Career Action Centre: The Health of Those Who Use It During Rapid Change

1999 ◽  
Author(s):  
J. M. McIntosh ◽  
C. A. Woodward ◽  
C. E. Cunningham ◽  
J. A. Brown ◽  
H. Shannon ◽  
...  
Keyword(s):  
Rapid Change

High time resolution enzyme cytochemistry of rod outer segment

1990 ◽  
Vol 48 (3) ◽  
pp. 878-879
Author(s):  
Takuma Saito ◽  
Toshihiro Takizawa
Keyword(s):  
Enzyme Activities ◽  
Outer Segment ◽  
Rapid Change ◽  
High Time Resolution ◽  
Visual Cell ◽  
Enzyme Cytochemistry ◽  
Activation Effect ◽  
Rod Outer Segment ◽  
Enzymatic Cascades ◽  
Rapid Drop

Cells and tissues live on a number of dynamic metabolic pathways, which are made up of sequential enzymatic cascades.Recent biochemical and physiological studies of vision research showed the importance of cGMP metabolism in the rod outer segment of visual cell, indicat ing that the photon activated rhodopsin exerts activation effect on the GTP binding protein, transducin, and this act ivated transducin further activates phosphodiesterase (PDEase) to result in a rapid drop in cGMP concentration in the cytoplasm of rod outer segment. This rapid drop of cGMP concentration exerts to close the ion channel on the plasma membrane and to stop of inward current brings hyperpolarization and evokes an action potential.These sequential change of enzyme activities, known as cGMP cascade, proceeds quite rapidly within msec order. Such a rapid change of enzyme activities, such as PDEase in rod outer segment, was not a matter of conventional histochemical invest igations.

A Rapid Change in Pressure

2020 ◽  
Vol 382 (5) ◽  
pp. e8
Author(s):  
Kristin D’Silva ◽  
Anand Vaidya ◽  
James W. Smithy ◽  
William J. Anderson ◽  
Barbara Cockrill
Keyword(s):  
Rapid Change

Decreasing water pressure cues ‘bailout’ in seaweed-associated crustaceans

2020 ◽  
Vol 653 ◽  
pp. 121-129
Author(s):  
RB Taylor ◽  
S Patke
Keyword(s):  
Water Pressure ◽  
Rapid Change ◽  
Brown Seaweed ◽  
Model System ◽  
Rate Of Change ◽  
Suitable Habitat ◽  
Changing Light ◽  
Surface Increase ◽  
Reduced Water ◽  
Transparent Chamber

Small mobile crustaceans are abundant on seaweeds. Many of these crustaceans rapidly abandon their host if it is detached from the seafloor and floats towards the surface, but the trigger for this ‘bailout’ behaviour is unknown. We tested 2 potential cues, i.e. rapid change in light and rapid change in water pressure, using >1 mm epifauna on the brown seaweed Carpophyllum plumosum as a model system. Bailout occurred in response to reduced water pressure, but not to changing light, as (1) bailout occurred at similar rates in light and dark, (2) bailout occurred on the seafloor when water pressure was reduced within a transparent chamber by the equivalent of ~0.5 m depth or more, and (3) little bailout occurred when water pressure was held constant within the chamber while seaweeds were raised to the surface. Increase in pressure (simulating sinking) did not induce bailout. The rate of bailout increased with increasing magnitude of pressure reduction but was not influenced greatly by the rate of change of pressure within the range tested (up to an equivalent of 0.4 m depth s-1). The use of pressure rather than light as a cue for bailout is consistent with the need for seaweed-associated crustaceans to rapidly abandon a detached host and relocate to suitable habitat during both day and night.

Collective Memory: Between Values and Historical Knowledge

2020 ◽  
pp. 124-142
Author(s):  
VICTOR BURLACHUK
Keyword(s):  
Twentieth Century ◽  
Soviet Union ◽  
Collective Memory ◽  
Rapid Change ◽  
Modern Society ◽  
The State ◽  
Main Element ◽  
Rapid Decline ◽  
The Past ◽  
The Future

At the end of the twentieth century, questions of a secondary nature suddenly became topical: what do we remember and who owns the memory? Memory as one of the mental characteristics of an individual’s activity is complemented by the concept of collective memory, which requires a different method of analysis than the activity of a separate individual. In the 1970s, a situation arose that gave rise to the so-called "historical politics" or "memory politics." If philosophical studies of memory problems of the 30’s and 40’s of the twentieth century were focused mainly on the peculiarities of perception of the past in the individual and collective consciousness and did not go beyond scientific discussions, then half a century later the situation has changed dramatically. The problem of memory has found its political sound: historians and sociologists, politicians and representatives of the media have entered the discourse on memory. Modern society, including all social, ethnic and family groups, has undergone a profound change in the traditional attitude towards the past, which has been associated with changes in the structure of government. In connection with the discrediting of the Soviet Union, the rapid decline of the Communist Party and its ideology, there was a collapse of Marxism, which provided for a certain model of time and history. The end of the revolutionary idea, a powerful vector that indicated the direction of historical time into the future, inevitably led to a rapid change in perception of the past. Three models of the future, which, according to Pierre Nora, defined the face of the past (the future as a restoration of the past, the future as progress and the future as a revolution) that existed until recently, have now lost their relevance. Today, absolute uncertainty hangs over the future. The inability to predict the future poses certain challenges to the present. The end of any teleology of history imposes on the present a debt of memory. Features of the life of memory, the specifics of its state and functioning directly affect the state of identity, both personal and collective. Distortion of memory, its incorrect work, and its ideological manipulation can give rise to an identity crisis. The memorial phenomenon is a certain political resource in a situation of severe socio-political breaks and changes. In the conditions of the economic crisis and in the absence of a real and clear program for future development, the state often seeks to turn memory into the main element of national consolidation.

A Compact Embodiment of Pluralities and Denial of Origins: Atwood’s The Year of The Flood

2016 ◽  
Vol 1 (3) ◽  
pp. 141
Author(s):  
Rana Sağıroğlu
Keyword(s):  
Science Fiction ◽  
21St Century ◽  
Social Order ◽  
Margaret Atwood ◽  
Rapid Change ◽  
The Novel ◽  
The World ◽  
Narrative Techniques ◽  
Why Questions ◽  
Near Future

Margaret Atwood, one of the most spectacular authors of postmodern movement, achieved to unite debatable and in demand critical points of 21st century such as science fiction, postmodernism and ecocriticism in the novel The Year of The Flood written in 2009. The novel could be regarded as an ecocritical manifesto and a dystopic mirror against today’s degenerated world, tending to a superficial base to keep the already order in use, by moving away from the fundamental solution of all humanity: nature. Although Atwood does not want her works to be called science fiction, it is obvious that science fiction plays an introductory role and gives the novel a ground explaining all ‘why’ questions of the novel. However, Atwood is not unjust while claiming that her works are not science fiction because of the inevitable rapid change of 21st century world becoming addicted to technology, especially Internet. It is easily observed by the reader that what she fictionalises throughout the novel is quite close to possibility, and the world may witness in the near future what she creates in the novel as science fiction. Additionally, postmodernism serves to the novel as the answerer of ‘how’ questions: How the world embraces pluralities, how heterogeneous social order is needed, and how impossible to run the world by dichotomies of patriarchal social order anymore. And lastly, ecocriticism gives the answers of ‘why’ questions of the novel: Why humanity is in chaos, why humanity has organized the world according to its own needs as if there were no living creatures apart from humanity. Therefore, The Year of The Flood meets the reader as a compact embodiment of science fiction, postmodernism and ecocriticism not only with its theme, but also with its narrative techniques.

"Too Much Change in Too Little Time": Maintaining Professional Competence in a Public Library

2013 ◽  
Author(s):  
Donna C. Chan ◽  
Ethel W. Auster
Keyword(s):  
Professional Development ◽  
Questionnaire Survey ◽  
Professional Competence ◽  
Rapid Change ◽  
Public Library ◽  
Pilot Survey ◽  
Reference Librarians ◽  
The Face ◽  
Policies And Programs

This paper presents the findings of a pilot survey of professional development of reference librarians in a large urban public library. This pilot is part of a larger study of the processes and strategies used by reference librarians to maintain professional competence in the face of rapid change in the workplace. Fifteen librarians answered a questionnaire survey and participated in interviews and the organization's training policies and programs were examined.

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