(a.) Pertaining to, or designating, any photographic process in which a printing surface is obtained without the intervention of hand engraving.
Example Sentences:
(1) Cutting the optic nerve blocks all structural changes, both endogenous and photomechanical.
(2) The photomechanical response of the vertebrate iris sphincter pupillae isolated from irises of many species of vertebrates contract when light is shined on them.
(3) Spontaneous activity was recorded in irides towards the end of the second postnatal week just prior to the time of normal eye opening, and may reflect the onset of photomechanical coupling.
(4) It is felt that cone photomechanical responses are minimal.
(5) Upon adaptation from light to dark, the most striking photomechanical response is a proximal broadening of the cone cells, which results in a 38-fold increase in cross-sectional area of the aperture.
(6) Several laboratories have suggested that melatonin may be involved in photoreceptor outer segment disc shedding, photomechanical movements, and neuromodulation, but the cellular location of the retinal synthesizing enzymes has not been determined yet.
(7) It appears that the cell membranes of the constituent smooth muscle cells contain rhodopsin which triggers the photomechanical response (PMR) when bleached.
(8) Laser dosimetry for photothermal and photomechanical interactions is outlined.
(9) Photomechanical changes with adaptive state could be identified.
(10) The retinae of lower vertebrates undergo a number of structural changes during light adaptation, including the photomechanical contraction of cone myoids and the dispersion of melanin granules within the epithelial pigment.
(11) Rods and perhaps also cones are capable of photomechanical movements.
(12) Daylight induces photomechanical movements, enhancing the endogenous daytime changes that decrease photon catch.
(13) Rod and cone contributions to the fast P III response were separated by taking advantage of photomechanical movements of the photoreceptors to produce "all-rod" and "all-cone" retinae.
(14) The time courses of isometrically recorded photomechanical responses of isolated sphincter pupillae of Rana pipiens can be accurately predicted by a set of differential equations derived from phosphorylation theory of smooth muscle contraction.
(15) Histophysiological responses such as photomechanical or retinomotor responses are influenced by temperature.
(16) This supports the hypothesis that melatonin plays an important role in the regulation of the photomechanical changes of eye pigmentation, an important element in the control of light sensitivity and acuity in the eyes of vertebrates.
(17) In a comparison of photomechanical responses of albino and normally pigmented axolotls, similar time courses and maxima of force development were found.
(18) In non-tapetal locations a few melanosomes are present that do not appear to undergo photomechanical movements.
(19) These observations would indicate that a number of morphological changes take place within the RPE cells of this species in addition to be obvious movement of melanosomes and that these changes should perhaps be included in descriptions of photomechanical or retinomotor movements.
(20) When the photoreceptors are differentiated and capable of photomechanical movement, the Müller cell in Poecilia bears a cilium situated vitreally to the external limiting membrane.