Homoconjugation in Triptycenes: An Inquiry Through Photochromism

2022 ◽  
Author(s):  
Kanyashree Jana ◽  
J. Narasimha Moorthy
Keyword(s):  
Contentious Issue ◽  
Benzene Rings

The spatial disposition of three benzene rings in triptycene permits through-space overlap of the orbitals of fused benzene sp2 carbons, leading to ‘homoconjugation’; the latter is a contentious issue in...

Integrative physiological assessment of cerebral hemodynamics and metabolism in acute ischemic stroke

2021 ◽  
pp. 0271678X2110337
Author(s):  
Jui-Lin Fan ◽  
Ricardo C Nogueira ◽  
Patrice Brassard ◽  
Caroline A Rickards ◽  
Matthew Page ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Cerebral Autoregulation ◽  
Cerebral Perfusion ◽  
Prognostic Markers ◽  
Important Determinant ◽  
Stroke Care ◽  
Contentious Issue ◽  
Ischemic Tissue ◽  
Physiological Assessment

Restoring perfusion to ischemic tissue is the primary goal of acute ischemic stroke care, yet only a small portion of patients receive reperfusion treatment. Since blood pressure (BP) is an important determinant of cerebral perfusion, effective BP management could facilitate reperfusion. But how BP should be managed in very early phase of ischemic stroke remains a contentious issue, due to the lack of clear evidence. Given the complex relationship between BP and cerebral blood flow (CBF)—termed cerebral autoregulation (CA)—bedside monitoring of cerebral perfusion and oxygenation could help guide BP management, thereby improve stroke patient outcome. The aim of INFOMATAS is to ‘ identify novel therapeutic targets for treatment and management in acute ischemic stroke’. In this review, we identify novel physiological parameters which could be used to guide BP management in acute stroke, and explore methodologies for monitoring them at the bedside. We outline the challenges in translating these potential prognostic markers into clinical use.

scholarly journals On detour index of cycloparaphenylene and polyphenylene molecular structures

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
S. Prabhu ◽  
Y. Sherlin Nisha ◽  
M. Arulperumjothi ◽  
D. Sagaya Rani Jeba ◽  
V. Manimozhi
Keyword(s):  
Atomic System ◽  
Molecular Structures ◽  
Topological Descriptors ◽  
Covalent Bonds ◽  
Atomic Structures ◽  
Topological Descriptor ◽  
Structure Activity ◽  
Mathematical Correlation ◽  
Benzene Rings ◽  
Unique Method

AbstractCycloparaphenylene is a particle that comprises a few benzene rings associated with covalent bonds in the para positions to frame a ring-like structure. Similarly, poly (para-phenylenes) are macromolecules that include benzenoid compounds straightforwardly joined to each other by C–C bonds. Because of their remarkable architectural highlights, these structures have fascinated attention from numerous vantage focuses. Descriptors are among the most fundamental segments of prescient quantitative structure-activity and property relationship (QSAR/QSPR) demonstrating examination. They encode chemical data of particles as quantitative numbers, which are utilized to create a mathematical correlation. The nature of a predictive model relies upon great demonstrating insights, yet additionally on the extraction of compound highlights. To a great extent, Molecular topology has exhibited its adequacy in portraying sub-atomic structures and anticipating their properties. It follows a two-dimensional methodology, just thinking about the interior plan, including molecules. Explicit subsets speak the design of every atom of topological descriptors. When all around picked, these descriptors give a unique method of describing an atomic system that can represent the most significant highlights of the molecular structure. Detour index is one such topological descriptor with much application in chemistry, especially in QSAR/QSPR studies. This article presents an exact analytical expression for the detour index of cycloparaphenylene and poly (para-phenylene).

Exclusive jurisdiction clauses in international trust deeds

Legal Studies ◽  
2021 ◽  
pp. 1-18
Author(s):  
Ardavan Arzandeh
Keyword(s):  
Common Law ◽  
Privy Council ◽  
Exclusive Jurisdiction ◽  
Contentious Issue

Abstract Jurisdiction clauses commonly feature in high-value international contracts. Recently, these clauses are also increasingly utilised in international trust instruments. At common law, a contentious issue vis-à-vis exclusive jurisdiction clauses in trust deeds has been whether they should be upheld in the same way as their contractual equivalents. In obiter remarks in Crociani v Crociani, in 2014, the Privy Council stated that these clauses should be afforded less weight in trusts than in contracts. However, as this paper seeks to demonstrate, the reasoning underpinning the treatment of exclusive jurisdiction clauses in trust deeds in this manner is questionable. The paper's key contention is that exclusive jurisdiction clauses in trust deeds should be enforced in the same way as those in contracts. Accordingly, an exclusive jurisdiction clause in a trust instrument should be upheld, unless the claimant can establish a strong cause why the matter should be litigated elsewhere.

scholarly journals The Rejection of Constitutional Incrementalism in Nepal's Federalisation

2018 ◽  
Vol 46 (4) ◽  
pp. 521-540
Author(s):  
Mara Malagodi
Keyword(s):  
Eighteenth Century ◽  
Collective Identity ◽  
Constitutional Amendment ◽  
Divided Societies ◽  
Contentious Issue ◽  
Post Conflict ◽  
Late Eighteenth Century ◽  
Institutional Choices ◽  
The Relationship ◽  
Constitution Making

The relationship between federalism and identity was the single most contentious issue in the drafting of Nepal's 2015 Constitution, and remains an embattled feature of the country's post-conflict constitutional settlement. This article explains why ‘constitutional incrementalism'—the innovative constitution-making strategy for deeply divided societies theorised by Hanna Lerner—was ultimately (and wisely) rejected in Nepal's federalisation process. Historically a unitary state since its creation in the late eighteenth century, Nepal committed itself to federal restructuring in 2007, but profound disagreements endured over the set of institutional choices concerning the features of Nepal's federal arrangements throughout the constitution-making process (2008–15). Constitutional incrementalism with its emphasis on deferral, ambiguity and contradiction was thought of in some quarters as a pragmatic and instrumental way out of Nepal's political impasse. In the end, the 2015 Constitution expressly named the provinces (even if by just using numbers) and demarcated their boundaries already at the time of its promulgation. Any changes to this framework can only take place by way of constitutional amendment. This article explains why the incrementalist approach was rejected in Nepal's federalisation process, and reflects on the conditions under which constitutional incrementalism may succeed in societies that present profound disagreements over the collective identity of the polity.

scholarly journals Beyond a Dichotomous Understanding of Online Anonymity: Bridging the Macro and Micro Level

2021 ◽  
pp. 136078042110197
Author(s):  
Lina Eklund ◽  
Emma von Essen ◽  
Fatima Jonsson ◽  
Magnus Johansson
Keyword(s):  
Empirical Studies ◽  
Online Auctions ◽  
Future Research ◽  
Plural Form ◽  
Contentious Issue ◽  
Online Anonymity ◽  
Complex Process ◽  
Theoretical Synthesis ◽  
Micro Level ◽  
Different Levels

Anonymity on the Internet is a contentious issue; by some seen as an important freedom to be protected, while others argue for increased identification to protect groups at risk of exploitation. The debate reflects a dichotomous view of online anonymity; you are, or you are not anonymous. However, anonymity is a complex process played out on different levels and defined by various actors. While empirical studies show this, theoretical synthesis is lacking. This essay provides perspective on anonymity online by comparing two critical cases, online auctions and online gaming, we corroborate results from a 4-year interdisciplinary project with researchers from sociology, economics, and computer and system sciences. We argue that one should talk about anonymities in plural form, as online anonymity is not a state but a relational process. We put forth a conceptual model, which unpacks online anonymity as interdependent macro structures – legal, commercial, and technological – and micro/meso facets – factual, social group, and physical – to be used in future research.

Effect of solvent media and condensed benzene rings on thermochemical behaviour of dibenzo-18-crown-6 in solution

2009 ◽  
Vol 98 (2) ◽  
pp. 547-552 ◽  
Author(s):  
Vladimir P. Barannikov ◽  
Sabir S. Guseynov ◽  
Anatoliy I. Vyugin
Keyword(s):  
Effect Of Solvent ◽  
Benzene Rings

scholarly journals 3-(2,4-Dichlorophenyl)-5-(4-fluorophenyl)-2-phenyl-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine

2012 ◽  
Vol 68 (6) ◽  
pp. o1923-o1923
Author(s):  
Ju Liu ◽  
Zhi-Qiang Cai ◽  
Yang Wang ◽  
Yu-Li Sang ◽  
Li-Feng Xu
Keyword(s):  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Crystal Packing ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Compound C ◽  
Benzene Rings ◽  
Planar Systems

In the title compound, C25H13Cl2F4N3, there are four planar systems, viz. three benzene rings and a pyrazolo[1,5-a]pyrimidine system [r.m.s. deviation = 0.002 Å]. The dihedral angle between the dichlorophenyl ring and the unsubstituted phenyl ring is 69.95 (5)°, while that between the fluorophenyl ring and the unsubstituted phenyl ring is 7.97 (10)°. The crystal packing is dominated by van der Waals interactions. A Cl...Cl interaction of 3.475 (3) Å also occurs.

scholarly journals 2-[N-(4-{4-[(2-Hydroxy-5-methoxybenzylidene)amino]benzyl}phenyl)carboximidoyl]-4-methoxyphenol

2012 ◽  
Vol 68 (4) ◽  
pp. o1141-o1141
Author(s):  
Ali Ourari ◽  
Lotfi Baameur ◽  
Gilles Bouet ◽  
Magali Allain
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Dihedral Angle ◽  
Twofold Axis ◽  
Benzene Rings

In the title Schiff base, C29H26N2O4, the complete molecule is generated by a crystallographic twofold axis and is V-shaped. The planes of the benzene rings of the central diphenylmethane unit make a dihedral angle of 78.11 (4)° while adjacent benzene and 5-methoxysalicylidene rings are twisted with respect to each other by a dihedral angle of 11.84 (8)°. The Schiff base is in the enol–imino form and an intramolecular O—H...N hydrogen bond is observed.

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