THE INFLUENCE OF SATURATION ON THE UNIAXIAL COMPRESSIVE STRENGTH OF LIMESTONE IN EXPLORATION AREA CRNOGLAV NEAR NEUM

Istražni prostor Crnoglav kod Neuma u Bosni i Hercegovini geološki je građen od sedimentnih stijena vapnenca. Intaktnom materijalu s tog područja u ovom radu istražen je utjecaj zasićenja vodom na fizikalno-mehanička svojstva: gustoću, jednoosnu tlačnu čvrstoću, modul deformabilnosti, indeks čvrstoće. Ispitivanja su obavljena prema preporuci Međunarodnog društva za mehaniku stijena i Hrvatskoj normi. Rezultati su pokazali različit utjecaj saturiranosti na vrijednosti pojedinih ispitivanja. U radu su izloženi omjeri koji omogućavaju proračunavanja fizikalno-mehaničkih značajki u saturiranom stanju na osnovu njihovih poznatih vrijednosti u suhom stanju.Exploration area Crnoglav, near Neum, Bosnia and Herzegovina, is composed of limestone sedimentary rock. Research of influence of saturation with water was made on intact material from this area on physical and mechanical properties of the rock: uniaxial compressive strength, module of deformation, point load strength index and Schmidt rebound hardness. Tests were conducted on recommendation of International Society for Rock Mechanics (ISRM Suggested methods) and Croatian Standards. Results showed different influence of saturation on values of respective test. Ratios that help with calculations of physical and mechanical properties of rock in their saturated state based on their known values in dry state are presented in this paper

Efficacy and safety of triamcinolone acetonide posterior subtenon injection in patients with diabetic maculopathy

Introduction: Diabetic maculopathy (DM) is the main cause of visual impairment of the working population. Optical coherence tomography and fluorescein angiography give us a precise insight into retinal changes. In recent years, pharmacological treatment of DM is increasing. Posterior subtenon application is accompanied by a smaller percentage of complications compared to intravitreal application. Aim: The aim is to assess the efficacy and safety of triamcinolone acetonide (TA) posterior subtenon injection in the treatment of DM, by measuring intraocular pressure (IOP), central macular thickness (CMT) and visual acuity, before and two months after. Material and methods: The retrospective study included 49 patients admitted during 2016, for posterior subtenon injection of TA in the DM treatment, at Daily Hospital, for the treatment of vascular diseases of the eye and the macula Department of Ophthalmology, Clinical Center of Serbia. Data were collected from medical records on gender, age, type of retinopathy and visual acuity, IOP and CMT, before and two months after intervention. Results: The average age of patients was 63 ± 9.5 years. Out of 49 patients tested, 30.61% were female and 69.39 % were male. The frequency of non-proliferative diabetic retinopathy (NPDR) in the study was 53.6%. There was a statistically significant difference in visual acuity and CMT, before and two months after the intervention, but there was no correlation between the improvement of visual acuity and CMT reduction. There was no statistically significant difference in IOP, before and two months after intervention. Conclusion: The most common type of diabetic retinopathy in this study was NPDR. After posterior subtenon application of TA, there was a significant increase in visual acuity and CMT reduction, but reduction of CMT is not connected with the increase of visual acuity. Posterior subtenon TA application is not accompanied by a significant increase in IOP, and it is an effective and relatively safe way of treating DM

THE INFLUENCE OF SATURATION ON THE UNIAXIAL COMPRESSIVE STRENGTH OF LIMESTONE IN EXPLORATION AREA CRNOGLAV NEAR NEUM

Istražni prostor Crnoglav kod Neuma u Bosni i Hercegovini geološki je građen od sedimentnih stijena vapnenca. Intaktnom materijalu s tog područja u ovom radu istražen je utjecaj zasićenja vodom na fizikalno-mehanička svojstva: gustoću, jednoosnu tlačnu čvrstoću, modul deformabilnosti, indeks čvrstoće. Ispitivanja su obavljena prema preporuci Međunarodnog društva za mehaniku stijena i Hrvatskoj normi. Rezultati su pokazali različit utjecaj saturiranosti na vrijednosti pojedinih ispitivanja. U radu su izloženi omjeri koji omogućavaju proračunavanja fizikalno-mehaničkih značajki u saturiranom stanju na osnovu njihovih poznatih vrijednosti u suhom stanju.Exploration area Crnoglav, near Neum, Bosnia and Herzegovina, is composed of limestone sedimentary rock. Research of influence of saturation with water was made on intact material from this area on physical and mechanical properties of the rock: uniaxial compressive strength, module of deformation, point load strength index and Schmidt rebound hardness. Tests were conducted on recommendation of International Society for Rock Mechanics (ISRM Suggested methods) and Croatian Standards. Results showed different influence of saturation on values of respective test. Ratios that help with calculations of physical and mechanical properties of rock in their saturated state based on their known values in dry state are presented in this paper