Food Consumption of House Mice at Low Temperatures

1955 ◽  
Vol 36 (3) ◽  
pp. 460-462 ◽  
Author(s):  
R. L. Strecker
Keyword(s):  
Food Consumption ◽  
Low Temperatures ◽  
House Mice

The Effect of Carbon Disulfide on Food Consumption by House Mice

1988 ◽  
Vol 52 (3) ◽  
pp. 502 ◽  
Author(s):  
N. Jay Bean ◽  
Bennett G. Galef ◽  
J. Russell Mason
Keyword(s):  
Food Consumption ◽  
Carbon Disulfide ◽  
House Mice

METABOLIC ADJUSTMENTS TO LOW TEMPERATURES IN NEW ZEALAND WHITE RABBITS

1967 ◽  
Vol 45 (3) ◽  
pp. 451-461 ◽  
Author(s):  
O. Heroux
Keyword(s):  
Body Weight ◽  
Oxygen Consumption ◽  
New Zealand ◽  
Food Consumption ◽  
Low Temperatures ◽  
Cold Resistance ◽  
Complete Disappearance ◽  
Maximum Increase ◽  
New Zealand White Rabbits ◽  
Resting Metabolism

Characteristics of cold acclimation in shaved New Zealand white adult rabbits kept individually at 6 °C for 3–5 weeks were (i) a 40% increase in food consumption, (ii) maintenance of body weight, (iii) a 45% increase in resting metabolism measured at 28 °C, (iv) an almost complete disappearance of shivering, (v) increased cold resistance, (vi) failure to cut off increased heat production when abruptly returned to 28 °C, and (vii) a maximum increase of 41% in oxygen consumption after noradrenaline infusion at 28 °C of doses varying between 1.18 and 9.44 μg/kg per min. Rats acclimated to 6 °C showed a maximum increase of 113% in their oxygen consumption when infused with similar doses of noradrenaline varying between 1.34 and 10.72 μg/kg per min. The conclusion is reached that in rabbits which usually rely on thick fur for protection against cold, the primary metabolic adjustments in these animals when they are shaved are a rise in basal metabolism and an increase of the same order in noradrenaline sensitivity.

Food preferences of house mice (Mus domesticus) and their implications for control strategies

1998 ◽  
Vol 25 (6) ◽  
pp. 595 ◽  
Author(s):  
G. E. Robards ◽  
Glen Saunders
Keyword(s):  
Food Consumption ◽  
House Mouse ◽  
Fish Meal ◽  
Control Strategies ◽  
Food Preferences ◽  
House Mice ◽  
Mus Domesticus ◽  
Management Implications ◽  
Preferred Foods ◽  
Flavour Enhancers

A series of pen evaluations of food preferences of the house mouse (Mus domesticus) were conducted to determine whether the acceptability of poison baits could be enhanced with variations to grain type and the incorporation of flavour enhancers. Results showed that soft wheat, canary seed and rice were the most preferred foods, particularly when fish meal was added. Apart from some differences due to the addition of fishmeal, none of the additives, flavours or dyes had a statistically significant effect on food consumption. Management implications of the results are discussed.

scholarly journals Sodium metabolism during acclimation to water restriction by wild mice, Mus musculus

1981 ◽  
Vol 240 (5) ◽  
pp. R319-R326 ◽  
Author(s):  
T. M. McKenna ◽  
H. Haines
Keyword(s):  
Food Consumption ◽  
House Mice ◽  
Water Restriction ◽  
Wild Mice ◽  
Potassium Balance ◽  
Ad Libitum ◽  
Negative Balance ◽  
Sodium Metabolism ◽  
Sodium And Potassium ◽  
Acid Labile

Changes in sodium and potassium balance and urinary aldosterone excretion (free plus “acid labile”) were surveyed in house mice acclimating initially to 1/2 the ad libitum water ration and later to 1/4 of ad libitum. Each water restriction caused negative sodium and potassium balance, followed by conservation of both ions. At the first water restriction, negative balance was produced by natriuresis and kaliuresis, at successive water restriction, a negative balance was due to a decrease in food consumption. Aldosterone excretion doubled at the 1/2 ad libitum restriction, and then generally remained at control levels thereafter. Fractional intestinal absorption of both ions showed a persistent increase after the 3rd day of water restriction. The Na:K ratio in urine and feces declined as mice responded to each water restriction and returned to control levels in acclimated animals.

Interpretation of irradiation-induced changes in electron diffractograms and images of extinction contours at low temperatures

1984 ◽  
Vol 42 ◽  
pp. 268-269
Author(s):  
E. Knapek ◽  
H. Formanek ◽  
G. Lefranc ◽  
I. Dietrich
Keyword(s):  
Low Temperatures ◽  
Carbon Films ◽  
Organic Crystals ◽  
Wide Spread ◽  
Lens System ◽  
Preparation Conditions ◽  
Thin Carbon ◽  
Electron Diffractograms ◽  
Diffraction Patterns ◽  
Induced Changes

A few years ago results on cryoprotection of L-valine were reported, where the values of the critical fluence De i.e, the electron exposure which decreases the intensity of the diffraction reflections by a factor e, amounted to the order of 2000 + 1000 e/nm2. In the meantime a discrepancy arose, since several groups published De values between 100 e/nm2 and 1200 e/nm2 /1 - 4/. This disagreement and particularly the wide spread of the results induced us to investigate more thoroughly the behaviour of organic crystals at very low temperatures during electron irradiation.For this purpose large L-valine crystals with homogenuous thickness were deposited on holey carbon films, thin carbon films or Au-coated holey carbon films. These specimens were cooled down to nearly liquid helium temperature in an electron microscope with a superconducting lens system and irradiated with 200 keU-electrons. The progress of radiation damage under different preparation conditions has been observed with series of electron diffraction patterns and direct images of extinction contours.

Radiation Damage of Support Films

1981 ◽  
Vol 39 ◽  
pp. 28-29
Author(s):  
H.A. Cohen ◽  
W. Chiu
Keyword(s):  
Transfer Function ◽  
Low Temperatures ◽  
Carbon Support ◽  
Contrast Transfer Function ◽  
Electron Dose ◽  
Imaging Parameters ◽  
Negative Stain ◽  
Phase Corrections ◽  
Two Parameters ◽  
Medium Dose

The goal of imaging the finest detail possible in biological specimens leads to contradictory requirements for the choice of an electron dose. The dose should be as low as possible to minimize object damage, yet as high as possible to optimize image statistics. For specimens that are protected by low temperatures or for which the low resolution associated with negative stain is acceptable, the first condition may be partially relaxed, allowing the use of (for example) 6 to 10 e/Å2. However, this medium dose is marginal for obtaining the contrast transfer function (CTF) of the microscope, which is necessary to allow phase corrections to the image. We have explored two parameters that affect the CTF under medium dose conditions.Figure 1 displays the CTF for carbon (C, row 1) and triafol plus carbon (T+C, row 2). For any column, the images to which the CTF correspond were from a carbon covered hole (C) and the adjacent triafol plus carbon support film (T+C), both recorded on the same micrograph; therefore the imaging parameters of defocus, illumination angle, and electron statistics were identical.

In situ Tensile Experiments at Low Temperatures on Niobium Single Crystals by H.V.E.M.

1975 ◽  
Vol 33 ◽  
pp. 58-59
Author(s):  
F. H. Louchet ◽  
L. P. Kubin
Keyword(s):  
Electron Microscope ◽  
Transition Temperature ◽  
Low Temperature ◽  
Slip System ◽  
Low Temperatures ◽  
Tensile Axis ◽  
Image Intensifier ◽  
Screw Dislocations ◽  
Source Operation

Experiments have been carried out on the 3 MeV electron microscope in Toulouse. The low temperature straining holder has been previously described Images given by an image intensifier are recorded on magnetic tape.The microtensile niobium samples are cut in a plane with the two operative slip directions [111] and lying in the foil plane. The tensile axis is near [011].Our results concern:- The transition temperature of niobium near 220 K: at this temperature and below an increasing difference appears between the mobilities of the screw and edge portions of dislocations loops. Source operation and interactions between screw dislocations of different slip system have been recorded.

Ultrastructure of the soil fungus, Geomyces pannorus

1984 ◽  
Vol 42 ◽  
pp. 738-739
Author(s):  
J. A. Traquair ◽  
E. G. Kokko
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fine Structure ◽  
Low Temperatures ◽  
Soil Fungus ◽  
Organic Soils ◽  
Anatomical Studies ◽  
Transmission Electron ◽  
Electron Microscopical ◽  
Scanning Electron

With the advent of improved dehydration techniques, scanning electron microscopy has become routine in anatomical studies of fungi. Fine structure of hyphae and spore surfaces has been illustrated for many hyphomycetes, and yet, the ultrastructure of the ubiquitous soil fungus, Geomyces pannorus (Link) Sigler & Carmichael has been neglected. This presentation shows that scanning and transmission electron microscopical data must be correlated in resolving septal structure and conidial release in G. pannorus.Although it is reported to be cellulolytic but not keratinolytic, G. pannorus is found on human skin, animals, birds, mushrooms, dung, roots, and frozen meat in addition to various organic soils. In fact, it readily adapts to growth at low temperatures.

Structure and Orientation of As Precipitates in LT-MBE Grown GaAs

1991 ◽  
Vol 49 ◽  
pp. 900-901 ◽  
Author(s):  
Alain Claverie ◽  
Zuzanna Liliental-Weber
Keyword(s):  
Transport Properties ◽  
Layer Thickness ◽  
Growth Temperature ◽  
Low Temperatures ◽  
Lattice Parameter ◽  
Crystalline Quality ◽  
Insulating Properties ◽  
Lt Gaas

GaAs layers grown by MBE at low temperatures (in the 200°C range, LT-GaAs) have been reported to have very interesting electronic and transport properties. Previous studies have shown that, before annealing, the crystalline quality of the layers is related to the growth temperature. Lowering the temperature or increasing the layer thickness generally results in some columnar polycrystalline growth. For the best “temperature-thickness” combinations, the layers may be very As rich (up to 1.25%) resulting in an up to 0.15% increase of the lattice parameter, consistent with the excess As. Only after annealing are the technologically important semi-insulating properties of these layers observed. When annealed in As atmosphere at about 600°C a decrease of the lattice parameter to the substrate value is observed. TEM studies show formation of precipitates which are supposed to be As related since the average As concentration remains almost unchanged upon annealing.

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