scholarly journals Comparative analyses of flower scent in Sileneae reveal a contrasting phylogenetic signal between night and day emissions

2016 ◽  
Vol 6 (21) ◽  
pp. 7869-7881 ◽  
Author(s):  
Samuel Prieto-Benítez ◽  
Ana M. Millanes ◽  
Stefan Dötterl ◽  
Luis Giménez-Benavides
Keyword(s):  
Phylogenetic Signal ◽  
Comparative Analyses ◽  
Flower Scent ◽  
Night And Day

Development of a Rapid Survey Method of Sampling and Analysis for Asbestos in Ambient Air

1972 ◽  
Vol 30 ◽  
pp. 630-631 ◽  
Author(s):  
R. E. Heffelfinger ◽  
C. W. Melton ◽  
D. L. Kiefer ◽  
W. M. Henry ◽  
R. J. Thompson
Keyword(s):  
Neutron Activation ◽  
Ambient Air ◽  
Survey Method ◽  
Potential Hazard ◽  
Transmission Microscopy ◽  
Comparative Analyses ◽  
Asbestos Fibers ◽  
Controlled Conditions ◽  
Unequivocal Identification ◽  
Identification And Quantification

A methodology has been developed and demonstrated which is capable of determining total amounts of asbestos fibers and fibrils in air ranging from as low as fractional nanograms per cubic meter (ng/m3) of air to several micrograms/m3. The method involves the collection of samples on an absolute filter and provides an unequivocal identification and quantification of the total asbestos contents including fibrils in the collected samples.The developed method depends on the trituration under controlled conditions to reduce the fibers to fibrils, separation of the asbestos fibrils from other collected air particulates (beneficiation), and the use of transmission microscopy for identification and quantification. Its validity has been tested by comparative analyses by neutron activation techniques. It can supply the data needed to set emissions criteria and to serve as a basis for assessing the potential hazard for asbestos pollution to the populace.

Characteristics of the Night and Day Time Atmospheric Boundary Layer at Dome C, Antarctica

2007 ◽  
Vol 25 ◽  
pp. 49-55 ◽  
Author(s):  
S. Argentini ◽  
I. Pietroni ◽  
G. Mastrantonio ◽  
A. Viola ◽  
S. Zilitinchevich
Keyword(s):  
Boundary Layer ◽  
Atmospheric Boundary Layer ◽  
Night And Day

Disentangling the role of shared ancestry and the environment on leaf stable isotopes

2019 ◽  
Author(s):  
Marko J. Spasojevic ◽  
Sören Weber1
Keyword(s):  
Stable Isotopes ◽  
Environmental Conditions ◽  
Evolutionary History ◽  
Environmental Control ◽  
Phylogenetic Signal ◽  
Individual Species ◽  
Habitat Types ◽  
Δ13c And Δ15n ◽  
Environmental Controls ◽  
Shared Ancestry

Stable carbon (C) and nitrogen (N) isotopes in plants are important indicators of plant water use efficiency and N acquisition strategies. While often regarded as being under environmental control, there is growing evidence that evolutionary history may also shape variation in stable isotope ratios (δ13C and δ15N) among plant species. Here we examined patterns of foliar δ13C and δ15N in alpine tundra for 59 species in 20 plant families. To assess the importance of environmental controls and evolutionary history, we examined if average δ13C and δ15N predictably differed among habitat types, if individual species exhibited intraspecific trait variation (ITV) in δ13C and δ15N, and if there were a significant phylogenetic signal in δ13C and δ15N. We found that variation among habitat types in both δ13C and δ15N mirrored well-known patterns of water and nitrogen limitation. Conversely, we also found that 40% of species exhibited no ITV in δ13C and 35% of species exhibited no ITV in δ15N, suggesting that some species are under stronger evolutionary control. However, we only found a modest signal of phylogenetic conservatism in δ13C and no phylogenetic signal in δ15N suggesting that shared ancestry is a weaker driver of tundra wide variation in stable isotopes. Together, our results suggest that both evolutionary history and local environmental conditions play a role in determining variation in δ13C and δ15N and that considering both factors can help with interpreting isotope patterns in nature and with predicting which species may be able to respond to rapidly changing environmental conditions.

The economic strength and tax capacity of the Krasnoyarsk Krai: Challenges and the prospects for development

2020 ◽  
Vol 18 (4) ◽  
pp. 642-651
Author(s):  
V.V. Zozulya ◽  
I.S. Goryunova ◽  
I.V. Zozulya
Keyword(s):  
Sustainable Development ◽  
Import Substitution ◽  
Krasnoyarsk Krai ◽  
Resource Potential ◽  
The Sustainable Development ◽  
Comparative Analyses ◽  
Graphic Visualization ◽  
Further Development ◽  
Tax Capacity

Subject. The article discusses the prospects for the development of the Krasnoyarsk Krai and the implementation of the import substitution programme. Objectives. The article aims to analyze the tax potential of the Krasnoyarsk Krai, highlight the main problems, and identify possible directions for further development of the Krai. Methods. For the study, we used systems and institutional approaches, the methods of statistical and comparative analyses, and data tabular and graphic visualization. Results. The article identifies the main obstacles to the sustainable development of the Krasnoyarsk Krai. Conclusions. The Krasnoyarsk Krai has a strong economic and resource potential for further development, which is not being implemented properly.

COMPARATIVE ANALYSES OF TWO PROGRAMING TOOLS BASED ON RELIABILITY

2019 ◽  
Author(s):  
Isaires Kayla Farias de Luna Barbosa ◽  
Pedro Pereira ◽  
Adriano Marques
Keyword(s):  
Comparative Analyses
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