Advanced Search
Display options
Filter resources
Text Availability
Article type
Publication date
Species
Language
Sex
Age
Showing 1 to 12 of 280 entries
Sorted by: Best Match Show Resources per page
Documenting collections: cornerstones for more history of science in museums

museums

Gessner S.
GSID: oa8NskwEKbYJ
MC Lourenço, S Gessner - Science & Education, 2014 - Springer

… Council of Museums (ICOM), the largest worldwide UNESCO-affiliated association of museums and museum professionals, comprises … In this paper, and unless clearly stated, the term ‘museums of science’ is meant to apply to museums with historical collections. Museums...

Nutrient addition accelerates leaf breakdown in an alpine springbrook.

Oecologia

Robinson CT, Gessner MO.
PMID: 28308380
Oecologia. 2000 Feb;122(2):258-263. doi: 10.1007/PL00008854.

This study assessed the effect of nutrient enrichment on organic matter breakdown in an alpine springbrook, using alder leaf packs to which phosphorus and nitrogen were added in the form of slow-release fertilizer briquettes. The breakdown of leaf packs...

Flow Cytometric Assessment of Bacterial Abundance in Soils, Sediments and Sludge.

Frontiers in microbiology

Frossard A, Hammes F, Gessner MO.
PMID: 27379043
Front Microbiol. 2016 Jun 14;7:903. doi: 10.3389/fmicb.2016.00903. eCollection 2016.

Bacterial abundance is a fundamental measure in microbiology, but its assessment is often tedious, especially for soil, and sediment samples. To overcome this limitation, we adopted a time-efficient flow-cytometric (FCM) counting method involving cell detachment and separation from matrix...

Evaluation of instruction.

Science (New York, N.Y.)

Gessner PK.
PMID: 17730938
Science. 1973 Jul 20;181(4096):252. doi: 10.1126/science.181.4096.252.

In "Evaluation of instruction" by Peter K. Gessner [11 May 1973, p. 569], sentence 4, paragraph 2, column 1, should read as follows: "It would seem likely that such an evaluative device would not differentiate between students able to...

Effect of sonication on the particle size of montmorillonite clays.

Journal of colloid and interface science

Poli AL, Batista T, Schmitt CC, Gessner F, Neumann MG.
PMID: 18572177
J Colloid Interface Sci. 2008 Sep 15;325(2):386-90. doi: 10.1016/j.jcis.2008.06.016. Epub 2008 Jun 13.

This paper reports on the effect of sonication on SAz-1 and SWy-1 montmorillonite suspensions. Changes in the size of the particles of these materials and modifications of their properties have been investigated. The variation of the particle size has...

Planck's Principle.

Science (New York, N.Y.)

Hull DL, Tessner PD, Diamond AM.
PMID: 17807228
Science. 1978 Nov 17;202(4369):717-23. doi: 10.1126/science.202.4369.717.

Two views about the Darwinian revolution are tested: that nearly all scientists in Great Britain had been converted to a belief in the evolution of species within 10 years after the publication of the Origin of Species, and that...

Isopropyllithium diamine adducts: from a non symmetric aggregate to monomeric i-PrLi.(1R,2R)-N,N,N',N'-tetraethylcyclohexane-1,2-diamine.

Chemical communications (Cambridge, England)

Strohmann C, Gessner VH, Damme A.
PMID: 18633496
Chem Commun (Camb). 2008 Aug 07;(29):3381-3. doi: 10.1039/b804855j. Epub 2008 May 20.

By means of isopropyllithium crystal structures, the transition from dimeric (i-PrLi.TMEDA)2 (4) to monomeric i-PrLi.(R,R)-TECDA (6) via the non-symmetric aggregate [(i-PrLi)3.(TEEDA)2] (5) is shown, depending on the steric demand of the ligand.

Unexpected direct dilithiation of a prochiral phosphine borane.

Chemical communications (Cambridge, England)

Gessner VH, Dilsky S, Strohmann C.
PMID: 20485825
Chem Commun (Camb). 2010 Jul 14;46(26):4719-21. doi: 10.1039/c0cc00130a. Epub 2010 May 20.

Dimethylphenylphosphine borane is readily deprotonated at both methyl groups with tBuLi and (R,R)-TMCDA to the corresponding dilithiated Lewis base adduct, featuring an intriguing structural motif with stabilising Li-H interactions.

Crystal structures of n-BuLi adducts with (R,R)-TMCDA and the consequences for the deprotonation of benzene.

Journal of the American Chemical Society

Strohmann C, Gessner VH.
PMID: 18686951
J Am Chem Soc. 2008 Sep 03;130(35):11719-25. doi: 10.1021/ja8017187. Epub 2008 Aug 08.

Combinations of organolithium compounds and diamine bases have become a powerful tool in synthetic chemistry. Because of the structure-reactivity relationship, the elucidation of reaction mechanisms of these reagents is strongly connected with the structural determination of intermediate species. In...

Applications and methods utilizing the Simple Semantic Web Architecture and Protocol (SSWAP) for bioinformatics resource discovery and disparate data and service integration.

BioData mining

Nelson RT, Avraham S, Shoemaker RC, May GD, Ware D, Gessler DD.
PMID: 20525377
BioData Min. 2010 Jun 04;3(1):3. doi: 10.1186/1756-0381-3-3.

BACKGROUND: Scientific data integration and computational service discovery are challenges for the bioinformatic community. This process is made more difficult by the separate and independent construction of biological databases, which makes the exchange of data between information resources difficult...

Selective dehydrocoupling of phosphines by lithium chloride carbenoids.

Journal of the American Chemical Society

Molitor S, Becker J, Gessner VH.
PMID: 25322474
J Am Chem Soc. 2014 Nov 05;136(44):15517-20. doi: 10.1021/ja509381w. Epub 2014 Oct 21.

The development of a simple, transition-metal-free approach for the formation of phosphorus-phosphorus bonds through dehydrocoupling of phosphines is presented. The reaction is mediated by electronically stabilized lithium chloride carbenoids and affords a variety of different diphosphines under mild reaction...

Mechanistic insight into stereoselective carbolithiation.

Chemistry (Weinheim an der Bergstrasse, Germany)

Gessner VH, Koller SG, Strohmann C, Hogan AM, O'Shea DF.
PMID: 21294193
Chemistry. 2011 Mar 01;17(10):2996-3004. doi: 10.1002/chem.201000814. Epub 2011 Feb 03.

This article addresses the mechanistic features of asymmetric carbolithiation of β-methylstyrenes. While often the presence of functional groups is required to obtain high enantioselectivities in carbolithiation reactions, simple β-methylstyrene also gives high selectivities in (-)-sparteine-mediated addition of alkyl lithium...

Showing 1 to 12 of 280 entries