Search results for "TSH"

Female-released sex pheromones mediating courtship behavior in Lysiphlebus testaceipes males.

2013

Ethological aspects and chemical communication at close-range between the sexes of Lysiphlebus testaceipes Cresson (Hymenoptera: Braconidae) have been investigated through behavioral bioassays and chemical analysis. The attractiveness toward males of whole-body extracts of females and males in hexane and acetone was evaluated, adopting male fanning behavior as a key behavioral component. Also, the activity of polar and nonpolar fraction of female-body extract in hexane obtained using solid-phase extraction technique was investigated. In order to identify cuticular compounds, male and female whole-body extracts with hexane and acetone were analyzed by gas chromatography-mass spectrometry. Th…

Mechanical properties of Macadamia nutshell powder and PLA bio-composites

2016

AbstractA study on the mechanical properties of Macadamia nutshell powder/PLA bio-composites is presented in this paper. The effects of powder weight content, powder condition and processing methods are investigated with the aid of Design of Experiments. It is shown from the results that both the stiffness and strength are dependent on the weight content of Macadamia nutshell powders. The elastic modulus increases 9.8% when the Macadamia nutshell powder content is 40%. Both flexural and tensile strengths decrease with increasing Macadamia nutshell powder content. On average, when the Macadamia nutshell powder content is 40%, the decreases in the flexural and tensile strengths are 42 and 63%…

Courtship, Mating, and Sex Pheromones in the Mealworm Beetle (Tenebrio molitor)

2003

Publisher Summary This chapter focuses on courtship and mating in a coleopteran, the yellow mealworm beetle (Tenebrio molitor), observation and description of the behavior of (relatively) undisturbed animals, and the response of male Tenebrio molitor to the female sex attractant pheromone. Pheromones used in communication between members of the opposite sex in a mating context are collectively termed sex pheromones. In many insect species, detection of a sex pheromone is often sufficient to initiate the species-typical courtship and mating behaviors, although the release of these behaviors can be modified by visual, tactile, acoustic, or other types of stimuli. For example, upon detecting a…

Chemosensory cues allow male Tenebrio molitor beetles to assess the reproductive status of potential mates

2004

Males of many insect species, including beetles, choose their mates according to their reproductive status. However, the ways in which male beetles evaluate female reproductive status have received little attention. We tested the existence of male mate choice in the mealworm beetle, Tenebrio molitor, by observing mating and courtship behaviour of males given simultaneous access to pairs of females differing in their reproductive status: (1) mature versus immature; (2) virgin versus previously mated; (3) familiar (mated with the experimental male) versus unfamiliar (mated with a different male). Males courted and mated preferentially with mature and virgin females. To determine whether chemi…

Voila, a New Drosophila Courtship Variant that Affects the Nervous System: Behavioral, Neural, and Genetic Characterization

1998

InDrosophila melanogaster, a specificPGAL4transposon induces theVoila1genetic variant and produces multiple phenotypes. HomozygousVoila1/1flies rarely reach adulthood, whereas heterozygousVoila1/+adult males show strong bisexual behavior. Males with a single copy ofVoila1driving the feminizing transgeneUAS-transformershow very reduced sexual activity but no overall effect on their behavior.Voila1is specifically expressed in the nervous system. In the CNS, it is expressed mainly in the mushroom bodies and, to a lesser extent, in the antennal lobes. In the peripheral nervous system, GAL4 expression is almost entirely restricted to the gustatory sensilla. Using chromosomal deficiencies, the be…

Implication of an odorant-binding protein in precopulatory behaviour and interaction with the bacterial microbiota

2023

Chemoreception allows animals to detect nutritive food and avoid toxic compounds. Volatile and non-volatile chemical compounds, which are detected by olfactory and gustatory sensory organs, can trigger feeding and reproductive behaviours in animals such as Drosophila melanogaster. Inside chemosensory organs, perireceptor proteins like odorant-binding proteins (OBPs) serve to transport odorant and tastant molecule to dedicated receptors. OBPs are not only involved in chemoreception but also in several other functions. A recent study revealed an interaction between insect microbiota and OBP expression while another one showed that microbes can promote nutrient harvesting on food. In our proje…

Stimulatory Thyrotropin Receptor Antibodies Are a Biomarker for Graves' Orbitopathy.

2021

Identification of organic compounds in fictile unguentaria from two Sicilian necropolis of Greek age (5th century, b.c.) by GC-MS analysis.

2007

A study to obtain more knowledge on funeral set in Greek age, (5th Century, b.C.) was carried out on thirteen ancient unguentaria, small vessels used as containers of balms or ointments, founded in two different Sicilian necropolis: Adranon and Hymera. Every find was subjected to three extractions by increasing polarity solvents. All crude extracts, unsaponifiables and methyl esters of saponifiable fraction were analysed by GC-MS. Analysis showed difference between two groups of finds: the unguentaria from Adranon show abundant traces of lipids used in balm making, while those from Hymera resulted empty and buried for ritual purpose. Even if in the two towns, flourished in the same period, …

Heterogeneity of Stem Cells in the Thyroid

2019

Identification of thyroid stem cells in the past few years has made important contributions to our understanding of the cellular and molecular mechanisms that induce tissue regeneration and repair. Embryonic stem (ES) cells and induced-pluripotent stem cells have been used to establish reliable protocols to obtain mature thyrocytes and functional follicles for the treatment of thyroid diseases in mice. In addition, the discovery of resident thyroid progenitor cells, along with other sources of stem cells, has defined in detail the mechanisms responsible for tissue repair upon moderate or severe organ injury.In this chapter, we highlight in detail the current state of research on thyroid ste…

Sweatshop - rzeczywistość XXI wieku?

2008

W polskojęzycznej literaturze przedmiotu z zakresu nauk o organizacji i zarządzaniu nie porusza się problematyki dotyczącej sweatshopów. Dzieje się tak mimo rosnącej liczby tego typu organizacji, a więc systemów społeczno-technicznych, w których łamane są międzynarodowe standardy pracy, prawa człowieka i naruszana jest jego godność. W artykule podjęto kilka kluczowych kwestii dotyczących sweatshopów. Po pierwsze, omówiono właściwości tego typu organizacji. Po drugie, krótko scharakteryzowano międzynarodowy ruch walczący ze sweatshopami. Po trzecie, zaprezentowano sposoby ograniczania działalności tych przedsiębiorstw. Po czwarte, podjęto refleksję nad przyczynami obecności swaeatshopów w XX…