scholarly journals Training the absolute identification of pitch

1970 ◽  
Vol 8 (5) ◽  
pp. 265-269 ◽  
Author(s):  
Lola L. Cuddy
Keyword(s):  
Absolute Identification ◽  
The Absolute

Is measured channel capacity limited by the absolute identification paradigm?

1991 ◽  
Author(s):  
Kenneth A. Deffenbacher ◽  
Francis J. Clark ◽  
M. Elizabeth Davis ◽  
Konney J. Larwood
Keyword(s):  
Channel Capacity ◽  
Absolute Identification ◽  
The Absolute

Identification of saccharides in anthocyanins and other flavonoids

1961 ◽  
Vol 14 (4) ◽  
pp. 586 ◽  
Author(s):  
BV Chandler ◽  
KA Harper
Keyword(s):  
Chemical Reactions ◽  
Paper Chromatography ◽  
The Other ◽  
Flavonoid Glycosides ◽  
Hydroxyl Groups ◽  
Absolute Identification ◽  
Yield Information ◽  
Cyclic Systems ◽  
The Absolute

Procedures have been developed for the determination of the type and location of sugar units present in anthocyanins and other flavonoid glycosides. These procedures are based on standard chemical reactions and have been adapted to a microscale using paper chromatography. Individual flavonoids were found to respond variably to enzymic and chemical hydrolyses, which therefore yield information of limited use only. On the other hand, controlled oxidation has been shown to provide information on the type and position of sugar units attached to the flavonoid nucleus. Degradation using peroxide releases the sugars at the 3-position ; permanganate treatment releases sugars attached to readily ruptured cyclic systems ; and ozonolysis releases sugars attached to phenolic and enolic hydroxyl groups. These three techniques, when used together, can result in the absolute identification of anthocyanins and most other flavonoid glycosides.

A procedure for the absolute identification of anthocyanins: the pigments of blackcurrant fruit

1962 ◽  
Vol 15 (1) ◽  
pp. 114 ◽  
Author(s):  
BV Chandler ◽  
KA Harper
Keyword(s):  
Paper Chromatography ◽  
Column Chromatography ◽  
Absolute Identification ◽  
Black Currant ◽  
Anthocyanin Pigments ◽  
The Absolute ◽  
Blackcurrant Fruit

A procedure is outlined for the isolation of pure anthocyanins and their identification without recourse to comparison with reference glycosides. The isolation involves cellulose and polyamide column chromatography and the identification depends on simple but selective oxidative and hydrolytic reactions, adapted to a microscale using paper chromatography. By this method the anthocyanin pigments present in extracts of black currant fruit have been unequivocally identified as cyanidin and delphinidin, their 3-glucosides and 3-rutinosides.

Bulk standards for low-temperature biological x-ray microanalysis

1984 ◽  
Vol 42 ◽  
pp. 282-283
Author(s):  
P. Echlin ◽  
M. McKoon ◽  
E.S. Taylor ◽  
C.E. Thomas ◽  
K.L. Maloney ◽  
...  
Keyword(s):  
Phase Separation ◽  
Low Temperature ◽  
Analytical Method ◽  
Salt Solutions ◽  
Absolute Concentration ◽  
Cooling Process ◽  
X Ray ◽  
The Absolute ◽  
Analytical Procedures ◽  
Electrical Conductors

Although sections of frozen salt solutions have been used as standards for x-ray microanalysis, such solutions are less useful when analysed in the bulk form. They are poor thermal and electrical conductors and severe phase separation occurs during the cooling process. Following a suggestion by Whitecross et al we have made up a series of salt solutions containing a small amount of graphite to improve the sample conductivity. In addition, we have incorporated a polymer to ensure the formation of microcrystalline ice and a consequent homogenity of salt dispersion within the frozen matrix. The mixtures have been used to standardize the analytical procedures applied to frozen hydrated bulk specimens based on the peak/background analytical method and to measure the absolute concentration of elements in developing roots.

A Quantitative Ultrastructural Study of Peripheral Blood Lymphocytes Containing Parallel Tubular Arrays in Epstein-Barr Virus and Cytomegalo-Virus Mononucleosis

1981 ◽  
Vol 39 ◽  
pp. 454-455
Author(s):  
C. M. Payne ◽  
P. M. Tennican
Keyword(s):  
Peripheral Blood ◽  
Lymphocyte Count ◽  
Epstein Barr Virus ◽  
Absolute Lymphocyte Count ◽  
Peripheral Blood Lymphocytes ◽  
Clinical State ◽  
Barr Virus ◽  
The Absolute ◽  
Epstein Barr ◽  
Tubular Arrays

In the normal peripheral circulation there exists a sub-population of lymphocytes which is ultrastructurally distinct. This lymphocyte is identified under the electron microscope by the presence of cytoplasmic microtubular-like inclusions called parallel tubular arrays (PTA) (Figure 1), and contains Fc-receptors for cytophilic antibody. In this study, lymphocytes containing PTA (PTA-lymphocytes) were quantitated from serial peripheral blood specimens obtained from two patients with Epstein -Barr Virus mononucleosis and two patients with cytomegalovirus mononucleosis. This data was then correlated with the clinical state of the patient.It was determined that both the percentage and absolute number of PTA- lymphocytes was highest during the acute phase of the illness. In follow-up specimens, three of the four patients' absolute lymphocyte count fell to within normal limits before the absolute PTA-lymphocyte count.In one patient who was followed for almost a year, the absolute PTA- lymphocyte count was consistently elevated (Figure 2). The estimation of absolute PTA-lymphocyte counts was determined to be valid after a morphometric analysis of the cellular areas occupied by PTA during the acute and convalescent phases of the disease revealed no statistical differences.

Polarity Determination in Sphalerite and Wurtzite Structures

1990 ◽  
Vol 48 (2) ◽  
pp. 500-501
Author(s):  
Stuart McKernan ◽  
C. Barry Carter
Keyword(s):  
Opposite Polarity ◽  
Single Domain ◽  
Polar Material ◽  
Electron Microscopic ◽  
Dynamical Interaction ◽  
X Ray ◽  
Polarity Determination ◽  
The Absolute ◽  
Microscopic Techniques

The determination of the absolute polarity of a polar material is often crucial to the understanding of the defects which occur in such materials. Several methods exist by which this determination may be performed. In bulk, single-domain specimens, macroscopic techniques may be used, such as the different etching behavior, using the appropriate etchant, of surfaces with opposite polarity. X-ray measurements under conditions where Friedel’s law (which means that the intensity of reflections from planes of opposite polarity are indistinguishable) breaks down can also be used to determine the absolute polarity of bulk, single-domain specimens. On the microscopic scale, and particularly where antiphase boundaries (APBs), which separate regions of opposite polarity exist, electron microscopic techniques must be employed. Two techniques are commonly practised; the first [1], involves the dynamical interaction of hoLz lines which interfere constructively or destructively with the zero order reflection, depending on the crystal polarity. The crystal polarity can therefore be directly deduced from the relative intensity of these interactions.

516: A Simplified Method to Estimate the Absolute Renal Uptake of 99MTC-DMSA: Evaluation with a New Model using the Radioactivity of Nephrectomy Specimens as Reference

2005 ◽  
Vol 173 (4S) ◽  
pp. 140-141
Author(s):  
Mariana Lima ◽  
Celso D. Ramos ◽  
Sérgio Q. Brunetto ◽  
Marcelo Lopes de Lima ◽  
Carla R.M. Sansana ◽  
...  
Keyword(s):  
New Model ◽  
Renal Uptake ◽  
Simplified Method ◽  
The Absolute
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