Leaf Marks in Medicago, With Special Reference to Their Inheritance in Medicago truncatula

1974 ◽  
Vol 22 (1) ◽  
pp. 67 ◽  
Author(s):  
JA Mccomb

Leaf marks in the genus Medicago are described and the anatomical basis and genetic control of marks and flecks in M. truncatula analysed. The purple pigment in flecks or marks is confined to the epidermal cells. Yellow marks are due to reduced chlorophyll in palisade cells, and white marks to reduced chlorophyll, as well as larger air spaces between palisade cells and detached upper epidermis. White and yellow marks are controlled by a gene in which seven alleles were identified which determine colour and position, white being dominant to yellow, and, in order of decreasing dominance, upper, central, and basal positions along the midrib. Another gene, independent of the one controlling yellow or white marks, controls both the production of a central purple mark and the purple borders around marks. A comparison is made between the genetic control of marks in M. truncatula and those reported for other Medicago and Trifolium species.

1905 ◽  
Vol 7 (2) ◽  
pp. 119-154 ◽  
Author(s):  
Harro Woltmann

(1) The cytotoxins are not specific. (2) The changes occurring after the injection of different cytotoxins are similar and do not vary in kind. (3) The changes do, however, vary in degree in the following order, the one having the most marked effect being placed first, etc.: (a) Hæmolymphotoxin, (b) Splenotoxin, (c) Lymphotoxin, (d) Endotheliotoxin, (e) Nephrotoxin, (f) Hepatotoxin. (4) Nephrotoxin causes the most specific change. (5) The hæmolymph glands play some important part in the production of eosinophiles. The hæmolytic action of hæmolymphotoxic serum is greater than that of other cytotoxic sera. (6) The histological changes which are observed in every case are secondary to the hæmolytic factor present in all cytotoxic sera.


Author(s):  
María Villanueva Fernández ◽  
Héctor García-Diego

Resumen: A partir de 1920 Le Corbusier comenzó a elaborar un cuerpo teórico sobre el diseño de objetos que iría difundiendo a través de sus escritos y conferencias. Libros como Vers une architecture, L´art décoratif d´aujourd´hui o Précisions sur un état présent de l'architecture et de l'urbanisme han constituído un rico legado de ideas e imágenes interrelacionadas que permiten analizar la propuesta del arquitecto desde el plano de la teoría. Sin embargo, el poder de sus postulados fue continuamente experimentado y corroborado por su obra en materia de mobiliario, hasta el punto de establecerse relaciones directas entre teoría y obra. Esta evolución conjunta proporciona una completa visión del concepto de mobiliario moderno desarrollado por Le Corbusier. Por tanto, esta investigación persigue, por un lado, sacar a la luz un verdadero cuerpo teórico de cuño 'corbuseriano' y específico del equipamiento moderno, haciendo especial mención a los postulados y dibujos originales del arquitecto y, por otro, comprobar la correspondencia real entre sus teorías y sus obras mediante el análisis de una escogida selección de obras del arquitecto pertenecientes al periodo de entreguerras, para, finalmente, ofrecer una caracterización 'corbuseriana' del mobiliario moderno. Abstract: From 1920 Le Corbusier began to develop a theoretical body on the objects design that went spreading through his writings and lectures. Books like Vers une architecture, L'art décoratif d'aujourd'hui or Précisions sur un état présent de l'architecture et de l'urbanisme have constituted a rich legacy of interlinked ideas and images to analyze the proposal of the architect from the level of theory. However, the power of its principles was continuously experienced and corroborated by his work in furniture, to the point of establishing direct relations between theory and work. This joint development provides a comprehensive overview of modern furniture concept developed by Le Corbusier. Therefore, this research aims on the one hand, to expose a 'Corbusian' and specific theoretical body of modern equipment, with special reference to the principles and original drawings by the architect; and, secondly, to check the real correspondence between his theories and works by analyzing a choice selection of works by the architect belonging to the interwar period, to finally offer a 'Corbusian' characterization of modern furniture.Palabras clave: Teoría; mobiliario; moderno; escritos. Keywords: Theory; furniture; modern; writings. DOI: http://dx.doi.org/10.4995/LC2015.2015.569 


2009 ◽  
Vol 26 (1) ◽  
pp. 70-85
Author(s):  
M. Ashraf Adeel

It is argued that religions seem to insist, paradoxically, on both exclusivity and diversity to inspire passionate commitment on the one hand and to allow for genuine choice of religion on the other. The argument is developed with special reference to Islam, with hints of similar strands of thought in Judaism and Christianity. The paradoxicality of this position of religions is similar to Kierkegaard’s interpretation of faith, as exhibited byAbraham in his sacrifice. Interpreting religions in this way provides us with a better context for understanding the exclusivism/pluralism debate.


1988 ◽  
Vol 152 (S1) ◽  
pp. 21-28 ◽  
Author(s):  
J. E. Cooper

The discussion here is largely concerned with the purposes and structure of classifications of clinical concepts, variously called diseases, illnesses, disorders and syndromes, which are the main reasons why patients go to see doctors. Multiaspect (or multiaxial) classification has deservedly come to the fore in recent years, and seems likely to increase in importance for purposes of education, communication and research in the near future, but it is mentioned only briefly in the following discussion. The main focus of attention for the moment is the clinical descriptions of disorders; this is, of course, usually the first aspect in a multiaspect system, and the one around which the other aspects tend to be organised.


1921 ◽  
Vol 12 (1) ◽  
pp. 99-102
Author(s):  
F. W. Dry
Keyword(s):  

Caterpillars on flax in Kenya Colony are farm pests of the first rank. They belong to more than one species, but the one most commonly reared from material from the field is Phytometra (Plusia) orichalcea, F.; Heliothis obsoleta, F., is also met with.


2015 ◽  
Vol 112 (48) ◽  
pp. 14799-14804 ◽  
Author(s):  
Aida Gómez-Robles ◽  
William D. Hopkins ◽  
Steven J. Schapiro ◽  
Chet C. Sherwood

The study of hominin brain evolution has focused largely on the neocortical expansion and reorganization undergone by humans as inferred from the endocranial fossil record. Comparisons of modern human brains with those of chimpanzees provide an additional line of evidence to define key neural traits that have emerged in human evolution and that underlie our unique behavioral specializations. In an attempt to identify fundamental developmental differences, we have estimated the genetic bases of brain size and cortical organization in chimpanzees and humans by studying phenotypic similarities between individuals with known kinship relationships. We show that, although heritability for brain size and cortical organization is high in chimpanzees, cerebral cortical anatomy is substantially less genetically heritable than brain size in humans, indicating greater plasticity and increased environmental influence on neurodevelopment in our species. This relaxed genetic control on cortical organization is especially marked in association areas and likely is related to underlying microstructural changes in neural circuitry. A major result of increased plasticity is that the development of neural circuits that underlie behavior is shaped by the environmental, social, and cultural context more intensively in humans than in other primate species, thus providing an anatomical basis for behavioral and cognitive evolution.


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