(a.) Of or pertaining to pectin; specifically, designating an acid obtained from ordinary vegetable jelly (pectin) as an amorphous substance, tough and horny when dry, but gelatinous when moist.
Example Sentences:
(1) Pectic substances separation on DEAE-cellulose column.
(2) The mercury-activated enzyme progressively removed the terminal galacturonic acid residues from alpha-(1-->4)-linked galacturonide chains and converted digalacturonic acid, trigalacturonic acid, tetragalacturonic acid and pectic acid into galacturonic acid.
(3) The procedure is shown with pectic substances as an example.
(4) The splitting layer differs from the pectic middle lamella particularly in its insolubility in an incubating medium which removes the wall subunits (EDTA, DMSO, pectinases, cellulases) and its non-reactivity to polysaccharide test involving periodic oxidation (PATAg staining).
(5) This complexity can best be appreciated by considering xyloglucan, a hemicellulose present in the cell wall of both monocots and dicots, and rhamnogalacturonan II (RG-II) and rhamnogalacturonan I (RG-I), two structurally unrelated pectic polysaccharides.
(6) In the primary walls of the various types of cells under study and in the inner part (close to the cytoplasm) of the wall of the epidermal cells, the linkage of the pectic substances would be mainly by covalent bonds.
(7) that cause soft-rot diseases in plants produce a variety of extracellular pectic enzymes.
(8) Past workers have suggested pectic enzyme involvement in the invasion of legumes by Rhizobium.
(9) The main fraction (67%) represents a pectic polysaccharide mainly composed of galacturonic acid besides rhamnose, arabinose and galactose.
(10) Analysis of the resulting mutants, CUCPB5008 (Pel+ Peh-) and CUCPB5009 (Pel- Peh-), indicated that exoPG can contribute significantly to bacterial utilization of polygalacturonate and the induction of pectate lyase in the presence of extracellular pectic polymers.
(11) Serum amyloid P component (SAP), a normal human plasma glycoprotein, was found in a solid phase ELISA to have Ca2+-dependent binding for keyhole limpet haemocyanin (KLH), pectic acid, trinitrophenylated (TNP) macromolecules, and plastic surfaces.
(12) One of the anti-complementary pectic polysaccharides (AR-2IIa) isolated from the root of Angelica acutiloba Kitagawa gives the "ramified" region (PG-1a,rhamnogalacturonan with neutral side-chains) in addition to oligogalacturonides on digestion with endo-alpha-D-(1--4)-polygalacturonase.
(13) High concentrations of phosphate are shown to be necessary for pectic enzyme formation on solid media.
(14) The possible relationship between pectic polysaccharide-xylan-phenolic complexes and the onset of lignification in maturing tissues is discussed.
(15) Contrary to current views, the actual pectic middle lamella does not seem to be directly engaged in the initiation of the aerating system, which conversely appears subordinate to the presence of specialized substructures within the wall.
(16) All pectolytic cultures produced pectin esterase and polygalacturonase but no pectic acid trans-eliminase when grown in nutrient glucose broth.
(17) In this paper, we report the effect of pectic substances and D-galacturonic acid, the main constituent of pectic substances, on activated hyaluronidase and histamine release from mast cells.
(18) In addition to soluble antigens, cellulose subunits and pectic substances, two major plant cell wall components, were found to be highly preserved in microwave-irradiated tobacco plant tissue.
(19) Hydrolysis of substrate occurred in a random fashion and the enzyme was 50% more active towards acid soluble pectic acid (ASPA) than towards sodium polypectate.
(20) The increased synthetic activity was due to the release and increased activity of a glucose oxidase enzyme apparently attached to plant cell-wall material and liberated by the action of pectic enzymes of the bacterium.
Pectin
Definition:
(n.) One of a series of carbohydrates, commonly called vegetable jelly, found very widely distributed in the vegetable kingdom, especially in ripe fleshy fruits, as apples, cranberries, etc. It is extracted as variously colored, translucent substances, which are soluble in hot water but become viscous on cooling.
Example Sentences:
(1) Thirty-two strains of pectin-fermenting rumen bacteria were isolated from bovine rumen contents in a rumen fluid medium which contained pectin as the only added energy source.
(2) The different hydrolytic, fermentative and methanogenic activities of these populations ensure the efficient degradation of cell wall constituent in forages (cellulose, hemicellulose, pectin) ingested by ruminants.
(3) These cocultures can be considered as metabolic associations, where the Bacillus produces degradation and fermentation products of pectin, which can be used by Azospirillum species.
(4) On the other hand, wheat bran, pectin, guar gum, and degraded carageenan all stimulate large bowel cell proliferation, the greatest growth response tending to occur in the cecum or proximal colon.
(5) An in vitro experiment was conduced under bacteriologically controlled conditions to examine the effect of light on the production of pectin methyl esterase (PME) and pectin polygalacturonase (PG) in the root exudates of Trifolium alexandrinum inoculated with an efficient strain of Rhizobium trifolii.
(6) Following eight years of employment during which he added pectin to a recipe for Christmas candies, the candymaker developed acute respiratory symptoms.
(7) Amiloride and verapamil inhibit pectin-induced differentiation and also reduce the onset of the Na+ and Ca2+ flux.
(8) This study compared the dietary fiber (DF), neutral detergent fiber (NDF), cellulose, hemicellulose, lignin, and pectin content of selected fruits and vegetables.
(9) We suggest that the pollen expression of LAT56 and LAT59 might relate to a requirement for pectin degradation during pollen tube growth.
(10) The pectin supplement reduced protein concentration in jejunal contents while cellulose reduced protein concentration in the ileal and caecal contents.
(11) A pectin pectylhydrolase (pectinesterase) (EC 3.1.1.11) was also present in the clarified cultures.
(12) A similar meal in which guar was added to the bread and pectin to the marmalade resulted in significant reductions of blood glucose at 15 min (P less than 0.002) and 30 min (P less than 0.01).
(13) These tumors always develop at the pectinate line and transitional mucosa, while rectal localizations corresponds to contiguous extension from a melanoma of the anal canal.
(14) The nerves distribute to structures at either side of the loop: superolaterally to pectinate muscle and inferomedially to the region of the AV node.
(15) Pectin was consumed with fruit and sugar as a gel in divided doses with meals.
(16) Fecal bacterial flora was modified by pectin; anaerobic bacteria increased and aerobic bacteria increased.
(17) We compared the effectiveness of 1 mM Geritol, 12% corn oil emulsion, Kaolin-pectin, single contrast oral barium sulfate, and effervescent granules as enteric magnetic resonance imaging (MRI) contrast agents.
(18) The pectin effect on gastric emptying may be caused solely by increasing the viscosity of the meals.
(19) The kind of inhibition on kiwi pectin methylesterase was found to be competitive with an apparent Ki of 0.22 microM, using citrus pectin as a substrate.
(20) However, 15% pectin diet could neither inhibit colonic carcinogenesis nor increase the fecal weight.