scholarly journals Hormonal Control of the Phase Polyphenism of the Desert Locust: A Review of Current Understanding

2012 ◽  
Vol 6 (1) ◽  
pp. 22-41 ◽  
Author(s):  
Amer I. Tawfik

The gregarious male of the desert locust shows a characteristic colour change during adult life; it is light brown and pink when immature, and bright yellow when mature. A mature, yellow male is able to accelerate the maturation process of young locusts by secreting a volatile substance which is produced in the epidermis and transmitted to the recipients by olfaction through the antennae and by contact over the body surface. The presence of this lipophilic substance is indicated by a vibration reaction, in which antennae, palpi and hind femora take part (Loher 1959). The volatile material can be extracted and preserved in oil and fat solvents. Extirpation and implantation of the corpora allata have demonstrated that in the male these endocrine glands are in control of sexual maturation and some associated processes, such as the production of the epidermal secretory substance, the colour change, the development of the accessory glands and the acceleration of maturation which results from wounding. The possibilities of combined action between the corpora allata and the epidermal secretory substance are discussed.


2019 ◽  
Vol 40 (2) ◽  
pp. 92-103 ◽  
Author(s):  
Janko Međedović ◽  
Goran Knežević

Abstract. Earlier research suggested that militant extremists could have certain aspects of psychopathic and psychotic characteristics. Relying on these studies, we investigated whether the Militant Extremist Mind-Set (MEM) could be explained by psychopathy, sadism, and Disintegration (psychosis proneness), as subclinical manifestations of amoral, antisocial, and psychotic-like traits. In Study 1 (306 undergraduate students), it was shown that sadistic and psychopathic tendencies were related to Proviolence (advocating violence as a means for achieving a goal); psychopathic and disintegrative tendencies were associated to the Vile World (belief in a world as a corrupted and vile place), while Disintegration was the best predictor of Divine Power (relying on supernatural forces as a rationale for extremist acts). In Study 2 (147 male convicts), these relations were largely replicated and broadened by including implicit emotional associations to violence in the study design. Thus, while Proviolence was found to be related to a weakened negative emotional reaction to violent pictures, Vile World was found to be associated with stronger negative emotions as a response to violence. Furthermore, Proviolence was the only MEM factor clearly differentiating the sample of convicts from male students who participated in Study 1. Results help extend current understanding about personal characteristics related to militant extremism.


2020 ◽  
Vol 24 (2) ◽  
pp. 232-250
Author(s):  
Stephanie Dropuljic

This article examines the role of women in raising criminal actions of homicide before the central criminal court, in early modern Scotland. In doing so, it highlights the two main forms of standing women held; pursing an action for homicide alone and as part of a wider group of kin and family. The evidence presented therein challenges our current understanding of the role of women in the pursuit of crime and contributes to an under-researched area of Scots criminal legal history, gender and the law.


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