bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lanthanum Trifluoromethanesulfonate‐Catalyzed Facile Synthesis of Per‐O‐acetylated Sugars and Their One‐Pot Conversion to S‐Aryl and O‐Alkyl/Aryl Glycosides.
Authors: Dasgupta Somnath , Rajput Vishal Kumar , Roy Bimalendu , Mukhopadhyay Balaram 
Published: October 2007

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.
Synthesis of 2,3‐Dihydroxy‐1‐epilupinine.
Authors: Pasniczek Konrad , Jurczak Margarita , Solecka Jolanta , Urbanczyk‐Lipkowska Zofia , Chmielewski Marek 
Published: October 2007

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.
Microwave‐Assisted Efficient Synthesis of Polymethoxyacetophenones and Natural Polymethoxyflavones, and Their Inhibitory Effects on Melanogenesis.
Authors: Tsukayama Masao , Kusunoki Eiji , Hossain Mohammad M. , Kawamura Yasuhiko , Hayashi Shinji 
Published: October 2007

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.
The Catalytic Asymmetric Claisen Rearrangement (CAC) in Natural Product Synthesis: Synthetic Studies Toward (‐)‐Ecklonialactone B.
Authors: Wang Qi , Millet Agnes , Hiersemann Martin 
Published: October 2007

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.
Novel Heterocyclic Thyromimetics. Part 2.
Authors: Haning Helmut , Mueller Ulrich , Schmidt Gunter , Schmeck Carsten , Voehringer Verena , Kretschmer Axel , Bischoff Hilmar 
Published: October 2007

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.
Pseudoverticin, a Novel Benzoquinone‐Derived Ansamycin Antibiotic Obtained as New Cell Cycle Inhibitor from Streptomyces pseudoverticillus YN17707.
Authors: Cui Cheng‐Bin , Han Bing , Cai Bing , Wang Hao 
Published: October 2007

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.
Synthesis of a Natural Oligosaccharide Antibiotic Active Against Helicobacter pylori.
Authors: Manabe Shino , Ishii Kazuyuki , Ito Yukishige 
Published: October 2007

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.
Total Synthesis of Amphidinolide Y by Formation of Trisubstituted (E)‐Double Bond via Ring‐Closing Metathesis of Densely Functionalized Alkenes.
Authors: Jin Jian , Chen Yile , Li Yannian , Wu Jinlong , Dai Wei‐Min 
Published: October 2007

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.
The Total Synthesis of Psymberin
Authors: Huang Xianhai , Shao Ning , Palani Anandan , Aslanian Robert , Buevich Alexei 
Published: October 2007

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.
Chalcogenide Clusters of Group 5—7 Metals
Authors: Fedorov V. E. , Mironov Yu. V. , Naumov N. G. , Sokolov M. N. , Fedin V. P. 
Published: October 2007

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.
The First Two Decades of a Versatile Electron Acceptor Building Block: 11,11,12,12‐Tetracyano‐9,10‐anthraquinodimethane (TCAQ)
Authors: Gomez Rafael , Seoane Carlos , Segura Jose L. 
Published: October 2007

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.
What Do We Need for a Superhydrophobic Surface? A Review on the Recent Progress in the Preparation of Superhydrophobic Surfaces
Authors: Li Xue‐Mei , Reinhoudt David , Crego‐Calama Mercedes 
Published: October 2007

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.
Uronic Acids in Oligosaccharide Synthesis
Authors: van den Bos Leendert J. , Codee Jeroen D. C. , Litjens Remy E. J. N. , Dinkelaar Jasper , Overkleeft Herman S. , van der Marel Gijsbert A. 
Published: October 2007

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.
Chiral Glycolate Equivalents for the Asymmetric Synthesis of α‐Hydroxycarbonyl Compounds.
Authors: Ley Steven V. , Sheppard Tom D. , Myers Rebecca M. , Chorghade Mukund S. 
Published: October 2007

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.
Microwave Heating: A New Synthetic Tool for Cluster Synthesis
Authors: Millos Constantinos J. , Gavin Whittaker A. , Brechin Euan K. 
Published: October 2007

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.
The Chemical Development of CHIR‐258
Authors: Zhu Shuguang , Harwood Eric , Cai Shaopei , Shang Xiao , Galvin Gabriel , Jin Li , Yeung Arthur , Diaz Brian , Zheng Minna , Ryckman David 
Published: October 2007

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.
Fungal Terpene Metabolites: Biosynthetic Relationships and the Control of the Phytopathogenic Fungus Botrytis cinerea
Authors: Collado Isidro Gonzalez , Macias Sanchez Antonio Jose , Hanson James R. 
Published: October 2007

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.
Noncompaction and Neuromuscular Disease with Positive Troponin‐T in a Nonagenerian
Authors: Finsterer Josef , Stöllberger Claudia 
Published: October 2007

AbstractIn a 94‐year‐old male with a history of atrial fibrillation, aortic stenosis, heart failure, apical thrombus, arterial hypertension, aneurysm of the abdominal aorta, and a urinary bladder carcinoma, cardiologic investigations revealed pulmonary rales, enlarged heart, absolute arrhythmia, and positive troponin‐, myocardial thickening, enlarged cardiac cavities, hypocontractility, aortic stenosis, slight aortic insufficiency, severe mitral insufficiency, and surprisingly left ventricular hypertrabeculation. Upon neurological investigations, a polyneuropathy was suspected but a myopathy not completely excluded. The presented case shows that LVHT occurs also in nonagenarians and is associated with neuromuscular disease and positive troponin‐T, in the absence of ischemic heart disease or severe renal failure. The cause of troponin‐T‐positivity remains multi‐factorial. Copyright © 2007 Wiley Periodicals, Inc.
Asynchronous Movement of Mitral Annulus: An Additional Mechanism of Ischaemic Mitral Regurgitation
Authors: Szymanski Piotr , Klisiewicz Anna , Hoffman Piotr 
Published: October 2007

AbstractIn‐coordinate mitral annulus movement might participate in the pathogenesis of functional mitral regurgitation. We evaluated a relationship between indices of mitral annulus systolic asynchrony and mitral regurgitation in patients after myocardial infarction in order to determine independent determinants of effective regurgitant orifice (ERO) area in a multivariate regression model.Tissue Doppler echocardiographic studies and quantitative analysis of mitral regurgitation were performed in 40 patients (33 men, 7 women, mean age 60.1 ± 9.2 years) with a history of Q‐wave myocardial infarction, with and without significant functional mitral regurgitation.A multivariate regression model showed that mitral annulus movement asynchrony index—difference between the longest and the shortest time from the R wave in the electrocardiogram to the cessation of systolic movement of the four aspects of mitral annulus, is an independent from ejection fraction, sphericity index, tenting, annulus diameter and infarct location, determinant of mitral regurgitation ERO area (r2 change 0.72, p ≤ 0.01). The only other independent predictor of ERO area was mitral annulus diameter (r2 change 0.79, p ≤ 0.01). Other variables were predictors of ERO only in univariate analyses: ejection fraction (r2 change 0.59, p ≤ 0.01), tenting area (r2 change 0.76, p ≤0.01 ) and sphericity index (r2 change 0.75, p ≤0.01).In conclusion, mitral annulus asynchrony is an additional mechanism contributing to the development of functional mitral regurgitation. This suggests, that cardiac resynchronization might be considered, either as a first line intervention in patients with mitral regurgitation not considered for mitral surgery or as a supplementary measure, when results of surgery are suboptimal. Copyright © 2007 Wiley Periodicals, Inc.
Sphingomyelinase and ceramidase in the intestinal tract
Authors: Duan Rui‐Dong 
Published: October 2007

AbstractSphingomyelin (SM) has emerged as an important source of lipid messengers affecting cell proliferation, differentiation and apoptosis. SM is present in mammalian cell membranes as a lipid constituent and also found as a component of dietary products such as milk, egg and meat. Digestion of SM has been found to have important implications in colon cancer development, gut maturation, and cholesterol absorption. SM in the intestine is sequentially digested by alkaline sphingomyelinase and neutral ceramidase before absorption. In the last decade, rapid progress has been made in many aspects of these two enzymes. The review intends to provide a short summary of the current knowledge on the properties, functions and the pathological changes of the enzymes in the intestinal tract.
Potential of Biowaste from the Food Industry as a Biomass Resource
Authors: Mahro B. , Timm M. 
Published: October 2007

AbstractThe importance of biomass as a resource for energy production or as a chemical feedstock will increase significantly in the next decades. The amounts of biomass that can be used for non‐food purposes however will be limited and its use will compete with other claims like food and feed production. In order to minimize such food‐feed‐fuel conflicts it is necessary to integrate all kinds of biowaste into a biomass economy. The food industry in particular might be a good candidate for assessment, since it produces inevitably large amounts of biogenic residues each year. The possibilities to use food processing residues for non‐food purposes like bioenergy, biomaterial production, chemical feedstock or as animal feed are therefore discussed in more detail in this paper. It is shown that food processing residues represent a small but valuable biomass fraction that can be exploited in numerous ways. The most promising approach appears to be to design new microbial bioconversion processes as part of more complex biorefinery concepts.
Optimization of Citric Acid Production from Glucose by Yarrowia lipolytica
Authors: Moeller L. , Strehlitz B. , Aurich A. , Zehnsdorf A. , Bley T. 
Published: October 2007

AbstractCitric acid (CA) is mainly produced in a biotechnological process using Aspergillus niger. In this process, large amounts of wastes have to be removed. Since the use of Yarrowia lipolytica for CA production is an environmental compatible alternative method, the CA production was optimized in regard to growth temperature and pH as well as substrate and product inhibition. The highest value of the maximum specific growth rate at pH 6.5 was found to be μmax = 0.192 h–1, whereas the largest amount of CA of 24.91 g/L as well as the highest selectivity of the bioprocess (89.9 % CA) and the maximum yield (0.22 gCA/gGlucose) were obtained at pH 6.0. During the growth phase, the temperature optimum was found to be in the range of 30–34 °C (μmax = 0.132 h–1). Nevertheless, the highest concentration of CA during the production phase was obtained at 30 °C (41 g/L CA, 93.1 % CA, 0.55 gCA/gglucose). In studying the substrate inhibition of the process, a clear tendency of decrease in the maximum specific growth rate was detected when the initial glucose concentration was increased from 50 g/L (μmax = 0.17 h–1) to 200 g/L (μmax = 0.055 h–1). The addition of 120 g/L CA to the culture broth at the start of the production phase reduced the production of CA from 32.1 g/L to 7.4 g/L.
Gasoline Vapor Biofiltration
Authors: Paca J. , Halecky M. , Maryska M. , Jones K. 
Published: October 2007

AbstractWhile gasoline vapor emissions are common sources of air pollution, very few results have been published on the biofilter biodegradation of gasoline vapors in flowing waste gases. This investigation reports on a bench‐scale biofilter of an ID of 50 mm and a bed height of 850 mm with an inexpensive fire clay chip medium as a packing material. The biofilter was inoculated with a concentrate of a mixed culture of the common microflora. After an acclimatization period of three weeks, loading tests were carried out at increasing gasoline inlet concentrations at a constant Empty Bed Retention Time (EBRT) of 16 min. Evaluating the removal rate and efficiency of aliphatic and aromatic fractions of the gasoline vapor, it was found that in a range of overall organic loading (OLTPH) up to 33.6 g/m3 h the removal efficiency of aromatic hydrocarbons decreased from 90 to 70 %, while that of the aliphatic components decreased much more significantly from 60 to 10 % after six months of operation. The removal rate and efficiency achieved for total petroleum hydrocarbons were 13 g/m3 h and 45 %, respectively. The microbial strains and genera of culturable cells in the inoculum and in the biofilm after six months of gasoline degradation were evaluated.
Production of PHB from Crude Glycerol
Authors: Mothes G. , Schnorpfeil C. , Ackermann J.‐U. 
Published: October 2007

AbstractCrude glycerol – a by‐product of the large scale production of diesel oil from rape – is examined for its possible use as a cheap feedstock for the biotechnological synthesis of poly(3‐hydroxybutyrate) (PHB). The glycerol samples of various manufacturers differ in their contamination with salts (NaCl or K2SO4), methanol or fatty acids. At high cell density fermentation these pollutants could possibly accumulate to inhibiting concentrations. The bacteria used were Paracoccus denitrificans and Cupriavidus necator JMP 134, which accumulate PHB from pure glycerol to a content of 70 % of cell dry mass. When using crude glycerol containing 5.5 % NaCl, a reduced PHB content of 48 % was observed at a bacterial dry mass of 50 g/L. Furthermore the PHB yield coefficient was reduced, obviously due to osmoregulation. The effect of glycerol contaminated with K2SO4 was less pronounced. The molecular weight of PHB produced with P. denitrificans or C. necator from crude glycerol varies between 620000 and 750000 g/mol which allows the processing by common techniques of the polymer industry.
Effects of Cultivation Parameters on the Morphology of Rhizopus arrhizus and the Lactic Acid Production in a Bubble Column Reactor
Authors: Zhang Z. Y. , Jin B. , Kelly J. M. 
Published: October 2007

AbstractThe use of filamentous Rhizopus for lactic acid production is facing a challenge due to its low yield mainly caused by the difficulty to control its morphology in submerged fermentation processes. This study was aimed at investigating the impacts of cultivation parameters on the morphology of Rhizopus arrhizus DAR 36017 and lactic acid production using waste potato starch in a laboratory scale bubble column reactor (BCR). The fungal morphology was significantly influenced by carbon sources, process pH, starch concentrations, sparger designs and aeration rates. The favorable morphology for lactic acid production was a freely dispersed small pellet, which was achieved under operation conditions at pH 5.0–6.0, starch concentrations of 60–120 g/L and aeration rates of 0.2–0.8 vvm using a sintered stainless steel disc sparger. Optimal cultivation conditions at pH 6.0 and an aeration rate of 0.4 vvm resulted in the formation of freely dispersed small pellets and 103.8 g/L lactic acid with a yield of 87 % from 120 g/L liquefied potato starch in 48 h. The overall results in terms of lactic acid yield and productivity are comparable to those reported in previous studies using immobilized Rhizopus cells in batch fermentations.
Asymmetric synthesis of δ‐lactones with lipase catalyst
Authors: Shimotori Yasutaka , Sekine Kazuki , Miyakoshi Tetsuo 
Published: October 2007

AbstractBoth enantiomers of δ‐lactones (δ‐decalactone, δ‐undecalactone and δ‐dodecalactone) were synthesized in three steps via Novozym 435‐catalysed acetylation of rac‐N‐methyl‐5‐hydroxyalkylamides with about 80% e.e. The enantiomeric excess of δ‐lactones was increased to 89–99% e.e. by substitution of porcine pancreatic lipase (PPL)‐catalysed hydrolysis of rac‐N‐methyl‐5‐acetoxyalkylamides for Novozym 435‐catalysed acetylation of rac‐N‐methyl‐5‐hydroxyalkylamides. Copyright © 2007 John Wiley & Sons, Ltd.
Learning invariants to illumination changes typical of indoor environments: Application to image color correction
Authors: Bascle B. , Bernier O. , Lemaire V. 
Published: October 2007

AbstractThis paper presents a new approach for automatic image color correction, based on statistical learning. The method both parameterizes color independently of illumination and corrects color for changes of illumination. This is useful in many image processing applications, such as image segmentation or background subtraction. The motivation for using a learning approach is to deal with changes of lighting typical of indoor environments such as home and office. The method is based on learning color invariants using a modified multi‐layer perceptron (MLP). The MLP is odd‐layered. The middle layer includes two neurons which estimate two color invariants and one input neuron which takes in the luminance desired in output of the MLP. The advantage of the modified MLP over a classical MLP is better performance and the estimation of invariants to illumination. The trained modified MLP can be applied using look‐up tables, yielding very fast processing. Results illustrate the approach and compare it with other color correction approaches from the literature. © 2007 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 17, 132–142, 2007
On modeling interchannel dependency for color image denoising
Authors: Li Xin 
Published: October 2007

AbstractIn this article, we study the modeling of interchannel dependency and its application into removing additive noise from corrupted color images. We start from an ad hoc spatially invariant linear interpolative model for characterizing color‐difference and demonstrate how it can be jointly used with a variational intrachannel dependency model to suppress noise by alternating projections. Then we present two nonlinear diffusion‐based models in the color‐difference domain and suggest their spatial adaptation property better matches the class of images with strong chromatic edges. The diversity of interchannel dependency models also motivates us to fuse multiple denoised images from different models to obtain better denoised results. Experimental results are reported to justify the importance of matching the hypothesized dependency model with observation data as well as the benefit of multihypothesis fusion. © 2007 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 17, 163–173, 2007
Color aided motion‐segmentation and object tracking for video sequences semantic analysis
Authors: Briassouli Alexia , Mezaris Vasileios , Kompatsiaris Ioannis 
Published: October 2007

AbstractThe high rates at which digital multimedia is being generated and used makes it necessary to develop systems that can process it in an efficient manner. This can be achieved by extracting semantics from processing the video's low‐level information. We present a novel algorithm which fuses color and motion information, in order to extract semantics from the video sequence. The motion estimates are processed statistically to give areas of activity in the video. Color segmentation is applied to these areas, and also to their complementary regions in each frame, in order to achieve the moving object segmentation. The extracted color layers in the activity and background areas are compared using the earth mover's distance (EMD), and a novel method, which we introduce, and which is based on a likelihood ratio test (LRT). The segmentation results of our LRT‐based approach are shown to be more robust than the EMD results, and both methods are shown to be more accurate than the existing combined color‐motion approaches. Furthermore, the LRT method allows the retrieval of additional semantics, namely of “maps” that indicate with what likelihood a pixel belongs to a moving object. The areas of activity can be used to retrieve semantics for the kind of activity taking place. The color‐aided segmentation of the moving entities provides a full description of their appearance, so it can be used, for example, to classify the video based on the objects in it. Experiments with real sequences show that this method leads to accurate results and useful semantics. © 2007 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 17, 174–189, 2007
Skin sensitization potency of isoeugenol and its dimers evaluated by a non‐radioisotopic modification of the local lymph node assay and guinea pig maximization test
Authors: Takeyoshi Masahiro , Iida Kenji , Suzuki Keiko , Yamazaki Shunsuke 
Published: October 2007

AbstractAllergic contact dermatitis is the serious unwanted effect arising from the use of consumer products such as cosmetics. Isoeugenol is a fragrance chemical with spicy, carnation‐like scent, is used in many kinds of cosmetics and is a well‐known moderate human sensitizer. It was previously reported that the dimerization of eugenol yielded two types of dimer possessing different sensitization potencies. This study reports the differences in skin sensitization potencies for isoeugenol and two types of dimer, β‐O‐4‐dilignol and dehydrodiisoeugenol (DIEG), as evaluated by the non‐radioisotopic local lymph node assay (non‐RI LLNA) and guinea pig maximization test. In the guinea pig maximization test, isoeugenol, β‐O‐4‐dilignol and DIEG were classified as extreme, weak and moderate sensitizers, respectively. As for the results of non‐RI LLNA, the EC3 for isoeugenol, β‐O‐4‐dilignol and DIEG were calculated as 12.7%, >30% and 9.4%, respectively. The two types of isoeugenol dimer showed different sensitizing activities similar to the case for eugenol dimers. A reduction of sensitization potency achieved by dimerization may lead to developing safer cosmetic ingredients. Isoeugenol dimers are not currently used for fragrance chemicals. However, the dimerization of isoeugenol may yield a promising candidate as a cosmetic ingredient with low sensitization risk. The data may also provide useful information for the structure‐activity relationship (SAR) in skin sensitization. Copyright © 2007 John Wiley & Sons, Ltd.