Triacylglycerol biodegradation experiment in marine environmental conditions: definition of a new lipolysis index

2003 ◽  
Vol 34 (10) ◽  
pp. 1465-1473 ◽  
Author(s):  
Madeleine Goutx ◽  
Catherine Guigue ◽  
Laurent Striby
Keyword(s):  
Environmental Conditions ◽  
Definition Of ◽  
Marine Environmental

scholarly journals The Fracture Toughness of PVC / GRP Sandwich Systems in Marine Environment

2008 ◽  
Vol 17 (1) ◽  
pp. 096369350801700 ◽  
Author(s):  
Cemal Koçhan ◽  
Gökdeniz Neşer ◽  
Çiçek Özes
Keyword(s):  
Fracture Toughness ◽  
Constant Temperature ◽  
Marine Environment ◽  
Environmental Conditions ◽  
Sandwich Beam ◽  
Core Material ◽  
Mode I ◽  
Foam Core ◽  
Marine Environmental

The aim of this study is to investigate experimentally the fracture toughness of sandwich systems with the PVC foam core in marine environment with a Mode-I Cracked Sandwich Beam (CSB) test arrangement. Five CSB specimens at each condition were tested. To get the values under marine environment, one set of specimen was conditioned in a 5% solution of NaCl for a 120 h period at a constant temperature of 50°C. It has been found that the fracture toughness of the PVC foam core material slightly increases under marine environmental conditions. It can be concluded that under the conditions in this study the system with the PVC core was largely unaffected by the immersion process.

scholarly journals A TonB-Like Protein, SjdR, Is Involved in the Structural Definition of the Intercellular Septa in the Heterocyst-Forming Cyanobacterium Anabaena

mBio ◽  
2021 ◽  
Author(s):  
Hannah Schätzle ◽  
Sergio Arévalo ◽  
Enrique Flores ◽  
Enrico Schleiff
Keyword(s):  
Adaptive Capacity ◽  
Resource Utilization ◽  
Environmental Conditions ◽  
Biochemical Processes ◽  
Cyanobacterium Anabaena ◽  
Definition Of ◽  
Structural Definition

Multicellularity in bacteria confers an improved adaptive capacity to environmental conditions and stresses. This includes an enhanced capability of resource utilization through a distribution of biochemical processes between constituent cells.

Parameter Correlation in Models of Hyperthermic Cell Death

2011 ◽  
Author(s):  
Neil T. Wright
Keyword(s):  
Cell Death ◽  
Ionizing Radiation ◽  
Mathematical Models ◽  
Environmental Conditions ◽  
First Principle ◽  
Multiple Targets ◽  
Cellular Targets ◽  
Parameter Correlation ◽  
Temperature Ranges ◽  
Definition Of

A number of mathematical models have been developed to predict the survival of cells after heating. Some of these models have been based on first principle arguments, while others have been empirically motivated. Some models have been inspired by analogs of damage to cells by ionizing radiation. Evidence exists for multiple targets leading to cell death, although precise definition of the pathways for the various temperature ranges and environmental conditions remains in question. For reviews of the cellular targets of heating, see [1], [2], or [3].

Marine Environmental Carrying Capacity Monitoring System: A Monitoring Framework to Achieve Marine Environment Adaptive Management

2013 ◽  
Vol 726-731 ◽  
pp. 1504-1507 ◽  
Author(s):  
Min Jie Kang ◽  
Wei Xin Luan
Keyword(s):  
Monitoring System ◽  
Adaptive Management ◽  
Marine Environment ◽  
Carrying Capacity ◽  
Marine Pollution ◽  
Environmental Carrying Capacity ◽  
Management Measures ◽  
Monitoring Framework ◽  
Definition Of ◽  
Marine Environmental

The marine pollution problem is mainly related to inputs to the ocean directly or indirectly through the atmosphere, from land-based sources or land-based activities of society. The management of this is essentially associated with managing in an adequate way our activities on land. Monitoring, evaluation and adaptation are necessary to ensure that marine management measures are both effective and efficient. Marine environmental carrying capacity monitoring system is a monitoring framework to achieve marine environment adaptive management, the core of the system is monitoring marine environmental carrying capacity under DPSIR model. This paper introduces a definition of marine environmental carrying capacity and the conceptual framework for marine environmental carrying capacity monitoring system.

scholarly journals Corrosion at low moisture content in both carbonated and chloride polluted concrete – Villa E-1027, a case study

2019 ◽  
Vol 289 ◽  
pp. 10007
Author(s):  
Elisabeth Marie-Victoire ◽  
Myriam Bouichou
Keyword(s):  
Reinforced Concrete ◽  
Moisture Content ◽  
Cultural Heritage ◽  
Environmental Conditions ◽  
Electrochemical Measurements ◽  
Corrosion Activity ◽  
Definition Of ◽  
Ancient Monuments ◽  
Non Destructive

Corrosion in reinforced concrete is generally attributed to either carbonation or chloride presence in the vicinity of the bars. But in the field of cultural heritage, especially for the most ancient monuments, it is not rare to encounter both carbonated and chloride polluted concrete, inducing heavy corrosion, as was the case in the Villa E-1027 in Roquebrune-Cap-Martin, on the French Mediterranean seashore. The villa was designed by Eileen Gray and Jean Badovici between 1926 and 1929. Due to aggressive environmental conditions and a period of dereliction, the concrete of the villa was quite heavily decayed and a deep restoration was led between 2000 and 2006. But after a little more than 10 years, and despite active maintenance, the villa is again facing corrosion induced decay. Prior to the definition of a new restoration protocol, to better evaluate the corrosion activity, in 2017 a permanent monitoring of moisture and temperature both in the air and in the concrete was installed. In the meantime, a series of instant electrochemical measurements was performed from 2017 to 2018. A first analysis of the results of the monitoring and the non-destructive tests clearly evidences that probably due to the conjunction of the carbonation of the concrete and external active chloride pollution, corrosion can happen at quite low moisture content.

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