66 research outputs found

    Investigations of sample affect to scale findings in social researches

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    Tarama modeline g├Âre y├╝r├╝t├╝len bu ara┼čt─▒rmada sosyal bilimlerde s─▒kl─▒kla kullan─▒lan ├Âl├žek bulgular─▒na ├Ârneklemin etkisi ara┼čt─▒r─▒lm─▒┼čt─▒r. Bu ama├žla farkl─▒ ara┼čt─▒rmac─▒lar taraf─▒ndan geli┼čtirilmi┼č ├╝├ž ayr─▒ ├Âl├žek y├╝ksek├Â─čretim kurumlar─▒ndan mezun 226 ki┼čiye uygulanarak bulgular kar┼č─▒la┼čt─▒r─▒lm─▒┼čt─▒r. Yap─▒lan analizlerde ├Âl├žekler aras─▒ korelasyon de─čerlerinin y├╝ksek, Cronbach Alpha g├╝venirlik katsay─▒lar─▒n─▒n kabul edilebilir s─▒n─▒rlar i├žinde oldu─ču tespit edilmi┼čtir. Buna kars─▒n cinsiyet ve mezun olunan y├╝ksek├Â─čretim kurumu a├ž─▒s─▒ndan yap─▒lan kar┼č─▒la┼čt─▒rmalarda birbirinden olduk├ža farkl─▒ sonu├žlara ula┼č─▒lm─▒┼čt─▒r. Bu bulgulara ├Ârneklemin etkisinin olup olmad─▒─č─▒ ara┼čt─▒r─▒lm─▒┼č, ├Âl├žek bulgular─▒n─▒n ├Ârneklemden etkilendi─či y├Ân├╝nde g├╝├žl├╝ kan─▒tlara ula┼č─▒lamam─▒┼čt─▒r. Buna kars─▒n tutum gibi zaman i├žinde de─či┼čebilen ├Âzelliklerin ├Âl├ž├╝lmesinde kullan─▒lacak ara├žlar─▒n veri toplama s├╝recinden ├Ânce yeniden g├Âzden ge├žirilmesi gerekti─či g├Âr├╝lm├╝┼čt├╝r. Ara┼čt─▒rma bulgular─▒na dayal─▒ olarak ara┼čt─▒rmac─▒lara ├Âl├žek geli┼čtirme ├žal─▒┼čmalar─▒nda sadece a├ž─▒mlay─▒c─▒ fakt├Âr analizi ile yetinmeyip do─črulay─▒c─▒ fakt├Âr analizini de yapmalar─▒ ├Ânerilmektedir

    Electrokinetic properties of kaolins belong to Eski┼čehir-Mihal─▒├žc─▒k

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    Bu ├žal─▒┼čmada, Eski┼čehir-Mihal─▒├žc─▒k il├žesi Ah─▒r├Âz├╝ ve ├ť├žba┼čl─▒ k├Âylerindeki kil yataklar─▒ndan temin edilen kaolen numuneleri karakterize edilerek, su i├žerisinde elektrokinetik ├Âzellikleri incelenmi┼čtir. Bu kapsamda, her iki kaolen numunesinin de pHÔÇÖya, tek, ├žift ve ├╝├ž de─čerlikli elektrolit t├╝r├╝ne ve bu elektrolitlerin konsantrasyonuna ba─čl─▒ olarak zeta potansiyel (ZP) ├Âl├ž├╝mleri ger├žekle┼čtirilmi┼čtir. Ah─▒r├Âz├╝ kaoleninin s─▒f─▒r y├╝k noktas─▒ ~pH 4,2 iken, ├ť├žba┼čl─▒ kaoleninin s─▒f─▒r y├╝k noktas─▒ ~pH 3,2 olarak belirlenmi┼čtir. ├çal─▒┼č─▒lan 2-11 pH aral─▒─č─▒nda ├ť├žba┼čl─▒ kaoleninin, Ah─▒r├Âz├╝ kaolenine g├Âre daha negatif y├╝ke sahip oldu─ču belirlenmi┼čtir. Bu farkl─▒l─▒k kaolen numunelerinin mineralojik ve kimyasal bak─▒mdan farkl─▒l─▒─č─▒ndan kaynaklanmaktad─▒r. Ancak her iki y├Ârenin kaoleni de, farkl─▒ elektrolitler varl─▒─č─▒nda benzer y├╝k davran─▒┼č─▒ sergilemi┼čtir. NaCl ve KCl gibi tek de─čerlikli elektrolitler kaolenlerin zeta potansiyelini negatif y├Ânde art─▒r─▒rken, bunun aksine iki (CaCl 2 ve MgCl 2 ) ve ├╝├ž (Al(NO 3 ) ) de─čerlikli elektrolitler zeta potansiyeli (mutlak de─čer olarak) azaltm─▒┼čt─▒r. Kaolenlerin y├╝zey i┼čaretinin negatiften pozitife d├Ân├╝┼čebilmesi ise ancak Al(NO 3 ) 3 varl─▒─č─▒nda Al +3 3 gibi +3 de─čerlikli katyonlar─▒n kaolen tabaka kenar y├╝zeylerine spesifik adsorplanmas─▒yla m├╝mk├╝n olabilmi┼čtir.In this study, two kaolin samples collected from clay deposits in the villages Ah─▒r├Âz├╝ and ├ť├žba┼čl─▒ of Mihal─▒├žc─▒k (Eski┼čehir) have been characterized and their electrokinetic properties in water were investigated. In this scope, zeta potential measurements have been performed to determine the effect of pH, mono-, di- and trivalent electrolyte type and concentrations of these electrolytes on the zeta potential of the two kaolin samples. Isoelectric point of Ah─▒r├Âz├╝ kaolin was determined as ~pH 4.2, while that of ├ť├žba┼čl─▒ kaolin was determined as ~pH 3.2. ├ť├žba┼čl─▒ kaolin has a more negatively charged surface than Ah─▒r├Âz├╝ kaolin in the pH range of 2-11. This difference probably results from the differences in their mineralogical and chemical contents. However, both of the two kaolin samples showed the similar surface charge behavior against mono-, di- and trivalent electrolytes. Monovalent electrolytes such as NaCl and KCl make the ZP of the kaolins more negative, whereas divalent (CaCl2 and MgCl2) and trivalent (Al(NO3)3 ) electrolytes decreases the ZP as its absolute value. Change in the surface sign of the kaolins from negative to the positive is only possible in the presence of trivalent electrolytes (Al-nitrate) due to specific adsorption of Al3+ cations on the edge surface of the kaolin layers.Anadolu ├ťniversitesi Bilimsel Ara┼čt─▒rma Projeleri Komisyonu / 04106

    Frequency of angiotensin II type 1 receptor gene polymorphism in Turkish acute stroke patients

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    This study was performed in acute stroke patients in the Turkish population to determine the frequency of the A1166C polymorphism in the AT1 gene and to examine the role of this polymorphism in acute stroke development. In this study, 257 genomic DNA samples were analysed (from 206 acute stroke patients and 51 healthy individuals). Genomic DNA was prepared from peripheral blood using the salt-extraction method. The presence of the A1166C polymorphism in the AT1 gene was determined using the polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) method. PCR products were separated by 2% agarose gel electrophoresis and visualized by a charge-coupled device (CCD) camera. In this study, the allele frequency at the A1166C position was 92% A and 8% C for control and 97% A and 3% C for patients. This difference in allele frequency between the control group and the patient group was not statistically significant. However, genotype and allele frequencies showed a significant difference (P<0.001) in the control and the patient groups. The results of this study show no relationship between the A1166C polymorphism in the AT1 gene and acute stroke in the Turkish population

    Prevalence, associated factors and outcomes of pressure injuries in adult intensive care unit patients: the DecubICUs study

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    Funder: European Society of Intensive Care Medicine; doi: http://dx.doi.org/10.13039/501100013347Funder: Flemish Society for Critical Care NursesAbstract: Purpose: Intensive care unit (ICU) patients are particularly susceptible to developing pressure injuries. Epidemiologic data is however unavailable. We aimed to provide an international picture of the extent of pressure injuries and factors associated with ICU-acquired pressure injuries in adult ICU patients. Methods: International 1-day point-prevalence study; follow-up for outcome assessment until hospital discharge (maximum 12 weeks). Factors associated with ICU-acquired pressure injury and hospital mortality were assessed by generalised linear mixed-effects regression analysis. Results: Data from 13,254 patients in 1117 ICUs (90 countries) revealed 6747 pressure injuries; 3997 (59.2%) were ICU-acquired. Overall prevalence was 26.6% (95% confidence interval [CI] 25.9ÔÇô27.3). ICU-acquired prevalence was 16.2% (95% CI 15.6ÔÇô16.8). Sacrum (37%) and heels (19.5%) were most affected. Factors independently associated with ICU-acquired pressure injuries were older age, male sex, being underweight, emergency surgery, higher Simplified Acute Physiology Score II, Braden score 3 days, comorbidities (chronic obstructive pulmonary disease, immunodeficiency), organ support (renal replacement, mechanical ventilation on ICU admission), and being in a low or lower-middle income-economy. Gradually increasing associations with mortality were identified for increasing severity of pressure injury: stage I (odds ratio [OR] 1.5; 95% CI 1.2ÔÇô1.8), stage II (OR 1.6; 95% CI 1.4ÔÇô1.9), and stage III or worse (OR 2.8; 95% CI 2.3ÔÇô3.3). Conclusion: Pressure injuries are common in adult ICU patients. ICU-acquired pressure injuries are associated with mainly intrinsic factors and mortality. Optimal care standards, increased awareness, appropriate resource allocation, and further research into optimal prevention are pivotal to tackle this important patient safety threat