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21.
Alizadeh Fatemeh Moradian Fatemeh Farhadi Ayoub 《Tropical animal health and production》2020,52(6):3027-3034
Insulin-like growth factor-binding protein acid-labile subunit (IGFALS) encodes a protein which binds to IGF1 and IGFBP-3 to regulate the growth, differentiation, and other physiological processes. The aim of this study was the identification of allelic polymorphisms of the IGFALS gene using the PCR-RFLP technique and evaluation of their association with growth traits. For this end, 120 blood samples were randomly collected from each breed. Following amplification of an 1113-bp fragment of exon 1 and a part of intron 1 of the IGFLAS gene, genotyping was conducted by three restriction enzymes including HinfI, MscI, and PvuII. The results showed that only one allele was observed in IGFALS-PvuII site, while in IGFLAS-MscI site, three AA, AB, and BB genotypes with the frequencies of 17.5%, 32%, and 50.5% and 11%, 37.5%, and 51.5% were observed in Makouei and Ghezel sheep breeds, respectively. Additionally, in the IGFLAS-HinfI site, two AB and BB genotypes with the frequency of 34.2% and 65.8% were observed in Makouei sheep and AA, AB, and BB genotypes with the frequency of 9%, 21%, and 70% were observed in Ghezel sheep. So that, Makouei sheep with AB genotype had more chest girth (CG) compared with other genotypes. Furthermore, a significant association was observed between the genotypes of IGFLAS-HinfI with birth weight (BW) in Ghezel and BW, weaning weight (BW3), and CG in Makouei sheep. Haplotype analysis revealed an association between paternal haplotypes and BW in both Ghezel and Makouei breeds. So that, AAB and ABB haplotypes showed more BW than others in Makouei and Ghezel sheep, respectively.
相似文献22.
Impacts of the Cretaceous Terrestrial Revolution and KPg extinction on mammal diversification 总被引：1，自引：0，他引：1
Meredith RW Janečka JE Gatesy J Ryder OA Fisher CA Teeling EC Goodbla A Eizirik E Simão TL Stadler T Rabosky DL Honeycutt RL Flynn JJ Ingram CM Steiner C Williams TL Robinson TJ Burk-Herrick A Westerman M Ayoub NA Springer MS Murphy WJ 《Science (New York, N.Y.)》2011,334(6055):521-524
Previous analyses of relations, divergence times, and diversification patterns among extant mammalian families have relied on supertree methods and local molecular clocks. We constructed a molecular supermatrix for mammalian families and analyzed these data with likelihood-based methods and relaxed molecular clocks. Phylogenetic analyses resulted in a robust phylogeny with better resolution than phylogenies from supertree methods. Relaxed clock analyses support the long-fuse model of diversification and highlight the importance of including multiple fossil calibrations that are spread across the tree. Molecular time trees and diversification analyses suggest important roles for the Cretaceous Terrestrial Revolution and Cretaceous-Paleogene (KPg) mass extinction in opening up ecospace that promoted interordinal and intraordinal diversification, respectively. By contrast, diversification analyses provide no support for the hypothesis concerning the delayed rise of present-day mammals during the Eocene Period. 相似文献
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Ayoub Salari Taghi Tabarsa Abolghasem Khazaeian Ahmadreza Saraeian 《Journal of Wood Science》2012,58(6):513-524
In this study, the effect of nanoclay on some applied properties of oriented strand board (OSB) made from underutilized low quality paulownia wood was investigated. Organo-modified montmorillonite (MMT) at four levels (0, 1, 3 and 5?%) was added to urea formaldehyde (UF) resin. Some chemical properties of paulownia wood (holocellulose, cellulose, lignin and ash contents, pH value and hot and cold water solubility), mechanical [modulus of rupture (MOR), modulus of elasticity (MOE), internal bond strength, screw and nail withdrawal strengths], physical (water absorption and thickness swelling) properties and formaldehyde emission of the strand boards were evaluated. Mechanical properties of all panels complied with the general-purpose OSB minimum property requirements of European Norm. With increasing 5?% nanoclay to UF resin, mechanical and physical properties of the resulting panels improved and formaldehyde emission decreased. However, none of the panels satisfied the thickness swelling and water absorption requirement. The results of X-ray diffraction and transmission electron microscope analysis confirmed the good dispersion of nanoclay in the resulting OSBs. Using paulownia as a fast-growing underutilized species not only can sustain the forests but also can supply raw material to countries facing shortage of wood. 相似文献
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The effect of step-feed on biological ammonia nitrogen (NH3-N) removal in a rotating biological contactor (RBC) system consisting of two three-stage units (one control and one step-feed) treating synthetic wastewater was examined. The performance of the step-feedRBC was evaluated in comparison to a regularly fed RBC in terms of NH3-N removals and stage-dissolved oxygen (DO) conditions over a range of hydraulic and organic loading rates (HLR = 0.032 to 0.125 m3 m-2. d-1 and OLR = 11.03 to 111.6 g COD m-2. d-1). The results indicate that the step-feed unit showed better removal efficiency (%) at high HLR and ORL than the regularly fed control unit. Increasing the HLR and the OLR resulted in a decrease in DO in all the stages of the two units. However, DO values in the step-feed system were higher than those recorded for the control system. In addition, O2 limiting conditions (DO ≤ 2 mg l-1) and heavy growth of Beggiatoa were detected in stage 1 of the control unit at high loading rates. 相似文献
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George M. Ayoub 《Water, air, and soil pollution》1973,2(4):409-426
Experiments were conducted to study the behavior of axi-symmetric turbulent buoyant jets injected horizontally in a cross flowing current. Experimental work was simulated by injecting a fluid emanating from a. round nozzle into a fluid of lighter density flowing in a wide channel at approximately uniform flow. A salt tracer technique was used for jet dispersion studies. In this study, material concentration profiles were measured across various sections along jets of different parametric values. From these profiles, concentration distribution curves as well as maximum concentration and dilution values and their variation with distance along the jet were determined. Half jet radius values were calculated to study the expansion of the jet. Jet boundaries and trajectories were studied photographically and compared with measured values. The effect of the ambient current on the overall shape of the jet was established by the study of the measured complete concentration section across the jet. 相似文献
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Nawwar M Hussein S Ayoub N Hashim A El-Sharawy R Lindequist U Harms M Wende K 《Fitoterapia》2011,82(8):1265-1271
Assessment of the UV protecting potential of an aqueous methanol leaf extract of Harpephyllum caffrum proved that it possesses a distinct radical scavenging effect and inhibits the production of the proinflammatory cytokine IL-6 by human keratinocytes (HaCaT cells) following UV radiation. Phytochemical investigation of this extract led to isolation and structural determination of the hitherto unknown phenolics, kaempferol 3-O-(2″-sulphatogalactopyranoside), its quercetin analogue and 3-methoxyellagic acid 4-O-galactopyranoside in addition to 18 known phenolic compounds. The structures were determined by spectroscopic and conventional methods of analysis. Flavonoid sulphatoglycosides which have been rarely found in nature were major phenolic constituents of this plant, and this is the first report of the isolation of any of them from Anacardiaceae. The extract was found to diminish UV phototoxic reaction of keratinocytes. However, the isolated kaempferol sulphatogalactopyranoside did not interact with UVB triggered IL-6 production of HaCaT keratinocytes. 相似文献
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A. T. Ayoub 《The Journal of Horticultural Science and Biotechnology》2013,88(1):163-168
Lentil plants of the Beladi type were grown at various NaCl levels under laboratory, greenhouse and field conditions with the object of determining the salt tolerance limits. Salt tolerance was much higher during germination than during subsequent growth. A 50% reduction in germination occurred at about 20.0 mmhos cm-1. Seed yield was reduced to 50% at soil salinity of about 3.9 mmhos cm-1. Plant survival, pod formation and seed quality were adversely affected by higher salt levels. Total nitrogen in the kernel decreased with rising soil NaCl levels while that of the husk increased. 相似文献