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The adaptation of a Du Pont Thermogravimetric Analyser for the measurement of magnetic susceptibility as a function of temperature in the range − 80 °C to 300 °C is described.

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Agrokémia és Talajtan
Authors: Boglárka Keller, Judit Szabó, Csaba Centeri, Gergely Jakab, and Zoltán Szalai

Summary

Adaptation is the most important strategy to reduce the effect of climate change and soil erosion. During this process adequate, rational land use is necessary to ensure climate resilience. Therefore, the main objective in this study was to evaluate the susceptibility of different land use intensities (arable land and grassland) to soil erosion. The rainfall simulation method is a good tool to measure and estimate soil erosion in situ. The comparative measurements were carried out in the field with a Shower Power-02 simulator on 6 m2 plots in Gerézdpuszta, where the slope angles were ~8% and the simulated rainfall events had high intensities (~70-96 mm h−1). The runoff and soil loss were significantly higher from arable land. The runoff-infiltration ratio and runoff coefficient showed lower infiltration capacity in the case of arable land. On average, the suspended sediment loads were tenfold higher under intensive land use. In the case of grassland a moderate increase in infiltration was observed due to higher rainfall intensity, as also reported in the literature. The rainfall simulation method provides good data for soil loss estimations.

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Stoichiometrically adjusted antimony triselenide and antimony tritelluride semiconductors were carefully prepared for the first time. Numerous measurements were carried out, involving X-ray diffraction analysis, true density, thermogravimetric analysis and the temperature-dependence of the magnetic susceptibility. The results obtained indicated that antimony triselenide and antimony tritelluride polycrystals possess mass susceptibilities of −0.361×10−6 and −0.386×10−6 C.G.S., respectively. The results are discussed on the basis of electronegativity difference, partial ionicity of the bond, and bond strength.

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Thermal characteristics of the vanadates of zinc, manganese and silver have been studied by DTA and TG techniques and the different transition products thus obtained have been characterised by IR, X-ray diffraction and magnetic susceptibility data. Chemical analyses indicate the following compositions of these vanadates: (1) Zn2V2O7.5H2O, (2) Zn3(VO4)2.3H2O, (3) Mn(VO3)2.2H2O and (4) Ag3VO4. The DTA curves indicate that zinc pyrovanadate undergoes endothermic changes at 110–195, 265, 365, 440, 660° and one exothermic change at 485°. This system is diamagnetic which becomes completely paramagnetic after 660°. Zinc orthovanadate exhibits a number of endothermic peaks at 300, 470, 700, 815 and 930° respectively. This system is feebly paramagnetic and retains this property up to 930°. Manganese metavanadate undergoes endothermic changes at 240, 280–590, 830 and 880° respectively. This vanadate is paramagnetic and paramagnetism increases appreciably at 590° and remains constant up 830°. Silver orthovanadate exhibits three endothermic changes at 180, 455 and 640°, respectively.

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Abstract  

Absorption and translocation of acetochlor /2-chloro-N/2-ethyl-6-methylphenyl/-N-/ethoxymenthyl/acetamide/ herbicide were followed in experiments with tolerant corn /Zea mays L./ and sensitive wheat /Triticum aestivum L./ plants by using carbonyl-14C labelled compound. Tolerant plant species absorbed more radioactivity from the nutrient solution than susceptible plant species. However, the root-absorbed radioactivity was translocated to the shoot more readily in the sensitive plants.

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rate was maintained at 10 °C min −1 . The total weight loss studies of the samples were also carried out at a predetermined temperature. The Curie temperature was measured from the variation of alternating current susceptibility as a function of

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with Cu Kα radiation and Ni filter was used to get the structural information of the decomposed product. The variation of AC susceptibility as a function of temperature [ 24 ] was used to find out the Curie temperature of the ‘as-prepared oxide

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Conductivity Bridge CM-82T. The cell constant of the conductivity cell was 0.4530 cm −1 . Magnetic susceptibility measurements for the complexes were made on finally powdered samples using Gouy method. Magnetic susceptibilities of the samples were also measured

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antibiotic susceptibility testing are often labour-intensive and time-consuming (results mostly obtained after 24 h). Recently developed DNA-based tests detect MRSA are more rapid, however, they are more costly [ 1 ]. A novel culture-based screening test for

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2 bands are assigned to the intrinsic vibration of the tetrahedral and octahedral groups. The Curie temperature of the cobalt nickel ferrite was determined by a.c. susceptibility measurements and it was found to be 753 K ( Fig. 5

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