Study on liquid nitrogen and carbon dioxide combined jet quick-frozen strawberry

2022 ◽  
Author(s):  
Yanfeng Zhao ◽  
Jinghong Ning ◽  
Zhaoyang Sun
Keyword(s):  
Carbon Dioxide ◽  
Liquid Nitrogen

scholarly journals The Use of Cryogenic Temperature Gas Chromatography for the Determination of Carbon Monoxide and Carbon Dioxide in Cigarette Smoke

1972 ◽  
Vol 6 (4) ◽  
Author(s):  
G.P. Morie ◽  
C.H. Sloan
Keyword(s):  
Carbon Dioxide ◽  
Gas Chromatography ◽  
Carbon Monoxide ◽  
Liquid Nitrogen ◽  
Cigarette Smoke ◽  
Cryogenic Temperature ◽  
Chromatographic Method ◽  
Porapak Q ◽  
Gas Chromatographic Method

AbstractA gas chromatographic method for the determination of carbon monoxide and carbon dioxide in cigarette smoke was developed. A column containing Porapak Q packing and a cryogenic temperature programmer which employed liquid nitrogen to cool the column to subambient temperatures was used. The separation of N

scholarly journals Southern Methodist University Radiocarbon Date List I

Radiocarbon ◽  
1974 ◽  
Vol 16 (3) ◽  
pp. 368-380 ◽  
Author(s):  
Vance Haynes ◽  
Herbert Haas
Keyword(s):  
Carbon Dioxide ◽  
Liquid Nitrogen ◽  
Chromic Acid ◽  
Radiocarbon Date ◽  
Synthesis System ◽  
Southern Methodist University ◽  
Geological Sciences

The SMU Radiocarbon Laboratory is operated by the Department of Geological Sciences within the Institute for the Study of Earth and Man. One laboratory room contains the benzene synthesis system where samples are pretreated and converted to CO2 in a standard way and gas is purified after the procedures of Broecker (1957) by passage through hot CuO, 10% AgNO3 solution, chromic acid, hot copper, and P2O5 via cryogenic pumping with liquid nitrogen. Purified CO2 is then converted to Li2C2 which is hydrolized to C2H2 and converted to C6H6 catalytically following the procedures of Noakes et al (1966). Carbon dioxide and benzene yields are routinely in excess of 90% in both cases.

Measurement of Rake Face Temperature in Cryogenic Machining of Titanium Alloy

2020 ◽  
Author(s):  
Masahiko Sato ◽  
Masashi Kamoto
Keyword(s):  
Carbon Dioxide ◽  
Titanium Alloy ◽  
Optical Fiber ◽  
Liquid Nitrogen ◽  
Cutting Tool ◽  
Weight Ratio ◽  
Rake Face ◽  
Cryogenic Machining ◽  
Tool Insert ◽  
Face Temperature

Abstract Titanium alloys are widely used as mechanical components, since they have superior properties such as high strength-to-weight ratio. They are regarded as difficult-to-cut materials. Their low thermal conductivity increases the temperature near the cutting edge, which causes excessive tool wear during cutting. Recently, many studies on cryogenic machining have been conducted. Cryogenic machining has emerged as an environmentally friendly alternative to traditional emulsion coolants. In this study, the rake face temperatures of cutting tool in the turning of titanium alloy under dry, soluble coolant, cryogenic carbon dioxide coolant and liquid nitrogen coolant conditions were measured to clarify the effect of coolant on cutting temperature. Turning tests were performed using a precision lathe. Tool insert was made by a translucent alumina. A small hole was drilled into the tool insert. An infrared radiation pyrometer with an optical fiber was used. The optical fiber was inserted into the hole. During chip formation, the infrared rays, radiated from the tool-chip interface and transmitted through the cutting tool, were accepted and transmitted by the optical fiber. The effects of cryogenic coolant on the rake face temperature were investigated. The rake face temperatures under carbon dioxide cooling and liquid nitrogen cooling were approximately 60 °C and 90 °C lower than that in dry cutting, respectively.

Effect of Combinations of Fresh and Frozen Beef on Microbial Flora of Ground Beef Patties

1981 ◽  
Vol 44 (11) ◽  
pp. 870-873 ◽  
Author(s):  
A. A. KRAFT ◽  
K. V. REDDY ◽  
J. G. SEBRANEK ◽  
R. E. RUST ◽  
D. K. HOTCHKISS
Keyword(s):  
Carbon Dioxide ◽  
Liquid Nitrogen ◽  
Frozen Storage ◽  
Ground Beef ◽  
Microbial Flora ◽  
Liquid Carbon ◽  
Bacterial Counts ◽  
Liquid Carbon Dioxide ◽  
Beef Patties

Beef patties composed of fresh beef, blast frozen beef or combinations of fresh and frozen beef were then frozen by liquid nitrogen (LN2) or liquid carbon dioxide (LCO2) and stored at −20 C for 6 months. Analyses for various bacteria were made at monthly intervals to evaluate effects of originally combining fresh and frozen beef on the subsequent microbial flora. Of the different combinations of fresh and frozen meat, the mixture in a 50:50 ratio produced highest bacterial numbers during frozen storage. Lowest bacterial counts resulted from use of fresh beef with no blast frozen meat but frozen subsequently with LN2 or LCO2.

INFLUENCE OF LIQUID NITROGEN, LIQUID CARBON DIOXIDE AND MECHANICAL FREEZING ON SENSORY PROPERTIES OF GROUND BEEF PATTIES

1978 ◽  
Vol 43 (3) ◽  
pp. 842-844 ◽  
Author(s):  
J. G. SEBRANEK ◽  
P. N. SANG ◽  
R. E. RUST ◽  
D. G. TOPEL ◽  
A. A. KRAFT
Keyword(s):  
Carbon Dioxide ◽  
Liquid Nitrogen ◽  
Ground Beef ◽  
Sensory Properties ◽  
Liquid Carbon ◽  
Liquid Carbon Dioxide ◽  
Beef Patties
Sign in / Sign up

Export Citation Format

Share Document