نتایج جستجو برای: polycyclic

تعداد نتایج: 12913  

Journal: :Journal of Group Theory 2009

Journal: :Beiträge zur Tabakforschung / Contributions to Tobacco Research 1965

Journal: :Accounts of chemical research 2015
Melissa Ball Yu Zhong Ying Wu Christine Schenck Fay Ng Michael Steigerwald Shengxiong Xiao Colin Nuckolls

CONSPECTUS: This Account describes a body of research in the design, synthesis, and assembly of molecular materials made from strained polycyclic aromatic molecules. The strain in the molecular subunits severely distorts the aromatic molecules away from planarity. We coined the term "contorted aromatics" to describe this class of molecules. Using these molecules, we demonstrate that the curved ...

Journal: :Designs, Codes and Cryptography 2022

Polycyclic codes are a generalization of cyclic and constacyclic codes. Even though they have been known since 1972 received some attention more recently, there not many studies on polycyclic This paper presents an in-depth investigation associated with trinomials. Our results include number facts about trinomials, properties codes, new quantum derived from We also state several conjectures pol...

Journal: :Physical chemistry chemical physics : PCCP 2008
Jonas Jusélius Dage Sundholm

Magnetically induced current densities have been calculated for a series of hydrocarbons consisting of hexadehydro[12]annulene rings alternatingly fused with benzenes. The calculations show that all molecular rings of the studied molecules sustain paramagnetic ring currents. The new class of molecules is therefore coined polycyclic antiaromatic hydrocarbons (PAAH).

1992
Geraldo Lino de Campos

The Asynchronous Polycyclic Architecture (APA) is a new processor design for numerically intensive applications. APA resembles the VLIW architecture, in that it provides independent control and concurrent operation of low-level functional units within the processor. The main innovations of APA are the provision for multiple threads of control within each processor, the clustering of functional ...

2006
Dominique Laurent Francine Baumann Anne Gaelle Benoit Alain Mortelecqe Narong Nitatpattana Isabelle Desvignes Cécile Debitus Manola Laille Jean-Paul Gonzalez Eliane Chungue

The virucidal and antiviral photoactivities of three compounds, hypericin, tetrabromohypericin and gymnochrome B, were evaluated against dengue viruses. All the three products were active, and both the virucidal and antiviral activities were enhanced by light. Gymnochrome B was more potent than hypericin and tetrabromohypericin. The presence of the side chains on the hypericin core of gymnochro...

2005
M. Walczak W. Donderski Z. Mudryk P. Skorczewski

The present paper provides results of a study on heterotrophic bacteria occurrence and quantity in the biofilm and subsurface water of lake Jeziorak Maty. Degradation of several polycyclic aromatic hydrocarbons (PAH's) (anthracene, naphthalene) by neustonic and planktonic bacteria have been examined. It has been discovered that some aromatic hydrocarbons were better decomposed by neustonic bact...

2011
Alan J. Cain

The direct product of a free group and a polycyclic group is known to be coherent. This paper shows that every finitely generated subsemigroup of the direct product of a virtually free group and an abelian group admits a finite Malcev presentation. (A Malcev presentation is a presentation of a special type for a semigroup that embeds into a group. A group is virtually free if it contains a free...

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