scholarly journals Author response: A biological switching valve evolved in the female of a sex-role reversed cave insect to receive multiple seminal packages

2018 ◽  
Author(s):  
Kazunori Yoshizawa ◽  
Yoshitaka Kamimura ◽  
Charles Lienhard ◽  
Rodrigo L Ferreira ◽  
Alexander Blanke
eLife ◽  
2018 ◽  
Vol 7 ◽  
Author(s):  
Kazunori Yoshizawa ◽  
Yoshitaka Kamimura ◽  
Charles Lienhard ◽  
Rodrigo L Ferreira ◽  
Alexander Blanke

We report a functional switching valve within the female genitalia of the Brazilian cave insect Neotrogla. The valve complex is composed of two plate-like sclerites, a closure element, and in-and-outflow canals. Females have a penis-like intromittent organ to coercively anchor males and obtain voluminous semen. The semen is packed in a capsule, whose formation is initiated by seminal injection. It is not only used for fertilization but also consumed by the female as nutrition. The valve complex has two slots for insemination so that Neotrogla can continue mating while the first slot is occupied. In conjunction with the female penis, this switching valve is a morphological novelty enabling females to compete for seminal gifts in their nutrient-poor cave habitats through long copulation times and multiple seminal injections. The evolution of this switching valve may have been a prerequisite for the reversal of the intromittent organ in Neotrogla.


1983 ◽  
Vol 77 (6) ◽  
pp. 290-292 ◽  
Author(s):  
Judith M. Dixon

Women and disabled persons are both stigmatized by today's culture. In the general population, 58 percent of females are in the labor force; among blind or visually impaired persons, only 29 percent of females are employed or looking for work. One factor in this situation is the disincentive to work built into the disability benefit programs, although women are apt to receive a lower level of benefits than men. Other factors are employer attitudes toward blindness, and sex-role stereotyping. Major strategies for overcoming barriers include timely and accurate vocational preparation, assertiveness training, and support networks.


Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3640 ◽  
Author(s):  
Guijun Yang ◽  
Soo-Jin Park

We recently published an article “Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review” on Materials, and we are honored to receive a comment article from Jalouli et al. We will give a detailed explanation for the confusion of the mechanism of crystal nucleation and growth in the comment article.


1991 ◽  
Vol 26 (1) ◽  
pp. 56-74 ◽  
Author(s):  
Pippa Norris

IN RECENT YEARS QUESTIONS ABOUT THE EXTENT AND nature of gender differences in political participation have proved controversial. Within the literature we can identify three main perspectives. The traditional view, common in the 1950s and 1960s, was that women tended to be less involved and interested in most conventional forms of political life, whether in terms of elected office, party membership, interest group activity, or campaign work, and, to a lesser extent, in voting. The paucity of women in parliamentary elites therefore seemed consistent with their general lack of interest in political life. Debates about the causes of the participation gap tended to revolve around the relative importance of gender differences in structural life-styles (domestic constraints, socio-economic resources, and organizational affiliations) and/or political attitudes (sex role socialization, political efficacy and confidence). The traditional perspective may have become less popular but it continues to receive support from some recent studies.


2020 ◽  
Author(s):  
Gesa F. Dinges ◽  
Alexander S. Chockley ◽  
Till Bockemühl ◽  
Kei Ito ◽  
Alexander Blanke ◽  
...  

2020 ◽  
Author(s):  
Charles A. Williams ◽  
Kimberly E. Miller ◽  
Nisa P. Williams ◽  
Christine V. Portfors ◽  
David J. Perkel

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