Zuchtung und optisches Verhalten von BiOC1-KristallenEs werden die Wachstumsbedingungen fur BiOC1-Kristalle aus der Dampfphase ermittelt und deren Absorption und Raman-Spektren gemessen.Conditions for crystal growth of BiOCl crystals from the vapour phase were found and the absorption and Raman spectren determined.
Several diseases as well as trauma can affect the composition and integrity of periodontal tissues loading eventually to the destruction of connective tissue matrix and cells, loss of attachment and resorption of alveolar bone often followed by tooth loss. Replacement of the missing tooth could then be provided by endosseous dental implants healing in a form of osseo -or fibrosseal integration to the alveolar bone. Aluminium oxide ceramics, a form, of endosseous implant, allows osseointegration type of healing and has demonstrated excellent biocompatibility. However, potential aluminium toxicity has been implicated in the pathogenesis of a number of clinical disorders and for this reason we examined the reproductive and mutagenic effect of aluminium trioxide ceramic implant in experimental mice. 720 female and 45 fertile male BALB-cAn NCR mice were included in the study. 3 experimental groups of fertile male mice (15 for each group) were treated with an intraperitoneal injection of aluminium trioxide (I g/kg of body weight, group I), with ethyl-methane-sulphonate as a positive control (200 mg/kg, group II) and with Tween-80 (10 ing/kg as negative control, Group III). Each of the labeled male mice fertilized previously uncoupled female mice during 8 weeks (a pair per week) to facilitate appropriate pre-and post-meiotic conditions of spermatogenesis to occur. Female mice were sacrificed with cervical dislocation at day 13 after fertilization. Immediately upon sacrifice the uterus was removed and the number of alive and healthy, or alive but mutated and/or dead embryos was computed to determine the dominant lethal of mutagenic effects. Animals treated with aluminium trioxide demonstrated similar effects on the reproductive and mutagenic capacity as the negative control, whereas the animals treated as positive controls exhibited significantly reduced reproductive and mutagenic capacity. Collectively, we concluded that aluminium trioxide has a very low rate of embryonal mortality and mutagenicity in mice. This finding is in general agreement with the biocompatibility of aluminium trioxide (Aldovit) as an implant material
Globalizacija svetske ekonomije, primena novih informacionih i komunikacionih tehnologija u poslovanju, opadanje uticaja tradicionalnih načina komuniciranja i pristupa potrošačima, kao i intenzivno korišćenje savremenih, on-line komunikacija samo su neki od trendova koji karakterišu trenutne uslove poslovanja i istovremeno ističu značaj zaštite privatnosti podataka. Pojava Interneta i stalni napredak i razvoj online poslovanja sa jedne strane, te izrazito jaka konkurencija i težnja ka profitu sa druge strane, u velikoj meri su doveli do ugrožavanja privatnosti potrošača. Veoma brzo i jednostavno prikupljanje, skladištenje, pristup, razmena i korišćenje velikog broja informacija dovodi do zabrinutosti potrošača pre svega zbog mogućnosti zloupotrebe njihovih ličnih podataka i ugrožavanja privatnosti. Preduzeća u trci za profitom zanemaruju zaštitu privatnosti potrošača i često je tretiraju samo kao zakonsku obavezu. Međutim, ukoliko privatnost integrišu u sve segmente svog poslovanja ostvariće višestuke prednosti kao što su sticanje poverenja potrošača, povećanje konkurentnosti, ostvarivanje dodatne vrednosti i kreiranje pozitivnog imidža. Cilj rada se odnosi na objašnjenje značaja kvalitetne zaštite privatnosti i sigurnosti podataka kao i ukazivanje na njen uticaj pri kreiranju konkurentskih prednosti i ostvarivanju stabilne tržišne pozicije. Svrha rada je isticanje mišljenja potrošača o tome kako gledaju na zahteve preduzeća o dostavljanju ličnih podataka, zatim o stepenu ugroženosti njihove privatnosti kao i načinima njene efikasne zaštite.
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