Cilj rada je bio istražiti epidemiološka obilježja bolesnika s reumatoidnim artritisom (RA) na području srednje Dalmacije uz moguće izdvajanje zemljopisnih klastera. Anketari osposobljeni za ...provođenje telefonskog upitnika ispitali su podrijetlo 197 osoba oboljelih od RA koji su kontroliraju pri Odjelu za reumatologiju i kliničku imunologiju KBC-a Split. Za statističku analizu pojavnosti klastera primjenjen je Poisson-ov izračun vjerojatnosti. Potvrđena su četiri klastera, od kojih je najveći zabilježen na području Sinjske krajine. Omjer žena naspram muškaraca bio je 5,79:1. Najveći broj oboljelih od RA pripadao je dobnoj skupini od 50 do 59 godina starosti (30,45 %). Rezultati ukazuju na varijacije unutar regije s istaknutim klasterima RA u sjevernom dijelu srednje Dalmacije, što upućuje na postojanje posebnih genetskih ili okolišnih čimbenika. Učestalost bolesti u žena naspram muškaraca bila je veća u odnosu na dosadašnja izvješća, dok je zahvaćenost dobnih skupina 50-59 bila sukladna podacima iz novije literature.
Bellova pareza ili periferna idiopatska pareza facijalisa, neurološko je stanje koju karakterizira jednostrana slabost mišića lica. Smjernice za liječenje su uglavnom utemeljene na dokazima o ...preporukama za liječenje akutnih stadija Bellove pareze. Međutim, kronični slučajevi Bellove pareze nisu potkrijepljeni dovoljno snažnim dokazima o mogućnostima liječenja, osim slabe preporuke u smjeru primjene terapijskih vježbi. Ovaj prikaz slučaja predstavlja primjenu kombinacije modaliteta fizikalne terapije (akupunktura, laser visokog intenziteta i terapija zrcalom) unutar 10 tjedana, za liječenje bolesnika s dugotrajnim posljedicama Bellove pareze. Ova kombinacija terapija rezultirala je značajnim poboljšanjem razine oporavka mjerenog kliničkim ljestvicama. Međutim, potrebna su daljnja istraživanja kako bi se pružili snažniji dokazi o prednostima ove kombinacije terapija.
Single wall carbon nanotubes (SWCNTs) were exposed to gamma radiation,
absorbing the doses of 25, 50 and 100 kGy in aqueous environment. After the
irradiation treatment, the changes in the structure ...were studied using
Fourier Transform Infrared and Raman spectroscopy, thermogravimetric analysis
and atomic force microscopy. Fourier Transform Infrared Spectroscopy has
shown that the irradiation of SWCNTs in aqueous environment leads to covalent
functionalization of SWCNTs. The irradiation of water leads to its radiolysis
and the formation of free radical species of different types. These species
react with nanotube sidewalls and in such way carboxylic and hydroxylic
groups are covalently bonded to the sidewalls of SWCNTs. Thermogravimetric
analysis was used to estimate the total amount of covalently bonded groups.
The highest ratio of covalently bonded groups appears in nanotubes irradiated
with the 100 kGy dose. Raman spectroscopy proves that the increase in
irradiation doses leads to an increase of structural disorder of SWCNTs,
presumably in the form of defects in carbon nanotube walls. Examination of ID
to IG ratio shows a three times larger degree of structural disorder after
the irradiation treatment with 100 kGy. The analysis of carbon nanotube Raman
spectra RBM bands determined the presence of both semiconducting and metallic
carbon nanotubes after gamma irradiation treatment. These measurements prove
that gamma irradiation treatments have a nonselective effect regarding
different chirality and therefore conductance of nanotubes. Atomic force
microscopy shows a significant carbon nanotube shortening as the effect of
gamma radiation treatment. Nanotubes with length between 500 nm and 1 ?m are
predominant.
nema
Single wall carbon nanotubes (SWCNTs) were exposed to gamma radiation, absorbing the doses of 25, 50 and 100 kGy in aqueous environment. After the irradiation treatment, the changes in the structure ...were studied using Fourier Transform Infrared and Raman spectroscopy, thermogravimetric analysis and atomic force microscopy. Fourier Transform Infrared Spectroscopy has shown that the irradiation of SWCNTs in aqueous environment leads to covalent functionalization of SWCNTs. The irradiation of water leads to its radiolysis and the formation of free radical species of different types. These species react with nanotube sidewalls and in such way carboxylic and hydroxylic groups are covalently bonded to the sidewalls of SWCNTs. Thermogravimetric analysis was used to estimate the total amount of covalently bonded groups. The highest ratio of covalently bonded groups appears in nanotubes irradiated with the 100 kGy dose. Raman spectroscopy proves that the increase in irradiation doses leads to an increase of structural disorder of SWCNTs, presumably in the form of defects in carbon nanotube walls. Examination of ID to IG ratio shows a three times larger degree of structural disorder after the irradiation treatment with 100 kGy. The analysis of carbon nanotube Raman spectra RBM bands determined the presence of both semiconducting and metallic carbon nanotubes after gamma irradiation treatment. These measurements prove that gamma irradiation treatments have a nonselective effect regarding different chirality and therefore conductance of nanotubes. Atomic force microscopy shows a significant carbon nanotube shortening as the effect of gamma radiation treatment. Nanotubes with length between 500 nm and 1 μm are predominant.
Different components of interpenetrating polymer networks (IPNs) have different influence on their properties and their behavior in various applications, such as automotive dual curing applications. ...Dual curing systems, upon hardening, can give interpenetrating polymer networks (IPNs). UV–thermal dual‐cure process that was used to obtain IPNs consisted of an UV curable acrylic component and a classic 2‐pack urethane component. Novel acrylate‐terminated hyperbranched polyester with high functionality HBP(A) was used as part of the acrylic component, which was cured by UV radiation. The urethane part of the IPNs was classical 2‐pack polyurethane and it was crosslinked by heating.The aim was to explore the influence of thermosetting resin HBP(A) on IPN properties. First, the weight ratio of HBP(A) and a reactive diluent 2‐ethyl hexyl acrylate (EHA) in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. Then, the IPN with 50/50 weight ratio in acrylic component was used to investigate the influence of the reactive diluent in IPNs on their behavior, but also to see more clearly the role of the HBP(A) component. All the IPNs were also compared to a classical 2‐pack polyurethane clear coat consisted of a hydroxyl functional acrylate copolymer (HA) and Desmodur®N3390.The IPNs were characterized by dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated.DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the T
g
values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.
Sredinom 2004. godine epidemiološka služba Zavoda za javno zdravstvo grada Zagreba registrirala je nekoliko slučajeva sifilisa kod nekoliko mlađih muških osoba. U toku 2004.i 2005. godine koristeći ...podatke sa prijava zaraznih bolesti, epidemioloških anketa, te podatke laboratorija za dijagnostiku sifilisa registrirali smo ukupno 49 oboljelih dok za još 9 osoba postoji sumnja o oboljenju na temelju serološkog statusa no oni su epidemiološkoj službi ostali nedostupni. Prethodnih 10 godina broj oboljelih u Zagrebu bio je manji od 10 slučajeva godišnje. Prvooboljeli muškarac, homoseksualac, navodi spolni kontakt s partnerom s područja EU. 90% oboljelih su muškarci mlađih dobnih skupina prosječne dobi 33,2 godine. Samo trećina oboljelih prihvatila je testiranje na HIV, B- i C- hepatitis te smo među njima registrirali jednog HIV+.Zahvaljujući podacima iz laboratorija za dijagnostiku sifilisa registrirali smo 50% više slučajeva nego što je bilo prijavljeno prijavom zarazne bolesti(24). Prijavljivanje iz laboratorija koji vrše dijagnostiku omogućilo bi bolji nadzor nad sifilisom i ostalim SPB.
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