The Slope Ratio Method:  A Simple and Accurate Method to Extract the First Hyperpolarizability from EFISH Measurements

1997 ◽  
Vol 101 (38) ◽  
pp. 7176-7181 ◽  
Author(s):  
Chang Sheng Liu ◽  
Rainer Glaser ◽  
Paul Sharp ◽  
John F. Kauffman
Keyword(s):  
Accurate Method ◽  
Ratio Method ◽  
First Hyperpolarizability ◽  
Slope Ratio ◽  
Slope Ratio Method

The Slope-Ratio Method of Rose and Cuttita

1972 ◽  
Vol 26 (2) ◽  
pp. 311-312 ◽  
Author(s):  
H. A. Liebhafsky ◽  
H. G. Pfeiffer ◽  
P. D. Zemany
Keyword(s):  
Ratio Method ◽  
Slope Ratio ◽  
Slope Ratio Method

Analysis about Stability of a Slope

2014 ◽  
Vol 580-583 ◽  
pp. 152-155
Author(s):  
Ya Jun Yin ◽  
Guang Han Xu ◽  
Yong Mei Qian
Keyword(s):  
Numerical Simulation ◽  
Slope Stability ◽  
Ratio Method ◽  
Stability Evaluation ◽  
Slope Ratio ◽  
Geological Conditions ◽  
Slope Ratio Method

Based on the engineering geological conditions of an artificial slope is analyzed using a combination of numerical simulation, the slope ratio method and other methods, the slope stability was evaluated, It has a certain reference to artificial slope stability evaluation that similar to a combination of soil and rock.

scholarly journals FORMULA ESTABLISHMENT OF COLORLESS Pb(II) COMPLEX WITH N-BENZOYL-N-PHENYL HYDROXYLAMINE (BPA) USING ATOMIC ABSORPTION SPECTROSCOPY

2012 ◽  
Vol 12 (1) ◽  
pp. 12-19 ◽  
Author(s):  
Dhananjay B Sarode ◽  
Sopan T Ingle ◽  
Sanjay B Attarde
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Variation Method ◽  
Ratio Method ◽  
Slope Ratio ◽  
Mole Ratio Method ◽  
Continuous Variation Method ◽  
Slope Ratio Method

A new method for determination of stoichiometry of colorless complexes by using atomic absorption spectrophotometric technique in continuous variation method and slope ratio method was described here. This method can be used in same manner as that of mole ratio method and slope ratio method. In this method atomic absorption spectroscopy was used instead of UV-Vis spectrophotometry. Atomic absorption spectrophotometric technique is superior to UV-Vis spectrophotometry as it can be applied to colorless soluble complexes. Pb(II) and n-benzoyl-n-phenyl hydroxylamine react to form colorless complex at pH 6.5, which can be easily determined by this method. It was found that Pb(II) forms 1:2 complex with n-benzoyl-n-phenyl hydroxylamine and is quantitatively extracted back to aqueous solution for AAS analysis.

Solvent Extraction and Spectrophotometric Determination of Uranium (VI) Using 2,2′-[1,2-phenylenebis(nitrilomethylidene)]bisphenol (BSOPD) as an Analytical Reagent

2013 ◽  
Vol 12 ◽  
pp. 125-133 ◽  
Author(s):  
Sebastian Satya ◽  
Pravin U. Singare ◽  
R.S. Lokhande
Keyword(s):  
Molar Absorptivity ◽  
Variation Method ◽  
Ratio Method ◽  
Slope Ratio ◽  
Masking Agents ◽  
Mole Ratio Method ◽  
Intense Absorption ◽  
Analytical Reagent ◽  
Slope Ratio Method

2,2'-[1,2-phenylenebis(nitrilomethylidene)]bisphenol (BSOPD) is synthesized in the laboratoryand characterized by NMR, IR and elemental analysis for its purity. This reagent forms a yellowcomplex with U(VI) which can be quantitatively extracted into chloroform at pH 10. This complex inchloroform shows an intense absorption peak at 413.0 nm. It is observed that Beer’s law is obeyed inthe range of 2.0-10.0 ppm of metal solution. It gives a linear and reproducible graph under appropriateconditions, the complex having a molar absorptivity of 3.69 x 104 L mol-1·cm-1. Sandell’s sensitivitycalculated was found to be 4.4 x 10-3μg·cm-2. Nature of the extracted complex, determined by Job’scontinuous variation method, Slope ratio method and Mole ratio method shows that the compositionof U(VI) : BSOPD complex is 1:4. Interference by various ions is studied and masking agents usedwhere required. The proposed method has been applied for the determination of U(VI) in monazite sand and synthetic samples. The results of the analysis are found to be comparable with those obtained by standard method.

Novel Quantitative Assays for Estimating the Antimicrobial Activity of Fresh Garlic Juice†,‡

2001 ◽  
Vol 64 (2) ◽  
pp. 189-194 ◽  
Author(s):  
R. UNAL ◽  
H. P. FLEMING ◽  
R. F. McFEETERS ◽  
R. L. THOMPSON ◽  
F. BREIDT ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Dose Response ◽  
Ratio Method ◽  
E Coli ◽  
Agar Diffusion ◽  
Dilution Assay ◽  
Agar Diffusion Assay ◽  
Slope Ratio Method ◽  
Diffusion Assay ◽  
Broth Dilution

Novel agar diffusion and broth dilution assays were developed for quantitatively estimating the antimicrobial activity of fresh garlic juice. Bacteria found to be inhibited by garlic juice in agar diffusion assay included two gram-positive and five gram-negative species. Leuconostoc mesenteroides was not inhibited. Escherichia coli B-103 (HB101, with pJH101, ampicillin resistant, 100 μg ml−1) was inhibited and chosen as the standard culture for quantitative assays. The agar diffusion assay was based on the slope ratio method, where the slope of dose response for garlic juice was divided by the slope of dose response for methylmethane thiosulfonate (MMTSO2). Juice from fresh garlic varied in activity between 1.76 and 2.31 μg of MMTSO2 per mg of garlic juice. The activity of juice decreased during 11 months of storage of garlic cloves at 5°C from 2.31 to less than 0.1 μg of MMTSO2 per mg of juice. The broth dilution assay also used the E. coli B-103 culture, which permitted selective enumeration of this bacterium when 100 μg ml−1 of ampicillin was incorporated into the enumerating agar. Selective enumeration was essential since the garlic juice was not sterile and, thus, contained natural flora. Growth of E. coli was unaffected by 0.1%, delayed by 0.25%, and completely inhibited at 0.5 and 2% garlic juice in broth during 24 h of incubation at 37°C. The minimum inhibition concentration of garlic juice by broth dilution assay was, thus, estimated to be 0.5%, which is equivalent to 3.46 μg of MMTSO2 per mg of garlic juice by the agar diffusion assay.

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