameters, hematologic parameters, chest X-ray, antiretroviral treatment, anti-tuberculotics and antibiotics treatment.

Meningitis in diabetic patients.

Community acquired bacterial (CBM) meningitis in diabetic patients was analyzed for risk factors and outcome in a cohort of 201 cases of meningitis within last 17 years: 15 patients with diabetes mellitus and meningitis were identified and compared for etiology and mortality as well as for neurologic sequellae with all CBM cases.

Meningococcal meningitis is still the commonest neuroinfection in the community in tropics: overview of 62 cases.

Within last 17 years we went through all charts of bacterial meningitis within our nationwide survey and among 372 cases we found 62 cases of MM, in 12 cases with meningococcal disease (with shock, petechial effusions or disseminated intravascular coagulation or digital gangrenes). MM was usually observed in young adults without any of investigated risk factors like neoplasia, ENT (ear, nose, throat) focuses, elderly age, sepsis, diabetes, alcoholism, trauma, neonatal VLBW etc. Trauma, diabetes mellitus, alcohol abuse and chronic sinusitis/otitis were significantly less frequently found as a risk factor for MM.