A breath of fresh air for atmospheric CO2 utilisation: plasmon-assisted preparation of cyclic carbonate at ambient conditions

2021 ◽  
Author(s):  
Olga Guselnikova ◽  
Pavel S Postnikov ◽  
Jiri Kosina ◽  
Zdenka Kolska ◽  
Andriy Trelin ◽  
...  
Keyword(s):  
21St Century ◽  
Cyclic Carbonate ◽  
Atmospheric Co2 ◽  
Advanced Materials ◽  
Ambient Conditions ◽  
Global Problem ◽  
Co2 Level ◽  
Co2 Utilisation

The increase of CO2 level becomes a global problem of 21st century leading to the actual request for new advanced materials and methods of CO2 utilisation. Here, we propose the...

Canopy development and hydraulic function in Eucalyptus tereticornis grown in drought in CO2-enriched atmospheres

2007 ◽  
Vol 34 (12) ◽  
pp. 1137 ◽  
Author(s):  
Brian J. Atwell ◽  
Martin L. Henery ◽  
Gordon S. Rogers ◽  
Saman P. Seneweera ◽  
Marie Treadwell ◽  
...  
Keyword(s):  
Elevated Co2 ◽  
Shoot Growth ◽  
Co2 Enrichment ◽  
Atmospheric Co2 ◽  
Shoot Biomass ◽  
Eucalyptus Tereticornis ◽  
Growth Responses ◽  
Ambient Conditions ◽  
Long Distance ◽  
Pipe Model

We report on the relationship between growth, partitioning of shoot biomass and hydraulic development of Eucalyptus tereticornis Sm. grown in glasshouses for six months. Close coordination of stem vascular capacity and shoot architecture is vital for survival of eucalypts, especially as developing trees are increasingly subjected to spasmodic droughts and rising atmospheric CO2 levels. Trees were exposed to constant soil moisture deficits in 45 L pots (30–50% below field capacity), while atmospheric CO2 was raised to 700 μL CO2 L–1 in matched glasshouses using a hierarchical, multi-factorial design. Enrichment with CO2 stimulated shoot growth rates for 12–15 weeks in well-watered trees but after six months of CO2 enrichment, shoot biomasses were not significantly heavier (30% stimulation) in ambient conditions. By contrast, constant drought arrested shoot growth after 20 weeks under ambient conditions, whereas elevated CO2 sustained growth in drought and ultimately doubled the shoot biomass relative to ambient conditions. These growth responses were achieved through an enhancement of lateral branching up to 8-fold due to CO2 enrichment. In spite of larger transpiring canopies, CO2 enrichment also improved the daytime water status of leaves of droughted trees. Stem xylem development was highly regulated, with vessels per unit area and cross sectional area of xylem vessels in stems correlated inversely across all treatments. Furthermore, vessel numbers related to the numbers of leaves on lateral branches, broadly supporting predictions arising from Pipe Model Theory that the area of conducting tissue should correlate with leaf area. Diminished water use of trees in drought coincided with a population of narrower xylem vessels, constraining hydraulic capacity of stems. Commensurate with the positive effects of elevated CO2 on growth, development and leaf water relations of droughted trees, the capacity for long-distance water transport also increased.

Degradation of Kresoxim-Methyl in Water: Impact of Varying pH, Temperature, Light and Atmospheric CO2 Level

2015 ◽  
Vol 96 (1) ◽  
pp. 130-136 ◽  
Author(s):  
Ashish Khandelwal ◽  
Suman Gupta ◽  
Vijay T. Gajbhiye ◽  
Eldho Varghese
Keyword(s):  
Atmospheric Co2 ◽  
Water Impact ◽  
Co2 Level

scholarly journals Evidences of Widespread Cretaceous Deep Weathering and Its Consequences: A Review

2016 ◽  
Vol 5 (2) ◽  
pp. 69 ◽  
Author(s):  
Timothy Bata
Keyword(s):  
Climatic Condition ◽  
Atmospheric Co2 ◽  
Present Value ◽  
Weathering Processes ◽  
Greenhouse Climate ◽  
Temperature And Humidity ◽  
Co2 Level

This study highlights the effect of the Cretaceous greenhouse climate on weathering processes. Atmospheric CO2 level was relatively higher in the Cretaceous than it was in both the Jurassic and the Cenozoic. Consequently, temperature and humidity were higher in the Cretaceous than in the Jurassic and the Cenozoic. The interaction among the high levels of atmospheric CO2, extreme global warmth, and humidity in the Cretaceous resulted in widespread deep weathering. Cretaceous palaeo-weathering profiles are observed to occur at higher palaeolatitudes relative to the Jurassic and Cenozoic palaeo-weathering profiles. This implies the upward warming of the Cretaceous palaeolatitude, consistent with palaeotemperature estimates for the Cretaceous. The present thickness of weathering profiles in some selected tropical zones is approximately 200 m. During the greenhouse climatic condition in the Cretaceous, the thickness of weathering profiles at those areas could have been up to 4–5 times the present value. This suggests that many sediments were produced from the Cretaceous weathering events.

scholarly journals Supernatural Characters in the Quasi-Historical Discourse of Modern Ukrainian Literature: Specificity and Functions

2021 ◽  
Vol 11 (2) ◽  
pp. 49-63
Author(s):  
Oleksandra Nikolova ◽  
Kateryna Vasylyna
Keyword(s):  
21St Century ◽  
Historical Novels ◽  
Historical Discourse ◽  
Early 21St Century ◽  
Global Problem ◽  
The Past ◽  
Public Consciousness ◽  
Historical Past ◽  
The Early 21St Century

: The article is aimed at the study of Ukrainian quasi-historical novels of the early 21st century, characterized by the renunciation of “objectivity” of the narrative and emphasized the role of imagination. These are the pieces by Bakalets and Yarish (“From the Seventh Bottom”), Vynnychuk (“The Pharmacist”, “Lutetia”), and by Yatsenko (“Nechui. Nemov. Nebach”). The study reveals the features and functions of fantastic characters in the abovementioned novels. These fictional images of modern Ukrainian quasihistorical literary discourse are characterized by infernality, grotesque anthropomorphism, destruction of traditional antinomy “otherworldly– earthly/human”, philosophical and ironic coloring. Interpreting the fantasy in quasi-historical novels is expedient in the context of the global problem of perception of historical past by people of the 21st Century, with an emphasis on significant changes in public consciousness motivating writers to “Re-write/Reimagine the past”. The spread of this phenomenon reveals public distrust of the authorities, offering “correct” answers to the questions about past events, protest against permanent manipulation of historical facts (the tendency of growing consciousness and intellectualization of society).

g-C3N4 and tetrabutylammonium bromide catalyzed efficient conversion of epoxide to cyclic carbonate under ambient conditions

2017 ◽  
Vol 41 (24) ◽  
pp. 14839-14842 ◽  
Author(s):  
Tanmoy Biswas ◽  
Venkataramanan Mahalingam
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Ambient Conditions ◽  
Efficient Catalyst ◽  
Efficient Conversion

A g-C3N4 and n-Bu4N+Br− combination was found to be an efficient catalyst for the conversion of epoxides to cyclic carbonates under CO2 filled balloon conditions.

scholarly journals UN international legal instruments in the context of solving the global problem of refugees and migrants

2019 ◽  
pp. 83-100
Author(s):  
Liubov Zhvanko
Keyword(s):  
21St Century ◽  
Steady Increase ◽  
Internally Displaced Persons ◽  
Displaced Persons ◽  
Global Compact ◽  
Internally Displaced ◽  
Global Problem ◽  
Global Problems

The article analyzes the most recent challenge of the 21st century. – a steady increase in the number of displaced persons. The author first analyzed the “modification” of the causes of their appearance during the XX – XXI centuries from the classic – two world wars to the new – environmental and man-made disasters. It is proved that this problem belongs to the global problems of mankind, and therefore requires a search for the highest-level solution to the UN resolutions. Because it is impossible to overcome at least today, the community has embarked on a path of control and regulation, for which the Global Compact on Safe, Organized and Regulated Migration and the Global Refugee Treaty were adopted in 2018 at the UN level. The author concludes that the Global Compact on Safe, Organized and Regulated Migration and the Global Refugee Treaty are, in fact, the first step in the efforts of at least the first attempts to resolve the case, but their declarative nature casts doubt on the possibility of solving this global problem. The problem of internally displaced persons in Ukraine, the emergence of which was the result of the Russian Federation’s war against Ukraine and the inability at present to join our state to implement the provisions of the above documents, was stressed separately.

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