bluuebunny/crossref_metadata_2025_split huggingface dataset:
β‐amino acid analogs of an insect neuropeptide feature potent bioactivity and resistance to peptidase hydrolysis
Authors: Zubrzak Pawel , Williams Howard , Coast Geoffrey M. , Isaac R. Elwyn , Reyes‐Rangel Gloria , Juaristi Eusebio , Zabrocki Janusz , Nachman Ronald J. 
Published: November 2006

AbstractInsect neuropeptides of the insect kinin class share a common C‐terminal pentapeptide sequence F1X12X23W4G5‐NH2 (X23 = P, S, A) and regulate such critical physiological processes as water balance and digestive enzyme release. Analogs of the insect kinin class, in which the critical residues of F1, P3, and W4 were replaced with β3‐amino acid or their β2‐homo‐amino acid variants, have been synthesized by the solid phase peptide strategy. The resulting single‐ and double‐replacement analogs were evaluated in an insect diuretic assay and enzyme digestion trials. Analogs modified in the core P3 position produce a potent and efficacious diuretic response that is not significantly different from that obtained with the endogenous achetakinin peptides. The analogs also demonstrate enhanced resistance to hydrolysis by ACE and NEP, endopeptidases that inactivate the natural insect neuropeptides. This paper describes the first instance of β‐amino acids analogs of an arthropod peptide that demonstrate significant bioactivity and resistance to peptidase degradation. © 2006 Wiley Wiley Periodicals, Inc. Biopolymers (Pept Sci) 88:76–82, 2007.This article was originally published online as an accepted preprint. The “Published Online”date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com.
Randomized clinical trial comparing feeding jejunostomy with nasoduodenal tube placement in patients undergoing oesophagectomy
Authors: Han-Geurts I J M , Hop W C , Verhoef C , Tran K T C , Tilanus H W 
Published: November 2006

Abstract

Background
Feeding jejunostomy is frequently performed in patients undergoing oesophageal surgery, but can lead to serious complications. This prospective randomized trial compared the efficacy and complications of feeding jejunostomy with those of nasoduodenal tube feeding in oesophageal surgery.

Methods
Over an 18-month period, 150 consecutive patients undergoing oesophageal resection were randomized to participate in the trial. Enteral access was by jejunostomy in 79 patients and by nasoduodenal tube in 71. Enteral feeding was started on the first day after surgery.

Results
Full enteral feeding took 3 days to be established in both groups. Minor catheter-related complications occurred in 28 patients (35 per cent) in the jejunostomy group, and in 21 (30 per cent) in the nasoduodenal group (P = 0·488). One patient had jejunostomy leakage that required reoperation. Enteral nutrition was given for a median of 11 days in the jejunostomy group and for 10 days in the nasoduodenal group. Nine patients who had a jejunostomy and five with a nasoduodenal tube did not tolerate full enteral feeding (P = 0·411).

Conclusion
Nasoduodenal tube feeding is safe and efficient after oesophageal resection.
The oxymoron of ‘sustainable oil production’: the case of the Norwegian oil industry
Authors: Ihlen Øyvind 
Published: November 2006

AbstractMany oil companies have adopted the concept of sustainable development and claim that their production is sustainable. This might seem odd given that the oil industry depletes a non‐renewable resource and that oil production also contributes to climate change. This paper analyses how the industry attempts to resolve this paradox, using the Norwegian oil industry as a case study. It is demonstrated how four rhetorical operations are used. By employing the topic of definition, the industry argues that it is sustainable because it (1) strives to cut its emissions and (2) manages oil resources with a long‐term perspective until such time as technology will provide solutions. The industry then uses the topic of comparison to (3) discredit other energy sources as ‘unrealistic’ options and (4) compare the production in Norway with more polluting oil production elsewhere. Understanding this type of rhetoric is crucial for validating or criticizing the sustainability claims of the industry. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment.
Myriad: scalable VR via peer‐to‐peer connectivity, PC clustering, and transient inconsistency
Authors: Schaeffer Benjamin , Brinkmann Peter , Francis George , Goudeseune Camille , Crowell Jim , Kaczmarski Hank 
Published: November 2006

AbstractDistributed scene graphs are important in virtual reality, both in collaborative virtual environments and in cluster rendering. Modern scalable visualization systems have high local throughput, but collaborative virtual environments (VEs) over a wide‐area network (WAN) share data at much lower rates. This complicates the use of one scene graph across the whole application. Myriad is an extension of the Syzygy VR toolkit in which individual scene graphs form a peer‐to‐peer network. Myriad connections filter scene graph updates and create flexible relationships between nodes of the scene graph. Myriad's sharing is fine‐grained: the properties of individual scene graph nodes to share are dynamically specified (in C++ or Python). Myriad permits transient inconsistency, relaxing resource requirements in collaborative VEs. A test application, WorldWideCrowd, demonstrates collaborative prototyping of a 300‐avatar crowd animation viewed on two PC‐cluster displays and edited on low‐powered laptops, desktops, and over a WAN. We have further used our framework to facilitate collaborative educational experiences and as a vehicle for undergraduates to experiment with shared virtual worlds. Copyright © 2006 John Wiley & Sons, Ltd.
Tikhonov regularization in standardized and general form for multivariate calibration with application towards removing unwanted spectral artifacts
Authors: Stout Forrest , Kalivas John H. 
Published: November 2006

AbstractTikhonov regularization (TR) is an approach to form a multivariate calibration model for y = Xb. It includes a regulation operator matrix L that is usually set to the identity matrix I and in this situation, TR is said to operate in standard form and is the same as ridge regression (RR). Alternatively, TR can function in general form with L ≠ I where L is used to remove unwanted spectral artifacts. To simplify the computations for TR in general form, a standardization process can be used on X and y to transform the problem into TR in standard form and a RR algorithm can now be used. The calculated regression vector in standardized space must be back‐transformed to the general form which can now be applied to spectra that have not been standardized. The calibration model building methods of principal component regression (PCR), partial least squares (PLS) and others can also be implemented with the standardized X and y. Regardless of the calibration method, armed with y, X and L, a regression vector is sought that can correct for irrelevant spectral variation in predicting y. In this study, L is set to various derivative operators to obtain smoothed TR, PCR and PLS regression vectors in order to generate models robust to noise and/or temperature effects. Results of this smoothing process are examined for spectral data without excessive noise or other artifacts, spectral data with additional noise added and spectral data exhibiting temperature‐induced peak shifts. When the noise level is small, derivative operator smoothing was found to slightly degrade the root mean square error of validation (RMSEV) as well as the prediction variance indicator represented by the regression vector 2‐norm $\left\| {{\rm \hat b}} \right\|_2$ thereby deteriorating the model harmony (bias/variance tradeoff). The effective rank (ER) (parsimony) was found to decrease with smoothing and in doing so; a harmony/parsimony tradeoff is formed. For the temperature‐affected data and some of the noisy data, derivative operator smoothing decreases the RMSEV, but at a cost of greater values for $\left\| {{\rm \hat b}} \right\|_2$. The ER was found to increase and hence, the parsimony degraded. A simulated data set from a previous study that used TR in general form was reexamined. In the present study, the standardization process is used with L set to the spectral noise structure to eliminate undesirable spectral regions (wavelength selection) and TR, PCR and PLS are evaluated. There was a significant decrease in bias at a sacrifice to variance with wavelength selection and the parsimony essentially remains the same. This paper includes discussion on the utility of using TR to remove other undesired spectral patterns resulting from chemical, environmental and/or instrumental influences. The discussion also incorporates using TR as a method for calibration transfer. Copyright © 2006 John Wiley & Sons, Ltd.
Bootstrap methods for confidence intervals of percentiles from dataset containing nondetected observations using lognormal distribution
Authors: Imaizumi Yoshitaka , Suzuki Noriyuki , Shiraishi Hiroaki 
Published: November 2006

AbstractWe evaluated 12 types of bootstrap methods for estimating the confidence intervals of percentiles predicted from a dataset containing nondetected (ND) results of Monte Carlo simulation. The bootstrap prediction process, which computes the confidence intervals, comprises three steps: resampling, calculating bootstrap parameters and computing confidence intervals. We selected several methods—parametric or nonparametric methods for resampling, lognormal or truncated lognormal for parent distribution, and ‘percentile’, ‘bootstrap‐t’ or ‘BCa’ methods for computing the confidence intervals. The reliabilities of these bootstrap methods were compared. In addition, we used environmental monitoring data, which were obtained in 2002 from various rivers in Japan for the verification of the bootstrap methods. The bootstrap confidence intervals for the five proposed methods were compared from the viewpoint of reliability. Based on the results computed by the ‘lognormal, parametric, bootstrap‐t’ method (LN‐P‐Bt)—the most reliable method—95% of the upper confidence limits of the 95th percentiles were from 1.7 to 2.1 times greater than the 95th percentiles directly predicted from the actual sample, and the logarithmic ranges for 90% of the bootstrap confidence intervals varied from 3.0 to 4.4. With regard to the maximum value among the five applied methods, the 95% upper confidence limits of the 95th percentiles were from 3.5 to 7.0 times greater than the 95th percentiles. The parent distribution cannot be assumed to randomly conform to a parametric distribution function particularly in the case of environmental monitoring data. For the conservative estimates, the confidence limits should be comprehensively evaluated from the values estimated by several methods that are established on the basis of different assumptions. Copyright © 2006 John Wiley & Sons, Ltd.
Application of PLS‐DA in multivariate image analysis
Authors: Chevallier Sylvie , Bertrand Dominique , Kohler Achim , Courcoux Philippe 
Published: November 2006

AbstractA simple imaging system has been developed for acquiring multivariate images in order to characterise the heterogeneity of food materials. The objective of the present work is, first, to demonstrate the capability of this acquisition system to discriminate food products of different natures. Secondly, our goal is to apply Partial Least Squares regression on these multivariate images and to evaluate the interest of various strategies of classification. A data set containing 24 images (702 × 524) acquired at different wavelengths for four food products is analysed. After the establishment of the PLS2 models employed for predicting the indicator variables, four strategies of classification of observations are tested. The first classification is done by selecting the largest component of the indicator variables. The others are based on the measurement of distances to the barycentres of the qualitative groups. Distances calculated can be either Euclidian distances or Mahalonobis distances. Except the strategy based on the Euclidian distance on scores, the strategies are rather equivalent, with a slight advantage to the Euclidian distance on predicted indicators. Another possibility addressed by the use of linear discriminant analysis (LDA) on multivariate images is to represent the qualitative groups as artificial images. The largest confusion appears between both cereal products while others are well classified. Copyright © 2006 John Wiley & Sons, Ltd.
Multivariate accelerated shelf‐life testing: a novel approach for determining the shelf‐life of foods
Authors: Pedro André M. K. , Ferreira Márcia M. C. 
Published: November 2006

AbstractIn order to meet consumers' expectations for high‐quality products, food industries must conduct shelf‐life studies that many times include the assessment of several analytical and sensory properties. However, whenever a new product is to be launched onto the market, defining which are the most relevant properties to monitor, as well as their cut‐off criterion, is the subject of strong debate. Besides, for products with long estimated shelf‐lives, accelerated studies have to be conducted and a third parameter has to be estimated: the acceleration factor which defines the correlation between the different storage conditions. In this study we propose a new approach for determining the shelf‐life of industrialised food products, the Multivariate Accelerated Shelf‐Life Test (MASLT), in which a Principal Component Analysis (PCA) is performed and the scores of the time‐related components are taken for estimating the multivariate rate constants (km), the multivariate acceleration factor (αm) and the multivariate activation energy (Eam). The method was successfully applied to a single‐concentrated industrialised tomato product for which the actual shelf‐life was estimated to be 28 months. Pseudo‐zero‐order kinetics resulted in the multivariate parameters α35,25m = 2.7 and Eam = 150 kJ·mol−1. Copyright © 2006 John Wiley & Sons, Ltd.
Ab initio Study of Energetic Solids: Cupric Azide, Mercuric Azide, and Lead Azide
Authors: Zhu Weihua , Xiao Heming 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Meta‐Barium Borate, II‐BaB2O4, at 163 and 293 K.
Authors: Lu Shao‐Fang , Huang Zi‐Xiang , Huang Jin‐Ling 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Lithium Dioxobis[trioxoiodato(V)]vanadate, Li[VO2(IO3)2].
Authors: Chen Xue‐An , Zhang Li , Chang Xin‐An , Zang He‐Gui , Xiao Wei‐Qiang 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Structure and Ionic‐Transport Properties of Lithium‐Containing Garnets Li3Ln3Te2O12 (Ln: Y, Pr, Nd, Sm—Lu).
Authors: O'Callaghan Michael P. , Lynham Danny R. , Cussen Edmund J. , Chen George Z. 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
ζ‐Y2[Si2O7]: A New Structure Type with the Yttrialite Series.
Authors: Hartenbach Ingo , Meier Steffen F. , Schleid Thomas 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Crystal Structure, Band Structure, and Physical Properties of Ba8Cu6‐xGe40+x (0 ≤ x ≤ 0.7).
Authors: Johnsen Simon , Bentien Anders , Madsen Georg K. H. , Iversen Bo B. , Nygren Mats 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chirality and Magnetism in a Novel Series of Isotypic Borophosphates: MII[BPO4(OH)2] (MII: Mn, Fe, Co).
Authors: Huang Ya‐Xi , Ewald Bastian , Schnelle Walter , Prots Yurii , Kniep Ruediger 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Hydrothermal Synthesis and Structural Characterizations of Two New Germanates with a Novel Topological Framework and Unusual Ge4(OH)4 Cubane.
Authors: Xu Yan , Cheng Liying , You Wansheng 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Structure and Magnetic Properties of Eu2CaCu2O6.
Authors: Xu Qiang , Klimczuk Tomasz , Jansen Jacob , Cava Robert J. , Zandbergen Henny W. 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Iridium Catalysts with Bicyclic Pyridine—Phosphinite Ligands: Asymmetric Hydrogenation of Olefins and Furan Derivatives.
Authors: Kaiser Stefan , Smidt Sebastian P. , Pfaltz Andreas 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Recoverable Poly(ethylene glycol)‐Supported C1‐Diamino‐oligothiophene Ligands for Palladium‐Promoted Asymmetric Allylic Alkylation (AAA) Reactions.
Authors: Bandini Marco , Benaglia Maurizio , Quinto Tommaso , Tommasi Simona , Umani‐Ronchi Achille 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
L‐Proline in an Ionic Liquid as an Efficient and Reusable Catalyst for Direct Asymmetric α‐Aminoxylation of Aldehydes and Ketones.
Authors: Guo Hai‐Ming , Niu Hong‐Ying , Xue Meng‐Xia , Guo Qi‐Xiang , Cun Lin‐Feng , Mi Ai‐Qiao , Jiang Yao‐Zhong , Wang Jian‐Ji 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Inversion of Diastereoselectivity Depending on Substrate Concentration in Baker′s Yeast Catalyzed Reduction of σ‐Symmetrical 1,3‐Cyclopentadiones and 1,3‐Cyclohexadiones.
Authors: Katoh Takahiro , Mizumoto Shinsuke , Fudesaka Masato , Nakashima Yuki , Kajimoto Tetsuya , Node Manabu 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cryovoltammetrically Probing Functional Group Reductive Cleavage: Alkyl—Sulfur versus Aryl—Sulfur Bond Cleavage in an Alkyl Naphthyl Thioether under Single Electron‐Transfer Is Temperature Switchable.
Authors: Paddon Christopher A. , Bhatti Farrah L. , Donohoe Timothy J. , Compton Richard G. 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Fluorine‐Containing 3‐Arylhydrazono‐2,4‐dioxobutanoates in Reactions with Difunctional Nucleophiles.
Authors: Fokin A. S. , Burgart Ya. V. , Saloutin V. I. 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Thermal and Metal‐Catalyzed Cyclization of 1‐Substituted 3,5‐Dien‐1‐ynes via a [1,7]‐Hydrogen Shift: Development of a Tandem Aldol Condensation—Dehydration and Aromatization Catalysis Between 3‐En‐1‐yn‐5‐al Units and Cyclic Ketones.
Authors: Lian Jian‐Jou , Lin Chung‐Chang , Chang Hsu‐Kai , Chen Po‐Chiang , Liu Rai‐Shung 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Prins Cyclizations in Au‐Catalyzed Reactions of Enynes.
Authors: Jimenez‐Nunez Eloisa , Claverie Christelle K. , Nieto‐Oberhuber Cristina , Echavarren Antonio M. 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Oxidative Synthesis of Azacyclic Derivatives Through the Nitrenium Ion: Application of a Hypervalent Iodine Species Electrochemically Generated from Iodobenzene.
Authors: Amano Yoshiharu , Nishiyama Shigeru 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Studies on Novel Synthetic Methodologies. Part 95. A Mild, Rapid and Highly Regioselective Ring‐Opening of Epoxides and Aziridines with Acetic Anhydride under Solvent‐Free Conditions Using Ammonium‐12‐molybdophosphate.
Authors: Das Biswanath , Reddy V. Saidi , Tehseen Fouzia 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Highly Efficient RuCl3‐Catalyzed Disproportionation of (Diacetoxyiodo)benzene to Iodylbenzene and Iodobenzene; Leading to the Efficient Oxidation of Alcohols to Carbonyl Compounds.
Authors: Yusubov Mekhman S. , Chi Ki‐Whan , Park Joo Yeon , Karimov Rashad , Zhdankin Viktor V. 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chemoselective Bromination of Active Methylene and Methyne Compounds by Potassium Bromide, Hydrochloride Acid and Hydrogen Peroxide.
Authors: Kirihara Masayuki , Ogawa Shiho , Noguchi Takuya , Okubo Kumiko , Monma Yoshinari , Shimizu Ikuko , Shimosaki Ryuji , Hatano Akihiko , Hirai Yoshiro 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Lactones. Part 30. Reaction of Halolactones with Trialkyl Phosphites.
Authors: Pisarski Bartlomiej , Wawrzenczyk Czeslaw 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Perchloric Acid Adsorbed on Silica Gel (HClO4—SiO2) as an Extremely Efficient and Reusable Catalyst for 1,3‐Dithiolane/Dithiane Formation.
Authors: Rudrawar Santosh , Besra Ram C. , Chakraborti Asit K. 
Published: November 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.