A pilot study into the effects of various dietary restriction schedules in rabbits

Ad libitum feeding in rabbits quickly leads to obesity. In order to prevent obesitye various dietary restriction schedules were studied for their effects on body weight. food and water intake, food conversion, blood lipid parameters (triglycerides, total cholesterol). kidney function (blood urea and creatinine), en7ymes (ALP. ALT, AST, GGT) and various autopsy parameters. In this pilot study the effects of ad libitum feeding (AL) were compared to feeding 60% of the ad libitum amount in the morning (FR), having food freely available during working hours (7.30-14.30 hr; NFR) and in between working hours (14.30-7.30 hr: DFR), The DFR schedule did not give reduced food intakes nor body weights as compared to the ad libitum feeding, and can therefore not be regarded as food restriction. The food intake in the NFR group was comparable to the food intake in the FR group and both obtained food during daytime However, there was a significantly higher food conversion and water intake in the FR group only. The reason for this is unclear. Blood ereatinine values were significantly higher in the FR and NFR groups. Whether this was related to food searching activity during the dark hours, leading to creatine release from muscletissue, needs further study

An alternative method for rat fixation when giving subcutaneous, intramuscular and intraperitoneal injections (“Camilla's method”)

No abstract availabl

Fatty acid composition of commercial rodent diets

No abstract availabl

Sensing Sound And Space:Auditory And Visual Spatial ImpressionIn Three Auditoria

In some contexts, the experience of sound and space are often considered as two unrelated experiences. In an auditorium, the senses of hearing and seeing are not necessary unrelated. This thesis proposes that there is a sensorial relationship between sound and space in the context of symphonic concert halls. Through a study of three auditoria, this thesis explores the relationship, and the degree of correspondence and interaction between auditory and visual spatial impression. It begins by exploring the concepts of auditory and visual spatial impression in relation with auditorium acoustics and architectural design. In auditorium acoustics, a number of terms are used to describe auditory spatial impression, such as 'spaciousness,' 'envelopment,' and 'intimacy.' These terms have connotations beyond the auditory. The thesis suggests that they may also be used to describe visual spatial impression in auditoria. Through textual analyses, the thesis finds that the auditory and visual terms do not always relate to the same physical characteristics of auditoria and can conflict with one another. Hence, it is apparent that further subjective analyses of auditory and spatial impression are needed. Three chapters in this thesis are devoted to auditory and visual subjective experiments. Their purpose is to explore the degree of correspondence or contrast, and interaction between auditory and visual spatial impression. The degree of correspondence and contrast between auditory and visual spatial impression appear to vary between auditoria and within auditoria. The relationship between auditory and visual spatial impression appear to be both necessary and arbitrary, and the degree of interaction between them appear to be strong in some cases and weak in other. From the findings, this thesis suggests that the degree of correspondence or contrast, and interaction between auditory and visual spatial impression could be used to create an audiovisual experience that suit specific musical events. Concert auditoria are culturally and artistically unique spaces. Hence, consideration must be taken to understand the relationships between, and intentions of the acoustical and architectural designs, music and architecture, for a successful and creative collaboration between designers - since the ultimate goal is to create an extraordinary audiovisual experience in a concert hall

Bacteriological quality and intake of acidified drinking water in Wistar rats is pH-dependent

The effects of acidification of drinking water on bacteriological quality and water intake in adult, male Wistar rats. was studied in 2 consecutive experiments. HCl was used to aeidify water to pH 2.5, 3.0 and 3.5. Control groups received untreatedtap or demineralized water. Acidification of water with HCl to pH 2.5 effectively prevented growth of aerobic bacteria in the drinking water bottles after a number of days, but also caused a reproducible decline in water intake when compared to untreated water. A reduced water intake may indicate disturbed wellbeing and may interfere with experimental results. Acidification to pH 3.0 also kept bacteriological counts low and did not reduce water intake when compared to rats drinkingnon-acidified water. Acidification to pH 3.5 led to high bacteriological counts after a few days. On the basis of these 2 experiments, acidification of drinking water with 1101 to pH 3.0 is advised

Evaluation of quality systems for animal units: report of the Scand-LAS working group

No abstract availabl