Chemistry of enolates from zinc reduction of .alpha.-bromo ketones. New method of substitution .alpha. to carbonyl groups

1967 ◽  
Vol 89 (22) ◽  
pp. 5727-5729 ◽  
Author(s):  
Thomas A. Spencer ◽  
Ronald W. Britton ◽  
David S. Watt
Keyword(s):  
New Method ◽  
Carbonyl Groups ◽  
Zinc Reduction

ChemInform Abstract: Addition of Aromatic C-H Bonds to Terminal Metal-Carbonyl Groups. A New Method for Cyclocarbonylation of Aromatic Groups.

ChemInform ◽  
2010 ◽  
Vol 31 (1) ◽  
pp. no-no
Author(s):  
Yi-Ru Wu ◽  
Gia-Hsian Lin ◽  
Reniguntala J. Madhushaw ◽  
Keh-Ming Horng ◽  
Chu-Chen Hu ◽  
...  
Keyword(s):  
Metal Carbonyl ◽  
New Method ◽  
Carbonyl Groups

Addition of Aromatic C−H Bonds to Terminal Metal−Carbonyl Groups. A New Method for Cyclocarbonylation of Aromatic Groups

1999 ◽  
Vol 18 (18) ◽  
pp. 3566-3568 ◽  
Author(s):  
Yi-Ru Wu ◽  
Gia-Hsian Lin ◽  
Reniguntala J. Madhushaw ◽  
Keh-Ming Horng ◽  
Chu-Chen Hu ◽  
...  
Keyword(s):  
Metal Carbonyl ◽  
New Method ◽  
Carbonyl Groups

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

Chemical and orientational imaging of polymeric samples

1994 ◽  
Vol 52 ◽  
pp. 68-69
Author(s):  
H. Ade ◽  
B. Hsiao ◽  
G. Mitchell ◽  
E. Rightor ◽  
A. P. Smith ◽  
...  
Keyword(s):  
Ethylene Terephthalate ◽  
National Laboratory ◽  
Brookhaven National Laboratory ◽  
Carbonyl Groups ◽  
Aromatic Rings ◽  
Edge Structure ◽  
X Ray ◽  
Scanning Transmission ◽  
Polymeric Samples ◽  
X Ray Absorption

We have used the Scanning Transmission X-ray Microscope at beamline X1A (X1-STXM) at Brookhaven National Laboratory (BNL) to acquire high resolution, chemical and orientation sensitive images of polymeric samples as well as point spectra from 0.1 μm areas. This sensitivity is achieved by exploiting the X-ray Absorption Near Edge Structure (XANES) of the carbon K edge. One of the most illustrative example of the chemical sensitivity achievable is provided by images of a polycarbonate/pol(ethylene terephthalate) (70/30 PC/PET) blend. Contrast reversal at high overall contrast is observed between images acquired at 285.36 and 285.69 eV (Fig. 1). Contrast in these images is achieved by exploring subtle differences between resonances associated with the π bonds (sp hybridization) of the aromatic groups of each polymer. PET has a split peak associated with these aromatic groups, due to the proximity of its carbonyl groups to its aromatic rings, whereas PC has only a single peak.

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method
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