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41.
Landscape Ecology - Landscape complexity affects herbivores in agroecosystems, but consequences on pest control services are variable. Carryover effects of landscape composition in previous years... 相似文献
42.
Ebadi Arash Raja Omid Ebrahimian Hamed Yazdani Mohammad Reza Rezaverdinejad Vahid 《Paddy and Water Environment》2022,20(1):151-151
Paddy and Water Environment - 相似文献
43.
Magnetosomes are membranous bacterial organelles sharing many features of eukaryotic organelles. Using electron cryotomography, we found that magnetosomes are invaginations of the cell membrane flanked by a network of cytoskeletal filaments. The filaments appeared to be composed of MamK, a homolog of the bacterial actin-like protein MreB, which formed filaments in vivo. In a mamK deletion strain, the magnetosome-associated cytoskeleton was absent and individual magnetosomes were no longer organized into chains. Thus, it seems that prokaryotes can use cytoskeletal filaments to position organelles within the cell. 相似文献
44.
Anaphylactic reaction rarely occurs after the 1st injection of
penicillin-streptomycin in cattle. Immediately following intramuscular injection
of a Holstein-Friesian cow with penicillin-streptomycin, the cow showed abnormal
clinical signs that included respiratory distress, urticaria, and lacrimation.
Recovery took approximately 2 h after intramuscular injection of dexamethasone.
This report presents clinical findings recorded 20 and 40 h later. 相似文献
45.
Hossein Ali Alikhani Arash Hemati Mehdi Rashtbari Scott D. Tiegs Hassan Etesami 《Communications in Soil Science and Plant Analysis》2017,48(2):139-147
In the present study we evaluated changes in phosphorus (P), nitrogen (N), and humic acid (HA) contents of vermicompost (VC) in response to temperature increases, and inoculation with N2-fixing and P-solubilizing microbes. Inoculants of Pseudomonas and Azotobacter were prepared and used to inoculate VC that was kept at 28 and 41 °C. Biological and chemical parameters of the VC were evaluated at 0, 20, 40, and 60 days. As incubation duration increased, bacterial population, N, available P, and HA content increased while organic carbon and pH decreased. These changes were most rapid during the initial 40 days of the experiment, and slowed subsequently. Increasing temperature from 28 to 41 °C reduced bacterial population and the efficiency of these bacteria in improving VC quality. Overall, our results indicate that inoculation of VC with microbes holds promise as a means of increasing the quality of VC, while our increased temperature treatment was less effective. 相似文献
46.
Ghafouri Seyed Ali GhalyanchiLangeroudi Arash Maghsoudloo Hossein KH Farahani Reza Abdollahi Hamed Tehrani Farshad Fallah Mohammad Hossein 《Tropical animal health and production》2017,49(5):1089-1093
Tropical Animal Health and Production - In 2010, H5N8 highly pathogenic avian influenza (HPAI) viruses of the A/Goose/Guangdong/1/1996 lineage dramatically affected poultry and wild birds in Asia,... 相似文献
47.
Chlorella vulgaris meal improved growth performance,digestive enzyme activities,fatty acid composition and tolerance of hypoxia and ammonia stress in juvenile Pacific white shrimp Litopenaeus vannamei 
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下载免费PDF全文 S. Pakravan A. Akbarzadeh M.M. Sajjadi A. Hajimoradloo F. Noori 《Aquaculture Nutrition》2018,24(1):594-604
This study was conducted to investigate the effectiveness of fish meal substitution by Chlorella vulgaris meal in the diet of Pacific white shrimp, Litopenaeus vannamei. Experimental diets contained varying levels of fish meal (400, 300, 200, 100 and 0 g/kg) which was replaced by increasing levels of C. vulgaris (0, 97.2, 194.4, 291.6 and 388.8 g/kg). After 8 weeks of feeding trial, shrimp fed diet with 97.2 g/kg C. vulgaris showed significantly improved growth compared to other treatments including control. Similarly, shrimp fed diet with 97.2 g/kg C. vulgaris showed significantly higher amount of trypsin and amylase activities compared to other treatments. The contents of long‐chain polyunsaturated fatty acids including eicosapentaenoic acid, docosahexaenoic acid and arachidonic acid were significantly higher in the whole body of L. vannamei fed with different levels of C. vulgaris compared to those of control group. After exposure to hypoxia, the survival rate of shrimp fed diets contained different levels of C. vulgaris was higher than that of control group, while no significant differences were observed in ammonia tolerance among treatments. In conclusion, this study indicated that fish meal can be completely replaced with C. vulgaris in the diet of juvenile L. vannamei with no adverse effects on the performance of shrimp. 相似文献
48.
Karimi Vahid Mohammadi Peyman Ghalyanchilangeroudi Arash Ghafouri Seyed Ali Hashemzadeh Masoud Farahani Reza Khaltabadi Maghsouldoo Hussein Isakakroudi Nima 《Tropical animal health and production》2019,51(3):629-635
Tropical Animal Health and Production - Infectious bronchitis virus (IBV) is a highly infectious pathogen, which affects the respiratory tract, reproductive system, and kidney of chickens. Many... 相似文献
49.
Chiani M Akbarzadeh A Farhangi A Mazinani M Saffari Z Emadzadeh K Mehrabi MR 《Pakistan journal of biological sciences: PJBS》2010,13(11):546-550
The aim of this study was optimization of culture medium in direction of increasing the production rate of desferrioxamine B. Streptomycetes are the most widely studied and well known genus of the actinomycete family. Streptomycetes usually inhabit soil and are important decomposers. The genus Streptomyces are Gram-positive and GC rich bacteria that are important for production of many antibiotics and secondary metabolites. These metabolites are important in industrial and medical fields. Deferoxamines (also known as desferrioxamine B, desferoxamine B, DFO-B, DFOA, DFB or desferal) are low-molecular-weight, iron-chelating compounds (siderophores) produced and secreted by many actinomycetes, including species of Streptomyces, Nocardia and Micromonospora. Streptomyces pilosus synthesizes the siderofore desferrioxamine B. Desferrioxamine B is used clinically to treat disorders related to iron overload and pathological iron deposition in human. Our results revealed that the use of soybean as a base medium plus additives such as Na2HPO4.12H2O, NaH2PO4, MgSO4.7H2O, ZnSO4.7H2O, FeSO4.7H2O, CaCl2.2H2O, NaCl, MnSO4, NH4Cl, KH2PO4, K2HPO4, some of the amino acids and vitamins increased the production of desferrioxamine B about 8 times in comparison with the control. 相似文献
50.
Chiani M Akbarzadeh A Farhangi A Mehrabi MR 《Pakistan journal of biological sciences: PJBS》2010,13(23):1151-1155
The aim of this study was evaluation of corn steep liquor as an alternative or substitution medium for production of desferrioxamine B in streptomyces pilosus. Desferrioxamine B is the major siderophore of Streptomyces pilosus. The genus Streptomyces are Gram positive and GC (Guanine/Cytosine) rich bacteria that are important for production of many antibiotics and secondary metabolites. These metabolites get more attention in industrial and medical fields. Desferrioxamine B is used clinically to treat disorders related to iron overload and pathological iron deposition in human. Corn Steep Liquor (CSL) is a by-product of corn wet-milling. It is an excellent source of organic nitrogen and important constituent of some culture media. Nowadays CSL was mainly used for feeding of livestock. In this study we substitute the conventional media with CSL and surveyed its effect on production of desferrioxamine B. The CSL is cheaper than other media and its availability is so easy. In this research, for the first time we used a cheap material for production of a valuable product. Our results showed that the use of CSL solely, increased the production of Desferal more than three times in comparison with conventional media such as soybean. 相似文献