87 research outputs found
‘Oh you pretty thing!’: How David Bowie ‘unlocked everybody’s inner queen’ in spite of the music press
The 1967 Sexual Offence Act decriminalised homosexual acts between men allowing gay men to discuss their sexuality in public. Few prominent popular musicians came-out until 1972 when David Bowie claimed that he was bisexual in an interview with Melody Maker. Music papers and Bowie had substantial cultural power: Bowie was a rising star and music papers recruited journalists who discussed and perpetuated social change. The subsequent conversation, however, reinforced negative stereotypes in constructing the queer subject and tried to safeguard commercial concerns due to the assumption that the market for popular music avoided queer music. This undermined arguments that associate permissive legislation with a permissive media and society, but, to some, representation alone empowered people and destabilised preconceptions about queer identity.Published versio
Utilisation énergétique du diacétate de propylène glycol par le rat en croissance
National audienc
Emissions annuelles de méthane d'origine digestive par les bovins en France. Variation selon le type d'animal et le niveau de production
National audienceRuminants are sometimes accused of contributing greatly to the greenhouse effect due to their methane production of digestive origin. Daily methane emissions of most types of cattle were determined using respiration chambers. Animal methane emissions of digestive origin by dairy and beef cattle in France were calculated taking into account the various types and levels of animal production, variations in feeding regimen along the year and the number of bovines in each category in 1993. Yearly methane emission by a dairy cow ranges from 140 to 160 m3 for milk yields ranging from 3400 to 6500 kg per year. Methane production decreases from 41 to 25 l/kg milk for the same range of milk yield. Yearly methane emission averages 120 m3 for a beef cow. It ranges from 56 to 78 m3 for growing dairy or beef cattle depending on type of production and growth rate. However, methane emission per kg carcass produced decreases when body weight gain increases. It ranges from 0.32 to 0.49 m3/kg for dairy cattle and from 0.58 to 1.04 m3/kg for beef cattle when the methane production of the dam over one year is included. Total methane emissions by cattle in France were about 1.86 109 m3 in 1993, of which 38 % was produced by 4.6 million dairy cows, 6 % by dairy heifers (future breeding herd), 26 % by 4.0 million beef cows, 7 % by beef heifers (future breeding herd) and 23 % by 6.6 million growing cattle destined to meat production. Various means for reducing methane emissions by cattle and other sources are discussed.Les ruminants sont parfois accusés a priori de contribuer largement à l’effet de serre en raison de leur production de méthane d’origine digestive. Les émissions journalières de méthane des principaux types de bovins ont été déterminées à l’aide de chambres respiratoires. Les émissions annuelles de méthane d’origine digestive des bovins laitiers ou à viande en France ont été calculées en tenant compte des types d’animaux, des niveaux de production, du type d’alimentation au cours de l’année et des effectifs en 1993. L’émission de méthane d’une vache laitière est comprise entre 140 et 160 m3 par an pour une production laitière variant de 3 400 à 6 500 kg. La quantité de méthane émise en moyenne par kg de lait passe de 41 à 25 litres pour cette même plage de production. L’émission de méthane d’une vache allaitante est en moyenne de 120 m3/an. Celle des bovins en croissance se situe entre 56 et 78 m3/an selon la vitesse de croissance et le type de production. En revanche, l’émission de méthane par kg de carcasse produite diminue lorsque la vitesse de croissance augmente ; elle se situe entre 0,32 et 0,49 m3/kg pour les bovins de races laitières et entre 0,58 et 1,04 m3/kg pour les bovins de races bouchères si on inclut la production de méthane de la mère pendant un an. Ainsi, l’émission totale de méthane des bovins en 1993 est de l’ordre de 1,86 milliard de m3 (soit 1,33 millions de tonnes) dont 38 % par les 4,6 millions de vaches laitières et 6 % par les génisses futures reproductrices, 26 % par les 4,0 millions de vaches allaitantes, 7 % par les génisses futures reproductrices et 23 % par les 6,6 millions de bovins en croissance destinés à la production de viande. Les possibilités de réduire les émissions de méthane des ruminants et des autres sources de pollution sont discutées
Nature et importance des pertes de poids consécutives à la contention chez le rat en croissance
National audienceFrom general considerations on pig farming, we have noted the experimental advantage presented by the analogy between the pig and the rat concerning the reaction to restraint stress. This sort of stress undergone during transportation results in an appreciable increase in the weight loss in pigs and the purpose of this study was to show that the same applies to the rat. By direct weighing in one hand and by measurement of the gaseous exchanges between the animal and its surroundings atmosphere in the other hand, we observed an increase of a4gbout p. 1 00 in the weight loss after 3 hours restraint. 9 -080 p. ioo was due to the cutaneous and respiratory emission of water vapour, the remainder was due to the difference between the weight of carbonic gas expired and that of oxygen inspired. Over a 7-hour period of stress the intake of oxygen increased by 06 p. 1 00 whereas the respiratory quotient decreased more rapidly than in rats not restrained. These results are discussed with relation to the various metabolism involved in stress reaction
Orientation propionique du profil fermentaire ruminal (conséquences sur le métabolisme splanchnique des nutriments énergétiques et sur la fourniture et l'utilisation du glucose par le muscle chez l'agneau recevant du fourrage vert)
RENNES-Agrocampus-CRD (352382323) / SudocSudocFranceF
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