Increasing antimicrobial resistance among Shigella isolates in the Bushehr, Iran     

Gharibi O  Zangene S  Mohammadi N  Mirzaei K  Karimi A  Gharibi A  Khajehiean A 《Pakistan journal of biological sciences: PJBS》2012,15(3):156-159

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Effects of Different Dietary Lipid Sources on Growth Performance,Salinity Tolerance,Haematological and Biochemical Parameters of Caspian Roach (Rutilus rutilus caspicus) Juvenile     

Somayeh Pouralimotlagh  Asad Mohammadi Zarejabad  Ehsan Ahmadifar 《Journal Of Applied Aquaculture》2013,25(1):74-85

This study investigates the effects of replacing fish oil with two vegetable oils (Sunflower oil and Soybean oil) on growth performance, salinity tolerance, hematological and serum biochemical profile of Rutilus rutilus over 56 days. Five diets were supplemented with 8% of either fish oil (FO) (control), sunflower oil (SFO), and soybean oil (SO) or a combination of 4% FO with 4% SFO and 4% FO with 4% SO, respectively. Triplicate groups of fish (24 fish per tank with an average body weight, of 5.52 g) were assigned to each diet. Blood samples were taken from the caudal vein of 75 apparently healthy fish at the end of trial. Hematological values of the blood samples were determined using standard techniques. At the end of the experiment fish were exposed to salinity stress. The results showed that the best growth performance was in fish fed the control diet, but the differences were minor among treatments containing vegetable oils (P > 0.05). Serum cholesterol and glucose concentrations were significantly higher in fish fed dieta containing vegetable oils (P < 0.05). Red blood cell count (RBC), hematocrit (Ht) and hemoglobin (Hb) in groups fed diets containing SFO and SO were higher than other groups (P < 0.05). There was no significant difference in survival after 48 h salinity stress (P > 0.05). These results indicate that in cases where fish oil is scarce or expensive, vegetable lipids can be used as replacements without any serious negative growth performance and health impacts.  相似文献   

The use of parametric and non-parametric measures for selecting stable and adapted barley lines     

Behrouz Vaezi  Asghar Mehraban  Tahmasb Hossein-Pour  Rahmatolah Mohammadi  Mohammad Armion 《Archives of Agronomy and Soil Science》2018,64(5):597-611

This research was carried out to estimate yield stability of 18 barley breeding lines using different parametric and non-parametric statistics across 15 environments during 2012–2015 growing seasons. The results of combined analysis of variance (ANOVA) and additive main effect and multiplicative interaction (AMMI) analysis showed that environments (E), genotypes (G), GE interaction, as well as the first four interaction principal component axes were highly significant, suggesting that the lines interacted differentially with environments, so further general adaptability and stability analysis across environments should be followed before being introduced for cultivation. Based on correlation coefficient and principal components analysis (PCA), most of the non-parametric statistics were significantly inter-correlated with parametric statistics, hence seem to be suitable alternatives to complement parametric statistics. Furthermore, according to the static and dynamic concepts of stability, the results revealed that stability statistics can be clustered into three groups. The overall stability analysis following different stability methods concluded that four lines (G5, G7, G17 and G20) were highly stable for grain yield in rain-fed conditions of subtropical regions of Iran. Thus, these lines can be recognized as the most stable lines for cultivation in diverse environments of semi-warm regions of Iran.  相似文献   

Influence of suspended particulates on phosphorus loading exported from farm drainage during a storm event in the Everglades Agricultural Area     

Bhadha  Jehangir H.  Lang  Timothy A.  Daroub  Samira H. 《Journal of Soils and Sediments》2017,17(1):240-252

Purpose

The purpose of this study was to evaluate the influence of suspended particulates on P loading captured during a single storm event. The Everglades Agricultural Area of Florida comprises 280,000 ha of organic soil farmland artificially drained by ditches, canals, and pumps. Phosphorus (P)-enriched suspended particulates in canals are susceptible to transport and can contribute significantly to the overall P loads in drainage water.

Materials and methods

A settling tank experiment was conducted to capture suspended particulates during tropical storm Isaac in 2012 from three farms approximately 2.4 to 3.6 km² in size. Farm canal discharge water was collected in a series of two 200-L settling tanks over a 7-day drainage period, during tropical storm Isaac. Water from the settling tanks was siphoned through Imhoff settling cones, where the suspended particulates were allowed to settle and collected for P fractionation analyses, and compared to intact sediment cores collected from the canals.

Results and discussion

The discharged suspended particulates contained higher organic matter content, total P, and labile P fractions compared to the drainage canal sediments. Based on the equilibrium P concentrations, drainage canal sediments behave as a source of P to the water column. A 7-day continuous drainage event exported 4.7 to 11.1 t of suspended solids per farm, corresponding to 32 to 63 kg of particulate P being lost to downstream ecosystems. Drainage associated to this single 7-day storm event exported up to 61 % of the total annual farm P load.

Conclusions

It is evident from this study that short-term, high-intensity storm events can skew annual P loads due to the export of significantly higher suspended particulate matter from farm canals. Exported particulates rich in P, if captured and replenished back on farmlands, would be a sustainable farming practice that can provide a supplemental source of nutrients.

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Decline‐associated Phaeoacremonium species occurring on forest trees in the north of Iran          下载免费PDF全文

M. Kazemzadeh Chakusary  H. Mohammadi  S. A. Khodaparast 《Forest Pathology》2017,47(6)

Between 2013 and 2015, several surveys were conducted throughout forest areas in the north of Iran with the aim of isolating and identifying fungi present on trees showing decline symptoms. Fungal species, isolated from symptomatic wood tissues of various tree genera, including Zelkova, Acer, Parrotia, Quercus, Diospyros, Fagus, Fraxinus, Populus, Pinus, Pterocarya, Gleditsia, Carpinus, Ulmus, Crataegus, Alnus, Mespilus, Punica, Cydonia, Cupressus and Prunus, were morphologically identified and characterized. A molecular identification based on comparisons of DNA sequences of the β‐tubulin gene allowed us to identify seven species belonging to Phaeoacremonium; namely, Phaeoacremonium parasiticum, Pm. alvesii, Pm. minimum, Pm. iranianum, Pm. scolyti, Pm. fraxinopennsylvanicum and Pm. croatiense were isolated and identified. Phaeoacremonium minimum was the most common species and isolated from Gleditsia caspica, Parrotia persica, Cydonia oblonga and Alnus glutinosa. Pathogenicity on selected plants using a mycelium plug inoculation method revealed that most of these species are pathogenic to all the tested trees, with Pm. parasiticum and Pm. minimum being the most pathogenic species. According to host plant species and geographical distribution, the majority of Phaeoacremonium species found represent new records. This is also the first report of Pm. croatiense in Iran and outside Croatia.  相似文献   

Detection of Atypical Cultivable Canine Gastric Helicobacter Strain and its Biochemical and Morphological Characters in Naturally Infected Dogs     

A. Shabestari Asl  S. Jamshidi  M. Mohammadi  M. H. Soroush  A. Bahadori  A. Oghalaie 《Zoonoses and public health》2010,57(4):244-248

Helicobacter‐like organisms are frequently found in canine stomachs, but the relationship between such organisms and gastric pathology has not been established. However, some such organisms have zoonotic importance. The aims of this study were to evaluate the morphological and biochemical characteristics of cultivable canine gastric Helicobacter‐like organisms (GHLOs) in pets and stray dogs and their prevalence in these two groups of dogs. Specimens were taken by gastroscopy from 30 clinically healthy stray dogs and 30 pet dogs. Cultures were positive from biopsies of 11/30 of stray and 6/30 of pet dogs. The isolated Helicobacters were observed by light microscopy and studied by biochemical, physiological and PCR analysis. Some of the isolated GHLO's displayed atypical shapes that were similar to Helicobacter pylori or Helicobacter acinonychis in stray dogs’ cytological examinations. They had 2–3 helices and were smaller than other canine GHLOs. One of these atypical Helicobacter strains was cultured. It was not possible to distinguish such strains by routine PCR and biochemical evaluations. Electron microscopy showed a smaller Helicobacter (2 μm in length) with 2 or 3 helixes. This study demonstrates that not all canine gastric Helicobacters are 5–15 μm in length, as has been previously proposed, and portrays the need for further investigation of canine GHLOs.  相似文献   

Digestibility of selected feedstuffs in subadult Caspian great sturgeon,Huso huso using settlement faecal collection and stripping methods          下载免费PDF全文

O. Safari  M. Naserizadeh  M. Mohammadi Arani 《Aquaculture Nutrition》2016,22(2):293-303

Apparent crude protein (ADC_CP), crude fat (ADC_CF) and gross energy (ADC_GE) digestibility coefficients of several typical and novel feedstuffs were determined to be employed in the formulated diets of subadult beluga (17.70 ± 0.234 kg) diets via two faecal collection methods of settlement (SFCM) and stripping (StM). The tested feedstuffs included three fish meals, three terrestrial animal by‐products, three plant protein concentrates, nine high‐protein plant meals and three low plant protein meals. ADC_CP values varied in different fish meals ranging from 89.5% for Mexican sardine meal to 93.2% for anchovy meal with SFCM. ADC_CP values for plant protein concentrates ranged from 82.8% for wheat gluten meal to 92% for soy protein with SFCM. ADC_CP ranged from 37.2% for whole wheat to 75.6% for spirulina meal with SFCM. ADC_GE was lower in low‐protein plant meals (64.1%) in comparison to high‐protein plant meals (70.2%). Fish meals showed the highest ADC_CF values. A significant (P < 0.05) quadratic regression relation (r² = 0.92) was observed among in vivo ADC_CP of five feedstuff classes fed to beluga and in vitro ADC_CP. The differences among ADC values appear to be significantly related to the effects of feedstuffs and therefore diet and faecal collection methods.  相似文献   

Genome wide association study of grain yield and yield related traits in spring bread wheat (Triticum aestivum L.) under drought and heat conditions in three different locations     

El Gataa  Zakaria  El Hanafi  Samira  Basheer  Fadil  Kehel  Zakaria  bouhouch  Yassin  El Messoadi  Khalil  Eddakir  Kenza  Ladraa  Nawel  Samir  Karima  Tadesse  Wuletaw 《Journal of Crop Science and Biotechnology》2021,24(4):361-373

Journal of Crop Science and Biotechnology - Abiotic stress, especially drought and heat, affects cereal yields and wheat production worldwide, more particularly in West and South Asia, North...  相似文献   

Polycyclic Aromatic Hydrocarbons in Seawater, Sediment, and Rock Oyster Saccostrea cucullata from the Northern Part of the Persian Gulf (Bushehr Province)     

Roozbeh Mirza  Mehdi Mohammadi  Ali Dadolahi Sohrab  Alireza Safahieh  Ahmad Savari  Pavaneh Hajeb 《Water, air, and soil pollution》2012,223(1):189-198

The concentration of polycyclic aromatic hydrocarbons (PAHs) was determined in seawater, sediment, and Rock oyster Saccostrea cucullata collected from four sampling sites in the inter-tidal areas of Bushehr province. The total concentrations of 14 PAHs varied from 1.5 to 3.6 ng/L in seawater, 41.7 to 227.5 ng/g dry weight in surface sediment, and 126 to 226.1 ng/g dry weight in oyster tissue. In comparing PAH concentrations among the three matrices in Bushehr province, data showed that the pattern of individual PAHs in seawater, oyster, and sediment were different. The oysters tended to accumulate the lower molecular weight and the more water-soluble PAHs. Sediment samples were distinguished from the sea water and oyster samples by the presence of high molecular weight PAHs, especially six-ring PAHs. Three- and four-ring PAHs were the most abundant compounds among the 14 PAHs investigated in surface seawater, sediment, and oyster samples. As expected, differences in octanol/water partition coefficient among individual PAHs and the greater persistence of the higher molecular weight PAHs contributed to the accumulation patterns in oyster and sediment. The results of the study suggested that the main sources of PAHs in the seawater and sediment in the region were mixed pyrolitic and petrogenic inputs.  相似文献   

Physicochemical assessment and phosphorus storage of canal sediments within the Everglades Agricultural Area, Florida     

Jaya Das  Samira H. Daroub  Jehangir H. Bhadha  Timothy A. Lang  Orlando Diaz  Willie Harris 《Journal of Soils and Sediments》2012,12(6):952-965

Purpose

Excess nutrients such as phosphorus (P) transported from the Everglades Agricultural Area (EAA) in South Florida, USA, to downstream water bodies have been identified as contributing to trophic imbalances within the Florida Everglades. Decades of farming drainage from the EAA has led to accumulation of sediments in regional canals which may be transported to downstream ecosystems and act as potential internal source of P.

Materials and methods

Intact sediment cores were collected from three main conveyance and three farm canals within the EAA. Physicochemical assessment, mineralogy, P speciation, and storage were determined for surface and subsurface layers.

Results and discussion

The main conveyance canal sediments had higher total P (TP) concentrations (1,280?±?360?mg?kg^-1) than the farm canals (960?±?540?mg?kg^-1), while farm canal sediments showed higher organic matter content (28?C53?%) compared to the main canal (24?C27?%) sediments. The minerals found in main conveyance canal sediments were similar to those found in Lake Okeechobee. The labile KCl?CP fraction comprised <2?% of TP from all canal sediments, while NaOH?CPi (i?=?inorganic) fraction consisted of 1?C14?% of TP. The majority of P in the canal sediments was contained in the HCl?CP fraction (Ca?CP and Mg?CP), comprising >50?% of TP in the main and farm canal sediments. An estimated 73 metric tons (mt) of P was stored in the 0?C10-cm layer of the three main conveyance canals within the EAA boundary of which 57-mt P is reactive and potentially available for release at different time scales.

Conclusions

The EAA canal sediments are highly organic with low bulk density and susceptible of being transported to downstream ecosystems. Many factors can impact the potential release of the reactive stored P, including redox potential of sediments as well as the overlying water column P concentration. Further investigation of potential P release from these sediments is warranted.  相似文献