Gingival and Periodontal Conditions As Related to Menstruation and Endocrine Disorders in the Female

An introductory note is followed by a short discourse on the history of periodontal disease, with particular emphasis on the conditions which are discussed in the treatise. The normal clinical and microscopical features of the gingiva and periodontal membrane are summarised and illustrated. A summary of the mechanism of the menstrual cycle is given, this being followed by a classification and summary of the aetiological factors of periodontal disease. The results of the research are given. These are based on the observations noted during the examination and treatment of 250 female patients for periodontal disease. Also taken into account are the microscopical findings of the examination of gingival tissue removed from these patients at various stages in their menstrual cycles. The results of observations were noted after the examination and treatment of nineteen cases of known endocrine disorders. A discussion is included. This part of the thesis is presented in two main sections. The first section deals with the gingival changes which occur during the normal menstrual cycle, and also the gingival changes which take place in endocrine disorders which may influence the ovarian cycle. The changes which occur in the basal cell layer of the gingival epithelium are illustrated and discussed as are the changes which take place in the cornified surface layer of the gingival epithelium. A similar account is given of the blood vessel changes which take place in the gingival connective tissue during the menstrual cycle. It is shown that these changes are similar to the changes which take place in the endometrium and the epithelium of the vagina. Periodontal disease in cases of known endocrine imbalance is discussed and illustrated, and it is recorded that recurrence of periodontal disease in many of these cases is associated with recurrence of the endocrine imbalance reflected in the ovarian cycle. The rate of healing and discomfort following gingivectomy is discussed, and it is shown that rapid healing and little post-operative discomfort can be expected in the proliferative phase, but slow healing and much discomfort follow gingivectomy in the progestational phase of the cycle. Oral ulceration of a cyclical nature is shown to be associated with irritation of the mucosa in the progestational phase of the cycle, while oral ulceration of a more acute nature, apparently associated with emotional stress is discussed. Desquamative gingivitis at the menopause is considered. The second section of the discussion is devoted to the treatment of periodontal disease during the normal menstrual cycle, during pregnancy, at the menopause, and in disorders of the endocrine system. It is stated that, when the complete co-operation of the patient is obtained, periodontal treatment is successful even when the cyclical gingival changes are very obvious. Periodontal treatment in pregnancy is best performed after the second month and before the end of the sixth month of pregnancy since healing is rapid and discomfort minimal during this period of four months. It is considered that periodontal treatment in cases of desquamative gingivitis can be successful when the patient co-operates and all sources of irritation are removed, and the epithelium stimulated to activity with oestrogen. In cases of medically controlled endocrine disorders, periodontal treatment is possible. A summary of the case histories of 100 patients has been included as an appendix. A bibliography appears at the end of each chapter of the treatise

Final shuttle-derived atmospheric database: Development and results from thirty-two flights

The final Shuttle-derived atmospheric data base is presented. The relational data base is comprised of data from 32 Space Transportation System (STS) descent flights, to include available meteorology data taken in support of each flight. For the most part, the available data are restricted to the middle atmosphere. In situ accelerations, sensed by the tri-redundant Inertial Measurement Unit (IMU) to an accuracy better than 1 mg, are combined with post-flight Best Estimate Trajectory (BET) information and predicted, flight-substantiated Orbiter aerodynamics to provide determinations up to altitudes of 95 km. In some instances, alternate accelerometry data with micro-g resolution were utilized to extend the data base well into the thermosphere. Though somewhat limited, the ensemble of flights permit a reasonable sampling of monthly, seasonal, and latitudinal variations which can be utilized for atmospheric science investigations and model evaluations and upgrades as appropriate. More significantly, the unparallel vertical resolution in the Shuttle-derived results indicate density shears normally associated with internal gravity waves or local atmospheric instabilities. Consequently, these atmospheres can also be used as stress-atmospheres for Guidance, Navigation and Control (GN and C) system development and analysis as part of any advanced space vehicle design activities

Cross-hole seismic reflection surveying in coal measures

This thesis is concerned with the development of the cross-hole seismic reflection surveying method with particular application to the shallow Coal Measures strata found in opencast coal mining prospects in the U.K.A field acquisition technique developed for shallow boreholes utilising explosive sources and hydrophone receivers is described. Data have been acquired from several test sites in northern England. Data-processing techniques including wavefield separation and waveshaping deconvolution have been developed for cross-hole data and the theories behind these techniques are discussed. Methods of imaging cross-hole reflection data including the 'VSP-CDF transformation and Generalised Kirchhoff migration are applied to computer- generated synthetic data and to real data in order to yield a depth section of the seismic reflectivity between the boreholes. Finally, the data-processing and imaging techniques developed are applied to real data acquired at British Coal Opencast exploration sites in northern England between 1987 and 1990

Plato\u27s Unwritten Dialectic of the One and the Great and Small

In this essay Findlay summarizes his position that the Unwritten Doctrines of Plato, as outlined by Proclus, are essential for understanding the ontological theories of Plato\u27s major dialogues. A. Preu

Shuttle derived atmosphere

The shuttle descends along a rather shallow path, thus providing some information on the horizontal structure of the atmosphere. Small scale structures were suggested (shears, potholes). The best estimates of the shuttle drag coefficient and projected areas are used to go from accelerometer data to density through the use of BET's (Best Estimated Trajectories). Data are from the IMU's (Inertial Measurement Unit) and the HiRAP (High Resolution Accelerometer Package)

Influence of birth weight, sex, age and adiposity on central leptin and insulin sensitivity in young growing sheep, as indicated by changes in voluntary food intake

Non peer reviewedPublisher PD

Central and peripheral insulin resistance in a large animal model of obesity

Non peer reviewedPublisher PD

STS-40 descent BET products: Development and results

Descent Best Estimate Trajectory (BET) Data were generated for the final Orbiter Experiments Flight, STS-40. This report discusses the actual development of these post-flight products: the inertial BET, the Extended BET, and the Aerodynamic BET. Summary results are also included. The inertial BET was determined based on processing Tracking and Data Relay Satellite (TDRSS) coherent Doppler data in conjunction with observations from eleven C-band stations, to include data from the Kwajalein Atoll and the usual California coastal radars, as well as data from five cinetheodolite cameras in the vicinity of the runways at EAFB. The anchor epoch utilized for the trajectory reconstruction was 53,904 Greenwich Mean Time (GMT) seconds which corresponds to an altitude at epoch of approximately 708 kft. Atmospheric data to enable development of an Extended BET for this mission were upsurped from the JSC operational post-flight BET. These data were evaluated based on Space Shuttle-derived considerations as well as model comparisons. The Aerodynamic BET includes configuration information, final mass properties, and both flight-determined and predicted aerodynamic performance estimates. The predicted data were based on the final pre-operational databook, updated to include flight determined incrementals based on an earlier ensemble of flights. Aerodynamic performance comparisons are presented and correlated versus statistical results based on twenty-two previous missions