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Article
Characterization of nanomagnetites co-precipitated in inert gas atmosphere for plant nutrition
Iron-oxide nanoparticles were prepared by chemical coprecipitation method in inert gas atmosphere and also in air atmosphere in order to use them as possible nutrition source for plants. The samples were chara...
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Article
Iron oxide nanoparticles for plant nutrition? A preliminary Mössbauer study
One of the most important micronutrients for plants is iron. We have prepared iron(III) oxyhydroxide and magnetite nanoparticles with the aim to use them as possible nutrition source for plants. The iron(III)-...
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Article
Covering the sphere by equal zones
A zone of half-width w on the unit sphere S 2 in Euclidean 3-space is the parallel domain of radius w of a great circle. L. Fejes Tóth raised the following question in [6]: what is the min...
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Article
On the angle sum of lines
What is the maximum of the sum of the pairwise (non-obtuse) angles formed by n lines in the Euclidean 3-space? This question was posed by Fejes Tóth in (Acta Math Acad Sci Hung 10:13–19, 1959). Fejes Tóth solved ...
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Article
The Packing Density of the \(n\) -Dimensional Cross-Polytope
The packing density of the regular cross-polytope in Euclidean \(n\) n ...
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Article
Dowker-type theorems for hyperconvex discs
A hyperconvex disc of radius \(r\) r ...
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Article
Colourful and Fractional (p,q)-theorems
Let p≥q≥d+1 be positive integers and let \({\mathcal{F}}\) be a finite family of convex sets in
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Article
Separation in totally-sewn 4-polytopes with the decreasing universal edge property
The separation number s(O, P) of a d-polytope with respect to a point O in the interior of P is the minimum number of hyperplanes necessary to strictly separate O from any facet of P. According to the Separation ...
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Article
Open AccessCd-Fe interactions: Comparison of the Effects of Iron Deficiency and Cadmium on Growth and Photosynthetic Performance in Poplar
To check the importance of Cd-induced iron deficiency in Cd stress, symptoms of Cd stress were compared with those of iron deficiency or the combination of these two stresses. Poplar plants grown in hydroponic...
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Chapter and Conference Paper
Mössbauer investigation of iron uptake in wheat
Iron uptake and distribution in wheat roots were studied with 57Fe Mössbauer spectroscopy. Plants were grown both in iron sufficient and in iron deficient nutrient solutions. Mössbauer spectra of the frozen iron ...
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Article
Foreword
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Dedication
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Article
Intuitive Geometry Workshop and Intuitive Geometry Day in Calgary (August 31, 2007–September 3, 2007)
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Article
The T(4) property of families of unit disks
For a family \( \mathcal{F} \) of n mutually disjoint unit disks in the plane, we show that if any four disks are int...
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Article
Mössbauer investigation of iron uptake in wheat
Iron uptake and distribution in wheat roots were studied with 57Fe Mössbauer spectroscopy. Plants were grown both in iron sufficient and in iron deficient nutrient solutions. Mössbauer spectra of the frozen iron ...
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Chapter and Conference Paper
Mössbauer study of iron uptake in cucumber root
57Fe Mössbauer spectroscopy was used to study the uptake and distribution of iron in the root of cucumber plants grown in iron-deficient modified Hoagland nutrient solution and put into iron-co...
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Article
A Helly-type transversal theorem for n-dimensional unit balls
Let \( \mathcal{F} \) be a family of unit balls in ...
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Article
Mössbauer study of iron uptake in cucumber root
57Fe Mössbauer spectroscopy was used to study the uptake and distribution of iron in the root of cucumber plants grown in iron-deficient modified Hoagland nutrient solution and put into i...
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Article
Large transversals to small families of unit disks
It is proved that if the nonempty intersection of bounded closed convex sets <Emphasis Type=”Italic”>A</Emphasis>n<Emphasis Type=”Italic”>B</Emphasis> is contained in (<Emphasis Type=”Italic”>A </Emphasis>+<Em...
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Article
Mercury Inhibits the Activity of the NADPH:Protochlorophyllide Oxidoreductase (POR)
The effect of Hg++ was studied on the arrangement and photoactivity of NADPH:protochlorophyllide oxidoreductase (POR) in homogenates of dark-grown wheat (Triticum aestivum L.) leaves. 77 K fluorescence emission s...
