NUMBER OF RHYACIONIA BUOLIANA (SCHIFF.) PER PINE SHOOT AS A POPULATION INDEX, WITH A RAPID DETERMINATION METHOD OF THIS INDEX AT LOW POPULATION LEVELS

1960 ◽  
Vol 38 (3) ◽  
pp. 475-478 ◽  
Author(s):  
P. Harris
Keyword(s):  
Rapid Determination ◽  
Stem Diameter ◽  
Determination Method ◽  
Population Index ◽  
Good Index ◽  
Large Numbers ◽  
Number Of Individuals ◽  
Diameter Curve ◽  
Number Of Shoots

The number of R. buoliana per shoot is a good index of its abundance in a pine stand; but the determination of the index at low population levels involves counting large numbers of shoots. However, for the conspicuous third instar larvae and older stages it can be determined rapidly by counting the number of individuals present on a tree and estimating the number of shoots by measuring the stem diameter and referring to a predetermined shoot-diameter curve for the stand.

The Potential of Phosphorescence Spectrometry in Clinical Chemistry—The New Generation of Instrumentation and Methodology

1975 ◽  
Vol 21 (3) ◽  
pp. 285-299 ◽  
Author(s):  
C M O'Donnell ◽  
J D Winefordner
Keyword(s):  
Clinical Laboratory ◽  
Decay Curve ◽  
Rapid Determination ◽  
Clinical Chemistry ◽  
Clinical Importance ◽  
Use Of Time ◽  
Recent Advances ◽  
Large Numbers ◽  
New Generation

Abstract We review recent advances in instrumentation and methodology in phosphorimetry that should facilitate the use of phosphorimetry for clinical analyses and recent phosphorescence studies of interest to the clinical chemist. We indicate recent advances, particularly improvements in instrumentation, novel methodologies, and new chemical processes that result in either an increase in sensitivity or selectivity (or both) of measurement of compounds of clinical importance. The greatest use of phosphorimetry in the clinical laboratory will not be for the analysis of very large numbers of samples for one species via automatic instrumentation, but rather will be for the analysis of those molecular species difficult or impossible to measure by conventional methods (colorimetry, fluorometry, etc.). Although various instrumental and methodological advances are discussed separately here, the most important use of these advances in clinical chemistry will undoubtedly be when two or more of them are combined, for example, in the use of time- or frequency-resolved phosphorimetry for the selective measurement of the phosphorescence resulting with inorganic probes and the appropriate choice of solvent and pH (of course, the instrument could contain an image vidicon detector for rapid determination of the spectrum, the decay curve, or both).

A rapid determination method for chemical oxygen demand in aquaculture wastewater using the ultraviolet absorbance spectrum and chemometrics

2014 ◽  
Vol 6 (11) ◽  
pp. 3799-3803 ◽  
Author(s):  
Hong Cao ◽  
Wentai Qu ◽  
Xianglong Yang
Keyword(s):  
Chemical Oxygen Demand ◽  
Rapid Determination ◽  
Oxygen Demand ◽  
Uv Absorbance ◽  
Determination Method ◽  
Absorbance Spectrum ◽  
Fast Determination ◽  
Ultraviolet Absorbance ◽  
Aquaculture Wastewater

The ultraviolet (UV) absorbance spectrum was studied for the fast determination of chemical oxygen demand (COD) in aquaculture wastewater.

Salivary Cortisol Determination: Adaptation of a Commercial Serum Cortisol Kit

1982 ◽  
Vol 19 (3) ◽  
pp. 163-166 ◽  
Author(s):  
A A K Al-Ansari ◽  
L A Perry ◽  
D S Smith ◽  
J Landon
Keyword(s):  
Salivary Cortisol ◽  
Rapid Determination ◽  
Low Cost ◽  
Serum Cortisol ◽  
Large Numbers ◽  
Cortisol Levels ◽  
Gamma Counter ◽  
Commercial Kit ◽  
Serum And Urine

The determination of Cortisol levels in saliva offers a number of significant advantages as compared with plasma or serum measurements, and radioimmunoassay is the technique of choice because of the greater sensitivity required. To date, the assay of salivary Cortisol has been limited to only a few centres employing ‘in-house’ reagents. We describe some simple modifications of a commercial kit, designed for the assay of Cortisol in serum and urine, which allow direct and rapid determination of the steroid in saliva. These modifications enable any laboratory with access to a gamma counter to perform large numbers of salivary Cortisol assays at relatively low cost.

Weak Beam Imaging and Diffraction Studies of Stacking Faults in Silicon

1976 ◽  
Vol 34 ◽  
pp. 590-591
Author(s):  
T. Y. Tan ◽  
W. K. Tice
Keyword(s):  
Fast Neutron ◽  
Rapid Determination ◽  
Stacking Faults ◽  
Imaging Method ◽  
Large Reduction ◽  
Dislocation Loops ◽  
Fringe Spacing ◽  
Weak Beam ◽  
Kinematical Theory

In studying ion implanted semiconductors and fast neutron irradiated metals, the need for characterizing small dislocation loops having diameters of a few hundred angstrom units usually arises. The weak beam imaging method is a powerful technique for analyzing these loops. Because of the large reduction in stacking fault (SF) fringe spacing at large sg, this method allows for a rapid determination of whether the loop is faulted, and, hence, whether it is a perfect or a Frank partial loop. This method was first used by Bicknell to image small faulted loops in boron implanted silicon. He explained the fringe spacing by kinematical theory, i.e., ≃l/(Sg) in the fault fringe in depth oscillation. The fault image contrast formation mechanism is, however, really more complicated.

Methods for rapid determination of pecan (Carya illinoensis) seed viability

2017 ◽  
Vol 45 (2) ◽  
pp. 455-464
Author(s):  
T.T. Xue ◽  
J. Liu ◽  
Y.B. Shen ◽  
G.Q. Liu
Keyword(s):  
Rapid Determination ◽  
Seed Viability ◽  
Carya Illinoensis
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