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Investigations on tensile load-carrying ability of reed stems

100%

Kowalski W.

Acta Scientiarum Polonorum. Architectura

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2016

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tom 15

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nr 4

The investigations on mechanical properties of reed stems face numerous difficulties, because of their anisotropy, heterogeneity, shell-like structure, small lateral dimensions of stems and huge diversity of species and habitats of origination. Aware of all difficulties to cope with, the basic experiment has been conducted, that is the uni-axial tension test for reed stems, with- and without joints. The strain-stress relation, at tension, displayed an exponential character, showing material stiffening with the growth of strain. Test results incline to conclusion, that stem-pieces without joints are equally stiff as pieces with joints, however, they are twice as strong as the latter. It means, that joints can be perceived as fragile (in the sense: “brittle”) discontinuity in structure of reed stems. The results of the test have been put through critical estimate and analysis tending to statistical modelling of the load-carrying ability of reed stems.

2

Design of a snap connector to connect panel elements

75%

Matwiej L., Klos R., Bonowski M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2019

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tom 108

3

Zugfestigkeit des Holzes

75%

Matejak M., Wojcik A.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2013

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tom 83

4

Effect of organic inputs on strength and stability of soil aggregates under rice-wheat rotation

75%

Das B., Chakraborty D., Singh V. K., Aggarwal P., Singh R., Dwivedi B. S.

International Agrophysics

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2014

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tom 28

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nr 2

The study aims to elucidate the impact of organic inputs on strength and structural stability of aggregates in a sandy loam soil. Tensile strength, friability and water stability of aggregates, and the carbon contents in bulk soil and in large macro (>2 mm), small macro (0.25-2 mm), micro (0.053-0.25 mm) and silt+clay size (<0.053) aggregates were evaluated in soils from a long-term experiment with rice-wheat rotation at Modipuram, India, with different sources and amounts of organic C inputs as partial substitution of N fertilizer. Addition of organic substrates significantly improved soil organic C contents, but the type and source of inputs had different impacts. Tensile strength of aggregates decreased and friability increased through organic inputs, with a maximum effect under green gram residue (rice)-farmyard manure (wheat) substitution. Higher macroaggregates in the crop residue- and farmyard manure-treated soils resulted in a higher aggregate mean weight diameter, which also had higher soil organic C contents. The bulk soil organic C had a strong relation with the mean weight diameter of aggregates, but the soil organic C content in all aggregate fractions was not necessarily effective for aggregate stability. The soil organic C content in large macroaggregates (2-8 mm) had a significant positive effect on aggregate stability, although a reverse effect was observed for aggregates <0.25 mm. Partial substitution of nitrogen by organic substrates improved aggregate properties and the soil organic C content in bulk soil and aggregate fractions, although the relative effect varied with the source and amount of the organic inputs.

5

Model skurczu okrywy oraz analiza naprężeń podczas suszenia nasion roślin strączkowych

75%

Dobrzański B.

Acta Agrophysica

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2001

|

tom 58

6

Tensile strength and relaxation of tomato skin by a loop technique

75%

Rajabipour A., Zariefard M. R., Dodd G. T., Norris E. R.

International Agrophysics

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2004

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tom 18

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nr 2

7

Soil tensile strength as affected by time, water content and bulk density

75%

Blazejczak D., Horn R., Pytka J.

International Agrophysics

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1995

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tom 09

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nr 3

8

Influence of resin coating on strength and tensile deformation of beech veneer

63%

Slabejova G., Smidriakova M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2013

|

tom 84

9

The influence of densification time on the tensile strength and modulus of elasticity of birch veneers

63%

Slupecki A., Wronka A.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2022

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tom 118

10

Untersuchungen zur Verbesserung der Zugscherfestigkeit von 1K PUR in Holzverbindungen im feuchten Zustand

63%

Niemz P., Klausler O., Schlegel S.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

|

tom 85

11

Wpływ udziału włókien drzewnych na właściwości mechaniczne płyt wiórowych

63%

Auriga R., Mistal B., Mitura S., Molendowski R.

Biuletyn Informacyjny Ośrodka Badawczo-Rozwojowego Przemysłu Płyt Drewnopochodnych w Czarnej Wodzie

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2018

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tom 59

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nr 3-4

12

Picking force of saffron flower and shear strength of saffron stalk

63%

Hassan-Beygi S. R., Ghozhdi H. V., Khazaei J.

Electronic Journal of Polish Agricultural Universities. Series Agricultural Engineering

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2010

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tom 13

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nr 1

13

The impact of crosshead speed on the strength of spruce wood (Picea abies L.)

63%

Dobrowolska E., Lichaczewska B., Pinchevska O.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2020

|

tom 109

14

Leaf architecture, lignification, and tensile strength during vegetative phase change in Zea mays

63%

Balsamo R. A., Orkwiszewski J. A. J.

Acta Societatis Botanicorum Poloniae

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2008

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tom 77

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nr 3

181-188

Background and Aims: Leaf morphology, anatomy, degree of lignification, and tensile strength were studied during vegetative phase change in an inbred line of Zea mays (OH43 x W23) to determine factors that influence mechanical properties during development. Methods: Tensometer, light microscopy, histochemistry. Key results: Mature leaf length increased linearly with plant development, peaked at leaves 7 and 8 (corresponding to the onset of the adult phase) and then declined. Leaf width was stable for leaves 1 through 3, increased to leaf 7, remained stable to leaf 10, and then declined through leaf 13. Lamina thickness was highest for leaf 1 and decreased throughout development. Leaf failure load to width ratio and failure load to thickness ratio increased with development suggesting that changes in leaf morphology during development do not entirely account for increases in failure load. Histochemical analyses revealed that leaf tensile strength correlates with percent lignification and the onset of anatomical adult features at various developmental stages. Conclusions: These data demonstrate that in Zea mays lignification of the midrib parenchyma and epidermis may be directly correlated with increased tensile strength associated with phase change from juvenility to adulthood. Failure load and resultant tensile strength values are primarily determined by the percent tissue lignification and the appearance of leaf architectural characters that are associated with the transition from the juvenile to the adult phase. Increased mechanical stability that occurs during the phase transition from juvenility to adulthood may signify a fundamental change in strategy for an individual plant from rapid growth (survival) to reproduction.

15

Tension stiffness and strength of the ABS prototypes printed on the 3D fused deposition modeling printer

63%

Polubicki B., Grzanka M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2012

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tom 79

16

Properties of modified veneers for 3D - forming

63%

Slabejova G., Smidriakova M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2013

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tom 81

17

Mikroskopowa weryfikacja mechanizmu uszkodzeń liścieni nasion soczewicy i soi

63%

Dobrzański B., Szot B. B.

Acta Agrophysica

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2001

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tom 58

18

Use of glyoxal in starch based sizing mixture for surface modification of paper

63%

Akin A. E., Canbolat D., Ondaral S.

Drewno. Prace Naukowe. Doniesienia. Komunikaty

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2023

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tom 66

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nr 211

19

Selected biometric and mechanical properties of the common reed Phragmites australis and the reed sweet grass Glyceria maxima rhizomes

63%

Kowalik W., Pachuta K., Jeznach J.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2016

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tom 48

|

nr 4

20

Energetic effects predictions by using new fracture mechanics approach

51%

Hlaskova L., Kopecky Z.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

|

2013

|

tom 82

Ograniczanie wyników

Investigations on tensile load-carrying ability of reed stems

Design of a snap connector to connect panel elements

Zugfestigkeit des Holzes

Effect of organic inputs on strength and stability of soil aggregates under rice-wheat rotation

Model skurczu okrywy oraz analiza naprężeń podczas suszenia nasion roślin strączkowych

Tensile strength and relaxation of tomato skin by a loop technique

Soil tensile strength as affected by time, water content and bulk density

Influence of resin coating on strength and tensile deformation of beech veneer

The influence of densification time on the tensile strength and modulus of elasticity of birch veneers

Untersuchungen zur Verbesserung der Zugscherfestigkeit von 1K PUR in Holzverbindungen im feuchten Zustand

Wpływ udziału włókien drzewnych na właściwości mechaniczne płyt wiórowych

Picking force of saffron flower and shear strength of saffron stalk

The impact of crosshead speed on the strength of spruce wood (Picea abies L.)

Leaf architecture, lignification, and tensile strength during vegetative phase change in Zea mays