Important Site of Luciferin on Firefly Bioluminescence

2019 ◽  
Vol 16 (18) ◽  
pp. 1-2 ◽  
Author(s):  
Shojiro A. Maki
Author(s):  
O. T. Minick ◽  
E. Orfei ◽  
F. Volini ◽  
G. Kent

Hemolytic anemias were produced in rats by administering phenylhydrazine or anti-erythrocytic (rooster) serum, the latter having agglutinin and hemolysin titers exceeding 1:1000.Following administration of phenylhydrazine, the erythrocytes undergo oxidative damage and are removed from the circulation by the cells of the reticulo-endothelial system, predominantly by the spleen. With increasing dosage or if animals are splenectomized, the Kupffer cells become an important site of sequestration and are greatly hypertrophied. Whole red cells are the most common type engulfed; they are broken down in digestive vacuoles, as shown by the presence of acid phosphatase activity (Fig. 1). Heinz body material and membranes persist longer than native hemoglobin. With larger doses of phenylhydrazine, erythrocytes undergo intravascular fragmentation, and the particles phagocytized are now mainly red cell fragments of varying sizes (Fig. 2).


2003 ◽  
Vol 154 (7) ◽  
pp. 281-288
Author(s):  
Kurt Steck

A targeted nurturing of oak in the canton of Argovia goes against the natural development of forest stands where the dominant, naturally occurring species is beech. Because of this,afforestation with oak is both work intensive and costly and is therefore concentrated on sites where silvicultural, economical and ecological aspects have been taken into account. With the help of a simple model showing areas where, above all,oak is nurtured, comprehensively mapped forest stands were classed according to competitiveness and correlated to thermal levels, that represent an important site factor for oak. One important aspect surrounding the issue is the preservation of genetic resources and an adequate supply of appropriate seed from chosen autochthonal, indigenous oak stands. In addition,the endangered population of middle spotted woodpecker,which is tied to widespread sites of aged oak-rich deciduous stands, should be fostered. Taking ecological priorities into account a possible area to nurture oak has been demarcated in the Fricktal.


2021 ◽  
Vol 49 (1) ◽  
pp. 55-72
Author(s):  
Robert D. Aguirre

Eadweard Muybridge's Pacific Coast photographs provide an important site for investigating Victorian visual practices of the “wide.” They do not simply expand a referential frame to encompass novel subjects; they also, and more critically, register powerful narratives of temporality and modernity. This essay's analysis of the “wide” as an incipient concept of critical spatiality is not set against the more familiar temporal dimension of the long nineteenth century (a false and ultimately unproductive opposition). Rather, it places these two concerns in some tension with each other, though the argument is less about periodicity than about the representation of timescales in nineteenth-century media. In Muybridge's photographs, thinking about the representational possibilities of width is impossible without also confronting temporality. The Pacific Coast photographs are important both as explorations of timescales and artifacts in an influential nineteenth-century medium and prompts to reconsider the politico-economic networks that were central to the progress of expeditionary photography itself.


1955 ◽  
Vol 20 (2) ◽  
pp. 131-154 ◽  
Author(s):  
R. G. West ◽  
C. M. B. McBurney

The long history of investigations at Hoxne, Suffolk, beginning when John Frere discovered Palaeolithic implements there in the last decade of the eighteenth century, has been described by Moir. Moir himself worked on the deposits at Hoxne, and the results of his investigations, together with those of Reid, have formed the basis for our knowledge of the geology and archaeology of the deposits. From these investigations it is clear that Hoxne is an important site, for it is one of the rare places where there are interglacial lake deposits and Palaeolithic implements in direct association with ground moraines of the older glaciations. Moreover, the deposits occupy a well-known position in the East Anglian Quaternary succession.


ChemPhysChem ◽  
2011 ◽  
Vol 12 (5) ◽  
pp. 951-960 ◽  
Author(s):  
Luís Pinto da Silva ◽  
Joaquim C. G. Esteves da Silva

2008 ◽  
Vol 35 (4) ◽  
pp. 346 ◽  
Author(s):  
Tricia K. Franks ◽  
Abbas Yadollahi ◽  
Michelle G. Wirthensohn ◽  
Jennifer R. Guerin ◽  
Brent N. Kaiser ◽  
...  

The secondary metabolite amygdalin is a cyanogenic diglucoside that at high concentrations is associated with intense bitterness in seeds of the Rosaceae, including kernels of almond (Prunus dulcis (Mill.), syn. Prunus amygdalus D. A. Webb Batsch). Amygdalin is a glucoside of prunasin, itself a glucoside of R-mandelonitrile (a cyanohydrin). Here we report the isolation of an almond enzyme (UGT85A19) that stereo-selectively glucosylates R-mandelonitrile to produce prunasin. In a survey of developing kernels from seven bitter and 11 non-bitter genotypes with polyclonal antibody raised to UGT85A19, the enzyme was found to accumulate to higher levels in the bitter types in later development. This differential accumulation of UGT85A19 is associated with more than three-fold greater mandelonitrile glucosyltransferase activity in bitter kernels compared with non-bitter types, and transcriptional regulation was demonstrated using quantitative-PCR analysis. UGT85A19 and its encoding transcript were most concentrated in the testa (seed coat) of the kernel compared with the embryo, and prunasin and amygdalin were differentially compartmentalised in these tissues. Prunasin was confined to the testa and amygdalin was confined to the embryo. These results are consistent with the seed coat being an important site of synthesis of prunasin as a precursor of amygdalin accumulation in the kernel. The presence of UGT85A19 in the kernel and other tissues of both bitter and non-bitter types indicates that its expression is unlikely to be a control point for amygdalin accumulation and suggests additional roles for the enzyme in almond metabolism.


Author(s):  
Ruth McGinity

This chapter reports on data and analysis to theorise the role that both corporate and political elites played in the development and enactment of localised policy-making at Kingswood Academy; a secondary school in the North of England. The analysis offered reveals how a single case-study school provides an important site to explore the ways in which the educational policy environment provides the conditions for elites to play a significant role in the development and delivery of localised policy processes in England. Bourdieu (1986; 1992) provides the thinking tools to undertake this theoretical and intellectual work, and I deploy his conceptualisation of misrecognition as a means of interrogating how the involvement of corporate and political elites in the processes of localised policy-making reproduces the hierarchised power of particular networks, which ultimately contribute to the privatisation of educational ‘goods’ as marketised commodities.


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