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71.
A. Halajnia S. Oustan N. Najafi A. R. Khataee A. Lakzian 《Communications in Soil Science and Plant Analysis》2016,47(9):1162-1175
The potential use of a layered double hydroxide (magnesium aluminum nitrate (Mg-Al)-LDH) to suppress the leaching of nitrate from a calcareous sandy loam soil and to enhance the nitrogen utilization efficiency of maize was assessed. The results of column studies showed that nitrate leaching efficiently decreased by 24, 46, and 76% compared to control when 2.5, 5, and 10 g LDH kg–1 soil were applied, respectively. Nitrate leaching was also reduced by use of LDH in pot experiments. The hindrance effect of LDH in using ammonium nitrate was higher than urea. Application of 2.5, 5, and 10 g LDH kg–1 soil increased mean nitrogen uptake of maize by 14, 20, and 44% over the control. The studied LDH has a potential to be used as a nitrate-selective exchanger to reduce risks of nitrate leaching. However, the use of Mg-Al-LDH (4:1) can be limited because of its relatively high solubility in soil. 相似文献
72.
Seifi HA Dalir-Naghadeh B Farzaneh N Mohri M Gorji-Dooz M 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2007,54(2):92-97
The purpose of the study was to evaluate the effect of retained fetal membranes (RFM) on serum minerals and energy- and protein-related metabolites in dairy cows at a herd with a recent history of fatty liver syndrome. Forty-seven multiparous Holstein cows were selected during transition period. Nine cows had RFM longer than 24 h after calving. Blood samples were obtained on prepartum days 21 and 7 and postpartum days 7 and 21. We used repeated measure procedure of anova to evaluate the effect of RFM on serum metabolites. Cows with RFM had significantly higher concentrations of beta-hydroxybutyrate, non-esterified fatty acids and triglycerides after calving, but had lower concentrations of cholesterol during transition period. The concentrations of serum albumin and blood urea nitrogen were also significantly lower in RFM-affected cows than non-affected ones after parturition. Our results suggested that negative energy balance (NEB) postpartum was associated with RFM in dairy cattle. However, our findings did not reveal a cause and effect relationship with respect to the role of NEB as a possible risk factor for RFM. 相似文献
73.
74.
Farzaneh?RazaviEmail author Ellen?De?Keyser Jan?De?Riek Marie?Christine?Van?Labeke 《Euphytica》2011,180(3):385-409
Drought stress is one of the most important environmental factors that limit plant growth and development, thus reducing yield.
The objective of the present research was to correlate the genetic structure of different Fragaria genotypes, as assessed by Expressed Sequence Tag (EST) and Amplified Fragment Length Polymorphism (AFLP) markers, and plant
responses to drought stress. Firstly, physiological parameters related to the plant response to drought stress such as leaf
relative water content (RWC) and water losing rate (WLR) were measured. WLR and RWC were compared for 20 cultivars of the
octaploid Fragaria × ananassa, two ecotypes of the diploid species F. vesca and one octaploid species F.
chiloensis. These parameters could discriminate genotypes showing a contrasting response to water stress. Secondly, AFLP and ESTs were
compared in terms of their information content and efficiency in the study of genetic diversity and relationships among these
23 Fragaria genotypes. To evaluate the genetic basis for the observed variation in the measured physiological parameter, the effect of
specific AFLP/EST loci on WLR and RWC for the different Fragaria genotypes was quantified by Kruskal–Wallis analysis. By Mantel testing, the hierarchical clustering of the Fragaria genotypes based on associated EST or AFLP markers was compared to the observed eco-physiological relevant grouping. A better
discriminating capacity for associated markers was noted, enabling a functional marker selection approach to screen the strawberry
gene pool for drought tolerance. Correlation of EST markers to leaf RWC and WLR enforces them as potential candidate genes
in control of plant responses to drought stress in Fragaria sp. 相似文献
75.
The effects of interaction between cadmium chloride (CdCl2) and iron (Fe)- ethylenediaminetetraacetic acid (EDTA) were studied in rice plant. The seedlings of rice were treated with 0, 50, and 100 μM CdCl2 supplemented with 5, 10 and 20 ppm Fe as Fe-EDTA for 30 days. Plants were grown under controlled condition. In all the plants treated with CdCl2, growth parameters [relative leaf growth rate (RLGR), specific leaf area (SLA), and leaf water content area (LWCA)], soluble, and unsoluble sugars contents decreased. Addition of Fe-EDTA moderated cadmium effects. Under CdCl2 stress without Fe, malondialdehyde (MDA) content, proline content, catalase (CAT) and peroxidase (POD) activity increased, however, in solutions containing both CdCl2 and Fe-EDTA, MDA content, proline content and activities of antioxidant enzymes decreased. In 50 μM CdCl2, total protein content increased but in 100 μM decreased. With increasing Fe in solutions containing CdCl2, protein content decreased. The results indicated that with increasing Fe-EDTA in CdCl2 treated plants, the effects of toxicity of Cd decreased. 相似文献
76.
Farzaneh Rouhollahi Seyed Abdolkarim Hosseini Farzaneh Alihosseini Alireza Allafchian Fatemeh Haghighat 《Fibers and Polymers》2018,19(10):2056-2065
Polyglycolic acid-poly lactic glycolic acid (PGA-PLGA) electrospun nanofibers containing silver nanoparticles have been produced and twisted into the nanofibrous yarn. The morphology of nanofibers and produced yarns, as well as the mechanical properties of the yarns, were investigated. Furthermore, in vitro antibacterial properties and in vitro degradation behavior of yarns containing various silver nanoparticles were studied. SEM images confirmed that the addition of the silver nanoparticles into the polymer solution increases the fiber diameters. The result of the mechanical test of the yarns alone and used in two different forms of the knots was measured and results showed that the strength of the yarns without the knot was significantly more than that of others. The biodegradability test showed that the mechanical properties and the weight of the yarns were quickly reduced after subjecting to in vitro condition. The result of the antibacterial test indicated that the nanofiber yarns containing %3 silver nanoparticles were the most appropriate sample with a considerably antibacterial activity against both gram-positive bacterium Staphylococcus aureus and gram-negative bacterium Escherichia Coli with inhibition zones of 8.1 and 9.5 mm, respectively; which demonstrated that silver nanoparticles retained their effectiveness after the electrospinning process. Therefore the nanofibrous yarns containing silver nanoparticles could be successfully produced by the electrospinning process with the proper antibacterial property as a candidate for the surgical sutures. 相似文献
77.
Fatemeh Aghakeshmiri Mohammad Azizzadeh Nima Farzaneh Morteza Gorjidooz 《Veterinary research communications》2017,41(2):107-112
Diarrhea is one of the most frequent diseases of neonatal calves in dairy herds. The aim of this study was to evaluate the effects of neonatal diarrhea and other conditions on subsequent first lactation milk production and reproductive performance of heifer calves up to the first calving. Seven hundred heifer calves (350 with and 350 without the history of diarrhea in first month of life) were monitored from birth until a year after calving. For each heifer, birth season, birth weight, ease of birth and occurrence of diseases from birth to the end of first lactation were recorded as independent variables. Interval from birth to first service, interval from birth to conception, interval from birth to first calving and 305-days milk yield in the first lactation were recorded as dependent variables. Effects of explanatory variables on productive and reproductive indices were evaluated by survival analysis and general linear model. Heifers with the history of diarrhea during the first month of their lives showed lower daily hazard of conception [Hazard ratio: 0.85 (95%CI: 0.73–0.99)] and calving [Hazard ratio: 0.84 (95%CI: 0.72–0.98)] than those of healthy heifers. Subsequent reproductive performance of heifer calves was also associated with birth season and ease of birth. Further, heifer calves born with birth weight of below 35 kg produced an average of 518 and 506 l less milk in their first lactation compared to calves with a birth weight 40–45 (p = 0.013) and greater than 45 kg (P = 0.033), respectively. These findings showed that occurrence of neonatal diarrhea and other neonatal parameters are associated with harmful effects on subsequent production and reproductive performance. 相似文献
78.
Eurasian Soil Science - A litho-toposequence of soils in a semi-arid region in southwestern Iran was investigated for their pedological properties. Nine representative pedons on different... 相似文献
79.
Mohammadi Azadeh Niazi Ali Aram Farzaneh Hassani Farshid Ghasemi Younes 《Journal of Crop Science and Biotechnology》2020,23(1):81-88
Journal of Crop Science and Biotechnology - Nowadays, transgenic plants are considered as an expression system for therapeutic recombinant proteins. One of the approaches to recombinant protein... 相似文献
80.
Mehdi Zolfaghari Mohammad Reza Imanpour Esfandyar Najafi 《Aquaculture Research》2011,42(11):1594-1599
The effects of photoperiod (12L:12D and 18L:6D) and feeding frequency (three, four and five evenly spaced daily feedings) of 10% biomass per day during light hours on growth and stress response of Persian sturgeon (Acipenser persicus) fingerlings were evaluated. The interaction between photoperiod and feeding frequency was not significant (P>0.05). Faster growth was observed in fish exposed to an 18L:6D photoperiod (P<0.01). The feed conversion efficiency (FCE) was also better with an 18L:6D photoperiod (P<0.05). Fish fed four and five meals per day grew similarly (P>0.05) and faster than when fed only three meals (P<0.01). The FCE with four or five meals per day was better than with three meals (P<0.05). At harvest, the proximate composition was similar in all treatments (P>0.05). Stress indicators (cortisol, glucose and haematocrit) did not differ between photoperiods (P<0.05). The results showed that 0.9–8.0 g Persian sturgeon fingerlings should be reared with an 18L:6D photoperiod and fed four times per day to obtain good growth and FCE. 相似文献