(n.) The name of a hypothetical element predicted and afterwards discovered and named germanium; -- so called because it was a missing analogue of the silicon group. See Germanium, and cf. Ekabor.
Example Sentences:
Germanium
Definition:
(n.) A rare element, recently discovered (1885), in a silver ore (argyrodite) at Freiberg. It is a brittle, silver-white metal, chemically intermediate between the metals and nonmetals, resembles tin, and is in general identical with the predicted ekasilicon. Symbol Ge. Atomic weight 72.3.
Example Sentences:
(1) Except for one control group, the other three groups were subdivided into six groups and administered three different kinds of germanium (inorganic germanium, organic germanium, and natural organic germanium) one month before and during dimethylhydrazine treatment, and during dimethylhydrazine treatment, respectively.
(2) Although the actual mechanism involved is not clear, the evidence of the inhibition of senile amyloidosis by organic germanium may give a light to elucidate the pathogenesis of amyloidosis.
(3) This review examines the toxicity and accumulation of germanium and silver in selected microbial species.
(4) However, if an electric field is applied across the membrane, germanium reflection elements would be preferred because of their low electric resistance (approximately 50 omega cm).
(5) In high concentrations, germanium was toxic to the limpets and killed them.
(6) The incidence of intestinal cancer in the control group (dimethylhydrazine only) was 91 percent; in groups provided with inorganic germanium one month before and during dimethylhydrazine treatment, and during dimethylhydrazine treatment only, it was 91 and 78 percent; in groups provided with organic germanium one month before and during dimethylhydrazine treatment, and during dimethylhydrazine treatment only, it was 64 and 64 percent; in groups provided with natural organic germanium one month before and during dimethylhydrazine treatment and during dimethylhydrazine treatment only, it was 50 and 45 percent.
(7) It has turned out that good adhesion of uncharged and negatively charged model membranes to germanium plates is achieved when they are coated with a monomolecular layer of aminopropylsilane.
(8) After a brief recall of toxicological data about germanium compounds, the authors relate subacute and subchronic oral toxicities of beta bis carboxyethyl-germanium sesquioxide in rats.
(9) A germanium-gallium generator producing EDTA-free Ga-68 would permit the synthesis of a broad range of Ga-68 radiopharmaceuticals and thus facilitate the widespread application of positron tomography.
(10) Selenium(Se) has been determined in skin by neutron activation analysis applying selective irradiation and cooling time, followed by measurement of the activity on a high resolution germanium lithium (Ge(Li)) detector.
(11) Non-platinum-group metal antitumor agents are represented by inorganic and organometallic compounds which contain either main-group metals such as gallium, germanium, and tin, or transition metals such as titanium, vanadium, iron, copper, and gold.
(12) Germanium can substitute for boron in carrot cell cultures.
(13) In tumor imaging studies, breast tumor masses as small as 4 mm in diameter were clearly localized on a whole body scan using 131I-labeled BLMRL-HMFG-Mc5 antibodies with a High-Purity germanium gamma camera.
(14) A high-purity germanium spectroscopy system and a beam of 120 kV constant potential x-rays were used to determine the linear attenuation coefficient from 18 to 110 keV.
(15) A data-acquisition system designed for x-ray medical imaging utilizes a segmented high-purity germanium (HPGe) detector array with 2-mm wide and 6-mm thick elements.
(16) The spectra of diagnostic x-ray beams were measured with a germanium semiconductor dectector.
(17) Electronically collimated counts were acquired from the objects rotated to 20 or 40 angular positions in front of the germanium detector to simulate a cylindrical scanning system.
(18) Germanium oxide alone did not affect the frequency of sperm-head abnormalities.
(19) The results demonstrate that, within this class of compounds, (1) potent biological activity does not require the presence of germanium in the structure; (2) in vitro cytotoxic activity does not appear to be a direct result of the inhibition of macromolecular synthesis, and (3) macrophage function can be modulated in vitro at non-cytotoxic concentrations.
(20) The presence of aluminium, beryllium, lead, potassium in the examined air don't stand on the way of determining the concentration of germanium.