Estimating the acid concentration in spinning viscose complex yarn through a spinneret with a large number of holes

1984 ◽  
Vol 16 (2) ◽  
pp. 74-77
Author(s):  
G. K. Kudryashov ◽  
G. A. Danilin ◽  
A. T. Serkov
Keyword(s):  
Acid Concentration ◽  
Complex Yarn

The Effect of Stress and Warfarin on the Adrenal Gland in Relation to Spontaneous Hemorrhage, as Judged by Measurement of Adrenal Ascorbic Acid and Serum Corticosterone

1971 ◽  
Vol 26 (02) ◽  
pp. 275-288 ◽  
Author(s):  
S Chattopadhyay ◽  
D. D Johnson ◽  
G. J Millar ◽  
L. B Jaques
Keyword(s):  
Ascorbic Acid ◽  
Acid Concentration ◽  
Ascorbic Acid Concentration ◽  
Corticosterone Concentration ◽  
Serum Corticosterone ◽  
Spontaneous Hemorrhage ◽  
Combined Action ◽  
Series Of Experiments ◽  
Pituitary Adrenal Axis

SummaryRats were subjected to the following procedures: No treatment, Stressor (10% NaCl i.p.), Warfarin for 7 days, Stressor followed by Warfarin; and groups were sacrificed at intervals for assessment of spontaneous hemorrhage and of adrenal ascorbic acid concentration. There was no hemorrhage in the no treatment and stressor groups; some hemorrhage in the warfarin group; profound hemorrhage with Warfarin + Stressor. The adrenal ascorbic acid concentration was found to be lower, 8 h and again 5 days after stress, and remained lower in the warfarin + stress animals. Warfarin had no effect on adrenal ascorbic acid level.In another series of experiments in which the stress consisted of an electric current to the cage floor for 6 sec over 15 min, rats were sacrificed daily for determination of serum corticosterone concentration and occurrence of spontaneous hemorrhage. There was a statistically significant increase of serum corticosterone concentration with stress, warfarin and combined warfarin and stress treatments (P< 0.001 for all three variables). There was a significant correlation (r = 0.96 and 0.89, P< 0.01) for serum corticosterone concentration with hemorrhage score and incidence of hemorrhage in stressed rats receiving warfarin, but not in those receiving only warfarin. The results indicate an activation, rather than an exhaustion, of the pituitary-adrenal axis during the combined action of anticoagulant and stress, which results in the development of spontaneous hemorrhage.

ALDH2 Genetic Polymorphism and Urinary Hippuric Acid Concentration in Toluene Exposed Workers

1997 ◽  
Vol 9 (2) ◽  
pp. 332
Author(s):  
Oh Choon Kwon ◽  
Ree Joo ◽  
Jung Jeung Lee ◽  
Chang Yoon Kim ◽  
Jong Hak Chung ◽  
...  
Keyword(s):  
Genetic Polymorphism ◽  
Acid Concentration ◽  
Hippuric Acid ◽  
Exposed Workers

PREDICTIVE SIMULATION AND OPTIMIZATION ORIENTED MODELING FOR THE EXTRACTION OF METAL IONS FROM SOLUTIONS INTO A NOVEL BIS-SCHIFF BASE

2019 ◽  
pp. 1-8
Author(s):  
F. S. Nworie ◽  
S. O. Ngele ◽  
J. C. Onah
Keyword(s):  
Metal Ions ◽  
Metal Concentration ◽  
Acid Concentration ◽  
Aqueous Media ◽  
Industrial Effluents ◽  
Ligand Concentration ◽  
Simulation And Optimization ◽  
Chemometric Technique ◽  
Model Equations ◽  
Level Of Significance

Metal ions present in waste samples, industrial effluents, acid mines and other aqueous media constitute a serious challenge in different human activities. Solvent extraction a technique for preconcentration, separation and identification of trace amount of metal ions coupled with multivariate chemometric technique was used for the determination of Fe(II) and Cr(III) from solutions in the presence of bis(salicylidene)ethylenediamine (SALEN). The influence of main extraction variables affecting the extraction efficiency was simultaneously studied and regression model equations illustrating the relationship between variables predicted. The extraction parameters (time of extraction, acid concentration, ligand concentration, temperature and metal concentration) were optimized using experimental designs with the contributions of the various parameters to extraction of the metal ions bound to the complexone evaluated using SPSS19.0 software. The statistically determined simulated models for the parameters were R2 = 0.946, 0.727, 0.793, 0.53, 0.53, 1.000 and F- values of 70.400, 13. 285, 15.348, 4.646 and 2.569×105 respectively for time of extraction, acid concentration, ligand concentration, temperature and metal concentration for Cr (III). For Fe (II), R2 = 0.243, 0.371, 0.519, 0.446, 1.000 and F-values of 0.964, 2.953, 4.310, 3.216 and 2.516×105 for time of extraction, acid concentration, ligand concentration, temperature and metal concentration respectively. The level of significance of the models as predicted was both lower than 5% making it feasible, efficient, reproducible and accurate. This means that metal ions at the conditions stated could be removed from waste samples, industrial effluents, acid mines and other aqueous media with extension in industrial scale application.

Survival and recovery of perennial forage grasses under prolonged Mediterranean drought: II. Water status, solute accumulation, abscisic acid concentration and accumulation of dehydrin transcripts in bases of immature leaves

1998 ◽  
Vol 140 (3) ◽  
pp. 451-460 ◽  
Author(s):  
FLORENCE VOLAIRE ◽  
HENRY THOMAS ◽  
NADIA BERTAGNE ◽  
EMMANUELLE BOURGEOIS ◽  
MARIE-FRANCOISE GAUTIER ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Acid Concentration ◽  
Water Status ◽  
Forage Grasses ◽  
Solute Accumulation

Change of rH2 depending on iron oxidation byThiobacillus ferrooxidans and on mineral acid concentration

1977 ◽  
Vol 17 (3) ◽  
pp. 253-254
Author(s):  
D. Bracilović ◽  
F. Barbič ◽  
J. Živković
Keyword(s):  
Acid Concentration ◽  
Iron Oxidation ◽  
Mineral Acid

Self-setting β-tricalcium phosphate granular cement at physiological body condition: effect of citric acid concentration as an inhibitor

2021 ◽  
Author(s):  
Lim Jun Wei ◽  
Khairul Anuar Shariff ◽  
Syed Abdul Momin ◽  
Mohamad Hafizi Abu Bakar ◽  
Arief Cahyanto
Keyword(s):  
Citric Acid ◽  
Acid Concentration ◽  
Body Condition ◽  
Tricalcium Phosphate ◽  
Citric Acid Concentration ◽  
Condition Effect
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