Growth performance,intestinal histology,and biochemical parameters of rainbow trout (<Emphasis Type="Italic">Oncorhynchus mykiss</Emphasis>) in response to dietary inclusion of heat-killed <Emphasis Type="Italic">Gordonia bronchialis</Emphasis>     

Sadigheh Shabanzadeh  Maryam Shapoori  Najmeh Sheikhzadeh  Katayoon Nofouzi  Ali Khani Oushani  Mohammad Hamed Najafi Enferadi  Karim Mardani  Amir Ali Shahbazfar 《Fish physiology and biochemistry》2016,42(1):65-71

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Incorporation of surface modified graphene nanoplatelets for development of shape memory PLA nanocomposite     

Mohsen Keramati  Ismaeil Ghasemi  Mohammad Karrabi  Hamed Azizi  Mohammad Sabzi 《Fibers and Polymers》2016,17(7):1062-1068

In this study, a temperature sensitive shape memory polymer (SMP) system based on polylactic acid (PLA) has been developed and the effect of graphene nanoplatelets (GNPs) on the shape memory properties was evaluated. Dispersion of GNPs in PLA was improved with the aid of a zwitterionic surfactant. X-ray diffraction (XRD) and transmission electron microscopy (TEM) showed that the surface modified graphene nanoplatelets (SMGNPs) were exfoliated and homogenously dispersed in the PLA matrix due to enhancement of the polymer-graphene interaction. Mechanical properties of the samples namely stiffness and elasticity were increased upon incorporation of graphene nanoplatelets accompanied by their good dispersion in the PLA matrix. Furthermore, differential scanning calorimetry (DSC) revealed that the nucleation effect of graphene promote the crystallization and noticeably enhanced the degree of crystallinity. Finally, prominent mechanical properties along with high degree of crystallization due to fine dispersion of surface modified graphenes, resulted in drastic improvement in shape memory performance.  相似文献   

Influence of Diazotrophic Bacteria on Antioxidant Enzymes and Some Biochemical Characteristics of Soybean Subjected to Water Stress     

Hamed Zakikhani  Mohammad Reza Ardakani  Farhad Rejali  Majid Gholamhoseini  Aydin Khodaei Joghan  Aria Dolatabadian 《中国农业科学(英文版)》2012,11(11):1828-1835

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Effect of salt stress on germination and seedling growth of Prosopis juliflora (Sw.)     

Seyed Mohammad Hosseini Nasr  Aidin Parsakhoo  Hamed Naghavi  Sekineh Kiani Savad Koohi 《New Forests》2012,43(1):45-55

The present study was conducted to evaluate the effect of different concentrations of salts on seed germination and seedling growth of Prosopis juliflora. The experiment was carried out in Forestry Laboratory at Sari Agricultural Sciences and Natural Resources University, Iran. The collected seeds were treated with boiling water and H₂SO₄ then left to germinate in controlled growth chamber. Seed were grown under salinity levels 100, 200 and 300 mM of CaCl₂, NaH₂PO₄, KNO₃ and KH₂PO₄. Germination parameters and various seedling growth variables such as root and stem length, seedlings fresh and dry weight were measured after 56 days. Results showed that germination percentage significantly decreased as the salinity level of medium increased. Salinity treatments at 100 mM enhanced the percentage of seeds germination and significantly improved the germination index and seeds stamina. In this study, the best treatment was 100 mM salinity for biomass production of seedlings. For Prosopis juliflora, 100 mM salinity significantly enhanced both germination and biomass production.  相似文献   

Molecular approach to determine taxonomic status of <Emphasis Type="Italic">Septoria</Emphasis> sp. causing leaf blotch of <Emphasis Type="Italic">Castanea sativa</Emphasis> in Hyrcanian forests     

Hamed Yousefzadeh  Abbas Saidi  Somayeh Tayebi  Davoud Kartoolinejad  Reza Naghdi 《林业研究》2017,28(4):661-670

Castanea sativa is a valuable tree species in Hyrcanian forests, an evolutionary relict ecosystem whose communities suffer from overexploitation and fungal diseases. In the current study, three species delimitation methods were utilized with ITS regions sequencing to determine the taxonomic status of Septoria causing leaf blotch of C. sativa in Hyrcanian forests. The results indicated that the length of ITS region in the genus Septoria (extracted from GenBank) varied from 650 to 680 bp. There were almost three times more variable sites in ITS1 than in ITS2. The ITS2 secondary structure of Hyrcanian Septoria community had the highest similarity with Septoria castaneicola, except for some differences in helix II and III. Also, Hyrcanian samples had minimum genetic distances with S. castaneicola and maximum with Septoria quercicola. The maximum parsimony method divided the studied Septoria genus into three distinct clades, mostly located in clade I. Clade II consisted entirely of Septoria aciculosa, while clade III contained S. castaneicola as well as Hyrcanian samples.  相似文献   

Evaluating the Mechanical Behavior of Basalt Fibers/Epoxy Composites Containing Surface-modified CaCO<Subscript>3</Subscript> Nanoparticles     

Arezoo Abdi  Reza Eslami-Farsani  Hamed Khosravi 《Fibers and Polymers》2018,19(3):635-640

Polymer matrix composites (PMCs) owing to their outstanding properties such as high strength, low weight, high thermal stability and chemical resistance are broadly utilized in various industries. In the present work, the influence of silanized CaCO₃ (S-CaCO₃) with 3-aminopropyltrimethoxysilane (3-APTMS) coupling agent at different values (0, 1, 3 and 5 wt.% with respect to the matrix) on the mechanical behavior of basalt fibers (BF)/epoxy composites was examined. BF-reinforced composites were fabricated via hand lay-up technique. Experimental results from three-point bending and tensile tests showed that with the dispersion of 3 wt.% S-CaCO₃, flexural strength, flexural modulus, tensile strength and tensile modulus enhanced by 28 %, 35 %, 20 % and 30 %, respectively. Microscopic examinations revealed that the development of the mechanical properties of fibrous composites with the incorporation of modified CaCO₃ was related to enhancement in the load transfer between the nanocomposite matrix and BF as well as enhanced mechanical properties of the matrix part.  相似文献   

A study of the molluscicidal and larvicidal activities of Citrullus colocynthis (L.) leaf extract and its main cucurbitacins against the mollusc Galba truncatula,intermediate host of Fasciola hepatica          下载免费PDF全文

Rachid Chawech  Fatma Njeh  Nejia Hamed  Mohamed Damak  Ali Ayadi  Hayet Hammami  Raoudha Mezghani‐Jarraya 《Pest management science》2017,73(7):1473-1477

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Phylogenetic relationship and genetic differentiation of Populus caspica and Populus alba using cpDNA and ITS noncoding sequences     

Hamed Yousefzadeh  Abasalt Hosseinzadeh Colagar  Effat Yousefi  Maryam Badbar  Gregor Kozlowski 《林业研究》2019,(2):451-461

Populus caspica Bornm.(section Leuce and subsection Albida), one of the most endangered endemic tree species in the Hyrcanian Forest in Iran, has numerous morphological characteristics that are closely similar to Populus alba; to clarify their taxonomic relatedness and genetic differentiation and thus inform conservation strategies, we used the noncoding regions of chloroplast DNA(cpDNA; trnL-F and trnH-psbA) and the internal transcribed spacer(ITS). Leaf samples were collected from six populations across northern Iran. cpDNA and ITS fragments were amplified by universal primers using the PCR technique and directed sequencing. The results showed that P. caspica is genetically differentiated from P.alba, and two ITS variants were detected within some P.caspica individuals. Conflicts between topologies from ITS and plastid genomes were observed. High differentiation of P. caspica from the other Populus species shown in this study confirmed the diverging taxonomic status of this endangered species. We recommend in situ conservation measures(e.g., protected areas) for at least several populations of this species, especially in the plain regions of the Hyrcanian forest.  相似文献   

Leptospirosis in Egyptian rodents     

M S Tawfik  O M Hamed  R El-Karamani 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1977,24(9):728-732

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Erratum to: Cellulose acetate from biomass waste of olive industry     

Othman A. Hamed  Shehdeh Jodeh  Nisreen Al-Hajj  Emad M. Hamed  Ahmed Abo-Obeid  Yusra Fouad 《Journal of Wood Science》2015,61(3):334-334

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