scholarly journals Detailed analysis of the isotopic composition of CO and characterization of the air masses arriving at Mount Sonnblick (Austrian Alps)

2001 ◽  
Vol 106 (D3) ◽  
pp. 3179-3193 ◽  
Author(s):  
Valérie Gros ◽  
Maya Bräunlich ◽  
T. Röckmann ◽  
P. Jöckel ◽  
P. Bergamaschi ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Detailed Analysis ◽  
Air Masses ◽  
Austrian Alps

MALAT1 as a Versatile Regulator of Cancer: Overview of the updates from Predatory role as Competitive Endogenous RNA to Mechanistic In-sights

2020 ◽  
Vol 20 ◽  
Author(s):  
Ammad Ahmad Farooqi ◽  
Evangelia Legaki ◽  
Maria Gazouli ◽  
Silvia Rinaldi ◽  
Rossana Berardi
Keyword(s):  
Molecular Biology ◽  
Detailed Analysis ◽  
Signaling Pathways ◽  
Individualized Medicine ◽  
Signaling Cascades ◽  
Oncogenic Signaling ◽  
Non Coding Rnas ◽  
Oncogenic Signaling Pathways ◽  
Competitive Endogenous Rna

: Central dogma of molecular biology has remained cornerstone of classical molecular biology but serendipitous discovery of microRNAs (miRNAs) in nematodes paradigmatically shifted our current understanding of the intricate mech-anisms which occur during transitions from transcription to translation. Discovery of miRNA captured tremendous attention and appreciation and we had witnessed an explosion in the field of non-coding RNAs. Ground-breaking discoveries in the field of non-coding RNAs have helped in better characterization of microRNAs and long non-coding RNAs (LncRNAs). There is an ever-increasing list of miRNA targets which are regulated by MALAT1 to stimulate or repress expression of tar-get genes. However, in this review our main focus is to summarize mechanistic insights related to MALAT1-mediated regu-lation of oncogenic signaling pathways. We have discussed how MALAT1 modulated TGF/SMAD and Hippo pathways in various cancers. We have also comprehensively summarized how JAK/STAT and Wnt/β-catenin pathways stimulated MALAT1 expression and consequentially how MALAT1 potentiated these signaling cascades to promote cancer. MALAT1 research has undergone substantial broadening however, there is still a need to identify additional mechanisms. MALAT1 is involved in multi-layered regulation of multiple transduction cascades and detailed analysis of different pathways will be helpful in getting a step closer to individualized medicine.

Ecological and isotopic discrimination of syntopic rodents in a neotropical rain forest of French Guiana

2003 ◽  
Vol 19 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Jean-François Mauffrey ◽  
François Catzeflis
Keyword(s):  
Stable Isotopes ◽  
Isotopic Composition ◽  
Rain Forest ◽  
French Guiana ◽  
Ecological Studies ◽  
Carbon Isotope Ratios ◽  
Photosynthetic Pathways ◽  
Feeding Process ◽  
Neotropical Rain Forest

Stable isotopes are commonly used in ecological studies to infer food resources (Ambrose & DeNiro 1986, Bocherens et al. 1990,1991,1994;Yoshinaga et al. 1991) since isotopic composition is conserved during the feeding process. Moreover,for herbivorous (sensu lato) species, it is often possible to identify the main resource because different photosynthetic pathways generate different values of carbon isotope ratios (Park & Epstein 1961, Sternberg et al. 1984). This allows the characterization of broad biota such as savannas or forest and discrimination of grazers from sympatric folivorous species (DeNiro & Epstein 1978).

Characterization of NOx-Ox relationships during daytime interchange of air masses over a mountain pass in the Mexico City megalopolis

2018 ◽  
Vol 177 ◽  
pp. 100-110 ◽  
Author(s):  
J.S. García-Yee ◽  
R. Torres-Jardón ◽  
H. Barrera-Huertas ◽  
T. Castro ◽  
O. Peralta ◽  
...  
Keyword(s):  
Mexico City ◽  
Mountain Pass ◽  
Air Masses

scholarly journals Characterization of ions at Alpine waterfalls

2011 ◽  
Vol 11 (9) ◽  
pp. 25297-25325 ◽  
Author(s):  
P. Kolarž ◽  
M. Gaisberger ◽  
P. Madl ◽  
W. Hofmann ◽  
M. Ritter ◽  
...  
Keyword(s):  
Negative Ion ◽  
Moderate Increase ◽  
Field Campaign ◽  
Ion Gradients ◽  
Austrian Alps ◽  
Positive Ions ◽  
Ion Detector

Abstract. During a three-year field campaign of measuring waterfall generated ions, we monitored five different waterfalls in the Austrian Alps. Most measurements were performed at the Krimml waterfall (Salzburg), which is the biggest and most visited one in Europe and the Gartl waterfall (Mölltal, Carinthia). Smallest ion sizes (0.9–2 nm) were measured with a cylindrical air ion detector (CDI-06) while ion sizes from 5.5 to 350 nm were measured using a modified Grimm SMPS aerosol spectrometer. Measurements showed high negative ion gradients nearby waterfalls whereas positive ions showed only a moderate increase. The most abundant sizes of nano-sized and sub-micrometer ions measured were at 2 nm and of the larger and heavier ones at 120 nm.

Characterization of Defect Structures in SiC Single Crystals Using Synchrotron X-Ray Topography

1993 ◽  
Vol 307 ◽  
Author(s):  
S. Wang ◽  
M. Dudley ◽  
C. Carter ◽  
D. Asbury ◽  
C. Fazit
Keyword(s):  
Detailed Analysis ◽  
Single Crystals ◽  
Basal Plane ◽  
Defect Structures ◽  
Dislocation Generation ◽  
Screw Dislocations ◽  
X Ray ◽  
White Beam

ABSTRACTSynchrotron white beam X-ray topography has been used to characterize defect structures in 6H-SiC wafers grown on (0001) seeds. Two major types of defects are observed: super screw dislocations approximately perpendicular to the basal plane and dislocation networks lying in the basal plane. The super screw dislocations, which have open cores, are growth dislocations. These dislocations act as sources and/or sinks for the glide dislocation networks. Detailed analysis and discussion of dislocation generation phenomena and Burgers vectors will be presented.

scholarly journals Production and Characterization of Oxyhydroxyapatites

2018 ◽  
Vol 762 ◽  
pp. 48-53
Author(s):  
Liene Pluduma ◽  
Karlis Agris Gross ◽  
Christian Rey ◽  
Arnolds Ubelis ◽  
Astrida Berzina
Keyword(s):  
Fourier Transform ◽  
Detailed Analysis ◽  
Absorption Line ◽  
Infrared Absorption ◽  
Fourier Transform Infrared ◽  
Peak Shift ◽  
Ion Absorption ◽  
Hydroxyl Ion

The amount and alignment of hydroxyl ions influence the bioactivity of hydroxyapatite. Hydroxyl ions in hydroxyapatite are the most mobile and upon heating are the first to leave the lattice to form oxyhydroxyapatite. This work describes a method for producing hydroxyapatite with different amounts of hydroxyl ions, and reports on the changes in Fourier transform infrared absorption at increasing level of dehydroxylation. Detailed analysis of spectra in the 500 – 700 cm-1 range showed a peak shift for the hydroxyl ion absorption line at 632 cm-1 to 637 cm-1 and an increase in the wavenumber for the phosphate line at 575 cm-1.

The Characterization of Secondary Interstellar Neutral Oxygen beyond the Heliopause: A Detailed Analysis of the IBEX-Lo Oxygen Observations

2019 ◽  
Vol 880 (1) ◽  
pp. 4 ◽  
Author(s):  
Jeewoo Park ◽  
Harald Kucharek ◽  
Nikolaos Paschalidis ◽  
Adam Szabo ◽  
David Heirtzler ◽  
...  
Keyword(s):  
Detailed Analysis

The Fuel of Scientific Progress

Black Boxes ◽  
2021 ◽  
pp. 215-249
Author(s):  
Marco J. Nathan
Keyword(s):  
Philosophy Of Science ◽  
Detailed Analysis ◽  
Scientific Progress ◽  
Main Stage ◽  
General Characterization ◽  
The Core ◽  
Cumulative Model ◽  
New Millennium

This chapter addresses a classic topic: the advancement of science. In the wake of Kuhn’s groundbreaking work, positivist philosophy of science was replaced by a more realistic and historically informed depiction of science. However, over half a century has now passed since the publication of Structure. Despite valiant attempts, we still lack a fully developed, viable replacement for the cumulative model presupposed by positivism. At the dawn of the new millennium, mainstream philosophy eventually abandoned the project of developing a grand, overarching account of science. The quest for generality was traded in for a more detailed analysis of particular disciplines and practices. The goal of this chapter is to show how the black-boxing strategy can offer a revamped formulation of scientific progress, an important topic that lies at the core of any general characterization of science, and bring it back on the philosophical main stage, where it legitimately belongs.

scholarly journals Characterization of aerosol types over Lake Urmia Basin

2019 ◽  
Vol 99 ◽  
pp. 01006
Author(s):  
Sanaz Moghim ◽  
Reyhaneh Ramezanpoor
Keyword(s):  
Atmospheric Aerosols ◽  
Lake Urmia ◽  
Complete Evaluation ◽  
Air Masses ◽  
Local Pollution ◽  
Wind Circulation ◽  
Aerosol Sources ◽  
Earth’S Climate ◽  
Aerosol Types

Atmospheric aerosols affect the Earth's climate, air quality, and thus human health. This study used the Aerosol Optical Depth (AOD) and the Ångström exponent to cluster different particle types over the Lake Urmia Basin. This classification found desert dust and marine (mixed with continental or local-pollution aerosols) as two main aerosol types over the region, while their sources are not well defined. Although different air masses and wind circulation over the study domain in varied months can help to distinguish aerosol sources, measurements are crucial for a complete evaluation.

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