排序方式： 共有38条查询结果，搜索用时 62 毫秒
1.
Izci C Celik I Alkan F Ogurtan Z Ceylan C Sur E Ozkan Y 《American journal of veterinary research》2002,63(5):688-694
OBJECTIVE: To evaluate the efficacy of topical administration of a 2% solution of cyclosporine (CsA) for treatment of dogs with keratoconjunctivitis sicca (KCS) and to correlate results with histopathologic characteristics and local cellular immunity of the gland of the third eyelid. ANIMALS: 24 dogs with bilateral KCS. PROCEDURE: Lacrimal secretion was measured, using Schirmer tear test (STT) strips. Leukocyte and T-lymphocyte subsets were determined in blood samples. Histopathologic changes as well as CD4+, CD8+, and alpha-naphthyl-acetate esterase-positive (ANAE+) lymphocytes were evaluated. RESULTS: Clinical signs resolved at the end of 1 month in conjunction with significantly increased STT values, compared with baseline values. Fifteen and 30 days after discontinuation of CsA treatment, a decrease was observed in STT values in both eyes; however, only values for the right eye were significantly different. There was a significant decrease in the number of lymphocytes and ANAE+ lymphocytes 15 and 30 days after discontinuation of CsA treatment, compared with baseline values. Differences were not observed in number of CD4+ lymphocytes among treatment groups. However, there was a significant decrease in number of CD8+ lymphocytes with reversal of the CD4+:CD8+ in both eyes after CsA treatment for 30 days, compared with the control group. Increased secretory activity and decreased lymphocyte infiltration were characteristic histopathologic findings. CONCLUSIONS AND CLINICAL RELEVANCE: Topical administration of a 2% solution of CsA was effective for the treatment of dogs with KCS. Strict follow-up monitoring is required after the cessation of treatment because of the possibility of recurrence of KCS. 相似文献
2.
1. This study compared the development of thermal resistance of the feather coat in broilers, with early or late feathering genes, and with or without the naked neck gene, allowed ad libitum or restricted feeding. 2. Male and female broilers of one of the 4 genotypes were reared to 6 weeks of age and allocated to one of the two feeding regimes. The thermal resistance of the back and crop region was measured at weekly intervals. A sample of birds were killed at the same ages and total feather weight, primary and secondary flight feather weight, liver weight and abdominal fat weight were measured. 3. All three main factors, sex, feeding and genotype, had significant effects on feather weight over time. The primary and secondary flight feathers were less affected by feed restriction than the feather coat as a whole. Birds with the naked neck gene showed a greater depression in growth rate than birds with a normal neck under conditions of restricted feeding. 4. The thermal resistance of the feathers on the back was greater in females, increased by early feather growth and decreased by restricted feeding. 5. Relative to metabolic body size, birds on restricted feeding had a greater feather weight and a smaller liver. There was a marked reduction in fat deposition, to almost negligible levels by 6 weeks of age. 6. Broilers given restricted feeding, in preparation for breeding, would benefit by a warmer environment, particularly those with feathering genotypes which confer a lower thermal resistance. 相似文献
3.
No DNA loss in autotetraploids of Arabidopsis thaliana 总被引：1，自引：0，他引：1
To address the issue of genome evolution in autopolyploids and particularly to investigate whether rapid sequence elimination also occurs in autopolyploids as in allopolyploids, amplified fragment length polymorphism (AFLP) fingerprinting was employed to examine a large number of genomic loci in F1 hybrids between two different autotetraploids of Arabidopsis thaliana accessions, namely Ler and Col. Using this approach, perfect additivity in the F1 hybrids was found between the newly‐formed autopolyploids when compared with their parental lines. Using flow cytometry, the study was extended in a quantitative manner, in which the nuclear DNA contents in one autotetraploid A. thaliana accession Ler, was determined. The increase in genome size of the autotetraploid line was additive. Taken together, no evidence was found for genome size reduction due to autopolyploidization of A. thaliana. The results indicating that there was no DNA loss in autotetraploid A. thaliana suggest that a different type of genome evolution may occur in autopolyploids during the initial stages of their formation when compared with allopolyploids. 相似文献
4.
5.
Neural networks with artificial bee colony algorithm for modeling daily reference evapotranspiration 总被引：2，自引：1，他引：1
The study investigates the ability of artificial neural networks (ANN) with artificial bee colony (ABC) algorithm in daily
reference evapotranspiration (ET0) modeling. The daily climatic data, solar radiation, air temperature, relative humidity, and wind speed from two stations,
Pomona and Santa Monica, in Los Angeles, USA, are used as inputs to the ANN–ABC model so as to estimate ET0 obtained using the FAO-56 Penman–Monteith (PM) equation. In the first part of the study, the accuracy of ANN–ABC models is
compared with those of the ANN models trained with Levenberg–Marquardt (LM) and standard back-propagation (SBP) algorithms
and those of the following empirical models: The California Irrigation Management System (CIMIS) Penman, Hargreaves, and Ritchie
methods. The mean square error (MSE), mean absolute error (MAE) and determination coefficient (R2) statistics are used for evaluating the accuracy of the models. Based on the comparison results, the ANN–ABC and ANN–LM models
are found to be superior alternative to the ANN–SBP models. In the second part of the study, the potential of the ANN–ABC,
ANN–LM, and ANN–SBP models in estimation ET0 using nearby station data is investigated. 相似文献
6.
Saim Ates Hasimet R. Kara Cag˘ri Olgun Osman E. Ozkan 《Wood material science & engineering》2017,12(3):158-164
This work investigated some mechanical, physical and free formaldehyde emission properties of heat-treated MDF. For this purpose, MDF panels were subjected to varying heat treatment temperatures (155°C, 165°C and 175°C), durations (2.5?h., 3.5?h. and 4.5?h.) and waiting times after hot pressing (30?min., 120?min. and 600?min). Thickness swelling (TS), water absorption (WA), free formaldehyde emission (FFE), bending strength (BS), modulus of elasticity (MOE), tensile strength perpendicular to fibers (TSPF) for treated and untreated samples were tested and evaluated statistically. Consequently, after the heat treatment values of tensile strength, bending strength and modulus of elasticity were almost negatively affected relatively, but the thickness swelling and water absorption and quantities of free formaldehyde were improved positively of MDF samples. 相似文献
7.
Nimet Sema Gencer Nabi Alper Kumral H. Ozkan Sivritepe Melis Seidi Hilal Susurluk Bulent Senturk 《Phytoparasitica》2009,37(3):217-224
The spider mites Tetranychus urticae Koch and Panonychus ulmi (Koch) (Tetranychidae) cause severe economic losses to vegetable farms and deciduous fruit orchards in Turkey. One of their
predators, the ladybird beetle Stethorus gilvifrons (Muls.) (Col., Coccinellidae), aggregates on mite-infested patches of plants. The present study assessed whether there is
a role for herbivore-induced plant volatiles (HIPVs) and/or odors emitted directly from these two mite species in the aggregative
response of ladybird beetles. The olfactory responses of the predator females to volatiles from T. urticae- and/or P. ulmi-infested sweet pepper (four cultivars, viz. ‘Demre’, ‘Yalova Carliston’, ‘Kandil Dolma’ and ‘Yag Biberi’), kidney bean (cv.
‘Barbunya’) and apple (M9 rootstock) were investigated using a two-choice olfactometer. Our results showed that HIPVs emitted
from both T. urticae- and P. ulmi-infested plants significantly attracted S. gilvifrons adults for all plants except the sweet pepper cv. Yag Biberi. In addition, it was found that volatiles from apple plants
infested by T. urticae and, especially, P. ulmi are more attractive for S. gilvifrons females than those emitted by other infested plants. The results also suggest that the odors of T. urticae adults and their products might influence the attraction of S. gilvifrons females. 相似文献
8.
There is still uncertainty about the etiology and pathogenesis of abomasal displacement. Changes in total and ionized calcium are considered to be important pieces in the mosaic of causative factors. The present study on pre- and postoperative clinical chemical changes revealed a preoperative reduction in ionized calcium values. The reduction seemed mainly to be due to changes in the pH of blood. 相似文献
9.
Rafet Aslantas Ilker Angin Mustafa Gokalp Boydas Gursel Ozkan Mazhar Kara 《Erwerbs-Obstbau》2016,58(2):127-134
The variability in fruit maturity and quality has difficulties in determining the optimal harvesting maturity. Therefore, maturity stage in harvest is crucial for both fruit quality and minimizing the fruit detachment force. This study investigates the fruit characteristics and detachment parameters of sour cherry (cv. ‘Kütahya’) in terms of different maturity stages. Sour cherries were grouped into five different maturity stages by observation according to their color and dimensions. The fruit mass and dimension increased as a function of maturity stage; however, the fruit mass remained almost same after the 4th stage. The highest values of total soluble solids and titrable acid contents of sour cherry were gained in the last stage of maturity. The value of chroma of fruit outer color was higher 50?% than that of fruit inner color in the 1st maturity stage. However, it was almost same in the 5th stage of maturity. Increasing fruit maturity caused a decrease in the values of fruit detachment force ranging from 4.25 to 1.78 N, giving the coefficient of determination of 0.947. Similarly, the ratio of fruit detachment force to fruit mass, detachment stress, and specific energy decreased as the fruit maturity increased. The harvest of sour cherry is done only once in the optimum time to decrease the harvest cost. Minimizing the variability in fruit maturity throughout the tree is essential for gaining the maximum profit and lower fruit detachment force in this convenient time. Results of this study indicated that 3rd?5th maturity stages were critical for harvest. In order to attain the maximum poundage per tree and color for the market the most of the fruits should be in these stages. Therefore, appropriate management strategies that could homogenize the maturity throughout the tree should be applied. 相似文献
10.
Cem Ozkan 《Journal of pest science》2006,79(1):27-29
Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae) is recorded as a new factitious host for the solitary egg-larval parasitoid, Chelonus oculator Panzer (Hymenoptera: Braconidae). A short biology and rearing method of the parasitoid on the new host were studied at 30±1°C,
60–70% relative humidity, with a photoperiod of 16:8 (L: D). Chelonus eclosed from 74.60% of parasitized hosts. No significant difference was found between development times of male and female
parasitoids. Development of the parasitoid was completed in 28.14±0.47 days in male, and 28.87±0.58 days in female. However,
a significant difference was found between adult sizes of male and female parasitoids. Adult dry mass was found 0.88±0.04 mg
in male, and 1.99±0.11 mg in female. In addition, C. oculator was successfully reared from P. interpunctella in twenty generations with the explained method. Significant knowledge about biology of C. oculator is still lacking. However, the parasitoid can be candidate for future research as a biological control agent against some
important lepidopteran pests, and P. interpunctella may be suitable factitious host for mass rearing of C. oculator. 相似文献