scholarly journals Modern edaphic conditions of ravine oak forest growing in the south Voronezh region

2017 ◽  
Vol 6 (4) ◽  
pp. 54-61
Author(s):  
Девятова ◽  
Tat'yana Devyatova ◽  
Алаева ◽  
Liliya Alaeva ◽  
Аносова ◽  
...  
Keyword(s):  
Forest Ecosystems ◽  
Chemical Properties ◽  
Practical Significance ◽  
Physical And Chemical Properties ◽  
Standard Methods ◽  
Edaphic Conditions ◽  
Voronezh Region ◽  
Aggregate Composition ◽  
Physical And Chemical ◽  
And Chemical Properties

We studied morphological features of the structure of the profile of forest soils, their structural-aggregate composition, chemical, physical and chemical properties using standard methods. The differ-ences in the studied parameters depending on the position in the relief are defined. Research are pre-sented, which has high scientific and practical significance for studying the conditions of growth, spatial distribution, productivity, features of functioning of natural forest ecosystems and improving and detailing taxonomic position of soils of gulley and ravine complex.

scholarly journals Physical and Chemical Properties of Primers with Functional Additive Based on Carbon Nanotubes

2019 ◽  
pp. 48-53
Author(s):  
Sergey Boroznin ◽  
Yuliya Dvuzhilova ◽  
Natalya Boroznina ◽  
Ilya Dvuzhilov ◽  
Irina Zaporotskova
Keyword(s):  
Carbon Nanotubes ◽  
Mechanical Characteristics ◽  
Chemical Properties ◽  
Practical Significance ◽  
Physical And Chemical Properties ◽  
Drying Time ◽  
Functional Additive ◽  
The Creation ◽  
Physical And Chemical ◽  
And Chemical Properties

Carbon nanotubes are structures where, due to their ideal structure, there is no electron scattering on defects in the crystal structure, so that they have high conductivity and low heat release during the passage of current. Thus, carbon nanotubes that conduct heat well are a material that can be used to achieve high thermal insulation properties. The exceptional physical and mechanical properties of carbon nanotubes make it possible to use them as nanofillers in order to obtain new materials with predictable properties and characteristics. Due to their structure and geometry, CNTS have unique mechanical, sorption and other properties. The unique structure of CNTS provides them with high surface activity, because of which they are widely used as fillers and functional additives. Modification of the material by nanotubes can lead to a significant improvement in the physical and mechanical characteristics of the original systems, as well as to an increase in their energy – saving properties. To date, the creation of composite materials based on carbon nanotubes is one of the most pressing issues, and the study of physical, chemical and mechanical characteristics of nanocomposites remains relevant, has scientific and practical significance, since the creation of such materials opens up great opportunities for their use in various fields of industry. In this work the influence of carbon nanotubes on some physical and chemical properties of GF-021 applied on various surfaces, such as brick, wood, gypsum board been, investigated. The results of the experiments show that the functional additive based on carbon nanotubes favorably influences such properties of the GF-021 primer as the drying time and stability to the static action of a 3 % solution of sodium chloride.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

On the physical and chemical properties of the milk of the Japanese Polled breed of cattle

1952 ◽  
Vol 23 (3) ◽  
pp. 102-106
Author(s):  
HEISHIRO TSUCHIYA ◽  
SAKURO YARATA
Keyword(s):  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties
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