What's the difference between haematin and hematein?
Haematin
Definition:
(n.) Same as Hematin.
Example Sentences:
(1) It is postulated that the linkage between the haem groups of dimeric haem and the haematin groups of dimeric haematin is essentially hydrophobic in nature.
(2) Typically, haem therapy has been given in the form of haematin--haem dissolved in alkali.
(3) Metmyoglobin was only partially re-formed by adding haematin to the precipitate produced by apomyoglobin with an antiserum of the first group, whereas complete re-formation of metmyoglobin was achieved in the presence of antisera of the second group.
(4) Haematins (hydroxyferriprotoporphyrin IX) constitute a possible receptor for antimalarial drugs such as chloroquine or quinine.
(5) The use of erythrocyte morphology as a screening test for deficient absorption of haematinics is unsatisfactory; false positive (42.8%) and false negative (41.6%) results are encountered too frequently to recommend its use.
(6) A recently published method for measuring human haemoglobin based on alkaline haematin (Zander et al., Clin.
(7) Actinomycin D, puromycin or cycloheximide prevent the activation of the enzyme by 5-aminolaevulinate but not that by haematin.
(8) The deficiency of haematinic factors appears to be largely due to poor nutrition.
(9) None of the patients received haematinics during the study period.
(10) Some other phenol compounds (caffeic acid and 4-hydroxy-3-methoxybenzoic acid) also showed inhibitory effects on the haematin- and haemoglobin-catalysed epoxidation, but salicylic acid did not.
(11) The antiporphyrogenic effect of haem arginate (even after storage for two years) in 2-allyl-2-isopropylacetamide-induced experimental porphyria of rats was equal to that of freshly prepared haematin.
(12) The distressing misdiagnosis of the cause of this anaemia is pointed out, and the consequent misuse of haematinics in the form of blood transfusion, iron and vitamin B12 is shown.
(13) The major GSH transferase was inhibited by haematin-related compounds, bile acids and a number of anthelmintics including members of the benzimidazole and phenol-based class of compounds.
(14) In females the digestion of white mice blood to haematin at 23-24 degrees lasted not over 12 hours, the digestion of blood of hamsters and man - 12 to 20 hours, of guinea pigs and reptiles - 18 to 25 hours and of white rats and pigeons - from 20 to 30 hours.
(15) The findings are discussed in relation to replacement of bone marrow by lepromatous tissue as well as possible interference in the metabolism of haematinics by M. leprae.
(16) Supplementation of haematinic therapy with these compounds is recommended.
(17) The combined injection of either haematin or 5-aminolaevulinate with cortisol does not produce an additive effect, whereas potentation is observed when tryptophan is jointly given with either the cofactor or the haem precursor.
(18) Thereafter, endosomes decreased in size as digestion proceeded and there was an increase of haematin granules.
(19) Three interrelated parenchymal perikaryal pigments were identified in the putaminal lesions of all 3 patients: a "haematin" pigment, neuromelanin and lipofuscin.
(20) During pregnancy, the women received a haematinic supplement of 500 micrograms pteroyl glutamic acid and 47 mg iron a day, and a food supplement was also given to some of the women during either pregnancy, or lactation, or both.
Hematein
Definition:
(n.) A reddish brown or violet crystalline substance, C16H12O6, got from hematoxylin by partial oxidation, and regarded as analogous to the phthaleins.
Example Sentences:
(1) The autoxidation of hematoxylin to hematein was accompanied by an increase in absorbance between 400 and 670 nm.
(2) All additives tested (ethyl alcohol, glycerine, chloral hydrate, ethylene and propylene glycol, and citric, malonic and maleic acids) in varying degrees limited the conversion of hematein to insoluble compounds.
(3) Brazilein is much more acid-sensitive than hematein.
(4) It was shown that of the dye components of Papanicolaou stains only aluminum hematein, orange G, light green SF and eosin Y are bound to cervical cells and that their chromophores do not interact.
(5) Furthermore, keratinization was studied with the rhodamine B method and lipids with the oil red O, the OTAN and the acid hematein methods.
(6) Hematein and Fe+++ form a variety of cationic, anionic and non-ionic chelates; the ratio of these compounds changes with time.
(7) Current chemical concepts were applied to Weigert's, M. Heidenhain's and Verhoeff's iron hemateins, Mayer's acid hemalum stain and the corresponding brazilein compounds.
(8) Verhoeff (1908) recommended an iron-hematein formula containing Lugol's solution for demonstration of elastic tissue; sections are differentiated until desired staining patterns are obtained.
(9) Since pyridine-extractable acid-fastness (and acid hematein-positivity) serve to distinguish human leprosy bacilli from M. lepraemurium, one or the other, or both, are suggested as bases for differentiating these two organisms in animal experiments designed to show the in vivo propagation of human leprosy bacilli.
(10) After pyridine extraction, bromination, or aqueous saponification, true mycobacteria lost neither their acid hematein-positivity nor their acid-fastness.
(11) The traditional quinonoid formula of hematein and brazilein was revised.
(12) When combined in specified proportions the stock solutions yield aluminum-hematein dissolved in nontoxic propylene glycol.
(13) While permanent loss of acid-fastness from leprosy bacilli always resulted in a loss of acid hematein-fixing material (Smith-Dietrich-Baker tests), the reverse was not true.
(14) Olation of such chelates affects the staining properties of iron hematein solutions.
(15) The acid hematein-positive material and the acid-fastness of both leprosy bacilli and mycobacteria were lost after treatment with alkaline ethanol.
(16) On day 4 the animals were sacrificed, the mean tumour diameter measured, the tumour bearing kidney fixed in Bouin's picroformol solution and processed for histological analysis after staining with hematein.
(17) The absorption spectra of hematein-aluminium solutions have been recorded at various concentrations and pH values; the solutions were prepared using analytically pure hematein and potassium alum as aluminium source.
(18) In aqueous solution, four different hematein-aluminium complexes could be distinguished by absorption spectroscopy.
(19) Hematoxylin, a natural dye commonly used as a histological stain, generates superoxide upon oxidation to its quinonoid product, hematein.
(20) The topographical and quantitative study was done on frozen 20-mu sections of tissue stained with Sudan IV in propylene glycol and counterstained with hematein (Geigy).