Breathing and Dying in 2020

Author(s):  
Anita Chary

Every ethnographer balances participation and observation during fieldwork in their own unique way. For those whose primary role is participation, field notes represent an avenue for reflecting on trends that may not be immediately obvious when one is mired in the ethnographic setting. The author, an emergency physician and anthropologist, reflects on racial injustices and transformations in biomedical rituals to do with death and dying, from the front lines of the COVID-19 pandemic.

Author(s):  
Donald A. Winkelmann

The primary role of the interaction of actin and myosin is the generation of force and motion as a direct consequence of the cyclic interaction of myosin crossbridges with actin filaments. Myosin is composed of six polypeptides: two heavy chains of molecular weight 220,000 daltons and two pairs of light chains of molecular weight 17,000-23,000. The C-terminal portions of the myosin heavy chains associate to form an α-helical coiled-coil rod which is responsible for myosin filament formation. The N-terminal portion of each heavy chain associates with two different light chains to form a globular head that binds actin and hydrolyses ATP. Myosin can be fragmented by limited proteolysis into several structural and functional domains. It has recently been demonstrated using an in vitro movement assay that the globular head domain, subfragment-1, is sufficient to cause sliding movement of actin filaments.The discovery of conditions for crystallization of the myosin subfragment-1 (S1) has led to a systematic analysis of S1 structure by x-ray crystallography and electron microscopy. Image analysis of electron micrographs of thin sections of small S1 crystals has been used to determine the structure of S1 in the crystal lattice.


Author(s):  
P.T. Nguyen ◽  
C. Uphoff ◽  
C.L. Stinemetz

Considerable evidence suggest that the calcium-binding protein calmodulin (CaM) may mediate calcium action and/or transport important in the gravity response of plants. Calmodulin is present in both shoots and roots and is capable of regulating calcium transport in plant vesicles. In roots calmodulin is concentrated in the tip, the gravisensing region of the root; and is reported to be closely associated with amyloplasts, organelles suggested to play a primary role in gravi-perception. Inhibitors of CaM such as chlorpromazine, calmidazolium, and compound 48/80 interfere with the gravitropic response of both snoots and roots. The magnitude of the inhibition corresponded well with the extent to which the drug binds to endogenous CaM. Compound 48/80 and calmidazolium block gravi-induced changes in electrical currents across root tips, a phenomenon thought to be associated with the sensing of the gravity stimulus.In this study, we have investigated the subcellular distribution of CaM in graviresponsive and non-graviresponsive root caps of the maize cultivar Merit.


2019 ◽  
Vol 4 (6) ◽  
pp. 1507-1515
Author(s):  
Lauren L. Madhoun ◽  
Robert Dempster

Purpose Feeding challenges are common for infants in the neonatal intensive care unit (NICU). While sufficient oral feeding is typically a goal during NICU admission, this can be a long and complicated process for both the infant and the family. Many of the stressors related to feeding persist long after hospital discharge, which results in the parents taking the primary role of navigating the infant's course to ensure continued feeding success. This is in addition to dealing with the psychological impact of having a child requiring increased medical attention and the need to continue to fulfill the demands at home. In this clinical focus article, we examine 3 main areas that impact psychosocial stress among parents with infants in the NICU and following discharge: parenting, feeding, and supports. Implications for speech-language pathologists working with these infants and their families are discussed. A case example is also included to describe the treatment course of an infant and her parents in the NICU and after graduation to demonstrate these points further. Conclusion Speech-language pathologists working with infants in the NICU and following hospital discharge must realize the family context and psychosocial considerations that impact feeding progression. Understanding these factors may improve parental engagement to more effectively tailor treatment approaches to meet the needs of the child and family.


Author(s):  
Christoph Klimmt

This comment briefly examines the history of entertainment research in media psychology and welcomes the conceptual innovations in the contribution by Oliver and Bartsch (this issue). Theoretical perspectives for improving and expanding the “appreciation” concept in entertainment psychology are outlined. These refer to more systematic links of appreciation to the psychology of mixed emotions, to positive psychology, and to the psychology of death and dying – in particular, to terror management theory. In addition, methodological challenges are discussed that entertainment research faces when appreciation and the experience of “meaning for life” need to be addressed in empirical studies of media enjoyment.


1994 ◽  
Vol 39 (9) ◽  
pp. 914-914
Author(s):  
Terri Gullickson
Keyword(s):  

2011 ◽  
Author(s):  
Beth A. Barber ◽  
Charity Plaxton-Hennings ◽  
Holli M. H. Eaton ◽  
Sheryn T. Scott
Keyword(s):  

2000 ◽  
Vol 18 (6) ◽  
pp. 0737-0738
Author(s):  
Jason K. Fleming ◽  
Jay T. Ishida ◽  
Loren G. Yamamoto

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