| sucrose haemolysis test | Isotonic sucrose promotes binding of complement to red blood cells; in paroxysmal nocturnal haemoglobinuria a proportion of the cells is sensitive to complement-mediated lysis, and haemolysis ensues. (05 Mar 2000) |
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| sucrose | Nonreducing disaccharide, _ D glucopyranosyl _ D fructofuranose. (18 Nov 1997) |
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| sucrose alpha-d-glucohydrolase | <enzyme> An enzyme hydrolyzing sucrose and maltose; in a complex with isomaltase; hence, hydrolyzes both sucrose and isomaltose; found in the intestinal mucosa; a deficiency of this enzyme results in defective digestion of sucrose and linear a1,4-glucans. Synonym: sucrase. (05 Mar 2000) |
| sucrose - fructan 6-fructosyltransferase | <enzyme> Catalyses the formation and extension of beta-2,6-linked fructans, typical of grasses; from barley, hordeum vulgare; genbank x83233 Registry number: EC 2.4.1.- Synonym: barley 6-sft (26 Jun 1999) |
| sucrose permease | <chemical> Sucrose-utilizing enzyme Chemical name: permease, sucrose (26 Jun 1999) |
| sucrose-phosphate synthase phosphatase | <enzyme> A type 2a phosphoprotein phosphatase Registry number: EC 3.1.3.- Synonym: sps-phosphatase (26 Jun 1999) |
| sucrose synthase | <enzyme> Sus1 gene product isolated from maise Registry number: EC 2.4.1.13 Synonym: sucrose synthetase, udp-glucose-d-fructose-2-glycosyltransferase, suc synthase 1, suc synthase1, sus1 gene product (26 Jun 1999) |
| dietary sucrose | Sucrose present in the diet. It is added to food and drinks as a sweetener. (12 Dec 1998) |
| a' haemolysis | Haemolysis observed infrequently in blood agar cultures of occasional strains of streptococci; the zone of haemolysis about the colony is not as clear, or wide, or distinctly outlined as it is in b haemolysis; there are a few apparently intact erythrocytes throughout the zone, but they are more numerous in the immediate vicinity of the colony, and there is no discoloration as there is in a haemolysis; the unique feature is that the zone becomes wider, i.e., the process is stimulated, when the culture is incubated at refrigerator temperatures (not true for b haemolysis); some strains of streptococci that are a'-haemolytic on horse blood agar cause typical a haemolysis on rabbit blood agar. (05 Mar 2000) |
| b haemolysis | Complete or "true" haemolysis observed in blood agar cultures of various bacteria, especially haemolytic streptococci and staphylococci; virtually all of the erythrocytes are destroyed in a relatively wide, regularly circumscribed, circular zone about the colony, thereby resulting in a clear "halo" of transparent agar; the zone of haemolysis is frequently much wider than the diameter of the colony; the degree of change varies with species of erythrocytes, e.g., those of sheep and rabbits are usually more easily haemolyzed than those of man, and so on; the haemolysin acts extracellularly (in the absence of the bacterial cells) and may be quantitatively estimated by means of tube-dilution tests of a bacteria-free filtrate (containing the haemolytic substance) with a suspension of erythrocytes. (05 Mar 2000) |
| biologic haemolysis | Haemolysis caused by agents elaborated by various animal and plant forms. (05 Mar 2000) |
| venom haemolysis | That caused by haemolytic material in the venom of various species of snakes or other venomous animals. (05 Mar 2000) |
| g haemolysis | A term sometimes used to indicate that there is no haemolysis in relation to bacterial colonies in or on blood agar; thus, nonhemolytic organisms may be referred to as producing g haemolysis. (05 Mar 2000) |
| viridans haemolysis | See: a' haemolysis. (05 Mar 2000) |
| phenylhydrazine haemolysis | An in vitro test for G6PD deficiency; haemolysis resulting from in vitro addition of phenylhydrazine to blood with red cells which are deficient in glucose-6-phosphate dehydrogenase (G6PD), with the appearance of Heinz-Ehrlich bodies. (05 Mar 2000) |
| conditioned haemolysis | Haemolysis caused by complement when erythrocytes have been sensitised by specific complement-fixing antibody. Synonym: conditioned haemolysis. (05 Mar 2000) |