| 词汇 | calcium |
| 释义 | calcium noun[ U ] uk /ˈkæl.si.əm/ us /ˈkæl.si.əm/ a chemical element that is present in teeth, bones, and chalk（化学元素）钙 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium transition metal zinc A surplus of calcium brings on senility, as noted above. Besides these four elements, living organisms commonly contain sulphur, phosphorus, chlorine, potassium, sodium, calcium, magnesium and iron. Calcium and chlorine are rarer than on earth, sodium is somewhat commoner. Lime also adds another plant food called calcium. Normal blood albumen is essentially a compound of calcium and sodium into which iron and sulphur both enter. calcium | American Dictionarycalcium noun[ U ] us/ˈkæl·si·əm/ a chemical element present in teeth, bones, and chalk (= type of soft, white rock) Examples of calciumcalcium Redundant mechanisms of calcium-induced calcium release underlying calcium waves during fertilization of sea urchin eggs. In the present work we wanted to verify whether oocytes recovered from preantral follicles were able to acquire calcium activity during follicle culture. It is uncertain, however, how a high concentration of calcium in the absence of lactate inhibits capacitation. Our results suggest that these metabolites are involved in diverse signalling pathways such as calcium release and cell cycle signalling. The calcium injection diminished the nonsaturating receptor potentials by about 70%, and in the ten cells tested, response amplitude was reduced 50 -80%. These include a regenerative sodium current, the potassium inward rectifier, potassium delayed rectifier and transient outward potassium current, and several calcium currents. In the present work we determined whether preantral follicle development in vitro also allows oocytes to acquire calcium signalling activity. Local perinuclear calcium signals associated with mitosis entry in early sea urchin embryos. Concentrations of calcium and manganese were positively correlated with each other and with elevation. However, little is known about which calcium channels are coupled to synaptic exocytosis of glycine, which is primarily released by amacrine cells. To counteract the continued inflow of calcium, horizontal cells are endowed with calcium-regulating mechanisms common to other neuronal types. A scenario emerges from these studies in which calcium ions coordinate the structure of interhemichannel hydrophobic domains. Frequency encoding in excitable systems with application to calcium oscillations. The development of a general theory of frequency encoding in excitable systems by hormonal stimuli allowed the study of intracellular calcium dynamics. Early studies that suggested the adhesive properties of the hyaline layer involved treatment of embryos with calcium-free seawater. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Collocations withcalciumcalciumThese are words often used in combination with calcium. Click on a collocation to see more examples of it. amount of calcium Cement was also applied at 525 kg ha71 at -owering to supply the same amountofcalcium oxide (320 kg ha71). calcium antagonist The two placebo-controlled calciumantagonist trials show benefits which are broadly similar to the thiazide-based trials. calcium channel Examples are anticholinergics, tricyclic antidepressants, theophylline, neuroleptics and calciumchannel blockers. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. See all collocations with calcium |
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