(n.) A mineral identical in composition with calcite or carbonate of lime, but differing from it in its crystalline form and some of its physical characters.
Example Sentences:
(1) The calcium carbonates-calcite, aragonite, and vaterite-constitute most of the remainder of the calculi.
(2) It is suggested that these substances may be vaterite and aragonite.
(3) Its absence in all analyzed invertebrate tissues (including calcitic, aragonitic, and apatitic mineral phases) indicates that matrix protein-bound gamma-carboxyglutamic acid is not obligatory for the calcification process in the invertebrates.
(4) Skeletal walls of more than one mineralogy have the magnesium-rich layer (calcite) surrounding the living chamber and the strontium-rich layer (aragonite) on the outside.
(5) The biocompatibility of mammal bone with aragonite and calcite skeletons of aquatic invertebrates (Corals, Molluscs) led us, after animal experimentation, to implant in humans artificial dental roots derived from such invertebrates.
(6) Toothpastes contain substances which promote dental health, such as abrasives (silicium dioxide, brushite, calcite, calcite and aragonite, gibbsite etc.
(7) But because cold water absorbs CO2 more quickly, the study predicts that levels of aragonite will fall by 60% to 80% by 2095 across the northern hemisphere.
(8) Aragonite seems to be formed slowly in undisturbed conditions.
(9) A gallstone of almost perfect octahedral symmetry was composed of a mixture of crystallites of the three polymorphous forms of calcium carbonate: calcite, aragonite, and vaterite.
(10) Peak milk yield paralleled dry matter intake and was higher when calcite flour and aragonite provided .9% calcium, intermediate when all sources provided .6% calcium, and lower when albacar provided .9% calcium.
(11) Dumbbell-like concretions of aragonite predominate during pregnancy and pseudopregnancy.
(12) The presence of calcite, aragonite and iron-containing pigment materials in the concretion is suggested.
(13) The variation in the amount of calcium carbonate formed with time was studied by weighing the precipitate, and the percentages of calcite, vaterite, and aragonite were determined by x-ray diffraction (XRD) analysis.
(14) But in our gallstone series in man, aragonite was most commonly found, with an occurrence rate of 90.6%, while that of calcite was 62.5%.
(15) In contrast, the distribution of gamma-carboxyglutamic acid in the vertebrates has been further extended by this study to include an apatitic shark tooth and an aragonitic fish otolith.
(16) Moreover three cases contained all three forms of calcium carbonate polymorphs; calcite, aragonite and vaterite.
(17) Such acidification spells problems for coral reefs, which rely on calcium minerals called aragonite to build and maintain their exoskeletons.
(18) The crystalline phases at the first few lamellae were mostly imperfect while the whole nacreous layer acquitted itself into a highly oriented biomineralized aragonite.
(19) The three cholesterols-cholesterol monohydrate, anhydrous cholesterol, and cholesterol II-account for 71% of the total crystalline material in the stones; the calcium carbonates-vaterite, aragonite, and calcite-contribute 15%, and calcium palmitate contributes 6%.
(20) It says that levels of aragonite, the type of calcium carbonate which is essential for marine organisms to make their skeletons and shells, will fall worldwide.
Dimorphous
Definition:
(a.) Characterized by dimorphism; occurring under two distinct forms, not dependent on sex; dimorphic.
(a.) Crystallizing under two forms fundamentally different, while having the same chemical composition.
Example Sentences:
(1) The sexual dimorphism in hepatic drug metabolism found in Crl:CD-1 mice is due to the normally repressive effects of testicular androgens on the activities of hepatic monooxygenases.
(2) Conclusions on phylogenetic trends of sexual dimorphism of skeletal robusticity and the effect of culture on it seem to be premature.
(3) The MA and BNST in general are involved in regulation of several sexually dimorphic functions, including aggression, sexual behavior, gonadotropin secretion and integration of olfactory information.
(4) In this study the development of the sexually dimorphic DLN was examined to test the hypothesis that early androgen action also determines the sex difference in DLN motoneuron number by regulating normally occurring motoneuron death.
(5) Taken together, the findings show that a prevalent nondeleterious dimorphism exists in the activation peptide of human coagulation factor IX.
(6) The recent demonstration that the expression of the neuropeptide cholecystokinin is activationally regulated by estrogen at the mRNA level, within a sexually dimorphic population of neurons in the medial amygdala, suggests a possible cellular mechanism for the hormonal modulation of olfactory information relayed along the vomeronasal pathway to the hypothalamus.
(7) These findings are discussed with respect to similarities and differences between marsupial and eutherian females and between male and female gray opossums in the hormonal control of sexually dimorphic behavior and morphology.
(8) Analysis proceeded by means of the analysis of covariance with the dental dimorphism indices as the dependent variables.
(9) The purpose of the present study was to identify the existence of sexual dimorphism in the dendritic field of accessory olfactory bulb mitral cells in rats and to investigate the effects of male orchidectomy and female androgenization on the day of birth upon this dendritic field.
(10) Contacts of untreated lepromatous and dimorphous (borderline) leprosy patients are at relatively high risk of disease and should be examined annually for at least 5 years.
(11) This sexual dimorphism in dopamine uptake was present in cultures of tissue removed before the perinatal rise of testosterone occurs in males, and was present even in the absence of hormonal additives to the culture medium.
(12) The sexual dimorphism emerges when a fish reaches about 110 mm total length.
(13) We conclude that intermale competition among platyrrhine species is the most important factor explaining variations in canine dimorphism.
(14) Renal gamma-GTP activity gradually increased in males with maturation, and a sexual dimorphism of renal gamma-GTP was apparent after the fourth week.
(15) These results suggest that prenatal exposure to AVP or caffeine produced sexually dimorphic effects on learning and that the effects are specific to the structure of AVP.
(16) Sexual dimorphism is well marked in both populations and among the Ainu appears to be due largely to clothing habits.
(17) At onset of puberty, the level rises again and exhibits a sexual dimorphism.
(18) The fungicidal activity of terbinafine which has been demonstrated in vitro for several strains of dermatophyte, filamentous and dimorphic fungi, has been demonstrated in vivo in model systems for dermatophytoses.
(19) Two multivariate statistical tests are presented for examining differences in sexual dimorphism between human populations.
(20) The hypothesis that patterns of sexual dimorphism in transverse dimensions of the metacarpal only reflect sex differences in body size was investigated in a sample of 324 Mexican school children 6.00-10.99 years of age.