scholarly journals New Perspectives Related to the Bioluminescent System in Dinoflagellates: Pyrocystis lunula, a Case Study

2020 ◽  
Vol 21 (5) ◽  
pp. 1784
Author(s):  
Carlos Fajardo ◽  
Marcos De Donato ◽  
Hectorina Rodulfo ◽  
Gonzalo Martinez-Rodriguez ◽  
Benjamin Costas ◽  
...  

Pyrocystis lunula is considered a model organism due to its bioluminescence capacity linked to circadian rhythms. The mechanisms underlying the bioluminescent phenomenon have been well characterized in dinoflagellates; however, there are still some aspects that remain an enigma. Such is the case of the presence and diversity of the luciferin-binding protein (LBP), as well as the synthesis process of luciferin. Here we carry out a review of the literature in relation to the molecular players responsible for bioluminescence in dinoflagellates, with particular interest in P. lunula. We also carried out a phylogenetic analysis of the conservation of protein sequence, structure and evolutionary pattern of these key players. The basic structure of the luciferase (LCF) is quite conserved among the sequences reported to date for dinoflagellate species, but not in the case of the LBP, which has proven to be more variable in terms of sequence and structure. In the case of luciferin, its synthesis has been shown to be complex process with more than one metabolic pathway involved. The glutathione S-transferase (GST) and the P630 or blue compound, seem to be involved in this process. In the same way, various hypotheses regarding the role of bioluminescence in dinoflagellates are exposed.

Minerals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 370 ◽  
Author(s):  
Jean-Pierre Cuif ◽  
Yannicke Dauphin ◽  
Gilles Luquet ◽  
Kadda Medjoubi ◽  
Andrea Somogyi ◽  
...  

A top-down approach to the mineralized structures and developmental steps that can be separated in the shells of Pinctada margaritifera was carried out. Detailed characterizations show that each of the two major layers usually taken into account (the outer prismatic layer and the inner nacreous layer) is actually the result of a complex process during which the microstructural patterns were progressively established. From its early growing stages in the deeper part of the periostracal grove up to the formation of the most inner nacreous layers, this species provides a demonstrative case study illustrating the leading role of specifically secreted organic structures as determinants of the crystallographic properties of the shell-building units. Gathering data established at various observational scales ranging from morphology to the nanometer level, this study allows for a reexamination of the recent and current biomineralization models.


Author(s):  
Zhang HUA ◽  
Liu YANING ◽  
Jilong WANG

In the past few years, with the development of technology and industrial upgrading, a growing number of countries are facing the problem of how to transform their industrial heritages, especially if they are in downtowns. Public administration top managers have a main role in this complex process of purpose and ownership changes. By examining the transformation of industrial heritage in Shanghai – a case-study examined through interviews, chronology of events and content analyses –, this paper explores how the government has used the idea of holistic governance in creating an exhaustive plan and implementing it. The study also explores the government’s attempt to build social consensus regarding that major transition, including the role of communication with citizens.


2020 ◽  
Author(s):  
Cora González otero

Given the current wave of nationalisms in Spain, this research project aims to explore the connection between nationalism and women in Galicia, a nation in north-western Spain. Through Lovenduski’s framework of ‘feminising politics‘, and Dean and Maiguashca’s ‘feministisation’ analytical criteria, this qualitative study seeks to identify the process of ‘feministisation’ that has been taken place in Galician nationalism, the role of women activists in this process and the obstacles encountered; ultimately assessing this ‘feministisation’ as a strategy to find a path towards reconciliation.Based on the experiences of women activists collected through semi-structured in-depth interviews, the study has identified that the alliance of feminism and nationalism has allowed international and local networks to be interwoven, and it has also positioned feminist values and gender analysis at the core of the Galician Nationalist Bloc (BNG), one of the institutional organisations within Galician nationalism. Additionally, it has defined ‘feministisation’ as a complex process where the wide context of an internal crisis, the years of collective work by feminist groups and individuals, and the current hegemonic acceptance of feminism in Galician society have played their part. The study concludes that there is substantial evidence to identify a process of feministisation that is taking place within the Galician Nationalist Bloc and that the characteristics and values of this process could become a strategy to forge a path towards a more tolerant and internationalist reconciliation.


2019 ◽  
pp. 106-113
Author(s):  
Irina Valentinovna Ivlieva

The article examines the implicit components in the meaning of semantically modified derivatives. Using the methods of componential analysis of definitions from various Russian explanatory and aspectual dictionaries, the implicit components in the sound verbs’ meanings are inventoried. The impact of the relevant implicit components on the synthesis process is examined; the dichotomy of the implicit components of meaning and corresponding synthesizing prefixes is identified. The productivity and typical colloquial usage of synthesized derivatives is demonstrated using data from the Russian National Corpus.


2018 ◽  
Vol 19 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Matthew Cook

Product service systems (PSS) may usefully form part of the mix of innovations necessary to move society towards more sustainable futures. However, despite such potential, PSS implementation is highly uneven and limited. Drawing on an alternate sociotechnical perspective of innovation, this article provides fresh insights on, among other things, the role of context in PSS innovation, to address this issue. Case study research is presented focusing on a use-orientated PSS in an urban environment: the Copenhagen city bike scheme. The article shows that PSS innovation is a situated complex process, shaped by actors and knowledge from other locales. It argues that further research is needed to investigate how actors’ interests shape PSS innovation. It recommends that institutional spaces should be provided in governance landscapes associated with urban environments to enable legitimate PSS concepts to co-evolve in light of locally articulated sustainability principles and priorities.


2015 ◽  
Vol 3 (3) ◽  
pp. 129-141 ◽  
Author(s):  
Kyle A. Rich ◽  
Laura Misener ◽  
Dan Dubeau

While sport is widely understood to produce positive social outcomes for communities, such as the inclusion of diverse and marginalized groups, little researched has focused on the specific processes through which these outcomes may or may not be occurring. In this paper, we discuss the Community Cup program, and specifically a participatory sport event which seeks to connect newcomers to Canada (recent immigrants and refugees) in order to build capacity, connect communities, and facilitate further avenues to participation in community life. For this research, we worked collaboratively with the program to conduct an intrinsic case study, utilizing participant observation, document analysis, focus group, and semi-structured interviews. We discuss how the structure and organization of the event influences participants’ experiences and consequently how this impacts the adaptation and acculturation processes. Using Donnelly and Coakley's (2002) cornerstones of social inclusion and Berry’s (1992) framework for understanding acculturation, we critically discuss the ways that the participatory sport event may provide an avenue for inclusion of newcomers, as well as the aspects of inclusion that the event does not address. While exploratory in nature, this paper begins to unpack the complex process of how inclusion may or may not be facilitated through sport, as well discussing the role of the management of these sporting practices. Furthermore, based on our discussion, we offer suggestions for sport event managers to improve the design and implementation of programming offered for diverse/newcomer populations.


2020 ◽  
Vol 11 (2) ◽  
pp. 49
Author(s):  
Gavin Melles

<p>India faces challenges in achieving sustainable inclusive growth. While business, finance, social and technical innovation and other reforms are necessary, stakeholder inclusion through participatory processes is essential for achieving inclusive development. Following decades of implementation globally, Human-centred Design (HCD) approaches are now being promoted in India as an answer to participatory and creative business, social and industry innovation, albeit less so as a tool for inclusive growth and innovation. However, there is a growing critique of HCD effectiveness, ambiguity about its role in the innovation process, and other questions. Enthusiasm in India for HCD and design thinking ignores this critique, and risks repeating history unless the benefits and limits of HCD for innovation generally and inclusive growth are understood. Following a review of the recent literature this paper identifies the role of HCD in an inclusive growth framework, highlights the real challenges, and presents an illustrative case of HCD application for slum redevelopment for discussion and development. This paper identifies design thinking as a vague umbrella term, highlights the need for an informed approach relative to inclusive growth, and suggests HCD is a potentially helpful adjunct to the complex process of inclusive growth.</p>


1987 ◽  
Author(s):  
William A. Worrall ◽  
Ann W. Stockman

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