THE INFLUENCE OF TEMPERATURE ON THYROID HISTOLOGY AND RADIOIODINE METABOLISM OF YEARLING STEELHEAD TROUT, SALMO GAIRDNERI

1964 ◽  
Vol 42 (5) ◽  
pp. 829-841 ◽  
Author(s):  
J. G. Eales
Keyword(s):  
High Temperatures ◽  
The Other ◽  
Salmo Gairdneri ◽  
Staining Reaction ◽  
Steelhead Trout ◽  
Thyroid Activity ◽  
Influence Of Temperature ◽  
Thyroid Uptake ◽  
Influence Of Temperature On ◽  
Thyroid Histology

The thyroid activity of yearling steelhead, as measured by radioiodine methods (CR and T/S), increased with temperature from 6 to 18 °C. The thyroid uptake of I131 peaked at 12 °C. However, this method was found unreliable, since plasma I131 clearance, upon which it depends, also increased with temperature.The staining reaction of the colloid (Azan stain) indicated greater thyroid activity at high temperatures. On the other hand, measurements of thyroid mean epithelial height implied greater activity at low temperatures.A hypothesis resolving; anomalies between various criteria of thyroid activity, based on a TSH-independent influence of temperature on the poikilotherm thyroid, is presented.

scholarly journals VI. The specific heats of metals and the relation of specific heat to atomic weight.—Part III

1904 ◽  
Vol 203 (359-371) ◽  
pp. 139-149 ◽  
Keyword(s):  
Specific Heat ◽  
Atomic Weight ◽  
The Other ◽  
Influence Of Temperature ◽  
Specific Heats ◽  
Weight Part ◽  
Chemical Combination ◽  
Influence Of Temperature On ◽  
The Mean ◽  
The One

The law of Neumann assumes that when an atom enters into chemical combination it retains the same capacity for heat as when in the uncombined or elemental state. This generalisation is, however, based on the values observed for the mean specific heats of elements and their compounds between 0° and 100° C. Attention was directed in Part II. of this investigation to the great differences found in the influence of temperature on the specific heats of various metals, such as aluminium on the one hand, and silver or platinum on the other. The experiments now about to be described were undertaken with the object of ascertaining to what extent these differences persist in the compounds of such elements.

scholarly journals THE INFLUENCE OF TEMPERATURE ON THE ACTION OF STRYCHNIN IN FROGS

1913 ◽  
Vol 18 (3) ◽  
pp. 300-309 ◽  
Author(s):  
Thomas Stotesbury Githens
Keyword(s):  
Low Temperature ◽  
High Temperatures ◽  
Low Temperatures ◽  
Room Temperature ◽  
Drug Action ◽  
The State ◽  
Great Caution ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

In order to establish the influence of temperature upon the effect of varying doses of strychnin injected into frogs, the animals must be kept under observation for several days and at various definite degrees of temperature. Statements that the animal was kept "cold," "at room temperature," or "warm" are insufficient. With a certain dose tetanus may result constantly at 30° C. yet never appear at 21° C., and either of these temperatures might be described as warm, when compared to a room temperature of 15° C. Furthermore an animal may apparently fail to respond in the cold to an injection of certain doses of strychnin and yet be found in tetanic convulsions the next day. That an animal may have late, long lasting, or strong tetanus while kept at such a low temperature as 5° C. after an injection of a dose of strychnin smaller than 0.01 of a milligram per frog emphasizes the fact that great caution must be exercised in formulating laws as to the influence of temperature on drug action. The main results of this investigation may be summarized as follows: Doses of strychnin amounting to 0.0006 of a milligram per gram of frog will cause tetanus at all temperatures between 5° C. and 30° C., although at low temperatures the tetanus may appear late. A dose of 0.0003 of a milligram per gram of frog will frequently produce tetanus at 5° C. as well as at 30° or 27° C., but may nevertheless fail to produce any reaction at such an intermediary temperature as 21° C. Smaller doses, 0.0002 of a milligram per gram, will cause tetanus in the cold but not at high temperatures. It may be stated in general that in frogs kept at low temperatures the tetanic state sets in later, continues longer, and each tetanic attack is of longer duration, while in the interval between the attacks the state of tonus is higher and the animals are more irritable than when they are kept at higher temperatures.

scholarly journals Pengaruh Ketinggian Tempat dan Curah Hujan Pada Penyakit Diare (Studi Kasus: Kabupaten Bogor)

Agromet ◽  
2018 ◽  
Vol 28 (1) ◽  
pp. 33
Author(s):  
Muhammad Syafei ◽  
Rini Hidayati
Keyword(s):  
Sea Level ◽  
Negative Influence ◽  
Positive Influence ◽  
The Other ◽  
Threshold Values ◽  
Climate Classification ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Very High

<em>This study aimed to determine the effect of altitude and rainfall on the incidence of disease ( IR ) diarrhea, and to obtain threshold values ​​of rainfall that often cause diarrhea. Determination category of normal rate of diarrhea IR is based on diarrhea IR by DINKES Bogor in the amount of 20-25/1000 population per year, while the determination of precipitation category is based on consideration of Oldeman climate classification. The results showed that there were two districts with very high levels of vulnerability i.e.  Cisarua and Cijeruk, while the other regions only at a moderate level. The negative influence of altitude (or positive influence of temperature) on the IR will be evident if the analysis is separated between in the highlands (&gt; 600 asl) and the lowlands (&lt; 600 asl). This influence is significant, especially at altitudes above 600 meters above sea level. The correlation of the precipitation is significant negative linear to the incidence of diarrhea in the district Cisarua, Cibinong, Jonggol, and Jasinga. In districts Cibinong, Jonggol, and Jasinga, precipitation should be anticipated in the range of 100-200 mm/month, where moderate IR often occurs, while in the district Cisarua, is in the range of precipitation 300-400 mm/month, where high IR often occurs.</em>

INFLUENCE OF TEMPERATURE ON GROWTH OF FROKER OATS FOR FORAGE.: 1. DRY MATTER YIELDS AND GROWTH RATES

1974 ◽  
Vol 54 (4) ◽  
pp. 725-730 ◽  
Author(s):  
DALE SMITH
Keyword(s):  
Growth Rates ◽  
Avena Sativa ◽  
Dry Matter ◽  
The Other ◽  
Night Temperature ◽  
Influence Of Temperature ◽  
Temperature Regimes ◽  
Influence Of Temperature On

Oats (Avena sativa L. cv. Froker) were grown to initial panicle emergence in three day/night temperature regimes; H (32/26 C), W (27/21 C), and C (21/15 C). At initial panicle emergence, some plants were transferred to the other regimes until complete panicle emergence. Plants grown continuously in the W regime reached initial panicle emergence in 34 days and complete panicle emergence in 42 days. These stages were reached about a week later in C regime and about 2 wk later in H regime. As compared with plants retained at one temperature to complete panicle emergence, moving plants at initial panicle emergence from H to W or C, or from C to H or W, decreased time to complete panicle emergence by 4 to 6 days. However, complete panicle emergence was delayed 4 to 5 days when plants were moved from W to C or H. Dry matter yields and growth rates (mg/pot/day) of plants grown continuously in the same regime to initial and to complete panicle emergence were highest, and similar, in the W and C regimes, but were significantly lower in the H. As compared with plants retained at one temperature to complete panicle emergence, changing at initial panicle emergence from H to W or C increased dry matter yields and growth rates at complete panicle emergence, whereas changing from W or C to H decreased these parameters. Yields and growth were changed very little by change from W to C or from C to W.

scholarly journals ACOUSTIC EMISSION UNDER TEMPERATURE TESTS OF MATERIALS

Aviation ◽  
2005 ◽  
Vol 9 (4) ◽  
pp. 24-28 ◽  
Author(s):  
Vitalii Babak ◽  
Sergay Filonenko ◽  
Viktor Kalita
Keyword(s):  
Plastic Deformation ◽  
Acoustic Emission ◽  
High Temperatures ◽  
Low Temperatures ◽  
Theoretical Research ◽  
Influence Of Temperature ◽  
Intermediate Area ◽  
Influence Of Temperature On

The theoretical research of the influence of temperature on the parameters of the alteration of acoustic emission signals from plastic deformation is considered. It is shown that increasing temperatures cause an increase in the amplitude of acoustic emission signals in an area of low temperatures and a decrease in an area of high temperatures. At the same time, there is an intermediate area of temperatures in which the amplitude of acoustic emission signals remains constant when temperature is increased. As shown in the article, this fact is connected with the alteration of the process of plastic deformation.

Influence of temperature on the reproduction of Damalinia equi (Denny)

1963 ◽  
Vol 11 (2) ◽  
pp. 183 ◽  
Author(s):  
MD Murray
Keyword(s):  
Skin Temperature ◽  
High Temperatures ◽  
Atmospheric Temperature ◽  
Early Spring ◽  
The Body ◽  
The Sun ◽  
Hair Coat ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

No development of the egg within the female Damalinia equi (Denny) occurred at 16�C. Most eggs were laid at 36�C at R.H.'s of 75% or less, but after an exposure to 44.5�C for only 1 hr females did not lay eggs. Morphogenesis proceeded to an advanced state from 27-39�C, but its completion and the subsequent hatching of the embryo only took place from 31-39�C provided the R.H. was less than 90%. A R.H. of 90% prevented hatching of the eggs. Exposure of eggs to 49�C for 2 hr was lethal. The skin temperature of the horse is influenced considerably by atmospheric temperature. The abundance of D. equi on the bodies of horses in early spring is probably due to the temperatures near the skin of the body being continuously favourable for reproduction of D. equi during the winter. Exposure to the sun can cause the temperatures within the hair coat on the upper aspects of the body to become higher than 44.5�C for more than an hour and thus can retard reproduction. The accumulative effect of repeated high temperatures could prevent an increase in the numbers of D. equi during the summer.

FACTORS INFLUENCING SEASONAL CHANGES IN THYROID ACTIVITY IN JUVENILE STEELHEAD TROUT, SALMO GAIRDNERI

1965 ◽  
Vol 43 (5) ◽  
pp. 719-729 ◽  
Author(s):  
J. G. Eales
Keyword(s):  
Body Weight ◽  
Seasonal Changes ◽  
Late Summer ◽  
Salmo Gairdneri ◽  
Thyroid Cell ◽  
Steelhead Trout ◽  
Thyroid Activity ◽  
Cell Height ◽  
Factors Influencing ◽  
Tall Cell

Seasonal changes in thyroid cell height and radioiodide indices of thyroid activity (CR and T/S) were measured in yearling and 2-year-old steelhead trout held in freshwater. Cell height was high in yearlings in mid-June and in 2-year-olds in late April and May at parr–smolt transformation; in both it was low in late summer and moderately high in winter. CR and T/S were high both at parr–smolt transformation and in late summer, but were low in winter. Only at parr–smolt transformation did cell height and radioiodide indices agree.Two-year-old potential smolts were held from January to May under four controlled temperature and photoperiod regimes. These experiments revealed that at parr–smolt transformation, both rising temperature and lengthening photoperiod induced the characteristically high CR and T/S values, but that the tall cell height depended on the lengthening photoperiod. Cell height and T/S were measured in yearlings (non-migrants) subjected to similar regimes at the same season. T/S was uninfluenced by photoperiod but responded to rising temperature. Cell height responses were more complex and indicated involvement of other variables.In September, small yearlings possessed significantly higher T/S and CR values than did large yearlings. A relationship between thyroid function and body weight could explain seasonal changes not attributable to temperature or photoperiod.

Weiss. Influence des variations de temperature sur les periodes latentes du muscle, du nerf et de la moelle. Compt. rend, hebdom. des seances de la Societe de Biologie T. III No. 3 p. 51 1900. About the influence of temperature on the latent period of irritation of muscle, nerve and spinal cord

1901 ◽  
Vol IX (2) ◽  
pp. 204-205
Author(s):  
D. Polumordvinov
Keyword(s):  
Spinal Cord ◽  
Latent Period ◽  
High Temperatures ◽  
Muscle Tissue ◽  
Low Temperatures ◽  
Chemical Processes ◽  
Influence Of Temperature ◽  
Influence Of Temperature On ◽  
Muscle Nerve ◽  
Living Tissues

The intensity of the chemical processes occurring in living tissues undergoes significant changes, the temperature of these tissues changes; on muscle tissue, this law can be demonstrated with greater clarity; It is known that when the temperature rises or falls, the muscle curve shrinks sharply, and the latent period of irritation lengthens for low temperatures and shortens for high temperatures. The duration of the latent period is thus associated with the rapidity of the appearance of chemical changes in the muscles and can serve, to a certain extent, as yardstick.

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