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dilatomètre à rodage

English translation: precision bore dilatometer


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16:20 Nov 7, 2009
French to English translations [PRO]
Science - Chemistry; Chem Sci/Eng
French term or phrase: dilatomètre à rodage
si la valeur absolue de la masse spécifique mesurée au moyen du dilatomètre à rodage est affectée d’une imprécision de l’ordre de xx %

This ocurs in a study of soaps
Thanks for any help
mohanv
India
Local time: 10:27
English translation:precision bore dilatometer
Explanation:
Rodage, when it has not been the "running in" of motor vehicles, is the "honing" of the cylinder bore in the factory (which has replaced the same action being carried out by gentle running of the engine on the road), so carries notions of "bore" and "precision". I hence believe it may be a "precision bore dilatometer" as referenced below, not necessarily of Pyrex. But who knows?

The steady hum of water baths with their rows of partially submerged DILATOMETERS has been a central feature of my entire career in the fats and oils industry. These old friends are silent now, as our company has converted entirely from SFI (Solid Fat Index) to SFC (Solid Fat Content) methodology. We are not alone. Several other companies have already done the same thing. The AOCS will soon relegate the SFI method to surplus status and replace it with SFC Method Cd 16b-93.
The history of the SFI method is intertwined with the development and growth of the hydrogenation process. At the turn of the 19th century, there was a serious shortage of solid fat for candles and SOAP. This led to intense research into ways to harden liquid oils, including plentiful supplies of cottonseed oil, which could be substituted for lard and tallow
[ ... ]
Their original DILATOMETRY method appeared in the 1944 edition of Oil and SOAP (now the Journal of the American Oil Chemists ' Society).
[ ... ]
In a move to a uniform methodology, the current SFI method Cd 10-57 was adopted by the AOCS in 1957. It has been revised twice. The method requires CALIBRATED PYREX DILATOMETERS constructed to exacting specifications, each with a bulb-type holder to hold the fat sample that is exposed to several temperatures.
http://findarticles.com/p/articles/mi_hb5601/is_200705/ai_n3...

the apparatus was a PRECISION BORE PYREX DILATOMETER TUBE. A carbon rod was placed in the bottom of the tube through a ground-glass joint and it in turn was ...
www.ems.psu.edu/~radovic/.../1955_59_245_Walker_JPhysChem.p...

THE FLOW PROPERTIES AND MESOMORPHIC BEHAVIOR OF ANHYDROUS SOAPS AT ELEVATED TEMPERATURES
PART I. SODIUM STEARATE ABOVE 200"'
[ ... ]
To determine the viscosity of sodium stearate in the range 285' to 336' a modified Poiseuille nlethocl was used with an apparatus constructecl from PYREX GLASS
http://article.pubs.nrc-cnrc.gc.ca/ppv/RPViewDoc?issn=1480-3...


--------------------------------------------------
Note added at 1 hr (2009-11-07 17:34:14 GMT)
--------------------------------------------------

Dilatometer
Dilatometer for the determination of the solid fat index (an empirical measure of the solid fat content) of shortenings, margarine oils, and other fats with a solid index of 50 or less at 10°C. Results are expressed as melting dilation in mL/kg of fat. Method is described in A.O.C.S. Method Cd. 10-57. Stem is made from PRECISION-BORE TUBING and overall accuracy of graduations is ±0.005 mL. Includes a 329105-0000 solid (closed) stopper and one 675300-0014 polyacetal clamp. Calibration certificate is supplied with 329325-0000
http://208.72.236.210/html/pg-329300.html

File Format: PDF/Adobe Acrobat - Quick View
using the Solid Fat Index (SFI) value, a dilatometric (volumetric) technique that takes about 5 hours. Food samples are loaded into a CALIBRATED DILATOMETER ...
las.perkinelmer.com/content/.../app_thermalsfivaluesfoodfats.pdf

Details on the measuring method here:
http://books.google.com/books?id=8S1QLUsDOwgC&pg=RA1-PA235&l...


--------------------------------------------------
Note added at 1 hr (2009-11-07 17:51:10 GMT)
--------------------------------------------------

Your subsequent Q. re étanchéité seems to suggest that rodage is used here in its "standard" meaning of "ground joint" in laboratory glassware. So you have a dilatometer (quite possibly a precision-bore Pyrex one!) with a ground joint.

--------------------------------------------------
Note added at 7 hrs (2009-11-07 23:42:02 GMT)
--------------------------------------------------

On second thoughts, and rereading the above, it's entirely possible that my original premise holds true. I refer above to :

the apparatus was a PRECISION BORE PYREX DILATOMETER TUBE. A carbon rod was placed in the bottom of the tube through a GROUND-GLASS JOINT and it in turn was ...
www.ems.psu.edu/~radovic/.../1955_59_245_Walker_JPhysChem.p...
in which I now note the "ground-glass joint" forming part of the dilatometer tube,

and (still above) in

Dilatometer
Dilatometer for the determination of the solid fat index (an empirical measure of the solid fat content) of shortenings, margarine oils, and other fats with a solid index of 50 or less at 10°C. Results are expressed as melting dilation in mL/kg of fat. Method is described in A.O.C.S. Method Cd. 10-57. Stem is made from PRECISION-BORE TUBING and overall accuracy of graduations is ±0.005 mL. Includes a 329105-0000 solid (closed) STOPPER and one 675300-0014 polyacetal clamp. Calibration certificate is supplied with 329325-0000
http://208.72.236.210/html/pg-329300.html

I find a "STOPPER" which might quite possibly be engaged in ground-glass joint.
Selected response from:

xxxBourth
Local time: 05:57
Grading comment
Thanks.
I have settled for "dilatometer with a ground joint"
4 KudoZ points were awarded for this answer



Summary of answers provided
4 +1precision bore dilatometerxxxBourth


  

Answers


1 hr   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1
precision bore dilatometer


Explanation:
Rodage, when it has not been the "running in" of motor vehicles, is the "honing" of the cylinder bore in the factory (which has replaced the same action being carried out by gentle running of the engine on the road), so carries notions of "bore" and "precision". I hence believe it may be a "precision bore dilatometer" as referenced below, not necessarily of Pyrex. But who knows?

The steady hum of water baths with their rows of partially submerged DILATOMETERS has been a central feature of my entire career in the fats and oils industry. These old friends are silent now, as our company has converted entirely from SFI (Solid Fat Index) to SFC (Solid Fat Content) methodology. We are not alone. Several other companies have already done the same thing. The AOCS will soon relegate the SFI method to surplus status and replace it with SFC Method Cd 16b-93.
The history of the SFI method is intertwined with the development and growth of the hydrogenation process. At the turn of the 19th century, there was a serious shortage of solid fat for candles and SOAP. This led to intense research into ways to harden liquid oils, including plentiful supplies of cottonseed oil, which could be substituted for lard and tallow
[ ... ]
Their original DILATOMETRY method appeared in the 1944 edition of Oil and SOAP (now the Journal of the American Oil Chemists ' Society).
[ ... ]
In a move to a uniform methodology, the current SFI method Cd 10-57 was adopted by the AOCS in 1957. It has been revised twice. The method requires CALIBRATED PYREX DILATOMETERS constructed to exacting specifications, each with a bulb-type holder to hold the fat sample that is exposed to several temperatures.
http://findarticles.com/p/articles/mi_hb5601/is_200705/ai_n3...

the apparatus was a PRECISION BORE PYREX DILATOMETER TUBE. A carbon rod was placed in the bottom of the tube through a ground-glass joint and it in turn was ...
www.ems.psu.edu/~radovic/.../1955_59_245_Walker_JPhysChem.p...

THE FLOW PROPERTIES AND MESOMORPHIC BEHAVIOR OF ANHYDROUS SOAPS AT ELEVATED TEMPERATURES
PART I. SODIUM STEARATE ABOVE 200"'
[ ... ]
To determine the viscosity of sodium stearate in the range 285' to 336' a modified Poiseuille nlethocl was used with an apparatus constructecl from PYREX GLASS
http://article.pubs.nrc-cnrc.gc.ca/ppv/RPViewDoc?issn=1480-3...


--------------------------------------------------
Note added at 1 hr (2009-11-07 17:34:14 GMT)
--------------------------------------------------

Dilatometer
Dilatometer for the determination of the solid fat index (an empirical measure of the solid fat content) of shortenings, margarine oils, and other fats with a solid index of 50 or less at 10°C. Results are expressed as melting dilation in mL/kg of fat. Method is described in A.O.C.S. Method Cd. 10-57. Stem is made from PRECISION-BORE TUBING and overall accuracy of graduations is ±0.005 mL. Includes a 329105-0000 solid (closed) stopper and one 675300-0014 polyacetal clamp. Calibration certificate is supplied with 329325-0000
http://208.72.236.210/html/pg-329300.html

File Format: PDF/Adobe Acrobat - Quick View
using the Solid Fat Index (SFI) value, a dilatometric (volumetric) technique that takes about 5 hours. Food samples are loaded into a CALIBRATED DILATOMETER ...
las.perkinelmer.com/content/.../app_thermalsfivaluesfoodfats.pdf

Details on the measuring method here:
http://books.google.com/books?id=8S1QLUsDOwgC&pg=RA1-PA235&l...


--------------------------------------------------
Note added at 1 hr (2009-11-07 17:51:10 GMT)
--------------------------------------------------

Your subsequent Q. re étanchéité seems to suggest that rodage is used here in its "standard" meaning of "ground joint" in laboratory glassware. So you have a dilatometer (quite possibly a precision-bore Pyrex one!) with a ground joint.

--------------------------------------------------
Note added at 7 hrs (2009-11-07 23:42:02 GMT)
--------------------------------------------------

On second thoughts, and rereading the above, it's entirely possible that my original premise holds true. I refer above to :

the apparatus was a PRECISION BORE PYREX DILATOMETER TUBE. A carbon rod was placed in the bottom of the tube through a GROUND-GLASS JOINT and it in turn was ...
www.ems.psu.edu/~radovic/.../1955_59_245_Walker_JPhysChem.p...
in which I now note the "ground-glass joint" forming part of the dilatometer tube,

and (still above) in

Dilatometer
Dilatometer for the determination of the solid fat index (an empirical measure of the solid fat content) of shortenings, margarine oils, and other fats with a solid index of 50 or less at 10°C. Results are expressed as melting dilation in mL/kg of fat. Method is described in A.O.C.S. Method Cd. 10-57. Stem is made from PRECISION-BORE TUBING and overall accuracy of graduations is ±0.005 mL. Includes a 329105-0000 solid (closed) STOPPER and one 675300-0014 polyacetal clamp. Calibration certificate is supplied with 329325-0000
http://208.72.236.210/html/pg-329300.html

I find a "STOPPER" which might quite possibly be engaged in ground-glass joint.

xxxBourth
Local time: 05:57
Native speaker of: Native in EnglishEnglish
PRO pts in category: 87
Grading comment
Thanks.
I have settled for "dilatometer with a ground joint"
Notes to answerer
Asker: thanks


Peer comments on this answer (and responses from the answerer)
agree  Bashiqa: Always one to give a little explanation, and it makes interesting reading.
5 hrs
  -> Thankee sorr, wouldn't do it if I didn't find it interesting (trivia, trivia!).
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