EXPERIENCE OF PLANTING LARGE SIZE CONIFEROUS WOODY SPECIES IN THE SPRING-SUMMER PERIOD ON THE KOLA NORTH

2021 ◽  
Vol 21 (3) ◽  
pp. 57-70
Author(s):  
E.A. Svyatkovskaya ◽  
◽  
N.V. Saltan ◽  
E.P. Rybalka ◽  
N.N. Trostenyuk ◽  
...  
Keyword(s):  
Root System ◽  
Picea Glauca ◽  
Polar Region ◽  
Woody Species ◽  
Larix Sibirica ◽  
Morphometric Parameters ◽  
Summer Period ◽  
Large Size ◽  
Urban Conditions

The first experience of transplanting large-sized coniferous dendrointroducents (Picea glauca (Moench) Voss, Larix sibirica Ledeb.) in the spring-summer period without preliminary prepara-tion of the root system in the urban conditions of the Polar region was presented. Four specimens of middle-aged plants of both species were selected. The transplant was carried out with the max-imum use of mechanized equipment, which ensures good preservation of the lump and the tree it-self. There were four mutually related stages of work (preparatory, digging out plants, transporta-tion, planting), the quality of which depends on the success of plant survival. A brief description of the decorative qualities, morphometric parameters and the state of the experimental plants has been given. It has shown that due to the peculiarities of the soil and the location of the root system in coniferous introduced species, a clod of earth should be at least 60 cm thick, with a diameter of 110 to 130 cm. The main agrotechnical methods for the creation and care of plantings from large-sized plants were given.

scholarly journals Synergistic effect of benzolinone with IBA and fungicides on the vegetative propagation of ornamental plants, park, and fruit woody species

2012 ◽  
Vol 29 (No. 2) ◽  
pp. 41-50 ◽  
Author(s):  
M. Henselová
Keyword(s):  
Root System ◽  
Root Formation ◽  
Ornamental Plants ◽  
Woody Species ◽  
Fruit Trees ◽  
Indole Butyric Acid ◽  
Rooted Cuttings ◽  
Actinidia Arguta ◽  
Allochthonous Species

  A study was made of the stimulating effect of benzolinone (3-benzyloxycarbonyl-methyl)-2-benzothiazolinone in powder form (P) and its mixture with indole butyric acid (IBA), the biofungicide Supresivit and fungicide Captan 50 WP on the root formation of 17 species of ornamental plants, park and fruit woody species. Under the action of benzolinone, the yield of rooted cuttings in the category of ornamental plants amounted to 44.5% (in the Dianthus sp.) up to 83.7% (in Rosa canina), in the category of park woody species it was from l6.7 (in Magnolia stellata) to 100% (in Forsythia intermedia). In fruit trees represented by two species, viz. Actinidia arguta and cherry rootstocks, the yield was between 20 and 86.7%, and in two allochthonous species Cotoneaster horizontalis and Philadelphus coronarius it was from 96.7 to 100% in rooted cuttings. In the case of herbaceous and semi-lignified cuttings, lower concentrations of benzolinone below 0.1% were more effective, while on the contrary, higher concentrations of 0.1–0.2% proved more effective with lignified cuttings. In the species with difficult root formation, such as Magnolia stellata, Viburnum farreri and Actinidia arguta, benzolinone demonstrably stimulated both the rhizogenesis, and thereby the overall yield of rooted cuttings, and the quality of the root system. In the case of the species with naturally high rooting ability, the positive effect of benzolinone was manifest mainly in the quality of the root system. The synergistic action of the above stimulants on root formation was achieved in two and three-component benzolinone mixtures with IBA and fungicides on the basis of the active ingredients captan and Trichoderma harzianum. The most evident stimulating effects on the rooting of cuttings in Dianthus sp., Ficus schlechteri and the deciduous species Acer saccharinum Pyramidale, Prunus padus Colorata and Prunus kurilensis Brilliant was obtained in three-component mixtures.

scholarly journals The composition and state of native and introduced woody species in the zone of railway transport influence in the Kola Polar region

2020 ◽  
Vol 9 (2) ◽  
pp. 109-114
Author(s):  
Ekaterina A. Sviatkovskaya ◽  
Natalya Vlafimirovna Saltan ◽  
Nadezhda N. Trostenyuk
Keyword(s):  
Polar Region ◽  
Woody Species ◽  
Larix Sibirica ◽  
Railway Stations ◽  
Caragana Arborescens ◽  
Indigenous Trees ◽  
Phosphorus And Potassium ◽  
Malus Baccata ◽  
Padus Avium ◽  
Potassium Exchange

The paper analyzes the state and the diversity of native and introduced woody plants used in landscaping railway stations in 5 cities of the Kola Polar region. The species composition is represented by 22 species, 16 genera, and 9 families. Sorbus gorodkovii (39%) is the most common among trees, Rosa rugosa (44%) is the most common among shrubs. The authors have observed two rare introduced woody species (Larix sibirica Ledeb., Syringa josikaea Jacq. fil.) included in Red Data Books of various ranks. 6 categories of plant state have been identified. Betula pubescens has the largest share of healthy plants among indigenous trees species, Malus baccata and Larix sibirica among introduced species, Rosa pimpinellifolia, Caragana arborescens, Crataegus sanguinea among shrubs in the station territories. Sorbus gorodkovii and Padus avium are in a critical state. The agrochemical soil study showed a low availability of nitrogen compounds and a high content of phosphorus and potassium exchange forms. It has been revealed that the main weakening causes are old age of plants, violation of maintenance technology, and failure to comply with environmental conditions.

scholarly journals Toward a Better Understanding of Metal Nanoparticles, a Novel Strategy from Eucalyptus Plants

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 929
Author(s):  
Hanadi Sawalha ◽  
Rambod Abiri ◽  
Ruzana Sanusi ◽  
Noor Azmi Shaharuddin ◽  
Aida Atiqah Mohd Noor ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Woody Plants ◽  
Woody Species ◽  
Forest Products ◽  
Ideal Candidate ◽  
Promising Tool ◽  
Novel Strategy ◽  
The Ideal

Nanotechnology is a promising tool that has opened the doors of improvement to the quality of human’s lives through its potential in numerous technological aspects. Green chemistry of nanoscale materials (1–100 nm) is as an effective and sustainable strategy to manufacture homogeneous nanoparticles (NPs) with unique properties, thus making the synthesis of green NPs, especially metal nanoparticles (MNPs), the scientist’s core theme. Researchers have tested different organisms to manufacture MNPs and the results of experiments confirmed that plants tend to be the ideal candidate amongst all entities and are suitable to synthesize a wide variety of MNPs. Natural and cultivated Eucalyptus forests are among woody plants used for landscape beautification and as forest products. The present review has been written to reflect the efficacious role of Eucalyptus in the synthesis of MNPs. To better understand this, the route of extracting MNPs from plants, in general, and Eucalyptus, in particular, are discussed. Furthermore, the crucial factors influencing the process of MNP synthesis from Eucalyptus as well as their characterization and recent applications are highlighted. Information gathered in this review is useful to build a basis for new prospective research ideas on how to exploit this woody species in the production of MNPs. Nevertheless, there is a necessity to feed the scientific field with further investigations on wider applications of Eucalyptus-derived MNPs.

Allocating nodes to hubs for minimizing the hubs processing resources: A case study

2019 ◽  
Vol 53 (3) ◽  
pp. 807-827
Author(s):  
Ali Balma ◽  
Mehdi Mrad
Keyword(s):  
Telecommunication Network ◽  
Real Life ◽  
Optimal Solutions ◽  
Total Flow ◽  
Nonlinear Formulation ◽  
Large Size ◽  
Processing Resources ◽  
Reformulation Linearization

This paper addresses the problem of allocating the terminal nodes to the hub nodes in a telecommunication network. Since the flow processing induces some undesirable delay, the objective is to minimize the total flow processed by the hubs. This study focuses on a real life network of the tunisian operator Tunisie Telecom whose operations managers are concerned by the quality of service. We provide three compact formulations that give optimal solutions for networks of large size. In particular, the last two are obtained by applying the Reformulation-Linearization Technique to a nonlinear formulation of the problem. The latter formulation derived within this approach is the most computationally effective, as pointed out by the computational experiments conducted on the real life network of Tunisie Telecom with 110 nodes and 5 hubs. Finally, we discuss and compare between the single allocation and double allocation configurations.

Research on trajectory planning of non-developable surface for automated tape placement processing of composite

2017 ◽  
Vol 24 (6) ◽  
pp. 929-936
Author(s):  
Lin Liu ◽  
Jun Xiao ◽  
Yong Li
Keyword(s):  
Trajectory Planning ◽  
Local Stress ◽  
Developable Surface ◽  
Software Environment ◽  
Quantitative Characterization ◽  
Large Size ◽  
Variable Step ◽  
The Cost ◽  
Wing Panel

AbstractTape placement manufacturing process, as one of the automated forming technologies for composite material, not only substantially improves the productivity of composite component and reduces the cost of production significantly but also raises the reliability and stability of composite structure. Automated tape placement technology is mainly applied for manufacturing the fuselage and wing panel of airplane characterized by small curvature and large size. For these kinds of structural components with a non-developable surface, trajectory planning by “natural path” method could reduce the internal stress and improve the quality of composite products to a certain extent but not be optimized by quantitative characterization. On the basis of preliminary work, the theoretical model of “unnatural degree” (UD) is introduced in the first step, which could characterize the tensile and shear strain of the laying tape quantitatively. Secondly, by adjusting the iterative step and laying direction to diminish the UD, local stress could be softened in order to optimize the laying track. Ultimately, the simulation model of the non-developable surface is established under the Matlab software environment, and the “variable step-angle” algorithm is adopted to verify the adjustment effect of the tape-laying track.

Regional features of the anatomical structure of the root canals of the first molars

MedAlliance ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 96-101
Keyword(s):  
Root System ◽  
Anatomical Structure ◽  
System Structure ◽  
Cone Beam ◽  
Migration Activity ◽  
Root Canals ◽  
Regional Features ◽  
Root System Structure ◽  
Regions Of Russia

Unsatisfactory quality of root canal treatment is one of the most important problems of modern dentistry. One of the reasons is the limited knowledge of dentists about the regional features of the endodontic teeth anatomy, which is becoming particularly relevant in the rise of migration activity of the Russian population. But compared to other countries, there are very few studies and publications in this field in Russia. Objective. Study the features of first molars' root canals' anatomy in patients from different regions of Russia. Materials and methods. 363 cone-beam computed tomography (CBCT) scans of the jaws of patients 26 to 64 years of age, living in Moscow and StPetersburg for at least four generations have been considered. The endodontic anatomy of 347 first molars of the upper and 611 lower jaws was studied. The number of roots and root canals, their structure and shape were determined. Results. Anatomical differences in the structure of the first molars' root canals were established in residents who resided in Moscow and StPetersburg for several generations. Variations in the number of roots and root canals were found in the upper jaw molars. As for the canal-root system of the lower molars, most often they were characterised by different variants of the cross-section and the number of canals in the distal root. Conclusions. The results of the study can be used in practical dentistry, as they allow the dentists of StPetersburg and Moscow to expand the current understanding of the root system structure and the frequency of possible variations in these regions.

Resilience aspects of woody plant species at the passage of fire: case of Quercus coccifera in Tlemcen Mountains (Algeria)

2020 ◽  
Vol 21 (2) ◽  
pp. 119-128
Author(s):  
Asma Rafa ◽  
◽  
Mohamed Berrichi ◽  
Ahmed Haddad ◽  
◽  
...  
Keyword(s):  
Heat Conduction ◽  
Porous Structure ◽  
Root System ◽  
Cross Sections ◽  
Woody Plant ◽  
Secondary Xylem ◽  
Woody Species ◽  
Average Diameter ◽  
Quercus Coccifera ◽  
Pyrolysis Gases

In this study, on the aspects of the resilience of woody species to the passage of fire, we wanted to test the alveolar specificity represented by the size of the pores of the secondary xylem of the root system in Quercus coccifera L., Pore size assessment is based on measuring 100 pores in cross sections, from the roots of 10 shrubs. The aim of this study is to explain how the roots can maintain their vitality after passing a fire and thus guarantee regeneration. In addition to the vigor of the root system of this species, the release of pyrolysis gases and the propagation of heat by conduction are provided by the porosity of the material. The results show that the pores are qualified as “fine” in the initial wood with an average diameter of 83.35 µm. In final wood, they are "very thin" with 42.30 µm in diameter. The absence of oxygen and the less porous structure delay the combustion cycle of the root system, the roots distant from the surface are thus protected from proliferation by heat conduction and thus guarantee regeneration.

scholarly journals Anuran larvae diet from agroecosystem’s ponds: environmental quality and implications for their populations

2016 ◽  
Author(s):  
Selene Babini ◽  
Luciana Cibils Martina ◽  
Elisa Luque ◽  
Noemi Gari ◽  
Nancy Salas ◽  
...  
Keyword(s):  
Environmental Quality ◽  
Native Species ◽  
Morphometric Parameters ◽  
Diet Analysis ◽  
Temporary Ponds ◽  
Nitzschia Palea ◽  
Composition And Structure ◽  
Structural Variables ◽  
Algal Abundance

<p>Agriculture is considered an important factor for the decline of amphibians recorded in the last decades. Intensive agriculture requires the application of great amounts of pesticides and fertilizers, consequently many aquatic habitats have been altered. The over-enrichment of waters with nutrients from agriculture causes growth of algae and cyanobacteria and the shift of the community composition toward the dominance of tolerant taxa. The aim of this study was to analyze the diet of tadpoles and the size of larvae and metamorphs of the native species <em>Rhinella arenarum </em>in agroecosystems of central Argentina. Four sampling sites with different degree of human disturbance were selected, three temporary ponds from agroecosystems (A1, A2, A3), and a pond in a semi-modified landscape, not affected by agriculture or cattle. The sites were visited once a week from October 2013 to January 2014. Tadpoles and metamorphs were captured, anesthetize and preserved. Morphometric parameters were measured on tadpoles and metamorphs and for 20 tadpoles the complete intestine was removed and their contents analyzed. Phosphate values were higher in agroecosystem ponds. Body size and mass of tadpoles and metamorphs were different between sites, being smaller in agricultural ponds. Diet analysis revealed that all larvae mainly consumed microalgae. Larval diets allowed differentiating the sites, larvae from A1 and A3 sites showed a diet with a similar composition and structure (with a predominance of <em>Nitzschia palea</em>), meanwhile larvae from A2 and SM showed different diets. In SM, the larvae mainly consumed <em>Trachelomonas </em>sp. Analysis of structural variables revealed a higher algal abundance in the diet of larvae from A3, a lower richness in SM and that there were no differences between sites in diversity and evenness of diets. Our hypothesis was support in part, given that resistant algae taxa were found in agroecosystem ponds and tadpoles and metamorphs were smaller, but larval diets showed higher abundance and richness. The analysis of the diet of aquatic stages of <em>R. arenarum</em> allowed us to know the trophic availability and environmental quality of temporary ponds from agroecosystems. </p>

a-Si TFT Technologies for AM-LCDS

1994 ◽  
Vol 345 ◽  
Author(s):  
Nobuki Ibaraki
Keyword(s):  
Implantation Technique ◽  
Picture Quality ◽  
Large Area ◽  
Aperture Ratio ◽  
Large Size ◽  
Ion Doping ◽  
Doping Technique ◽  
Future Technologies ◽  
Improved Characteristics

AbstractA technical trend for a-Si TFTs is their application to large-size, high-pixel density AMLCDs such as XGA, EWS, and HDTV. In order to realize these LCDs, the TFT device characteristics must be improved. Future technologies, which will be necessary to fabricate TFTs with improved characteristics are as follows,(1) Fully self-aligned TFT technology: A SA-TFT structure reduces the feedthrough voltage caused by parasitic capacitance due to gate/source overlap. This results in an improved picture quality and a higher aperture ratio. Fabrication of such a structure would require ion doping technology.(2) Ion doping technology: This non-mass-separated implantation technique has large area doping capability and much higher doping speed compared to conventional ion implantation technique. The major problems with the ion doping technique is the implantation of unwanted species which deteriorate the quality of source/drain and channel regions of TFTs.

scholarly journals Growth and Characterization of Epsomite Single Crystals Doped with KCl from low Temperature Aqueous Solutions

1970 ◽  
Vol 33 (1) ◽  
pp. 47-54 ◽  
Author(s):  
S Ferdous ◽  
J Podder
Keyword(s):  
Aqueous Solutions ◽  
Single Crystals ◽  
Optical Quality ◽  
Dielectric Studies ◽  
Slow Cooling ◽  
Large Size ◽  
Isothermal Evaporation ◽  
Academy Of Sciences

Highly transparent and well faceted large size epsomite single crystals have been grown in pure form and doped with KCl from aqueous solutions by slow cooling and isothermal evaporation method. The optical quality of the epsomite improves on doping by KCl. Mass growth rates were found to increase with doping of lower concentrations of KCl and then decreases with the higher concentration of KCl. KCl doped epsomite crystal reveals that structures are slightly distorted due to adsorption of Cl- ion into the crystal lattice. DC conductivity along the growth axis for all of the grown crystals increases with temperature in the range of 25 to 70ºC and also increases with the KCl concentration. Dielectric constant is found to be almost independent of frequency up to range of 106Hz. The dielectric studies show the suitability of these grown crystals for optoelectronic applications. DOI: 10.3329/jbas.v33i1.2949 Journal of Bangladesh Academy of Sciences, Vol. 33, No. 1, 47-54, 2009

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