PROTEIN SCIENCE, Issue 9 2004
Mannargudi S. Sujatha
Abstract An aromatic amino acid is present in the binding site of a number of sugar binding proteins. The interaction of the saccharide with the aromatic residue is determined by their relative position as well as orientation. The position-orientation of the saccharide relative to the aromatic residue was found to vary in different sugar-binding proteins. In the present study, interaction energies of the complexes of galactose (Gal) and of glucose (Glc) with aromatic residue analogs have been calculated by ab initio density functional (U-B3LYP/ 6-31G**) theory. The position-orientations of the saccharide with respect to the aromatic residue observed in various Gal-, Glc-, and mannose,protein complexes were chosen for the interaction energy calculations. The results of these calculations show that galactose can interact with the aromatic residue with similar interaction energies in a number of position-orientations. The interaction energy of Gal,aromatic residue analog complex in position-orientations observed for the bound saccharide in Glc/Man,protein complexes is comparable to the Glc,aromatic residue analog complex in the same position-orientation. In contrast, there is a large variation in interaction energies of complexes of Glc- and of Gal- with the aromatic residue analog in position-orientations observed in Gal,protein complexes. Furthermore, the conformation wherein the O6 atom is away from the aromatic residue is preferred for the exocyclic ,CH2OH group in Gal,aromatic residue analog complexes. The implications of these results for saccharide binding in Gal-specific proteins and the possible role of the aromatic amino acid to ensure proper positioning and orientation of galactose in the binding site have been discussed. [source]

Photoperiodic differences in a forebrain nucleus involved in vocal plasticity: Enkephalin immunoreactivity reveals volumetric variation in song nucleus lMAN but not NIf in male European starlings (Sturnus vulgaris)

DEVELOPMENTAL NEUROBIOLOGY, Issue 11 2010
Tyler J. Stevenson
Abstract Seasonal variation in the volume of various song control nuclei in many passerine species remains one of the best examples of naturally occurring adult neuroplasticity among vertebrates. The lateral portion of the magnocellular nucleus of the anterior nidopallium (lMAN) is a song nucleus that is important for song learning and seems to be critical for inducing variability in the song structure that is later pruned via a feedback process to produce adult crystallized song. To date, lMAN has not been shown to exhibit seasonal changes in volume, probably because it is difficult to resolve the boundaries of lMAN when employing histological methods based on Nissl staining. Here, lMANcore volumes were examined in intact photostimulated (i.e., breeding), castrated photostimulated and photorefractory (i.e., nonbreeding) male starlings (Sturnus vulgaris) to investigate the degree of seasonal variation in brain morphology. We present data demonstrating that the volumes of the total MAN and lMANcore delineated by enkephalin immunoreactivity are greater in photostimulated male starlings as compared to photorefractory males. Moreover, two other regions associated with the song system that have not been investigated previously in the context of seasonal plasticity namely (i) the medial portion of MAN (mMAN), and (ii) the nucleus interfacialis (NIf) did not display significant volumetric variation. We propose that greater lMANcore volumes are associated with the increase in vocal plasticity that is generally observed prior to production of stereotyped song. © 2010 Wiley Periodicals, Inc. Develop Neurobiol 70: 751,763, 2010 [source]

AN UNUSUAL CASE OF ASTHENIA AND ANOREXIA IN AN ELDERLY CHINESE MAN

JOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 12 2009
Swee Sen Foo MRCP (UK)
No abstract is available for this article. [source]

TWO NOTIONS OF TRANSCENDENCE: CONFUCIAN MAN AND MODERN SUBJECT

JOURNAL OF CHINESE PHILOSOPHY, Issue 3 2009
GUOPING ZHAO
First page of article [source]

TIAN REN HE YI (THE HARMONIOUS ONENESS OF THE UNIVERSE AND MAN): A REVIEW OF STEVEN HEINE'S OPENING A MOUNTAIN,K,AN OF THE ZEN MASTERS1

JOURNAL OF CHINESE PHILOSOPHY, Issue 1 2006
LINYU GU
[source]

Modeling of partial oxidation in gas,solids downer reactors

AICHE JOURNAL, Issue 8 2010
S. Vaishali
Abstract Selective partial oxidations represent an important class of reactions in the process industry. Of particular interest is the partial oxidation of n-butane to maleic anhydride (MAN), which is arguably the largest commercialized alkane partial oxidation process. Partial oxidation of n-butane, which uses vanadium phosphorous oxide (VPO) as a heterogeneous catalyst, is believed to operate through a unique mechanism in which lattice oxygen oxidizes n-butane selectively to MAN. Past work has shown that performing partial oxidation reactions in gas,solids riser configuration is realizable and commercially viable, which has lead to commercialization of this technology in the last decade. Though the riser configuration allows optimal and independent control of the oxidation and reduction steps, the riser unit suffers from solid backmixing at walls, which in turn result into lower conversion, nonoptimal selectivity and diminished overall yield of desired product. In recent years, there has been growing interest in downers involving cocurrent downflow of both solids and gas phases, hence offering relatively uniform flow characteristics. In this contribution, we explore through modeling the implications of effecting partial oxidation reactions in a downer (gas,solids cocurrent downflow) compared to that in a conventional riser reactor (gas,solids cocurrent up flow) operated under equivalent operating conditions. Further, we explore the operational space of downers for these reactions, suggesting ways for improving the productivity of downer for partial oxidation applications. © 2009 American Institute of Chemical Engineers AIChE J, 2010 [source]

IR-SE and IR-MEMRI allow in vivo visualization of oscine neuroarchitecture including the main forebrain regions of the song control system

NMR IN BIOMEDICINE, Issue 1 2006
Ilse Tindemans
Abstract Songbirds share with humans the capacity to produce learned vocalizations (song). Recently, two major regions within the songbird's neural substrate for song learning and production; nucleus robustus arcopallii (RA) and area X (X) are visualized in vivo using Manganese Enhanced MRI (MEMRI). The aim of this study is to extend this to all main interconnected forebrain Song Control Nuclei. The ipsilateral feedback circuits allow Mn2+ to reach all main Song Control Nuclei after stereotaxic injection of very small doses of MnCl2 (10,nl of 10,mM) into HVC of one and MAN (nucleus magnocellularis nidopallii anterioris) of the other hemisphere. Application of a high resolution (80,µ) Spin Echo Inversion Recovery sequence instead of conventional T1-weighted Spin Echo images improves the image contrast dramatically such that some Song Control Nuclei, ventricles, several laminae, fibre tracts and other specific brain regions can be discerned. The combination of this contrast-rich IR-SE sequence with the transsynaptic transport property of Manganese (Inversion Recovery based MEMRI (IR-MEMRI)) enables the visualization of all main interconnected components of the Song Control System in telencephalon and thalamus. Copyright © 2006 John Wiley & Sons, Ltd. [source]

ISLANDSCAPES AND ,ISLANDNESS': THE PREHISTORIC ISLE OF MAN IN THE IRISH SEASCAPE

OXFORD JOURNAL OF ARCHAEOLOGY, Issue 2 2008
CATHERINE FRIEMAN
Summary. This paper will explore the role of the Isle of Man in the prehistory of the Irish Sea area through an examination of its changing islandscape from the Neolithic through the Iron Age. It was far from insular during prehistory, but the social and economic interactions of prehistoric Manx people around the Irish Sea and beyond were heavily affected by their water-bound environment. The way that the prehistoric Manx perceived their boundaries and their coastal situation is reflected in their ritual and social landscape, their preferential use of coastal areas for monumental architecture, and in the choices they made with regard to the island landscape they inhabited. This culturally constructed sense of islandness allowed the prehistoric Manx people to maintain distinctive local cultures while still playing an active role in the larger Irish Sea region. [source]

A THEORY OF MAN AS A CREATOR OF THE WORLD,

THE JAPANESE ECONOMIC REVIEW, Issue 1 2008
AKIHIKO MATSUIArticle first published online: 14 FEB 200
The present paper proposes a theory of man, wherein man constructs models of the world based on past experiences in social situations. The present theory considers experiences, or chunks of impressions, as primitives instead of an objective game, which is assumed to be given in the standard game theory. Agents construct models of the world based on direct and indirect experiences. Each model comprises a structural part and a factual part. The structural part is represented as a game, while the factual part is represented as a strategy profile of this game. In constructing a model, an agent might use certain axioms,for example coherence, according to which the model should be able to explain his or her own experiences; conformity to a solution concept; and minimality with respect to some simplicity measure. A few applications are presented to demonstrate how this theory works. [source]

PABLO LUIS MIRIZZI: THE MAN BEHIND THE SYNDROME

ANZ JOURNAL OF SURGERY, Issue 12 2007
Lisa N. Leopardi
Pablo Luis Mirizzi (1893,1964), who was born and died in the city of Cordoba in Argentina, dedicated his life to the service of surgery and the teaching of his students. Although known for the introduction of the intraoperative cholangiogram and for describing the Mirizzi syndrome , a partial obstruction of the common hepatic duct secondary to an impacted gallstone in the cystic duct, very little else is known about this man behind the brilliant surgical pioneer of the twentieth century. This biography looks beyond his important contributions to medicine, to the many facets of the man himself. [source]

35 YEAR-OLD MAN WITH FALCINE TUMOR

BRAIN PATHOLOGY, Issue 5 2010
Eytan Raz
No abstract is available for this article. [source]

A 61-YEAR-OLD MAN WITH INSTABILITY OF GAIT AND RIGHT HAND CLUMSINESS

BRAIN PATHOLOGY, Issue 1 2010
Anne Vital MD
No abstract is available for this article. [source]

A 76-YEAR-OLD MAN WITH COGNITIVE AND NEUROLOGICAL SYMPTOMS

BRAIN PATHOLOGY, Issue 4 2009
Hans Brunnström
First page of article [source]

72 YEAR-OLD MAN WITH NEW SEIZURE WHILE DANCING

BRAIN PATHOLOGY, Issue 2 2009
Julio César Gutiérrez Morales MD
No abstract is available for this article. [source]

A 28-YEAR-OLD MAN WITH HEADACHE, VISUAL AND APHASIC SPEECH DISTURBANCES

BRAIN PATHOLOGY, Issue 1 2009
Stephan Frank
First page of article [source]

A 50-YEAR-OLD MAN WITH BURKITT LYMPHOMA

BRAIN PATHOLOGY, Issue 4 2008
Karen SantaCruz MD
First page of article [source]

A 43-YEAR-OLD CHINESE MAN WITH A RETRO-ORBITAL MASS

BRAIN PATHOLOGY, Issue 1 2008
Article first published online: 22 JAN 200
No abstract is available for this article. [source]

Oxidation of Benzene to Maleic Anhydride in a Fluidized Bed Reactor

CHEMICAL ENGINEERING & TECHNOLOGY (CET), Issue 12 2007
C. Uraz
Abstract In this project, the selective oxidation of benzene to maleic anhydride (MAN) was studied. Gas phase catalytic oxidation of benzene was carried out in a laboratory scale fluidized bed reactor on six different types of catalysts, which have different compositions. Effects of temperature, flow rates of benzene and air and catalyst type on the reaction selectivity were investigated at atmospheric pressure. The experiments were performed over a temperature range of 325 to 400,°C, a space-time (W/FA0) range from 11.28,×,105 to 31.9,×,105 g,s,mol,1, and benzene/air mole ratio changes between 0.0109 and 0.0477. It was seen that conversion of benzene to MAN increased with increasing temperature for the catalysts supported by silica gel, aluminum oxide and titanium oxide. From the results it was found that conversion increased with increasing flow rate of air. When the comparison of the catalysts were made, it could be said that catalysts supported by silica gel showed higher MAN conversions. So it can be concluded that catalysts supported by silica gel were more suitable catalysts for benzene oxidation to MAN in a fluidized bed reactor. [source]

GANGLION BLOCKADE DOES NOT PREVENT CORTISOL-INDUCED HYPERTENSION IN MAN

CLINICAL AND EXPERIMENTAL PHARMACOLOGY AND PHYSIOLOGY, Issue 4 2005
Paula M Williamson
SUMMARY 1.,The aim of the present study was to assess the effect of ganglion blockade on blood pressure in cortisol treated human subjects. 2.,Four healthy male subjects were treated with cortisol 80 mg/day for a 5-day period. Ganglion blockade was achieved by intravenous trimethaphan. 3.,Ganglion blockade did not significantly alter blood pressure in the pretreatment phase or on the last day of cortisol treatment. 4.,Taken together with our previous observations that sympathetic activity is unaltered or reduced by cortisol, these results suggest that cortisol induced hypertension in humans is not a result of overactivity of the autonomic nervous system. [source]

Blood pressure support in extremely premature infants is affected by different courses of antenatal steroids

ACTA PAEDIATRICA, Issue 9 2009
GV Nair
Abstract Objective:, To examine the effects of partial, single and multiple courses of antenatal corticosteroids (ANS) on the need for blood pressure support in extremely premature infants. Methods:, Extremely premature infants with gestational age of 24 to 28 weeks were included in this study during a 5-year period. The main outcome measure of the study was the amount of blood pressure support during the first 3 days of life. Results:, The study infants (n = 163) were divided into: infants not exposed (ANS; n = 27) and exposed to ANS (ANS; n = 136). Blood pressure support was significantly lower in ANS compared with No ANS (65% vs 96%; p = 0.003) and in single course (SANS; n = 73) and ,2 courses (MANS; n = 34) compared with partial course of ANS (PANS; n = 29) (62%, 56% vs 86%; p = 0.03). The number of infants who received volume support and the amount of volume support were significantly lower in ANS compared with that in No ANS (p < 0.001) and in SANS and MANS compared with that in PANS (p < 0.02). Conclusion:, Exposure to multiple courses of ANS was as beneficial as single course of ANS in decreasing the need for blood pressure support in extremely premature infants. [source]

Stabilizer-free dispersion copolymerization of maleic anhydride and vinyl acetate.

JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 17 2005

Abstract A novel dispersion copolymerization of maleic anhydride (MAn) and vinyl acetate (VAc) without adding stabilizer is developed, which gives uniform copolymer microspheres with tunable sizes. Some principal factors affecting the microspheres, such as reaction time, monomer concentration and feed ratio, reaction media, and cosolvent, were investigated. It was found that the stabilizer-free dispersion copolymerization of MAn and VAc is a rapid process, and the particle size grows in accordance with the evolution of polymerization. The chemical composition of the copolymer microspheres was characterized by FT-IR and 13C NMR spectroscopies. Over a wide range of monomer concentrations, the microspheres can always be formed and stably dispersed, with uniform sizes ranging from 180 nm to 740 nm. The yield of copolymer microspheres reaches a maximum at 1:1 feed ratio of MAn to VAc, owing to the alternating copolymerization between the binary monomers by a known charge-transfer-complex mechanism. However, the diameter of microspheres drastically increases when MAn content is enhanced. Only some specific alkyl ester solvents, such as n -butyl acetate, isobutyl acetate, n -amyl acetate, are desirably fit for this unique stabilizer-free dispersion polymerization. Furthermore, we found that when some acetone is added as a cosolvent, the copolymer microspheres can still be formed, with much larger diameters. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 3760,3770, 2005 [source]

Robust Organic/Inorganic Hybrid Porous Thin Films via Breath-Figure Method and Gelation Process

MACROMOLECULAR RAPID COMMUNICATIONS, Issue 20 2007
Ke Zhang
Abstract A novel organic/inorganic hybrid honeycomb patterned porous thin film was prepared using the breath-figure method combined with a sol-gel process. An in situ formed gelable block copolymer, formed by mixing poly(styrene- alt -maleic anhydride)- block -polystyrene (P(St- a -MAn)- b -PS) and 3-aminopropyltrimethoxysilane (APS), was used as the structure directing agent. The porous film produced was dipped into an acid aqueous solution to induce a sol-gel process in the wall of film. As a result of gelation, the structure of this film transformed into a crosslinked silica oxide hybridized with PS, and this film resisted those organic solvents which were once good solvents for the copolymer precursor. [source]

A Novel, Facile Method for the Preparation of Uniform, Reactive Maleic Anhydride/Vinyl Acetate Copolymer Micro- and Nanospheres

MACROMOLECULAR RAPID COMMUNICATIONS, Issue 17 2004
Chang-Min Xing
Abstract Summary: A novel, stabilizer-free dispersion polymerization with alkyl esters as reaction media gives uniform alternating microspheres of maleic anhydride (MAn)/vinyl acetate (VAc) copolymer. The diameter of the copolymer microspheres could be precisely controlled from 80 to 750 nm by changing the monomer concentration or feed ratio. Moreover, this new type of copolymer microspheres with reactive anhydride groups on the surface has good solubility in common nontoxic solvents such as water and ethanol. SEM image of the powder surface of copolymer microspheres formed at [MAn],=,[VAc],=,1.5 M. [source]

ARREST TRAJECTORIES ACROSS A 17-YEAR SPAN FOR YOUNG MEN: RELATION TO DUAL TAXONOMIES AND SELF-REPORTED OFFENSE TRAJECTORIES,

CRIMINOLOGY, Issue 4 2007
MARGIT WIESNER
The purpose of this study was to evaluate the impact of different operationalizations of offending behavior on the identified trajectories of offending and to relate findings to hypothesized dual taxonomy models. Prior research with 203 young men from the Oregon Youth Study identified six offender pathways, based on self-report data (Wiesner and Capaldi, 2003). The current study used official records data (number of arrests) for the same sample. Semiparametric groupbased modeling indicated three distinctive arrest trajectories: high-level chronics, low-level chronics, and rare offenders. Both chronic arrest trajectory groups were characterized by relatively equal rates of early onset offenders, which indicates, therefore, some divergence from hypothesized dual taxonomies. Overall, this study demonstrated limited convergence of trajectory findings across official records versus selfreport measures of offending behavior. [source]

CULTURALLY-FOCUSED BATTERER COUNSELING FOR AFRICAN-AMERICAN MEN,

CRIMINOLOGY AND PUBLIC POLICY, Issue 2 2007
EDWARD W. GONDOLF
Research Summary: Clinicians and researchers have strongly recommended culturally-focused counseling with African-American men arrested for domestic violence. An experimental clinical trial tested the effectiveness of this approach against conventional cognitive-behavioral counseling in all-African-American groups and in racially-mixed groups (N = 501). No significant difference was found in the reassault rate reported by the men's female partners over a 12-month follow-up period (23% overall). During that period, men in the racially-mixed groups were, moreover, half as likely to be rearrested for domestic violence as the men in the culturally-focused groups. The men's level of racial identification did not significantly affect the outcomes of the counseling options. Policy Implications: Simply adding a culturally-focused counseling group to domestic violence programs does not seem in itself to improve outcomes. In the current study, the culturally-focused counseling was an appendage to an existing agency closely linked to the criminal justice system. Culturally-focused counseling may prove to be more effective within community-based organizations tied to local services and supports. [source]

THE RELATIVE POSITIONS OF MEN AND WOMEN IN AUSTRALIAN ACADEMIC ECONOMICS

ECONOMIC PAPERS: A JOURNAL OF APPLIED ECONOMICS AND POLICY, Issue 1 2000
KAREN MUMFORD
First page of article [source]

THE RELATIONSHIP BETWEEN ALCOHOL CONSUMPTION AND HEALTH CARE UTILIZATION AMONG MEN IN JAPAN: A REPLY TO THE COMMENTARIES

ADDICTION, Issue 1 2005
YUKIKO ANZAI
No abstract is available for this article. [source]

Parathyroid hormone related protein (PTHrP) mediated hypercalcaemia complicating enteropancreatic malignancy in multiple endocrine neoplasia type 1 (MEN 1)

INTERNAL MEDICINE JOURNAL, Issue 2 2000
J. R. BURGESS
No abstract is available for this article. [source]

LOWER MORTALITY FROM H1N1 INFLUENZA IN OLDER ARGENTINEANS: MEN MORE AFFECTED

JOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 9 2010
Matheus Roriz-Cruz MD
First page of article [source]

CIRCULATING SEX HORMONE LEVELS AND AORTIC STIFFNESS IN MEN

JOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 4 2007
Hamid Reza Nakhai Pour MD
No abstract is available for this article. [source]