scholarly journals Attractiveness of volatiles from different body parts to the malaria mosquito Anopheles coluzzii is affected by deodorant compounds

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Niels O. Verhulst ◽  
Berhane T. Weldegergis ◽  
David Menger ◽  
Willem Takken
2019 ◽  
Vol 57 (3) ◽  
pp. 657-666 ◽  
Author(s):  
Victor S Mwingira ◽  
Jeroen Spitzen ◽  
Leonard E G Mboera ◽  
José L Torres-Estrada ◽  
Willem Takken

Abstract In the selection of oviposition sites female mosquitoes use various cues to assess site quality to optimize survival of progeny. The presence of conspecific larvae influences this process. Interactive effects of oviposition site selection were studied in the malaria mosquito Anopheles coluzzii Coetzee & Wilkerson in dual- and no-choice assays, by exposing single gravid mosquitoes to oviposition cups containing 1) larvae of different developmental stages, 2) larvae-conditioned water (LCW), and 3) cups where visual cues of conspecific larvae were absent. Early-stage conspecific larvae had a positive effect on the oviposition response. By contrast, late stages of conspecific larvae had a negative effect. Oviposition choice was dependent on larval density. Moreover, in oviposition cups where larvae were hidden from view, late-stage larvae had a significant negative effect on oviposition suggesting the involvement of olfactory cues. LCW had no effect on oviposition response, indicating involvement of chemicals produced by larvae in vivo. It is concluded that the presence of larvae in a breeding site affects the oviposition response depending on the development stage of the larvae. These responses appear to be mediated by olfactory cues emitted by the larval habitat containing live larvae, resulting in the enhanced reproductive fitness of the females.


2020 ◽  
Author(s):  
Melina Campos ◽  
Mark Hanemaaijer ◽  
Hans Gripkey ◽  
Travis Collier ◽  
Yoosook Lee ◽  
...  

2020 ◽  
Vol 118 ◽  
pp. 103288
Author(s):  
Faye H. Rodgers ◽  
Julia A. Cai ◽  
Andre N. Pitaluga ◽  
Dominique Mengin-Lecreulx ◽  
Mathilde Gendrin ◽  
...  

2018 ◽  
Vol 11 (1) ◽  
Author(s):  
Bradley J. Main ◽  
Amanda Everitt ◽  
Anthony J. Cornel ◽  
Fereydoun Hormozdiari ◽  
Gregory C. Lanzaro

2002 ◽  
Author(s):  
Trent A. Petrie ◽  
Margaret M. Tripp ◽  
Pejcharat Harvey

2017 ◽  
Vol 2 (3) ◽  

Melanoma is the most dangerous type of skin cancer in which mostly damaged unpaired DNA starts mutating abnormally and staged an unprecedented proliferation of epithelial skin to form a malignant tumor. In epidemics of skin, pigment-forming melanocytes of basal cells start depleting and form uneven black or brown moles. Melanoma can further spread all over the body parts and could become hard to detect. In USA Melanoma kills an estimated 10,130 people annually. This challenge can be succumbed by using the certain anti-cancer drug. In this study design, cyclophosphamide were used as a model drug. But it has own limitation like mild to moderate use may cause severe cytopenia, hemorrhagic cystitis, neutropenia, alopecia and GI disturbance. This is a promising challenge, which is caused due to the increasing in plasma drug concentration above therapeutic level and due to no rate limiting steps involved in formulation design. In this study, we tried to modify drug release up to threefold and extended the release of drug by preparing and designing niosome based topical gel. In the presence of Dichloromethane, Span60 and cholesterol, the initial niosomes were prepared using vacuum evaporator. The optimum percentage drug entrapment efficacy, zeta potential, particle size was found to be 72.16%, 6.19mV, 1.67µm.Prepared niosomes were further characterized using TEM analyzer. The optimum batch of niosomes was selected and incorporated into topical gel preparation. Cold inversion method and Poloxamer -188 and HPMC as core polymers, were used to prepare cyclophosphamide niosome based topical gel. The formula was designed using Design expert 7.0.0 software and Box-Behnken Design model was selected. Almost all the evaluation parameters were studied and reported. The MTT shows good % cell growth inhibition by prepared niosome based gel against of A375 cell line. The drug release was extended up to 20th hours. Further as per ICH Q1A (R2), guideline 6 month stability studies were performed. The results were satisfactory and indicating a good formulation approach design was achieved for Melanoma treatment.


2019 ◽  
Vol 3 (2) ◽  
pp. 109-122
Author(s):  
Cita Mustika Kusumah

This research aims to describe and give an overview of the use of sexual euphemism in pop and hip hop lyric songs to avoid taboo words which are usually unfreely to mention in public. The researcher uses qualitative method and descriptive method to analyze the data. The researcher uses forty songs consist of twenty pop songs and twenty hip hop songs to be analysed. From forty songs, the researcher finds ninety seven data. Researcher believes the data are found to contain sexual euphemism in the utterance that included in pragmatic study.Researcher describes and analyzes every single of data that are included the theory of Allan and Buridge (1991). From the research data, the researcher found that there is a differential usage of sexual euphemism in pop and hip hop which is sexual euphemism in sexual activity appears more frequently in pop songs and sexual euphemism in sexual body parts appears more frequently in hip hop songs. Both pop and hip hop songs use representative speech act more frequently than directive speech act. Euphemism was used in the lyrics to avoid words that are considered taboo in some communities.Keywords: speech act, sexual euphemismINTRODUCTIONIn


Somatechnics ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 88-103 ◽  
Author(s):  
Kalindi Vora

This paper provides an analysis of how cultural notions of the body and kinship conveyed through Western medical technologies and practices in Assisted Reproductive Technologies (ART) bring together India's colonial history and its economic development through outsourcing, globalisation and instrumentalised notions of the reproductive body in transnational commercial surrogacy. Essential to this industry is the concept of the disembodied uterus that has arisen in scientific and medical practice, which allows for the logic of the ‘gestational carrier’ as a functional role in ART practices, and therefore in transnational medical fertility travel to India. Highlighting the instrumentalisation of the uterus as an alienable component of a body and subject – and therefore of women's bodies in surrogacy – helps elucidate some of the material and political stakes that accompany the growth of the fertility travel industry in India, where histories of privilege and difference converge. I conclude that the metaphors we use to structure our understanding of bodies and body parts impact how we imagine appropriate roles for people and their bodies in ways that are still deeply entangled with imperial histories of science, and these histories shape the contemporary disparities found in access to medical and legal protections among participants in transnational surrogacy arrangements.


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