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21.
The purpose of the study was to evaluate ischaemia/reperfusion injury in simulated abomasal volvulus in sheep. Sixteen ewes
were randomly allocated to three groups. The control group (n = 4) served as sham-operated controls. The animals of the ischaemia group and reperfusion group (n = 6, each) underwent a simulated ‘abomasal volvulus’. The abomasum was exteriorized under general inhalation anasthesia and
forced into a 180∘ anticlockwise rotation around its longitudinal axis, followed by another 270∘ anticlockwise rotation around its transectional axis. All ewes were monitored for 4 h. In the reperfusion group, volvulus
was released after 3 h (i.e., 1 h of reperfusion). In the ischaemia group, the volvulus remained for 4 h (no reperfusion).
Vital signs were monitored and some haematological and biochemical parameters were measured, without any significant differences.
Full-section biopsy specimens were taken at the 3rd and 4th hours from the greater curvature of the abomasum. Histopathological
lesions were scored according to the severity of mucosal oedema, submucosal oedema, haemorrhage submucosal and submuscularis
layers, and polymorphonuclear infiltration on a scale of 0 to 4 (nil, mild, moderate, severe, and extreme). Another biopsy
specimen was taken at the 4th hour for transmission electron microscopic examination. The scored lesions in light-microscopic
examination were significantly different at the 3rd and 4th hours between the control and the experimental groups (p<0.05). There was no significant difference between the reperfusion and ischaemia groups (p>0.1). Within-group comparisons (3rd hour with 4th hour) revealed no significant differences. In transmission electron microscopic
examination there were no remarkable changes in the control group, but in the ischaemia and reperfusion groups there were
remarkable cellular (epithelial and goblet cells), mitochondrial and microvillous changes that strongly implied the occurrence
of ischaemia (p<0.05). In transmission electron-microscopic examination of abomasal samples the lesions were more remarkable in reperfusion
group than in the ischaemia group. It is concluded that ischaemia/reperfusion injury occurred in this model of simulated abomasal
volvulus in sheep and that ischaemia/reperfusion injury should be considered as a potential determining factor in the outcome
of cattle with abomasal volvulus. 相似文献
22.
Nassimi Zohreh Taheri Parissa Kong Xi Dong Wubei Tarighi Saeed 《European journal of plant pathology / European Foundation for Plant Pathology》2021,160(2):469-485
European Journal of Plant Pathology - Plant antimicrobial peptides (AMPs) as a part of plant defense responses, are small soluble defense molecules which can inhibit the growth of pathogens. This... 相似文献
23.
Abstract Extract Cloisonné kidney, though considered to be a non-clinical entity, has a pathological significance in certain animals, as has been reported in goats from many countries (1) (2) . Pigmentation of renal cortical tubules has also been observed in horsesc (4) . However, no reports are yet available on such a condition in sheep. This communication therefore presents observations on cloisonne kidney in an Iranian sheep. 相似文献
24.
Nikookar SH Hajheydari Z Moosa-Kazemi SH Mahmoudi M Shahmohammadi S 《Pakistan journal of biological sciences: PJBS》2012,15(2):103-107
Dermatitis caused by stimulation of beetle paederus, is a common health problem in Northern and some southern parts of Iran. Since by now, traditional medicine and some corticosteroid agents have been used for treatment of dermatitis caused by beetle paederus. Because, there are few researches about classical treatment of the disease at academic level, this study planned to compare the effectiveness of triamcinolone ointment and atorvastatin tablet with placebo in treatment ofpaederus dermatitis in Northern Iran. A randomized double-blind clinical trial was carried out on 30 patients referred to the hospital and clinics at Sari and Neka countries in Northern Iran during 6 months. Patients were randomly divided into two therapeutic equal groups. The first group was triamcinolone ointment twice a day and a placebo atorvastatin tablet daily. The second group was oral atorvastatin one tablet (20 mg) daily and a placebo triamcinolone ointment twice a day. In Seventh day of visits, therapeutic response of the patients in triamcinolone and atorvastatin group were 93.33 and 80%, respectively. No significant differences were found in therapeutic outcome between the two groups (p > 0.05). The results showed both oftriamcinolone ointment and oral atorvastatin had similar effect on paederus dermatitis. Because the paederus dermatitis is a self-limited disease use of topical therapy for treatment of the disease is recommend. 相似文献
25.
The aim of this research was to identify species suitable for plantation. We first identified species for potentially suitable for plantation based on ecological capabilities regarding soil properties. We determined the area of plantation for different species based on ecological capabilities. Then, we collected relevant data such as growth patterns of different species, labor requirements for plantation and plantation cost. A linear programming model and two integer linear programming models were used for optimization. The appropriate species based on ecological capabilities were ash, elm, maple, oak and bald cypress. A linear programming model was used based on ecological capabilities classification to determine the land area of different species for plantation. Then, two integer linear programming models were employed to select the species for plantation. We set ecological properties unequal for all of the species in the first run of the integer programming model. Two groups were classified: group one included maple and ash; group two included bald cypress, oak and elm. The second integer programming model assumed equal ecological properties for all the species. Results of linear programming showed that maple and bald cypress were appropriate for plantation at the site and their plantation areas should be 151.3 and 355.3 ha, respectively. Results of the first integer linear programming model showed that maple and bald cypress would be economically profitable for plantation. The results of the second integer linear programming model showed that only bald cypress would be appropriate for plantation. 相似文献
26.
To investigate the effect of boric acid on yield and yield components of three white bean cultivars consisted of Jules, G11867, and Shekoofa, a 2-year field split-plot experiment was carried out based on a randomized complete block design with three replications during 2013 and 2014. Boron treatments consisted of 1 – control (no boric acid), 2 and 3 – application of 2 and 4?kg ha?1 of boric acid by irrigation water, respectively, 4 and 5 – foliar spray of 0.025% and 0.05% of boric acid solutions, respectively, and 6 – combination of 2?kg ha?1 of boric acid in irrigation water?+?foliar spray by 0.025% boric acid solution. Boron application significantly increased yield and its components in respect to control. The highest grain yields of all cultivars were obtained from application of 2?kg ha?1 boric acid mixed in irrigation water?+?foliar spray by 0.025% of boric acid solution. 相似文献
27.
Efficacy and hypnotic effects of melatonin in shift-work nurses: double-blind,placebo-controlled crossover trial 总被引：1，自引：0，他引：1
Khosro Sadeghniiat-Haghighi Omid Aminian Gholamreza Pouryaghoub Zohreh Yazdi 《Journal of circadian rhythms》2008,6(1):10
Background
Night work is associated with disturbed sleep and wakefulness, particularly in relation to the night shift. Circadian rhythm sleep disorders are characterized by complaints of insomnia and excessive daytime sleepiness that are primarily due to alterations in the internal circadian timing system or a misalignment between the timing of sleep and the 24-h social and physical environment. 相似文献28.
Maleki S Seyyednejad SM Damabi NM Motamedi H 《Pakistan journal of biological sciences: PJBS》2008,11(9):1286-1289
The aim of this study was to examine the antimicrobial activity of the methanolic extract of Torilis leptophylla was tested on eleven bacteria (Bacillus anthracis, Bacillus subtilis, Bacillus pumilus, Staphylococcus aureus, Bacillus licheniformis, Brucella melitensis, Escherichia coli, Salmonella typhi, Proteus mirabilis, Bordetella bronshiseptica and Pseudomonas aeruginosa). Tested extract was effective against all bacteria but not B. subtilis. Consequently, the ethanolic extract had antibacterial activity on some pathogens thus confirming their use in folk medicine. 相似文献
29.
Amiri Z Mohammad K Mahmoudi M Zeraati H Fotouhi A 《Pakistan journal of biological sciences: PJBS》2008,11(8):1076-1084
This study is designed to assess the application of neural networks in comparison to the Kaplan-Meier and Cox proportional hazards model in the survival analysis. Three hundred thirty gastric cancer patients admitted to and surgically treated were assessed and their post-surgical survival was determined. The observed baseline survival was determined with the three methods of Kaplan-Meier product limit estimator, Cox and the neural network and results were compared. Then the binary independent variables were entered into the model. Data were randomly divided into two groups of 165 each to test the models and assess the reproducibility. The Chi-square test and the multiple logistic model were used to ensure the groups were similar and the data was divided randomly. To compare subgroups, we used the log-rank test. In the next step, the probability of survival in different periods was computed based on the training group data using the Cox proportional hazards and a neural network and estimating Cox coefficient values and neural network weights (with 3 nodes in hidden layer). Results were used for predictions in the test group data and these predictions were compared using the Kaplan-Meier product limit estimator as the gold standard. Friedman and Kruskal-Wallis tests were used for comparisons as well. All statistical analyses were performed using SPSS version 11.5, Matlab version 7.2, Statistica version 6.0 and S_PLUS 2000. The significance level was considered 5% (alpha = 0.05). The three methods used showed no significance difference in base survival probabilities. Overall, there was no significant difference among the survival probabilities or the trend of changes in survival probabilities calculated with the three methods, but the 4 year (48th month) and 4.5 year (54th month) survival rates were significantly different with Cox compared to standard and estimated probabilities in the neural network (p < 0.05). Kaplan-Meier and Cox showed almost similar results for the baseline survival probabilities, but results with the neural network were different: higher probabilities up to the 4th year, then comparable with the other two methods. Estimates from Cox proportional hazards and the neural network with three nodes in hidden layer were compared with the estimate from the Kaplan-Meier estimator as the gold standard. Neither comparison showed statistically significant differences. The standard error ratio of the two estimate groups by Cox and the neural network to Kaplan-Meier were no significant differences, it indicated that the neural network was more accurate. Although we do not suggest neural network methods to estimate the baseline survival probability, it seems these models is more accurately estimated as compared with the Cox proportional hazards, especially with today's advanced computer sciences that allow complex calculations. These methods are preferable because they lack the limitations of conventional models and obviate the need for unnecessary assumptions including those related to the proportionality of hazards and linearity. 相似文献
30.
Jannatabadi AA Mohammadi GR Rad M Maleki M 《Pakistan journal of biological sciences: PJBS》2008,11(3):468-471
The objective of this study was to evaluate the existence of Streptococcus equi subsp. equi and Streptococcus equi subsp. zooepidemicus as probable agents associated with naturally occurring infection of the equine upper respiratory disease in Mashhad area. Nasal swabs samples from thirty horses with upper respiratory tract infections were collected. The bacteria isolated and identified were Streptococcus equi subsp. equi (1 isolate), Streptococcus equi subsp. zooepidemicus (25 isolates), Pasteurella sp. (11 isolates), Staphylococcus sp. (17 isolates), Bacillus sp. (4 isolates), Pseudomonas sp. (4 isolates), Proteus sp. (1 isolate), Neisseria sp. (1 isolate) and E. coli (1 isolate). All 25 isolates of Streptococcus equi subsp. zooepidemicus and the isolate of Streptococcus equi subsp. equi were characterized by biochemical tests and molecular techniques. For molecular identification of the subspecies S. equi and S. zooepidemicus two genomic region SeM and sodA were amplified. This study is the first report of molecular identification of Streptococcus equi subsp. equi and Streptococcus equi subsp. zooepidemicus in Iran. 相似文献