scholarly journals CONSTANT TEMPERATURE for kinematic viscosity measurements

1945 ◽  
Vol 23 (10) ◽  
pp. 917
Keyword(s):  
Constant Temperature ◽  
Kinematic Viscosity ◽  
Viscosity Measurements

Relaxation Processes Features of Glass-Forming Melts on the Basis of Copper

2015 ◽  
Vol 660 ◽  
pp. 108-112
Author(s):  
Viktor Konashkov ◽  
Vladimir Tsepelev ◽  
Arkadi Povodator
Keyword(s):  
Relaxation Process ◽  
Constant Temperature ◽  
Liquid State ◽  
Kinematic Viscosity ◽  
Relaxation Processes ◽  
Temperature Instability ◽  
State Data ◽  
Glass Forming ◽  
Heating And Cooling ◽  
Two Samples

Two samples of industrial alloys on the basis of copper are experimentally studied. These alloys are used for production of amorphous solders. The main studied property is kinematic viscosity of metal melt in a liquid state. Data of viscosity dependences from temperature when heating and the subsequent cooling are obtained. Besides, viscosity dependences at constant temperatures from time are received. On viscosity dependences from temperature, for the same samples, abnormal sites and a divergence of curves of heating and cooling are found. On viscosity dependences from time, at a constant temperature, instability is found. The conclusion is drawn that the revealed features are connected with complexity of relaxation process of the studied fusions.

scholarly journals The Viscous Properties of Diols. I. The Homologous Series of 1,2- and 1,n-Alkanediols

2003 ◽  
Vol 58 (5-6) ◽  
pp. 317-320 ◽  
Author(s):  
Grzegorz Czechowski ◽  
Jan Jadżyn
Keyword(s):  
Activation Energy ◽  
Constant Temperature ◽  
Homologous Series ◽  
Viscosity Measurements ◽  
Alkane Chain

The paper presents the results of viscosity measurements performed on 1,2-alkanediols, H(CH2)n−2CH(OH)CH2(OH), n = 2 : 12, and 1,n-alkanediols, HO(CH2)nOH, n = 2 : 10, as functions of the temperature. It is shown that the viscosity (at constant temperature) and activation energy of the viscosity show a quite different dependence on the length of the alkane chain in 1,2- and 1,n-alkanediols molecules.

Rapid determination of diesel/biodiesel blend ratio using refractive index, density, and kinematic viscosity measurements

2021 ◽  
Author(s):  
Siti Norhafiza Mohd Khazaai ◽  
Prakash Bhuyar ◽  
Mohd Hasbi Ab. Rahim ◽  
Muhammad Hasnol Fazirin Mohd Alwi ◽  
Sih Yiting ◽  
...  
Keyword(s):  
Refractive Index ◽  
Kinematic Viscosity ◽  
Rapid Determination ◽  
Blend Ratio ◽  
Viscosity Measurements ◽  
Biodiesel Blend

Dynamic and kinematic viscosity measurements with a resonating microtube

2009 ◽  
Vol 149 (1) ◽  
pp. 38-41 ◽  
Author(s):  
D. Sparks ◽  
R. Smith ◽  
V. Cruz ◽  
N. Tran ◽  
A. Chimbayo ◽  
...  
Keyword(s):  
Kinematic Viscosity ◽  
Viscosity Measurements ◽  
Dynamic And Kinematic Viscosity

Gravimetric capillary method for kinematic viscosity measurements

1992 ◽  
Vol 63 (9) ◽  
pp. 4196-4199 ◽  
Author(s):  
Franz Rosenberger ◽  
J. Iwan ◽  
D. Alexander ◽  
Wei‐qing Jin
Keyword(s):  
Kinematic Viscosity ◽  
Viscosity Measurements ◽  
Capillary Method

Improvement in the Fock test for determining the reactivity of dissolving pulp

TAPPI Journal ◽  
2013 ◽  
Vol 12 (11) ◽  
pp. 21-26 ◽  
Author(s):  
CHAO TIAN ◽  
LINQIANG ZHENG ◽  
QINGXIAN MIAO ◽  
CHRIS NASH ◽  
CHUNYU CAO ◽  
...  
Keyword(s):  
Moisture Content ◽  
Sodium Hydroxide ◽  
Constant Temperature ◽  
Carbon Disulfide ◽  
Testing Procedure ◽  
Dissolving Pulp ◽  
Water Bath ◽  
Testing Conditions ◽  
Pulp Sample ◽  
Fock Reactivity

The Fock test is widely used for assessing the reactivity of dissolving pulp. The objective of this study was to modify the method to improve the repeatability of the test. Various parameters that affect the repeatability of the Fock test were investigated. The results showed that Fock reactivity is dependent on testing conditions affecting the xanthation between cellulose and carbon disulfide, such as the moisture content of the pulp sample, sodium hydroxide (NaOH) concentration, xanthation temperature, carbon disulfide dosage, and xanthation time. The repeatability of the test was significantly improved using the following modified testing procedure: air dried sample in the constant temperature/humidity room, xanthation temperature of 66°F (19°C) in a water bath, xanthation time of 3 h, NaOH concentration of 9% (w/w), and 1.3 mL carbon disulfide.

ACTION OF ENZYME DIGESTED PITUITARY GLANDS OF THE SKIPPER-FROG ON THE OVULATION OF THE SAME

1960 ◽  
Vol XXXIII (II) ◽  
pp. 255-260 ◽  
Author(s):  
L. S. Ramaswami ◽  
A. B. Lakshman
Keyword(s):  
Pituitary Gland ◽  
Constant Temperature ◽  
Constant Temperature Bath ◽  
Predominant Role ◽  
Lower Vertebrates ◽  
Pituitary Glands ◽  
Stimulating Factor

ABSTRACT By using enzymes, the gonadotrophic factors in the skipper-frog pituitary glands have been selectively inactivated or destroyed. By incubating a known number of pituitary gland homogenate with ptyalin in a constant temperature bath for 5–6 h the follicle-stimulating factor is inactivated; with trypsin or pepsin, the luteinizing factor is inactivated. Bioassay on gravid skipper-frogs indicate that the ptyalin digested homogenate brings about profuse spawning while the trypsin or pepsin digested homogenates do not. When a combination of ptyalin digested and trypsin digested homogenates is injected into fresh gravid skipper-frogs, poor spawning is brought about. These experiments show that the luteinizing factor alone brings about more profuse spawning than when it is combined with the follicle-stimulating factor. It is likely, therefore, that in the lower vertebrates the luteinizing factor of the pituitary gland plays a more predominant role. The exact proportions in which the different dosages for the control and test animals are administered are also tabulated.

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