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51.
防制霉菌毒素的实用方法 总被引:1,自引:0,他引:1
尽管在谷物的生长、收割和储藏期间实施了减少霉菌毒素形成的农艺措施,但饲料污染的情况依然显著。因此,防止霉菌毒素的形成,是控制饲料原料受霉菌毒素污染最明智和最经济的方法。由于人们对食品和动物饲料受霉菌毒素污染问题的日益关注,科研人员进行了广泛研究,以阐明能够影响 相似文献
52.
Roushangar Kiyoumars Khowr Ali Foroudi saniei Mojtaba Alizadeh Farhad 《Paddy and Water Environment》2020,18(2):355-366
Paddy and Water Environment - Due to their economical and structural aspects, ogee-crested spillways can be constructed and operated in a wide variety of situations. In this study, a... 相似文献
53.
Talei Daryush Nekouei Mojtaba Khayam Mardi Mohsen Kadkhodaei Saeid 《Journal of Crop Science and Biotechnology》2020,23(4):301-309
Journal of Crop Science and Biotechnology - The polyploidy induction using mutagenic chemicals is one of the breeding approaches to improve enhancing productivity of yield and secondary metabolites... 相似文献
54.
Adel Jalili Younes Asri Shahbaz Yazdani Fatemeh Zarrinkamar Reza Safavi John G Hodgson Ken Thompson Mojtaba Pakparvar 《Biological conservation》2003,109(3):425-431
The Arasbaran Protected Area is an important but little studied nature reserve in NW Iran. In the past habitat heterogeneity and biodiversity have been threatened by over-exploitation; in the future depopulation may lead to partial abandonment. The soil seed bank was examined to see whether there are sufficient species represented as persistent seeds to reconstitute the vegetation in the event of habitat deterioration. There were differences between seed banks from different soils and vegetation types but essentially all soil seed banks contained few species and low densities of seed. Moreover, the species in the seed bank were unrepresentative of the vegetation. During future periods of changing land use it will be important to maintain the existing vegetation. There are however indications of successful recent conservation management. Annuals are abundant in the woodland seed bank but absent from the vegetation. The forest is recovering from the disturbance of collecting fire-wood. 相似文献
55.
在过去20年中,家禽行业取得了迅猛的发展,这一发展很可能是该行业各个生产部门(如养殖场、孵化场、屠宰加工厂和饲料厂)员工长期不断奉献的结果。这些员工每天处于职业和环境引起的健康危害之中,主要的健康危害因素包括接触气源性病菌、受伤以及感染人畜共患传染病。养殖场员工,特别是未经培训的新员工,通常处于较高的健康风险之中。此外,那些生活在家禽养殖场、孵化场、屠宰加工厂附近居民可能也会通过空气、水和土壤接触这些健康危害因素。 相似文献
56.
预防疾病决不只是进行疫苗接种,而是一项复杂得多的工作。鸡群未得到充分保护时,疫苗常常成为被责怪的对象,但事实上免疫失败常常是由其它因素造成的。 相似文献
57.
Comparative effect of Freund's adjuvant and Aloe vera L. gel on the expression of TNF‐α and IL‐1β in vaccinated Cyprinus carpio L. with Aeromonas hydrophila C. bacterin 下载免费PDF全文
Esmail Abdy Mojtaba Alishahi Mohammad Reza Tabandeh Masoud Ghorbanpoor Hadis Jafari 《Aquaculture Research》2016,47(8):2543-2552
The comparative effects of Freund's and Aloe vera gel as adjuvants on the expression of IL‐1β and TNF‐α genes were studied in vaccinated common carp (Cyprinus carpio) with Aeromonas hydrophila bacterin. Fishes were intraperitoneally immunized with A. hydrophila bacterin in combination with Aloe vera gel or Freund's and also without any adjuvant. At day 28 after immunization, all groups were challenged by lethal dose of A. hydrophila (107 cells/fish). Changes in the expression of IL‐1β and TNF‐α genes were evaluated in anterior kidney before challenge and 12, 24, 72 and 7 days postchallenge using quantitative real‐time PCR. Higher expression levels of both genes were observed in all vaccinated groups compared with non‐immunized group. Fishes which received Aloe vera gel showed higher expression of IL‐1β and TNF‐α in relation to animals which vaccinated with or without Freund's adjuvant. We concluded that Aloe vera gel in compared with Freund's adjuvant had a more stimulatory effect on the expression of immune‐related genes in vaccinated common carp and it can use as a novel adjuvant in aquaculture. 相似文献
58.
SayedHamid Matinkhah Marzieh Taabe Mohammadreza Raoofi S. Mojtaba Matinkhah 《Arid Land Research and Management》2016,30(3):304-319
The success of plantation, establishment, and growth of trees and shrubs is an important concern in afforestation efforts. There have been extensive efforts to use Haloxylon ammodendron in many desert areas throughout the world in desert combating projects, but these efforts have not always been successful, despite high costs. In this study, we propose a new application of fuzzy decision-making method for selecting suitable sites for the growth of this species. We determine, based on available autecological studies, the most effective factors in desert habitats, and a fuzzy membership function is designed for each of the factors. A suitability index is constructed by unifying the fuzzified factors. This model is then applied to an actual plantation area to evaluate the suitability of different parts of this trial area. Finally, the predicted results are compared to the actual rate of success, based on the canopy cover percentage. The coefficient of determination for the observed canopy cover percentage plotted against the predicted suitability values is higher than 98%, which demonstrates that the presented fuzzy decision-making approach is potentially a powerful tool in site selection for this and, probably, other species. 相似文献
59.
Seyed Vali Hosseini Abdolmohammad Abedian Kenari Masoud Rezaei Rajab Mohammad Nazari Mojtaba Mohseni Xesus Feas Sanchez 《Journal Of Aquatic Food Product Technology》2013,22(4):394-408
The main aim of the present work was to evaluate the effect of dietary butylated-hydroxytoulene (BHT as an antioxidant) and dietary lipid level on flesh lipid quality of Beluga sturgeon during frozen storage. An initial 135-day feeding trial evaluated practical-type diets containing 0 or 250 mg BHT kg?1 with two lipid levels (12 and 24% diet on dry matter basis) in a factorial arrangement. Fillet samples were analyzed fresh or after storage at ?18 ± 1°C for 12 months. Dietary antioxidant supplementation had no significant effect on fat content and fatty acid composition in the studied fish muscle, but increasing the lipid concentration in the feed increased muscle lipid concentration. Lipid oxidation in fish muscle is related to increasing lipid concentration in the feed. In addition, oxidation was reduced for fish fed BHT. Results showed that dietary BHT supplementation can slow down the level of lipid oxidation in Beluga sturgeon muscles during frozen storage, but it had a direct relationship with dietary lipid level. 相似文献
60.
Maryam Akbari Hessam Jafari Mojtaba Rostami Gholam Reza Mahdavinia Ali Sobhani nasab Dmitry Tsurkan Iaroslav Petrenko Mohammad Reza Ganjali Mehdi Rahimi-Nasrabadi Hermann Ehrlich 《Marine drugs》2021,19(9)
The renewable, proteinaceous, marine biopolymer spongin is yet the focus of modern research. The preparation of a magnetic three-dimensional (3D) spongin scaffold with nano-sized Fe3O4 cores is reported here for the first time. The formation of this magnetic spongin–Fe3O4 composite was characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA) (TGA-DTA), vibrating sample magnetometer (VSM), Fourier-transform infrared spectroscopy (FTIR), and zeta potential analyses. Field emission scanning electron microscopy (FE-SEM) confirmed the formation of well-dispersed spherical nanoparticles tightly bound to the spongin scaffold. The magnetic spongin–Fe3O4 composite showed significant removal efficiency for two cationic dyes (i.e., crystal violet (CV) and methylene blue (MB)). Adsorption experiments revealed that the prepared material is a fast, high-capacity (77 mg/g), yet selective adsorbent for MB. This behavior was attributed to the creation of strong electrostatic interactions between the spongin–Fe3O4 and MB or CV, which was reflected by adsorption mechanism evaluations. The adsorption of MB and CV was found to be a function of pH, with maximum removal performance being observed over a wide pH range (pH = 5.5–11). In this work, we combined Fe3O4 nanoparticles and spongin scaffold properties into one unique composite, named magnetic spongin scaffold, in our attempt to create a sustainable absorbent for organic wastewater treatment. The appropriative mechanism of adsorption of the cationic dyes on a magnetic 3D spongin scaffold is proposed. Removal of organic dyes and other contaminants is essential to ensure healthy water and prevent various diseases. On the other hand, in many cases, dyes are used as models to demonstrate the adsorption properties of nanostructures. Due to the good absorption properties of magnetic spongin, it can be proposed as a green and uncomplicated adsorbent for the removal of different organic contaminants and, furthermore, as a carrier in drug delivery applications. 相似文献