Structure of Membranes and Role of Lipids Therein1 1Contribution No. 358, Animal Research Institute

1971 ◽  
pp. 161-248 ◽  
Author(s):  
FRANTZ A. VANDENHEUVEL
Keyword(s):  
Animal Research ◽  
Animal Research Institute ◽  
Research Institute

APPEARANCE OF OESTRONE SULPHATE IN THE ALLANTOIC FLUID OF THE COW

1978 ◽  
Vol 79 (2) ◽  
pp. 243-244 ◽  
Author(s):  
H. A. ROBERTSON ◽  
G. J. KING ◽  
J. A. CARNEGIE
Keyword(s):  
Allantoic Fluid ◽  
Animal Research ◽  
Reproductive Physiology ◽  
Poultry Science ◽  
Peripheral Plasma ◽  
Early Stages ◽  
Oestrone Sulphate ◽  
Pregnant Ewe ◽  
Animal Research Institute ◽  
Research Institute

Reproductive Physiology Program, Animal Research Institute, Ottawa, Ontario, Canada, K1A 0C6 and * Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada, N1G 2W1 (Received 15 May 1978) The ability of the conceptus to synthesize oestrogens during the early stages of pregnancy has recently been receiving increasing attention. Among the domesticated species, the day 12 blastocyst of the pig has been shown to be capable of synthesizing oestrogens (Perry, Heap & Amoroso, 1973; Gadsby, Burton, Heap & Perry, 1976) and oestrone sulphate, synthesized as a product of conception, has been shown to be present in the peripheral plasma of the pregnant pig as early as day 17 (Robertson & King, 1974; Robertson, King & Dyck, 1978). In the pregnant ewe, oestrone sulphate has been shown to be the predominant oestrogen in allantoic fluid and to be present in measurable concentrations as early as day 30 (Carnegie & Robertson,

Babesia bigemina in ticks grown on non-bovine hosts and its transmission to these hosts

Parasitology ◽  
1965 ◽  
Vol 55 (2) ◽  
pp. 375-381 ◽  
Author(s):  
L. L. Callow
Keyword(s):  
Technical Assistance ◽  
Animal Research ◽  
Boophilus Microplus ◽  
Babesia Bigemina ◽  
Blood Smears ◽  
Animal Research Institute ◽  
Research Institute

The failure of Boophilus microplus to be cleansed of Babesia bigemina while the ticks were growing on non-bovine hosts, as well as the infection of the non-bovine hosts, was demonstrated in experiments in which infected ticks were released on a number of sheep, a goat and a horse.Seven of ten batches of ticks, collected from six non-bovine hosts, retained their babesia-infection.Blood subinoculated into cattle from seven of nine sheep and from the horse showed that these animals carried B. bigemina whilst the ticks were feeding on them. This suggested that ticks may have become reinfected from the non-bovine hosts, a possibility supported by the finding of B. bigemina in blood smears from two of the sheep.This work was performed at the Animal Research Institute, Yeerongpilly, and in the Department of Parasitology, University of Queensland, and supported by funds from both organizations. I am indebted to Mr G. D. Daly for technical assistance, to Professor J. F. A. Sprent and Dr H. M. D. Hoyte for their interest and help.

The role of stimulus comparison in animal perceptual learning: Effects of a distractor placement

2018 ◽  
Vol 71 (12) ◽  
pp. 2488-2496 ◽  
Author(s):  
Sergio A Recio ◽  
Adela F Iliescu ◽  
Isabel de Brugada
Keyword(s):  
Perceptual Learning ◽  
Learning Process ◽  
Time Lapse ◽  
Animal Research ◽  
Learning Effects ◽  
Stimulus Comparison ◽  
Human Research ◽  
Short Time ◽  
Effect Experiment

Research on perceptual learning shows that the way stimuli are presented leads to different outcomes. The intermixed/blocked (I/B) effect is one of these outcomes, and different mechanisms have been proposed to explain it. In human research, it seems that comparison between stimuli is important, and the placement of a distractor between the pre-exposed stimuli interferes with the effect. Results from animal research are usually interpreted in different terms because the type of procedure normally used in animal perceptual learning does not favour comparison. In our experiments, we explore the possibility that a distractor placed between the to-be-discriminated stimuli may interfere with the perceptual learning process in rats. In Experiment 1, two flavoured solutions are presented in an I/B fashion, with a short time lapse between them to favour comparison, showing the typical I/B effect. In Experiment 2, we introduced a distractor in between the solutions, abolishing this effect. Experiment 3 further replicates this by comparing two intermixed groups with or without distractor. The results replicate the findings from human research, suggesting that comparison also plays an important role in animal perceptual learning.

scholarly journals Relationship between life of mate butterflies and leading selection characteristics

2021 ◽  
Vol 244 ◽  
pp. 02028
Author(s):  
U. Khudayberdieva ◽  
S. Navruzov ◽  
N. Rajabov ◽  
O. Karimov ◽  
K.H. Fozilova
Keyword(s):  
Life Expectancy ◽  
National Economy ◽  
Economic Value ◽  
Breeding Work ◽  
Coefficient Of Variability ◽  
History Of ◽  
The Republic ◽  
Selection Work ◽  
Research Institute

This article examines the history of silkworm breeding, the role of silkworm breeding in the national economy of the Republic of Uzbekistan and the role of silkworm breeding in the development of the industry. This is because the interrelationship of traits of economic value is of great importance in selection and breeding work. The experiments were conducted in 2015-2017 at the Silk Research Institute of Uzbekistan. The life expectancy of the experimental butterflies was 10.9-12.8 days and the variability was 33.9-56.6%. The coefficient of variability indicates the degree of diversity in the population on this trait. Thus, it is clear from the results that the population of “Marvarid” and “Liniya 27” has the ability to carry out selection work on the sign of life expectancy of female butterflies.

Treating faecal sludges in ponds

2000 ◽  
Vol 42 (10-11) ◽  
pp. 283-290 ◽  
Author(s):  
M. Strauss ◽  
S. A. Larmie ◽  
U. Heinss ◽  
A. Montangero
Keyword(s):  
Field Research ◽  
Design Principles ◽  
Water Research ◽  
Waste Stabilisation Ponds ◽  
Pond System ◽  
Anaerobic Degradability ◽  
Research Institute

Waste stabilisation ponds are a widely accepted and proven technology to treat wastewater. It is often stipulated (and also practised) that the design of ponds for faecal sludges (FS), septage in particular, should follow the same principles as for wastewater. Field research conducted by SANDEC and its partners at the Water Research Institute in Ghana, and information gathered from the scarce literature on FS treatment, however, has shown that design principles should be taken into consideration, which are specific to the treatment of FS. These principles depend on the type of FS to be treated and on the type of pond system envisaged. Issues dealt with in this article are the handling of FS solids; the role of anaerobic ponds in FS treatment; the anaerobic degradability of septage; and ammonia (NH3–N) toxicity.

Role of animal research in human malignancies

2019 ◽  
pp. 1-29
Author(s):  
Abdul Q. Khan ◽  
Kodappully S. Siveen ◽  
Kirti S. Prabhu ◽  
Shilpa Kuttikrishnan ◽  
Sabah Akhtar ◽  
...  
Keyword(s):  
Animal Research

scholarly journals Survey stories in the history of British polar exploration: museums, objects and people

2018 ◽  
Vol 73 (2) ◽  
pp. 259-274
Author(s):  
Charlotte Connelly ◽  
Claire Warrior
Keyword(s):  
Polar Regions ◽  
Polar Research Institute ◽  
History Of ◽  
The Uk ◽  
Maritime Museum ◽  
Research Institute

This essay considers the two institutions that, between them, contain the most significant collections relating to British polar exploration in the UK: the Scott Polar Research Institute and the National Maritime Museum. A discussion of the differences between the two institutions, from their foundations to the substance of their collections, is followed by an indication of their similarities—particularly relating to the interpretation of the objects of exploration in museums, including artefacts of science and surveying. Histories of exploration, particularly in the polar regions, have been dominated by stories of individual sacrifice and achievement. This is despite the origins of many of the expeditions being rooted in scientific goals. This paper considers the role of survey stories within narratives of exploration, and the challenges that curators face in presenting them to audiences who continue to be drawn in by stories of well-known figures such as Scott and Amundsen.

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