Seed propagation at low density facilitates the selection of healthy plants to produce seeds with a reduced virus load in a lentil landrace

2015 ◽  
Vol 43 (1) ◽  
pp. 31-39 ◽  
Author(s):  
A. Kargiotidou ◽  
E.K. Chatzivassiliou ◽  
C. Tzantarmas ◽  
I.S. Tokatlidis
Keyword(s):  
Low Density ◽  
Virus Load ◽  
Seed Propagation ◽  
Selection Of

Application of Improved Voltage Compensation in the SEM to Imaging of Organic Materials

1973 ◽  
Vol 31 ◽  
pp. 444-445
Author(s):  
P.J. Killingworth ◽  
M. Warren
Keyword(s):  
Electron Beam ◽  
Organic Materials ◽  
Operating Parameters ◽  
Low Density ◽  
Beam Diameter ◽  
Incident Electron Beam ◽  
Specimen Material ◽  
Voltage Compensation ◽  
Selection Of ◽  
Scanning Electron

Ultimate resolution in the scanning electron microscope is determined not only by the diameter of the incident electron beam, but by interaction of that beam with the specimen material. Generally, while minimum beam diameter diminishes with increasing voltage, due to the reduced effect of aberration component and magnetic interference, the excited volume within the sample increases with electron energy. Thus, for any given material and imaging signal, there is an optimum volt age to achieve best resolution.In the case of organic materials, which are in general of low density and electric ally non-conducting; and may in addition be susceptible to radiation and heat damage, the selection of correct operating parameters is extremely critical and is achiev ed by interative adjustment.

INFLUENCE OF METHODS FOR SELECTION OF PLANTS AND WAYS OF SEEDING ON EFFICIENCY OF ORIGINAL SEEDS OF FLAX-DOLGUNETS GRROWING IN PRIMARY SEED BREEDING

2020 ◽  
Keyword(s):  
Seed Yield ◽  
Control Level ◽  
Row Spacing ◽  
High Germination ◽  
Breeding Efficiency ◽  
Flax Seeds ◽  
Narrow Row ◽  
Seed Propagation ◽  
Selection Of

The results of scientific research are presented, which made it possible to develop less labor-intensive methods for selecting flax plants to grow original (updated) seeds. Studies have shown that a positive selection of tall plants of flax, compared with the accepted counterpart (control), increased seed yield 1.7-1.9 times. Moreover, plant homogeneity according to the main characteristics (height and fiber content in the stem) characterizing the varietal quality of grown seeds turned out to be at the control level. A negative selection, involving the removal of atypical plants, provided an increase in the output volume of seeds compared to the control by 3.9-4.1 times. This selection method did not reduce the varietal quality of seed material compared to the accepted analogue. With both selection methods, after combining typical plants, seeds with the same high germination rates were obtained (96-99 %). The breeding efficiency of the grown flax seeds using narrow-row sowing methods is shown. Studies have established that narrow-row sowing of seeds with a row-spacing of 7.5 and 6.25 cm compared with sowing by a wide-row method significantly increased their yield by 2.8-3.0 and 2.3-3.0 kg / ha, respectively. The greatest influence on the formation of seed yield in narrow-row sowing (6.25 cm) was exerted by the method of sowing, the part of which was 76.1 %. As the length of seed propagation of flax in creased (up to the uterine elite 2 years) in narrow-row sowing (6.25 cm) compared to broad-row, there was no decrease in quality indicators - germination and seed strength.

scholarly journals The changes of LD-PE films after exposure in different media

2020 ◽  
Vol 26 (4) ◽  
pp. 185-189
Author(s):  
Tatiana Kojnoková ◽  
Lenka Markovičová ◽  
František Nový
Keyword(s):  
Water Absorption ◽  
Melting Temperature ◽  
Aggressive Medium ◽  
Polyethylene Film ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Experimental Part ◽  
Effective Application ◽  
Suitable Medium ◽  
Selection Of

AbstractThis work deals with the study of polymers, and, in particular, polyethylene; its production, types, properties, and usage. The experimental part evaluates the changes of properties of the polyethylene film to be reused under various exposure conditions and selection of the most suitable medium for its application. The film made of low-density polyethylene (LD-PE) was influenced by aggressive media with different pH, specifically Savo for the disinfection, Savo as a Saponate for dish washing and Coca-Cola. On LD-PE films the water absorption and melting temperature evaluation tests were performed. Carried out tests show that the most aggressive medium for LD-PE film from used media is Coca-Cola. The most effective application of LD-PE film like wrapping on container transported is the Savo used as a Saponate for dish washing.

A Selection of Grapes

2018 ◽  
Author(s):  
David R. Dalton
Keyword(s):  
Low Density ◽  
Ether Extract ◽  
Cinnamic Acids ◽  
La Mancha ◽  
Polar Materials ◽  
The World ◽  
Drought Resistant ◽  
Mass Spectrometric Techniques ◽  
Ether Phase ◽  
Selection Of

This undistinguished, productive, drought resistant, vigorous white grape, Airén, from the La Mancha region of Spain, was said to be the most widely planted grape in the world. In part the justification for this claim relies upon the observation that it is planted at a very low density! Except for its use in blending to make other wines “lighter,” it has not found wide accep¬tance. In part, it appears that its lack of popularity is the result of what is reported to be a mild, neutral flavor, and advertising has not pushed wines produced from it to the fore. Although it is now common to attempt to analyze the headspace (or ullage) in bottled wine (as well as the wine itself ) by chromatographic and mass spectrometric techniques it is less common to find that the grapes (skin, must, and seeds) are also subjected to such analysis. Nonetheless, the phenolic composition of V. vinifera var Airén was subjected to just such analysis during ripening from véraison to “technological” maturity (i.e., maturity which might actually be earlier than harvest, the latter being the decision of the viticulturist and vintner). The analysis of the ethyl ether extract of macerated skins, seeds, and accumulated solids (the pomace) was undertaken. Procyanidins and anthocyanins which would (the authors claim) interfere with subsequent analysis would not move into the ether phase. It was also found (using controls) that other highly polar materials (e.g., carboxylic acids) were only poorly extracted from the macerated skins and seeds. The isolated compounds and some information about their sources are provided in Figures 14.1 and 14.2. The analysis of the seeds, skin, and must did lead to the conclusion that “the maximum concentrations of benzoic and cinnamic acids and aldehydes and flavonol aglycones and glycosides at the end of the ripening period did not coincide with the minimum concentrations of the flavan-3-ols and hydroxycinnamic tartaric esters.” Depending upon what was sought, this information might thus affect decisions concerning the harvest date.

scholarly journals First-Principles Design of Refractory High Entropy Alloy VMoNbTaW

Entropy ◽  
2018 ◽  
Vol 20 (12) ◽  
pp. 965 ◽  
Author(s):  
Shumin Zheng ◽  
Shaoqing Wang
Keyword(s):  
Elastic Properties ◽  
First Principles ◽  
High Entropy Alloy ◽  
Low Density ◽  
High Entropy ◽  
System A ◽  
Small Influence ◽  
High Concentrations ◽  
General Guidance ◽  
Selection Of

The elastic properties of seventy different compositions were calculated to optimize the composition of a V–Mo–Nb–Ta–W system. A new model called maximum entropy approach (MaxEnt) was adopted. The influence of each element was discussed. Molybdenum (Mo) and tungsten (W) are key elements for the maintenance of elastic properties. The V–Mo–Nb–Ta–W system has relatively high values of C44, bulk modulus (B), shear modulus (G), and Young’s modulus (E), with high concentrations of Mo + W. Element W is brittle and has high density. Thus, low-density Mo can substitute part of W. Vanadium (V) has low density and plays an important role in decreasing the brittleness of the V–Mo–Nb–Ta–W system. Niobium (Nb) and tantalum (Ta) have relatively small influence on elastic properties. Furthermore, the calculated results can be used as a general guidance for the selection of a V–Mo–Nb–Ta–W system.

scholarly journals Strategies for within-litter selection of piglets using ultra-low density SNP panels

2019 ◽  
Vol 220 ◽  
pp. 173-179
Author(s):  
Valdecy Aparecida Rocha da Cruz ◽  
Luiz F. Brito ◽  
Flávio S. Schenkel ◽  
Hinayah Rojas de Oliveira ◽  
Mohsen Jafarikia ◽  
...  
Keyword(s):  
Low Density ◽  
Snp Panels ◽  
Selection Of

scholarly journals Comparing strategies for selection of low-density SNPs for imputation-mediated genomic prediction in U. S. Holsteins

Genetica ◽  
2017 ◽  
Vol 146 (2) ◽  
pp. 137-149 ◽  
Author(s):  
Jun He ◽  
Jiaqi Xu ◽  
Xiao-Lin Wu ◽  
Stewart Bauck ◽  
Jungjae Lee ◽  
...  
Keyword(s):  
Genomic Prediction ◽  
Low Density ◽  
Selection Of

scholarly journals Extrusion Dwell Time and Its Effect on the Mechanical and Thermal Properties of Pitch/LLDPE Blend Fibres

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1520
Author(s):  
Salem Mohammed Aldosari ◽  
Sameer Rahatekar
Keyword(s):  
Tensile Strength ◽  
Dwell Time ◽  
Low Density Polyethylene ◽  
Mechanical And Thermal Properties ◽  
Low Density ◽  
Carbon Fibres ◽  
Linear Low Density Polyethylene ◽  
New Generation ◽  
Thermal Stability Of ◽  
Selection Of

Mesophase pitch-based carbon fibres have excellent resistance to plastic deformation (up to 840 GPa); however, they have very low strain to failure (0.3) and are considered brittle. Hence, the development of pitch fibre precursors able to be plastically deformed without fracture is important. We have previously, successfully developed pitch-based precursor fibres with high ductility (low brittleness) by blending pitch and linear low-density polyethylene. Here, we extend our research to study how the extrusion dwell time (0, 6, 8, and 10 min) affects the physical properties (microstructure) of blend fibres. Scanning electron microscopy of the microstructure showed that by increasing the extrusion dwell from 0 to 10 min the pitch and polyethylene components were more uniformly dispersed. The tensile strength, modulus of elasticity, and strain at failure for the extruded fibres for different dwell times were measured. Increased dwell time resulted in an increase in strain to failure but reduced the ultimate tensile strength. Thermogravimetric analysis was used to investigate if increased dwell time improved the thermal stability of the samples. This study presents a useful guide to help with the selection of mixes of linear low-density polyethylene/pitch blend, with an appropriate extrusion dwell time to help develop a new generation of potential precursors for pitch-based carbon fibres.

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