Search Results
Results 201 - 250 of 483
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Vose Russell S - - 2004
Urbanization and other changes in land use have an impact on surface-air temperatures. Kalnay and Cai report that the observed surface-temperature trend in part of the United States exceeds the trend in the NCEP/NCAR 50-year reanalysis (NNR) and conclude that changes in land use account for the difference (0.035 degrees ...
O'Connor Brian P - - 2004
Self-reports of levels of physical exercise, experienced bodily changes, and attitudinal and well-being variables were obtained from 407 adults, aged 26 to 95 years. The purpose was to assess the relative magnitudes of the experienced benefits of exercise across the exercise continuum. Cluster analyses identified three groups at each of ...
Waliszewski Krzysztof N - - 2004
This study was conducted to determine sensory changes of fortified nixtamalized corn flour with lysine and tryptophan up to 83, 100, and 150% of suggested FAO pattern after 2 months storage at room temperature (30 degrees C). Totally, 16 trained panelists participated in sensory study of tortilla made of enriched ...
Turner N A - - 2004
AIMS: This study investigates the effects of biguanides during encystment of Acanthamoeba castellanii. METHODS AND RESULTS: A non-nutrient encystment system was used to investigate the changes in the levels of sorption (uptake) of three non-cysticidal concentrations (10, 20 and 50 microg ml(-1)) of chlorhexidine diacetate (CHA) and polyhexamethylene biguanide (PHMB) ...
Barnosky Anthony D - - 2003
To provide empirical evidence of species boundaries and the role of climatic change in affecting evolution, we documented evolution of the sagebrush vole, Lemmiscus curtatus, through hundreds of thousands of years by following populations from the middle Pleistocene to the present. We found that: (i) extant representatives of the species ...
Hughes Clare L - - 2003
During recent climate warming, some species have expanded their ranges northwards to keep track of climate changes. Evolutionary changes in dispersal have been demonstrated in these expanding populations and here we show that increased dispersal is associated with reduced investment in reproduction in populations of the speckled wood butterfly, Pararge ...
Zupancic Gregor - - 2003
A method was developed for dynamic spectrophotometric measurements in vivo in the presence of non-specific spectral changes due to external disturbances. This method was used to measure changes in mitochondrial respiratory pigment redox states in photoreceptor cells of live, white-eyed mutants of the blowfly Calliphora vicina. The changes were brought ...
Drapeau Martin - - 2003
This study investigated the stability of defensive functioning over the course of a 4-session Brief Psychodynamic Investigation (BPI). The sample included 61 outpatients from the Adult Psychiatry Department of the University of Lausanne, Switzerland. Defenses were measured from session transcripts using the DMRS quantitative method. Specific changes in defenses were ...
Jiménez Diego - - 2003
A new chromo-chemodosimeter for the anion sulfide in aqueous environments has been developed. The recognition concept is based on a pyrylium-thiopyrylium transformation that is conveniently drawn toward "color chemistry" concepts by means of the anchoring of an aniline group. This causes the color of the aniline-pyrylium backbone in L1 to ...
Burman William - - 2003
There is increasing controversy about the appropriate role of the local institutional review board in the review of multicenter clinical studies. We evaluated the effects of the local review process at 25 study sites on the consent forms from two studies of the Tuberculosis Trials Consortium, a multicenter trials group. ...
Schiffner R - - 2003
BACKGROUND: Willingness to pay (WTP) and time trade-off (TTO) have been used successfully as quality of life (QOL) measurements in dermatology. However, until now there have been no studies available individually comparing these measures pre- and post-treatment. OBJECTIVES: To check sensitivity to changes for WTP and TTO (i). pre- to ...
Kim Hyun Jeong - - 2003
BACKGROUND: A paucity of reports exist on the use of botulinum toxin type A injections as an alternative noninvasive treatment for masseteric hypertrophy. OBJECTIVE: To evaluate the effects of botulinum toxin type A on masseteric hypertrophy using computed tomography. METHODS: Percutaneous intramuscular injections of botulinum toxin type A of 30 ...
Chen Xiongwen - - 2003
Studies on the combined effects of global climate change and human disturbances are important for biodiversity conservation and natural resources management. Here we use the modified forest dynamics model to simulate the tree diversity change of a typical mixed broadleaved Korean pine forest regenerating from clear-cuts in Northeast China in ...
Bollman Krista M - - 2003
Loss-of-function mutations of HASTY (HST) affect many different processes in Arabidopsis development. In addition to reducing the size of both roots and lateral organs of the shoot, hst mutations affect the size of the shoot apical meristem, accelerate vegetative phase change, delay floral induction under short days, adaxialize leaves and ...
Stewart William C - - 2003
PURPOSE: To evaluate conjunctival hyperemia after short-term use of latanoprost 0.005%, bimatoprost 0.03% and travoprost 0.004% in normal adults. DESIGN: Prospective, randomized, double-masked crossover active controlled comparison. METHODS: We evaluated conjunctival hyperemia by a standard photographic measure at the slit lamp and by anterior segment photographs in healthy subjects after ...
Jónsdóttir Kristín - - 2003
BACKGROUND: The diversity in MOMP (major outer membrane protein) of Chlamydia trachomatis is thought to be necessary for the bacteria to survive in its environment. The rate of change in the omp1 gene (coding for MOMP) is not known. Iceland offers a good opportunity to study the epidemiology of chlamydial ...
Mori Akio - - 2003
In 1989 a new gelada baboon ( Theropithecus gelada) population was found in Arsi, on the opposite side of the Rift Valley to that of the known gelada populations of Semien and Showa. Previous comparisons of units of the band at Gado Goro, Arsi, in the same season in consecutive ...
Nijegorodov N - - 2003
The absorption and fluorescence properties of 35 specially selected methyl and stronger donor substituted benzene, naphthalene, biphenyl, anthracene and 2-azaanthracene compounds are studied experimentally (at 293 K) and quantum chemically. The fluorescence quantum yields, gamma, and decay times, tauf, for deaerated and non-deaerated solutions are measured. The oscillator strength, fe, ...
Peris C - - 2003
In this work on machine milking of ewes, pulsation rates of 120 and 180 cycles per min were compared, both with a pulsation ratio of 50:50 and a vacuum level of 36 kPa, comparing intramammary infection (IMI), somatic cell count (SCC) and teat end thickness changes. To this end, two ...
Roos-Barraclough Fiona - - 2003
Peat cores from two bogs were used to reconstruct changes in net atmospheric mercury deposition in Switzerland for the past 2-3 millennia. The two records were compared to assess the reliability of peat cores as archives of atmospheric mercury deposition. Net mercury accumulation rates and Hg(ex), an indicator of significant ...
Kelly Martyn G - - 2003
A study designed to examine the effect of intermittent diffuse nutrient inputs on diatom assemblages in a small upland stream in northern England was confounded by other changes that occurred in the stream just before fertilisation started. A flora dominated by attached diatoms changed, over a period of about 3 ...
Alroy John - - 2003
North American mammals experienced a major mass extinction at the Cretaceous/Tertiary (K/T) boundary that is tied unambiguously to the Chicxulub impact event. Immediately afterwards, there was an immense adaptive radiation that greatly expanded taxonomic diversity and the range of body sizes and ecological strategies. However, ties between later, Cenozoic impact ...
Li Chao - - 2003
Previous research by our group has revealed that the Blood Volume Pulse (BVP) waveform recorded using an infrared finger photoplethysmograph (PPG) undergoes changes as the subject performs physical exercise. In particular, a reduction in the depth of the Dicrotic Notch has been observed. There is an interest in characterizing those ...
Oh Hyuck Keun - - 2002
Kinetic studies on the pyridinolysis of aryl furan-2-carbodithioates 1 are carried out at 60.0 degrees C in acetonitrile. The biphasic rate dependence on the pyridine basicity with a breakpoint at pK(a) degrees = 5.2 is interpreted to indicate a change of the rate-limiting step from breakdown (beta(X) = 0.7-0.8) to ...
Naka Katerina K - - 2003
The time course of acute changes in large artery distensibility immediately and for 60 min following maximum treadmill exercise in normal subjects was characterized by simultaneously measuring upper and lower limb pulse wave velocity (PWV). A new oscillometric technique was used, which has proven to be sensitive to changes in ...
Ding Wei - - 2002
The length of cooperative units along the thin filament of rabbit psoas single muscle fibres was determined by reducing filament length by treatment with the thin filament severing protein, gelsolin, in the presence of Ca(2+) and 2,3-butanedione 2-monoxime (BDM). The average time for 50 % reduction in isometric tension was ...
Schuster Stefan - - 2002
Weakly electric fish communicate and electrolocate objects in the dark by discharging their electric organs (EOs) and monitoring the spatiotemporal pattern of current flow through their skin. In the South-American pulse-type gymnotid fish these organs often are intriguingly complex, comprising several hundreds of electrogenic cells (electrocytes) of various morphologies, innervation ...
Paynter Sally - - 2002
Recently, the observation of pH-induced conformational changes of biomolecules supported on carboxymethyldextran (CMD)-coated surfaces measured using surface plasmon resonance (SPR) has been reported. However, it is apparent that the evidence reported in the literature is ambiguous. The research presented in this paper describes investigations to study the changing SPR signal ...
Lukashkin Andrei N - - 2002
2f1-f2 distortion product otoacoustic emissions (DPOAEs) were recorded from guinea pigs. DPOAEs showed complex time dependence at the onset of stimulation. The DPOAE, measured during the first 500 ms, can either decrease or increase at the onset depending on both the frequencies and levels of the primary tones. These changes ...
Lee P - - 2002
Does the size of a tympanic membrane defect influence the success rate in myringoplasty? Many studies which have suggested that size does not affect results have included only small numbers of patients. After a power analysis to identify the size of groups needed to detect a clinically significant difference between ...
Callaghan Patrick - - 2002
OBJECTIVES: The objective of the present study was to test the application of the Transtheoretical Model of Change (TTM) in relation to exercise behaviour of 298 Hong Kong Chinese undergraduates. DESIGN AND METHODS: A cross-sectional design was used. Respondents completed measures of stages of change, self-efficacy, processes of change, decisional ...
Kullmann L - - 2002
We study the time-dependent cross-correlations of stock returns, i.e., we measure the correlation as the function of the time shift between pairs of stock return time series using tick-by-tick data. We find a weak but significant effect showing that in many cases the maximum correlation appears at nonzero time shift, ...
Wallaschofski H - - 2002
The most likely reasons for the low predictive value of TSH-receptor antibodies (TRAbs) determinations in previous investigations are the biological heterogeneity of TRAbs and changes of the different stimulating (TSAb) or blocking (TSBAb) antibody bioactivities of TRAbs during the course of Graves' disease (GD), which have not been taken into ...
Walker Robert - - 2002
This paper examines changes in hunting ability across the lifespan for the Ache of eastern Paraguay. Hunting ability is decomposed into two components-finding prey and probability of kill upon encounter- and analyzed for important prey species. Results support the argument that skill acquisition is an important aspect of the human ...
Uyeda S - - 2002
Significant anomalous changes in the ultra low frequency range (approximately 0.01 Hz) were observed in both geoelectric and geomagnetic fields before the major volcano-seismic activity in the Izu Island region, Japan. The spectral intensity of the geoelectric potential difference between some electrodes on Niijima Island and the third principal component ...
Morales M Lourdes - - 2002
Changes in the aroma profile of five Sherry wine vinegars submitted to an experimental static aging in wood were followed along 24 months. Eighteen volatile compounds were determined by GC-FID. The results were subjected to multivariate analyses: principal component analysis and linear discriminant analysis. The aroma profile of vinegar can ...
Watanabe Ken-chi - - 2002
BACKGROUND: Cisplatin (CDDP) is known to cause inner ear damage while carboplatin (CBDCA) induces less ototoxicity than CDDP. We examined apoptotic changes in the cochlea of guinea pigs after injection of CDDP or CBDCA using immunohistochemical and electrophysiological techniques. METHODS: Three days after the injection of each solution, the cochleas ...
Hassan Hatim A - - 2002
To study the effect of the reversal of the blood ports on blood flow rate (QB), percentage recirculation, and blood urea nitrogen (BUN) clearance, we compared 12 well functioning chronic hemodialysis catheters (7 PermCaths and 5 Tesio Twin Catheters) in both standard and reversed blood flow setups. The reversal of ...
Abdallah J M - - 2002
The objective of this work was to investigate the relationships of productive life with changes in bull evaluations for yield traits. Two datasets were analyzed. In the first, predicted differences for change in milk yield from first to second lactation of daughters of artificial insemination (AI) Holstein bulls used widely ...
Mills Christopher N - - 2002
We studied the effects on aerosol bolus inhalations of small changes in convective inhomogeneity induced by posture change from upright to supine in nine normal subjects. Vital capacity single-breath nitrogen washout tests were used to determine ventilatory inhomogeneity change between postures. Relative to upright, supine phase III slope was increased ...
Lin Cindy S-Y - - 2002
The changes in excitability of cutaneous afferents in the median nerve of healthy subjects were compared during 13 min of ischaemia and during 13 min continuous depolarizing DC. In addition, intermittent polarizing currents were used to compensate for or to accentuate the threshold change produced by ischaemia. Measurements were made ...
Rohde Manfred - - 2002
During the past 15 years the saprophytic fungus Aspergillus fumigatus has become the most prevalent airborne fungal pathogen, causing severe and often fatal infections especially in immuno-compromised patients. Germination of inhaled conidia is an early and crucial event in the infection process of A. fumigatus. In this study we have ...
de Berker David - - 2002
Cosmetic defects of the nail cover a range of changes. Some are variants of normal which are considered unattractive, others are part of the normal ageing process and some changes are manifestations of local or systemic disease. Interpretation of these changes relies on recognition of the specific characteristics in question ...
Shaw G Y - - 2001
This study identified the electroglottographic (EGG) and acoustic measures that were most predictive of change in the glottic gap size of patients undergoing type I thyroplasty or autologous fat injection. Simultaneous EGG and acoustic recordings were made before and after autologous fat injection in 23 patients and type I thyroplasty ...
Karam P A - - 2001
Both background radiation levels and atmospheric oxygen concentrations have changed dramatically over the history of life on earth. Because oxygen has a strong modifying influence on radiogenic mutation rates, these factors must be considered jointly to determine changes in radiogenic mutation rates over time. Using accepted models that describe how ...
Scheffer M - - 2001
All ecosystems are exposed to gradual changes in climate, nutrient loading, habitat fragmentation or biotic exploitation. Nature is usually assumed to respond to gradual change in a smooth way. However, studies on lakes, coral reefs, oceans, forests and arid lands have shown that smooth change can be interrupted by sudden ...
Thompson J T - - 2001
We investigated the kinematics of mantle movement during escape jet behavior in an ontogenetic series of Sepioteuthis lessoniana, the oval squid. Changes in mantle diameter during the jet were measured from digitized S-VHS video fields of tethered animals that ranged in age from hatchlings to 9 weeks. The amplitude of ...
Medhurst J L - - 2001
The crown structure of Eucalyptus nitens (Deane & Maiden) Maiden 6 years after thinning, and the development of stand leaf area index both immediately and 6 years after thinning, were investigated. Thinning did not alter branch angle, branching density or the relationship between branch size and branch leaf area. However, ...
Foss R D - - 2001
This study was conducted to determine whether the lowered BAC limit for drivers in North Carolina resulted in fewer alcohol-related motor vehicle crashes. We used time-series analysis to examine several indicators of alcohol involvement in both injury and fatal crashes between 1991 and 1996. Data from NC crash files as ...
Wiener E - - 2001
Transverse relaxation rates R2(*) were measured in subjects performing a motor task using a segmented EPI double gradient echo sequence (TE = 23/70 ms) with five different voxel sizes between 1.8 mm(3) and 41.7 mm(3). An analysis of the errors involved in the calculation of the change of the transverse ...
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