GENETICS OF FACTORS AFFECTING THE LIFE HISTORY OF DROSOPHILA MELANOGASTER. I. FEMALE PRODUCTIVITY

Genetics ◽  
1985 ◽  
Vol 110 (3) ◽  
pp. 453-464
Author(s):  
Yuchiro Hiraizumi
Keyword(s):  
Drosophila Melanogaster ◽  
Reproductive Performance ◽  
Wild Population ◽  
The Other ◽  
Isofemale Line ◽  
Isofemale Lines ◽  
Factors Affecting ◽  
Young Females ◽  
Total Progeny ◽  
History Of

ABSTRACT Starting from four basic strains of Drosophila melanogaster, two laboratory strains (cn bw, Tokyo) and two isofemale lines (B-102, B-103) originated from a wild population in Texas, we constructed by repeated backcrosses through females for 20 or more generations a total of 16 strains of all possible combinations between the chromosome sets and cytoplasmic classes. Females from these 16 synthesized strains were then examined for their reproductive performance during their entire life span.—The chromosome set from the cn bw strain was found to associate with the highest female productivity when the age of females was very young, but these females ceased their reproduction and died relatively earlier, resulting in a smaller number of total progeny. The B-102 and B-103 chromosome sets, on the other hand, were associated with the lowest productivity when the females were young, but they lived and continued reproduction longer, resulting in a larger number of total progeny. The Tokyo chromosome set was associated with female productivity intermediate between the other two groups.—Cytoplasmic factors were found to affect the productivity of young females, with the cytoplasm from the cn bw strain associated with the highest productivity. Longevity was not cytoplasmically affected.—There was a clear interaction in female productivity between the Tokyo chromosome set and the cytoplasm from the Texas isofemale lines; the lifetime female productivity, as well as longevity, associated with the Tokyo chromosome set was found to increase considerably when it was substituted into the cytoplasm of the Texas isofemale line. This chromosome-cytoplasm interaction appeared to be independent of the two systems of hybrid dysgenesis.

Factors Affecting the Development of Academic Law Libraries in Nigeria

1996 ◽  
Vol 24 (2) ◽  
pp. 148-160
Author(s):  
I.E. Aguolu
Keyword(s):  
Foreign Exchange ◽  
Political Instability ◽  
The Other ◽  
Educational Institutions ◽  
Local Production ◽  
Factors Affecting ◽  
Other Hand ◽  
Legal Texts ◽  
Typical History ◽  
History Of

This study highlights some factors that have influenced the development of academic law libraries in Nigeria. Inadequacy of local production of legal texts, exorbitant cost of the available texts, and scarcity of foreign exchange, were identified as major constraints. On the other hand, factors which have promoted the development of academic law libraries in Nigeria include the existence and use of published standards for law libraries, accreditation requirement for law faculties, book gifts and loans. Moreover, Nigeria's typical history of political instability and proliferation of states has paradoxically not been a hindrance but a catalyst for the emergence of numerous social and educational institutions including universities and academic law libraries.

Breed and environmental factors affecting the reconception of indigenous beef cows in Botswana

1982 ◽  
Vol 35 (3) ◽  
pp. 413-420
Author(s):  
N. G. Buck ◽  
D. Light
Keyword(s):  
Environmental Factors ◽  
Environmental Effects ◽  
Reproductive Performance ◽  
Beef Cows ◽  
The Other ◽  
Factors Affecting ◽  
Lactating Cows ◽  
Management Interventions ◽  
Lower Fertility ◽  
Main Effects

ABSTRACTThe breeding records of 2710 lactating cows, of the Africander (1208), Tswana (542) and Tuli (960) breeds, were analysed to examine the effects of breed and environment on reconception. The reconception rate of Africander cows (0·56) was significantly lower than that of Tswana and Tuli cows (0·80 and 0·81 respectively) (P<0·01). The environmental effects of ranch, calving year, calving period and age/parity all had significant effects on reconception (P<0·01). Interactions between breed and the other main effects were all significant.The Africander is considered to be a breed of lower fertility than the other two Sanga breeds, the Tswana and Tuli, in Botswana. The results are discussed with respect to determining management interventions to improve cow reproductive performance.

scholarly journals Estimation of the Allele Number in a Natural Population by the Method of Isofemale Lines

Genetics ◽  
1987 ◽  
Vol 117 (4) ◽  
pp. 795-801
Author(s):  
P Capy ◽  
J Rouault
Keyword(s):  
Population Structure ◽  
Natural Population ◽  
Sequential Sampling ◽  
Sampling Procedure ◽  
The Other ◽  
Isofemale Line ◽  
Isofemale Lines ◽  
Allele Number ◽  
Unknown Structure ◽  
The One

ABSTRACT The number of alleles present in a natural population of unknown structure is estimated using a sequential sampling procedure applied to isofemale lines. Two questions are raised: how many individuals per isofemale line must be assayed and how many isofemale lines must be sampled to get an adequate sample to estimate the number of alleles, at a given risk, of the natural population? On the one hand, we show that when wild females are inseminated once, only two individuals per line are required. On the other hand, the number of isofemale lines that must be sampled depends on the risk chosen of losing an allele, on the number of alleles present in the population and on their drawing probabilities. When the population structure is known, an accurate answer can be provided. For an unknown population structure, one general sequential sampling previously described by J. Rouault and P. Capy is proposed to estimate the number of alleles in the population from data on isofemale lines.

scholarly journals "Machina ludens". Rzeczywista i wyobrażona historia komputerów szachowych

Adeptus ◽  
2021 ◽  
Author(s):  
Piotr F. Piekutowski
Keyword(s):  
Artificial Intelligence ◽  
Drosophila Melanogaster ◽  
Computer Science ◽  
Paradigm Shift ◽  
Film History ◽  
The Other ◽  
The Real ◽  
Area Of Interest ◽  
History Of ◽  
Special Case

Machina Ludens: The Real and Imagined History of Chess ComputersThe essay offers a reading of the place of non-human machines in the game discourse, focusing on computer chess’s real as well as literary and film history. Chess, as the Drosophila melanogaster of artificial intelligence, a special case facilitating the study of the entire field, allows for going beyond the primary area of interest – computer science – and entering the realm of the text, where new languages of storytelling and new contexts present themselves. The paper discusses a multifaceted, posthumanist analysis of the game as a medium of non-anthropocentric and empowering narratives of the Other. It also sheds new light on the ongoing paradigm shift in human categories and human-technology relations. Machina ludens. Rzeczywista i wyobrażona historia komputerów szachowychCelem artykułu jest próba odczytania sposobu funkcjonowania nie-ludzkich maszyn w dyskursie growym, skupiona na rzeczywistej i literacko-filmowej historii komputerów szachowych. Szachy i sztuczna inteligencja wchodzą w przestrzeń tekstu, przekraczają pierwotny obszar zainteresowań – informatykę – i dzięki innym językom opowieści otwierają się na nowe konteksty. W tekście przedstawiono wieloaspektową, posthumanistyczną analizę gry jako medium nieantropocentrycznych i upodmiotawiających narracji Innego. Historia szachów i komputerów szachowych oraz ich tekstowe przedstawienia stanowią egzemplifikację zmian ludzkich kategorii oraz relacji człowiek-technologia.

scholarly journals Avan-zâde Mehmed Süleyman and the first physical anthropology studies in OttomansAvan-zâde Mehmed Süleyman ve Osmanlılarda ilk fizik antropoloji çalışmaları

2016 ◽  
Vol 13 (3) ◽  
pp. 4020
Author(s):  
İsmail Dinçarslan ◽  
Erksin Güleç
Keyword(s):  
Literature Review ◽  
History Of Medicine ◽  
Growth And Development ◽  
Physical Anthropology ◽  
The Other ◽  
Physical Growth ◽  
Factors Affecting ◽  
Weight Growth ◽  
History Of ◽  
The Subject

The first known study on the physical growth of children in Ottomans was “Şâkirdlerimizin nemâ-yı bedenîsi” by Nafi Atuf (Kansu) in 1917 which was on the students living in Bursa. As a result of literature review, we reached the book named “Almanlar Gibi Kuvvetli ve Uzun Boylu Nasıl Olmalı?” written by Avan-zâde Mehmed Süleyman in 1335/1916 in Ottoman Turkish and the transliteration of the book was done by us. With the scope of this study, the content of the book and the data on the author were simplified in accordance with today’s Turkish by keeping to the original. In addition, the book was evaluated with regards to physical anthropology, the history of medicine and sociology. In the book which is one of the first pre-republican physical anthropological studies, the author deals with the factors affecting stature, weight, growth and development in order to raise healthier generations. On the other hand, by the subject of the study (to raise healthier generations) the approache of the author related to race and eugenics was evaluated in his period. ÖzetOsmanlılarda çocukların fiziksel büyümesi üzerine literatürde bilinen ilk çalışma Nafi Atuf (Kansu) tarafından 1917 yılında Bursa’da yaşayan öğrenciler üzerine yapılan, Şâkirdlerimizin nemâ-yı bedenîsi adlı çalışmadır. Bununla birlikte tarafımızdan yapılan literatür taramasında, Avan-zâde Mehmed Süleyman’ın 1335/1916 yılında Osmanlıca olarak kaleme aldığı Almanlar Gibi Kuvvetli ve Uzun Boylu Nasıl Olmalı? adlı kitabına ulaşılmış ve eserin transliterasyonu gerçekleştirilmiştir. Bu çalışma kapsamında eserin içeriği ve yazarı hakkında bilgiler, eserin aslına bağlı kalınarak günümüz Türkçesine uygun biçimde sadeleştirilmiş ve fizik antropoloji, tıp ve toplumbilim tarihi açısından değerlendirilmiştir. Cumhuriyet öncesi ilk fizik antropoloji çalışmalarından biri olma özelliğini taşıyan eserde, yazar genel hatlarıyla, daha sağlıklı nesillerin yetiştirilebilmesi için boy, kilo ve büyüme-gelişmeyi etkileyen faktörleri ele almıştır. Beslenme, geçim tarzı, toplumun fiziki ve kültürel çevreye uyarlanması gibi konuları içeren eser, toplum ve çocuk sağlığı konularına ilişkin bilgilerde içermektedir. Diğer taraftan çalışmanın konusu gereği (daha sağlıklı nesiller yetiştirmek) çalışmacının ırk, ırk ıslahı ve kontrolüne (öjeni) ilişkin yaklaşımı kendi dönemi içerisinde değerlendirilmiştir.

scholarly journals FACTORS AFFECTING RECOGNITION AND DISJUNCTION OF CHROMOSOMES AT DISTRIBUTIVE PAIRING IN FEMALE DROSOPHILA MELANOGASTER. II. THE EFFECT OF A SECOND ARM

Genetics ◽  
1972 ◽  
Vol 70 (4) ◽  
pp. 583-593
Author(s):  
Charleen M Moore ◽  
Rhoda F Grell
Keyword(s):  
Drosophila Melanogaster ◽  
Size Ratio ◽  
The Other ◽  
Competitive Situation ◽  
X Chromosomes ◽  
Factors Affecting

ABSTRACT The behavior of heterozygously inverted X chromosomes that were members of the distributive pool at least 70% of the time was studied when the other pool members were either two free 4's or one compound 4. The X's were structurally modified by additions or deletions of heterochromatin, so that the two homologues differed in both size and configuration or in size alone. In the noncompetitive situation, with two free 4's, recognition between the X's remained high despite the modifications, and primary X nondisjunction was low. In the competitive situation, with the compound 4, distributive nondisjunction of the X's increased approximately two orders of magnitude, and trivalent formation was indicated. Disjunction from the trivalent varied with X size and configuration. When both X's were acrocentric, the smaller X directed the larger X and the very small (see PDF) to the same pole; when the larger X carried a second arm, it assumed the directing role; when the size ratio of the smaller, one-armed X to the larger, two-armed X became less than ∼5/9, the smaller X again directed the other two.

scholarly journals THE CROSSVEINLESS POLYGENES IN AN IOWA POPULATION

Genetics ◽  
1973 ◽  
Vol 75 (1) ◽  
pp. 169-179
Author(s):  
Bradford J Boyer ◽  
Deborah L Parris ◽  
Roger Milkman
Keyword(s):  
Drosophila Melanogaster ◽  
Natural Population ◽  
Isofemale Line ◽  
Isofemale Lines ◽  
True Breeding

ABSTRACT A natural population of Drosophila melanogaster was tested for the presence of crossveinless (cve) alleles over the course of a summer. Approximately 8% of the wild-caught females tested carried enough cve alleles to produce true-breeding crossveinless lines. In some cases, different isofemale lines produced identical cve strains. Also, differences were sometimes observed among independently selected cve sublines of a given isofemale line.—The cv-2 allele was found to occur with a frequency of about 1% to 2%.

Theodor W. Adorno

2018 ◽  
Author(s):  
Colby Dickinson
Keyword(s):  
The Other ◽  
History Of Thought ◽  
History Of ◽  
The One

In his somewhat controversial book Remnants of Auschwitz, Agamben makes brief reference to Theodor Adorno’s apparently contradictory remarks on perceptions of death post-Auschwitz, positions that Adorno had taken concerning Nazi genocidal actions that had seemed also to reflect something horribly errant in the history of thought itself. There was within such murderous acts, he had claimed, a particular degradation of death itself, a perpetration of our humanity bound in some way to affect our perception of reason itself. The contradictions regarding Auschwitz that Agamben senses to be latent within Adorno’s remarks involve the intuition ‘on the one hand, of having realized the unconditional triumph of death against life; on the other, of having degraded and debased death. Neither of these charges – perhaps like every charge, which is always a genuinely legal gesture – succeed in exhausting Auschwitz’s offense, in defining its case in point’ (RA 81). And this is the stance that Agamben wishes to hammer home quite emphatically vis-à-vis Adorno’s limitations, ones that, I would only add, seem to linger within Agamben’s own formulations in ways that he has still not come to reckon with entirely: ‘This oscillation’, he affirms, ‘betrays reason’s incapacity to identify the specific crime of Auschwitz with certainty’ (RA 81).

The World after the End of the World

2017 ◽  
Vol 39 (2) ◽  
pp. 265-276 ◽  
Author(s):  
Kas Saghafi
Keyword(s):  
The Other ◽  
The World ◽  
History Of ◽  
The Absolute ◽  
End Of The World

In several late texts, Derrida meditated on Paul Celan's poem ‘Grosse, Glühende Wölbung’, in which the departure of the world is announced. Delving into the ‘origin’ and ‘history’ of the ‘conception’ of the world, this paper suggests that, for Derrida, the end of the world is determined by and from death—the death of the other. The death of the other marks, each and every time, the absolute end of the world.

Med. Dr. Adalbert Wraný (1836–1902) – doctor of medicine, mineral collector and donor to the National Museum in Prague

2019 ◽  
Vol 188 (1) ◽  
pp. 95-146
Author(s):  
Martin Bohatý ◽  
Dalibor Velebil
Keyword(s):  
Natural Science ◽  
Natural Sciences ◽  
The Other ◽  
National Museum ◽  
Industrial Chemistry ◽  
Pediatric Pathology ◽  
Geological Institute ◽  
History Of ◽  
Precious Stones

Adalbert Wraný (*1836, †1902) was a doctor of medicine, with his primary specialization in pediatric pathology, and was also one of the founders of microscopic and chemical diagnostics. He was interested in natural sciences, chemistry, botany, paleontology and above all mineralogy. He wrote two books, one on the development of mineralogical research in Bohemia (1896), and the other on the history of industrial chemistry in Bohemia (1902). Wraný also assembled several natural science collections. During his lifetime, he gave to the National Museum large collections of rocks, a collection of cut precious stones and his library. He donated a collection of fossils to the Geological Institute of the Czech University (now Charles University). He was an inspector of the mineralogical collection of the National Museum. After his death, he bequeathed to the National Museum his collection of minerals and the rest of the gemstone collection. He donated paintings to the Prague City Museum, and other property to the Klar Institute of the Blind in Prague. The National Museum’s collection currently contains 4 325 samples of minerals, as well as 21 meteorites and several hundred cut precious stones from Wraný’s collection.

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