(a.) Pertaining to, or derived from, vegetable mold; as, humic acid. See Humin.
Example Sentences:
(1) Humic acids derive from a class of natural substances in humic substances.
(2) Humic substances, the dark-colored, natural organic polyelectrolytes that are found in practically all soils, sediments, and natural water, strongly interact with both inorganic and organic pollutants.
(3) The hydrolytic products of lignins, humic acids and industrial waste including hydroquinone, catechol, resorcinol, pyrogallol and 1,2,4-benzenetriol are widely distributed in water sources.
(4) Samples of humic acids with M(W) approximately 18,000 have been used in experiments.
(5) As regards Ames mutagenic compounds, however, chlorination of naturally occurring humic substances during the chlorine disinfection step in drinking water production, proved to be a far more important source.
(6) At 2, 6, 12 and 20 months, humic substances were extracted from samples with 0.1 M Na2P4O7 and 0.1 M NaOH, and humic acids isolated by precipitation after acidification with HCl.
(7) Typical monomeric components of humic acids had no desmutagenic effect.
(8) Isolated humic acids from offshore sediments from the North Adriatic (Lim channel, near Rovinj, Yugoslavia) were characterized according to their elementary composition, the amount of products of hydrolysis, and the trace elements bound.
(9) In the first step the interfering substances such as sulfide and humic acid substances are removed by precipitation with copper.
(10) The results of an investigation of the influence of microorgansims of the genus Nocardia on changes in the composition and properties of humic acids are presented.
(11) A recently developed membrane model of the structure of humic substances is described; this model enables one to better understand the physical-chemical properties of these materials.
(12) Naturally occurring humic substances are particular chemical compounds which are found in humus.
(13) Humic acids have qualities such as ion-exchange materials, form hydrogen bondes and are able to form salts and complexes.
(14) A number of chlorinated organic compounds, including several known mutagens, have been identified and quantified in diethyl ether extracts of chlorinated humic acid solutions.
(15) The interaction between humic substances and a strong base anion exchange resin has been studied and the results are used for characterization of the humic substances.
(16) The bioaccumulation of benzo[a]pyrene (BaP) into Daphnia magna from two natural humic waters (one lake water and one bog water), and two humus preparations (Nordic Reference fulvic acid (Nordic FA) and a lyophilized concentrate) of the same aquatic origin was measured by using several dissolved organic carbon (DOC) concentrations for each sample.
(17) Selenate was found to be slowly reduced to selenite by humic acid in acidic solution.
(18) These electrostatic interrelationships among river sand, humic acid, and bacterial cells are closely implicated in the mechanism of long-term survival of virulent A. salmonicida in river sediments.
(19) The presence of humic acids significantly reduced loss of culturability but only in low salinity conditions.
(20) Formation of humic-like substances started in the bacterial cells and was accompanied by the presence of phenyloxidases in the bacterial cultures.
Humid
Definition:
(a.) Containing sensible moisture; damp; moist; as, a humidair or atmosphere; somewhat wet or watery; as, humid earth; consisting of water or vapor.
Example Sentences:
(1) at -35 degrees C and as long as 10 hours at -5 degrees C. However, C. bovis died within 72-96 hours in muscles of cattle carcasses subjected to the activity of the temperatures minus 18-19 degrees C at a relative humidity of 86-90% under conditions of an industrial cold storage plant.
(2) Temperature, relative humidity, and air movement around the package can influence the permeability of the film.
(3) Infrared linear dichroism investigations indicate that the alternating poly[d(A-T)]-poly[d(A-T)], enzymatically synthesized, adopts a lower humidity a well-expressed A* form in which stability is relatively small,i.e., restricted to limited relative humidity.
(4) The influence of salt mixtures consisting of Ca(H2PO4)2, trace elements, CaSO4, CaCO3, Na2CO3, NaCl and K2SO4 in different combinations on the nitrifying power, evolution of carbon dioxide and the total number of bacteria was studied in arid soils (sandy and alluvial) and semi-humid ones (chernozem and rendzina).
(5) We assessed the longitudinal distribution of intra-airway heat and water exchanges and their effects on airway wall temperature by directly measuring respiratory fluctuations in airstream temperature and humidity, as well as airway wall temperature, at multiple sites along the airways of endotracheally intubated dogs.
(6) The structural transitions B leads to A and B leads to C measured as a function of relative humidities were not affected by formation of complexes with both basic polypeptides.
(7) The study was conducted to evaluate the effect of ageing on textiles (17.5 months), air temperature (25-45 degrees C) and relative air humidity (RH) (45-85%) on the CH2O release rate from 6 kinds of drapers and furniture coverings.
(8) In the absence of other factors known to influence sectioning properties, high environmental relative humidity is shown to yield poorly embedded tissue.
(9) At 10% humidity the half-life-time was only 55 min.
(10) The effects of a number of drugs, potassium and calcium ions, and air humidity on mucociliary function were studied in isolated preparations of rats bronchial tree.
(11) Minimum relative humidity and maximum and minimum temperatures on day of evening sample were associated with 1.6 to 5.6% of variability within lactation (range for two breeds) of milk and milk constituent yields and 1.1 to 16.5% of constituent percentages.
(12) The correlation analysis applied showed that the parameters most markedly influencing the grain concentration of most taxa were the temperature and humidity.
(13) A difference density map obtained from data on purple membrane films at 15% relative humidity in 2H2O, and the same sample after complete drying in vacuum, revealed that about eight of these protons belong to four water molecules.
(14) The facility presents uniform fields under controlled temperature and humidity.
(15) Humidity has been postulated as a primary determinant of particle charge during aerosol generation.
(16) At high humidities up to 98%, an increase in bacteria cannot be detected.
(17) Successful colonization and invasion of experimentally inoculated feathers required addition of moisture and elevation of relative humidity within the cultures.
(18) These samples were collected from atmospheres of either analyte generated at 35 degrees-40 degrees C and 80%-90% relative humidity to simulate an exhaled breath sample matrix.
(19) It has been established that the structure of the hormone includes a set of regular helical forms which varies considerably with the humidity and dielectric constant of the medium.
(20) The presence of Daubentonia in southern Madagascar does not demonstrate that this region was markedly more humid or densely forested in the recent past.