Chapter 7: Laboratory techniques for determining seismic velocities and attenuations, with applications to the continental lithosphere

1989 ◽  
pp. 91-102 ◽  
Author(s):  
Nikolas I. Christensen ◽  
William W. Wepfer
Keyword(s):  
Seismic Velocities ◽  
Continental Lithosphere ◽  
Laboratory Techniques

The depth dependence of heat production in the continental lithosphere, derived from seismic velocities

1987 ◽  
Vol 14 (3) ◽  
pp. 311-313 ◽  
Author(s):  
Ladislaus Rybach ◽  
Vladimír Cermák
Keyword(s):  
Heat Production ◽  
Seismic Velocities ◽  
Continental Lithosphere ◽  
Depth Dependence

Continental Drift with Deep Cratonic Roots

2020 ◽  
Vol 49 (1) ◽  
Author(s):  
Masaki Yoshida ◽  
Kazunori Yoshizawa
Keyword(s):  
Plate Tectonics ◽  
Continental Drift ◽  
High Viscosity ◽  
Annual Review ◽  
Publication Date ◽  
Mantle Flow ◽  
Seismic Velocities ◽  
Continental Lithosphere ◽  
Low Viscosity ◽  
Orogenic Belts

The influence of the continental lithosphere and its root (or keel) on the continental drift of Earth is a key element in the history of plate tectonics. Previous geodynamic studies of mantle flow suggested that the cratonic root is moderately mechanically coupled with the underlying mantle, and stable continental drift on Earth's timescales occurs when the effective viscosity contrast between the continental lithosphere and the underlying mantle is approximately 103. Both geodynamics and seismological studies indicate that mechanically weak mobile belts (i.e., orogenic or suture zones) that surround cratons may play a role in the longevity of the cratonic lithosphere over geologically long timescales (i.e., over 1,000 million years) because they act as a buffer region against the high-viscosity cratons. Low-viscosity asthenosphere, characterized by slow seismic velocities, reduces the basal drag force acting on the cratonic root, which may also contribute to the longevity of the cratonic lithosphere. ▪ The role of the continental lithosphere and its root on the continental drift is reviewed from recent geodynamic and seismological studies. ▪ The cratonic root is moderately mechanically coupled with the underlying mantle and deformed by mantle flow over geological timescales. ▪ Orogenic belts or suture zones that surround cratons act as a buffer to protect cratons and are essential for their longevity. ▪ Low-viscosity asthenosphere may reduce the basal drag acting on the cratonic root and also contribute to its stability and longevity. Expected final online publication date for the Annual Review of Earth and Planetary Sciences, Volume 49 is May 28, 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

The Adaptation of Medical Records to Epidemiological Use

1965 ◽  
Vol 04 (03) ◽  
pp. 136-140
Author(s):  
Cl Jeanty
Keyword(s):  
Medical Records ◽  
Clinical Pathology ◽  
Time Variable ◽  
Special Care ◽  
General Description ◽  
Causal Relations ◽  
Laboratory Techniques ◽  
Original Record ◽  
Statistical Studies

A method is described in an attempt to make medical records suitable for epidemiologigri: purposes. Every case of a disease is recorded on an appropriate punched card with the object of working towards a general description of a disease through the collation of several cases of the same diagnosis. This punched card represents a very great condensation of the original record. Special care has been applied to state as precisely as possible the time variable, particularly as far as its origin and unit of measure are concerned, in order to demonstrate the existence of causal relations between diseases. Such cards are also intended to make easier statistical studies in clinical pathology, in evaluation of new laboratory techniques, and in therapeutical trials.

Forage Evaluation Using Various Laboratory Techniques

1976 ◽  
Vol 43 (5) ◽  
pp. 1058-1065 ◽  
Author(s):  
Parnich Tinnimit ◽  
J. W. Thomas
Keyword(s):  
Laboratory Techniques

Reactive Arthritis: Modern Aspects of Diagnosis and Treatment

2020 ◽  
Vol 65 (7-8) ◽  
pp. 63-70
Author(s):  
B. S. Belov ◽  
R. M. Balabanova
Keyword(s):  
Russian Federation ◽  
Clinical Picture ◽  
Reactive Arthritis ◽  
Epidemiological Data ◽  
Controlled Trials ◽  
Antimicrobial Drugs ◽  
Randomized Controlled ◽  
Laboratory Techniques ◽  
High Prevalence ◽  
The Russian Federation

Currently, the problem of reactive arthritis (ReA) retains its importance due to the fairly high prevalence of the disease, primarily in Russia. Analysis of epidemiological data allows us to put forward a number of possible reasons explaining the different frequency of ReA in certain regions of the Russian Federation and in other countries. The lecture describes the clinical picture of the disease, as well as analyzes the significance of various laboratory techniques aimed at identifying the causative agent of ReA. The Russian diagnostic criteria for ReA are presented. The main approaches to the therapy of ReA are outlined with an emphasis on the use of antimicrobial drugs. The effectiveness and safety of drug immunocorrection (inducers of interferon, polyoxidonium, immunofan, etc.) in the treatment of urogenital chlamydia in patients with ReA have not been confirmed by data from randomized controlled trials.

Modern Trends in Sludge Management: Sludge Conditioning

1983 ◽  
Vol 15 (1) ◽  
pp. 37-48 ◽  
Author(s):  
G E Eden
Keyword(s):  
Relative Efficiency ◽  
Sludge Management ◽  
Chemical Methods ◽  
Laboratory Techniques ◽  
Sludge Conditioning

The origins and characteristics of sludges are described in relation to the need to dewater them for ultimate disposal. Various methods for conditioning sludge to facilitate subsequent dewatering are discussed, including physical, thermal and chemical methods. The special features of conditioning by polyelectrolytes are described and an account is given of laboratory techniques for comparing the relative efficiency of conditioners.

Identification, Prediction and Data Analysis of Noncoding RNAs: A Review

2019 ◽  
Vol 15 (3) ◽  
pp. 216-230 ◽  
Author(s):  
Abbasali Emamjomeh ◽  
Javad Zahiri ◽  
Mehrdad Asadian ◽  
Mehrdad Behmanesh ◽  
Barat A. Fakheri ◽  
...  
Keyword(s):  
Computational Methods ◽  
State Of The Art ◽  
Noncoding Rnas ◽  
Research Field ◽  
Design Strategies ◽  
Structural Prediction ◽  
Computational Costs ◽  
Cellular Processes ◽  
Laboratory Techniques ◽  
Fast Prediction

Background:Noncoding RNAs (ncRNAs) which play an important role in various cellular processes are important in medicine as well as in drug design strategies. Different studies have shown that ncRNAs are dis-regulated in cancer cells and play an important role in human tumorigenesis. Therefore, it is important to identify and predict such molecules by experimental and computational methods, respectively. However, to avoid expensive experimental methods, computational algorithms have been developed for accurately and fast prediction of ncRNAs.Objective:The aim of this review was to introduce the experimental and computational methods to identify and predict ncRNAs structure. Also, we explained the ncRNA’s roles in cellular processes and drugs design, briefly.Method:In this survey, we will introduce ncRNAs and their roles in biological and medicinal processes. Then, some important laboratory techniques will be studied to identify ncRNAs. Finally, the state-of-the-art models and algorithms will be introduced along with important tools and databases.Results:The results showed that the integration of experimental and computational approaches improves to identify ncRNAs. Moreover, the high accurate databases, algorithms and tools were compared to predict the ncRNAs.Conclusion:ncRNAs prediction is an exciting research field, but there are different difficulties. It requires accurate and reliable algorithms and tools. Also, it should be mentioned that computational costs of such algorithm including running time and usage memory are very important. Finally, some suggestions were presented to improve computational methods of ncRNAs gene and structural prediction.

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