(1) Inspired and expired air was sucked at a constant rate into samplers filled with acid-treated diatomite (Uniport-S) to absorb nicotine in the air.
(2) The latter includes naturally occurring polyhydroxy materials such as agarose, cellulose, or cellulose derivatives, and other particulate materials such as inorganic diatomites and a synthetic organic copolymer.
(3) Analysis of diatomite dust carried out with X-ray diffraction method showed the presence of quartz in a quantity not exceeding 5%, while in silica earth dust from the USA no silica critalline structures were found.
(4) The mixed-bed columns contained ion-exchange cellulose and diatomite, and those with a 5:1 volume ratio of ion-exchange cellulose (average particle size 7 micronm) and diatomite were found to be superior in almost every respect.
(5) p-Chloroacetanilide was eluted from a pH 8 phosphate-buffered diatomite partition column by using purified tetrachloroethylene (acetaminophen was retained).
(6) The serum sample (5 microliters) was pretreated by Extrelut column (diatomite column) extraction with chloroform-methanol (95:5).
(7) In class 3) some diatomitic clays have shown emanation rates as large as 100 atoms .
(8) Diatomite carriers, such as Celite, have desirable physical properties, are inexpensive, and are suitable for both mycelial and bacterial systems.
(9) This work investigated the use of diatomite carriers as a biocatalyst support in a packed-bed reactor where L-tyrosine was enzymatically decarboxylated using adsorbed, non-growing cells of Streptococcus faecalis.
(10) Fibrogenic effect of two natural amorphous silica dusts-diatomite from deposits near Leszczawka (Poland) and silica earth (from the USA) was tested on the rats.
Kieselguhr
Definition:
(n.) Siliceous earth; specifically, porous infusorial earth, used as an absorbent of nitroglycerin in the manufacture of dynamite.
Example Sentences:
(1) Alumina, Kieselguhr and various grades of silica gel have been tested as supports.
(2) Mouse L-cell mitochondrial rRNA was eluted after cytoplasmic rRNA on a column of methylated albumin-kieselguhr.
(3) The method consists of trapping chlordiazepoxide in sulfuric acid in kieselguhr, eluting the impurity with ether, and quantitating by UV spectrophotometry in absolute alcohol at 312 nm.
(4) This labeled material was shown to be separable from nucleic acids, could be eluted from a methylated albumin-kieselguhr column at 0.5 m NaCl, was of high molecular weight, and had several characteristics in common with polyphosphate.
(5) This is demonstrated by fractionation, on methylated albumin-kieselguhr columns, of a mixture of nucleic acids from vegetative and induced buds, one being labeled with uridine-H(3) and the other with uridine-2-C(14).
(6) With methylated albumin-kieselguhr fractionated 3H-HeLa DNA as a source of native or single-strand DNA antigen in a modified Farr assay, an increased level of antibody to native DNA was associated with active systemic lupus erythematosus, particularly active nephritis.
(7) Tyrosyl-, histidyl-, lysyl-, and phenylalanyl-tRNA's from 3 tumors (DBAH, DBAH, and DBA), differing in growth rates and from host mammary glands and liver, were compared by means of methylated albumin kieselguhr (MAK) column and by reverse-phase-5 chromatography.
(8) Stomach and intestine contents and blood samples from guinea-pigs were cleaned up by use of a kieselguhr column followed by heptane-water partition.
(9) The resolution of triglyceride mixtures on a Kieselguhr G layer silanized with dimethyldichlorosilane and the mobile phase acetone-acetonitrile-water under different chromatographic conditions has been investigated.
(10) From the purified neurotoxin isolated by kieselguhr and cellulose chromatography we calibrated analytic columns for b4-2 analysis.
(11) Demand for kieselguhr has increased and new factories are to be established which may result in new cases of silicosis.
(12) In Sweden six cases of silicosis caused by exposure to kieselguhr have been reported to the Worker's Protection Board.
(13) DNA preparations from seven bacterial species and from the E. coli phage T4 can, after denaturation with alkali, be separated chromatographically into two distinct components (L and H) through intermittent gradient elution from methylated albumin kieselguhr columns.
(14) Minor components of RNA (detected by pulse-labelling and chromatography on methylated albumin-kieselguhr) and rapidly labelled components of DNA containing single-stranded regions are also precipitated.
(15) Chromatography on methylated albumin-kieselguhr columns failed to separate 40S RNA from 26S RNA.
(16) The method involves extraction with aqueous methanol followed by a two-stage clean-up procedure utilizing a commercial kieselguhr column and a silica gel cartridge.
(17) The bacteriophage øX-174 replicative form of DNA exists in two configurations, as judged by electron microscopy and sucrose density gradient sedimentation, and on methylated albumin-coated kieselguhr column chromatography.
(18) The only way to prepare high molecular weight rapidly labelled RNA and polysomes was to grind freeze-dried cells together with kieselguhr with a mortar and pestle.
(19) The effect of hormones on (32)P incorporation into various RNA fractions in germinating pear embryos was studied by fractionation on methylated albumin-kieselguhr columns.
(20) Control of ribosomal RNA and transfer RNA syntheses was examined by chromatographing cell extracts on methylated albumin kieselguhr columns.