Properties of Some Common Newfoundland Forest Soils and their Relation to Forest Growth

1971 ◽  
Vol 1 (3) ◽  
pp. 174-192 ◽  
Author(s):  
G. Page
Keyword(s):  
Black Spruce ◽  
Chemical Properties ◽  
Forest Growth ◽  
Nutrient Cycle ◽  
Spruce Stands ◽  
The Common ◽  
Physical And Chemical ◽  
Avalon Peninsula ◽  
Severe Disturbance ◽  
And Chemical Properties

The morphological, physical, and chemical properties of nine, important, broadly defined Newfoundland forest soil types are described in this paper. The soils of the Avalon Peninsula are generally stonier, more compacted, and richer in silt and clay than those of western Newfoundland. Gleysols and gleyed podzols are the common soils on the Avalon Peninsula whereas orthic and peaty podzols are the common soils in western Newfoundland. In both sample areas the growth of balsam fir and black spruce stands is best on brunisols and poorest on gleysols and deep peats. Only a very small proportion of the total nutrient supply in the various soils is in an available form, but amounts are considered adequate to maintain the nutrient cycle and its associated forest growth at their present levels more or less indefinitely, provided there is no severe disturbance involving the permanent removal of some of the available nutrients. To achieve lasting increases in forest productivity it will be necessary to increase the rate of nutrient cycling by appropriate cultural treatments.

Salting-out and salting-in experiments with lignosulfonates (LSs)

Holzforschung ◽  
2013 ◽  
Vol 67 (5) ◽  
pp. 549-557 ◽  
Author(s):  
Bernt O. Myrvold
Keyword(s):  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Salting Out ◽  
Practical Applications ◽  
Common Ion ◽  
The Common ◽  
Common Ion Effect ◽  
The Stability ◽  
Physical And Chemical ◽  
And Chemical Properties

Abstract The solubility of lignosulfonates (LSs) in water is strongly dependent on other ions present in the water phase. The differences in the solubility might strongly influence the measurements of the physical and chemical properties of the LS molecules. A reduced solubility of the LS might also affect its utility in many practical applications. The understanding of the interaction between LSs and various salts is important for both practical and theoretical reasons. Therefore, the effect of salt concentrations on the LS has been investigated for 41 different salts with 14 different cations and 16 different anions. The observations cannot be explained by the common ion effect or the screening effects. On the contrary, it was found that the stability of LS solutions follows the Hofmeister series, with the exception of those ions that will chemically interact with the LS molecule. Moreover, the positions of phosphate (HPO42-) and sulfate (SO42-) ions were reversed.

scholarly journals Comparative Analysis of Structure and Properties of Stereoscopic Cocoon and Flat Cocoon

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Bin Zhou ◽  
Huiling Wang ◽  
Hongtao Zhou ◽  
Ke Wang ◽  
Shudong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Morphological Structure ◽  
Variable Structure ◽  
Fiber Fineness ◽  
The Common ◽  
Physical And Chemical ◽  
Structure And Functions ◽  
And Chemical Properties

Abstract Cocoon is a kind of natural biopolymer material with reasonable structure and various functions. However, its structure and functions are often destroyed in practical application. In this study, we took common Bombyx Mori as the research object, and provided different cocooning sites for single or multiple silkworms to construct common stereoscopic cocoons (“normal cocoons” [NC]) and flat cocoons (“single-silkworm flat cocoons” [SFC] and “multi-silkworm flat cocoons” [MFC]), respectively, and compared the morphological structure and basic properties of these cocoons. The study found that the flat cocoons have similar multi-layered variable structure and characteristics compared to those of the common cocoons; also, morphological characteristics and physical and chemical properties of silk fiber from outer layer to inner layer, such as sericin content, fiber fineness, and change rule of basic mechanical properties, are completely consistent with those of the common cocoons. It can be considered that the flat cocoons are constructed by silkworms in the same “procedural” process as that of common cocoons. Due to the expansion of cocooning space, the mechanical properties of fibers are significantly improved. By controlling the size of the cocooning space or the quantity of silkworms cocooning simultaneously, and the time of spinning, a cocoon material with controllable thickness, weight per square meter, porosity, and number of cocoon layers can be obtained as a composite material for direct application.

scholarly journals Comparative Analysis of the Physical and Chemical Properties of Uzbekistan's Basalts and Ways of Solutions to the Problems of Choice of Raw Processing Directions

Land Science ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. p59
Author(s):  
Nurmatov J. T. ◽  
Kurbanov A. A. ◽  
Rashidova R. K.
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Test Report ◽  
The Future ◽  
The Common ◽  
Physical And Chemical ◽  
And Chemical Properties

This article highlights the common use of petrographic processes in basalt processing. At present, basalt is being processed by liquefaction only. Heat fibers, tiles, cement, fittings, and nets are taken from the basalt. For this reason this article states that the range of products to be purchased is small. And to increase the assortment, it is proved by the fact that basalt basin should not be confined to liquefied processing. Chemical composition of basalt. Depending on the chemical composition of the basalt, the technology of their processing is selected and determined. The article is based on the same principle that the dry method of drying basalt without liquefaction is put forward. Below are the names of products that can be obtained on dry bases processing. This is justified by the fact that it increases the range of basalt products. However, it is advisable to follow two methods of basalt processing in the future. These methods, which are recommended by the authors, have undergone a production trial and received positive assessments; the test report has also been presented.

The Common but Complicated Tool: Review of Embolic Materials for the Interventional Radiologist

2021 ◽  
Vol 38 (05) ◽  
pp. 535-541
Author(s):  
Shamar Young ◽  
Nassir Rostambeigi ◽  
Jafar Golzarian
Keyword(s):  
Interventional Radiology ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Interventional Radiologist ◽  
Embolic Agents ◽  
The Common ◽  
Embolic Materials ◽  
Physical And Chemical ◽  
And Chemical Properties

AbstractEmbolization is an important and widely utilized technique in interventional radiology. There are a variety of different categories and individual products which can be utilized to perform embolization. Understanding the different classes of embolic agents, the important features of each of these classes including strengths and limitations, and the variation in individual products within the classes is critical for interventional radiologist to practice safely and effectively. This article reviews the different kinds of embolics and relays some of the pertinent physical and chemical properties of individual products which should be considered when determining which embolic to select for a given purpose.

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.

Tailoring microstructures of materials through biomimetics

1993 ◽  
Vol 51 ◽  
pp. 500-501
Author(s):  
Mehmet Sarikaya ◽  
Ilhan A. Aksay
Keyword(s):  
Chemical Properties ◽  
Design And Synthesis ◽  
Structure Sensitive ◽  
Macro Scale ◽  
Methods Of Synthesis ◽  
Successive Level ◽  
Engineering Materials ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Synthesis Of Materials

Biomimetics involves investigation of structure, function, and methods of synthesis of biological composite materials. The goal is to apply this information to the design and synthesis of materials for engineering applications.Properties of engineering materials are structure sensitive through the whole spectrum of dimensions from nanometer to macro scale. The goal in designing and processing of technological materials, therefore, is to control microstructural evolution at each of these dimensions so as to achieve predictable physical and chemical properties. Control at each successive level of dimension, however, is a major challenge as is the retention of integrity between successive levels. Engineering materials are rarely fabricated to achieve more than a few of the desired properties and the synthesis techniques usually involve high temperature or low pressure conditions that are energy inefficient and environmentally damaging.In contrast to human-made materials, organisms synthesize composites whose intricate structures are more controlled at each scale and hierarchical order.

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.

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