scholarly journals Site specific differentiation in metal tolerance in the midge Chironomus riparius (Diptera, Chironomidae)

Hydrobiologia ◽  
1995 ◽  
Vol 315 (2) ◽  
pp. 159-165 ◽  
Author(s):  
Jaap F. Postma ◽  
Mette Kyed ◽  
Wim Admiraal
Keyword(s):  
Metal Tolerance ◽  
Chironomus Riparius ◽  
Site Specific ◽  
Specific Differentiation

scholarly journals Making public space. About the same or about difference?

2017 ◽  
Vol 2 (2) ◽  
pp. 145
Author(s):  
Elena Piha
Keyword(s):  
Public Space ◽  
Subject Matter ◽  
Popular Opinion ◽  
Site Specific ◽  
Contemporary World ◽  
Specific Differentiation ◽  
Urban Condition ◽  
The Subject ◽  
Similarity And Difference ◽  
Political Economic

<p class="Body">This text is about making public space out of and within the omnipresent entirety of space which is the defining circumstance of the macrocosm that holds us and that we inhabit. It begins with a propositional discourse on how that omnipresent space differentiates into public space and further articulates into human places. It concludes with a comparative précis of eight actual projects for public space as programmed, designed, realised and adopted for different purposes in the different socio-cultural and geo-locational situations of five established cities. The focus is on similarity and difference, or how social demands, human aspirations and design rationales for public space might depend on their originating context. It is also more about socio-cultural constants from which design approaches or, better, attitudes arise than the socio-political, economic or otherwise practical variables of procurement and implementation of public space, which are fleeting and fluctuate by time, government, and popular opinion.<br />The text is organised in sections, which form a collage of things that matter in making public space in the contemporary world which is essentially defined by the contemporary urban condition where global interconnectedness—networks and inclusiveness—negotiates with site-specific differentiation—otherness and exclusiveness. The order of the text is from general to particular, abstract to concrete, so as to set the subject matter in the context of the larger whole it belongs to.</p>

Human mesenchymal stem cells engraft and demonstrate site-specific differentiation after in utero transplantation in sheep

10.1038/81395 ◽  
2000 ◽  
Vol 6 (11) ◽  
pp. 1282-1286 ◽  
Author(s):  
Kenneth W. Liechty ◽  
Tippi C. MacKenzie ◽  
Aimen F. Shaaban ◽  
Antoneta Radu ◽  
AnneMarie B. Moseley ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Human Mesenchymal Stem Cells ◽  
In Utero ◽  
Site Specific ◽  
In Utero Transplantation ◽  
Specific Differentiation

scholarly journals Ancient Heavy Metal Contamination in Soils as a Driver of Tolerant Anthyllis vulneraria Rhizobial Communities

2016 ◽  
Vol 83 (2) ◽  
Author(s):  
Roba Mohamad ◽  
Geraldine Maynaud ◽  
Antoine Le Quéré ◽  
Céline Vidal ◽  
Agnieszka Klonowska ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Metal Tolerance ◽  
Taxonomic Composition ◽  
Soil Conditions ◽  
Site Specific ◽  
Content Type ◽  
Anthyllis Vulneraria ◽  
Metal Levels

ABSTRACT Anthyllis vulneraria is a legume associated with nitrogen-fixing rhizobia that together offer an adapted biological material for mine-soil phytostabilization by limiting metal pollution. To find rhizobia associated with Anthyllis at a given site, we evaluated the genetic and phenotypic properties of a collection of 137 rhizobia recovered from soils presenting contrasting metal levels. Zn-Pb mine soils largely contained metal-tolerant rhizobia belonging to Mesorhizobium metallidurans or to another sister metal-tolerant species. All of the metal-tolerant isolates harbored the cadA marker gene (encoding a metal-efflux PIB-type ATPase transporter). In contrast, metal-sensitive strains were taxonomically distinct from metal-tolerant populations and consisted of new Mesorhizobium genospecies. Based on the symbiotic nodA marker, the populations comprise two symbiovar assemblages (potentially related to Anthyllis or Lotus host preferences) according to soil geographic locations but independently of metal content. Multivariate analysis showed that soil Pb and Cd concentrations differentially impacted the rhizobial communities and that a rhizobial community found in one geographically distant site was highly divergent from the others. In conclusion, heavy metal levels in soils drive the taxonomic composition of Anthyllis-associated rhizobial populations according to their metal-tolerance phenotype but not their symbiotic nodA diversity. In addition to heavy metals, local soil physicochemical and topoclimatic conditions also impact the rhizobial beta diversity. Mesorhizobium communities were locally adapted and site specific, and their use is recommended for the success of phytostabilization strategies based on Mesorhizobium-legume vegetation. IMPORTANCE Phytostabilization of toxic mine spoils limits heavy metal dispersion and environmental pollution by establishing a sustainable plant cover. This eco-friendly method is facilitated by the use of selected and adapted cover crop legumes living in symbiosis with rhizobia that can stimulate plant growth naturally through biological nitrogen fixation. We studied microsymbiont partners of a metal-tolerant legume, Anthyllis vulneraria, which is tolerant to very highly metal-polluted soils in mining and nonmining sites. Site-specific rhizobial communities were linked to taxonomic composition and metal tolerance capacity. The rhizobial species Mesorhizobium metallidurans was dominant in all Zn-Pb mines but one. It was not detected in unpolluted sites where other distinct Mesorhizobium species occur. Given the different soil conditions at the respective mining sites, including their heavy-metal contamination, revegetation strategies based on rhizobia adapting to local conditions are more likely to succeed over the long term compared to strategies based on introducing less-well-adapted strains.

Cultured human sole-derived keratinocyte grafts re-express site-specific differentiation after transplantation

1998 ◽  
Vol 64 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Carolyn C. Compton ◽  
Kathleen B. Nadire ◽  
Sigrid Regauer ◽  
Gretchen Warland ◽  
Deborah B. Landry ◽  
...  
Keyword(s):  
Site Specific ◽  
Specific Differentiation
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