This study describes the peroperative endoscopic findings about the size, shape and mucosal changes of the middle turbinate in patients with chronic sinusitis who underwent total spheno-ethmoidectomy. Results confirmed the middle turbinate to be a useful landmark in performing extensive sinus surgery. The most frequent change due to chronic inflammation ...

During water immersion in humans, the use of changes in hematocrit (Hct) and hemoglobin concentration (Hb) underestimates the relative changes in plasma volume (PV) as measured directly with Evans blue (EB). It is not known whether the same is the case during posture changes. Therefore, changes in PV were determined ...

Estimates derived from linear models fitted to melanoma death rates at successive time periods for the contiguous states of the US suggest that, allowing for latitude, rates are higher in the coastal than in the interior states. The effect of latitude on melanoma death rates in the white population of ...

Bird song is controlled by a discrete network of brain nuclei. The size of several song control nuclei changes seasonally in many seasonally breeding songbird species. Reports of seasonal changes in the size of song nuclei have relied primarily on Nissl stains to define the borders of these regions. Recent ...

Previous photoselection measurements showed that if the excitation is weak no optical anisotropy changes appear in immobilized purple membranes during the photocycle. The present study demonstrates that surprisingly at stronger excitations the anisotropy changes versus time. At 412 nm the dichroic ratio decreases after a few milliseconds, while at 570 ...

BACKGROUND: Treatment-related changes in hyperpigmentation are difficult to quantify with visible light photography, especially when the changes are subtle. OBJECTIVE: Our purpose was to determine the utility and reliability of fluorescence photography to measure changes in mottled and diffuse hyperpigmentation. METHODS: Thirty-two subjects, with mildly to moderately photodamaged skin, completed ...

Osmotic stress was applied to the perfused rat submandibular gland during steady-state fluid secretion. Alterations of perfusate osmolarity, by addition or withdrawal of sucrose or NaCl, caused transient changes in secretory rate during continuous stimulation with 1 microM acetylcholine (ACh). Hyposmotic perfusates transiently increased, and hyperosmotic perfusates transiently reduced, the ...

The kinetic parameters of alpha-methyl-D-glucoside (alpha Glc1Me) have been determined in the small intestine in order to establish developmental and regional changes in the apical transport in embryos and newly hatched chicks. Results show that the apparent Michaelis constant (Km) values did not change during the period studied in each ...

At no time in history has the pace of organizational change been so great. And while ample attention has been placed on the need for change, significantly less attention has been placed on the human side of these changes. Across the country, organizations are now recognizing the need for new ...

4-Aminopyridine (4-AP, 50 microM), perfused in rat hippocampal slices from postnatal days 2-30 (P2-P30), induced in the CA3 area the appearance of spontaneous epileptiform discharges, short (interictal-like) and sustained (ictal-like), as well as slow potential. The duration of epileptiform discharges decreased and their rate of occurrence (frequency) increased with maturation: ...

Wortmannin, a selective inhibitor of phosphatidylinositol 3-kinase (P13K), was found to give a dose and time-dependent, bimodal effect-initial increase, followed by decrease on the tight junction integrity of MDCK-1 monolayers, as assessed by electrical resistance measurement of the epithelia. Moreover, dihydrocytochalasin B inhibited the wortmannin-induced alteration, whereas cytochalasin B had ...

"The study seeks first to ascertain whether the age profile of net migration [in coastal New South Wales, Australia] varied during the period 1976-91.... The second aim is to determine whether or not the impact of net migration on population growth remained constant throughout the period 1976-91. Thirdly, the study ...

"Have regional disparities in Canada changed over the past thirty years? This paper assesses the robustness of earlier findings of convergence in the levels and growth rates of provincial per capita GDP, and then estimates the extent to which interprovincial and international migration is being influenced by regional differences in ...

"Broad-scale demographic changes have implications for state and local finance in terms of the composition of the base of revenue sources and their yields. This article examines the effect of such changes on the potential future yield of consumption-based taxes. The effect of household characteristics and composition on the consumption ...

PURPOSE: Longitudinal examination of early adolescent girls' premenarcheal expectations and postmenarcheal experiences of positive and negative menstrual related changes. METHOD: Ratings of 14 positive and negative changes were made by 80 girls on three occasions: (1) in grade 6 when girls were premenarcheal, (2) at the test occasion within six ...

BACKGROUND AND OBJECTIVE: The improvement of acne in summertime or the aggravation of acne in winter is a traditional dermatologic opinion. Ultraviolet rays are thought to be beneficial in the treatment of acne. In the existing literature there is no proof of this. The purpose of this study was to ...

The dynamic oxygen content differences were analyzed in the present study. The left main coronary artery of the anesthetized, open-chest goat was perfused at constant pressure (Pp). Pp(t), arterial flow [Qa(t)], and the arteriovenous oxygen content difference [a-vO2(t)] were averaged per beat. The a-vO2 signal was corrected for mixing processes ...

Examines the potential for reducing the dysfunctional consequences of demarcation between work groups and professions in the NHS. Suggests that change may be achieved by interpreting and manipulating rituals which preserve the negative aspects of professional and work group autonomy. Discusses a number of rituals observed in a case study ...

This study addressed changes in interneuron driving in the dentate gyrus (DG) of urethane-anaesthetized rats in response to tetanic stimulation of the perforant path (PP) or the converging dentate commissural pathway (CP). Using an extracellular tungsten electrode, we recorded from putative interneurons in the DG that fired to stimulation of ...

Autoradiographic studies with 3H-fucose have shown that this precursor of polysaccharide compounds is incorporated into manubria and antheridial mucilage of Chara vulgaris both in the light and in the darkness. The dynamics of this process is lower in total darkness. The decrease in overall labelling of antheridium (manubria and mucilage) ...

To investigate changes in motility of the extrahepatic biliary system associated with emesis, we measured the volume of the gallbladder and flow resistance through the sphincter of Oddi, as well as antral and duodenal contractilities before and during retching in decerebrate paralyzed dogs. Motilities of the gallbladder, sphincter of Oddi, ...

To evaluate biochemical changes of inner ear fluid following perilymphatic fistula (PLF), free amino acid (FAA) profiles of perilymph in experimental PLF were determined using high performance liquid chromatography (HPLC). Thirty-five guinea pigs were anesthetized and prepared as PLF models by perforating the round window membrane (RWM) of the left ...

Long-term electrical impedance measurements are affected by specific errors. Electrode failure, changes in its impedance due to aging, and postural changes are among the most important. We analyse errors due to electrode replacement and body postural changes. Electrode replacement errors can cause impedance changes up to 5% of basal value. ...

This study examined the occupational experiences of deans of medicine during five decades, 1940-1992, to explore whether changes in their prior career paths could explain the increasing turnover of deans that occurred during this period. The results indicate that deans are now more likely to have had previous administrative experience, ...

Strenuous exercise has been reported to affect various aspects of visual and ocular function. In the first of two experiments, the effects of cycling, jogging and stair running on a range of visual functions were examined. None of these forms of exercise was found to have any significant effect on ...

Pathological aspects in 100 cases of operated A.P. different in severity are not strictly related to aetiological conditions. Clinical observations have suggested some components of pathogenesis: obstruction of bilio-pancreatic inflow in duodenum at the beginning of the attack, bilio-pancreatic reflux on cholangiograms, strong secretory digestive stimulation before attack. Some experimental ...

A prospective record of all patients receiving home parenteral nutrition (HPN) in Tayside since 1980 has been used to audit the effect of experience and specific policy changes on HPN related complications. Total HPN related complications fell significantly over the years from 1.59 complications per treatment year during the initial ...

The relationship between intracellular period modulation and external environment change was investigated from the viewpoint of internal information coding in Physarum plasmodium. For the external conditions, concentration changes of attractant (galactose) and repellent (KCl) were used, and the internal responses were measured as the thickness oscillation of the plasmodium. (i) ...

Long-term stability studies on the WHO second primary International Reference Preparation (IRP) for thromboplastin (human plain BCT/253) stored at -20 degrees C have been conducted for ten years. Three centres took part in the exercise using frozen normal and coumarinised plasma samples which were tested throughout. There has been no ...

ECW, and particularly its interstitial component, expands easily with malnutrition, sepsis, and trauma and after aggressive intravenous fluid therapy. In this scenario, hypoalbuminemia is usually the result of both an increased capillary escape rate due to leaky endothelium and increased distribution volume; this can be worsened by artificial intravenous nutrition ...

Although the histology and ultrastructure of the human endometrium are well documented, it is clear that morphometry can reveal subtle changes in cellular biology, especially when combined with suitable sampling and dating of the specimen. These changes reflect functional events, such as protein secretion, which may be studied using the ...

We used a linearized magnetometer to measure the changes in rib cage and abdominal dimensions which occurred during induction of anaesthesia with i.v. methohexitone when spinal movement was prevented. By plotting the changes on an adaptation of the Konno and Mead plot, we inferred changes in chest wall volume, which ...

Rayleigh matches for foveal, temporally alternating fields showed only a small increase in the log green/red matching ratio (0.03--average of 10 observers) as the field was decreased from 116 to 19 min arc. This is consistent with only a small, 10%, change in photopigment density or lengthening of the cone ...

The present study focuses on the sequential development of myocardial ultrastructural changes produced by oxygen radicals. Isolated rat hearts were perfused with oxygen radicals, generated by hypoxanthine and xanthine oxidase, for 5 and 10 min followed by a 35-min recovery period. The frequency of, and the association between, ultrastructural changes ...

In an effort to determine the functionality of palmitoylation in rhodopsin, a number of physicochemical properties of depalmitoylated rhodopsin were monitored. Approximately 70% of the rhodopsin was depalmitoylated in rod outer segments by a mild hydroxylamine treatment that resulted in minimal bleaching of rhodopsin. Subsequent purification by affinity chromatography could ...

During the Irish famine of 1846-1851 there were an estimated 1.0 million excess deaths, the migration of 1.3 million persons, and 300,000 averted births. To assess the influence of population changes at the local level in Ulster, decennial census records were analyzed for the Barony of Upper Ards, County Down, ...

We investigated the postcaloric nystagmus related to positional change. Twenty-two healthy subjects were examined (experiment 1). A caloric test was carried out in the supine position. Following the cessation of the primary phase, the subject was reoriented to the upright position. An additional 10 subjects were also examined with other ...

The tear substitute Lacrozym has been compared with Tears Naturale in a double-blind study. Baseline tear film break-up time, efficiency by determining the maximum of the break-up time values after tear substitute administration, and retention time has been established. A similar increase of break-up time values were found after 10, ...

Monaural occlusion during early life causes adaptive changes in the tuning of units in the owl's optic tectum to interaural level differences (ILD) that tend to align the auditory with the visual map of space. We investigated whether these changes could be due to experience-dependent plasticity occurring in the auditory ...

Sixteen men were tested under conditions where they viewed the same segment of erotic film on many occasions or engaged repeatedly in the same erotic fantasy. Decrements in penile tumescence and subjective sexual arousal over trials were accompanied by reports from Ss that they felt less absorbed in the events ...

Changes in electrical resistance (delta R), water (delta H2O), and blood variables (Na+, K+, Cl-, protein [Pr], osmolality [Osmo], hemoglobin [Hb], and hematocrit [Hct]) were monitored during hemodialysis in 20 subjects. Average delta H2O was 1.69 +/- 0.91 liters. Blood, R, and circumferences (C) were measured for the upper limb ...

In Limulus ventral photoreceptor cells the time-course of the desensitization of InsP3 response was measured by an injection-pair paradigm. Pressure pulses of InsP3 were delivered into the cell with various interpulse intervals. The desensitization of the response to the second injection of each pair approached totality at 200 ms, which ...

Farmed mussels were artificially contaminated with a pure culture of an Alexandrium tamarense toxic strain (MOG 835), to assess the effect of initial toxicity on paralytic toxin change during the depuration process. As previously observed in mussel, gonyautoxin GTX2 is eliminated more slowly than other gonyautoxins. A toxic level (1300 ...

The purpose of this study is to evaluate the effect of one abrasive cleaner, one non-abrasive cleaner and one non-abrasive alcohol-based cleaner on the lens parameter stability of the NOVALENS. Twenty-four lenses, all NOVALENS material of identical design, were cleaned 100 times each. Eight lenses were cleaned with MiraFlow (CIBA ...

Detailed investigations of high latitude sequences recently collected by the Ocean Drilling Program (ODP) indicate that periods of rapid climate change often culminated in brief transient climates, with more extreme conditions than subsequent long term climates. Two examples of such events have been identified in the Paleogene; the first in ...

The laser absorption spectrophotometric technique was used to continuously monitor jugular bulb oxygen saturation (SjO2), and thus to calculate arteriovenous oxygen differences (AVDO2), in three subgroups of intensively monitored, severely head injured patients. We have used this data to address two questions: 1. How do cerebral and systemic haemodynamic changes ...

Postnatal development of the neuro- and viscerocranium with special reference to the maxillodental structures was studied morphometrically by analyzing computer tomograms and radiograms of human and monkey heads of different age groups. The following parameters were used: the prognathic angle, the clivus angle, the palate-incisivus angle, the interincisival angle and ...

The frequency of thyrotoxicosis in peace and war time periods was compared in the same region with the same population. In one year peace and war time periods 54 and 87 cases of thyrotoxicosis were found, respectively, which indicates the increase for 62%. The results point to the conclusion that ...

The comparatively good fossil record of post-Palaeozoic echinoids allows rates of morphological change to be estimated over the past 260 million years and compared with rates of molecular evolution. Parsimony analysis of morphological data, based predominantly on skeletal characteristics, and parsimony, distance and maximum likelihood analyses of molecular data, from ...

The rate of change of pH caused by the hydrolysis of urea was measured for urease solutions of 18 different concentrations. Concentrations were converted into an activity, A (measured in IU/cm3), by using a titrimetric method to assay the urease sample. For activities in the range 0.6-38 IU/cm3, A was ...