Join Us On An Exhilarating Adventure
Prepare yourself for towering cliff systems, huge cave entrances, pristine wilderness areas and spectacular wildlife. Unlike traditional tours, Eco Quest Expeditions invites you to be part of a unique conservation effort. Tour fees directly support biodiversity conservation in Belize's Chiquibul forest, through our collaboration with Friends for Conservation and Development, a non-profit leader in conservation in Belize since the late 1990s. Take home memories of haunting natural beauty and the knowledge that your presence is helping to save threatened habitats and species in Belize. We promise to take you to areas rarely seen!
Jump to main content nature. Com homepage publications a-z index browse by subject my account submit manuscript register subscribe rcophth login cart search advanced search eye journal home > archive > proceedings of cambridge ophthalmological symposium > full text > figures and tables figures and tables from: pathobiology of epiretinal and subretinal membranes: possible roles for the matricellular proteins thrombospondin 1 and osteonectin (sparc) p hiscott, s hagan, l heathcote, c m sheridan, c p groenewald, i grierson, d wong and l paraoan back to article figure 1. generic viagra canada (a) section through proliferative diabetic retinopathy epiretinal membrane (e) and underlying retina (r) stained with the immunoperoxidase technique for collagen ii (haematoxylin counterstain). Note a prominent layer of collagen ii (demonstrated red) within the epiretinal membrane. The vitreoretinal interface is labelled (arrows). generic low price viagra (b) section of a proliferative vitreoretinopathy (pvr) epiretinal membrane stained by the immunofluorescent technique for collagen i. prescription-free viagra Collagen i is abundant. Folded inner limiting lamina can be seen around the edge of the section (arrows). generic viagra online overnight delivery (c) haematoxylin and eosin-stained section of a pvr epiretinal membrane which has formed in the presence of the tamponade agent perfluorohexyloctane (f6h8). Numerous macrophages are present. In addition, multinucleated giant cells (black arrows) are adjacent to spherical extracellular spaces (yellow arrows). generic viagra canada These spaces are presumed to have contained f6h8. The inflammatory response may constitute a foreign body-type reaction to emulsified tamponade agent. (d) autoradiograph of section through folded, tractionally-detached retina (r) with overlying epiretinal membrane (m top) and underlying subretinal membrane (m bottom). The section has been labelled by in situ hybridisation with an antisense radiolabelled probe for fibronectin mrna (haematoxylin counterstain). cheapest prices on generic viagra The periretinal membranes contain many cells with abundant fibronectin mrna (which appear black in the section from intense silver grain deposition over these cells—arrows), whereas cells in the retina exhibit only background labelling. (e) and (f) sections through a peripheral retinectomy specimen stained with the immunoperoxidase method (brown reaction product, haematoxylin counterstain) for cytokeratins, an epithelial cell marker (e) or thrombospondin-1 (tsp-1) (f). In (e), a fibroblast-like retinal pigment epithelial (rpe) cell (black arrow) can be seen on the retina (r). order viagra no prescription In (f) this cell is noted to stain for tsp-1 (black arrow) while a macrophagic cell contains some of the glycoprotein as well (red arrow). buy generic viagra online overnight Both cells contain melanin granules while other epiretinal elements also contain tsp-1. (g) and (h) sections through a pvr subretinal membrane stained with the immunoperoxidase method (red reaction product, haematoxylin counterstain) for cytokeratins (g) or osteonectin/sparc (h). The fibroblastic cells are chiefly of rpe cell origin as judged by their cytokeratin immunoreactivity (g) (arrows). In (h), which is a section deeper into the tissue, sparc is present in many of the fibroblastic cells but extracellular sparc is not seen. generic viagra canada Scale bars represent (a) 75 μm; (b) magnification as in (a); (c) 75 μm; (d) ccc μm; (e) 35 μm; (f) magnification as in (e); (g) 75 μm; (h) magnification as in (g). Full figure and legend (54k) figure 2. (1) pvr peripheral retinectomy specimen stained with the immunoperoxidase method (red reaction product, haematoxylin counterstain) for sparc. The retina (r) and epiretinal blood (b) are marked. Epiretinal cells containing sparc can be seen (arrow) and there is sparc immunoreactivity in epiretinal blood. non prescription viagra (b) a section showing choroid (c) and retinal pigment epithelial monolayer beneath an area of retinal detachment. The section has been stained with the immunoperoxidase method (red reaction product, haematoxylin counterstain) for sparc. Note sparc immunoreactivity in choroid and rpe monolayer, including a rpe cell apparently detaching from the monolayer (arrow). (c) and (d) rpe cells seeded at equal numbers onto a glass slide (to which rpe cells adhere) precoated with fibronectin (c) and sparc (d). Note the far greater rpe cell attachment and spreading in the presence of fibronectin than in the presence of sparc. Scale bars represent (a) 35 μm; (b) magnification as in (a); (c) cc μm; (d) magnification as in (c). Full figure and legend (52k) figure 3. (a) proliferative and (b) migratory response of retinal pigment epithelial (rpe) cells to scatter factor/hepatocyte growth factor (hgf). (a) proliferation of rpe cells grown in 20% fetal calf serum (20% fcs) in ham’s f10 (f10) which serves as a positive control, serum free (sf) f10 as a negative control, and increasing concentrations of hgf in 2% fcs/f10. Error bars represent sd. generic viagra canada * = statistically significant increase in proliferation over 2% fcs/f10 without added hgf (0) which was set to 100% (mts assay, anova with bonferroni p < 0. sales online viagra 05). (b) cells migrating per high power field to the following agents: fibronectin (fn: 10 μg ml−1 fn in f10; positive control) and increasing concentrations of hgf in f10. Error bars represent sd. * = statistically significant increase in numbers of migrated cells over f10 with. generic viagra canada Monitoring the Magnificent Scarlet Macaw
Upper Macal River, Chiquibul National Park, Belize
Join Chiquibul National Park rangers and jungle experts on an exclusive day long expedition, among vistas of the Mountain Pine Ridge and Chiquibul forest. We will take a skiff down the winding upper Macal river and view macaws eating in the Quamwood trees, flying and nesting. Keep an eye out for crocodiles, tapirs and other wondrous bird life. You can assist rangers in monitoring these glorious birds and help ensure their future.
Monitor the Largest Cave System in Central America
Chiquibul Cave System, Cayo District, Belize
Concealed beneath the forest canopy, in the shadow of archaic rock walls, lies the Chiquibul Cave System, the longest known network of caves in Central America. Hike through lush primary forest; explore 4 caves; and view ancient Maya pottery that has been dormant in the darkness for over 2000 years.
Chiquibul Wildlife Expeditions
Bird watching, river floats, camping, caving...
Belize is famous for its geological features; caves, sink holes, peaks, and for its natural limestone arches carved and sculpted over millions of years. Our experienced staff are happy to help you design an unforgettable wilderness experience.
How You Make a Difference
Adventure fees support wilderness protection, conservation programs and scientific research in the spectacular Chiquibul National Park and Forest Reserve. Help protect these gifts of nature for future generations.
Your presence provides a disincentive to poachers who destroy Scarlet Macaw nests and capture baby birds for trade.
Conservation Awareness. By steeping yourself in the majesty and vulnerability of Belize's eco-systems we believe your adventure will advance conservation efforts in Belize and beyond.