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6篇 您的检索式:作者名="Vallesi"
    题名 作者 年代 出处 被引量
1Domain-independent neural underpinning of task-switching : an fMRI investigation 显示文摘Vallesi A Arbula S Capizzi M 2015Cortex2015,65,:1
2Top-down and bottom-up processes in the extrastriate cortex of cirrhotic patients: An ERP study显示文摘Sami Schiff Daniela Mapelli Antonino Vallesi Raffaele Orsato Angelo Gatta Carlo Umiltà Piero Amodio 2006Clinical Neurophysiology2006,,8:1
3Timing and characteristics of nuclear events during conjugation and genomic exclusion in Paramecium multimicronucleatum显示文摘Ciliated protists are ideal material for studying the origin and evolution of sex,because of their nuclear dimorphism(containing both germline micronucleus and somatic macronucleus in the same cytoplasm),special sexual processes(conjugation and autogamy),and high diversity of mating-type systems.However,the study of sexual process is limited to only a few species,due to the difficulties in inducing or observing conjugation.In the present study,we investigate the conjugation process in Paramecium multimicronucleatum:(1)of the three prezygotic divisions,all micronuclei undergo the first two divisions(meiosis I,II),while a variable number of nuclei undergo the third division(mitosis);(2)the synkaryon divides three times after fertilization,giving rise to eight products that differentiate into four macronuclear anlagen and four micronuclei;(3)cells restore the vegetative stage after two successive cell fissions during which the macronuclear anlagen are distributed into daughter cells without division,while micronuclei divide mitotically;(4)the parental macronucleus begins to fragment following the first meiotic division and finally degenerates completely;(5)the entire process takes about 110 h,of which about 85 h are required for macronuclear development.In addition,we describe for the first time the process of genomic exclusion occurring between amicronucleate and micronucleate cells of P.multimicronucleatum,during which the micronucleate cell contributes a pronucleus to the amicronucleate cell,resulting in both exconjugants being homozygotes.These results provide new insights into the diversity of sexual processes and lay an important cytological basis for future in-depth studies of mating systems in ciliates.Xue Zhang Xiaoteng Lu Yong Chi Yaohan Jiang Chundi Wang Saleh AAl‑Farraj Adriana Vallesi Feng Gao 2022Marine Life Science & Technology2022,4,3:1
4The neural basis of temporal preparation : Insights from brain tumor patients 显示文摘Vallesi A Mussoni A Mondanib M 2007Neuropsychologia2007,45,12:1
5Nuclear events during conjugation in the poorly studied model ciliate Paramecium jenningsi显示文摘Ciliated protists are highly differentiated unicellular eukaryotes that possess special sexual processes(conjugation and autogamy)that rely on their unique nuclear dimorphism,i.e.,the presence of both a germline micronucleus(MIC)and a somatic macronucleus(MAC)in a single cell.The sexual processes show a high diversity in different ciliates.To better understand the differentiation and evolution of sexual processes in closely related species,we investigated the nuclear events during conjugation in Paramecium jenningsi strain GZ,a poorly studied close relative of the well-known P.aurelia complex.The main results include:(1)the conjugation process takes about 48 h,including three prezygotic divisions(meiosis I,II,and mitosis)and three postzygotic divisions;(2)the MICs are dominated by the“parachute”phase at the prophase of meiosis I;(3)after meiosis II,a variable number of nuclei undergo the third prezygotic division,and the two products near the paroral cone become the genetically identical migratory and stationary pronuclei;(4)the synkaryon divides three times to form the MIC and the MAC anlagen,but only one nuclear product of the first postzygotic division completes the next two divisions;and(5)an extra cell division is required to complete the last step of conjugation,during which two MIC anlagen undergo mitotic division while two MAC anlagen are distributed between the daughter cells without division.The comparison of the nuclear events during conjugation in representatives of the class Oligohymenophorea reveals that usually there are three prezygotic divisions and a variable number of postzygotic divisions.However,the number of selected and differentiated nuclei after each division differs among species.This study provided a new model ciliate for further investigations of nuclear selection and differentiation as well as nuclear morphology during meiosis.Xue Zhang Ruitao Gong Yaohan Jiang Xiaoteng Lu Chenyin Wu Lihan Wang Hongwei Ma Zhengxiang Zhang Weibo Song Khaled A.S.Al-Rasheid Adriana Vallesi Feng Gao 2023Water Biology and Security2023,2,4:0
6Usefulness and Effectiveness of Related Party Transactions (RPTs) Disclosure: Empirical Evidence From Italy显示文摘Amedeo De Cesari Oscar Domenichelli Martina Vallesi 2014Journal of Modern Accounting and Auditing2014,10,11:0
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