Prevalence of anti-<Emphasis Type="Italic">Toxoplasma gondii</Emphasis> antibodies in sport horses from Qazvin,Iran     

Elham Hajialilo  Naser Ziaali  Majid Fasihi Harandi  Mehrzad Saraei  Mohammad Hajialilo 《Tropical animal health and production》2010,42(7):1321-1322

In the present study, the prevalence of antibodies to Toxoplasma gondii in sport horses of Qazvin was examined using modified agglutination test (MAT). On 52 horse sera totally examined for anti-Toxoplasma antibodies, 37 horses (71.2%) were seropositive by MAT. Results of the present study showed a high rate of Toxoplasma infection in horses in Qazvin area. More comprehensive study on equine toxoplasmosis is recommended.  相似文献   

The first serologic study of Q fever in sheep in Iran     

Sakhaee  Ehsanollah  Khalili  Mohammad 《Tropical animal health and production》2010,42(7):1561-1564

Coxiella burnetii is an obligate intracellular microorganism that causes Q fever in humans and animals. In ewes, C. burnetii infections are generally asymptomatic, but they can lead to abortions, stillbirths, and delivery of weak and unviable lambs. Serological assays are suitable for screening herds. Enzyme-linked immunosorbent assays (ELISA) technique has a high sensitivity and a good specificity. The aim of this study was to investigate the presence of anti-C. burnetii antibodies among sheep in southeast Iran. A total of 85 serum samples were collected from ten sheep flocks from April to September 2009. Serum samples were tested for Q fever antibodies using a commercial indirect ELISA kit. Antibodies were detected in 25 sera (29.42%) of 85 samples. Sixteen female (18.82%) and nine male (10.58%) cases had antibodies specific to C. burnetii. There is significant difference in seropositivity between male and female groups (P < 0.05). This first study of C. burnetii seroprevalence in sheep in southeast Iran has indicated that seropositive animals can be found throughout the country. Further work is now required to characterize the epidemiology of the infection more thoroughly.  相似文献   

Transcriptome and proteome profiling of host responses to Marek's disease virus in chickens     

Haq K  Brisbin JT  Thanthrige-Don N  Heidari M  Sharif S 《Veterinary immunology and immunopathology》2010,138(4):292-302

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Wood-wool cement board using mixture of eucalypt and poplar     

Alireza Ashori  Taghi TabarsaKhadijeh Azizi  Reza Mirzabeygi 《Industrial Crops and Products》2011,34(1):1146-1149

This study was carried out to explore the possibility of making cement-bonded wood-wool composite building products using eucalypt (Eucalyptus camaldulensis) and poplar (Populus deltoides). The experimental design consisted of three treatments - ratio of wood-wool mixture, percentage concentration of cement, and calcium chloride (CaCl₂). The mechanical properties in terms of modulus of rupture (MOR), modulus of elasticity (MOE) and internal bond (IB) strength were investigated. The ratios of wood-wool to cement were 40:60 and 60:40 by weight. The addition of the woody material to cement clearly reduced the maximum hydration temperature and increased the time to maximum temperature. Eucalypt was generally less compatible with cement than poplar wood. Test results showed that boards made with poplar wood-wools had superior properties compared to the eucalypt and mixed wood-wools. The presence of eucalypt in mixture of woody materials typically resulted in decrease in mechanical properties. It has been noted that a dose of 5% of CaCl₂ by weight of cement can enhance the effect of cement. Application of Duncan's Multiple Range Test for the mean values of the results showed that the effects of all variables and their interactions on the mechanical properties in terms of MOR, MOE and IB were highly significant (p ≤ 0.01%). The mechanical properties of most produced boards were found to satisfy the minimum requirements of ISO standard.  相似文献   

Simultaneous application of silver nanoparticles with different crease resistant finishes     

Akbar Khoddami  Shima S. Shokohi  Mohammad Morshed  Dariush Abedi 《Fibers and Polymers》2011,12(5):635-641

Textiles, especially those made of natural fibers, are suitable medium for the growth of microorganisms which causes disease transmission, stink, colorful spots, and reduction in fabric strength. This research focuses on the antimicrobial finishing of cotton fabrics using colloidal solution of silver nanoparticles. Due to the difficulties of adding a new step to the finishing process of cotton textiles, efforts have been made to combine the antimicrobial treatment with the conventional finishing processes. For this purpose two chemical finishes of Fixapret ECO as a crosslinking agent and Cellofix ME as a resin former have been used in anti crease finishing of cotton fabric and their effects were evaluated. The properties of the samples have been investigated by measuring the resistant of samples against bacteria, crease recovery angle, abrasion, and washing fastness. The results showed that treated samples by pad-dry method have the best antibacterial effect with a direct relation between the increase in drying temperature and antibacterial properties. However, the washing and abrasion fastness were not at the acceptable level. Co-application of the colloidal solution of silver nanoparticles with the crease resistant materials improved both fastness properties while at the same time limited the direct contact between the nanoparticles and the bacteria so the antibacterial efficiency was reduced. Subsequently, it was concluded that the antibacterial finishing method should be selected according to the end uses. In addition, antibacterial treatment could be one of the multi-purpose finishes for cotton fabric.  相似文献   

Physical land suitability evaluation for specific cereal crops using GIS at Mashhad Plain, Northeast of Iran     

Ali Bagherzadeh  Mohammad Reza Mansouri Daneshvar 《Frontiers of Agriculture in China》2011,5(4):504-513

Land evaluation is the process of predicting land use potential on the basis of its attributes. In the present study, the physical land suitability evaluation approach was investigated for specific cereal crops including irrigated wheat, barley, grain maize and sorghum, based on FAO land evaluation frameworks (FAO, 1976, 1983, 1985) and the proposed method by Sys et al. (1991) at Mashhad Plain, Northeast Iran. Twenty eight soil profiles were studied on seven land units by a precise soil survey and their morphological and physicochemical properties were determined. Climatic and land qualities/characteristics of four cereal crops were determined using the tables of crop requirements developed by Sys et al. (1993). An interpolation function was used to map values to scores in terms of land qualities/characteristics for land utilization types and the evaluation was carried out according to parametric approaches. The interpolation technique using GIS functions helped in managing the spatial data and visualizing the results. Our results indicated that the most important limiting factors for irrigated wheat and barley cultivations are soil physical and fertility/chemical properties, while the production of irrigated grain maize and sorghum is mainly limited by climatic conditions at Mashhad Plain. It was shown that all land units suitable for irrigated wheat cultivation overlap with that of barley, whereas the same limiting factors resulted in the overlapping of the irrigated grain maize production area with that of sorghum. The results of the physical land suitability evaluation for specific cereal crops indicated the priority of irrigated barley and wheat cultivations over irrigated grain maize and sorghum at the study area.  相似文献   

The influence of the El Niño Southern Oscillation on paralarval market squid (Doryteuthis opalescens)          下载免费PDF全文

Charles T. Perretti  Mohammad Sedarat 《Fisheries Oceanography》2016,25(5):491-499

California market squid (Doryteuthis opalescens) support one of the largest and most valuable fisheries in California. However, market squid abundance varies greatly from year to year, ostensibly as a result of the El Niño Southern Oscillation (ENSO) phenomenon, although the underlying mechanism is not known. Classic hypotheses suggest that the early larval stage may be the key to uncovering this mechanism. Here, we perform a time series analysis, length‐distribution analysis, and growth analysis to investigate the effects of ENSO on paralarval D. opalescens. In contrast to classic hypotheses, we find that ENSO does not drive early paralarval survival or growth. Instead, we find that the ENSO operates primarily on the late paralarval stage, with El Niño conditions associated with lower survival of late‐stage paralarvae. We also find that time series models which use ENSO conditions during the previous juvenile and adult stage outperform models that use ENSO conditions during the paralarval stage. Our results suggest that the population bottleneck for D. opalescens does not occur in the early paralarval stage, but instead lies later in the squid's life.  相似文献   

Retracted: Effect of concentration of the microalga Dunaliella tertiolecta on survival and growth of fairy shrimp,Phallocryptus spinosa Milne Edwards, 1840 (Crustacea: Anostraca)          下载免费PDF全文

Mohammad Reza Gharibi  Behroz Atashbar  Naser Agh  Mohammadali Nematollahi  Mohammad Sadegh Aramli  Ahmad Noori 《Aquaculture Research》2016,47(9):2976-2982

We investigated the effects of concentration of the microalga Dunaliella tertiolecta on the growth and survival of fairy shrimp, Phallocryptus spinosa. Newly hatched nauplii were stocked into containers, maintained at different concentrations of D. tertiolecta (at 18, 36, 54, 72 and 90 × 10⁶ cells mL^?1). All treatments were in quadruplicate and each replicate was stocked with 100 larvae in a 2‐L cylindrical bowl. We studied the survival and growth of the fairy shrimp after 3, 6, 9, 12 and 15 days of culture. The results indicated significant differences, in terms of growth and survival, of fairy shrimps fed at different algal densities. The highest and lowest growth and survival among the treatments were observed on Day 15, the highest in animals fed at a concentration of 90 × 10⁶ cells mL^?1 and the lowest in animals fed at a concentration of 18 × 10⁶ cells mL^?1. We conclude that the growth and survival of the P. spinosa increased with increasing density of algae, to a threshold level. Within certain concentration limits, the addition of D. tertiolecta substantially improved the performance of larval culture of P. spinosa, suggesting that this fairy shrimp has potential in terms of aquaculture development.  相似文献   

Physiological,ionoregulatory, metabolic and immune responses of Persian sturgeon,Acipenser persicus (Borodin, 1897) to stress          下载免费PDF全文

Seyyed Morteza Hoseini  Lluis Tort  Mohammad Hadi Abolhasani  Hamid Rajabiesterabadi 《Aquaculture Research》2016,47(12):3729-3739

The physiological ionoregulatory, metabolic and immune responses of Persian sturgeon, Acipenser persicus, to acute stress were investigated. Water levels were lowered to the fish dorsal scutes, and fish were blood‐sampled before stress (pre‐stress), and 0, 6, 24 and 72 h after stress. Results showed that serum cortisol rapidly increased after stress, returning to initial levels at 24 h. Serum glucose significantly increased at 6 h, declining to the pre‐stress levels at 72 h. Serum triglyceride and cholesterol showed significant decreases at 0 h, then increasing to higher than the initial levels at 72 h. Serum T₃ and T₄ significantly decreased at 0 h and recovered at 72 h. Serum chloride levels showed no significant changes while serum calcium showed a significant increase at 0 h and a further increase until 72 h poststress. Serum total protein and alternative complement activity showed a significant initial decrease and recovery at 24 h with further increase at 72 h. Serum lysozyme activity increased significantly at 24 and 72 h after stress. Serum total immunoglobulin significantly increased at 0 h and peaked at 24 h. This is the first work showing thyroid hormone and immunological responses in Persian sturgeon subjected to stress, and the results show that this species follows a classical hormonal and energetic stress response, although, in the low range among the sturgeons. Although transient and moderate, confinement stress can induce significant changes in the innate immune response.  相似文献   

Allelopathic potential of indigenous Bangladeshi rice varieties          下载免费PDF全文

Sheikh M. Masum  Mohammad Amzad Hossain  Hikaru Akamine  Jun‐Ichi Sakagami  Prasanta C. Bhowmik 《Weed Biology and Management》2016,16(3):119-131

A series of experiments was conducted in the laboratory and greenhouse of the Subtropical Field Science Center, University of the Ryukyus, Japan, from April to October 2015 to assess the allelopathic potential of 50 indigenous Bangladeshi rice varieties by using the donor–receiver bioassay, equal compartment agar method (ECAM), plant residue extract method and pot culture method. Lettuce (Lactuca sativa L.), cress (Lepidium sativum L.), radish (Raphanus sativus L.), barnyard grass (Echinochloa crus‐galli L. Beauv.) and jungle rice (Echinochloa colona L.) were used as the test plants. The highest inhibition effect was given by Boterswar, while the stimulating effect was given by Kartikbalam and Panbira in the donor–receiver bioassay and ECAM tests. Boterswar, Goria, Biron and Kartiksail were selected as the highest allelopathic‐potential varieties by the donor–receiver bioassay and ECAM. In the methanol extract test, Boterswar gave the strongest inhibitory effect on both barnyard grass and jungle rice, while Kartiksail gave the highest inhibitory effect on the jungle rice shoot. The growth parameters and total dry matter of barnyard grass in the greenhouse pot experiment were significantly reduced as a result of the application of aqueous extracts of the selected rice varieties, which was similar to the results of the laboratory experiments. The varieties of Boterswar, Goria, Biron and Kartiksail were selected as the most allelopathic among the 50 indigenous Bangladeshi rice varieties. These rice varieties could be used for the isolation and identification of allelochemicals and to further develop new varieties that are tolerant to weeds.  相似文献