Cadaveric lumbar motion segments were creep loaded for 4 hours, and the fluid content of the intervertebral discs was measured and compared with that of unloaded discs. Half of the specimens were wedged to simulate sitting with the lumbar spine flexed, and the other half were wedged to simulate sitting ...

Notochordal proteoglycans influence somite chondrogenesis. In earlier work we learned that notochord cultured under improved conditions for 8 days contains three different classes of perinotochordal proteoglycan molecules, are necessary for inducing somite chondrogenesis. When the notochords were exposed to substances causing metabolic alterations (BUdR, excess vitamin A, and hyaluronic acid), ...

Fourteen iridoid glycosides have been isolated from ODONTITES VERNA ssp. SEROTINA (Scrophulariaceae). In this paper the isolation of 6-O-beta-glucopyranosylaucubin is described; its structure and configuration has been demonstrated mainly by the aid of the (1)H- and (13)-C-NMR spectroscopy. The existence of a gamma glycosylation shift is showed.

A modification of Verhoeff's elastic tissue stain with connective tissue counterstaining is described. The modified procedure requires no differentiation of the elastic fibers, thus eliminating the problem of over- or understaining of elastic fibers. The procedure is easy to perform and yields consistently good results with sharply defined elastic fibers ...

The three-dimensional shape analysis problem is a very demanding test of shape analysis algorithms. Previous approaches to the problem have employed global features such as moments and Fourier descriptors. Global features lack the capacity for solving the partial shape recognition problem, in which only part of the unknown shape is ...

The merits of a butt joint versus a bevelled margin are reexamined. It is shown that only acute bevels are effective in reducing the marginal diffusion of plaque acid. However, acute gold bevels may give rise to other major problems in avoiding distortion of the gold during firing of the ...

Fortimicins C, D, and KE are new aminocyclitol antibiotics produced by a mutant of fortimicin-producing organisms. Their structures have been determined by 1H and 13C NMR and mass spectra and chemical degradations. Fortimicin C is 4-N-hydantoylfortimicin B, fortimicin KE is 6'-demethylfortimicin B, and fortimicin D is 4-N-glycylfortimicin KE. The last ...

Although significant progress has been made with the advent of composite restorative materials and associated techniques, the problem of marginal leakage has been lessened but not solved. The primary aim of future work must still be directed toward preventing the formation of a gap between the restoration and the tooth.

This paper discusses the problem of applying the achievements of developmental biology to organ restoration. Experiments on artificially induced transdifferentiation as a prerequisite for organ restoration are reviewed. The advantage of using cells that start differentiation from the dedifferentated state is that they can participate in the construction of new ...

A problem case is presented as it happened in family practice. The diagnosis is not revealed, because the reader is expected to participate in the solution. The management of the case is open to criticism; it is not presented as an example of faultless medicine, but as a method of ...

Total and elutriated dust concentrations were measured by four methods for typical ginning situations. Total and elutriated levels were 0.73 and 0.47 and 0.59 and 0.26 mg/m3 per bale/hr by the gin stands and bale press, respectively. Limited data show the corresponding mass media diameters are 9.2-14.8 and 9.6-18.5 micrometer.

We have discussed the maintenance system and its relationship to occlusal dynamics and occlusion function. The premise has been set forth that to avoid untoward sequelae post-orthodontically in the areas of relapse of tooth positions, occlusal wear, periodontal disease, and temporomandibular pain-dysfunction, it is best to have an occlusion free ...

Wear striations on the incisiors of Old World monkeys were examined in order to determine associations between the distributions of striations, diet and habitat preference. Significant differences exist between the Cercopithecinae and the Colobinae in respect to the orientation of incisor wear striations. In the Colobinae striations are oriented in ...

The effect of the interdental brush was evaluated on sixty-seven extracted teeth which were stained and examined under the stereomicroscope. Thirty-one of the teeth were totally covered with plaque when the interdental brush was used on them immediately before extraction. Thirty-six of the teeth were from patients who had used ...

The cusp writer is a teaching aid to facilitate understanding of the correlation between cusp angulations and the various occlusal determinants. The cusp writer provides graphic evidence that the occlusal determinants which influence configurations (i.e., incisal guidance, condylar guidance, plane [curve] of occlusion, curve of Spee [compensating curve], and plane ...

From Corydalis cava (L.) Sch. et K. (C. tuberosa DC) (Papaveraceae: genus Corydalis Med.), a mixture of alkaloids (0.53%) was isolated. The main alkaloid was (+)-bulbocapnine, and the minor alkaloids were coptisine, (+)-domestine, adlumidiceine, (+)-predicentrine, protopine, (-)-capnoidine, (+)-stylopine, (+)-isoboldine, 8-oxocoptisine, 1,2-methylenedioxy-6a,7-dehydroaporphine-10,11-quinone, and corysamine. In addition, fumaric acid was obtained. Coptisine, ...

A procedure is presented for the purification of 3 g of homogeneous methionyl-tRNA synthetase and 1 g of homogeneous tyrosyl-tRNA synthetase from 50 kg batches of Escherichia coli. The procedure permits the isolation of many enzymes simultaneously and the elution positions of seven other aminoacyl-tRNA synthetases, catalase, rhodanese, phosphofructokinase, elongation ...

It is shown that many periodontal problems can be evaluated by examining stained, extracted teeth. Presence or absence of gignival inflammation around the tooth before extraction can be established after extraction on the basis of presence or absence of plaque. Loss of attachment and its relationship to local etiological factors ...

We present a modification of the face-lift incision which avoids some of the problems we had in suturing around and behind the earlobe.

The alloimmunogenic potential of each of the tooth graft components (periodontal ligament, mineralized root surface and passenger leukocytes) was evaluated. The model employed was orthotopic tooth allografts in inbred strains of Syrian hamsters. Isolated allogenic mineralized root surface is not immunogenic, as was demonstrated by the inability of tooth grafts ...

The dentary-squamosal jaw joint evolved more than once in advanced cynodont therapsids or their descendants, probably as a buttress against the reaction force created at the articulation by the adductor jaw musculature. The multiple origin of this joint suggests that additional criteria are required to separate early mammals from advanced ...

Thesis (Ph. D.)--University of Oregon, 2005.

The Secretaries of Agriculture and the Interior joined the Western Governors' Association, National Association of State Foresters, National Association of Counties, and the Intertribal Timber Council to endorse this 10-Year Comprehensive Strategy to deal with the wildland fire and hazardous fuels situation, as well as the needs for habitat restoration ...

Bancroftian filariasis became a problem in Ceylon after the Second World War. The only vector is Culex pipiens fatigans, which is widely distributed throughout the country and is prevalent throughout the year. It is a domestic mosquito found resting mainly on hangings and household articles. Its biting hours are from ...

A technique is described which combines silver impregnation and ultrathin sectioning for the electron microscopic demonstration of fibrils in the connective tissue of the chick embryo. The electron micrographs presented in this paper provide evidence for the specificity and completeness of the silver-impregnation technique. It has been shown that, in ...