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Topic: Bowman's membrane


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In the News (Wed 22 May 19)

  
 Encyclopedia: Sir William Bowman
Bowman's membrane — the anterior limiting membrane in the cornea After completing his surgical training in 1844, Sir Bowman practised as an ophthalmologist at the Royal London Ophthalmic Hospital (later known as Moorfields Eye Hospital).
Sir Bowman left Birmingham in 1837 to further his training as a surgeon and attended King's College, London, where he served as a prosector under Robert Bentley Todd, a professor of physiology.
Sir William Bowman ( July 20, 1816- March 29, 1892) was a British surgeon and anatomist.
www.nationmaster.com /encyclopedia/Sir-William-Bowman

  
 LaserMyEye :: Encyclopedia :: Basement membrane
The basement membrane is a membrane of tissue beneath the epithelium which helps the epithelium adhere to the Bowman's layer or stromal tissue.
A poor basement membrane resulting in loosely adhering epithelium will put LASIK patients at far higher risk of serious epithelial defects, extremely slow healing and severe chronic dry eye after surgery.
For patients getting LASIK, it is very important that the basement membrane be in good condition.
www.lasermyeye.org /encyclopedia/basementmembrane.html   (147 words)

  
 Special Senses I: The Eye
The cells of the corneal epithelium sit on a thick basal lamina, Bowman's membrane, (named for Sir William Bowman, 1816-1892, the English ophthalmologist, anatomist and physiologist).
It is possible to remove the cornea, freeze it, and actually machine it in a small lathe-like device to alter its curvature, then stitch it back into place, with different focusing characteristics!
The corneal epithelium varies in thickness among different species, and if you have trouble finding in on this slide, try slide 268, where it should be very evident.
education.vetmed.vt.edu /Curriculum/VM8054/Labs/Lab11/Eye/eyelab.htm   (147 words)

  
 Bowman's membrane
The Bowman's membrane is named after Sir William Bowman ( 1816- 1892), an English physician, anatomist and ophthalmologist, who discovered this membrane.
If the Bowman's membrane is damaged, scarring would normally occur.
The Bowman's membrane is a smooth layer in the eye.
www.mcfly.org /wik/Bowman%27s_membrane   (147 words)

  
 WU Libraries Bio Dept 1997 pubs
Craig, C. "Multiple Isoforms of…" see:Benyajati, C. Cullen, P.J., Kaufman, C.K., Bowman, W.C., and Kranz, R.G. "Characterization of the Rhodobacter capsulatus Housekeeping RNA Polymerase" Journal of Biological Chemistry 272:43 (Oct.24, 1997): 27266-27273.
Khalkhali-Ellis, Z., Collin-Osdoby, P., Li, L., Brandt, M.L. and Osdoby, P. "A Human Homolog of the 150 kD Avian Osteoclast Membrane Antigen Related to Superoxide Dismutase and Essential for Bone Resorption is Induced by Development Agents and Opposed by Estrogen in FLG 29.1 Cells" Calcified Tissue International 60 (1997): 187-193.
Gabbert, K. K., Goldman, B.S. and Kranz, R.G. "Differential Levels of Specific Cytochrome c Biogenesis Proteins in Response to Oxygen: Analysis of the ccl Operon in Rhodobacter capsulatus" Journal of Bacteriology 179:17 (Sept., 1997): 5422-5428.
www.library.wustl.edu /units/biology/reprints/1997.html   (2678 words)

  
 Corneal injury for medical students and primary care physicians
Note that corneal abrasions generally do not cause scarring upon healing because the Bowmans membrane is not violated.
Corneal ulcer is a defect that involve the stroma, past Bowmans membrane.
Shady Awwad, MD A corneal abrasion is an injury to the epithelium that is superficial enough not to involve the basement membrane.
www.eyeweb.org /ulcer.htm   (2678 words)

  
 eMedicine - Corneal Erosion, Recurrent : Article by Arun Verma, MD
Recurrent corneal erosions occurring after injury or any corneal insult result because of improper or inadequate healing of the basement membrane, either because the basal epithelial cells fail to produce proper basement membrane complexes to attach to the Bowman layer and stroma or because of faulty basement membrane adherence.
Recurrent corneal erosions and epithelial basement membrane dystrophy are usually bilateral and are characterized by various patterns of dots, parallel lines that mimic fingerprints, and patterns that resemble maps, which appear in the epithelium.
Recurrent corneal erosion is an indication for the use of a therapeutic lens.
www.emedicine.com /oph/topic113.htm   (6763 words)

  
 LaserMyEye :: Encyclopedia :: Corneal stroma
The thickest layer of the cornea, between the Bowman's membrane and the Descemet's membrane.
In LASIK, a flap of tissue comprising epithelium, Bowman's PLUS a considerable part of the stroma is cut and lifted and the laser is applied to the stroma remaining under the flap before the flap is replaced.
The corneal stroma is the part of the cornea that is re-shaped in laser eye surgery.
www.lasermyeye.org /encyclopedia/stroma.html   (230 words)

  
 glomerular filtration rate
rate at which plasma is filtered by the glomerular filtration membrane into Bowman's space; determined by the permeabiliy of the membrane, hydrostatic pressure in the glomerular capillaries and Bowman's space, and the colloid osmotic pressure exerted by the proteins of the capillary plasma.
crisp.cit.nih.gov /Thesaurus/00003333.htm   (43 words)

  
 Altered expression of the 100 kDa subunit of the Dictyostelium vacuolar proton pump impairs enzyme assembly, endocytic function and cytosolic pH regulation -- Liu et al. 115 (9): 1907 -- Journal of Cell Science
Bowman, E. J., O'Neill, F. and Bowman, B. Mutations of pma1, the gene encoding the plasma membrane H+-ATPase of Neurospora crassa, suppress inhibition of growth by concanamycin A, a specific inhibitor of vacuolar ATPases.
Serrano, R. In vivo glucose activation of the yeast plasma membrane ATPase.
ATPases entails additional ATP consumption, activation of this
jcs.biologists.org /cgi/content/full/115/9/1907   (8638 words)

  
 Virtual Hospital: Atlas of Microscopic Anatomy: Section 5: Muscular Tissue
Each striated skeletal muscle fiber is supplied with a nerve fiber ending on a specialized region of the cell membrane or sarcolemma, the subneural region of the motor end plate.
Characteristically, the nuclei of skeletal muscle fibers are located peripherally adjacent to the outer limiting membrane or sarcolemma.
The usual (normal) position of skeletal muscle nuclei and the discovery of the sarcolemma is credited to Bowman (1840).
www.vh.org /Providers/Textbooks/MicroscopicAnatomy/Section05/Section05.html   (8638 words)

  
 Kidney non-tumor
Micro: large glomeruli with accentuation of lobules; irregular thickening of glomerular basement membrane by interposition of mesangial cells between endothelium and basement membrane; causes tram track/double contour appearance (PAS or silver stain), crescents in 20%; neutrophils often present; may have hyaline aggregates of immune complexes in capillary lumina
Micro: crescents in glomeruli are proliferation of parietal epithelium of Bowmans capsule with macrophages, neutrophils, lymphocytes, fibrin, collagen; also see glomerular capillary collapse, atrophic tubules, interstitial inflammation
Micro: glomeruli are globally and diffusely enlarged and hypercellular due to neutrophils and macrophages and proliferation of mesangial and endothelial cells; swelling of endothelial cells and presence of inflammatory cells obstructs capillary lumina; returns to normal within months
www.pathologyoutlines.com /kidneypf.html   (8638 words)

  
 Cornea - eye anatomy
The adult cornea is only about 1/2 millimeter thick and is comprised of 5 layers: epithelium, Bowman's membrane, stroma, Descemet's membrane and the endothelium.
The epithelium is layer of cells that cover the surface of the cornea.
The cornea is extremely sensitive - there are more nerve endings in the cornea than anywhere else in the body.
www.stlukeseye.com /anatomy/Cornea.asp   (273 words)

  
 Clinical Specular Microscopy: Optical Principles of Specular Microscopy
The incident light illuminates, in turn, the precorneal tear film or a coupling medium (e.g., artificial tears, methyl cellulose, etc.) between the objective lens and the cornea, the epithelium, Bowman's membrane, the stroma, Descemet's membrane, the endothelium and the aqueous humor.
A portion of the reflected and backscattered light is collected by the objective lens of the specular microscope and forms, at the image plane of the microscope, an image of that part of the cornea on which the instrument is focused.
Of primary importance in clinical specular microscopy is the light that is reflected specularly (i.e.
www.bio-optics.com /articles/01/art0101.htm   (1316 words)

  
 In vivo confocal microscopy of the human cornea -- Jalbert et al. 87 (2): 225 -- British Journal of Ophthalmology
Confocal microscopy in Bowman and stromal corneal dystrophies.
Characterization of fibrous retrocorneal membrane by confocal microscopy.
In vivo confocal microscopy of patients with corneal recurrent erosion syndrome or epithelial basement membrane dystrophy.
bjo.bmjjournals.com /cgi/content/full/87/2/225   (6463 words)

  
 Articles - Ultrafiltration
The high pressure forces small molecules such as water, glucose, amino acids, sodium chloride and urea through the filter, from the blood in the glomerular capsule across the basement membrane of the Bowman's capsule and into the nephron.
UF does this by pressurizing the solution flow, which is tangential to the surface of the supported membrane (cross-flow filtration).
It is opposed by osmotic pressure(30 mmHg, 40 kPa) and hydrostatic pressure (20 mmHg, 2.7 kPa) of solutes present in capsular space.
www.zforever.com /articles/Ultrafiltration   (545 words)

  
 Cornea - eye anatomy
The adult cornea is only about 1/2 millimeter thick and is comprised of 5 layers: epithelium, Bowman's membrane, stroma, Descemet's membrane and the endothelium.
The epithelium is layer of cells that cover the surface of the cornea.
The cornea is extremely sensitive - there are more nerve endings in the cornea than anywhere else in the body.
www.stlukeseye.com /anatomy/Cornea.asp   (273 words)

  
 Distribution and serotonin-induced activation of vacuolar-type H+-ATPase in the salivary glands of the blowfly Calliphora vicina -- Zimmermann et al. 206 (11): 1867 -- Journal of Experimental Biology
Bowman, E. J., Siebers, A. and Altendorf, K. Bafilomycins: a class of inhibitors of membrane ATPases from microorganisms, animal cells, and plant cells.
Gupta, B. and Berridge, M. A coat of repeating subunits on the cytoplasmic surface of the plasma membrane in the rectal papillae of the blowfly, Calliphora erythrocephala (Meig.), studied in situ by electron microscopy.
In 5-HT-stimulated salivary glands, bafilomycin-sensitive ATPase activity is enhanced by a factor of approximately 2, whereas ouabain-sensitive ATPase activity does not change significantly.
jeb.biologists.org /cgi/content/full/206/11/1867   (5171 words)

  
 The V-type H+-ATPase in Malpighian tubules of Aedes aegypti: localization and activity -- Weng et al. 206 (13): 2211 -- Journal of Experimental Biology
Bowman, E. J., Siebers, A. and Altendorf, K. Bafilomycins: a class of inhibitors of membrane ATPases from microorganisms, animal cells, and plant cells.
Dschida, W. and Bowman, B. The vacuolar ATPase: sulfite stabilization and the mechanism of nitrate inactivation.
ATPase in electrogenesis and epithelial transport in Malpighian tubules.
jeb.biologists.org /cgi/content/full/206/13/2211   (4518 words)

  
 Lamellar Keratoplasty- Health Encyclopedia and Reference
Lamellar keratoplasty involves replacement of the patient's diseased anterior corneal stroma and Bowman's membrane with donor material.
Host endothelium, Descemet's membrane, and a part of the deep stroma are preserved.
Lamellar refractive keratoplasty involves the placement of a lenticule on or within the cornea to alter its refractive power, usually by changing its anterior curvature.
www.healthcentral.tv /encyclopedia/408/500/Lamellar_Keratoplasty.html   (4518 words)

  
 eMedicine - Corneal Abrasion : Article by Arun Verma, MD
Abrasion is a defect in the surface of the cornea that is limited to the epithelial layers and that does not penetrate the Bowman membrane.
Recurrent erosions are common complications of abrasions, particularly in patients with dystrophy of the epithelial basement membrane.
Failure to diagnose the corneal abrasion, failure to treat it adequately, failure to monitor the patient until the abrasion is healed, and failure to diagnose potentially devastating sequelae (eg, corneal ulcers) are pitfalls.
www.emedicine.com /oph/topic247.htm   (8129 words)

  
 Articles - Ultrafiltration
The high pressure forces small molecules such as water, glucose, amino acids, sodium chloride and urea through the filter, from the blood in the glomerular capsule across the basement membrane of the Bowman& and into the nephron.
In manufacturing, ultrafiltration (UF) is a pressure-driven membrane process for purifying and concentrating macromolecular (10^3 - 10^6 Da) solutions, especially protein solutions.
Ultrafiltration is a term used in manufacturing and in biology:
www.zforever.com /articles/Ultrafiltration   (545 words)

  
 Soul Music books from The Bomp Bookshelf
It hummed through every membrane in the room, saturated the gouged acoustic baffling, rising higher, louder, in a blue cloud of Kool smoke, echoing up the sooty airshaft, a Pentecostal crack in the dense city night.
There is also a history of Stax Records that Rob Bowman used as a reference for his epic history of the label.
He never forgot those who didn't achieve the success of Aretha Franklin or Tina Turner and who haven't enjoyed any comebacks, and his book offers the oral histories of seven of them: Denise LaSalle, Ruby Johnson, Carla Thomas, Bettye LaVette, Barbara Mason, Maxine Brown, and Timi Yuro.
www.bomp.com /BompbooksSoul.html   (545 words)

  
 Ophthalmology Board Review
In this case the guttata are buried with Descemet's membrane or endophytic (5 and below 1 at the arrows).
Once again hydropic epithelial changes (1), and irregular Bowman's layer (2), stromal scarring (3) and endophytic guttata that protrude posteriorly into the anterior chamber (4) are featured.
Incidence/Prevalence: Fuch’s has a variable inheritance pattern and occurs more commonly in women (12.5 to 1.0 in noted family case and 4 to 1 in sporadic cases).
www.medrounds.org /ophthalmology-board-review   (1211 words)

  
 Virtual Hospital: Atlas of Microscopic Anatomy: Section 5: Muscular Tissue
Each striated skeletal muscle fiber is supplied with a nerve fiber ending on a specialized region of the cell membrane or sarcolemma, the subneural region of the motor end plate.
The nuclei of developing muscle and of cardiac muscle are typically centrally located within the muscle fiber (Bowman, 1840).
Muscle fibers in vertebrates may be classified structurally as nonstriated, plain, or smooth; striated cardiac; or striated skeletal.
www.vh.org /adult/provider/anatomy/MicroscopicAnatomy/Section05/Section05.html   (1456 words)

  
 WU Libraries Bio Dept 1997 pubs
Khalkhali-Ellis, Z., Collin-Osdoby, P., Li, L., Brandt, M.L. and Osdoby, P. "A Human Homolog of the 150 kD Avian Osteoclast Membrane Antigen Related to Superoxide Dismutase and Essential for Bone Resorption is Induced by Development Agents and Opposed by Estrogen in FLG 29.1 Cells" Calcified Tissue International 60 (1997): 187-193.
Bowman, W.C. "Characterization of the…" see: Cullen, P. Brandi, M. "Human Homology of…" see: Khalkhali-Ellis, Z.
www.library.wustl.edu /units/biology/reprints/1997.html   (2678 words)

  
 e-Kidneys.net: Anatomy, formation of urine, urination, diseases, diuretics, acid-base balance, thirst
Blood entering the glomerulus is filtered through the capillary cell membranes, a thin basal lamina and the thin membrane of the visceral layer of Bowman's capsule.
The kidneys are located at the back of the abdominal cavity, one on each side of the spinal column with the top of each being at about the 12th thoracic vertebral level.
The interior portion of the kidney structure is called the renal medulla which is surrounded by a layer called the renal cortex.
www.e-kidneys.net   (2678 words)

  
 urine.html
Blood pressure is very high in the glomerulus forcing fluids and solutes into Bowman's capsule.
The filtration membrane is the filter, 3 parts:
Fenestrated capillary endothelium - the pores in the capillaries of the glomerulus are too small to allow blood cells through.
www.olemiss.edu /courses/bisc207/urine.html   (1405 words)

  
 Simultaneous pterygium and cataract surgery. Gulani A, Dastur YK J Postgrad Med
Pterygium is a wing shaped layer of vascularised fibroelastic tissue that arises from the limbic conjunctiva and extends over the cornea and replaces Bowman's membrane and corneal epithelium[1].
Pterygium is a common disease in tropical countries[2].
An avascular, flat pterygium smaller in size than the original pterygium reappeared in 8/30 patients (26%) while in 4 patients (14%) a vascularised thick pterygium of the same size as the one excised recurred within 6 weeks of operation.
www.jpgmonline.com /article.asp?issn=0022-3859;year=1995;volume=41;issue=1;spage=8;epage=11;aulast=Gulani   (1690 words)

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