Direct Experimental Evidence for the High Chemical Reactivity of α‐ and β‐Xylopyranosides Adopting a 2,5 B Conformation in Glycosyl Transfer

2011 ◽  
Vol 17 (26) ◽  
pp. 7345-7356 ◽  
Author(s):  
Luis Amorim ◽  
Filipa Marcelo ◽  
Cyril Rousseau ◽  
Lidia Nieto ◽  
Jesús Jiménez‐Barbero ◽  
...  
Keyword(s):  
Experimental Evidence ◽  
Chemical Reactivity ◽  
High Chemical ◽  
Direct Experimental Evidence ◽  
High Chemical Reactivity

Study on Chemical Reactivity Control of Liquid Sodium: Development of Nano-Fluid and Its Property and Applicability to FBR Plant

2008 ◽  
Author(s):  
Jun-Ichi Saito ◽  
Kuniaki Ara ◽  
Ken-Ichiro Sugiyama ◽  
Hiroshi Kitagawa ◽  
Haruyuki Nakano ◽  
...  
Keyword(s):  
Chemical Reactivity ◽  
Nano Particles ◽  
Liquid Sodium ◽  
Atomic Interaction ◽  
Nano Particle ◽  
Fast Breeder Reactor ◽  
Weak Point ◽  
High Chemical ◽  
Nano Fluid ◽  
High Chemical Reactivity

Liquid sodium is used as the coolant of the fast breeder reactor (FBR). A weak point of sodium is a high chemical reactivity with water or oxygen. So an idea of chemical reactivity suppression of liquid sodium itself is proposed. The idea is that nano-meter size particles (hereafter called nano-particles) are dispersed in liquid sodium, and an atomic interaction which is generated between nano-particle and sodium atoms is applied to suppress the chemical reactivity. We call sodium that has dispersed the nano-particle a Nano-fluid. Three key technologies which are the trial manufacture of Nano-fluid, the reaction property of the Nano-fluid and applicability of Nano-fluid to FBR Plant have been carried out to develop the Nano-fluid.

Viscose Pulps from Egyptian Bagasse with High Chemical Reactivity

Holzforschung ◽  
1991 ◽  
Vol 45 (6) ◽  
pp. 433-436 ◽  
Author(s):  
Samia A. Helmy ◽  
M. Amine Abou-State
Keyword(s):  
Chemical Reactivity ◽  
High Chemical ◽  
High Chemical Reactivity

scholarly journals The importance of cylinder passivation chemistry for preparation and long-term stability of multicomponent monoterpene primary reference materials

2018 ◽  
Author(s):  
Nicholas D. C. Allen ◽  
David R. Worton ◽  
Paul J. Brewer ◽  
Céline Pascale ◽  
Bernhard Niederhauser
Keyword(s):  
Reference Materials ◽  
Chemical Reactivity ◽  
International System ◽  
High Chemical ◽  
Term Stability ◽  
Long Term Stability ◽  
System Of Units ◽  
Primary Reference ◽  
High Chemical Reactivity

Abstract. Monoterpenes play an important role in atmospheric chemistry due to their large anthropogenic and biogenic emission sources and high chemical reactivity. As a consequence, measurements are required to assess how changes in emissions of monoterpenes impact air quality. Accurate and comparable measurements of monoterpenes in indoor and outdoor environments require gaseous primary reference materials (PRMs) that are traceable to the international system of units (SI). PRMs of monoterpenes are challenging to produce due to the high chemical reactivity and low vapour pressures of monoterpenes and also their propensity to convert into other compounds, including other terpenes. In this paper, the long-term stability of gravimetrically prepared static monoterpene PRMs produced in differently passivated cylinders, including sampling canisters, was assessed. We demonstrate that static PRMs of multiple monoterpenes can be prepared and used as a suitable long-term standard. For the first time the effect of cylinder pressure and decanting from one cylinder to another on the chemical composition and amount fraction of monoterpenes was also studied. Gravimetrically prepared PRMs of limonene in high pressure cylinders were compared to a novel portable dynamic reference gas generator based on dilution of pure limonene vapour emitted from a permeation tube.

scholarly journals Plasma and Aerosols: Challenges, Opportunities and Perspectives

2019 ◽  
Vol 9 (18) ◽  
pp. 3861 ◽  
Author(s):  
Augusto Stancampiano ◽  
Tommaso Gallingani ◽  
Matteo Gherardi ◽  
Zdenko Machala ◽  
Paul Maguire ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Multidisciplinary Approach ◽  
Chemical Reactivity ◽  
Plasma Discharge ◽  
High Chemical ◽  
On Demand ◽  
High Chemical Reactivity ◽  
Biphasic Systems ◽  
Species Production

The interaction of plasmas and liquid aerosols offers special advantages and opens new perspectives for plasma–liquid applications. The paper focuses on the key research challenges and potential of plasma-aerosol interaction at atmospheric pressure in several fields, outlining opportunities and benefits in terms of process tuning and throughputs. After a short overview of the recent achievements in plasma–liquid field, the possible application benefits from aerosol injection in combination with plasma discharge are listed and discussed. Since the nature of the chemicophysical plasma-droplet interactions is still unclear, a multidisciplinary approach is recommended to overcome the current lack of knowledge and to open the plasma communities to scientists from other fields, already active in biphasic systems diagnostic. In this perspective, a better understanding of the high chemical reactivity of gas–liquid reactions will bring new opportunities for plasma assisted in-situ and on-demand reactive species production and material processing.

Management of Maceration-Fermentation Technologies Regarding the Antioxidant Profiles of Some Wines from Iasi Vineyard

2018 ◽  
Vol 68 (12) ◽  
pp. 2922-2924
Author(s):  
Gabriela Ignat ◽  
Cintia Colibaba ◽  
Carmen Luiza Costuleanu ◽  
Andreea Alexandra Timofte ◽  
Ion Sandu ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Chemical Reactivity ◽  
Biological Properties ◽  
Chemical Processes ◽  
High Chemical ◽  
Phenol Compounds ◽  
Fermentation Processes ◽  
Anti Cancer ◽  
High Chemical Reactivity

The vine contains, in addition to sugars and acids, important amounts of phenolic compounds that accumulate in the solid parts of grapes (clusters, seeds) and skin. The quantity and quality of phenol compounds depends on both the plant and the technology of grape processing. Their high chemical reactivity makes them participate in chemical processes, especially oxido-reduction and condensation. At the same time, these substances have antioxidant qualities that delay the oxidation of wine components. Phenolic compounds also have interesting biological properties. Recent medical research attributed to phenolic compounds from grapes, juice and wines, especially red ones, remarkable sanogenic qualities, due in particular to their antioxidant action when it comes to polyphenols, cardiovascular protection, antiviral, antihistaminic, anti-cancer, anti-inflammatory, etc.This study analyses the management of various maceration-fermentation processes and their influence on the antioxidant capacity of some wines from Iasi vineyard, but also their correlation with specific phenol compounds. The management of winemaking technologies can produce wines with high antioxidant potential, a plus for an increasingly demanding consumer.

Studies on high chemical reactivity of nano-NaH

2007 ◽  
Vol 2 (4) ◽  
pp. 403-406
Author(s):  
Yinheng Fan ◽  
Yunling Zou ◽  
Dan Jin ◽  
Qiang Wu ◽  
Tong Liu ◽  
...  
Keyword(s):  
Chemical Reactivity ◽  
High Chemical ◽  
High Chemical Reactivity

Recent Developments Using Phosphorlts-Containing Diol as a Reactive Combustion Modifier for Rigid Polyltrethane Foams-Part Iii

1984 ◽  
Vol 2 (6) ◽  
pp. 439-453 ◽  
Author(s):  
F.T. Lee ◽  
J. Green ◽  
R.D. Gibilisco
Keyword(s):  
Chemical Reactivity ◽  
Cost Effective ◽  
Class Ii ◽  
Class I ◽  
High Chemical ◽  
Phosphorus Containing ◽  
Recent Developments ◽  
High Chemical Reactivity

FR-D, a new phosphorus-containing diol has, previously, been demonstrated to be an effective combustion modifier in producing pour-in-place rigid urethane foams meeting ASTM E-84 Class I and Class II requirements. Continued developmental efforts led to optimized Class I and Class II foams which contain significantly less amount of combustion modifiers and are thus more cost effective than those reported earlier. FR-D is also suitable for spray foam applications because of its high chemical reactivity and high hydroxy number (#OH = 460). In this paper, recently developed FR-D based Class I and Class II pour as well as spray formulations along with their processing characteristics, E-84 data and foam physicals are discussed.

Sign in / Sign up

Export Citation Format

Share Document