Structural adaptations for ram ventilation: Gill fusions in scombrids and billfishes

2012 ◽  
Vol 274 (1) ◽  
pp. 108-120 ◽  
Author(s):  
Nicholas C. Wegner ◽  
Chugey A. Sepulveda ◽  
Scott A. Aalbers ◽  
Jeffrey B. Graham
Keyword(s):  
Ram Ventilation ◽  
Structural Adaptations

scholarly journals Structural adaptations of lactate dehydrogenase isozymes.

1977 ◽  
Vol 74 (7) ◽  
pp. 2677-2681 ◽  
Author(s):  
W. Eventoff ◽  
M. G. Rossmann ◽  
S. S. Taylor ◽  
H. J. Torff ◽  
H. Meyer ◽  
...  
Keyword(s):  
Lactate Dehydrogenase ◽  
Lactate Dehydrogenase Isozymes ◽  
Structural Adaptations

Structural adaptations of bovine ungulates modern agrocenosis

2021 ◽  
Vol 1 (11) ◽  
pp. 6-15
Author(s):  
Sergey V. Posyabin ◽  
◽  
Elena N. Borkhunova ◽  
Vladislav V. Belogurov ◽  
Mikhail D. Kachalin ◽  
...  
Keyword(s):  
Body Size ◽  
Forest Soils ◽  
Distal Part ◽  
Static Load ◽  
High Weight ◽  
Morphometric Characteristics ◽  
Structural Adaptation ◽  
Solid Soil ◽  
Similar Body ◽  
Structural Adaptations

The article presents the results of studies of anatomical, histological and morphometric characteristics of bovine ungulates aimed at identifying signs of structural adaptation of the distal part of the limb to anthropogenically modeled content conditions. The factors that the hoof experiences are the predominance of static load, the high weight of the animal, and the support on solid soil. As a morphological control, elk is considered as a parrotfish animal with similar body size and weight, located in the conditions of natural biotsenose and moving on forest soils. It is shown that constant presence of cattle in conditions of hypokinesia on hard floors leads to change of limb setting and change of hoof shape, which is reflected in change of hoof shape, increase of hoof angle, ratio of plantar and dorsal hoof surfaces length. At the same time, the biomechanical load is redistributed between parts of the hoof so that the load on the wall increases and on the ball decreases. This may be a factor predisposing the hoof to the appearance of microtraumas, later manifested by laminites.

scholarly journals Biological glass: structural determinants of eye lens transparency

2011 ◽  
Vol 366 (1568) ◽  
pp. 1250-1264 ◽  
Author(s):  
Steven Bassnett ◽  
Yanrong Shi ◽  
Gijs F. J. M. Vrensen
Keyword(s):  
Refractive Index ◽  
Cellular Level ◽  
Structural Determinants ◽  
Lens Transparency ◽  
Index Matching ◽  
Lens Fibre ◽  
Refractive Index Matching ◽  
Lens Membranes ◽  
Adhesive Proteins ◽  
Structural Adaptations

The purpose of the lens is to project a sharply focused, undistorted image of the visual surround onto the neural retina. The first pre-requisite, therefore, is that the tissue should be transparent. Despite the presence of remarkably high levels of protein, the lens cytosol remains transparent as a result of short-range-order interactions between the proteins. At a cellular level, the programmed elimination of nuclei and other light-scattering organelles from cells located within the pupillary space contributes directly to tissue transparency. Scattering at the cell borders is minimized by the close apposition of lens fibre cells facilitated by a plethora of adhesive proteins, some expressed only in the lens. Similarly, refractive index matching between lens membranes and cytosol is believed to minimize scatter. Refractive index matching between the cytoplasm of adjacent cells is achieved through the formation of cellular fusions that allow the intermingling of proteins. Together, these structural adaptations serve to minimize light scatter and enable this living, cellular structure to function as ‘biological glass’.

scholarly journals Transcriptional regulation of structural and functional adaptations in a developing adulthood myocardium

2020 ◽  
Author(s):  
Sini Sunny ◽  
Anil Kumar Challa ◽  
Joseph Barchue ◽  
Muralidharan T. Ramamurthy ◽  
David K Crossman ◽  
...  
Keyword(s):  
Transcriptional Regulation ◽  
Signaling Pathways ◽  
Redox Homeostasis ◽  
Progressive Decline ◽  
Functional Changes ◽  
Adult Mice ◽  
Cycle Growth ◽  
Myocardial Development ◽  
Transcriptional Changes ◽  
Structural Adaptations

AbstractThe development of the heart follows a synergic action of several signaling pathways during gestational, pre- & postnatal stages. The current study aimed to investigate whether the myocardium experiences transcriptional changes during the transition from post-natal to adult hood stages. Herein, we used C57/Bl6/J mice at 4 (28-days; post-natal/PN) and 20 weeks (adulthood/AH) of ages and employed the next generation RNAseq (NGS) to profile the transcriptome and echocardiography analysis to monitor the structural/functional changes in the heart. NGS-based RNA-seq revealed that 1215 genes were significantly upregulated and 2549 were down regulated in the AH versus PN hearts, indicating a significant transcriptional change during this transition. A synchronized cardiac transcriptional regulation through cell cycle, growth hormones, redox homeostasis and metabolic pathways was noticed in both PN and AH hearts. Echocardiography reveals significant structural and functional (i.e. systolic/diastolic) changes during the transition of PN to adult stage. Particularly, a progressive decline in ejection fraction (EF) and cardiac output was observed in AH hearts. These structural adaptations are in line with critical signaling pathways that drive the maturation of heart during AH. Overall, we have presented a comprehensive transcriptomic analysis along with structural-functional relationship during the myocardial development in adult mice.

The epidermis in Passerina/ (Thymelaeaceae): structure, function and taxonomic significance

Bothalia ◽  
2000 ◽  
Vol 30 (1) ◽  
pp. 69-86 ◽  
Author(s):  
C. L. Bredenkamp ◽  
A. E. Van Wyk
Keyword(s):  
Cell Walls ◽  
Mediterranean Climate ◽  
High Light Intensity ◽  
Epidermal Cells ◽  
Cell Orientation ◽  
Abaxial Surface ◽  
Epidermal Structure ◽  
Interspecific Differences ◽  
Epidermal Features ◽  
Structural Adaptations

Epidermal features were studied in all 17 species of Passerina, a genus endemic to southern Africa. Leaves in Passerina are inversely ericoid, the adaxial surface concave and the abaxial surface convex. Leaves are inversely dorsiventral and epistomatic. The adaxial epidermis is villous, with unicellular, uniseriate trichomes and relatively small thin-walled cells, promoting flexibility of leaf margins owing to turgor changes. In common with many other Thymelaeaceae, abaxial epidermal cells are large and tanniniferous with mucilaginous cell walls. The cuticle is adaxially thin, but abaxially well devel­oped, probably enabling the leaf to restrict water loss and to tolerate high light intensity and UV-B radiation. Epicuticular waxes, present in all species, comprise both soft and plate waxes. Epidermal structure proves to be taxonomically impor­tant at family, genus and species levels. Interspecific differences include arrangement of stomata and presence or absence of abaxial epidermal hair. Other diagnostic characters of the abaxial epidermal cells are arrangement,size and shape, cutic- ular ornamentation and presence or absence of wax platelets. Two groups of species on the basis of abaxial epidermal cell orientation are recognised. Many leaf epidermal features in Passerina are interpreted as structural adaptations to the Mediterranean climate of the Cape.

scholarly journals Structural adaptations in the interaction of EcoRI endonuclease with methylated GAATTC sites.

1996 ◽  
Vol 15 (11) ◽  
pp. 2870-2882 ◽  
Author(s):  
L. Jen-Jacobson ◽  
L. E. Engler ◽  
D. R. Lesser ◽  
M. R. Kurpiewski ◽  
C. Yee ◽  
...  
Keyword(s):  
Structural Adaptations

American Culture and the (Permanent, Global) Cold War (on Terror)

2020 ◽  
Vol 32 (2) ◽  
pp. 354-364
Author(s):  
Jonathan Vincent
Keyword(s):  
Cold War ◽  
Review Essay ◽  
War On Terror ◽  
American Culture ◽  
War On Drugs ◽  
Industrial Complex ◽  
Scholarly Work ◽  
Military Industrial Complex ◽  
Global Cold War ◽  
Structural Adaptations

Abstract This review-essay considers recent scholarly work that, in contrast to our understanding of the Cold War’s demise 30 years ago, examines the lingering practices of permanent militarization that have nonetheless continued to flourish. Focusing especially on the cultural habits that normalize permanent war—a necessary supplement since the Cold War’s justifying logics no longer adhere—they together enlarge a picture of the dyadic or double-jointed projects of a transforming military–industrial complex occurring at all manner of points internationally as well as in a range of locales internal to US life, and in ways that are structurally linked. At the heart of that critique is disclosing the way that the adapting discourses of a liberalizing American state downplay and reframe the older, more overt rhetorics of colonialism and imperialism while nonetheless retaining similar expansionist and disciplinary goals. Using the literary and cultural record of those structural adaptations, they document how the twin arms of that coordinated state power worked relentlessly to manage “neocolonial” interventions across the globe, well into the “forever wars” of our own time, as well as, simultaneously, to interfere in and subdue the civil right movement or prosecute the War on Drugs domestically.

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