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Gonbad-e Qābūs, Iran

Seyfzadeh M.,Iranian Fisheries National Fish Processing Center | Motalebi A.A.,Iranian Fisheries Research Organization | Kakoolaki S.,Iranian Fisheries Research Organization | Gholipour H.,Gonbad University
Iranian Journal of Fisheries Sciences

The effects of whey protein (12%) and sodium alginate (0.5%) on chemical, microbial and sensory changes and shelf life in kilka during frozen storage are investigated for up to 6 months. Total bacteria count and Staphylococcus bacteria counts(2 / 51 and 1 / 44 log CFU/g) in coated samples showed decrease in comparison with control samples(3.21- 2.28 log CFU/g). Moisture of coated samples had significant increase than control treatment (p<0.05). protein, lipid, ash and calorie were higher in test samples as compared with the control samples. Free fatty acids, TBRS, peroxide value, TVN and pH in coated samples showed significant decrease in comparison with control (p<0.05). Sensory evaluation of coated samples showed significant difference in comparison with control (p<0.05). It is suggested that whey protein edible coating incorporated with sodium alginate can enhance quality and increase shelf life of kilka fish in storage of freezing up to 6 months. Source

Kordnaeij A.,Imam Khomeini International University | Kalantary F.,K. N. Toosi University of Technology | Kordtabar B.,National Iranian Oil Company | Mola-Abasi H.,Gonbad University
Soils and Foundations

Settlement based design for shallow foundations realizing the consolidation aspect is a major challenge in geotechnical engineering. The recompression index (Cr) from the oedometer test is used to estimate the consolidation settlement of over-consolidated (OC) clays. Since the determination of Cr from oedometer tests is relatively time-consuming and is usually determined for a single unloading, empirical equations based on index properties can be useful for settlement estimation. Correlations have been proposed to relate the Cr of clay deposits to other soil parameters. Since existing equations are incapable of estimating Cr well, artificial intelligence methods are used to predict them. In the present study, a Group Method of Data Handling (GMDH) type neural network is used to estimate the Cr from more simply determined index properties such as the liquid limit (LL) and initial void ratio (e0) as well as specific gravity (Gs). In order to assess the merits of the proposed approach, a database containing 344 data sets has been compiled from case histories via geotechnical investigation sites in the province of Mazandaran, along the southern shoreline of the Caspian Sea, Iran. In addition to the physical properties mentioned already, the natural water content (ωn), plastic index (PI) and dry density (γd) were also included in the model development. A comparison was carried out between the experimentally measured recompression indexes and the predictions in order to evaluate the performance of the GMDH neural network method. The results demonstrate that an improvement with respect to the other correlations has been achieved. Finally, a sensitivity analysis of the obtained model was performed to study the influence of the input parameters on the model output. The sensitivity analysis reveals that e0 and LL have significant influence on predicting Cr. & 2015 The Japanese Geotechnical Society. Production and hosting by Elsevier B.V. All rights reserved. Source

Raei F.,Shahid Beheshti University | Ghorbani Nohooji M.,Institute of Medicinal Plants | Habibi M.,Gonbad University | Ashoori N.,Shahid Beheshti University
Journal of Medicinal Plants

Background: Despite the discovery of numerous antibiotics, drug resistance still remains as a major problem. Therefore, it is important to introduce and replace new sources of drug such as medicinal plants with antimicrobial properties. Objective: The genus Clematis (Ranunculaceae family) has six species in Iran. Aerial parts of Clematis have been used to cure fever and chronic diseases such as Rheumatism in traditional medicine. In this research, antibacterial activity of ethanolic and methanolic extracts of aerial part in two major species of the genus in Iran (contains C. orientalis and C. ispahanica) were studied. Methods: Aerial plant parts were dried in shade, powderized and then ethanolic and methanolic extracts were prepared. Antibacterial activity of the two extracts was measured against six laboratory standard strains including gram positive and gram negative bacteria by disc diffusion. Minimum inhibitory concentrations were also determined using broth microdilution. Results: Results showed that antibacterial activity of methanolic extracts is stronger than the ethanolic one. Also, C. ispahanica has stronger antibacterial activity in comparison to C. orientalis. Gram positive test bacteria showed the most susceptibility to both extracts compared to gram negative organisms. Conclusion: According to antibacterial effects of alcoholic extracts, it seems necessary to diagnose effective antibacterial components to compare results with existed finding and introduce a new trapeutic source. Source

Bagheri T.,Islamic Azad University at Gorgan | Bagheri T.,Gonbad University | Imanpoor M.R.,Gorgan University of Agricultural Sciences and Natural Resources | Jafari V.,Gorgan University of Agricultural Sciences and Natural Resources | Bennetau-Pelissero C.,ENITA de Bordeaux
Animal Reproduction Science

A long-term feeding experiment was conducted to investigate the inclusion of soybean meal in diets for goldfish (Carassius auratus) on fish reproduction. In the present study, 20 weeks after hatching, goldfish with an initial average weight of 2±0.03g (mean±SD) were divided into 12 groups (three tanks per dietary treatment) and fed 400gkg-1 crude protein diets. The four experimental diets were as follows: diet 1, fish meal (FM); diet 2, 35% soybean meal (SBM35%); diet 3, 65% soybean meal (SBM65%); diet 4, 100% soybean meal (SBM100%). After feeding with experimental diets, the impact on reproduction was investigated. In both males and females, the plasma testosterone (T) was significantly decreased, while 17β-estradiol (E2) levels were significantly increased. Levels of 17α, hydroxyprogesterone. (17-OH-P) did not differ as a result of soybean meal feeding in either males or females. The average number of eggs spawned and sperm quality were reduced on feeding with soybean inclusion. Histological examination showed impact on oocyte maturation progress and spermatogenesis process in female and male fish, respectively. In addition, feeding goldfish with soybean meal until maturation caused reduction in fertilization and hatching rates in parallel to increasing soybean meal inclusion. The results demonstrated that inclusion of soybean meal might cause sex hormone biosynthesis disruption and reproductive impairments in fish, ultimately decreased fertilization as well as hatching rates in the offspring. © 2013 Elsevier B.V. Source

Yousefzadeh H.,Tarbiat Modares University | Yousefzadeh H.,University of Mazandaran | Hosseinzadeh Colagar A.,University of Mazandaran | Tabari M.,Tarbiat Modares University | And 2 more authors.
Plant Systematics and Evolution

Nucleotide sequences from the internal transcribed spacers (ITS) of nuclear ribosomal DNA and 5.8S gene were used to infer the phylogeny of Tilia species (represented by 13 distinct populations) growing in different geographical areas of Hyrcanian forests in northern Iran. Four well-supported lineages were revealed, including that of a new species, T. hyrcana, with stellate trichomes on both sides of the leaves and petiole. T. hyrcana is a well-supported cladospecies, with the ITS sequence and secondary structure following the diagnosable phylogenetic species concept, and is also characterized by a distinct morphology. A controversial species is Tilia rubra subsp. caucasica, with three different forms-an assemblage of taxa characterized by a lack of stellate trichomes on leaves-while Tilia begonifolia is distinguished by stellate trichomes on the underside of both leaves and petiole. The fourth lineage group, T. dastyla, is characterized by the presence of trichomes on the style. A single taxon found in the west of the Hyrcanian forest region is similar to T. begonifolia, but due to the former being located in a distinct group, a reassessment of the diagnostic morphology is recommended. ITS sequence data also suggested a closer relationship between T. rubra and T. begonifolia. Compensatory base change analysis was not strong enough to separate individual species within the Tilia genus. In general, the study supports the utility of ITS sequence data and secondary structure as accessory taxonomic characteristics with which to help clarify the systematics of the Tilia genus. © 2012 Springer-Verlag. Source

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