Zaprojektowanie i opracowanie tkanin dżinsowych o zwiększonej wytrzymałości i odporności na ścieranie podczas uderzenia z przeznaczeniem na odzież dla motocyklistów

This study aims to design and develop denim fabrics with enhanced mechanical and impact abrasion resistance performance using different materials, yarn types and fabric constructions. It was aimed to reach the standard impact abrasion resistance requirements of motorcycle protective clothing for Level 1 in high impact areas of the body (zones 1 and 2), such as hip and knee areas. The existence of cotton/Cordura® yarn in warp and T400 polyester yarn in the weft and the use of higher yarn densities increased the performance in tensile strength and impact abrasion resistance, compared to a classical cotton denim fabric. The use of coarser yarns and fabrics with a double weave construction increased impact abrasion resistance compared to single layer cloths. The double and backed cloth samples developed with cotton/Cordura® and Kevlar®/polyester yarns in their construction showed impact abrasion resistance times over 4 s and reached the “EN 13595-2:2002 Level 1 abrasion resistance” standard requirement.Celem pracy było zaprojektowanie i opracowanie tkanin dżinsowych o zwiększonej wytrzymałości i odporności na ścieranie podczas uderzenia z przeznaczeniem na odzież dla motocyklistów. W tym celu użyto kilku rodzajów przędzy i konstrukcji z tkaniny. Celem było osiągnięcie standardowych wymagań odporności na ścieranie odzieży ochronnej motocyklistów na poziomie 1 w obszarach szczególnie narażonych na urazy takich jak biodra i kolana (strefy 1 i 2). Zastosowanie przędzy o wyższej gęstości zwiększyło wytrzymałość na rozciąganie i odporność na ścieranie w porównaniu do klasycznej tkaniny bawełnianej. Zastosowanie grubszych przędz i tkanin o podwójnej strukturze splotu zwiększyło odporność na ścieranie w porównaniu do wyrobów jednowarstwowych. Podwójne i wzmocnione próbki tkanin dzięki swojej konstrukcji wykazywały odporność na ścieranie podczas uderzenia przez czas dłuższy niż 4 s i osiągnęły wymaganie normy EN 13595-2: 2002

Medicolegal aspects of blood-urine toluene and urinary ortho-cresol concentrations in toluene exposure

Toluene is a widely used solvent in different industrial areas and has a depressant effect on the central nervous system. In medicolegal cases, for the possible influence of toluene on actions or conditions prior to death, a reliable indicator of exposure must be precisely investigated. We developed an appropriate method for toluene analysis and investigate the blood-urine toluene levels and urinary ortho-cresol levels in toluene-exposed workers. Blood and urine toluene levels from 50 male subjects were detected by Gas Chromatography-FID (GC-FID) using the head-space method, and urinary o-cresol levels, a metabolite of toluene, were analyzed by GC. The significance of difference of ocresol/creatinine levels was evaluated by the nonparametric statistics Kruskal-Wallis One Way Anova, and correlation and regression statistics were determined by Pearson Correlation of bivariant analysis. The toluene concentrations in blood ranged from 0.07 to 2.12 mg/g. Urinary o-cresol levels were not correlated significantly with blood or urine toluene levels. There was no significant difference for ortho-cresol/creatinine levels between the control and worker groups. It is concluded that for medicolegal purposes, urine toluene and urinary o-cresol levels are not reliable markers, and direct toluene analysis in blood must be preferrred in toluene exposure

The role of neutrophil gelatinase-associated lipocalin (NGAL) in the determination of contrast-induced nephropathy in patients undergoing coronary angiography

OBJECTIVE: Contrast-induced nephropathy (CIN) is the acute kidney injury developing following the administration of contrast agent after all other reasons are excluded. We aimed to determine the role of NGAL in the urine for early diagnosis of contrast-induced nephropathy, as the disorder is an important reason of acute renal failure in cases subject to cardiac catheterization clinical practice, and the frequency is increasing.MATERIAL and METHODS: One hundred cases undergoing elective coronary angiography between the dates of January 1st 2011 and March 1st 2011 were included in the study. Urine samples of the patients were taken maximum 4 hours after the coronary angiography to check the urinary NGAL level.RESULTS: The creatinine level had increased 25% in 8 patients at the 48th hour following angiography and this was accepted as CIN. Using a cutoff value of 100 ng/ml, urinary NGAL levels were found to elevated in these 8 patients, consisting of 6 females and 2 males. All them had hypertension (HT) by itself or with other accompanying diseases.CONCLUSION: The CIN diagnosis can be made with the conventional method of measuring the level of creatinine in the blood 48 hours after surgery but using the urinary NGAL method can fasten the diagnosis and treatment and also can shorten hospital stays

Modified myocardial performance index is not affected in fetuses with an isolated echogenic focus in the left ventricle

Objectives: We prospectively investigated the efficacy of modified myocardial performance index (mod-MPI) in the assessment of cardiac functions in fetuses with and without an isolated hyperechogenic focus (IHF) in the left ventricle and compared with conventional fetal echocardiography