Investigation of Effect of Roller Setting on Yarn Quality Properties in Draw Frame
In the scope of the study, it was aimed to determine the effect of the variation of the roller setting on the selected yarn properties in the first and second passage draw frame stages. For this purpose, two different draft distances were chosen for both passages and draw frame strip was produced. Then, these strips were made into yarn with constant production parameters. The hairiness, unevenness and strength properties of the yarns were tested with standard method. As a result, it was observed that increasing the draft distance affects negatively the selected three yarn properties. In this case, it has been determined that the shorter draft distance has more positive results in terms of yarn quality parameters for Şanlıurfa GAP cotton selected as the sample in the study.
Farklı İplik Tüylülüğü Test Cihazlarından Elde Edilen Sonuçların Karşılaştırılması
Bu calismada, esas olarak olcum sistemleri birbirinin benzeri olan Uster Tester 3, Uster Tester 4 ve Premier Pt 7000 cihazindan alinan tuyluluk test sonuclari ayri ayri karsilastirilarak, ayni iplik numunesine ait farkli cihaz sonuclari arasinda istatistiksel acidan anlamli fark olup olmadigi arastirilmistir. Calismada ozellikle UT4 ile Pt 7000'den alinan sonuclar arasinda fark olup olmadigi arastirilmistir. Ayrica ring ve OE-rotor ipliklerinin tuylulukleri, iplik isletmelerinde iplik tuylulugu testinde yaygin olarak kullanilan UT3, UT4, Pt 7000 ve Zweigle G 566 cihazlarinda test edilerek, soz konusu farkli test cihazlarindan elde edilen tuyluluk degerlerinin iplik numarasina bagli olarak degisim egilimi degerlendirilmistir. Elde edilen sonuclar degerlendirildiginde, ring ipliklerin UT4 ve Pt7000 test cihazlarindan alinan tuyluluk sonuclarinda ince ipliklerde (Ne 50-60) onemli fark olmamasina ragmen, orta incelikteki ipliklerde (Ne 20-30) tuyluluk degerinin Pt7000 cihazinda daha yuksek olarak olculdugu ve aradaki farkin istatistiksel acidan anlamli oldugu tespit edilmistir. OE-rotor ipliklerde ise Ne 12 numara iplige ait sonuclar haric incelenen UT4 ve Pt7000 tuyluluk sonuclari arasinda onemli bir fark gorulmemistir. Farkli cihazlardan alinan iplik tuylulugu sonuclarina ait egilimler degerlendirildiginde ise, penye triko, penye dokuma ve OE-rotor iplikleri icin dort cihazdan alinan sonuclarin beklenildigi gibi iplik inceldikce azalma egilimi gosterdigi, buna karsin penye dokuma iplikleri icin Zweigle G 566 cihazindan alinan sonuclarin tam tersi bir egilim gosterdigi belirlenmistir.
Enumeration of total coliforms, fecal coliforms, and Escherichia coli in foods by hydrophobic grid membrane filter: supplementary report.
Raw, comminuted poultry meat was used to determine the specificity of the media and incubation conditions used in the hydrophobic grid membrane filter method. Confirmation rates for target colonies were 100% for total coliforms, 98% for fecal coliforms, and 97-99% for Escherichia coli. The results of total coliform enumeration in 30 pasteurized milk samples by both the hydrophobic grid membrane filter method and AOAC method 46.013-46.016 are also reported.