(n.) A tenacious, elastic, gummy substance obtained from the milky sap of several plants of tropical South America (esp. the euphorbiaceous tree Siphonia elastica or Hevea caoutchouc), Asia, and Africa. Being impermeable to liquids and gases, and not readly affected by exposure to air, acids, and alkalies, it is used, especially when vulcanized, for many purposes in the arts and in manufactures. Also called India rubber (because it was first brought from India, and was formerly used chiefly for erasing pencil marks) and gum elastic. See Vulcanization.
Example Sentences:
(1) The addition of amine fluorides to a copal recin (Copalite) and a chlorine caoutchouc varnish (Pergut S-40) has been studied.
(2) Isolation of pentachlorophenol is carried out from water extracts obtained from the dry caoutchouc films, so the same method can be used for examination of the rubber articles designed for the medicinetoo.
(3) The tonoplast-bound ATPase of Hevea brasiliensis (caoutchouc tree) was solubilized with dichloromethan and purified 100-fold with two ammonium sulfate precipitation steps and a G-200 gel filtration step.
(4) Preparation of shoulder-specimens after injection of silicone-caoutchouc are done to examine the vascular system.
(5) Investigating possible application of the DCT-30 thermoelastoplastic shows advantages of some physico-technical properties of this product based on natural caoutchouc and latex by comparison with base-rubber onene.
(6) Silicon-caoutchouc and Vestolit-PVC were the substances used.
(7) Working environments have been tested in plants producing asbestos products, asbestos-cement products, textile asbestos products, asbestos-caoutchouc plates, asbestos boards and asbestos frictional materials for automotive industry, Measurements of total dust concentrations and concentrations of asbestos fibres 5 micron long supported workers' exposure investigations.
Latex
Definition:
(n.) A milky or colored juice in certain plants in cavities (called latex cells or latex tubes). It contains the peculiar principles of the plants, whether aromatic, bitter, or acid, and in many instances yields caoutchouc upon coagulation.
Example Sentences:
(1) A study revealed that the percentage of active sperm in semen 30 seconds after ejaculation was 10.3% when a nonoxynol 9 latex condom was used as opposed to 55.9% in a nonspermicidal condom.
(2) Dynamics in the changes was established among the workers from the production of "Synthetic rubber and latex", associated with the duration of occupational exposure to styrene and divinyl.
(3) These observations indicate that peroxidase staining, as a marker for identification of Kupffer cells in mouse liver, is only of limited value and should be used in conjunction with other methods (e.g., latex phagocytosis).
(4) Changes in protein phosphorylation induced by phagocytic challenge were identified in cultured rat retinal pigment epithelium (RPE) following exposure to isolated rat rod outer segments (ROS) or to polystyrene latex microspheres (PSL).
(5) All these strains produced an enterotoxic principle, antigenically related to cholera coli family of enterotoxins, as detected by latex agglutination and immuno-dot-blot tests.
(6) a) To determine the frequency of perforations in latex surgical gloves before, during, and after surgical and dental procedures; b) to evaluate the topographical distribution of perforations in latex surgical gloves after surgical and dental procedures; and c) to validate methods of testing for latex surgical glove patency.
(7) Conditioned medium was concentrated 10-fold and placed on cultures of rabbit synovial fibroblasts along with an inducer of collagenase (phorbol myristate acetate or latex particles) and [3H]leucine.
(8) latex agglutination, culture and cytotoxic activity.
(9) This was determined by letting the cultured cells phagocytize Latex particles.
(10) The authors report on the sensitivity and interobserver variability of the assay as performed in a blinded fashion in a hospital laboratory by technologists experienced with other latex agglutination assays.
(11) A large decrease in the number of macrophages showing EAC receptors was found after treatment of the cells with BCG, but not "inert" particles such as latex and zymosan.
(12) Three different methods for the determination of circulating immune complexes were compared : precipitation of radioiodinated C1q in polyethyleneglycol-EDTA, inhibition of IgG-coated latex particles agglutination by C1q or polyclonal rheumatoid factor.
(13) The new slide latex particle agglutination test gave better results, with 100% specificity, 80% sensitivity, high predictive values (greater than or equal to 91%), and an overall diagnostic efficiency of 93%.
(14) To investigate the effect of steroid hormone on phagocytosis by keratocytes, we investigated the phagocytic activities for latex beads by rabbit corneal keratocytes cultured in the presence and absence of dexamethasone.
(15) The tests demonstrated that mineral oil damaged the latex condoms within 60 seconds.
(16) It was hypothesized that the noted inhibition was a result of contamination with latex gloves.
(17) The electron-dense tracers, ferritin, peroxidase, Thorotrast, and latex beads were all ingested but none was phagocytized.
(18) The principle can be applied for the preparation of affinity sorbents, e.g., for high-performance affinity chromatography and for the immobilization of enzymes using latex PS particles.
(19) We found that thin gloves manufactured from polyethylene or polyvinyl chloride are ineffective barriers while gloves of thin latex are superior but not without failure.
(20) Human basophil degranulation tests with all four allergens were positive and radio allergo sorbent tests to latex were also positive.