منابع مشابه
Coexistence in Female‐Bonded Primate Groups
With few exceptions, diurnal primates are distributed in large social groups that are spatially and temporally coherent. The goal of primate socioecology since 1960s has been to understand what drives and structures this distribution. Whereas initial syntheses (Crook and Gartlan, 1966; Eisenberg et al., 1972) focused on males, this emphasis gave way during the 1970s to an increasingly articulat...
متن کاملPolymers with Multiple Hydrogen-Bonded End Groups and Their Blends
A new strategy for synthesizing well-defined, chain-end-functionalized polymers containing multiple hydrogen-bonding (MHB) groups capable of heterodimerization in both solution and the melt has been developed. Two complementary MHB systems were chosen for initial studies: 2-ureido-4[1H]-pyrimidinone (UPy) and 2,7diamido-1,8-naphthyridine (Napy) and ATRP initiators containing either UPy or Napy ...
متن کاملStatics and dynamics of free and hydrogen-bonded OH groups at the air/water interface.
We use classical atomistic molecular dynamics simulations of two water models (SPC/E and TIP4P/2005) to investigate the orientation and reorientation dynamics of two subpopulations of OH groups belonging to water molecules at the air/water interface at 300 K: those OH groups that donate a hydrogen bond (called "bonded") and those that do not (called "free"). Free interfacial OH groups reorient ...
متن کاملHydrogen-bonded self-assemblies in a polychlorotriphenylmethyl radical derivative substituted with six meta-carboxylic acid groups.
The synthesis, self assembly and magnetic properties of a polychlorotriphenylmethyl radical, substituted with six meta-carboxylic groups, are reported showing that radical-radical hydrogen bonds in the solid state yield to very weak intermolecular ferromagnetic interactions.
متن کاملSpacer-Length-Dependent Association in Polymers with Multiple-Hydrogen-Bonded End Groups
Herein, we investigate the influence of spacer length on the homoassociation and heteroassociation of endfunctionalized hydrogen-bonding polymers based on poly(nbutyl acrylate). Two monofunctional ureido-pyrimidinone (UPy) end-functionalized polymers were prepared by atom transfer radical polymerization using self-complementary UPyfunctional initiators that differ in the spacer length between t...
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ژورنال
عنوان ژورنال: Journal of the Mathematical Society of Japan
سال: 1961
ISSN: 0025-5645
DOI: 10.2969/jmsj/01320136