The study of vitelline gland of Haploporus lateralis (Digenea: Trematoda)     

Sampour M 《Pakistan journal of biological sciences: PJBS》2008,11(1):113-117

The study of vitelline glands of digenean Haploporus lateralis, indicates that the glands consist of vitelocytes in various stages of maturation. The cytoplasmic process of nurse cells which surrounded the vitelline lobes, intrude between vitelocytes and surround them. Immature vitelline cells are undifferentiated, they possess small amount of cytoplasm and large nucleus. The synthesis of shell globules begin in the maturing vitelline cells. Increasing numbers of vitellocytes reach develop of mature vitelline cells. The cytoplasm of mature vitelline cells is filled with shell globules. Mature vitelline cells usually found in the center of vitelline lobe. They release into the vitelline duct and vitelline reservoir. The vitelline reservoir and duct are lined with a syncytial epithelium. Basement membrane is present between nurse cells and vitelline cells.  相似文献   

Biodegradation of Toluene Under Seasonal and Diurnal Fluctuations of Soil-Water Temperature   总被引：1，自引：0，他引：1  

Yadav BK  Shrestha SR  Hassanizadeh SM 《Water, air, and soil pollution》2012,223(7):3579-3588

An increasing interest in bioremediation of hydrocarbon polluted sites raises the question of the influence of seasonal and diurnal changes on soil-water temperature on biodegradation of BTEX, a widespread group of (sub)-surface contaminants. Therefore, we investigated the impact of a wide range of varying soil-water temperature on biodegradation of toluene under aerobic conditions. To see the seasonal impact of temperature, three sets of batch experiments were conducted at three different constant temperatures: 10°C, 21°C, and 30°C. These conditions were considered to represent (1) winter, (2) spring and/or autumn, and (3) summer seasons, respectively, at many polluted sites. Three additional sets of batch experiments were performed under fluctuating soil-water temperature cases (21<>10°C, 30<>21°C, and 10<>30°C) to mimic the day-night temperature patterns expected during the year. The batches were put at two different temperatures alternatively to represent the day (high-temperature) and night (low-temperature) times. The results of constant- and fluctuating-temperature experiments show that toluene degradation is strongly dependent on soil-water temperature level. An almost two-fold increase in toluene degradation time was observed for every 10°C decrease in temperature for constant-temperature cases. Under fluctuating-temperature conditions, toluene degraders were able to overcome the temperature stress and continued thriving during all considered weather scenarios. However, a slightly longer time was taken compared to the corresponding time at daily mean temperature conditions. The findings of this study are directly useful for bioremediation of hydrocarbon-polluted sites having significant diurnal and seasonal variations of soil-water temperature.  相似文献   

High prevalence of vitamin D deficiency in school-age children in Tehran, 2008: a red alert     

Neyestani TR  Hajifaraji M  Omidvar N  Eshraghian MR  Shariatzadeh N  Kalayi A  Gharavi A  Khalaji N  Haidari H  Zowghi T  Nikooyeh B 《Public health nutrition》2012,15(2):324-330

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Biomanagement of Fusarium wilt of tomato by the soil application of certain phosphatesolubilizing microorganisms     

Mujeebur Rahman Khan  Shahana Majid Khan 《国际虫害防治杂志》2013,59(3):227-231

Abstract

We tested whether a new automated bait dispenser, the Scentinel®, could be programmed to deliver non-toxic bait selectively only to animals of specified dimensions (>400 g body weight and <110 mm body diameter, the size of a ferret or a mink). We tested whether wild ferrets would discriminate between two types of bait (egg/oil and homogenised brain tissue). We set 24 Scentinels in 12 randomised pairs for 11 weeks on a 2400-ha area of pastoral farmland in New Zealand. Of 1559 visits by small animals, 198 were by ferrets (c. 28 individuals). The Scentinels correctly delivered 895 baits to visitors weighing >400 g, and no baits to 543 visitors of <400 g. The mean body weight of live ferrets recorded by Scentinels was not significantly different from that of 34 carcasses collected from the same area by professional trappers. Of the 145 baits dispensed to ferrets, egg/oil bait was significantly more often eaten. We conclude that the Scentinel can reliably deliver bait to specified sizes of animals and deny it to others. It can also facilitate extensive bait preference tests on unrestrained wild pests.  相似文献   

Effect of resin content and pressure on the performance properties of rubberwood-kenaf composite Board Panel     

Majid Dehghan Nayeri  Paridah Md Tahir  Mohammad Jawaid  Jalaluddin Harun  Luqman Chuah Abdullah  Edi Suhaimi Bakar  Samaneh Keshani  Farideh Namvar 《Fibers and Polymers》2014,15(6):1263-1269

The possibility of manufacturing rubberwood and kenaf (Hibiscus cannabinus L.) stem medium density fibreboard (MDF) panels at different pressure and resin content were investigated. The effect of mechanisms of interacted independent variables (resin content and pressure) on MDF properties was analyzed. The board performance was evaluated by measuring internal bond (IB) strength, modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swell (TS). The test results were statistically analyzed by using response surface method (RSM) to determine the significant independent variables that influenced MDF properties. A mathematical simulation or response surface models were developed to predict the MDF properties (MOR, MOE, IB, WA and TS). The obtained results showed that MDF density and all interactions between the experimental variables were significant factors that influenced the mechanical properties of MDF. At 8 bar and 14 % resin content, the MDF recorded WA of 83.12 % and TS of 20.2 %. It can be inferred that two parameters (resin content and pressure) had positive effect on physical and mechanical properties of MDF. We concluded that resin content show more significant effects on MDF manufacturing as compared to pressure parameters.  相似文献   

Effect of preceding crops and their residues on availability of zinc in a calcareous Zn-deficient soil   总被引：1，自引：0，他引：1  

Hadi Habiby  Majid Afyuni  Amir Hossein Khoshgoftarmanesh  Rainer Schulin 《Biology and Fertility of Soils》2014,50(7):1061-1067

Limited information is available on the effect of preceding crop on phytoavailability of zinc (Zn) in soil. This pot experiment examined the effect of four preceding crops including clover, sunflower, safflower, and sorghum residues on shoot and grain Zn uptake by two wheat genotypes differing in Zn-deficiency tolerance Back Cross and Kavir in a calcareous Zn-deficient soil. Incorporation of all preceding crop residues into the soil significantly increased organic matter (OM) content, dissolved organic C (DOC), and diethylene triamine pentaacetic acid (DTPA) extractable Zn concentration in the soil. Residues of safflower and clover had the greatest effect on increasing DOC. Shoot and grain Zn concentrations were increased by incorporating all pre-crop residues into the soil although this increase was greater at safflower and clover treatments. Incorporation of sorghum residues into the soil had a negative effect on shoot and grain dry matter yield of wheat. Incorporation of safflower and clover residues into the soil increased Zn uptake by wheat shoot and grain. There was a positive significant correlation between shoot and grain Zn concentration with DOC in soil solution. It shows that DOC, produced from decomposition of crop residues, has facilitated Zn uptake by roots of wheat plants and particularly its transfer to grains.  相似文献   

The effect of preceding crop on wheat grain zinc concentration and its relationship to total amino acids and dissolved organic carbon in rhizosphere soil solution   总被引：2，自引：0，他引：2  

Shabnam Soltani  Amir H. Khoshgoftarmanesh  Majid Afyuni  Mehran Shrivani  Rainer Schulin 《Biology and Fertility of Soils》2014,50(2):239-247

The role of cropping systems practices in agronomic biofortification programs with the aim of increasing micronutrient density in food plants has to be clarified. In these field experiments, the effect of four preceding crops, i.e., sunflower (Heliantus annus L. cv. Allstar), Sudan grass (Sorghum bicolor L. cv. Speed Feed), clover (Trifolium pratense L.), and safflower (Carthamus tinctorius L. cv. Koseh-e-Isfahan), on the total amino acids (AA) and dissolved organic carbon (DOC) concentration in rhizosphere soil solution and grain Zn content of successive wheat (Triticum aestivum cvs. Back Cross and Kavir) was investigated during 2009–2010 and 2010–2011 growing seasons. A fallow treatment was also considered as the control. In both growing seasons, preceding crops increased the concentrations of AA and DOC in the soil solution in comparison with the fallow control treatment; although the magnitude of this increase varied upon the preceding crop type and wheat cultivar. In general, clover and sunflower had greater effect on increasing soil solution DOC probably due to higher decomposability of their litter residues in soil. Preceding crops increased the total AA concentration, on average, by 45.9 % for the first year and 10.8 % for the second year. The preceding sorghum and clover had the highest and lowest influence on the concentration of AA in wheat rhizosphere soil solution, respectively. The preceding crops increased grain wheat Zn concentration and content over the fallow control treatment, although this effect was dependent on the crop type. For “Back Cross”, a positive and significant correlation was found between grain Zn concentration and soil solution DOC concentration (r?=?0.60, P?<?0.05) and particularly AA (r?=?0.76, P?<?0.001), while no such correlation was found for “Kavir”. At the second growing season, the concentration of AA in the rhizosphere of Back Cross was greater than that of Kavir, probably due to higher release of these compounds from the roots. According to the results, the preceding crop significantly affect grain Zn density of the successive wheat, that is, at least in part, by releasing soluble organic ligands into soil solution.  相似文献   

A new species of the genus Xiphinema Cobb 1913 (Nematoda: Longidoridae) from north and northwest Iran     

Fadakar  Samira  Pourjam  Ebrahim  Barsi  László  Pedram  Majid 《European journal of plant pathology / European Foundation for Plant Pathology》2021,160(3):557-574

European Journal of Plant Pathology - Five populations of a new dagger nematode species were recovered from natural grasslands and forests of north and northwest Iran, and described based upon...  相似文献   

Correction to: A new species of the genus Xiphinema Cobb 1913 (Nematoda: Longidoridae) from north and Northwest Iran     

Fadakar  Samira  Pourjam  Ebrahim  Barsi  László  Pedram  Majid 《European journal of plant pathology / European Foundation for Plant Pathology》2021,160(3):753-753

European Journal of Plant Pathology - A Correction to this paper has been published: https://doi.org/ https://doi.org/10.1007/s10658-021-02272-1  相似文献   

Vis/NIR spectroscopy and chemometrics for the prediction of soluble solids content and acidity (pH) of kiwifruit     

Ali Moghimi  Mohammad H. Aghkhani  Ameneh Sazgarnia  Majid Sarmad 《Biosystems Engineering》2010,106(3):295-302

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