scholarly journals Development and Evaluation of Environmentally Friendly Lubricantfor Cold Metal Working

2011 ◽  
Vol 52 (603) ◽  
pp. 474-479 ◽  
Author(s):  
Hiroshi OHYAMA ◽  
Masayoshi AKIYAMA
Keyword(s):  
Environmentally Friendly ◽  
Metal Working ◽  
Cold Metal

Cold metal working

1932 ◽  
Vol 11 (4) ◽  
pp. 150
Author(s):  
H.G. Povey
Keyword(s):  
Metal Working ◽  
Cold Metal

Wrought Metal-Working Prior to Middle Shang (?)—A Problem in Archaeological and Art-Historical Research Approaches

Early China ◽  
1981 ◽  
Vol 6 ◽  
pp. 4-30 ◽  
Author(s):  
Noel Barnard
Keyword(s):  
Sheet Metal ◽  
Historical Research ◽  
Metal Casting ◽  
Metal Working ◽  
Metal Workers ◽  
Cold Metal ◽  
Direct Casting

AbstractThe existence of certain types of Lung-shan pottery vessels and early Shang bronzes based upon supposed wrought metal prototypes continues to lead some scholars to the conclusion that these cultures had knowledge of sheet metal, smithy techniques. An analysis of such features as the tubular spout, projecting ledges, imitation “rivets,” and imitation folded rims leads to the conclusion that their presence is accounted for either by the versatility of the Neolithic potters, by the requirements of metal casting techniques, or by decorative considerations; it need not, and frequently cannot, be explained in terms of sheet metal prototypes. The article also considers the nature and significance of various cold metal working techniques, such as annealing. In the view of the wrought-metal advocates, these techniques would have had to have been discarded and forgotten by the early Chinese metal workers in favor of direct casting in piece-mold assemblies. This is highly unlikely.

Discussion on “Cold metal working” at the Coventry Section of the Institution

1932 ◽  
Vol 11 (4) ◽  
pp. 156
Author(s):  
Drane ◽  
Povey ◽  
Newbold ◽  
R.H. Jones ◽  
Macnab ◽  
...  
Keyword(s):  
Metal Working ◽  
Cold Metal

High-pressure freezing and freeze substitution of plant tissue

1992 ◽  
Vol 50 (1) ◽  
pp. 748-749
Author(s):  
William P. Sharp ◽  
Robert W. Roberson
Keyword(s):  
High Pressure ◽  
Cell Structure ◽  
Leaf Tissue ◽  
Freeze Substitution ◽  
Crystal Formation ◽  
Ice Crystal ◽  
High Pressure Freezing ◽  
Cell Components ◽  
Cold Metal ◽  
Brome Grass

The aim of ultrastructural investigation is to analyze cell architecture and relate a functional role(s) to cell components. It is known that aqueous chemical fixation requires seconds to minutes to penetrate and stabilize cell structure which may result in structural artifacts. The use of ultralow temperatures to fix and prepare specimens, however, leads to a much improved preservation of the cell’s living state. A critical limitation of conventional cryofixation methods (i.e., propane-jet freezing, cold-metal slamming, plunge-freezing) is that only a 10 to 40 μm thick surface layer of cells can be frozen without distorting ice crystal formation. This problem can be allayed by freezing samples under about 2100 bar of hydrostatic pressure which suppresses the formation of ice nuclei and their rate of growth. Thus, 0.6 mm thick samples with a total volume of 1 mm3 can be frozen without ice crystal damage. The purpose of this study is to describe the cellular details and identify potential artifacts in root tissue of barley (Hordeum vulgari L.) and leaf tissue of brome grass (Bromus mollis L.) fixed and prepared by high-pressure freezing (HPF) and freeze substitution (FS) techniques.

Are BMP Criteria Really Environmentally Friendly

WRPMD'99 ◽  
1999 ◽  
Author(s):  
Larry A. Roesner ◽  
Robert W. Brashear
Keyword(s):  
Environmentally Friendly

Environmentally Friendly Preparation of Magnetic Composites Featuring Proteolytic Properties

INEOS OPEN ◽  
2020 ◽  
Author(s):  
N. A. Samoilova ◽  
Keyword(s):  
Enzyme Immobilization ◽  
Maleic Acid ◽  
Environmentally Friendly ◽  
Synthetic Polymer ◽  
Magnetic Composites ◽  
Interpolyelectrolyte Complex ◽  
Hydrolysis Rates ◽  
Poly Ethylene ◽  
Noncovalent Binding

The enzyme-containing magnetic composites are presented. The magnetic matrix for enzyme immobilization is obtained by sequential application of an amine-containing polysaccharide—chitosan and a synthetic polymer—poly(ethylene-alt-maleic acid) to the magnetite microparticles to form the interpolyelectrolyte complex shell. Then, the enzyme (trypsin) is immobilized by covalent or noncovalent binding. Thus, the suggested composites can be readily obtained in the environmentally friendly manner. The enzyme capacity of the resulting composites reaches 28.0–32.6 mg/g. The maximum hydrolysis rates of the H-Val-Leu-Lys-pNA substrate provided by these composites range within 0.60·10–7–0.77·10–7 M/min.

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