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Biomedical subjects

A Geering

Publications and source records attributed to A Geering.

9 recordsLinked to original sources
PubMed2005

The diversity of Banana streak virus isolates in Uganda.

In a study of the variation among isolates of Banana streak virus (BSV) in Uganda, 140 sequences were obtained from 49 samples by PCR across the conserved reverse transcriptase/RNaseH region of the genome. Pairwise comparison of these sequences suggested that they represented 15 different species and phylogenetic analyses showed that all species fell into three major clades based on 28% sequence difference. In addition to the Ugandan sequences, clade I also contained BSV species that are known as both integrated sequences and episomal viruses; clade II also contained integrated BSV sequences but which have not previously been identified as episomal viruses. Clade III comprised of Sugarcane bacilliform virus isolates and Ugandan BSV sequences and for which there is no evidence of integration. The possible reasons for the extraordinary levels of virus sequence variation and the potential origins and epidemiology of these viruses causing banana streak disease are discussed.

Amino Acid Sequence↗
PubMed1990

Little influence on tooth position from playing a wind instrument.

The morphology of the face and dentition of 62 adult professional wind instrument musicians was recorded with roentgencephalometry and dental casts. The musician group was comprised of 31 brass instrument players, and 31 reed instrument or flute players. The results were compared between the two subgroups and between these and a control group. The few differences found between groups were small. Overbite and upper dental arch width at the canines were smaller in the musicians than in the control group. Width at the maxillary and mandibular molars was somewhat smaller in the reed instrument and flute players than in the control group. No difference in overjet was found. Cephalometric analysis showed similar, normal facial morphology in all groups. The range of variables recorded was large in all groups.

Adolescent↗
PubMed1976

[Dynamic tomoscopy. Experimental use of a new roentgen technic for the temporomandibular joint].

A new radiographic technique and its experimental application for the temporomandibular joint is introduced. The technique was discovered some 30 years ago, then rediscovered and developed for practical use in the late 1960's by two researchers, working entirely independently. In dynamic tomoscopy, a series of underexposed radiographs (usually 8) is produced with the X-ray source at different angles with respect to the object. Each of the resultant films bears an image of the object containing all details sharp in design and without blurring. This set of films is placed as a sandwich on a special viewer. Turning a dial on the viewer brings successively into focus the laminagraphic images of any desired plane. Shifting continually from one to another throughout the entire depth of the object creates in the mind's eye a three-dimensional radiograph, a dynamic laminagram.

Humans↗
PubMed1975

[A classification of articulators].

A classification of articulators is presented. 4 categories and 9 subdivisions are based on articulator design, records required, and possible occlusal schemes.

Biomechanical Phenomena↗