scholarly journals Comparative Biology of Centrosomal Structures in Eukaryotes

Cells ◽  
2018 ◽  
Vol 7 (11) ◽  
pp. 202
Author(s):  
Ralph Gräf
Keyword(s):  
Eukaryotic Cell ◽  
Spindle Pole ◽  
Comparative Biology ◽  
Special Issue ◽  
Microtubule Organization ◽  
Spindle Pole Bodies ◽  
History Of ◽  
Relationship Of ◽  
The Relationship

The centrosome is not only the largest and most sophisticated protein complex within a eukaryotic cell, in the light of evolution, it is also one of its most ancient organelles. This special issue of “Cells” features representatives of three main, structurally divergent centrosome types, i.e., centriole-containing centrosomes, yeast spindle pole bodies (SPBs), and amoebozoan nucleus-associated bodies (NABs). Here, I discuss their evolution and their key-functions in microtubule organization, mitosis, and cytokinesis. Furthermore, I provide a brief history of centrosome research and highlight recently emerged topics, such as the role of centrioles in ciliogenesis, the relationship of centrosomes and centriolar satellites, the integration of centrosomal structures into the nuclear envelope and the involvement of centrosomal components in non-centrosomal microtubule organization.

Cytoskeleton interactions in the ascus development and sporulation of Sordaria macrospora

1993 ◽  
Vol 104 (3) ◽  
pp. 883-898 ◽  
Author(s):  
C. Thompson-Coffe ◽  
D. Zickler
Keyword(s):  
Spindle Pole ◽  
Sordaria Macrospora ◽  
Filamentous Ascomycete ◽  
Spindle Pole Bodies ◽  
Double Label ◽  
Butanedione Monoxime ◽  
Myosin Interaction ◽  
And Migration ◽  
Relationship Of ◽  
The Relationship

The organization of actin during meiosis and sporulation in the ascus of the filamentous ascomycete Sordaria macrospora was determined by immunofluorescence without removal of the cell wall. Actin is present as a dense cortical network of microfilaments (MF) and plaques, a perinuclear shell of actin in prophase I of meiosis, and a complex array of MF involved in alignment of prespore nuclei and closure of spore cell membranes. The relationship of actin to the previously examined microtubule system of the ascus was determined by double-label immunofluorescence. The cytoskeletal inhibitors nocodazole, cytochalasin D and 2,3-butanedione monoxime were used to examine the roles of actin and myosin in ascus development. Microfilament and microtubule arrays are interdependant; disruption of one network results in abnormalities in the other. Both microfilaments and actin-myosin interaction are required for separation and migration of duplicated spindle pole bodies, septation and sporulation

Ethics Committees and Consultation in Mental Health

2018 ◽  
Author(s):  
Don C. Postema
Keyword(s):  
Ethics Education ◽  
Ethics Committees ◽  
The United States ◽  
Biomedical Ethics ◽  
Spiritual Beliefs ◽  
The Social ◽  
History Of ◽  
Relationship Of ◽  
The Relationship

Understanding the role of ethics committees in providing ethics consultations, ethics education, and ethics-related policies is the context for exploring the relationship of ethics, psychiatry, and religious and spiritual beliefs. After a brief history of biomedical ethics in the United States since the mid-20th century, this chapter presents several case studies that exemplify frequently encountered tensions in these relationships. The central contention is that respecting these beliefs is not equivalent to acquiescing to ethical claims based on them. Rigorous critical reflection and psychiatric insight, coupled with the values embedded in the social practices of healthcare, provide the grounds for evaluating the weight and bearing of religious and spiritual beliefs in ethically complex cases. This is one contribution that ethics committees can make at the intersection of psychiatry and religion.

scholarly journals CENTROSOMES AND MICROTUBULES DURING MEIOSIS IN THE MUSHROOM BOLETUS RUBINELLUS

1971 ◽  
Vol 50 (3) ◽  
pp. 737-745 ◽  
Author(s):  
David J. McLaughlin
Keyword(s):  
Electron Microscope ◽  
Longitudinal Axis ◽  
Spindle Pole ◽  
Middle Part ◽  
Prophase I ◽  
Cytoplasmic Microtubules ◽  
Oriented Parallel ◽  
Relationship Of ◽  
The Relationship

The double centrosome in the basidium of Boletus rubinellus has been observed in three planes with the electron microscope at interphase preceding nuclear fusion, at prophase I, and at interphase I. It is composed of two components connected by a band-shaped middle part. At anaphase I a single, enlarged centrosome is found at the spindle pole, which is attached to the cell membrane. Microtubules mainly oriented parallel to the longitudinal axis of the basidium are present at prefusion, prophase I and interphase I. Cytoplasmic microtubules are absent when the spindle is present. The relationship of the centrosome in B. rubinellus to that in other organisms and the role of the cytoplasmic microtubules are discussed.

scholarly journals Tecnologia, ciência e o papel da educação: a ponderação da crítica de Theodor W. Adorno

2012 ◽  
Vol 1 (2) ◽  
Author(s):  
Priscila Monteiro Chaves ◽  
Gomercindo Ghiggi
Keyword(s):  
Human Action ◽  
Special Importance ◽  
Contemporary World ◽  
Theodor Adorno ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Critical Consideration

Resumo: Considerando o avanço das tecnologias bem como o binômio indissociável formado por ela e pela ciência – e consequentemente atrelados à educação –, configurando práticas enraizadas culturalmente na sociedade atual, o presente artigo traz como objetivo central discutir a relação da técnica (tékhné) com a concepção de homem que se quer formar, à luz das críticas adornianas. Ponderando o imperativo de subverter a ideologia utilitarista da educação, tal reflexão se justifica pela necessidade de compreensão do papel do educador, bem como da instituição escolar, mediante tal avanço nos últimos tempos. Concluindo que esta relação não pode suceder de maneira alienada, acrítica e indiferente, pois uma educação após Auschwitz deve certamente estar receptiva à relevância essencial da tecnologia em um mundo contemporâneo. No entanto, não é o sujeito que está a serviço dela e sim a relação contrária, em que o educando possa valer-se dos recursos tecnológicos como mais uma dimensão do agir humano. Como potente braço prolongado do operari humano, pensada como acontecimento paradigmático na história do ser. Palavras-chave: Theodor Adorno; tecnologia; educação; professor. TECHNOLOGY, SCIENCE AND THE ROLE OF EDUCATION: A CRITICAL CONSIDERATION OF THEODOR W. ADORNO Abstract: Considering the advancement of technologies as well as the inseparable duo formed by her and science - and thus tied to education - setting culturally rooted practices in today's society, this paper aims at discussing the relationship of technique (tékhné) with the concept of man constructed in the light of adornian criticism. Given the imperative to subvert the utilitarian ideology of education. Such reflection is justified by the necessity of understanding the role of the educator as well as the school, by this advance in recent times. Concluding that this relationship can not succeed in an alienated, uncritical and indifferent way, since an education after Auschwitz should certainly be receptive to the special importance of technology in a contemporary world. However, it is not the subject who is in her service, but the opposite relationship, in which the student can make use of technological resources as another dimension of human action. A powerful extended arm of human operari, thought as paradigmatic event in the history of being. Keywords: Theodor Adorno; technology; education; teacher.  

scholarly journals The Portuguese Maritime Voyages of Discovery: the exploration of the history of a city with an App as an educational resource

2019 ◽  
pp. 85-99 ◽  
Author(s):  
Cláudia Faria ◽  
Elsa Guilherme ◽  
Joaquim Pintassilgo ◽  
Maria João Mogarro ◽  
Ana Sofia Pinho ◽  
...  
Keyword(s):  
Teaching And Learning ◽  
Participant Observation ◽  
Collaborative Work ◽  
Mobile Technologies ◽  
School Students ◽  
History Of ◽  
Relationship Of ◽  
The Relationship ◽  
The City

In this paper we present an evaluation of an App for mobile devices, ‘Roteiro dos Descobrimentos’, as an educational digital resource for primary school students. The study involved the participation of 131 students and eight teachers. Data were collected from participant observation, students’ questionnaires and interviews to students and teachers. According to students, they learned new things, related with the topics explored, in an easy and funny way. Students also emphasized as positive aspects the fact that they had to face different challenges and the need to mobilize their knowledge to solve them. Teachers referred that students showed great interest and enthusiasm during the activities. As main gains, teachers stressed that the application fosters the relationship of students with the city, facilitates collaboration, and promotes students’ autonomy. In resume, it seems that the playful and interactive dimension of the App promoted the development of important skills such as the ability to interact with the environment, collaborative work, autonomy, and reading and interpretation skills. As a conclusion, there is a great receptivity to integrate mobile technologies in the teaching and learning process, but the role of the teacher can’t be dismissed, as a mediator and educator.

Isfahan during the Turko-Mongol Period (11th-15th Centuries)

2018 ◽  
Vol 16 (1-2) ◽  
pp. 253-312
Author(s):  
David Durand-Guédy
Keyword(s):  
Local Communities ◽  
General Context ◽  
Urban Decline ◽  
Local Elites ◽  
History Of ◽  
Special Circumstances ◽  
Relationship Of ◽  
The Relationship ◽  
Synthesis View

AbstractThis article deals with the history of Isfahan during the five centuries between the arrival of the Turks and the beginning of the Safavid period. It attempts to identify the continuities and ruptures from three different perspectives: To what extent can we speak of an urban decline? What was the relationship of the Isfahanis with the imperial rulers? How did the general context impact the makeup and the organisation of the society? It appears that Isfahan demonstrated remarkable resilience over the period, and that it is only beginning with the Timurid period that we can speak of a decline. Likewise, there is remarkable continuity in the ways in which the local elites collaborated with or resisted the imperial players. The role of the Ṣāʿid family, which held the cadial function over four centuries, is emblematic in this respect. Conversely, under special circumstances, the imperial players were able to exert great substantial influence on the local communities, and it is this political backing which explains the strengthening of the Hanafis in the sixth/twelfth century, and that of the Shiis in the following. One of the main accomplishments of this synthesis view of Isfahan history is that it assesses the effects of the Mongol domination relative to that of other periods.

Mathematical and Elemental Coordinates: The Role of Imagination

2014 ◽  
Vol 44 (2) ◽  
pp. 161-169
Author(s):  
Bernard Freydberg
Keyword(s):  
Practical Reason ◽  
Fractal Geometry ◽  
History Of Philosophy ◽  
Creative Evolution ◽  
Logic Of Imagination ◽  
History Of ◽  
Dance Companies ◽  
Relationship Of ◽  
The Relationship

Both in Force of Imagination: The Sense of the Elemental (2000) and in his very recent Logic of Imagination: The Expanse of the Elemental (2012), John Sallis enacts a reconfiguration of the relationship of geometry to elementology, which might be regarded more generally as a rethinking of the relation of mathematics to philosophy. The paper will trace this reconfiguration in two ways: (1) as it lies present but concealed in the history of philosophy, for example, in Descartes’ so-called “dualism” and in Kant’s pure productive imagination, and (2) in its present creative evolution in fractal geometry, as Sallis interprets it. Sallis draws together the mathematical affinity with a fundamental aesthetic drive, likening mathematical patterns to choreographic ones. I conclude by following this strain as it points to specific dance companies, and to my own sense of aesthetic homecoming as presented in my Imagination in Kant’s Critique of Practical Reason.

scholarly journals The Imaginaries of RuNet

2017 ◽  
Vol 2 (1) ◽  
pp. 54-79 ◽  
Author(s):  
Gregory Asmolov ◽  
Polina Kolozaridi
Keyword(s):  
The Internet ◽  
Political Role ◽  
History Of ◽  
Global Nature ◽  
The Government ◽  
Relationship Of ◽  
The Relationship ◽  
Culture And Language

By exploring the changes among online elites who have constructed the Internet, this article traces the unique history of the Russian Internet (RuNet). Illustrating how changes in online elites can be associated with changes in the socio-political role of the online space in general, it concludes that, although the Internet is of global nature, its space is constructed on the level of nation, culture and language. To show this, the article presents five stages in the development of RuNet, suggesting that the change in the stages is associated with the relationship of power between, first, actors (users, developers, the government, etc.) that construct Internet space and, second, alternative elites that emerge online and the traditional elites that seek to take the online space under their control by making their imaginary dominate.

scholarly journals LINGUISTIC CHARACTERISTICS OF THE SYSTEM OF NATIONAL VALUES IN ART

2020 ◽  
Vol 74 (4) ◽  
pp. 78-82
Author(s):  
S. Zhirenov ◽  
◽  
А. Smanova ◽  
Zh. Nebesaeva ◽  
◽  
...  
Keyword(s):  
Cultural Values ◽  
National Culture ◽  
Social Life ◽  
Folk Wisdom ◽  
National Values ◽  
History Of ◽  
Aesthetic Cognition ◽  
Relationship Of ◽  
The Relationship

The article considers the coding of the system of national values in Kazakh art and their linguistic expression in the linguocultural aspect. There is a linguistic representation of the place of art in the national culture, the activity of cultural values in the worldview of the ethnos. If the indicator of the culture of an ethnos is cultural values, then the value of cultural values is determined by language. Art is an indicator of cultural and social life, endowed with the ancient cultural and spiritual value of the national existence of the ethnos. Considering that different forms of art and their compositions are marked and distinguished by language, the article analyzes in detail the question of the relationship of art to language, language to art. The existence of such categories as the history of a nation and the ethics of words, culture and art of an ethnos, aesthetic cognition and taste, folk wisdom and spiritual food is considered in the existence of a language. The role of language in expressing the essence of art is described in detail.

Women in the Service Industries: National Perspectives

2007 ◽  
Vol 81 (3) ◽  
pp. 421-427 ◽  
Author(s):  
Angel Kwolek-Folland ◽  
Margaret Walsh
Keyword(s):  
Case Studies ◽  
Service Sector ◽  
Service Industries ◽  
Business History ◽  
Special Issue ◽  
History Of ◽  
Relationship Of ◽  
The Relationship

The purpose of this special issue is to explore the relationship of gender in several national contexts to the service industriesbusinesses that provide benefit to others or produce items or infrastructure that support others. Several questions have guided our overall purpose. What do we learn about business history generally, and the service sector specifically, by taking gender into account? Is what we learn the same in different national contexts? If not, why not? We hope that the answers suggested in the essays will stimulate dialogue on both national case studies and comparative themes and will illuminate transnational patterns and perspectives in the history of women, gender, and business.

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