Search results for "Leech"
showing 3 items of 13 documents
Le strategie di scuse, uno studio pragmatico cross-culturale fra l’arabo libico e l’italiano
2021
La mia ricerca si colloca nell’ambito della pragmatica contrastiva, un campo di ricerca il cui obiettivo è quello di mettere a confronto due lingue differenti in relazione alle strutture e alle forme che due lingue diverse usano nel medesimo contesto d’uso; le differenze fra queste realizzazioni linguistiche sono spiegate attraverso differenze di tipo culturale. I partecipanti allo studio rappresentano due gruppi di parlanti: nativi italiani e nativi arabi. La raccolta dei dati è stata effettuata mediante la compilazione di un sondaggio scritto di tipo DCT (Discourse Completion Test). In concreto, sono state elaborate 10 situazioni comunicative atte a generare nel parlante la sollecitazione…
4-Aminopyridine (4AP) Enhances Acetylcholine Output from the Rat Cerebral Cortex in vivo
1982
Publisher Summary This chapter discusses a study to analyze the effect of 4-aminopyridine (4AP) administration on cortical acetylcholine (ACh) output. The study was done on adult male Wistar rats under urethane or pentobarbital anesthesia. A small Perspex cylinder filled with eserinized Ringer solution was applied on the exposed cerebral cortex. The solution in the collecting cylinder was removed every 10 min and its ACh content was determined by bioassay on the dorsal muscle of the leech. In urethane anaesthetized rats, the control ACh output was 0.98 ± 0.16 ng/min/cm2 and the administration of 4AP (3 mg/kg i.p.) was followed by a rapid increase in ACh output lasting at least 40 min. The i…
Solving a Bloody Mess: B-Vitamin Independent Metabolic Convergence among Gammaproteobacterial Obligate Endosymbionts from Blood-Feeding Arthropods an…
2015
Endosymbiosis is a common phenomenon in nature, especially between bacteria and insects, whose typically unbalanced diets are usually complemented by their obligate endosymbionts. While much interest and focus has been directed toward phloem-feeders like aphids and mealybugs, blood-feeders such as the Lone star tick (Amblyomma americanum), Glossina flies, and the human body louse (Pediculus humanus corporis) depend on obligate endosymbionts which complement their B-vitamin-deficient diets, and thus are required for growth and survival. Glossiphoniid leeches have also been found to harbor distinct endosymbionts housed in specialized organs. Here, we present the genome of the bacterial endosy…