Water distribution in the hypothermic dog

Thesis (M.A.)--Boston Universit

Ventricular fibrillation in experimental hypothermic cardiac surgery, the evaluation of antifibrillary agents

Thesis (M.A.)--Boston Universit

Ventricular fibrillation in experimental hypothermic cardiac surgery, the evaluation of antifibrillary agents

Thesis (M.A.)--Boston Universit

Med news

The Med News was a newsletter published from 1960-1962 by the Student American Medical Association (SAMA) at Boston University School of Medicine

Evolution of secondary metabolites in legumes (Fabaceae)

AbstractLegumes produce a high diversity of secondary metabolites which serve as defence compounds against herbivores and microbes, but also as signal compounds to attract pollinating and fruit-dispersing animals. As nitrogen-fixing organisms, legumes produce more nitrogen containing secondary metabolites than other plant families. Compounds with nitrogen include alkaloids and amines (quinolizidine, pyrrolizidine, indolizidine, piperidine, pyridine, pyrrolidine, simple indole, Erythrina, simple isoquinoline, and imidazole alkaloids; polyamines, phenylethylamine, tyramine, and tryptamine derivatives), non-protein amino acids (NPAA), cyanogenic glucosides, and peptides (lectins, trypsin inhibitors, antimicrobial peptides, cyclotides). Secondary metabolites without nitrogen are phenolics (phenylpropanoids, flavonoids, isoflavones, catechins, anthocyanins, tannins, lignans, coumarins and furanocoumarins), polyketides (anthraquinones), and terpenoids (especially triterpenoid, steroidal saponins, tetraterpenes). While some secondary metabolites have a wide distribution (flavonoids, triterpenes, pinitol), however, others occur in a limited number of taxa. The distributions of secondary metabolites with an irregular occurrence are mapped on a molecular phylogeny of the Fabaceae, reconstructed from a combined data set of nucleotide sequences from rbcL, matK and ITS genes. In most cases, the distribution patterns of secondary metabolites do not agree with the phylogeny of the plants producing them. In contrary, the distribution of many secondary metabolites is patchy and irregular. Thus, the use of phytochemical data to reconstruct a phylogeny of plants is often not informative and can be misleading. The patchy distribution may be due to convergent evolution, a contribution of endophytic fungi or more likely, to an early acquisition of the key genes of secondary metabolism in the evolution of land plants among others by horizontal gene transfer from bacteria. Thus it would be a matter of gene regulation whether these genes are active in some but not all taxa

El respeto a la libertad religiosa de los contrayentes y la obligatoriedad de la celebración civil del matrimonio previa a la religiosa. Discusión doctrinal y propuestas 'de lege ferenda' en el Derecho comparado centroeuropeo

La discusión que se planteó en Centroeuropa acerca de la conveniencia de mantener la obligatoriedad del 'primado' del matrimonio civil, ofrece nuevas reflexiones sobre la relación entre la forma del matrimonio y sus elementos estructurales básicos, como la heterosexualidad. Del estudio de las leyes de matrimonio civil de Austria se concluye que para el respeto de las formas religiosas de celebración del matrimonio parece mejor la fundamentación en la libertad religiosa de los contrayentes que en la vertiente institucional. La doctrina de Lutero considera el matrimonio una cuestión civil, por ello los fieles evangélicos aceptan el régimen matrimonial establecido por la autoridad secular, si se respetan los elementos del matrimonio natural. El Derecho civil alemán no ha llamado a las uniones homosexuales matrimonio. Si la normativa civil del matrimonio se aparta de los elementos comunes con el matrimonio natural, los ciudadanos evangélico-luteranos se verán obligados a influir más eficazmente en el régimen del matrimonio civil o a impulsar el cambio hacia un sistema de matrimonio electivo. ------ The discussion that was raised in Central Europe about the expediency of maintaining the obligatory nature of 'primado' of civil marriage, offers new reflections about the relationship between the form of marriage and its structural basic elements, like heterosexuality. From the study of civil marriage laws in Austria, it is concluded that for the respecte of the religious forms of celebration of marriage it seems better the foundation in religious liberty of the contracting parties than in the institutional point of view. Luther's doctrine considers marriage a civil question. The evangelicals accept the marriage regulations established by the secular authority if the elements of natural marriage are respected. German civil law has not called to homosexual marriages. If the civil norms of marriage separate from the common elements of natural marriage, the Lutheran evangelicals will be obliged to influence more efficiently in the rules of civil marriage or impel a change towards a system of elective marriage

Cyanogenesis in the Euphorbiaceae

Fresh samples of nine species included in the family Euphorbiaceae, Acalypha qracilens, Acalypha ostryaefolia, Acalypha rhomboidea, Acalypha virginica, Chamaesyce maculata, Chamaesyce supina, Cnidoscolus stimulosus, Euphorbia corollata, and Poinsettia dentata, were tested for the production of cyanide using the Feigl-Anger technique. Two of these taxa were tested for polymorphism of cyanogenesis by repeated testing of the same individuals within a population. Two of these nine species, Acalypha ostryaefolia and Cnidoscolus stimulosis, gave positive results, although not every individual tested was positive. One of the species tested for polymorphism, Acalypha ostryaefolia, proved to be polymorphic for the production of cyanogenic compounds. Euphorbia corollata was not found to be positive for hydrogen cyanide liberation. Dried material from 624 specimens, representing 105 species, in the Stover Herbarium at Eastern Illinois University, were also tested for cyanide production. Twelve species representing five tribes of the Euphorbiaceae in the herbarium were found to be cyanogenic. Ninety-five species of the family Euphorbiaceae, representing 20 tribes, have previously been reported as cyanogenic. Literature dealing with these reports is reviewed, emphasizing the plant parts tested and cyanogenic compounds which have been isolated

Electrophysiology of the hypothermic heart

Thesis (Ph.D.)--Boston University.In the past decade, hypothermia has been extensively investigated as a means of reducing oxygen requirements of the body sufficiently to allow exclusion of the heart from the circulation and so permit intracardiac surgery under direct vision. Because of its ability to reduce metabolism, it has suggested itself as a potentially valuable technique not only in a variety of clinical conditions but as an investigative tool for the elucidation of normal bodily functions. One of the inevitable consequences of inducing hypothermia in mammals is the increased irritability or electrical instability displayed by the myocardium, culminating in the terminal event, ventricular fibrillation. The purpose of the present experimental study: to attempt a quantitative evaluation of the nature and magnitude of change provoked by hypothermia in the fundamental cardiac parameters of rhythmicity, conduction, refractoriness and excitability as well as the processes of depolarization and repolarization, with a view to determining, if possible, the electrophysiological basis for the increased susceptibility to cardiac arrhythmias [TRUNCATED