(n.) An orange-red crystalline substance, C15H10O5, obtained from the buckthorn, rhubarb, etc., and regarded as a derivative of anthraquinone; -- so called from a species of rhubarb (Rheum emodei).
Example Sentences:
(1) From lettuce and string beans quercetin was isolated (after chemical hydrolysis) and in rhubarb emodin, an anthraquinon, was detected.
(2) Isolation of emodin in small amounts supports previous evidence that it is an intermediate in secalonic acid biosynthesis.
(3) The mechanism of action of aloe-emodin-9-anthrone, a decomposition product of barbaloin, in causing a significant increase in the water content of the rat large intestine, was investigated.
(4) The bacterium grew in PYF broth containing barbaloin and converted barbaloin to aloe-emodin anthrone.
(5) The anthraquinones danthron, doxorubicin and emodin were poorly metabolized in this system.
(6) Ca(2+)-calmodulin-dependent myosin light chain kinase (MLCK) is inhibited by a range of di-, tri- and tetrahydroxylated anthraquinones (IC50 values 2 to 53 microM), the most potent inhibitors being the more polar compounds, namely mitoxantrone (IC50 2 microM) and emodin (1,3,8-trihydroxy-6-methylanthraquinone) (IC50 8 microM).
(7) At 2.3 h after oral administration of sennoside C, nearly equimolar amounts of aloe-emodin anthrone and rhein anthrone were detected in the large intestine of mice.
(8) These two effects on energy transduction in cytoplasmic membranes explain the antibiotic properties of emodin and emodinanthrone.
(9) In the presence of emodin (10(-6) to 3 x 10(-5) M), the proliferative response was reduced in a dose-dependent manner.
(10) Chrysophanol, islandicin, iridoskyrin, and emodin were inactive as mutagens or as antibacterial agents.
(11) The potential role of highly oxygenated metabolites in mycotoxicosis was emphasized by the establishment of secalonic acids A and D. emodin, moniliformin, altenuisiol alternariol and austdiol as toxins.
(12) Several biologically active substances, such as aloenin (1), magnesium lactate, aloe-emodin (4), barbaloin (5), and succinic acid, were found to be contained in the leaf juice of Aloe arborescens Mill.
(13) Chrysophanic acid, aloe-emodin, and sennosides A and B did not possess activity against any of the viruses tested.
(14) The results showed that aloe emodin inactivated all of the viruses tested except adenovirus and rhinovirus.
(15) The crude extracts and emodin induced a dose-dependent decrease in the mutagenicity of benzo[a]pyrene (B[a]P), 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) and 3-amino-1-methyl-5H-pyrido[4,3-b]indole (Trp-P-2).
(16) Emodin dose dependently relaxed isolated vascular rings of human internal mammary artery and saphenous vein, rabbit thoracic aorta, abdominal aorta and mesenteric artery, and rat thoracic aorta.
(17) Emodin and scoparone, the active principles isolated from Polygonum multiflorum and Artemisia scoparia, respectively, both exhibit vasorelaxant and immunosuppressive effects.
(18) It is concluded that the mutagenicity of emodin is due to a chemically stable, oxidized metabolite forming physico-chemical associations with DNA, possibly of the intercalative type.
(19) Also, nojirimycin bisulfite completely inhibited the transformation of barbaloin to aloe-emodin anthrone.
(20) Among several hydroxylated metabolites of emodin, a fungal anthraquinone and constituent of rhubarb, 2-hydroxyemodin was a direct-acting mutagen showing a large electron-spin resonance (ESR) signal in the presence of DNA, especially at alkaline pH.
Resin
Definition:
(n.) Any one of a class of yellowish brown solid inflammable substances, of vegetable origin, which are nonconductors of electricity, have a vitreous fracture, and are soluble in ether, alcohol, and essential oils, but not in water; specif., pine resin (see Rosin).
Example Sentences:
(1) Results suggest that these resins should be used with some method to compensate for the shrinkage, when used as index material.
(2) The teeth were embedded in phenolic rings with acrylic resin.
(3) Cholestyramine resin was beneficial in reducing stool bulk but had no substantial effect on fat absorption.
(4) In this study, a technique is described by which large obturators can be retained with an acrylic resin head plate.
(5) We retrospectively studied the incidence and course of epoxy resin contact dermatitis in 2265 patients in whom contact dermatitis was confirmed by patch testing.
(6) Bio-Rex 70, a carboxylic acid cation exchanger, is studied as a biological ion-exchanger resin model for cellular cytoplasm.
(7) A reference glass, five ceramic materials, and one resin-based composite were tested.
(8) The bond strength of the resins did not change with the time spent immersed in water up to 6 months, but decreased with any further increase in time.
(9) Urine from patients receiving desipramine was collected and passed through a column of XAD-2 resin.
(10) Primary sternal closure was difficult and delayed closure was performed using splint with a resin plate.
(11) The tractional resistance carried out on the laminate fronts where a treatment of only silane and resin of connection was applied, was greater where the treatment of silane was employed.
(12) A free T4 index (FTI) can be calculated from the values for T4 and TBG index, because the TBG index is reciprocally related to the serum uptake test (T3-resin).
(13) Eight macerated human child skulls with a dental age of approximately 9.5 years (mixed dentition) were consecutively subjected to an experimental standardized high-pull headgear traction system attached to the maxilla at the first permanent molar area via an immovable acrylic resin splint covering all teeth.
(14) The decreases were substantially greater than those achieved with either resin or resin plus niacin.
(15) [Tyr22] glucagon and [desHis1, Tyr22] glucagon were synthesized by an improved solid phase procedure on a Pam-resin.
(16) By embedding the biopsy in the acrylic resin LR White, unsupported sections of which are stable in the electron beam, light and electron microscopy and immunocytochemistry become feasible on sections from the same block.
(17) A technique is described which the glass coverslip of a culture, flat embedded in epoxy resins can be removed easily using hydrofluoric acid.
(18) In conclusion, no porosities are found on the surface of the various resins.
(19) It is also susceptible to thermal inactivation at 37 degrees , possibly through changes in the affinity of triiodothyronine to the nuclear binding protein(s), since the bound triiodothyronine becomes more readily dialyzable, is absorbed by an anion exchange resin, but retains its characteristic mobility on electrophoresis.
(20) A clinical study was carried out to determine the influence of finishing on the wear rate of a posterior composite resin.