scholarly journals Meiotic Studies of a Human Male Carrier of the Common Translocation, t(11;22), Suggests Postzygotic Selection rather than Preferential 3:1 MI Segregation as the Cause of Liveborn Offspring with an Unbalanced Translocation

2000 ◽  
Vol 67 (3) ◽  
pp. 601-609 ◽  
Author(s):  
Susan J. Armstrong ◽  
Alastair S.H. Goldman ◽  
Robert M. Speed ◽  
Maj A. Hultén
Keyword(s):  
Unbalanced Translocation ◽  
Human Male ◽  
The Common ◽  
Male Carrier

Synaptonemal complex analysis in a human male carrier of a 4;6 translocation: heterosynapsis without previous homosynapsis

1991 ◽  
Vol 86 (3) ◽  
pp. 279-282 ◽  
Author(s):  
A. de Perdigo ◽  
O. Gabriel-Robez ◽  
C. Ratoinponirina ◽  
Y. Rumpler
Keyword(s):  
Synaptonemal Complex ◽  
Complex Analysis ◽  
Human Male ◽  
Synaptonemal Complex Analysis ◽  
Male Carrier

Supernumerary chromosomes and spermatogenesis in a human male carrier

1994 ◽  
Vol 94 (1) ◽  
pp. 74-76 ◽  
Author(s):  
H. Jaafar ◽  
O. Gabriel-Robez ◽  
F. Vignon ◽  
E. Flori ◽  
Y. Rumpler
Keyword(s):  
Supernumerary Chromosomes ◽  
Human Male ◽  
Male Carrier

V. Account of a monstrous lamb. In a letter from Mr. Anthony Carlisle, to the Right Honourable Sir Joseph Banks, Bart. K.B. P. R. S

1801 ◽  
Vol 91 ◽  
pp. 139-144
Keyword(s):  
Young Animal ◽  
Early Period ◽  
Natural Form ◽  
Human Male ◽  
Soft State ◽  
The Subject ◽  
The Common ◽  
Full Period ◽  
The Right ◽  
The Brain

Dear Sir, I am much indebted to you for the privilege of inspecting the monstrous-lamb sent by Dr. Pulteney of Blandford, whose laudable interest for the promotion of science, induced him to present it to you. The animal is a male, and apparently at the full period of gestation: its whole frame, excepting the head, is of the natural structure; the deviation in structure of this part, resembles none of the series of monsters which are usually met with among complicated animals. I have preserved the entire skin, in hopes of retaining the outward peculiarities of this creature. According to your suggestion, I took the opportunity, while the subject was in perfect preservation, to examine the brain and its connections: they seem to me very remarkable, and might have afforded matter, to an acute observer, of high interest in the science of physiology, had this monster been yeaned alive. Perhaps it may not be altogether unuseful, to record those internal deviations from the ordinary structure which this dissection presented; and the suggestions arising may possibly excite the attention of some future observer, who may be more happily circumstanced. The head is disproportionably small ; there being no other resemblance to the natural form than in the external ears, which are brought together by their insertions in the front part of the head : the apertures called by anatomists meatus externi, are wanting. Immediately between the insertion of the ears, an opening presents itself, lined with cuticle, and capable of receiving a bougie, the size of the human male urethra : this proved to be the common passage to both the œsophagus and the trachea. The outer surface of the head is regularly clothed with wool ; and there are no appearances of abrasion, or mechanical injury, having taken place at an early period of its formation ; such as are observable in monsters, and perhaps sometimes produced by the rubbing of the umbilical cord, or by the contiguity of the uterine contents, whilst the young animal is yet in a soft state. See Plate IX. Fig 1, and the references.

Catalogue reduction techniques

1978 ◽  
Vol 48 ◽  
pp. 389-390 ◽  
Author(s):  
Chr. de Vegt
Keyword(s):  
Adjustment Process ◽  
Proper Motions ◽  
Measuring Process ◽  
Aerial Photogrammetry ◽  
Reduction Techniques ◽  
Observational Technique ◽  
The Common ◽  
Astrometric Data

AbstractReduction techniques as applied to astrometric data material tend to split up traditionally into at least two different classes according to the observational technique used, namely transit circle observations and photographic observations. Although it is not realized fully in practice at present, the application of a blockadjustment technique for all kind of catalogue reductions is suggested. The term blockadjustment shall denote in this context the common adjustment of the principal unknowns which are the positions, proper motions and certain reduction parameters modelling the systematic properties of the observational process. Especially for old epoch catalogue data we frequently meet the situation that no independent detailed information on the telescope properties and other instrumental parameters, describing for example the measuring process, is available from special calibration observations or measurements; therefore the adjustment process should be highly self-calibrating, that means: all necessary information has to be extracted from the catalogue data themselves. Successful applications of this concept have been made already in the field of aerial photogrammetry.

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

Sign in / Sign up

Export Citation Format

Share Document