Probing the space-time structure of multiparticle production processes

It is shown that the models for highenergy multiparticle production in which the notion of a hadronicformation time plays a central role are in disagreement with recently published compilations of the rescatter probabilities in 100 GeV/c \(\bar p\) d and 200 GeV/c p d collisions.     

Direct observation of a self-assembled monolayer of heptyl xanthate at the germanium/water interface: a polarized FTIR study

The adsorption of heptyl xanthate on germanium has been studied by the attenuated total reflection (ATR) technique. Polarized infrared light was used in situ to determine the average orientation of the alkyl chain in heptyl xanthate adsorbed at the germanium/solution interface. Spectra reveal the formation of closely packed xanthate ions with the alkyl chains in the all-trans conformation. The average tilt angle of the alkyl chains of heptyl xanthate was approximately 47 degrees from the surface normal.     

A new diquark model for deep inelastic structure functions

The bulk of data from deep inelasticep, eD, μp, μN, νp and νN scattering is fitted with a new diquark model of nucleons. The proton is found to be mostly in au(ud) ₀ state, where the (ud)₀ diquark has spin and isospin zero. There is hence no trace ofSU(6) symmetry among diquarks in nucleons.     

Precision determination of the fine structure of the 4d state in sodium using level crossing spectroscopy

The 4d state in Na, which recently has been studied in several two-photon absorption experiments, was investigated by level-crossing spectroscopy. For the fine structure splitting we find the value 1028.3(6) MHz.     

The surface tension of concentrated aqueous solutions of 1.1-electrolytes measured by means of Wilhelmy and laser light scattering methods

Surface tension measurements were made on concentrated (<4 moles/kg) aqueous solutions of the following 1.1-electrolytes: KF, KCl, KI, HCl, and HNO₃. Two different measurement techniques were used: the Wilhelmy slide method and a method based on the scattering of laser light by small amplitude liquid surface waves. The surface tension determined by the two methods agrees within ±0.5% and for each solution it is found to vary almost linearly with concentration. The shear viscosity was also measured for these solutions by means of the laser method and a standard flow viscosimeter. The measured values were found to agree within ±5%.     

Average-optimal string matching

The exact string matching problem is to find the occurrences of a pattern of length m from a text of length n symbols. We develop a novel and unorthodox filtering technique for this problem. Our method is based on transforming the problem into multiple matching of carefully chosen pattern subsequences. While this is seemingly more difficult than the original problem, we show that the idea leads to very simple algorithms that are optimal on average. We then show how our basic method can be used to solve multiple string matching as well as several approximate matching problems in average optimal time. The general method can be applied to many existing string matching algorithms. Our experimental results show that the algorithms perform very well in practice.     

13C assignments of the carbon atoms in the aromatic rings of lignin model compounds of the arylglycerol beta-aryl ether type

The 13C NMR signals from the aromatic ring carbons in a series of lignin model compounds of the arylglycerol beta-aryl ether type in DMSO solution have been assigned. The model compounds investigated are representative of the erythro and threo forms of differently substituted arylglycerol beta-aryl ethers.     

Multi-way decomposition of projected spectra obtained in protein NMR

Multidimensional nuclear magnetic resonance spectroscopy is a highly versatile tool in protein research. Experimental limitations prohibit spectra with ≥ 5 dimensions. However, similar information can be obtained by recording 2-dimensional projections. A decomposition-based approach for analyzing projections is presented and applied to a protein. The resulting resonance identification is a prerequisite for further characterization of structure, dynamics and interactions of proteins. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)     

Targeted acetylation of wood: a tool for tuning wood-water interactions

Cellulose - Wood is an increasingly important material in the sustainable transition of societies worldwide. The performance of wood in structures is intimately tied to the presence of moisture in...     

A new indication of diquarks in baryons

In data from 100 GeV/c \(\bar p\) d, 200 GeV/cpd and 200 GeV/cπ ^? d collisions there is evidence that the probability for a double-collisiondecreases slowly with increasing number of hadrons produced in the first projectile-nucleon collision. We argue that the presence of diquarks in baryons is the only plausible explanation of such an effect.