Phylogeny, evolution of lichenivory and chemical sequestration in the lichen moth genusHypoprepia(Hübner) (Lepidoptera: Erebidae: Arctiinae: Lithosiini)

2016 ◽  
Author(s):  
Timothy J Anderson
Keyword(s):  
Chemical Sequestration

scholarly journals Dual chemical sequestration: a key mechanism in transitions among ecological specialization

2002 ◽  
Vol 269 (1486) ◽  
pp. 1-6 ◽  
Author(s):  
Arnaud Termonia ◽  
Jacques M. Pasteels ◽  
Donald M. Windsor ◽  
Michel C. Milinkovitch
Keyword(s):  
Ecological Specialization ◽  
Chemical Sequestration

scholarly journals A phylogenomic analysis of lichen-feeding tiger moths uncovers evolutionary origins of host chemical sequestration

2018 ◽  
Vol 121 ◽  
pp. 23-34 ◽  
Author(s):  
Clare H. Scott Chialvo ◽  
Pablo Chialvo ◽  
Jeffrey D. Holland ◽  
Timothy J. Anderson ◽  
Jesse W. Breinholt ◽  
...  
Keyword(s):  
Phylogenomic Analysis ◽  
Evolutionary Origins ◽  
Chemical Sequestration ◽  
Tiger Moths

scholarly journals Flotation of Chromite as Pre-Treatment of Olivine Before Carbonation for CO2 Sequestration

2017 ◽  
Vol 11 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Laura Turri ◽  
Hervé Muhr ◽  
Cristielen Rech ◽  
François Lapicque
Keyword(s):  
Co2 Sequestration ◽  
High Performance ◽  
Gas Flow ◽  
Separation Efficiency ◽  
Particle Diameter ◽  
Flow Conditions ◽  
Flotation Process ◽  
Industrial Grade ◽  
Chemical Sequestration ◽  
Pre Treatment

Background and Objective:For the sake of optimal beneficiation of the products formed in the chemical sequestration of CO2on silicates, extraction of the chromite has been carried out prior to carbonation, by flotation in a lab-scale column.Method:Industrial-grade olivine and serpentine were tested. Flow conditionse.g. gas flow rate, stirring, particle diameter of silicates, and physicochemical considerations (composition if the electrolyte solution) have been examined to optimize the separation efficiency in terms of chromite recovery or enrichment factor.Result:The high performance observed with chromite-enriched olivine allows a multistage flotation process from low-chromite minerals blends to be designed.Conclusion:The lower performance with native olivine was attributed to the existence of mixed chromite-silicate particles.

scholarly journals Mitochondria recycle nitrite back to the bioregulator nitric monoxide.

2000 ◽  
Vol 47 (4) ◽  
pp. 913-921 ◽  
Author(s):  
H Nohl ◽  
K Staniek ◽  
B Sobhian ◽  
S Bahrami ◽  
H Redl ◽  
...  
Keyword(s):  
Respiratory Chain ◽  
Paracoccus Denitrificans ◽  
Hypovolemic Shock ◽  
Heme Iron ◽  
Nitrite Reduction ◽  
No Donors ◽  
Mammalian Mitochondria ◽  
Membrane Bound ◽  
Chemical Sequestration ◽  
Nitric Monoxide

Nitric monoxide (NO) exerts a great variety of physiological functions. L-Arginine supplies amino groups which are transformed to NO in various NO-synthase-active isoenzyme complexes. NO-synthesis is stimulated under various conditions increasing the tissue of stable NO-metabolites. The major oxidation product found is nitrite. Elevated nitrite levels were reported to exist in a variety of diseases including HIV, reperfusion injury and hypovolemic shock. Denitrifying bacteria such as Paracoccus denitrificans have a membrane bound set of cytochromes (cyt cd1, cyt bc) which were shown to be involved in nitrite reduction activities. Mammalian mitochondria have similar cytochromes which form part of the respiratory chain. Like in bacteria quinols are used as reductants of these types of cytochromes. The observation of one-e- divergence from this redox-couple to external dioxygen made us to study whether this site of the respiratory chain may also recycle nitrite back to its bioactive form NO. Thus, the aim of the present study was therefore to confirm the existence of a reductive pathway which reestablishes the existence of the bioregulator NO from its main metabolite NO2-. Our results show that respiring mitochondria readily reduce added nitrite to NO which was made visible by nitrosylation of deoxyhemoglobin. The adduct gives characteristic triplet-ESR-signals. Using inhibitors of the respiratory chain for chemical sequestration of respiratory segments we were able to identify the site where nitrite is reduced. The results confirm the ubiquinone/cyt be1 couple as the reductant site where nitrite is recycled. The high affinity of NO to the heme-iron of cytochrome oxidase will result in an impairment of mitochondrial energy-production. "Nitrite tolerance" of angina pectoris patients using NO-donors may be explained in that way.

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