Reproduction, nutrition, developpement最新文献

Effects of blood sampling procedures, grouping and adrenal stimulation on stress responses in the growing pig. 采血程序、分组和肾上腺刺激对生长猪应激反应的影响。

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890108

A Baldi, M Verga, M Maffii, E Canali, D Chiaraviglio, C Ferrari

引用次数: 17

[Properties of skeletal muscle fibers. II. Hormonal influences]. 骨骼肌纤维的特性。2荷尔蒙的影响)。

Reproduction, nutrition, developpement Pub Date : 1989-01-01

P Vigneron, J Dainat, F Bacou

{"title":"[Properties of skeletal muscle fibers. II. Hormonal influences].","authors":"P Vigneron, J Dainat, F Bacou","doi":"","DOIUrl":"","url":null,"abstract":"The skeletal muscle contains fibers with various contractile and metabolic properties. These populations of muscle fibers differ in their sensitivity and their response to circulating hormones which also affect the muscular differentiation (multiplication and fusion of myoblasts into myotubes). This review deals with the regulations of energy metabolism and of protein synthesis in muscles by several hormones acting either directly, or in association with other hormones, or by induction of growth factors. In most cases, hormonal effects seem to depend on the type and level of activity of the constitutive muscle fibers. The muscle fiber types involved in the anabolic properties of estrogens have not yet been clearly described. In the case of growth hormone and insulin, the slow fiber type is mainly affected; their effects are partially mediated through an increased secretion of somatomedins (IGFs) or by interaction on IGF receptors. The other reported hormones or factors induce a shift toward a more potent fast contracting activity, ultimately increasing the percentage of fast glycolytic fibers. Androgens, catecholamines and beta-agonists are anabolic and produce an enlargement of these fibers, whereas thyroid hormones or glucocorticoids in excess increase their catabolism.","PeriodicalId":20966,"journal":{"name":"Reproduction, nutrition, developpement","volume":"29 1","pages":"27-53"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13789418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of calcium and magnesium ions on the intestinal absorption of oleic acid in vitro. 钙、镁离子对油酸体外肠道吸收的影响。

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890104

A Bernard, M Fleith, H Carlier, J S Hugon

{"title":"Effect of calcium and magnesium ions on the intestinal absorption of oleic acid in vitro.","authors":"A Bernard, M Fleith, H Carlier, J S Hugon","doi":"10.1051/rnd:19890104","DOIUrl":"https://doi.org/10.1051/rnd:19890104","url":null,"abstract":"The effect of Ca++ and Mg++ upon intestinal absorption of oleic acid was investigated using two in vitro models: rat isolated jejunal loops at 30 degrees C and 37 degrees C and mouse jejunal explants at 37 degrees C. At 30 degrees C or at 37 degrees C, Ca++ significantly increased 14C oleic acid uptake by rat isolated jejunal loops or mouse jejunal explants; at 37 degrees C, Ca++ significantly enhanced lipid exocytosis in rat intestinal loops but not in mouse jejunal explants; in both models, in the presence of Ca++ and at 37 degrees C, Mg++ significantly improved the esterification of oleic acid phospholipids and triacylglycerols, as shown by the increase in triacyglycerol synthesis in rat isolated intestinal loops or by the increase in triacylglycerols recovered from the incubation media of mouse jejunal explants; experiments carried out with rat isolated jejunal loops highlighted the determinant role of temperature in oleic acid absorption processes. The present work shows that the simultaneous presence of Ca++ and Mg++ did not impede oleic acid absorption processes but, on the contrary, enhanced them.","PeriodicalId":20966,"journal":{"name":"Reproduction, nutrition, developpement","volume":"29 1","pages":"63-73"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1051/rnd:19890104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14064442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Growth hormones. II. Structure-function relationships. 生长激素。2结构关系。

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890101

N Chêne, J Martal, P de la Llosa, J Charrier

引用次数: 16

17 beta-estradiol secretion in normal and hypophysectomized chick embryos. 正常和去垂体的鸡胚的β -雌二醇分泌。

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890107

J P Weniger, J Chouraqui, A Zeis

引用次数: 7

Insulin-like growth factor I during growth in bulls. 在公牛生长过程中的胰岛素样生长因子I。

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890109

H Ronge, J Blum

引用次数: 30

Iodine nutrition in ewes: effects of low to high iodine intake on iodine content of biological fluids in pregnant and lactating ewes. 母羊的碘营养:低碘和高碘摄入对妊娠和哺乳期母羊生物体液碘含量的影响

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890110

G Aumont, M Lamand, J C Tressol

{"title":"Iodine nutrition in ewes: effects of low to high iodine intake on iodine content of biological fluids in pregnant and lactating ewes.","authors":"G Aumont, M Lamand, J C Tressol","doi":"10.1051/rnd:19890110","DOIUrl":"https://doi.org/10.1051/rnd:19890110","url":null,"abstract":"In a first experiment, 2 groups of 46 and 47 multiparous ewes received diets which provided an iodine intake of 0.36 and 0.26 mg/kg dry matter (group C) and, 2.01 and 1.94 mg/kg (group D), respectively, for pregnancy and lactation. In a second experiment, 3 groups of 10 nulliparous ewes received diets which provided an I intake of 0.13 and 0.12 mg/kg dry matter (group A), 0.22 and 0.20 mg/kg dry matter (group B), and 10.77 and 8.88 mg/kg dry matter (group E), respectively, for pregnancy and lactation. Observations and sampling were carried out on the ewes from the first third of pregnancy to the 2nd and the 6th week of lactation. The diets provided adequate nutrition for pregnant and lactating ewes. Dietary I content had no effect on the dry matter intake, the size or the weight of the litter and the length of pregnancy. Plasma inorganic iodine (PII) was less affected by the I intake during lactation than during pregnancy. The excretion of I in milk induced a decrease in PII between pregnancy and lactation. The I in urine expressed as microgram I/g creatinine was largely affected by the intake. Colostrum I was 6.7, 4.0, 1.2, 1.3 and 1.5 times higher in groups A, B, C, D and E than the I in milk collected 1 week postpartum. Milk iodine (MI) content and the ratio MI/PII were markedly dependent on the I intake. During pregnancy, plasma T4 concentration decreased for each group. Plasma T4 concentration remained low during lactation in the low I intake group, whereas it increased at the same time in the other groups. The plasma T3 concentration decreased at the 6th week of lactation in the highest I intake group. Experimental values showed that 0.12 mg I/kg dry matter induced depletion in the I stocks of pregnant and lactating ewes, whereas an I intake above 10 mg I/mg dry matter disturbed the metabolism of thyroid hormones.","PeriodicalId":20966,"journal":{"name":"Reproduction, nutrition, developpement","volume":"29 1","pages":"113-25"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1051/rnd:19890110","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14063734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

In vivo 13C NMR studies of glucose catabolism by isolated rumen bacteria. 瘤胃细菌葡萄糖分解代谢的体内13C核磁共振研究。

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890106

J P Grivet, J Stevani, G Hannequart, M Durand

引用次数: 0

Plasma lactose after weaning and its relationship with lactose content of milk, post-weaning plasma oestradiol-17 beta and weaning to mating interval in sows. 母猪断奶后血浆乳糖含量及其与乳中乳糖含量、断奶后血浆雌二醇-17 β和断奶至配种间隔的关系

Reproduction, nutrition, developpement Pub Date : 1989-01-01 DOI: 10.1051/rnd:19890105

J J Matte, L A Guilbault, P Dubreuil, D Petitclerc, G Pelletier

{"title":"Plasma lactose after weaning and its relationship with lactose content of milk, post-weaning plasma oestradiol-17 beta and weaning to mating interval in sows.","authors":"J J Matte, L A Guilbault, P Dubreuil, D Petitclerc, G Pelletier","doi":"10.1051/rnd:19890105","DOIUrl":"https://doi.org/10.1051/rnd:19890105","url":null,"abstract":"Twenty first-liter sows were used to investigate the relationship between plasma lactose concentrations following weaning and milk production, total milk content of lactose, post-weaning plasma oestradiol-17beta (E2) concentration and weaning to mating interval. Milk production was estimated from 6 out of 8 hourly successive \"weighing-suckling-weighing\" of piglets on day 21 of a 28-day lactation. Sows were cannulated in the jugular vein and sampled at 8-h intervals from 2 h to 66 h after weaning. Plasma lactose concentrations (means +/- SE) after weaning increased from 52 +/- 4 microM at the beginning of sampling to a peak value of 183 +/- 23 microM 40 h later and then decreased to 91 +/- 11 microM 66 h after weaning (P less than 0.001). Milk production on day 21 (7.5 +/- 0.3 kg) and the corresponding milk content of lactose (400.5 +/- 0.2 g) were not related (P greater than 0.10) to area under the curve, timing, amplitude and spreading of the lactose peak in plasma. Similarly, none of the characteristics of the lactose peak were related (P greater than 0.10) to weaning to mating interval. There was a linear increase (P less than 0.0001) in mean plasma E2 concentrations (means +/- SE) from 5.6 +/- 0.3 pg/ml, 2 h after weaning, to 12.9 +/- 1.2 pg/ml at the end of the sampling period. On a within-sow basis, there was a correlation (r = 0.28; P less than 0.01) between post-weaning plasma lactose and E2 concentrations. Results showed the existence of the post-weaning peak of plasma lactose in sows.(ABSTRACT TRUNCATED AT 250 WORDS)","PeriodicalId":20966,"journal":{"name":"Reproduction, nutrition, developpement","volume":"29 1","pages":"75-82"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1051/rnd:19890105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14064443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

[Marker transfer between food particles during digestive transit in the rabbit. Estimation method based on fecal granulometry]. [家兔消化过程中食物颗粒之间的标记转移。基于粪便颗粒计的估算方法[j]。

Reproduction, nutrition, developpement Pub Date : 1989-01-01

T Gidenne

{"title":"[Marker transfer between food particles during digestive transit in the rabbit. Estimation method based on fecal granulometry].","authors":"T Gidenne","doi":"","DOIUrl":"","url":null,"abstract":"Five adult rabbits (New Zealand White x Californian) were fed ad libitum for 10 days a pelleted feed compound containing dehydrated lucerne whose particles (0.05-0.5 mm in size) were marked with a rare earth, i.e. ytterbium (Yb). In order to estimate the proportion of marker liable to leave its initial site of binding, we measured the amount of ytterbium present on faeces particles larger than 0.5 mm. The total amount of faeces was collected during the following 3 days. The faeces screening technique used in this study was adapted from that applied to feed. However, the repeatability was low for the large particles (greater than 1 mm), whose number was small. Half of the digesta particles (52%) exhibited a smaller size than 0.05 mm. The proportion of large particles (greater than 1 mm) in the faeces was low (1.5%) while that of the other particle classes ranged from 20-33.5%. After pelleting, more than 40% Yb initially bound to lucerne particles measuring 0.5 to 0.05 mm, was present on fine particles (less than 0.05 mm). Accordingly, only minima and maxima amounts of Yb having migrated on large particles (greater than 0.5 mm) could be measured, i.e. 2.5 and 8.9%, respectively of the ingested Yb. Taking also into account a migration towards small particles, about 10% Yb was liable to leave its initial site during its passage through the digestive tract of the rabbit.","PeriodicalId":20966,"journal":{"name":"Reproduction, nutrition, developpement","volume":"29 1","pages":"55-62"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14063735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0