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Biomedical subjects

M Gallardo

Publications and source records attributed to M Gallardo.

34 records · Page 2Linked to original sources
PubMed1991

Ethylene Production and 1-Aminocyclopropane-1-Carboxylic Acid Conjugation in Thermoinhibited Cicer arietinum L. Seeds.

The effect of supraoptimal temperatures (30 degrees C, 35 degrees C) on germination and ethylene production of Cicer arietinum (chick-pea) seeds was measured. Compared with a 25 degrees C control, these temperatures inhibited both germination and ethylene production. The effect of supraoptimal temperatures could be alleviated by treating the seeds with ethylene. It was concluded that one effect of high temperature on germination was due to its negative effect on ethylene production. This inhibitory effect of high temperature was due to increased conjugation of 1-aminocyclopropane-1-carboxylic acid to 1-(malonylamino)cyclopropane-1-carboxylic acid and to an inhibition of ethylene-forming enzyme activity.

Journal Article↗
PubMed1989

Quantitative determinations of chemical compounds with nutritional value from Inca crops: Chenopodium quinoa ('quinoa').

Quantitative determinations of total and soluble proteins, total and free sugars, starch, total lipids, tanins, ash (Ca, Na, K, Fe, and P), and caloric value were carried out on quinoa flour. Results show that the amount of soluble proteins was higher than the standard value for wheat and maize and was very close to that of barley's. The yield of free sugars like glucose (4.55%), fructose (2.41%) and sucrose (2.39%) were also of importance. Iron and calcium levels were higher than the reported values for maize and barley. The same occurred for the caloric value (435.5 Kcal/100 g). The content of saponins was also examined since its effect on red blood cells of group A and O has been related as a potential problem of the Andes population. From the chemical analysis a more complete view about quinoa as human food was presented.

Carbohydrates↗
PubMed1989

[Fulminant hepatic insufficiency].

We studied the patients admitted to the Intensive Medicine Department of the "Carlos Haya" Regional Hospital of Málaga (Spain) with a diagnosis of fulminant liver failure (IHF) between 1980 and October 1986. There were 7 patients, 6 women and one man: 5 had a picture of fulminant hepatitis, one pregnant female had fatty liver, and the man had fulminant hepatitis due to accidental inhalation of carbon tetrachloride. The average age of the group was 32 years. Six patients (85%) died; their average stay was 4.6 days, ranging from 10 hours to 7 days. The woman who survived spent 17 days in the unit. Postmortem studies were made in 4 patients. In the pregnant patient with fatty liver, 36 weeks gestation, a cesarean was performed and a live female fetus of 2,720 g. weight was extracted. Some pathogenic aspects of the disease are discussed, such as the incidence of superinfection by other viruses (delta virus), the influence of immunological factors on the development of fulminant liver failure, morphological findings, therapeutic results and the need for multicenter studies.

Adolescent↗
PubMedDate not supplied

Inhibition of xylazine induced uterine contractility by clenbuterol and nifedipine.

A study was undertaken in order to determine the effects of xylazine on uterine contractility in goats premedicated with clenbuterol or nifedipine. These drugs inhibit uterine activity by acting as potent tocolytic or uterine relaxant agents. A balloon-tipped catheter was inserted under sedation and local anaesthesia on to a uterine horn in 15 cycling goats in order to record intrauterine pressure changes. Three groups of five goats were used: group I was treated with an intravenous dose of 0.1 mg kg-1 of xylazine. Groups II and III were pretreated with 4 micrograms kg-1 of clenbuterol and 80 micrograms kg-1 of nifedipine, respectively, before administrating the same dose of zylazine. Xylazine increased the frequency and intensity of uterine contractions significantly and the value of the area under the contraction curves was significantly higher than that observed under basal conditions i.e. before drug treatment. In goats premedicated with clenbuterol or nifedipine, the uterotonic effects of xylazine (2858 +/- 217 versus basal contractility: 1241 +/- 173 mm2.5 min-1, P < 0.05) were inhibited for the 30 minutes recording period. These data indicate that clenbuterol and nifedipine can be used as potent tocolytic agents in order to prevent the uterine side effects of xylazine.

Adrenergic alpha-Agonists↗
PubMedDate not supplied

Bilayer distribution of phosphatidylserine and phosphatidylethanolamine in lipid vesicles.

The distribution of phosphatidylethanolamine (PE) and phosphatydilserine (PS) in liposomes was studied as a function of aminophospholipid concentration using fluorescamine as labeling reagent. The method is suitable for such determination since, in the assay conditions, fluorescamine does not penetrate the vesicles nor does it disrupt them. The liposomes were obtained by sonication, extrusion, or mechanical dispersion (MLV). For any kind of vesicle, the percentage of PS in the external monolayer is higher than that obtained for PE in the corresponding vesicles. In extruded PS liposomes, this aminophospholipid is located preferentially in the outer layer, while for PE liposomes the localization depends on the size of vesicle. Sonicated liposomes present an asymmetrical distribution of both aminophospholipids, and the external location of PS or PE always predominates. In contrast, in MLV, aminophospholipids are mainly found in the inner layers of the vesicles, except for liposomes formed by the lowest PS proportion. A remarkable feature of PS liposomes is the reduction of vesicle size, especially in MLV liposomes, in comparison with neutral liposomes.

Fluorescamine↗
PubMedDate not supplied

[Some new fleas of Chile (Siphonaptera) parasites of Ctenomys (Rod., Octodontidae)].

The authors examined 355 fleas of 9 species from Chili. These were collected from 7 species or subspecies of Ctenomys (Rod., Octodontidae). Tiamastus callens and Polygenis platensis cisandinus are new for this country; Tetrapsyllus maulinus sp. n., Plocopsylla fuegina sp. n. and Plocopsylla reigi sp. n. are described in this work.

Animals↗