No Abstract Available.
Latex Hypersensitivity* ; Latex* ; Operating Rooms*

The purpose of this study was to investigate and compare the biomechanical properties of orthodontic rubber elastic materials. Latex bands, nylon-covered elastic threads and polyurethane-based elastic modules, delivering 205 +/- 10 grams force at 30mm stretching state were selected and stored separately in 3 environments-air (22+/-3degreesC), distilled water (37+/-1degreesC), or natural saliva (37+/-1degreesC). And, the amount of remaining force and permanent elongation of each sample were measured on Instron at interval of 1 hour, 6 hours, 12 hours, 24 hours, 1 week, and 2 weeks. So the data derived were analyzed statistically. The results were as follows: 1. Force decay and permanent elongation of all materials increased with time lapsed; elastic module, latex band and nylon-covered elastic thread in that order of the amount of force decay; elastic module, elastic thread, latex band in that order of the amount of permanent elongation. 2. Among environmental conditions, force decay and permanent elongation in natural saliva, most increased, and those in air, least increased. 3. There was a negative correlation between force decay and permanent elongation. 4. Force decay and permanent elongation were most affected by the material itself, time and environments in that order. 5. After 24 hours in saliva, the percentage of remaining force in elastic module was 51.9% (107.37grams); in latex band, 83.2%(172.62grams); in elastic thread, 85.0%(179.25grams). After 2 weeks in saliva, the percentage of remaining force in elastic module was 42.9%(88.75grams); in latex band, 74.5%(154.50grams); in elastic thread, 77.6%(163.75grams).
Latex ; Rubber* ; Saliva ; Water

Stomach ; Rubber ; Latex

Most of swallowed foreign bodies pass spontaneously. However, sharp objects are usually lodged in the proximal esophagus and cause aspiration, bleeding, obstruction, and perforation. Therefore, prompt retrieval of lodged foreign bodies are necessary. The safe extraction of sharp foreign bodies using endoscopic technique is difficult because sharp objects carry a significant risk of mucosal injury and perforation. Endoscopic techniques for retrieval of foreign body include methods using protector hood and overtube. The former is not available, the later is uncomfortable and its diameter is the limiting factor. Method using a latex glove is available, comfortable, and its diameter is not limited. The thickness of the glove is thinner than protector hood, but we think that a latex glove would seem to be a effective alternative. We report a case in which a sharp foreign body was endoscopically removed using a latex glove without complication.
Esophagus ; Foreign Bodies* ; Hemorrhage ; Latex*

Foreign body ingestion is a common clinical problem. Foreign bodies are generally swallowed accidentally and most pass out spontaneously. However, if a sharp object is not eliminated early, it can penetrate the bowel wall and cause severe complications. Endoscopic techniques for removing sharp foreign bodies safely include methods using a protector hood and overtube. An overtube is uncomfortable and has limitations in its diameter. We introduced a method using a latex glove, which is easily available, comfortable, and has no limitations in diameter. In addition, two endoscopes were used to reduce the risk of complications, and the large sharp object was easily wrapped with the latex glove. We report a case of a sharp and large foreign body being removed endoscopically using a latex glove and two endoscopes without any complications.
Eating ; Endoscopes* ; Foreign Bodies* ; Latex*

According to the situation of 34 batches of natural rubber latex condoms tested by our center in 2018, the unqualified items in the product inspection items and the exploratory research results of D4 and D5 content in silicone oil lubricants are analyzed. We make recommendations on product technical requirements or standards to strengthen the quality supervision of products.
Condoms/standards* ; Latex ; Silicone Oils

Background: Only strains of V cholerae 01 that produce cholera toxin have been associated with epidemics and pandemics in the past; therefore, production of cholera toxin has become an important marker for identifying isolates with the potential to cause epidemics. The Reversed Passive Latex Agglutination test (RPLA) is a semi-quantitative determination of CT or LT in culture fluid. \r\n', u'Objective: To determine the cholera toxin by RPLA in order to evaluate the severity of the epidemic and find an interventional solution.\r\n', u'Subjects and methods: The technique of RPLA enables soluble antigen such as bacterial toxins to be detected in an agglutination assay. A total of 44 strains of V. cholerae 01 were tested for the production of the cholera toxin by RPLA.\r\n', u' Results and conclusion: The concentration of cholera toxin was determined from strains isolated in 2007 much higher than that from the strains isolated in 2004. These results can explain the severe cholera endemic in 2007 in comparison with the endemic in 2004. The RPLA test is a simple and reliable method for determining cholera toxin and suitable for epidemiologic studies on cholera. \r\n', u'
Reversed passive latex agglutination ; cholera toxin

Four new lanostane triterpenoids, 3β-hydroxy-12α-methoxylanosta-7,9(11),24-triene(1), 3β-hydroxy-12α-methoxy-24-methylene-lanost-7,9(11)-dien(2), 3,7-dioxo-lanosta-8,24-diene(3), and 3,7-dioxo-24-methylene-lanost-8-en(4), were isolated from the latex of Euphorbia resinifera with a variety of chromatography methods. Their structures were elucidated based on spectroscopic data and/or comparison with the data reported in previous research. Compounds 1, 2, and 4 showed moderate inhibition of LPS-induced NO production by RAW264.7, with IC_(50) of 30.4, 37.5, and 28.3 μmol·L~(-1), respectively.
Euphorbia ; Latex ; Molecular Structure ; Steroids ; Triterpenes

Lactarius and Lactifluus are milkcaps that are characterized by the secretion of latex. These two genera are part of a globally distributed cosmopolitan group of ectomycorrhizal fungi that is an important food resource in various ecosystems. Recently, the taxonomy of Lactarius and Lactifluus has been revised based on molecular phylogenetics. Despite the importance of these taxa, Korean species of both genera are poorly understood. In an effort to describe milkcap species that are indigenous to Korea, a long-term study has been initiated. During a recent survey, eight species of milkcaps that were previously unrecorded in Korea were detected based on morphological observation and sequence analysis of the internal transcribed spacer region: five Lactarius species (Lactarius atromarginatus, L. austrotorminosus, L. kesiyae, L. tabidus, and L. vietus) and three Lactifluus species (Lactifluus acicularis, Lf. pilosus, and Lf. pinguis). Detailed morphological descriptions and phylogenetic relationships of these species are provided in this article.
Classification ; Ecosystem ; Fungi ; Korea* ; Latex ; Sequence Analysis

No abstract available.
Latex* ; Polystyrenes* ; Potassium Channels* ; Potassium* ; Vasospasm, Intracranial*