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RISS 인기검색어
- 검색키워드
- 저자 : Christopher D. Goodman (검색결과 3 건)
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Gayle I. Hansen,John A. West,윤환수,Christopher D. Goodman,Susan Loiseaux de Goër,Giuseppe C. Zuccarello 한국조류학회I 2019 ALGAE Vol.34 No.2
A new encrusting red alga was found growing abundantly on glass debris items that drifted ashore along the coasts ofOregon and Washington. These included discarded fluorescent tubes, incandescent light bulbs, capped liquor bottles,and ball-shaped fishing-net floats. Field collections and unialgal cultures of the alga revealed that it consisted of twomorphological phases: a young loosely aggregated turf and a mature consolidated mucilaginous crust. The turf phaseconsisted of a basal layer of globose cells that produced erect, rarely branched, uniseriate to multiseriate filaments up to500 μm long with closely spaced cells lacking pit-plugs. These filaments expanded in size from their bases to their tipsand released single cells as spores. At maturity, a second phase of growth occurred that produced a consolidated crust,up to 370 μm thick. It consisted of a basal layer of small, tightly appressed ellipsoidal-to-elongate cells that generateda mucilaginous perithallial matrix containing a second type of filament with irregularly spaced cells often undergoingbinary division. At the matrix surface, the original filaments continued to grow and release spores but often also eroded. Individual cells, examined using confocal microscopy and SYBR Green staining, were found to contain a central nucleus,a single highly lobed peripheral chloroplast without a pyrenoid, and numerous chloroplast nucleoids. Morphologicaldata from field and culture isolates and molecular data (rbcL, psbA, and SSU) show that this alga is a new genus and specieswhich we name Viator vitreocola, “a traveller on glass.”
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Hansen, Gayle I.,West, John A.,Yoon, Hwan Su,Goodman, Christopher D.,Goer, Susan Loiseaux-de,Zuccarello, Giuseppe C. The Korean Society of Phycology 2019 ALGAE Vol.34 No.2
A new encrusting red alga was found growing abundantly on glass debris items that drifted ashore along the coasts of Oregon and Washington. These included discarded fluorescent tubes, incandescent light bulbs, capped liquor bottles, and ball-shaped fishing-net floats. Field collections and unialgal cultures of the alga revealed that it consisted of two morphological phases: a young loosely aggregated turf and a mature consolidated mucilaginous crust. The turf phase consisted of a basal layer of globose cells that produced erect, rarely branched, uniseriate to multiseriate filaments up to $500{\mu}m$ long with closely spaced cells lacking pit-plugs. These filaments expanded in size from their bases to their tips and released single cells as spores. At maturity, a second phase of growth occurred that produced a consolidated crust, up to $370{\mu}m$ thick. It consisted of a basal layer of small, tightly appressed ellipsoidal-to-elongate cells that generated a mucilaginous perithallial matrix containing a second type of filament with irregularly spaced cells often undergoing binary division. At the matrix surface, the original filaments continued to grow and release spores but often also eroded. Individual cells, examined using confocal microscopy and SYBR Green staining, were found to contain a central nucleus, a single highly lobed peripheral chloroplast without a pyrenoid, and numerous chloroplast nucleoids. Morphological data from field and culture isolates and molecular data (rbcL, psbA, and SSU) show that this alga is a new genus and species which we name Viator vitreocola, "a traveller on glass."
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Significance of Facet Fluid Index in Anterior Cervical Degenerative Spondylolisthesis
Lee Yunsoo,Heard Jeremy C.,Lambrechts Mark J.,Kern Nathaniel,Wiafe Bright,Goodman Perry,Mangan John J.,Canseco Jose A.,Kurd Mark F.,Kaye Ian D.,Hilibrand Alan S.,Vaccaro Alexander R.,Kepler Christophe 대한척추외과학회 2024 Asian Spine Journal Vol.18 No.1
Study Design: Retrospective cohort study.Purpose: To correlate cervical facet fluid characteristics to radiographic spondylolisthesis, determine if facet fluid is associated with instability in cervical degenerative spondylolisthesis, and examine whether vertebral levels with certain facet fluid characteristics and spondylolisthesis are more likely to be operated on.Overview of Literature: The relationship between facet fluid and lumbar spondylolisthesis is well-documented; however, there is a paucity of literature investigating facet fluid in degenerative cervical spondylolisthesis.Methods: Patients diagnosed with cervical degenerative spondylolisthesis were identified from a hospital’s medical records. Demographic and surgical characteristics were collected through a structured query language search and manual chart review. Radiographic measurements were made on preoperative MRIs for all vertebral levels diagnosed with spondylolisthesis and adjacent undiagnosed levels between C3 and C6. The facet fluid index was calculated by dividing the facet fluid measurement by the width of the facet. Bivariate analysis was conducted to compare facet characteristics based on radiographic spondylolisthesis and spondylolisthesis stability.Results: We included 154 patients, for whom 149 levels were classified as having spondylolisthesis and 206 levels did not. The average facet fluid index was significantly higher in patients with spondylolisthesis (0.26±0.07 vs. 0.23±0.08, p <0.001). In addition, both fluid width and facet width were significantly larger in patients with spondylolisthesis (p <0.001 each). Cervical levels in the fusion construct demonstrated a greater facet fluid index and were more likely to have unstable spondylolisthesis than stable spondylolisthesis (p <0.001 each).Conclusions: Facet fluid index is associated with cervical spondylolisthesis and an increased facet size and fluid width are associated with unstable spondylolisthesis. While cervical spondylolisthesis continues to be an inconclusive finding, vertebral levels with spondylolisthesis, especially the unstable ones, were more likely to be included in the fusion procedure than those without spondylolisthesis.
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