2008 Cilt 2 Sayı 5
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Item Open Access The check-list and chorology of the linum L. (linaceae) taxa in the flora of Turkey(Uludağ Üniversitesi, 2008) Yılmaz, Özer; Kaynak, Gönül; Uludağ Üniversitesi/Fen Edebiyat Fakültesi/Biyoloji Bölümü.A check-list of the genus Linum L. in the Flora of Turkey is presented with 51 taxa, of which 22 are endemic to Turkey. Taxonomical changes that have occurred since the recent publications are included. The chorology of taxa are given in dotted squares of the map of Turkey.Item Open Access Effects of plasma insulin, glucose and NEFA concentrations of feeding frequency during long term in lambs(Uludağ Üniversitesi, 2008) Udum, C. Duygu; Cetin, Meltem; Balcı, Faruk; Güneş, Nazmiye; Hecer, Canan; Uludağ Üniversitesi/Veteriner Fakültesi/Zootekni Bölümü.; Uludağ Üniversitesi/Karacabey Teknik Meslek Yüksekokulu/Gıda Teknolojisi Bölümü; Uludağ Üniversitesi/Veteriner Fakültesi/Biyokimya Bölümü.In ruminants, very little is known about the physiological background of the mechanisms involved in feed intake regulation. Mechanisms that control feed intake exist in ruminants but the exact nature of the control systems are not well understood. For this reason, the effects of different feeding regimens, and the initiation/termination of feeding on blood glucose, insulin, and NEFA were measured in lambs fed once, two times daily and fed ad libitum. To determine insulin hormone influence on feed intake, blood was sampled before 30 minutes of feeding (08:30) and after 1 hour of feeding (10:00) in the morning, and collected 14:00, before 30 minutes of feeding (15:30), after 1 hour feeding (17:00). In the different times fed lambs, plasma insulin levels had a significant change (P<0.05) between groups and between sampling times(P<0.05) but glucose and NEFA levels had no significant changes among groups. We have demonstrated for the first time that modification of feeding regimen could affect plasma insulin levels.Item Open Access Characterization of semi-extensive goat production systems in South Marmara region of Turkey(Uludağ Üniversitesi, 2008) Koyuncu, Mehmet; Uzun, Şebnem Kara; Tuncel, Erdoğan; Uludağ Üniversitesi/Ziraat Fakültesi/Zootekni Bölümü.This study attempts to describe the semi-extensive goat farming sector in south Marmara region of Turkey and to establish characteristics. Ninety-two goat farmers were surveyed in four provinces of this region. The aim of the study was to assess and document the prevailing goat production systems in the provinces. Information obtained was mainly on flock sizes, reasons for keeping, breeding and management practices. A structured questionnaire, based on interviews of 92 respondents revealed variability in response among flock sizes (116–220). Most of the goat farms studied is single-worker or family managed. Goat supply kids, milk and fiber, especially to farmers moving their animals through seasonal grazing. Farms specializing in milk production, whose main activity is dairy goat farming. Feeding depends largely on grazing, with little area being cultivated to produce feed for the goats. Goats in these systems have not been adequately studied, nor have they received the same attention as sheep. Goat production practices are essentially traditional and characterized by low productivity. Poor overall management, inadequate housing, malnutrition, improper use of grazing resources, inadequate health services, lack of organized marketing and lack of a national policy on small ruminant production, were identified as major constraints. However, recently more attention has been paid to goat production by producer and productivity is increasing. This work supposes previous steps for improving the semi-extensive goat farming sector. From a methodological point of view, the discussion on variable types and utility establishes farm type characteristics.Item Open Access Evaluation of clastogenicity of 4, 6-dinitro-o-cresol (DNOC) in allium root tip test(Uludağ Üniversitesi, 2008) Aydemir, Nilüfer; Çelikler, Serap; Summak, Şenay; Yılmaz, Dilek; Özer, Özlem; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji Bölümü.4, 6-Dinitro-o-cresol (DNOC) is a pesticide, fungicide and insecticide, used in agriculture. In this research the genotoxic effect of DNOC on the root tips of Allium cepa L. was determined. The correlations between the effects of different concentrations, exposure times on the mitotic index (MI) and induction of chromosomal aberrations (CA) were also examined. Experiments were carried out in duplicate, using aqueous solutions of DNOC to concentrations of 250 and 500 ppm, at intervals of 0, 3, 6, 12, and 24 h. The results revealed an inhibition of the MI at the highest concentration and experiment times; this is an evidence of cytotoxicity of DNOC. Large number of c-mitosis indicated that DNOC acts as a strong spindle inhibitor, whereas, other CA types such as, breaks, bridges etc. were found in all tested concentration and times (p < 0.001) showing that is a potent clastogen.Item Open Access In vitro activity of chloroquine phosphate on the antibacterial potency of ciprofloxacin hydrochloride on the clinical İsolates of some gram-negative microorganisms(Uludağ Üniversitesi, 2008) Adegbolagun, Olayemi M.; Olajuyigbe, Olufunmiso O.; Kazzim, Oladapo J.; Osho, OlufemiThe in vitro activity of chloroquine on the antibacterial effect of ciprotloxacin on some Gram-negative organisms was investigated using the in vitro standardized method of the National Committee for Clinical Laboratory Standard (NCCLS). The study showed that three of the four strains of Pseudomonas aeruginosa (PA1, PA4, and PA4) and the strain of Klebsiella pncumoniae (KP) isolates were sensitive to ciprotloxacin hydrochloride alone as well as in combination with chlorOCJUine phosphate. However a strain of Pseudomonas aeruginosa (PA3) was sensitive to ciprotloxacin hydrochloride alone, but the sensitivity to ciprofloxacin hydrochloride was lost in the presence of chloroquine even at the lowest concentration of 1pg/ml. The two strains of Escherichia coli used were not sensitive to ciprotloxacin alone and in combination with chloroquine. There were no significant pharmacodynamic interaction between chloroquine and ciprofloxacin on the PA1, PA4, and KP strains used in vitro (p>0.05). On the other hand, a significant enhancement of in vitro antibacterial activities of ciprolloxacin by chloroquine on the strain PA2 at the various concentrations was observed (p<0.05). The inhibition, enhancement or lack of effect of chloroquine phosphate on the ciprotloxacin hydrochloride observed in this study depends on the type and strain of microorganism involved.