Nova vrsta iz roda Cephennodes Reitter, 1883 iz Tajlanda (Coleoptera, Staphylinidae, Scydmaeninae)

A new species Cephennodes (s. str.) vegrandis sp. nov. of the tribe Cephenniini is described from Thailand; the aedeagus of the species is illustrated.U radu se opisuje nova vrsta Cephennodes (s. str.) vegrandis sp. nov. iz tribusa Cephenniini iz Tajlanda; ilustriran je edeagus vrste

Lathrobium joncooteri, novo ime za Lathrobium cooteri Stevanović, Hlaváč & Pavićević (Coleoptera, Staphylinidae, Paederinae)

A new name, Lathrobium joncooteri, is proposed for Lathrobium cooteri Stevanović, Hlaváč & Pavićević, 2008, a primary homonym of L. cooteri Watanabe 1999.Novo ime, Lathrobium joncooteri, predlaže se za vrstu Lathrobium cooteri Stevanović, Hlaváč & Pavićević, 2008, primarni homonim vrste L. cooteri Watanabe 1999

Optimizacija zapremine radioaktivnog obeleživača pri merenju zapreminskog protoka u zatvorenim cevovodima

In chemical processes it is essential that the flow in the process is accurately defined. Fluid velocity measurements are important for fluid flow quality performance in flow systems. This study focuses on determination of the volumetric flow rate and its standard (relative) deviation for calibration of conventional flow meters by using a radiotracer approach. The measurements for flow meter calibration were performed at a pilot-scale flow rig using Technetium-99 m (99mTc) as a radiotracer in the form of pertechnetate ion (99mTcO4-). The measured data were analyzed, and precision of the experimental setup was investigated under two different approaches – IAEA’s RTD software and sum approximation of raw data. For the first time, the variation of standard deviation of calculated flow rate with the injection volume and activity of the radiotracer was determined. Plug flow with axial dispersion was used to simulate the measured RTD curves and investigate the flow dynamics of the flowing water. The results of the study have shown the possibility of in situ calibration of flow meters with a relative error lower than 1 %. They also revealed a slight dependency of the precision of output results on the injection volume as well as similar results for manual and specialized RTD software data processing.U hemijskim procesima od suštinskog značaja je tačno definisan i precizan protok. Merenja brzine fluida su važna za karakterizaciju kvaliteta protoka tečnosti u sistemima. Ova studija se fokusira na određivanje zapreminskog protoka i standardnog (relativnog) odstupanja izmerenih vrednosti u cilju kalibracije konvencionalnih merača protoka korišćenjem metode radioaktivnog obeleživača. Merenja potrebna za kalibraciju merača protoka izvedena su na pilot postrojenju korišćenjem Tehnecijuma-99m (99mTc) kao radiotrejsera u obliku pertehnetatnog jona (99mTcO4-). Izmereni podaci su analizirani, a preciznost eksperimentalne postavke je ispitivana pomoću dva različita pristupa: upotrebom softvera za određivanje raspodele vremena zadržavanja (eng. residence time distribution, RTD) koga je razvila Međunarodna agencija za atomsku energiju i zbirne aproksimacije neobrađenih podataka. Po prvi put je utvrđena varijacija standardne devijacije izračunatog protoka u odnosu na zapreminu i u odnosu na aktivnost ubrizganog radioaktivnog obeleživača. Model protoka sa aksijalnom disperzijom je korišćen za simulaciju izmerenih RTD krivih i istraživanje dinamike protoka vode. Rezultati studije su pokazali mogućnost in situ kalibracije merača protoka sa relativnom greškom manjom od 1%. Takođe su pokazali malu zavisnost preciznosti izlaznih rezultata od količine ubrizganog obeleživača, kao i slične rezultate za manuelnu obradu i specijalizovanu obradu podataka upotrebom RTD softvera

Disease characteristics and causes of early and late death in a group of Croatian patients with systemic lupus erythematosus deceased over a 10-year period

Aim To assess the causes of early death (ED) and late death (LD) in patients with systemic lupus erythematosus (SLE) and determine the features of deceased SLE patients followed- up in a single Croatian tertiary hospital center, because little if any data on causes of death (CODs) in SLE patients are available for Croatia. Method We identified SLE patients regularly followed-up at the Division of Clinical Immunology and Rheumatology, University Hospital Center Zagreb, who died from 2002 to 2011. Death was ascertained by matching our institutional records with the Croatian National Death Database. Patients were grouped according to their disease duration to ED and LD and compared by demographic characteristics, classification criteria, organ damage, and CODs. Results We identified 90 patients (68 women), who died at the age of 58 ± 15 years. The most frequent COD category was cardiovascular diseases (40%), followed by infections (33%), active SLE (29%), and malignancies (17%). No significant difference was found between the frequencies of causes of ED and LD, except for stroke, which caused only LD≥10 years after the diagnosis. SLE was reported in death certificates of only 41 of 90 patients. Conclusion Although stroke occurred both in the early and late disease course, it was primarily associated with LD. Given the low proportion of SLE recorded in death certificates of deceased SLE patients, matching of institutional and vital statistics records may be required to assess the true impact of SLE on mortality

Dekompresija kao delotvorni primarni pristup radikularnoj cisti u maksilarnom sinusu

Introduction. Therapeutic approach to jaw cysts may depend on their dimensions and localization. Enucleation of cystic lesion is not always preferable in the first act, especially if large cysts are in close proximity to important anatomical structures. The aim of this paper was to present the outcome of the treatment protocol comprising preoperative decompression and subsequent enucleation of a large maxillary cyst. Case re-port. A 21-year-old male patient with large asymptomatic radicular cyst in the right maxillary sinus was presented to our clinic. Conebeam computed tomography (CBCT) showed a large cyst, which perforated the right anterior maxillary wall by 1.5 cm, and was in the intimate contact with the orbital floor. Surgical treatment of the cystic lesion comprised: preoperative decompression with biopsy in the first act and enucleation, performed under general anesthesia, 6 months after the observation period. Conclusion. Decompression with subsequent enucleation proved to be effective treatment of large radicular cyst in maxillary sinus with low-morbidity.Uvod. Terapijski pristup cistama vilice može zavisiti od njihovih dimenzija i lokalizacije. Enukleacija cistične lezije često nije pogodna u prvom aktu ako se velika cista nalazi u blizini važnih anatomskih struktura. Cilj ovog rada bio je da se prikaže ishod lečenja velike ciste u maksilarnom sinusu koji je podrazumevao preoperativnu dekompresiju i odloženu enukleaciju. Prikaz bolesnika. Prikazan je bolesnik, star 21 godinu, sa velikom, asimptomatskom, radikularnom cistom u maksilarnom sinusu. Radiografska dijagnostika pomoću cone-beam kompjuterizovane tomografije (CBCT), pokazala je prisustvo velike cistične lezije koja je probila prednji maksilarni zid (1,5 cm) i bila u bliskom kontaktu sa podom orbite. Hirurški tretman cistične lezije uključio je preoperativnu dekompresiju i biopsiju u prvom aktu i enukleaciju u opštoj anesteziji nakon 6 meseci. Zaključak. De-kompresija i odložena enukleacija pokazale su se efikasnim terapijskim pristupom kod lečenje velike radikularne ciste maksilarnog sinusa uz mali morbiditet

Provodni putevi kod elektroprovodnih kompozita sa biodegradabilnom polimernom matricom

The results of experimental studies of the properties of composite materials based on lignocellulosic (LC) and poly(methylmetacrylate) matrices filled with electrolytic copper powder are presented. Volume fractions of metal fillers in composite materials and tested samples were varied in the range of 0.5-29.8% (v/v). Characterization included examination of the influence of particle size and morphology on the conductivity and percolation threshold of the composites using SEM and AFM. Presence of three dimensional conductive pathways was confirmed

Influence of process parameters of simultaneous anodization/anaphoretic electrodeposition synthesis of hydroxyapatite/titanium oxide composite coatings on adhesion

In-situ synthesis of hydroxyapatite/titanium oxide (HAp/TiO2) coating on titanium was performed via anaphoretic deposition of hydroxyapatite (HAp) and simultaneous anodization of Ti to produce highly adherent and strengthened composite coating. The influence of electric potential, time, electrolyte concentration and pH value of the anodization process on titanium surface roughness and anodization of titanium was examined, as well as influence of same process parameters on adhesion strength and compactness of composite HAp/TiO2 coatings was investigated. Prior to novel in situ method of synthesis of hydroxyapatite/titanium oxide composite coatings by simultaneous anodization/anaphoretic electrodeposition described in this manuscript, optimization of anodization process of titanium was performed. Anodization was executed under different electric potentials and different distances of counter electrodes from working electrodes, but all anodization processes had constant quantity of electric charge. Characterization of titanium samples, prepared from grade 6 Ti, and having rectangular contact surfaces of 10×10×0.89 mm included SEM/EDS analyses, X-ray diffraction analyses, AFM surface topography, morphology and roughness analyses and linear measurements of roughness.A chemical precipitation method was used to prepare hydroxyapatite powder by the reaction of calcium oxide (obtained by calcination of CaCO3 for 5 h at 1000 °C in air) and phosphoric acid. A stoichiometric amount of the calcium oxide was stirred in distilled water and phosphoric acid was added drop wise to the suspension in order to obtain hydroxyapatite powder, Ca10(PO4)6(OH)2.Two types of HAp coatings were prepared, in order to compare the adhesion, morphology and consistency of the HAp and composite HAp/TiO2 on Ti, namely cathaphoretic and anaphoretic coatings, respectively [1,2]. The prepared coatings were characterized by field emission scanning electron microscopy, X-ray diffraction and electron dispersive spectroscopy. Adhesion was investigated by ASTM D 3359 – 97 Test method B. Uniform and adherent HAp/TiO2 composite coating on Ti was obtained. Since smaller size of HAp crystals within highly porous coating structures is of improved binding ability to various biomolecules, our coating is expected to be of excellent coverage and compactness. The obtained coating can be good candidate for bone implants due to improved adhesion

Influence of process parameters of simultaneous anodization/anaphoretic electrodeposition synthesis of hydroxyapatite/titanium oxide composite coatings on adhesion

In-situ synthesis of hydroxyapatite/titanium oxide (HAp/TiO2) coating on titanium was performed via anaphoretic deposition of hydroxyapatite (HAp) and simultaneous anodization of Ti to produce highly adherent and strengthened composite coating. The influence of electric potential, time, electrolyte concentration and pH value of the anodization process on titanium surface roughness and anodization of titanium was examined, as well as influence of same process parameters on adhesion strength and compactness of composite HAp/TiO2 coatings was investigated. Prior to novel in situ method of synthesis of hydroxyapatite/titanium oxide composite coatings by simultaneous anodization/anaphoretic electrodeposition described in this manuscript, optimization of anodization process of titanium was performed. Anodization was executed under different electric potentials and different distances of counter electrodes from working electrodes, but all anodization processes had constant quantity of electric charge. Characterization of titanium samples, prepared from grade 6 Ti, and having rectangular contact surfaces of 10×10×0.89 mm included SEM/EDS analyses, X-ray diffraction analyses, AFM surface topography, morphology and roughness analyses and linear measurements of roughness.A chemical precipitation method was used to prepare hydroxyapatite powder by the reaction of calcium oxide (obtained by calcination of CaCO3 for 5 h at 1000 °C in air) and phosphoric acid. A stoichiometric amount of the calcium oxide was stirred in distilled water and phosphoric acid was added drop wise to the suspension in order to obtain hydroxyapatite powder, Ca10(PO4)6(OH)2.Two types of HAp coatings were prepared, in order to compare the adhesion, morphology and consistency of the HAp and composite HAp/TiO2 on Ti, namely cathaphoretic and anaphoretic coatings, respectively [1,2]. The prepared coatings were characterized by field emission scanning electron microscopy, X-ray diffraction and electron dispersive spectroscopy. Adhesion was investigated by ASTM D 3359 – 97 Test method B. Uniform and adherent HAp/TiO2 composite coating on Ti was obtained. Since smaller size of HAp crystals within highly porous coating structures is of improved binding ability to various biomolecules, our coating is expected to be of excellent coverage and compactness. The obtained coating can be good candidate for bone implants due to improved adhesion