Specific composition and structure of population phytopathogens of vegetable crops

2019 ◽  
Vol 326 (3) ◽  
pp. 76-78
Author(s):  
V.L. Nalobova ◽  
◽  
N.S. Opimah ◽  
M.V. Nalobova ◽  
I.V. Haponenka ◽  
...  
Keyword(s):  
Vegetable Crops ◽  
Specific Composition ◽  
Composition And Structure ◽  
Structure Of Population

Zooplankton of a mountain river and highland bogs in a wetlands complex in Atacama, an Altiplano desert, in northern Chile

Crustaceana ◽  
2019 ◽  
Vol 92 (4) ◽  
pp. 429-444
Author(s):  
Andrés Muñoz-Pedreros ◽  
Patricio De los Ríos ◽  
Marilyn González-Urrutia
Keyword(s):  
Cluster Analysis ◽  
Quantitative Analysis ◽  
Correlation Matrix ◽  
Northern Chile ◽  
Mountain River ◽  
Qualitative And Quantitative Analysis ◽  
Oxygen Conductivity ◽  
Qualitative And Quantitative ◽  
Specific Composition ◽  
Composition And Structure

Abstract The Atacama is the world’s driest desert. It contains various types of wetlands. In general, the diversity and structure of the zooplankton in these wetlands have been very little studied. The object of the present study was to analyse the specific composition and structure of the zooplankton in a transect which included highland bogs and an endorheic mountain river in the Altiplano of northern Chile. In 2017, samples of zooplankton were collected for qualitative and quantitative analysis in two types of wetlands. Eight taxa of zooplanktonic crustaceans were recorded. The results of null models revealed the absence of regulator patterns for all sites in species co-occurrence. Cluster analysis generated two groups with low similarity between them. The results observed in the correlation matrix showed significant direct associations between some species and the level of dissolved oxygen, conductivity and salinity.

scholarly journals Polychaeta (Annelida) from the continental shelf off Aveiro (NW Portugal): Species composition and community structure

Check List ◽  
2013 ◽  
Vol 9 (3) ◽  
pp. 533 ◽  
Author(s):  
Ascensão Ravara ◽  
Maria Helena Moreira
Keyword(s):  
Community Structure ◽  
Species Composition ◽  
Continental Shelf ◽  
New Records ◽  
Depth Range ◽  
Sediment Distribution ◽  
Polychaete Species ◽  
Nw Portugal ◽  
Specific Composition ◽  
Composition And Structure

The present study provides a checklist of the polychaete fauna collected on the continental shelf off Aveiro (NW Portugal), within an area located between latitudes 40°30’N and 40°50’N and longitudes 8°40’W and 9°20’W, and a depth range of 8 to 185 m. The list includes 136 species, belonging to 37 families, from which 19 are new records for the Portuguese coast (Isolda pulchella, Mesochaetopterus sagittarius, Aphelochaeta multibranchis, Chaetozone cf. vivipara, Diplocirrus hirsutus, Goniadella gracilis, Gyptis mediterranea, Lumbrinerides crassicephala, Eumida bahusiensis, Eumida ockelmanni, Nereiphylla paretti, Phyllodoce rosea, Glyphohesione klatti, Malmgreniella arenicolae, Prionospio aluta, Pseudopolydora paucibranchisata, Pseudopolydora pulchra, Scolelepis mesnili, Polycirrus cf. medusa). The shelf off Aveiro presents a well- defined pattern of sediment distribution, with finer sand on the inner (8–22 m depth) and the outer (94–184 m depth) parts of the shelf and coarser sediments on the mid-shelf. The distribution of polychaete assemblages follows closely the aforementioned sedimentary pattern, showing different specific composition and structure in each of the three areas. Depth was also found to play an important role in the distribution of some polychaete species.

Zooplankton of the highland bogs of Putana, a desert wetland of the high puna, northern Chile

Crustaceana ◽  
2015 ◽  
Vol 88 (10-11) ◽  
pp. 1235-1244 ◽  
Author(s):  
Andrés Muñoz-Pedreros ◽  
Patricio De los Ríos-Escalante ◽  
Patricia Möller
Keyword(s):  
Species Richness ◽  
Northern Chile ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
The Andes ◽  
Specific Composition ◽  
Salt Flats ◽  
Composition And Structure ◽  
North Eastern ◽  
North Western

The Atacama “puna” (high-altitude plateau) is situated among the high peaks of the Andes at over 4000 m a.s.l. This ecosystem covers parts of north-eastern Chile, north-western Argentina, south-eastern Peru, and mid-western Bolivia. The puna brings together several types of wetlands, such as salt-flats, lakes, rivers, high marshes, and highland bogs. Highland bogs are peatlands associated with endorheic basins. The object of this study was to analyse the specific composition and structure of the zooplankton of the bogs of the Putana River, on the Altiplano of northern Chile. In 2012, zooplankton samples were taken for qualitative and quantitative analysis at nine stations of the bog. Nine taxa of zooplanktonic crustaceans were recorded. The species richness is higher than records in other high Andean wetland at a similar altitude, although the species found have been reported for other high Andean wetlands and Andean lakes in Chile and from neighbouring countries.

scholarly journals DEVELOPMENT AND INTRODUCTION OF NEW HIGH-POTENCY GROWTH REGULATOR FOR RESTORING SOIL FERTILITY IN ARID AREAS OF KAZAKHSTAN

2020 ◽  
Vol 17 (36) ◽  
pp. 315-333
Author(s):  
Kazhimukhan T ARYNOV ◽  
Zhailaubay ZHUBATOV ◽  
Abdirazah P AUESHOV ◽  
Gulnur M SARUAROVA ◽  
Nazgul M NURTAZA
Keyword(s):  
Brown Coal ◽  
Field Experiments ◽  
Growth Stimulation ◽  
Mineral Fertilizers ◽  
Vegetable Crops ◽  
Research Results ◽  
Grain Crops ◽  
Composition And Structure ◽  
Wide Range ◽  
The Republic

The object of the study is organic mineral fertilizers obtained from brown coal and vermicompost to increase the yield of grain and vegetable crops, as well as various tree varieties. The purpose of the study is the development and implementation of a new organomineral fertilizer to restore the fertility of soil and forests, reduce desertification, and increase the yield of agricultural crops. In the process, studies were carried out to select the optimal conditions for obtaining organomineral fertilizer s, determine their composition and structure, and establish the optimal concentration of the compound. As a result of the work carried out, several organomineral fertilizer with the effect of growth stimulation have been synthesized from a complex feedstock: brown coal and vermicompost, containing enzymes, amino acids, vitamins, organic acids, phytohormones, as well as a complex of minerals and trace elements. Laboratory and field experiments on the effect of the new organomineral fertilizer on vegetables, grain crops, and some trees were carried out. It has been discovered that the use of the new fertilizer increases the yield of grain crops by 4.2-4.7 dt/ha and vegetable crops by 2.4-3.2 t/ha. The use of this compound in the agrotechnical cultivation of coniferous trees increases 4.0-4.7 cm compared to the basic version of fertilizer. At the forest nursery of MPI “Bakanasskoe Forestry”, experiments on the effect of organic fertilization on the seeds of black saxaul are carried out on the territory of 1.0 hectares. Degree of implementation - applications for patents of the Republic of Kazakhstan and the Eurasian Patent Office have been submitted. Based on the research results, it is planned to develop and introduce 1 compound into the practice of plant growth. The research results can find application in the following areas: agriculture and forestry, soil ecology and agrochemistry, biotechnology. Efficiency – the simplicity of production technology, multicomponent, good solubility in water, a low dose of application – 0.01% of the active ingredient (0.1 g per 100 l of water) or long shelf life, safety, a wide range of crops covered.

Crystal Structure Analysis of Cu-Zr Alloys by Convergent Beam Diffraction

1981 ◽  
Vol 39 ◽  
pp. 354-355
Author(s):  
A. F. Marshall ◽  
J. W. Steeds ◽  
D. Bouchet ◽  
S. L. Shinde ◽  
R. G. Walmsley
Keyword(s):  
Crystal Structure ◽  
Point Group ◽  
Intermetallic Phase ◽  
Three Dimensional ◽  
Crystal Structure Analysis ◽  
Ion Milling ◽  
Composition And Structure ◽  
Unit Cells ◽  
Sputter Deposited ◽  
Convergent Beam

Convergent beam electron diffraction is a powerful technique for determining the crystal structure of a material in TEM. In this paper we have applied it to the study of the intermetallic phases in the Cu-rich end of the Cu-Zr system. These phases are highly ordered. Their composition and structure has been previously studied by microprobe and x-ray diffraction with sometimes conflicting results.The crystalline phases were obtained by annealing amorphous sputter-deposited Cu-Zr. Specimens were thinned for TEM by ion milling and observed in a Philips EM 400. Due to the large unit cells involved, a small convergence angle of diffraction was used; however, the three-dimensional lattice and symmetry information of convergent beam microdiffraction patterns is still present. The results are as follows:1) 21 at% Zr in Cu: annealed at 500°C for 5 hours. An intermetallic phase, Cu3.6Zr (21.7% Zr), space group P6/m has been proposed near this composition (2). The major phase of our annealed material was hexagonal with a point group determined as 6/m.

Off-axis electron holography applied to the study of interfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 244-245
Author(s):  
J.K. Weiss ◽  
M. Gajdardziska-Josifovska ◽  
M. R. McCartney ◽  
David J. Smith
Keyword(s):  
Electric Fields ◽  
Resolution Enhancement ◽  
Interfacial Structure ◽  
Atomic Scale ◽  
Bulk Property ◽  
Electron Holography ◽  
Specimen Thickness ◽  
Composition And Structure ◽  
Chemical Segregation ◽  
Diffraction Effects

Interfacial structure is a controlling parameter in the behavior of many materials. Electron microscopy methods are widely used for characterizing such features as interface abruptness and chemical segregation at interfaces. The problem for high resolution microscopy is to establish optimum imaging conditions for extracting this information. We have found that off-axis electron holography can provide useful information for the study of interfaces that is not easily obtained by other techniques.Electron holography permits the recovery of both the amplitude and the phase of the image wave. Recent studies have applied the information obtained from electron holograms to characterizing magnetic and electric fields in materials and also to atomic-scale resolution enhancement. The phase of an electron wave passing through a specimen is shifted by an amount which is proportional to the product of the specimen thickness and the projected electrostatic potential (ignoring magnetic fields and diffraction effects). If atomic-scale variations are ignored, the potential in the specimen is described by the mean inner potential, a bulk property sensitive to both composition and structure. For the study of interfaces, the specimen thickness is assumed to be approximately constant across the interface, so that the phase of the image wave will give a picture of mean inner potential across the interface.

Thermal/electric energy generation and CO2 production for greenhouse facilities

2019 ◽  
Vol 2 (3) ◽  
pp. 141-151
Author(s):  
O. E. Gnezdova ◽  
E. S. Chugunkova
Keyword(s):  
Carbon Dioxide ◽  
Power Distribution ◽  
Power Plants ◽  
Electric Energy ◽  
Electricity Consumption ◽  
Vegetable Crops ◽  
Carbon Dioxide Injection ◽  
Electricity Rates ◽  
Traditional Patterns ◽  
Generation Power

Introduction: greenhouses need microclimate control systems to grow agricultural crops. The method of carbon dioxide injection, which is currently used by agricultural companies, causes particular problems. Co-generation power plants may boost the greenhouse efficiency, as they are capable of producing electric energy, heat and cold, as well as carbon dioxide designated for greenhouse plants.Methods: the co-authors provide their estimates of the future gas/electricity rates growth in the short term; they have made a breakdown of the costs of greenhouse products, and they have also compiled the diagrams describing electricity consumption in case of traditional and non-traditional patterns of power supply; they also provide a power distribution pattern typical for greenhouse businesses, as well as the structure and the principle of operation of a co-generation unit used by a greenhouse facility.Results and discussion: the co-authors highlight the strengths of co-generation units used by greenhouse facilities. They have also identified the biological features of carbon dioxide generation and consumption, and they have listed the consequences of using carbon dioxide to enrich vegetable crops.Conclusion: the co-authors have formulated the expediency of using co-generation power plants as part of power generation facilities that serve greenhouses.

Bok Choy, an Asian Leafy Green Vegetable Emerging in Florida

EDIS ◽  
2019 ◽  
Vol 2019 (6) ◽  
pp. 5
Author(s):  
Hai Liu ◽  
Guodong Liu
Keyword(s):  
Graduate Students ◽  
Crop Production ◽  
Health Benefits ◽  
Extension Agents ◽  
Vegetable Crops ◽  
Green Vegetable ◽  
General Overview

Asian vegetable crops are rapidly expanding in Florida in the last decade due to their health benefits combined with their high profitability. These crops can help increase vegetable growers’ income and diversify Florida’s crop production, and they are new to most Floridians. This new 5-page article provides a general overview of bok choy for vegetable growers, crop consultants, certified crop advisors, Extension agents, and graduate students. Written by Hai Liu and Guodong Liu and published by the UF/IFAS Horticultural Sciences Department.https://edis.ifas.ufl.edu/hs1337

Sign in / Sign up

Export Citation Format

Share Document