(n.) A white waxy substance, resembling spermaceti, tasteless and odorless, and obtained from coal tar, wood tar, petroleum, etc., by distillation. It is used as an illuminant and lubricant. It is very inert, not being acted upon by most of the strong chemical reagents. It was formerly regarded as a definite compound, but is now known to be a complex mixture of several higher hydrocarbons of the methane or marsh-gas series; hence, by extension, any substance, whether solid, liquid, or gaseous, of the same chemical series; thus coal gas and kerosene consist largely of paraffins.
Example Sentences:
(1) Flow cytometric DNA analysis was performed on both fresh and on paraffin embedded samples obtained by gastroscopic biopsies in 5 patients with histologically normal gastric mucosa (20 specimens) and by radical gastrectomies in 9 cases of human gastric cancer (36 specimens).
(2) Biotin-avidin immunoperoxidase analysis for hCG was performed on all paraffin blocks containing carcinoma-in-situ, grade I, grade II, and grade III transitional cell carcinoma.
(3) Using an antibody to the nerve growth factor receptor (NGFR), we examined dendritic reticulum cells (DRCs) immunohistochemically in 62 formalin-fixed, paraffin-embedded lymph nodes from patients with reactive follicular hyperplasia or with various types of lymphoma.
(4) In contrast, in paraffin as well as in frozen sections of chick oviduct, fixed by immersion or in vapor, PR was exclusively nuclear, including in the absence of progesterone, and the intensity of immunostaining was not modified by progesterone treatment.
(5) Using a silver staining technique (AgNOR technique), we have investigated the nucleolar organizer-associated proteins (NORs) in formalin-fixed paraffin embedded conjunctival specimens of 15 intraepithelial squamous carcinomas, 10 hyperplastic-dysplastic samples and 10 control epithelial fragments; the mean number of intranuclear black dots was determined for each case.
(6) This study shows that the sensitivity and specificity of in situ hybridisation for the detection of EBV genomes in AIDS related lymphomas approaches that of Southern blotting, even when using routinely processed archival, paraffin wax embedded material.
(7) Formalin-fixed, paraffin-embedded tissue was processed by the avidin-biotin complex method.
(8) This is the first report of anti-CD34 staining of acute leukemia in paraffin-embedded sections.
(9) The routine study of bone marrow trephine biopsies involves fixation, decalcification, paraffin-embedment, sectioning and staining.
(10) Paraffin sections (8 microns) containing the medial habenular nucleus were stained with cresyl violet and both left and right medial habenular nuclei were measured by planimetry.
(11) Formalin-fixed, paraffin-embedded tissue samples of canine amelanotic melanomas and normal canine tissues were studied immunohistochemically for the presence of S100 protein.
(12) Histological sections of formalin-fixed, paraffin-embedded tissue comprising 60 surgical specimens of human lung carcinoma were Feulgen stained.
(13) Urothelial cells were pepsin-extracted from paraffin-embedded specimens taken from human nontumorous bladder mucosa, dysplasia, and carcinoma in situ.
(14) Pieces of spleen of both groups were fixed in formalin and embedded in paraffin.
(15) Both methods, which are applicable to paraffin sections, were developed and validated in breast carcinomas with known ER content.
(16) We conclude that there appears to be no benefit from exceeding a concentration of 5% crude coal tar in yellow soft paraffin in the treatment of patients with psoriasis and that the plateau in the dose-response curve for the action of crude coal tar in psoriasis begins at a point between 1 and 5%.
(17) Mycobacterium avium-intracellulare (MAI) can utilize paraffin wax as the sole carbon source in basal media.
(18) Following biotinylation, it was used to detect mannose-specific binding sites in fixed cells of seven human leukemia or lymphoma lines and in fixed, paraffin-embedded sections of human breast cancer.
(19) The parotid saliva of the caries-rampant group showed a significantly higher level of anodemigrating proteins, predominantly isoamylases, and a significantly lower level of cathode-migrating proteins than that of the caries-resistant group in both paraffin-stimulated and sour lemon-stimulated salivary flows.
(20) Ten tissue sections from 10 examples of Bowen's disease were excised from paraffin blocks, rehydrated, and incubated in 90% formic acid at 45 degrees C for 18 h. The epidermis was gently removed with the aid of a dissecting microscope, and the remaining dermis with attached basal lamina was processed for scanning electron microscopy.
Stearin
Definition:
(n.) One of the constituents of animal fats and also of some vegetable fats, as the butter of cacao. It is especially characterized by its solidity, so that when present in considerable quantity it materially increases the hardness, or raises the melting point, of the fat, as in mutton tallow. Chemically, it is a compound of glyceryl with three molecules of stearic acid, and hence is technically called tristearin, or glyceryl tristearate.
Example Sentences:
(1) The dietary fats were corn oil, soybean oil, palm oil, palm olein and palm stearin.
(2) The overheating of animals was accompanied by a decrease in unsaturation of lipids in liver tissue, brain and skeletal muscles due to a decrease in amounts of arachidonic acid and to an increase in content of palmitinic and stearinic acids.
(3) Palmitine and stearine, as well as oleic and linoleic acid concentrations were significantly lower 12 hours postoperatively in group I than groups II and III (P < 0.05).
(4) The embryo fat contained relatively lower contents of palmitin-, stearin- and linolenic acid, on the other hand higher contents of oleic- and linoleic acid in comparism to endosperm fat.
(5) Ferning is obstructed by ointment, fat emulsion dropped on the conjunctiva and mucous thread, but not by a glass slide rubber with stearin.
(6) There was a statistically significant decrease of palmitinc, stearinic, oleinic, linolic and arachidonic acid and of total FFA in the patients with acute alcoholic hepatitis (AAH) as compared with the controls (p less than 0.001).
(7) Strain H1107 could utilise crude palm oil, its liquid (palm olein) and solid (palm stearin) fractions and its component fatty acids (oleic, palmitic, stearic and myristic) as the main carbon source; strain M223 could not.
(8) The chromatographic system used successfully separated the critical pairs OOO-LOS, PaPaO-LnPP and PaOO-LOP (O = olein; L = linolein; S = stearin; Pa = palmitolein; Ln = linolenin; P = palmitin).
(9) Data on the development of ultraviolet (UV) deficiency in the cosmonauts are analyzed, possible ways to optimize UV radiation and alimentary stearin supply in order to prevent vitamin D deficiency and to correct the changes in phosphorous-calcium metabolism are discussed.
(10) Ricinoleic acid, oleic acid, dioctyl sodium sulphosuccinate, deoxycholic acid and sennoside A + B stimulated release of PGE-like material into the colonic lumen whereas the osmotic laxative mannitol and stearinic acid did not.
(11) Plasma cholesterol levels of rats fed soybean oil were significantly lower than those of rats fed corn oil, palm oil, palm olein or palm stearin.
(12) The amount of PGE release in experiments with ricinoleic acid, oleic acid, stearinic acid and dioctyl sodium sulphosuccinate (with and without indomethacin) showed a good correlation (r = 0.99) with the change in net water flux.
(13) In the patients with chronic hepatitis, as compared with the controls higher contents of cholesterin, total lipids, phospholipids, triglyceride, beta-LP, NEFA, LPL, endogene heparin, stearinic, palmitic, palmitoleic and oleic acids and blood sugar were found.
(14) In the early state of intoxication serum concentrations of palmitoleinic and oleic acid were more increased than those of stearinic acid.