The Possible Relationship of Starch and Phytoglycogen in Sweet Corn. I. Characterization of Particulate and Soluble Polysaccharides

1981 ◽  
Vol 33 (4) ◽  
pp. 125-130 ◽  
Author(s):  
C. D. Boyer ◽  
P. A. Damewood ◽  
E. K. G. Simpson
Keyword(s):  
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.


2020 ◽  
Vol 15 (1) ◽  
pp. 258-265
Author(s):  
Yu Zhou ◽  
Daoguang Mu ◽  
Xinfeng Dong

AbstractS-box is the basic component of symmetric cryptographic algorithms, and its cryptographic properties play a key role in security of the algorithms. In this paper we give the distributions of Walsh spectrum and the distributions of autocorrelation functions for (n + 1)-bit S-boxes in [12]. We obtain the nonlinearity of (n + 1)-bit S-boxes, and one necessary and sufficient conditions of (n + 1)-bit S-boxes satisfying m-order resilient. Meanwhile, we also give one characterization of (n + 1)-bit S-boxes satisfying t-order propagation criterion. Finally, we give one relationship of the sum-of-squares indicators between an n-bit S-box S0 and the (n + 1)-bit S-box S (which is constructed by S0).


1976 ◽  
Vol 58 (1) ◽  
pp. 28-32 ◽  
Author(s):  
Jorge W. Gonzales ◽  
Ashby M. Rhodes ◽  
David B. Dickinson
Keyword(s):  

Author(s):  
A.C. Croce ◽  
G. Bottiroli

Native fluorescence, or autofluorescence (AF), consists in the emission of light in the UV-visible, near-IR spectral range when biological substrates are excited with light at suitable wavelength. This is a well-known phenomenon, and the strict relationship of many endogenous fluorophores with morphofunctional properties of the living systems, influencing their AF emission features, offers an extremely powerful resource for directly monitoring the biological substrate condition. Starting from the last century, the technological progresses in microscopy and spectrofluorometry were convoying attention of the scientific community to this phenomenon. In the future, the interest in the autofluorescence will certainly continue. Current instrumentation and analytical procedures will likely be overcome by the unceasing progress in new devices for AF detection and data interpretation, while a progress is expected in the search and characterization of endogenous fluorophores and their roles as intrinsic biomarkers.


1996 ◽  
Vol 61 (1) ◽  
pp. 253-257 ◽  
Author(s):  
FERMIN AZANZA ◽  
BARBARA P. KLEIN ◽  
JOHN A. JUVIK

2004 ◽  
Vol 28 (1) ◽  
pp. 15-49
Author(s):  
Simon Perry

Mussorgsky's Sunless cycle is aesthetically and stylistically an anomalous member of his oeuvre. Its notably effaced, pared-down, and withdrawn qualities present challenges to critical interpretation. Its uniqueness, however, renders it a crucial work for furnishing the fullest possible picture of Mussorgsky as a creative artist. The author of its texts, Golenishchev-Kutuzov (whose relationship with Mussorgsky at the time of its writing possibly extended beyond the platonic) has been identified by recent scholarship as an essential "eye-witness" for those to whom Stasov's populist characterization of the composer does not ring entirely true. Golenishchev-Kutuzov believed that in Sunless Mussorgsky first revealed his authentic artistic self. According to Golenishchev-Kutuvoz, Mussorgsky regarded his signal achievement in Sunless to have been the eradication of all elements other than "feeling." In other words, he had thrown off the stylistic shackles imposed by the aesthetics of realism and relied entirely on intuitive harmonic invention as the sole conveyor of a purely subjective, "affective" meaning in the cycle. This hypothesis forms the point of departure for an investigation of select numbers of the cycle. Analysis reveals that the affective aspect is not the only significant element operative. Alongside remnants of the realist style, there is evidence, of varying degrees of subtlety, for a knowing use of symmetrical pitch organization. Mussorgsky not only adapted the usual referential attachments of symmetrically based chromaticism--typically found in Russian operas of the second half of the nineteenth century--he also, through extremely simple but effective means, synthesized the "intuitive" harmonic and "rational" symmetrical elements of the cycle's pitch organization so that the latter emerges seamlessly out of the former. This remarkable synthesis ensures the cycle's uniformity of tone while also allowing for a reading that extends beyond the generally affective to the symbolically more specific. This symbolic level of reading offers several interpretative possibilities, one of which may refer even to the relationship of the poet and the composer. Irrespective of such potentials for interpretation, the most significant achievement in the cycle remains the synthesis of the intuitive/affective and rational/symbolic elements of its organization. Songs 1, 2, 3, and 6 of the cycle are considered in detail.


1953 ◽  
Vol 30 (1) ◽  
pp. 92-107
Author(s):  
Charles E. Higbie ◽  
Granville Price ◽  
Armistead S. Pride ◽  
Donald E. Brown ◽  

The literature concerned with communications in American magazines during the last quarter of 1952 was overwhelmingly dominated by the subject of the relationship of radio and the press to the presidential campaign. While the election itself was resolved definitely in favor of Eisenhower, it became more and more evident that press institutions themselves in the United States may soon face a virtual decision at the bar of public opinion in regard to their ideal role in national life. Marking the main skirmish line for the three months in question was the phrase “one-party press” which bounded from a political speech by defeated-candidate Stevenson in early September into almost every written or spoken discussion of the press since that time. Means of disproving or proving this characterization of U. S. newspapers has been the main topic of discussion at many conventions and conferences of such diversified groups as publishers, editors, union leaders, educators, congressmen, women's clubs and politicians as evidenced by following bibliography entries. Also numerous have been outright attempts at proof and disclaimer by various speakers and writers. Also of note during the quarter were the number of articles by pollsters defining their exact position in regard to pre-election opinion figures. Most managed to be both safe and sorry, since the growing corps of polling critics contributed a great number of articles following the election pointing out ignored evidence on Eisenhower's strength with great statistical accuracy.


Sign in / Sign up

Export Citation Format

Share Document