ABSTRACT
Looping transitions occur in field-swept electron magnetic resonance spectra near avoided crossings and involve a single pair of energy levels that are in resonance at two magnetic field strengths, before and after the avoided crossing. When the distance between the two resonances approaches a linewidth, the usual simulation of the spectra, which results from a linear approximation of the dependence of the transition frequency on magnetic field, breaks down. A cubic approximation to the transition frequency, which can be obtained from the two resonance fields and the field-derivatives of the transition frequencies, along with linear (or better) interpolation of the transition-probability factor, restores accurate simulation. The difference is crucial for accurate line shapes at fixed angles, as in an oriented single crystal, but the difference turns out to be a smaller change in relative intensity for a powder spectrum. Spin-3/2 Cr3+ in ruby and spin-5/2 Fe3+ in transferrin oxalate are treated as examples.
Subject(s)
Computer Simulation , Electron Spin Resonance Spectroscopy/methods , Models, Theoretical , Electromagnetic Fields , Probability , SoftwareSubject(s)
Skin Neoplasms/etiology , Adult , Aged , Australia , Environmental Exposure , Female , Humans , Male , Middle Aged , Racial Groups , Skin Neoplasms/geneticsABSTRACT
Squamous papilloma of the cervix uteri were found in 27 patients from 147,813 consecutive cervical smears, an incidence of 1 : 5,475. These were young women (16 to 35 years of age), 17 (63%) of whom were pregnant. When this group was compared with a matched control group, a statistically significant increase in trichomonad infections and a reduction in fungal infections were observed. Smears from every patient with cervical papilloma showed dysplasia of squamous cells which, with one exception, regressed to a lesion of lesser severity, or reverted to normal. The role of cytology, histology and clinical history in the diagnosis and management of this lesion is discussed.
Subject(s)
Papilloma/epidemiology , Uterine Cervical Neoplasms/epidemiology , Adolescent , Adult , Australia , Condylomata Acuminata/epidemiology , Female , Humans , Mycoses/complications , Papilloma/complications , Pregnancy , Pregnancy Complications/epidemiology , Prospective Studies , Trichomonas Infections/complications , Uterine Cervical Diseases/complications , Uterine Cervical Neoplasms/complications , Uterine Cervicitis/complicationsSubject(s)
Activities of Daily Living , Chronic Disease/complications , Adolescent , Adult , Age Factors , Aged , Australia , Child , Child, Preschool , Disabled Persons , Female , Humans , Infant , Male , Middle Aged , Sex FactorsSubject(s)
Respiratory Tract Diseases/epidemiology , Age Factors , Asthma/epidemiology , Australia , Bronchitis/epidemiology , Child , Child, Preschool , Common Cold/epidemiology , Cough/epidemiology , Female , Humans , Infant , Laryngismus/epidemiology , Male , Respiratory Tract Diseases/diagnosis , Rhinitis, Allergic, Seasonal/epidemiology , Seasons , Sex Factors , Surveys and Questionnaires , Time FactorsSubject(s)
Blood Pressure Determination , Furosemide/therapeutic use , Methyclothiazide/therapeutic use , Adult , Ambulatory Care , Blood Pressure/drug effects , Body Weight , Electrolytes/metabolism , Female , Furosemide/administration & dosage , Humans , Hypokalemia/prevention & control , Male , Methyclothiazide/administration & dosage , Middle Aged , Renin/bloodABSTRACT
On the basis of data gathered from long term residents of 3 widely separated regions of Queensland a multivariate analysis has been made to determine the influence of a number of factors in the aetiology of skin cancer and solar keratosis. Factors considered were age, sex, susceptibility to sunburn, complexion, eye colour, ancestry, occupation, clothing habits and residential district. For both sexes, both diseases and all age groups the factor "susceptibility to sunburn" proved to be the most powerful single discriminant. On the whole it appeared that the genetically based factors as a group provided more information on susceptibility than the environmental factors. The relative importance of "occupation" remains in some doubt. In the tropical area away from the coast it appears to be of considerable importance. In coastal areas its influence appears to be blunted, presumably by factors such as sports and recreation habits.
