The Value of Physical Factors in Insect Control

1964 ◽  
Vol 96 (1-2) ◽  
pp. 114-114
Author(s):  
P. Belton ◽  
M. G. Maw
Keyword(s):  
Insect Control ◽  
Physical Factors ◽  
New Methods ◽  
Naturally Occurring ◽  
Pressure Changes ◽  
Rapid Pressure ◽  
Methods Of Control

For several years we have been investigating the effects of natural and artificial acoustical and electrical phenomena on the behaviour of insects with a view to the development of new methods of control.A. Sounds can be exploited in two ways:–firstly to affect insects whose behaviour is stimulated by naturally-occurring sounds; secondly to use the very rapid pressure changes associated with sounds as a sort of “death ray.”

scholarly journals Air Movement in Snow Due to Windpumping

1989 ◽  
Vol 35 (120) ◽  
pp. 209-213 ◽  
Author(s):  
S.C. Colbeck
Keyword(s):  
Pore Space ◽  
Barometric Pressure ◽  
Surface Flows ◽  
Wind Speeds ◽  
Compression And Expansion ◽  
Strong Winds ◽  
Pressure Changes ◽  
Low Amplitude ◽  
Pressure Perturbations ◽  
Rapid Pressure

Abstract Strong winds can disrupt the thermal regime in seasonal snow because of the variation in surface pressure associated with surface features like dunes and ripples. Topographical features of shorter wavelengths produce stronger surface flows, but the flow decays rapidly with depth. Longer-wavelength features produce weaker surface flows but the flow decays more slowly with depth. The flow may only be strong enough to disrupt the temperature field for features of wavelengths on the scale of meters or tens of meters at wind speeds of 10 m/s or more. Other possible causes of windpumping have been examined but they do not appear to be as significant. Rapid pressure perturbations due to turbulence produce very little displacement of the air because of the high frequency and low amplitude. Barometric pressure changes cause compression and expansion of the air in the pore space, but the rate is too low to have much effect.

Study of Toynbee Phenomenon by Combined Intranasopharyngeal and Tympanometric Measurements

1988 ◽  
Vol 97 (2) ◽  
pp. 199-206 ◽  
Author(s):  
Yehuda Finkelstein ◽  
Yuval Zohar ◽  
Yoav P. Talmi ◽  
Nelu Laurian
Keyword(s):  
Middle Ear ◽  
Negative Pressure ◽  
Pressure Change ◽  
Positive Pressure ◽  
New Information ◽  
Pressure Changes ◽  
Rapid Pressure

The Toynbee maneuver, swallowing when the nose is obstructed, leads in most cases to pressure changes in one or both middle ears, resulting in a sensation of fullness. Since first described, many varying and contradictory comments have been reported in the literature concerning the type and amount of pressure changes both in the nasopharynx and in the middle ear. In our study, the pressure changes were determined by catheters placed into the nasopharynx and repeated tympanometric measurements. New information concerning the rapid pressure variations in the nasopharynx and middle ear during deglutition with an obstructed nose was obtained. Typical individual nasopharyngeal pressure change patterns were recorded, ranging from a maximal positive pressure of + 450 to a negative pressure as low as −320 mm H2O.

GENETIC METHODS OF INSECT CONTROL. HISTORY AND CURRENT STATE

2021 ◽  
Vol 14 (1) ◽  
pp. 51-63
Author(s):  
A. G. Viktorov
Keyword(s):  
Invasive Species ◽  
Natural Selection ◽  
Sterile Insect Technique ◽  
Genetically Engineered ◽  
Insect Control ◽  
Genetic Method ◽  
Recessive Mutations ◽  
Current State ◽  
Invasive Mosquito ◽  
Methods Of Control

The review considers the main stages in the development of genetic method of insect control: 1) The idea of A.S. Serebrovsky, who suggested releasing males with non-viable translocations into nature; 2) "Z-lethal" method of V.A. Strunnikov for control of harmful Lepidoptera, which consists in the release of males carrying two non-allelic recessive mutations in the sex Z-chromosomes into nature; 3) Sterile insect technique (SIT) used widely in practice in the second half of the XX-th century; 4) Genetically engineered biotechnology RIDL (Release of Insects carrying a Dominant Lethal) used in practice to control the invasive mosquito Aedes aegypti , the vector of Zika viruses and yellow fever. It is generalized that the main opponent of the genetic method of insect control is natural selection, which supports females, choosing natural rather than sterile or "genetically modified" males on mating. It follows from the above that genetic methods of control can be effective only in control of invasive species have not spread widely yet.

HeadTalk, HandTalk and the corpus: towards a framework for multi-modal, multi-media corpus development

Corpora ◽  
2009 ◽  
Vol 4 (1) ◽  
pp. 1-32 ◽  
Author(s):  
Dawn Knight ◽  
David Evans ◽  
Ronald Carter ◽  
Svenja Adolphs
Keyword(s):  
Social Science ◽  
Research Community ◽  
Ethical Challenges ◽  
Multiple Streams ◽  
New Methods ◽  
Naturally Occurring ◽  
Multi Media ◽  
The University ◽  
New Generation ◽  
Textual Records

In this paper, we address a number of key methodological challenges and concerns faced by linguists in the development of a new generation of corpora: the multi-modal, multi-media corpus – that which combines video, audio and textual records of naturally occurring discourse. We contextualise these issues according to a research project which is currently developing such a corpus: the ESRC-funded Understanding New Digital Records for e-Social Science (DReSS) project based at the University of Nottingham. 2 2 For further information, results and publications related to the project, please refer to the main DReSS website, at: http://web.mac.com/andy.crabtree/NCeSS_Digital_Records_Node/Welcome.html This paper primarily explores the questions of the functionality of the corpus, identifying the problems we faced in making multi-modal corpora ‘usable’ for further research. We focus on the need for new methods for categorising and marking up multiple streams of data, using, as examples, the coding of head nods and hand gestures. We also consider the challenges faced when integrating and representing the data in a functional corpus tool, to allow for further synthesis and analysis. Here, we also underline some of the ethical challenges faced in the development of this tool, exploring the issues faced both in the collection of data and in the future distribution of video corpora to the wider research community.

Carcinogen prediction in the laboratory: a personal view

1979 ◽  
Vol 205 (1158) ◽  
pp. 121-134 ◽  
Keyword(s):  
Personal View ◽  
Traditional Methods ◽  
New Methods ◽  
Naturally Occurring ◽  
Large Numbers ◽  
Dose Levels

Although carcinogens can be divided into various categories, i. e. viruses, physical agents and synthetic and naturally occurring chemicals, it is the latter that give rise to the greatest concern because of their number, quantity and distribution. Present methods of testing chemicals for potential carcinogenicity rely in the main on administration of these at maximally tolerated dose levels to animals, usually rodents, for the animals’ lifetime. Such tests would be economically impractical for all chemicals to which man is exposed. New methods have recently been introduced to screen large numbers of chemicals quickly and cheaply which rely on the unifying hypothesis that all carcinogenic chemicals are electrophiles or must be converted to such by metabolism. These methods will be reviewed and compared with traditional methods of carcinogenicity testing, particularly as to their role in attempting to predict hazard to man.

scholarly journals Studies on alfalfa diseases caused by fungi. II

2014 ◽  
Vol 9 (1) ◽  
pp. 23-52 ◽  
Author(s):  
S. Czaplińska
Keyword(s):  
Quantitative Composition ◽  
New Methods ◽  
Methods Of Control ◽  
Verticillium Albo Atrum

The specific and quantitative composition of the microflora was investigated within the range of the roots of 1-, 2- and 3-year plants in alfalfa cultures with the aim of finding effective new methods of control or prevention of diseases of alfalfa caused by <i>Verticillium albo-atrum</i> and <i>Ascochyta imperfect</i>. The biotic realations between the most numerous saprophytes found on the same sites and the above named pathogens were also studied.

scholarly journals Synthesis of Natural Products and the Development of Synthetic Methodology: The Case Study of (–)-Atrop-abyssomicin C

2017 ◽  
Vol 12 (8) ◽  
pp. 1934578X1701200
Author(s):  
Filip Bihelovic ◽  
Bojan Vulovic ◽  
Radomir N. Saicic
Keyword(s):  
Natural Products ◽  
Synthetic Route ◽  
Synthetic Methodology ◽  
General Applicability ◽  
Total Syntheses ◽  
New Methods ◽  
Naturally Occurring

During our attempt to follow the planned synthetic route to the naturally occurring antibiotic (–)- atrop-abyssomicin C, we encountered two shortcomings, which forced us to reconsider our tactics and find new methods to overcome the problems. These methods turned out to be of general applicability, as demonstrated later in total syntheses of two other natural products: (+)-allokainic acid and (-)-gabosine H. The paper provides a brief account of these endeavors.

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