(a.) Pertaining to, or derived from, ants; as, formic acid; in an extended sense, pertaining to, or derived from, formic acid; as, formic ether.
Example Sentences:
(1) Simple hexane and formic acid-hexane extraction methods, involving pretreatment of the serum with formic acid, were compared by radiometric and by paper chromatographic and gas chromatographic analysis.
(2) 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.
(3) The green pigments from the fungi of the genera Trichoderma and Penicillium were partially extracted with formic acid.
(4) Further purification was performed by gel chromatography using a Superose 12 column eluted in 70% formic acid.
(5) The six silage treatments were untreated corn silage (low nitrogen); untreated corn silage and untreated alfalfa silage (1:1); untreated corn silage and formaldehyde and formic acid-treated alfalfa silage (1:1); ammonia-treated corn silage (low nitrogen); treated corn silage and untreated alfalfa silage (1:1); or treated corn silage and treated alfalfa silage (1:1).
(6) Heating, growth of fungi, and days until spoilage were delayed by all acid additions during refermentation, with propionic more effectivethan formic.
(7) The eggs of Dicrocoelium dendriticum were induced to open by solutions of formic acid and caproic acid (Table 1).
(8) They were then decalcified for 14 days in 5% formic acid-sodium citrate, sectioned serially at 7 microns and stained with hematoxylin and eosin, Masson's stain, and silver impregnated stain.
(9) Liver microsomes isolated from rats fed the 3 diets metabolized MAM to formic acid and methanol in vitro, but liver microsomes from rats fed the continuous ethanol diet were 12 to 15 times more active than liver microsomes from rats fed the control diet.
(10) At elevated pH and temperature, chloral hydrate readily decomposed and chloroform and formic acid were detected as products.
(11) This embryotrophic factor was extracted from BSA dissolved in formic acid by membrane filtration (membrane cutoff of M(r) 10,000) and then freeze-drying of the filtrate.
(12) The enhanced sensitivity of some Salmonella typhimurium strains to the mutagenic action of a number of chemicals appears to be due to the defect in the uvrB gene product and not to an inability to produce H-2-S or to the absence of formic acid hydrogenlyase which also characterizes these strains.
(13) Studies using H2(18)O and 18O2 demonstrated that, in the cleavage of (4-hydroxybenzoyl)methanol to 4-hydroxybenzoic and formic acids by an enzyme from an Alicaligenes sp., oxygen is incorporated into both products from dioxygen and not from water.
(14) 60% Formic acid, necessary for solubilization of structural polypeptides of poliovirus and other proteins, modified at the cysteines, was used together with 2-propanol or acetonitrile as organic modifier for gradient elution in reversed-phase high-performance liquid chromatography.
(15) In sharp contrast, both intact M1 protein and the C-terminal 15-kilodalton formic acid fragment were able to inhibit viral transcription markedly.
(16) The concentrate from this step was applied to a gel filtration column of Sephacryl S-200 and eluted with 10% formic acid.
(17) In addition, evidence is presented that formic acid is crossing the brushborder membrane of rabbit renal cortex by non-ionic diffusion.
(18) After EDTA or formic acid decalcification, a range of DNA denaturation schedules was assessed and immunohistological detection of BrdU-containing nuclei was performed using the Sera Lab anti-BrdU antibody MAS 250b.
(19) Lactic acid was the major product; ethyl alcohol, acetic acid, formic acid, and carbon dioxide were formed in smaller amounts.
(20) The sample is transferred to a volumetric flask, a small volume of formic acid is added to dissolve and stabilize the ergotamine, and the solution is diluted to volume with methanol.
Methane
Definition:
(n.) A light, colorless, gaseous, inflammable hydrocarbon, CH4; marsh gas. See Marsh gas, under Gas.
Example Sentences:
(1) A new type of Escherichia coli mutant which shows increased sensitivity to methyl methane sulfonate but not to UV light or to gamma rays was isolated after mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine.
(2) The possibility that mammalian DNA topoisomerase II is an intracellular target which mediates drug-induced DNA breaks is supported by the following studies using 4'-(9-acridinylamino)methane-sulfon-m-anisidide (m-AMSA): (a) a single m-AMSA-dependent DNA cleavage activity copurified with calf thymus DNA topoisomerase II activity at all chromatographic steps of the enzyme purification; (b) m-AMSA-induced DNA cleavage by this purified activity resulted in the covalent attachment of protein to the 5'-ends of the DNA via a tyrosyl phosphate bond.
(3) These parameters are compared with those of various model groups and compounds: CH2, peptide, methane, ethane, and the 1--13 N-terminal fragments of ribonuclease.
(4) It could perhaps be used in natural gas stations, where a synthetic gas is first produced by reacting the methane with steam to produce carbon dioxide and hydrogen.
(5) It is suggested that acetylene reduction assays may not be accurately applied to samples containing methane oxidizing bacteria.
(6) Certain methane- and methanol-oxidizing bacteria were grouped on the basis of serological cross-reacting enzyme specificities.
(7) The growth yield was 5.8 mg of cells (dry weight) per mmol of methane and was not dependent on the kind of methyl compound used as substrate.
(8) Various inhibitors that affected methane formation (e.g.
(9) The new methane rules – which will be formally unveiled on Wednesday - are the last big chance for Obama to fight climate change.
(10) Completely demineralized root powder was subjected to solutions of varying pH and ionic strength: (a) 0.1 M acetic acid, pH 4.0, (b) 0.1 M acetic acid + 0.15 M KCl, pH 4.0, (c) 0.1 M Hepes, pH 7.0 or to (d) 0.1 M Hepes + 0.15 M KCl, pH 7.0 at 37 degrees C. The surfaces of intact root specimens were exposed to 0.1 M acetic acid, pH 4.0 (which resulted in erosive lesions) or to 0.1 M lactic acid, 0.2 mM methane hydroxy diphosphonate, pH 5.0 (which produced subsurface lesions) at 37 degrees C. After incubation, the extracts were analysed for soluble collagen and the insoluble matrices were treated with trypsin at 15 degrees C to determine the denatured collagen.
(11) Particularly an automatic apparatus for monitoring total organic substances less methane, and one, employing specific detection and selective columns for the automatic and continuous determination of light sulfur compounds, are described.
(12) The ratio of methane (CH4) to CO2 in the abomasum gas was higher than that in the rumen.
(13) Hydrogen and methane are products of colonic bacterial metabolism.
(14) Other sources were monosodium methylarsenate (4 cases), dodecyl ammonium methane arsonate (5 cases), and other compounds (12 cases).
(15) The gas produced contained between 56 and 59% of methane.
(16) The present results reveal aspects of how both protein B and substrate can regulate electron transfer into and out of the hydroxylase component of methane monooxygenase.
(17) Using a complex, but soluble supplement (whey powder) it is shown that reproducible incremental measurements can be made and that the supplement used gives increases in production of characteristic end-products only (carbon dioxide, methane, acetic and butyric acids).
(18) Nickel did not alter methane production, carcass characteristics or ruminal volatile fatty acid proportions.
(19) Barack Obama has defied a Republican Congress to move ahead on his climate agenda on Wednesday, cracking down on methane emissions from America’s oil and natural gas boom.
(20) Twenty-six Acinetobacter calcoaceticus proline auxotrophs were isolated after ethyl methane sulfonate mutagenesis.