Transkranijski Doppler kod tuberkuloznog meningitisa: prikaz slučaja

Tuberculous meningitis has a highly variable presentation. Difficulties in establishing the diagnosis of tuberculous meningitis have been well recognized. Unusual manifestations of tuberculous meningitis are nowadays quite frequently seen, with an increasing incidence of the disease in the general neurology practice. A 44-year-old woman presented with progressive loss of vision on the left eye in the past two days and two episodes of seizures (partial and secondary generalized). One week before that, she had transient diplopia, blurred right vision, and gait unsteadiness. There was no past history of systemic tuberculosis. Transcranial Doppler findings first suggested that it was a basal pathologic process with vascular involvement, which was not clear from clinical history and examination, computed tomography or angiography findings. Our opinion is therefore that every case of specific meningitis, infectious retrobulbar neuritis and opticochiasmatic arachnoiditis should be additionally examined with transcranial Doppler. Thus, more reliable information concerning complications due to specific arteritis could be obtained.Tuberkulozni meningitis pokazuje velike razlike u manifestaciji. Dobro su poznate teškoće u postavljanju dijagnoze tuberkuloznog meningitisa. Danas se vrlo često bilježe neuobičajene manifestacije tuberkuloznog meningitisa, uza sve veću incidenciju ove bolesti u općoj neurološkoj praksi. Žena u dobi od 44 godine primljena je s progresivnim gubitkom vida na lijevom oku kroz prethodna dva dana i dvjema epizodama konvulzija (djelomične i sekundarne generalizirane). Tjedan dana prije toga imala je prolazne dvoslike, zamagljen vid i nesiguran hod. Nije imala anamnezu sistemske tuberkuloze. Nalaz transkranijskog Dopplera je bio prvi koji je ukazao na to da se radi o bazalnom patološkom procesu sa zahvaćenim krvnim žilama, što nije bilo jasno iz kliničke anamneze i pregleda, kao ni iz nalaza kompjutorizirane tomografije i angiografije. Stoga je naše mišljenje da pregled transkranijskim Dopplerom treba provesti u svakom slučaju specifičnog meningitisa, infektivnog retrobulbarnog neuritisa i optikohiazmatskog arahnoiditisa. Time bi se dobili pouzdaniji podaci o komplikacijama uzrokovanim specifičnim arteritisom

Montmorillonite modified by CNx supported Pt for methanol oxidation

A composite support based on nature clay, i.e. montmorillonite (MMT), shows great promise as support materials for Pt electrocatalyst for the methanol oxidation reaction in fuel cell anodes. The reported composite support (CNx-MMT) was prepared via carbonizing MMT which was covered by N-contented polymer. X-ray diffraction and transmission electron microscopy results showed that Pt nanoparticles can be well-dispersed on the composite support with highly dispersed tiny crystal Pt nanoparticles. Cyclic voltammetry measurements showed that the Pt/CNx-MMT has the enhanced electrocatalytic activity in methanol oxidation reaction. The developed Pt catalyst supported on new composite support is catalytically more active for methanol electrooxidation than Pt supported on the conventional carbon support and shows good stability, offering promising potential for application of MMT as support for fuel cell electrocatalysis.Web of Scienc