2007 Cilt 1 Sayı 2
Permanent URI for this collection
Browse
Recent Submissions
Item Open Access Developing environmental sensitivity for children scale: reliability and validity studies(Uludağ Üniversitesi, 2007) Başal, Handan Asude; Doğan, Yadigar; Atasoy, Emin; Uludağ Üniversitesi/Eğitim Fakültesi/İlköğretim Bölümü.This study a This study aims to develop an Environmental Sensitivity Scale for pupils aged between 9-15 who attend primary School. In an attempt to develop questionnaire items, the relevant literature has been reviewed, and the studies of the researchers of Environmental Science and Education have been investigated. In order to ensure the reliability of 90-item-Likert scale which has been administered to an experimental group consisting of 4th and 5th grade students in primary school twice with one-week intervals through the method of Scale Test-Retest. Both subject scoresobtained from the two different administrations of environmental sensitivity scale were tested by means of Pearson-moment correlation technique and a correlation coefficient of .72 has been found. In addition, students’ enviromental sensitivity was measured by both Children’s Environmental Attitude and Knowledge Scale which was developed by Leeming and Dwyer (1995) and the Environmental Sensitivity Scale for Children. The data were analysed by Pearson-moment correlation technique with a correlation coefficient of .64. These two findings indicate that the reliability and validity coefficients of the scale developed by the researcher are quite high.Item Open Access Efficiency of polyvalant mastitis vaccine in lactating dairy cows(Uludağ Üniversitesi, 2007) Tek, Hasan Basri; Keskin, Abdülkadir; İntaş, Kamil Seyrek; Tuna, Bilginer; Yılmazbaş, Gülnaz; Özakın, Cüneyt; Ertaş, Sacit; Uludağ Üniversitesi/Veteriner Fakültesi.; Uludağ Üniversitesi/Tıp Fakültesi/Mikrobiyoloji ve Enfeksiyon Hastalıkları Anabilim Dalı.; Uludağ Üniversitesi/İktisat Fakültesi/Yönetim Ekonometri Bölümü.The aim of the study was to investigate the efficacy of a polyvalent mastitis vaccine under field conditions. Dairy cows (n=218) that had not been previously received a mastitis vaccine were separated into two treatment groups; vaccine (n=111) and control (n=107) in four different dairy farms. Initially, individual Somatic Cell Count (SCC), California Mastitis Tests (CMT) scores and clinical mastitis (CM) cases were detected. Two doses of the vaccine, 4 weeks apart, were administered in vaccine group by intramuscular injection. Cows in control group were received physiological saline. After the treatments, animals were examined monthly for SCC, CMT and CM during six months. In addition, milk samples were also taken from udder quarters of the cows with CMT +3 scores and CM for bacteriological examination. SCC of vaccine group was lower (P<0.056) than the control at the end of the study. CM rates were not significant in the vaccine (26.1%) and control (18.7%) groups. Staphylococcus aureus (S. aureus) isolations from milk samples of udder quarters with CMT (+3) scores were not different in the vaccine (25.8%) and control (34.8%) groups. Streptecoccus uberis (S. uberis), Coagulase Negative Staphylococcus (CNS) and Streptecoccus spp. intamammary infection (IMI) isolation rates was not different between groups. Thus, polyvalent mastitis vaccine did not have enough protective effect against mastitis, nevertheless CM that occured in vaccine group seemed to have fewer inflamation degrees.Item Open Access A study on araneo-fauna (arachnida: araneae) of Görükle campus area (Bursa)(Uludağ Üniversitesi, 2007) Kaya, Rahşen S.; Uğurtaş, İsmail Hakkı; Uludağ Üniversitesi/Fen Edebiyat Fakültesi/Biyoloji Bölümü.In this research, spider specimens collected from Görükle Campus area between 2000 and 2001. A total of 687 adults were collected, and 69 spider species belong to 52 genera in 23 families were recorded.Item Open Access Allergenic fungal spore concentrations in the atmosphere of Bursa, Turkey(Uludağ Üniversitesi, 2007) Ataygül, Elif; Celenk, Sevcan; Canıtez, Yakup; Bıcakcı, Adem; Malyer, Hulusi; Sapan, Nihat; Uludağ Üniversitesi/Fen- Edebiyat Fakültesi/Biyoloji Bölümü.; Uludağ Üniversitesi/Tıp Fakültesi/Çocuk Alerji Bilim Dalı.The daily distribution of allergic fungal spores for Bursa during 1999 was established using a 7-day volumetric Lanzoni trap. Ten of the important allergic fungal spores (Cladosporium sp., Alternaria sp., Aspergillus sp. / Penicillum sp., Fusarium sp., Epicoccum sp., Drechslera sp., Pithomyces sp., Stemphylium sp., Chaetomium sp. and Curvularia sp.) were identified. The dominant spore types detected were Cladosporium 88.11%, Alternaria 4.99%, Aspergillus / Penicillum 4.65%., Fusarium 0.84%, Epicoccum 0.62%, Drechslera 0.24%, Pithomyces 0.15%, Stemphylium 0.14%, Chaetomium 0.13% and Curvularia 0.13%. Spore levels of Cladosporium, Alternaria and Aspergillus / Penicillum peaked throughout the year. Fusarium April- June, Epicoccum June-August, Dreschlera July, September, Pithomycetes March, June and August, Stemphylium June-July, Chatemium May, July, Curvularia peaked July. In conclusion, a range of allergenic fungal spores were present in the air of Bursa throughout the year.Item Open Access A review on entomopathogenic nematodes in Turkey(Uludağ Üniversitesi, 2007) Susurluk, İ. Alper; Uludağ Üniversitesi/Ziraat Fakültesi/Bitki Koruma Bölümü.Entomopathogenic nematodes (EPNs) are considered as potential biological control agents against soil-borne insect pests in the world. There are also some studies on EPNs in Turkey. The purpose of this review is to clarify the current situation of EPNs in Turkey. Initial study on EPNs has started in 1995 in Turkey and several survey studies have been performed primarily on the extraction and identification of EPNs. Five steinernematid and two heterorhabditid species have been identified to date from Turkey. There have been also studies examining the activity of EPNs against several insect. Furthermore, ecological studies including host finding behaviour and reproductive potential of EPNs are also performed. In conclusion, the potential of EPNs in biological control should be evaluated, and policies of government on EPNs should be also regulated in agricultural strategies.Item Open Access Effect of salinity, temperature, pH and crude oil concentration on biodegradation of crude oil by pseudomonas aeruginosa(Uludağ Üniversitesi, 2007) Thavasi, Rengathavasi; Jayalakshmi, Singaram; Balasubramanian, Thangavel; Banat, İbrahim M.The present study was carried out to evaluate the effect of culture conditions on biodegradation of crude oil by Pseudomonas aeruginosa. P. aeruginosa was isolated from sea water using Bushnell Haas agar supplemented with 0.1% crude oil. The strain was cultured at different temperature, pH a salinity and crude oil concentrations. Maximum growth and biodegradation occurred at 38oC, pH 8.0, 35‰ and 2.0% of crude oil. Addition of fertilizer at 0.1% concentration resulted increase in growth and biodegradation rate. Emulsification experiment revealed that P. aeruginosa showed good emulsification activity against waste motor lubricant oil, crude oil, peanut oil, diesel, kerosene, naphthalene, anthracene and xylene. Results obtained from the biodegradation experiments at different culture condition revealed that, each factor is having significant impact on biodegradation. Biodegradation of crude oil and emulsification of eight different hydrocarbons by P. aeruginosa indicated the potentiality of the strain.Item Open Access Sizing agents recovery by ultrafiltration: effects of operating conditions(Uludağ Üniversitesi, 2007) Kayar, Hacer Mirzalı; Aniş, Pervin; Eren, Hüseyin Aksel; Uludağ Üniversitesi/Tekstil Mühendisliği Bölümü.The recycling of polyvinyl alcohol, polyacrylate and carboxymethylstarch based sizing agents by ultrafiltration, and the parameters influencing the process were investigated in this study. The performance of the ultrafiltration process has been comparatively investigated at four different temperatures, 20°C, 30°C, 60°C and 90°C, and six different time periods, 0 to 240 minutes with 40 minutes intervals. The effect of a lubricant has also been investigated. Results indicate a considerable increase in concentrate concentration with prolonged operating times and elevated temperatures. The use of lubricant did not have a considerable effect on UF recovery efficiency, however, it passed to the permeate at elevated temperatures resulting in decrease in the COD charge reduction.Item Open Access Chemical composition, metabolizable energy and digestibility in pea seeds of differing testa and flower colors(Uludağ Üniversitesi, 2007) Canbolat, Önder; Tamer, Ece; Acikgoz, Esvet; Uludağ Üniversitesi/Ziraat Fakültesi/Zootekni Bölümü.; Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü.; Uludağ Üniversitesi/ Ziraat Fakültesi/Tarla Bitkileri Bölümü.Chemical composition, tannin content, metabolizable energy, organic matter digestibility and their relations with gas production were assessed in pea seeds of differing testa and flower color in 2003 and 2004. The pea genotypes were classified in five testa colors (white, light green, dark green, dark green-brown and brown-black) or in two flower colors (white and purple). Wide variation existed in the chemical composition of the investigated individual pea genotypes between testa color or flower color groups. Crude protein content for pea seed samples varied from 192.3 to 262.1 g kg-1 with average N-free extract of 667.4 g kg-1, crude fiber of 65.1 g kg-1 and ether extract of 21.4 g kg-1. In general, crude protein content was higher in dark green-brown and dark brown-black seeded and in purple flowered genotypes. Dark testa colored pea genotypes had higher tannin content in both years; however this variation was not statistically significant. Purple flowered genotypes had significantly higher tannin content than the white flowered genotypes. White and green seeded peas with white flowers had consistently higher metabolizable energy than dark brown or black seeds with purple flowers, with an average of 12.6 MJ/kg DM for white seeds and 11.3 MJ/kg DM for dark brown black seeds. Organic matter digestibility showed a similar pattern to metabolizable energy. Gas production profiles showed variations in both rate and extent of gas production among the pea groups. Gas production from white and green seeded or white flowered genotypes was always higher than those of dark seeded or purple flowered genotypes. The correlation coefficients between tannin content and metabolizable energy, organic matter digestibility and gas production were weak and mostly non-significant.