Comparison of two hematocrite measurement methods in diarrheic neonatal calves

Bu çalışmada veteriner hekimlikte sıklıkla kullanılan hücre sayımı temel prensipli ve amperometrik yöntem ile ölçüm yapan iki farklı hematokrit ölçüm tekniğinin karşılaştırılması amaçlandı. Farklı etiyolojileri bulunan her iki cinsiyetten toplam 84 neonatal ishalli buzağı çalışmaya dahil edildi. Hematokrit ölçümleri için buzağılardan lityum heparin içeren kan gazı enjektörlerine ve tüplere kan örnekleri, toplamda 4 ml olacak şekilde alındı. Hematokrit ölçümleri için Abacus Junior Vet 5 kan sayım cihazı ve Irma Truepoint kan gazı analiz cihazından yararlanıldı. Linear regresyon analizi ve pearson korelasyonu sonuçlarına göre hematokrit ölçümlerinden elde edilen verilerin her iki ölçüm tekniği arasında r=0.90 (p<0.000) düzeyinde pozitif yönde korelasyona sahip olduğu, ancak iki test tekniğinin ortalama değerleri arasında istatistiksel yönden farklılıkların bulunduğu belirlendi. Passing-bablok regresyon analizinde ise y= 0.88x+1.81 denklemi elde edildi. Çalışma sonuçlarına göre, klinikte yoğun şekilde yapılan hematokrit ölçümlerinin değerlendirilmesinde her iki ölçüm tekniğinden yararlanılabileceği ancak iki ölçüm metodu arasında farklılıkların bulunmasına bağlı olarak hasta hayvanlarda şüpheye düşüldüğü durumlarda klasik santrifüj yöntemine dayalı mikrohematokrit ölçümlerinin yapılması gerektiği sonucuna varıldı.In this study, it was aimed to compare two different hematocrit measurement techniques which are commonly used in veterinary medicine by cell count, and amperometric method. A total of 84 neonatal diarrheic calves from both sexes with different etiologies were included in the study. For hematocrit measurements, blood samples (4 ml) were taken to blood gas injectors and tubes containing lithium heparin from calves. The Abacus Junior Vet 5 whole blood cell counter and Irma True Point blood gas analyzer were used for hematocrit measurements. According to the results of linear regression analysis and Pearson correlation, it was determined that the data obtained from the hematocrit measurements had positive correlations between r = 0.90 (p <0.000) between the two measurement techniques, but statistically significant differences were found between the mean values of the two test techniques. In Passing-bablok analysis y= 0.88x+1.81 equation was found. According to the results, both measurements can be utilized in assessing hematocrit measurement, but in case of the difference between the two measuring methods, it was concluded that suspected cases should be made based on the conventional measurement microhematocrit centrifugation

Conversion of racemic allylic hydroperoxides into corresponding chiral 1/2,3-triols by using catalytic OsO4 and chiral cinchona ligands in the absence of co-oxidant

WOS: 000359063900010For the first time, removal of oxygen atoms from allylic hydroperoxide functionality and reintroduction to the double bond was achieved using catalytic OsO4 and chiral cinchona alkaloid derivatives in an acetone water mixture to give corresponding chiral 1/2,3-triol with an enantioselectivity up to 99% ee. The hydroperoxide group was used as both a co-oxidant and a source of hydroxyl groups. This protocol is thought to have potential to provide opportunities for chiral synthesis of 1/2,3-triols from corresponding allylic hydroperoxides in the absence of co-oxidant in one stage for the first time in the literature.Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [109T815]This study was supported partially by the Scientific and Technological Research Council of Turkey (TUBITAK) (Project No: 109T815)

Oxidation reaction of 4-allyl-4-hydroperoxy-2-methoxycyclohexa-2,5-dienone in the presence of potassium permanganate without a co-oxidant

4-Allyl-4-hydroperoxy-2-methoxycyclohexa-2,5-dienone (5) was synthesized by photooxygenation of commercially available Eugenol in the presence of tetraphenylporphyrin (TPP) as a singlet oxygen sensitizer. The brief and one-pot syntheses of some natural product skeletons were conducted using the °C and room temperature) with potassium permanganate (KMnO4) in mild condition at N2(g) atm. © 2016 ACG Publications

A facile synthesis of vicinal cis-diols from olefins catalyzed by in situ generated MnxOy nanoaggregates

WOS: 000350221600019A novel protocol for the practical and green synthesis of vicinal cis-diols from 10.0 mmol olefins by using 5.0 mmol KMnO4 as oxidant and 30.0 mmol H2O2 as co-oxidant is reported. The presented procedure is easy to carry out and enables the direct transformation of linear and cyclic alkenes to the corresponding vicinal cis-diols. The synthesis of vicinal cis-diols by dihydroxylation of olefins with a KMnO4/H2O2 system was catalyzed by in situ generatedMnxOy nanoaggregates. The use of H2O2 as a co-oxidant is the key for the protocol to synthesize vicinal cis-diols in high yields, because it assists the oxidation of MnxOy nanoaggregates, which have an active role in the oxidation reaction medium.Ataturk UniversityAtaturk University [2013/82]We thank Assoc. Prof. Dr Onder Metin for his help with the TEM, SEM, XRD, XPS, EDX, BET and BJT studies and proofreading. This work was supported by the Ataturk University under project no. 2013/82

The effects of applied load on the coefficient of friction in Cu-MMC brake pad/Al-SiCp MMC brake disc system

In this study the frictional and wear characteristics of sintered copper matrix composite brake pads against cast Al-Si/SiCp brake disc and the effects of applied load on the coefficient of friction have been reported Tribological behavior of Cu-MMC/Al-MMC couple was studied using Pin-on-Disc tribometer The aluminum metal matrix composite material was used as a disc whereas the graphite reinforced copper matrix composite was used as a brake pad Frictional surfaces were investigated using a scanning electron microscope (SEM) equipped with energy-dispersive spectroscopy (EDS) The amount of wear of both brake disc and pad cannot be measured since trace amount of material was transferred These phenomena also proved that the brake disc and the pad have high wear resistance The friction layer on the brake pad s worn surface was confirmed as mostly of carbon and copper oxides (C) 2010 Elsevier B V All rights reserve