排序方式： 共有23条查询结果，搜索用时 15 毫秒
1.
Morteza Zendehdel Keyvan Hasani Vahab Babapour Sepideh Seyedali Mortezaei Yalda Khoshbakht Shahin Hassanpour 《Veterinary research communications》2014,38(1):11-19
The present study was designed to examine the effects of intracerebroventricular (ICV) injection of Dopamine (10, 20 and 40 nmol), L-DOPA (dopamine precursor; 62.5, 125 and 250 nmol), 6-OHDA (dopamine inhibitor; 75, 150 and 300 nmol), SCH 23390 (D1 antagonist; 2.5, 5 and 10 nmol), AMI-193 (D2 antagonist; 2.5, 5 and 10 nmol), NGB2904 (D3 antagonist; 3.2, 6.4 and 12.8 nmol), L-741 T742 (D4 antagonist; 1.5, 3 and 6 nmol) on food intake in FD3 chickens. At following, birds were ICV injected using 8-OH-DPAT (5-HT1A agonist; 15.25 nmol) and SB242084 (5-HT2C antagonist; 1.5 μg) prior dopamine (40 nmol) injection. Cumulative food intake was determined until 3 h post-injection. According to the results, dopamine significantly decreased food intake in chickens (p?<?0.05). The inhibitory effect of dopamine on food intake was decreased by SCH 23390 pretreatment (P?<?0.05), but AMI-193, NGB2904 and L-741, 742 had no effect on food intake induced by dopamine. In addition, hypophagic effect of dopamine was attenuated by SB242084 (P?<?0.05), but 8-OH-DPAT had no effect. These results suggest that dopamine decrease food intake via D1 receptor and there is an interaction between dopaminergic and serotonergic systems via 5-HT2C receptor in chickens. 相似文献
2.
Dastmalchi K Flores G Petrova V Pedraza-Peñalosa P Kennelly EJ 《Journal of agricultural and food chemistry》2011,59(7):3020-3026
Edible blueberry species are well recognized for their potential health benefits. Ericaceae fruits including the North American highbush blueberry (Vaccinium corymbosum L.) and five less common edible blueberry relatives from the New World tropics, Anthopterus wardii Ball, Cavendishia grandifolia Hoerold, Macleania coccoloboides A. C. Smith, Sphyrospermum buxifolium Poeppig & Endlicher, and Sphyrospermum cordifolium Benth, were investigated for their antioxidant properties and phenolic profiles. The neotropical berries C. grandifolia and A. wardii exhibited significantly higher 1,1-diphenyl-2-picrylhydrazyl (DPPH(?)) and 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) (ABTS(??+)) free radical scavenging and iron chelation activities than V. corymbosum. Total phenolic content and high-performance liquid chromatography with photodiode array detection (HPLC-PDA) compositional fingerprint analyses were also carried out. Significant correlations were observed among total phenolic contents, DPPH(?) and ABTS(??+) scavenging, and iron chelation activities. By use of HPLC-PDA, the phenolic constituents in the berries were identified as chlorogenic acid, p-coumaric acid, hyperoside, quercetin-3-O-glucoside, isoorientin, isovitexin, orientin and vitexin. Principal component analysis reduced the dimensions of antioxidant and total phenolic data to two components, which accounted for 95% of total variation among the six fruits. Each fruit species formed its own cluster, and therefore the antioxidant profile of each species was shown to be distinct. 相似文献
3.
Keyvan Karami Saeed Zerehdaran Ali Javadmanesh Mohammad Mahdi Shariati Hossien Fallahi 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2019,136(3):205-216
Imprinted genes display biased expression of paternal and maternal alleles in mammals. They are marked through epigenetic process during gametogenesis. Characterization of imprinted genes has expanded our understanding of the regulation and function of genes. In the current study, 22 experimentally validated imprinted genes in bovine (Bos Taurus) were analysed. Several supervised machine learning algorithms and attribute weighting methods were used to find characteristics of different types of imprinted genes and suggest a classification method for finding maternally and paternally expressed genes in bovine. For assessing the best model and comparing attributes in other organisms, we have also conducted a comparative analysis for human and sheep imprinted genes. According to the results of the present study, GC contents 10 and 100 kb upstream, Gly and Gln amino acids, Ile/ATC codon usage, LINE and SINE in 100kbup and length of first intron were significantly different between the maternal and paternal genes in cattle. Considering all species together, we found that GC content 100 kb up, LINE 100 kb up and the frequency of amino acids like Gly, Gln and Met were the most important attributes for identifying the paternal and maternal imprinted genes. These findings could imply conservation pattern in the attributes among these species. 相似文献
4.
In this study, the effect of maternal age on prepupae diapause of progeny in sexual (Wolbachia free) and asexual (Wolbachia infected) Trichogramma brassicae was studied at two temperatures. Maternal generation (G1) of both populations was reared at 10L:14D photoperiod, 14 and 20 °C, separately. Mated females from G1 were supplied with eggs of Ephestia kuehniella, each 48 h from one day after emergence to death. The tendency to diapause in progeny (G2) was determined by rearing at 10 °C. According to the results, reproductive modes, maternal temperature and age have significant effect on the mean number of eggs laid by G1 and the diapause percentage of G2. Offspring whose maternal generation was reared at 20 °C had higher diapause percentage than those reared at 14 °C. Diapause percentage in sexual population was higher than the asexual, which demonstrates a negative effect of Wolbachia on this process. Wolbachia infection modifies the effect of maternal age on the diapause percentage in the offspring at 20 °C but not at 14 °C. The result can be due to lower Wolbachia density at 14 °C and greater Wolbachia density at 20 °C. 相似文献
5.
Mohammad Hasani Gholamreza Savaghebi Hosein Sheikh Sofla 《Journal of plant nutrition》2016,39(6):749-755
The influence of foliar application of 1% urea and four rates of urea (100, 200, 300 and 400 g tree?1) as soil application (deep fertilizer placement) were studied on leaf nutrients concentrations, yield and fruit quality of ‘Malas e Torsh e Saveh’ pomegranate (Punica granatum L.) during 2010 and 2011 growing seasons. Trees that received 300 and 400 g urea as soil application showed positive significant response on fruit yield, average fruit weight, aril weight percent of fruit, 100 arils weight, fruit diameter and TSS. Foliar application of urea had also significant effects on average fruit weight, aril weight percent of fruit and 100 arils weight. Nitrogen concentration increased linearly in leaves with the increase in rate of urea-applied. According to results, deep soil application of urea under the conditions of this study was more effective on pomegranate fruit yield and quality characters than foliar application of urea. 相似文献
6.
The most performance quality of cut-pile carpets is related to mechanical behavior of surface piles under compression loading in use. In this study, main purpose was to achieve the predictive models of the functional compression properties of carpet including work of compression (WC), compressional resilience (RC), linearity of compression-thickness curve (LC), and thickness loss (TL) after recovery on hand-knotted carpets with symmetric (Turkish) knot. Eighteen hand-knotted carpet samples with different structural specifications were produced. Meanwhile, compression properties were investigated in new and worn out carpet samples by a Hexapod tumbler tester in 4000 and 12000 revolutions. Factorial experimental design and response surface method were applied for modeling of each compression properties. To optimize the initial models the Box-Cox transformation was used. In the final models, contribution of different variables was also determined. The models showed a desirable fit and high adjusted R2 values were observed. The ANOVA test showed that the obtained models are valid at 5 % level significant. 相似文献
7.
Mosavari N Feizabadi MM Jamshidian M Shahpouri MR Forbes KJ Pajoohi RA Keshavarz R Taheri MM Tadayon K 《Veterinary microbiology》2011,151(1-2):148-152
Restriction fragment length polymorphism (RFLP) genotyping was employed to analyze the population genetics of Mycobacterium bovis in Iran. One hundred and twenty-three isolates collected from slaughtered tuberculosis-suspect cattle and one clinically asymptomatic buffalo were subjected to RFLP analysis with probes of the polymorphic GC-rich sequence (PGRS) and the direct repeat sequence (DR) using DNA digested with PvuII and AluI. All these methods detected a large homogeneous population in which only a few isolates had variant genotypes. Only AluI-based RFLPs of both the PGRS and DR sequences were able to clearly differentiate between BCG and field strains of M. bovis. As in previous reports, these findings seem to reflect a recent dispersal of one or a few strains in Iran following the substantial expansion of Holstein-Friesian cattle over the last few decades. 相似文献
8.
Tadayon K Forbes K Soleimani D Pajoohi RA Marhmati B Javidi J Keshavarz R Soleimani K Shakibamehr A Taheri MM Pour SD Mosavari N 《Veterinary microbiology》2011,151(1-2):192-199
In 1931 Carpantier reported bovine TB (BTB) in Iranian cattle. Some eighty years on with a national test-and-slaughter programme in place for over four decades, the efforts to vanquish Mycobacterium bovis (M. bovis) infection in cattle have been in vain as the vast majority of the 30 Iranian provinces still have reports of BTB in their cattle herds every year. This paper reviews the present epidemiology of BTB in Iran and in the region and evaluates the success of government policy in controlling this disease. 相似文献
9.
Moslemizade N Rafiei A Yazdani F Hosseini-khah Z Yusefnezhad K 《Pakistan journal of biological sciences: PJBS》2011,14(2):106-111
Preeclampsia is a disease regarding with altered vascular reactivity leading to hypertension of the mother and metabolic alterations in the fetus. This study aimed to assess nitric oxide and bleeding time following administration of magnesium sulfate to preeclamtic patients compared to normotensive pregnant women. A total of 112 subjects (56 preeclamtic patients and 56 normotensive pregnant controls) were enrolled in this case-control study. Cases and controls were matched for age, BMI, gestational age, parity and gravidity. Total concentration of nitrite and nitrate (NOx) was measured before and during magnesium sulfate (MgSO4) treatment using a modified Griess-based method. RESULTS: Systolic and diastolic blood pressures were significantly decreased during MgSO4 treatment in preeclamtic patients (p < 0.0001). NOx levels were significantly increased in preeclamtic women after MgSO4 administration (33.7 +/- 18.5 vs. 50.2 +/- 21.6, p < 0.0001) but it was not seen in normotensive parturients (52.4 +/- 28.9 vs. 57.3 +/- 21.7, p = 0.362). The bleeding time was scarcely increased following magnesium sulfate treatment in preeclamptic patients compared to normotensive pregnant women but it was not significant (p = 0.18). In addition, there was only a significantly reverse correlation between NOx levels and systolic or diastolic blood pressure in preeclamtic parturients after MgSO4 treatment (r = -0384; p = 0.003 and r = -0.29; p = 0.03, respectively). This study demonstrates that administrating MgSO4 to preeclamtic patients induced significant changes in NOx production which had a major role in modulating vasculature changes in preeclamsia. 相似文献
10.
Ma C Dastmalchi K Whitaker BD Kennelly EJ 《Journal of agricultural and food chemistry》2011,59(17):9645-9651
Fruits of the cultivated eggplant species Solanum melongena and its wild relative Solanum incanum have a high content of hydroxycinnamic acid conjugates, which are implicated in the human health benefits of various fruits and vegetables. Monocaffeoylquinic acid esters, in particular 5-O-(E)-caffeoylquinic acid, are usually predominant in solanaceous fruits and tubers. Two closely related caffeoylquinic acid derivatives with longer C(18) HPLC retention times than those of monocaffeoylquinic acids are minor constituents in cultivated eggplant fruit. In a prior study, the two compounds were tentatively identified as 3-O-acetyl- and 4-O-acetyl-5-O-(E)-caffeoylquinic acids and composed ≤2% of the total hydroxycinnamic acid conjugates in fruit of most S. melongena accessions. It was recently found that the pair of these caffeoylquinic acid derivatives can compose 15-25% of the total hydroxycinnamic acid conjugates in fruits of S. incanum and wild S. melongena. This facilitated C(18) HPLC isolation and structural elucidation using (1)H and (13)C NMR techniques and HR-ToF-MS. The isomeric compounds were identified as 3-O-malonyl-5-O-(E)-caffeoylquinic acid (isomer 1) and 4-O-(E)-caffeoyl-5-O-malonylquinic acid (isomer 2). Both exhibited free radical scavenging activity, albeit about 4-fold lower than that of the flavonol quercetin dihydrate. By contrast, the iron chelation activities of isomers 1 and 2, respectively, were about 3- and 6-fold greater than that of quercetin dihydrate. Reports of malonylhydroxycinnamoylquinic acids are rare, and only a few of these compounds have been structurally elucidated using both NMR and MS techniques. To the authors' knowledge, these two malonylcaffeoylquinic acid isomers have not previously been reported. 相似文献