scholarly journals Supramolecular chiroptical switching of helical-sense preferences through the two-way intramolecular transmission of a single chiral source

2018 ◽  
Vol 16 (7) ◽  
pp. 1167-1171 ◽  
Author(s):  
Ryo Katoono ◽  
Keiichi Kusaka ◽  
Yuki Tanaka ◽  
Kenshu Fujiwara ◽  
Takanori Suzuki
Keyword(s):  
Simple Molecule

Complexation-induced reversal of helical-sense preferences is demonstrated with a simple molecule with a pair of exciton-coupled chromophores.

scholarly journals Recent Advances in Metal Catalyst Design for CO2 Hydroboration to C1 Derivatives

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 58
Author(s):  
Sylwia Kostera ◽  
Maurizio Peruzzini ◽  
Luca Gonsalvi
Keyword(s):  
Transition Metals ◽  
Chemical Synthesis ◽  
Building Block ◽  
Co2 Reduction ◽  
Main Group ◽  
Catalyst Design ◽  
Metal Catalyst ◽  
Simple Molecule ◽  
Recent Advances ◽  
Renewable Feedstock

The use of CO2 as a C1 building block for chemical synthesis is receiving growing attention, due to the potential of this simple molecule as an abundant and cheap renewable feedstock. Among the possible reductants used in the literature to bring about CO2 reduction to C1 derivatives, hydroboranes have found various applications, in the presence of suitable homogenous catalysts. The current minireview article summarizes the main results obtained since 2016 in the synthetic design of main group, first and second row transition metals for use as catalysts for CO2 hydroboration.

Modelling the emission of HNCO towards IRAS16293-2422 using a new set of collisional coefficients

2017 ◽  
Vol 13 (S332) ◽  
pp. 435-439
Author(s):  
A. Hernández-Gómez ◽  
E. Sahnoun ◽  
E. Caux ◽  
L. Wiesenfeld ◽  
L. Loinard ◽  
...  
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Energy Surface ◽  
Isocyanic Acid ◽  
Rotational Excitation ◽  
Simple Molecule ◽  
Prebiotic Molecule ◽  
Low Mass

AbstractIsocyanic acid (HNCO) is a simple molecule containing the four main atoms essential for life and can be considered as a prebiotic molecule. To model the HNCO emission in the IRAS16293-2422 class 0 low-mass protostar, we used a new set of HNCO collisional coefficients with ortho-H2and para-H2, computed from a set of rotational excitation quenching rates between HNCO and H2based on a novel potential energy surface for the rigid molecules interactions. We present here the HNCO Potential Energy Surface used to compute this new set of collisional coefficients and the result of the IRAS16293-2422 HNCO spectrum modelling using them.

A Simple Molecule-Based Octastate Switch

2014 ◽  
Vol 136 (39) ◽  
pp. 13510-13513 ◽  
Author(s):  
György Szalóki ◽  
Guillaume Sevez ◽  
Jerôme Berthet ◽  
Jean-Luc Pozzo ◽  
Stéphanie Delbaere
Keyword(s):  
Simple Molecule

scholarly journals Nitric Oxide and Respiratory Helminthic Diseases

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Antonio Muro ◽  
José-Luís Pérez-Arellano
Keyword(s):  
Nitric Oxide ◽  
Mammalian Cells ◽  
Biological Activities ◽  
Human Infection ◽  
Biological Role ◽  
No Production ◽  
Biological Cycle ◽  
Simple Molecule ◽  
Respiratory Pathology

Nitric oxide (NO) is a very simple molecule that displays very important functions both in helminths (mainly those involved in respiratory pathology) and in mammalian hosts. In this paper we review four issues related to interaction of NO and lung helminthic diseases. Firstly, we evaluated data available on the NO synthesis and release by helminths and their biological role. Next, we summarized the effect of antigens obtained from different phases of the biological cycle on NO production by host mammalian cells (mainly from human sources). Thirdly, we revised the evaluation of NO on the biological activities and/or the viability of respiratory helminths. Lastly, the deleterious consequences of increased production of NO during helminthic human infection are detailed.

scholarly journals Pyruvate kinase M2: A simple molecule with complex functions

2019 ◽  
Vol 143 ◽  
pp. 176-192 ◽  
Author(s):  
Mohammed Alquraishi ◽  
Dexter L. Puckett ◽  
Dina S. Alani ◽  
Amal S. Humidat ◽  
Victoria D. Frankel ◽  
...  
Keyword(s):  
Pyruvate Kinase ◽  
Pyruvate Kinase M2 ◽  
Simple Molecule ◽  
Complex Functions

scholarly journals Boric acid: a simple molecule of physiologic, therapeutic and prebiotic significance

2015 ◽  
Vol 87 (2) ◽  
pp. 155-162 ◽  
Author(s):  
Birgul Zumreoglu-Karan ◽  
Dursun Ali Kose
Keyword(s):  
Boric Acid ◽  
Acid Synthesis ◽  
Weak Acid ◽  
Complexing Agent ◽  
Hydroxy Acids ◽  
Chelate Complexes ◽  
Simple Molecule ◽  
Donor Acceptor ◽  
Catalytic Role

AbstractBoric acid, H3BO3, is a weak acid and at physiological pH is in the form of an uncharged small molecule. Behaving as a Lewis acid, it forms complexes with amino- and hydroxy acids, carbohydrates, nucleotides and vitamins through electron donor-acceptor interactions. These interactions are believed to be beneficial for human health. Synthetic bis-chelate complexes of boric acid with organic biomolecules are therefore considered for nutritional and/or pharmaceutical applications. The use of boric acid for BNCT has gained attention due to the short biological half-life, solubility, plasma circulation and the non-selective soft tissue accumulation properties of this simple molecule. Complexation of boric acid with sugars is of particular importance in understanding the role of boron as a carrier for nucleotides and carbohydrates. A potential and catalytic role of boric acid in peptide and nucleic acid synthesis and in the stabilization of sugar molecules by acting as a complexing agent have been demonstrated. Its possible role as a phosphorylation chaperone in a prebiotic world has been recently suggested. This contribution reviews the highlights in the physiologic, therapeutic and prebiotic significance of boric acid in the last decade.

scholarly journals Glucose: A Simple Molecule That Is Not Simple to Quantify

2007 ◽  
Vol 53 (12) ◽  
pp. 2040-2041 ◽  
Author(s):  
Raymond Gambino
Keyword(s):  
Simple Molecule

scholarly journals Ibuprofen: Synthesis, production and properties

2003 ◽  
Vol 57 (5) ◽  
pp. 199-214
Author(s):  
Dusan Mijin ◽  
Milena Stankovic ◽  
Slobodan Petrovic
Keyword(s):  
Structural Complexity ◽  
Pharmaceutical Products ◽  
Potential Production ◽  
Inflammatory Drug ◽  
Academic Scientists ◽  
Simple Molecule ◽  
Production Processes ◽  
The World ◽  
Anti Inflammatory ◽  
Synthetic Approaches

Since its introduction in 1969, ibuprofen has become one of the most common painkillers in the world. Ibuprofen in an NSAID (non-steroidal anti-inflammatory drug) and like other drugs of its class it possesses analgetic, antipyretic and anti-inflammatory properties. While ibuprofen is a relatively simple molecule, there is still sufficient structural complexity to ensure that a large number of different synthetic approaches are possible. Since the introduction of pharmaceutical products containing ibuprofen, industrial and academic scientists have developed many potential production processes. This paper describes the history, synthesis and production, as well as the properties and stability of ibuprofen.

1,10-Phenanthroline platinum(ii) complex: a simple molecule for efficient G-quadruplex stabilization

2010 ◽  
Vol 39 (31) ◽  
pp. 7214 ◽  
Author(s):  
Jin-Tao Wang ◽  
Xiao-Hui Zheng ◽  
Qing Xia ◽  
Zong-Wan Mao ◽  
Liang-Nian Ji ◽  
...  
Keyword(s):  
Simple Molecule ◽  
G Quadruplex
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