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| Registros recuperados: 239 | |
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| VARANDA,E. A.; TAVARES,D. C.. |
| Since 1949, a great deal of research has been carried out on the radioprotective action of chemical substances. These substances have shown to reduce mortality when administered to animals prior to exposure to a lethal dose of radiation. This fact is of considerable importance since it permits reduction of radiation-induced damage and provides prophylactic treatment for the damaging effects produced by radiotherapy. The following radioprotection mechanisms were proposed: free radical scavenger, repair by hydrogen donation to target molecules, formation of mixed disulfides, delay of cellular division and induction of hypoxia in the tissues. Radioprotective agents have been divided into four major groups: the thiol compounds, other sulfur compounds,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Radiation; Protective agents; Honeybee venom. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301998000100002 |
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| BERGDOLL,M. S.. |
| Toxic shock syndrome is a staphylococcal disease caused by toxins produced by the staphylococci, toxic shock syndrome toxin-1 and enterotoxin B. The disease results from staphylococci growing in the vagina with the use of tampons during menstruation, primarily in young women. However, any staphylococcal infection can result in toxic shock syndrome if the staphylococci produce the appropriate toxins and the individual has no antibodies to the toxins. The symptoms can be quite severe, with high fever, low blood pressure, diffuse macular erythroderma, orthostatic dizziness, vomiting and or diarrhea at the onset, severe myalgia, peeling of the skin of the palms of the hands and the soles of the feet after seven to ten days, and death in some cases. The disease... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Toxic shock syndrome; Toxic shock syndrome toxin; Staphylococci; Enterotoxins; Antibodies. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301997000100002 |
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| ABREU,R.M.M.; MORAES,R.L.M. SILVA de; MALASPINA,O.. |
| This paper analyzes the summer and winter total protein content of 7, 14, 21, 28, 35, and 40-day old Apis mellifera L. worker venom glands before (control) and 24 and 96 hours after applying electrical shocks for venom extraction (experimental). During venom extraction, 7-day old workers responded more slowly and weakly to electrical shocks. This response intensifies with age, so that the workers approaching 20 days old respond faster and more aggressively to the shocks. Statistical analysis, using the non-parametric Wilcoxon and Kruskall-Wallis tests and complemented by the Jonckheere test, showed that the protein content varied from one age to another in the experimental group, which was well distinguishable from the values in the control Group in summer... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bees; Histology; Protein content; Summer; Winter; Electrical shock; Venom gland; Apis mellifera. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000100006 |
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| SILVA,R. J. DA; FECCHIO,D.; BARRAVIERA,B.. |
| The effect of Crotalus durissus terrificus (LAURENTI, 1768) venom on the evolution of Ehrlich ascites tumor cells was evaluated. Thus, 30-day-old male mice of the Swiss strain were inoculated intraperitoneally with 1x10<img SRC="http:/img/fbpe/jvat/v3n2/image1947.gif"> tumor cells. Then, 7 groups of animals were formed: 3 control groups (physiological, venom and tumor) and 4 experimental groups that received different doses of venom. The experimental groups received 5 intraperitoneal venom injections on the 1<img SRC="http:/img/fbpe/jvat/v3n2/image1948.gif"> , 4<img SRC="http:/img/fbpe/jvat/v3n2/image1949.gif"> , 7<img SRC="http:/img/fbpe/jvat/v3n2/image1949.gif"> , 10<img SRC="http:/img/fbpe/jvat/v3n2/image1949.gif"> and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Venom; Inflammation; Tumor growth; Crotalus durissus terrificus. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301997000200008 |
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| COSTA,H.; TALORA,D. C.; PALMA,M.S.; CHAUD-NETTO,J.. |
| The effect of pheromones and their chemical analogues in honeybee alarm behaviors was studied in observation boxes. Defensive behaviors, as follows: a) attraction to scent source, b) elevation of wings in "V", c) abdomen elevation, d) abdomen elevation and pumping and e) first leg pair elevation had been temporarily registered when the following compounds were presented: isoamyl alcohol, octyl alcohol, benzyl alcohol, n-butyl acetate, n-octyl acetate, isopentyl acetate, benzyl acetate and 2-heptanone. The results were as follows: 1. the bees elicited some characteristic behaviors when chemical alarm messages were presented, 2. agression (stinging) was not completed with any compound tested, probably because there was not a target (visual stimulus), 3. in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis mellifera; Defensive behavior; Alarm behaviors; Pheromones; Hybrid honey bees; Chemical communication. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301996000100005 |
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| LIPPS,B. V.. |
| The pharmacological substances adenosine deaminase (ADA), histamine, and IgE are endogenously present in animals. They are implicated in allergy and asthma and detectable in blood serum. This research reports the presence of ADA, histamine, and IgE at varying levels in almost all major organs of mice. This research further reports that intramuscular injection of sub-lethal dose of Naja kaouthia venom disrupted homeostasis and lowered the levels of ADA, histamine, and IgE in the organs of mice. Adult Balb/C male mice were injected with a half lethal dose of the venom. The mice were sacrificed at 2, 8, and 24 hours post-injection and different organs were collected. Organs were homogenized, centrifuged, and the supernatants were assayed for ADA, histamine,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cobra venom; Balb/C mice organs; Adenosine deaminase; Histamine; IgE; Naja kaouthia. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302002000100006 |
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| Registros recuperados: 239 | |
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