Archivos de biologia y medicina experimentales最新文献_第2页

[V Annual Reunion of the Chilean Physiological Sciences Society. XII Annual Reunion of the Pharmacological Society of Chile. Talca, May 3-5, 1990. Abstracts]. [5]智利生理科学学会年会。第十二届智利药理学学会年会。塔尔卡，1990年5月3-5日。摘要]。

Archivos de biologia y medicina experimentales Pub Date : 1990-12-01

引用次数: 0

[II Congress of Biophysics of the Southern Cone. Punta de Tralca, 18-21 November 1990. Abstracts]. [2]南锥体生物物理学大会。1990年11月18日至21日，Punta de Tralca。摘要]。

Archivos de biologia y medicina experimentales Pub Date : 1990-12-01

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Increased secretion of adrenal progesterone explains the lack of response of oviductal embryo transport to a short intravenous infusion of estradiol in the rat. 肾上腺黄体酮分泌增加解释了大鼠输卵管胚胎运输对短时间静脉输注雌二醇缺乏反应。

Archivos de biologia y medicina experimentales Pub Date : 1990-12-01

F M Morán, M L Forcelledo, H B Croxatto

{"title":"Increased secretion of adrenal progesterone explains the lack of response of oviductal embryo transport to a short intravenous infusion of estradiol in the rat.","authors":"F M Morán, M L Forcelledo, H B Croxatto","doi":"","DOIUrl":"","url":null,"abstract":"Administration of estradiol (E2) as a single subcutaneous injection, but not as a short intravenous infusion (less than 150 min), accelerates oviductal embryo transport in pregnant rats although the first mode determines lower E2 circulating levels. Since progesterone (P) can antagonize the effect of E2 on embryo transport we examined the circulating P levels under these two modes of E2 administration. Rats were treated on day 1 of pregnancy with 5 micrograms E2 given s.c. or i.v. (10 min infusion). Other groups were either hypophysectomized (HPX), adrenalectomized (ADX) or ovariectomized (OVX) prior to E2 treatment to prevent P rise, or were treated with E2 plus RU486 to block the action of P. Some groups were autopsied at short intervals following treatment to measure P levels and others 24 h later to assess the effect of treatments on embryo transport. P was increased several fold by i.v. infusions of E2 or vehicle alone in intact and OVX rats but not in HPX or ADX rats, whereas s.c. administration of E2 did not change P levels unless it was given concomitantly with i.v. infusion of vehicle. The short i.v. infusion of E2 accelerated embryo transport in HPX, ADX, or RU486 treated rats but not in intact rats. The s.c. injection of E2 accelerated embryo transport even when it was accompanied by an i.v. infusion of vehicle. The data does not exclude the participation of glucocorticoids in the above phenomena but agrees with the view that it is the transient increase in adrenal P secretion which blunts the oviductal response to a brief pulse of E2.","PeriodicalId":75552,"journal":{"name":"Archivos de biologia y medicina experimentales","volume":"23 4","pages":"299-305"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13288260","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

[Physiopathology of cystic fibrosis]. [囊性纤维化的生理病理]。

Archivos de biologia y medicina experimentales Pub Date : 1990-12-01

D Wolff, A Stutzin

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[IV Annual Meeting of the Society of Cell Biology and XIV Annual Meeting of the Society of Biochemistry of Chile. Termas de Catillo, 30 August-1 September 1990. Abstracts]. 智利细胞生物学学会年会暨第十四届智利生物化学学会年会1990年8月30日至9月1日，卡蒂略任期。摘要]。

Archivos de biologia y medicina experimentales Pub Date : 1990-12-01

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[Isolation of transcription promoters from Thiobacillus ferrooxidans and T. acidophilus and its introduction by conjugation to T. intermedius]. [从氧化亚铁硫杆菌和嗜酸硫杆菌中分离转录启动子及其接合到中间硫杆菌]。

Archivos de biologia y medicina experimentales Pub Date : 1990-12-01

C Metz, H Sánchez, A Venegas

{"title":"[Isolation of transcription promoters from Thiobacillus ferrooxidans and T. acidophilus and its introduction by conjugation to T. intermedius].","authors":"C Metz, H Sánchez, A Venegas","doi":"","DOIUrl":"","url":null,"abstract":"The chemolithotrophic acidophilic bacteria, Thiobacillus ferrooxidans is considered as the most important microorganism in relation to copper and uranium bioleaching ability. Since T. ferrooxidans is a strict chemolithotrophic microorganism, its genetic manipulation is a very hard task. Until now, all efforts have been unsuccessful. Therefore, we decided to approach the problem in steps, trying initially to manipulate some T. ferrooxidans related strains. We chose Thiobacillus acidophilus that shares its habitat with T. ferrooxidans and Thiobacillus intermedius, for its heterotrophic nature that makes them easier to grow and suitable for heterologous conjugation. The main objective of this work was directed towards the isolation and characterization of transcription promoters from T. acidophilus and T. ferrooxidans genomic DNA. Four different promoters from T. acidophilus and four from T. ferrooxidans were isolated and sequenced. In order to test their functional capacity in bacterial systems different from E. coli, they were subcloned and transferred to other bacteria. One of these recombinant plasmids was successfully transferred to T. intermedius and from it to Ps. putida. The subcloned promoter was able to confer streptomycin resistance to Ps. putida.","PeriodicalId":75552,"journal":{"name":"Archivos de biologia y medicina experimentales","volume":"23 4","pages":"285-97"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13288259","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

ARIMA modelling of chronospsychometric self-evaluation of drive and mood. 驱动和情绪的时间同步自我评价的ARIMA模型。

Archivos de biologia y medicina experimentales Pub Date : 1990-12-01

L Firinguetti, A Sciolla, F Lolas, L Risco, M Larraguibel

{"title":"ARIMA modelling of chronospsychometric self-evaluation of drive and mood.","authors":"L Firinguetti, A Sciolla, F Lolas, L Risco, M Larraguibel","doi":"","DOIUrl":"","url":null,"abstract":"The expanding study of biological rhythms requires the use of refined methods of time series analysis. We propose the use of ARIMA (Autoregressive Integrated Moving Averages) model, a powerful statistical tool of relatively recent development. A group of 5 patients with Affective Disorders (2 bipolars, 3 unipolars) and 1 patient with Adjustment Disorder self-assessed their AS every 8 hours for about a month. The affective state (AS) was estimated for 4 indicators: the two main constructs (Mood and Drive) of the segmented Visual Scale ESTA III and two bipolar items (Anxiety and Drowsiness). Mood and Drive are continuous variables, while Anxiety and Drowsiness are ordinal ones. Strictly speaking, ARIMA modelling is not valid with ordinal data. However, comparison of models of the two kinds of variables reveals no significant differences. This points out to a certain robustness of the method. Most of the series were non-stationary but could be transformed taking no more than two differences. The models made a very good fit of the data. Statistically significant coefficients on different lags may indicate the presence of circadian and infradian periodicities in the series. Further applications of ARIMA models to biological and psychological rhythmometry may be quite useful.","PeriodicalId":75552,"journal":{"name":"Archivos de biologia y medicina experimentales","volume":"23 4","pages":"307-14"},"PeriodicalIF":0.0,"publicationDate":"1990-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13288261","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

[33rd annual meeting: Society of Biology of Chile and the associated societies. 21-23 November 1990. Punta de Tralca, Chile. Abstracts]. [第33届年度会议:智利生物学会及相关学会。]1990年11月21日至23日。智利Punta de Tralca。摘要]。

Archivos de biologia y medicina experimentales Pub Date : 1990-11-01

引用次数: 0

[In vitro regeneration and applications using vegetable cell and tissue culture]. 植物细胞和组织培养的体外再生及其应用

Archivos de biologia y medicina experimentales Pub Date : 1990-10-01

M Jordán

引用次数: 0

[Use of non radioactive probes to assess gene copy numbers and for the diagnosis of molecular diseases]. [利用非放射性探针评估基因拷贝数和分子疾病的诊断]。

Archivos de biologia y medicina experimentales Pub Date : 1990-10-01

G León, R Amthauer, M Concha, R I Muñoz, I Vega, M I Vera, J Villanueva, M Krauskopf

引用次数: 0