(n.) The act, art, or practice of engraving by means of acid which eats away lines or surfaces left unprotected in metal, glass, or the like. See Etch, v. t.
(v. t.) A design carried out by means of the above process; a pattern on metal, glass, etc., produced by etching.
(v. t.) An impression on paper, parchment, or other material, taken in ink from an etched plate.
Example Sentences:
(1) After permeabilization, with attendant partial extraction, the preparation can be fixed, then viewed by either deep-etch replication, or by high-resolution scanning electron microscopy, with structure of interest revealed in deep view.
(2) The freeze-etch technique was used to study the morphology of Treponema refringens (Nichols).
(3) A thorough dental prophylaxis before acid-etching of enamel is often recommended.
(4) The results of the rapid-freeze and deep-etch procedure showed that the ridges observed by the surface replica method consisted of linear arrangements of elliptical particles on the ES face of the plasma membrane.
(5) All the summer deals in graphical, Etch-a-sketch form .
(6) When either predictability or bond strength was considered independently, several bracket systems, coupled with a particular etch time, had either high predictability or high bond strength.
(7) This demineralization was similar to enamel acid etched with 50% phosphoric acid for 2 mn.
(8) This study evaluated the bond strength between glass ionomer cements and laser-etched dentin.
(9) Acid etching smooths and cleans the dentinal surface.
(10) Examination of apposed replicas and deep-etched specimens indicated that at least some of the IMPs extend through the T. pallidum outer membrane and are exposed on the surface of the organism.
(11) Isolated appressed chloroplast membranes, highly enriched in photosystem II (PSII) activity, were examined by freeze-etch electron microscopy.
(12) The technique of freeze-etching for electron microscopy applied to isolated islets of Langerhans has permitted a successful evaluation of emiocytotic events on the cell surface.
(13) The tensile bond strengths of the bonding resin to the etched enamel surfaces were not significantly different.
(14) The etched porcelain laminate veneer is a new conservative treatment that offers a solution to fractured, discolored, and worn anterior teeth.
(15) SEM and TEM examinations suggested that dentinal collagen exposed by the etching but not entangled and impregnated by poly (4-META-co-MMA) easily deteriorated by water during the longer immersion.
(16) The performance of a commercial double-propane-jet freezer (Balzers QFD 101) has been assessed, for rapid freezing of fresh tissues in freeze-etch work.
(17) The purpose of this in vitro study was to determine the tensile bond strengths (TBS) of several orthodontic bonding systems and orthodontic brackets to enamel surfaces exposed to different etching procedures.
(18) We find that freeze-drying is the most reliable and easy method for molecules that withstand distilled water; freeze-etching can be successfully applied to transmembrane proteins (even in the presence of detergents or salt); the glycerol-spray technique provides an excellent alternative to the cryotechniques in particular for studies of single linear molecules.
(19) After acid etching, filtration produced a 32-fold increase in permeation.
(20) On the corresponding PF face of the plasma membrane, linear arrangements of the intramembrane particles (IMPs) of about 8 nm in diameter were observed by both the deep-etch and freeze-fracture methods.
Itching
Definition:
(p. pr. & vb. n.) of Itch
Example Sentences:
(1) The effects of the depth of injection and of skin temperature on the latency, magnitude, and duration of itch were examined.
(2) It was found that medrysone (1%) significantly improved the symptoms of itching, watering, photophobia and hyperaemia, while sodium cromoglycate (2%) was found to be ineffective.
(3) Treatments for jock itch include anti-fungal ointments and lotions, or anti-fungal pills for severe cases.
(4) The speediest effect was registered for sneezing, followed by nasal catarrh, nasal itching, and blocking.
(5) We reviewed 52 reports in the literature of the use of epidural and spinal opiates to assess the incidence of itching and found an overall incidence of 8.5% in patients receiving epidural opiates, and 46% in patients receiving spinal opiates.
(6) Side effects with OTFC were more frequent: nose itching occurred in 65%, body itching in 10%, and vomiting in 30%.
(7) Itching appeared before erythema in 83% of subjects and within 5-8 min after instillation of the allergen.
(8) Topical BDP by both methods of delivery was rapidly effective in decreasing mean nasal obstruction, rhinorrhea, sneezing, and itching symptoms as well as mean eye symptoms with no statistically significant differences between them.
(9) Chlorpheniramine given alone produced no significant benefit whilst cimetidine alone produced a marked exacerbation in itching in nearly half the patients who initially entered the study and was sufficient to require withdrawal.
(10) But the ad any American politico worth his salt would be itching to make would open thus.
(11) The treatment proved to be effective in those with toxicoderma, secondary xanthomatosis, porphyria cutanea tarda, skin itching, and urticaria, particularly in the cases when toxic exposures and gastrointestinal conditions contributed to the disease pathogenesis.
(12) Degrees of itching were estimated before and for 6 months after a fourth dose of ivermectin or placebo was given to 97 subjects in Sierra Leone.
(13) "Itching" was the most frequent complaint, encountered in 20 (69%) of the study patient.
(14) For the time is coming when people will not put up with sound doctrine, but having itching ears, they will accumulate for themselves teachers to suit their own desires, and will turn away from listening to the truth and wander away to myths."
(15) And even more scary, I have a drillion moles all over my body, some of which have now started itching, on my back.
(16) PUPP is a specific eruptive dermatosis in pregnancy, clinically characterized by erythematous papules and plaques with intense itching in periumbilical localization.
(17) Severity of itching was determined by a visual linear analogue scale.
(18) Giant papillary conjunctivitis (GPC) is largely a soft contact lens-related syndrome, characterized by the formation of giant papillae on the upper tarsal conjunctiva, itching, excess mucus, erythema, and contact lens intolerance.
(19) Therapeutic response was assessed according to the suppression of symptoms and symptom diary scores of daily itching and frequency, number, size, and duration of hives.
(20) The study which was carried out in 20 patients confirmed the lack of collateral effects on the fetus, mother (except for slight itching in 25% of cases) and the progress of labour.