(1) Boric acid, propionic acid and potassium metabisulphite were used for the control of aflatoxin B1 on betel nuts.
(2) Therefore, an attempt was made to apply to 30 patients three-per-cent boric acid to cope with locally delimited Pseudomonas wound infections.
(3) Twelve solutions of 0.1 M boric acid and varying glycerol concentration were used to vary pH in a twelve-compartment commercial recycling isoelectric focusing (RIEF) system.
(4) Toxic levels of boric acid most commonly cause vomiting, depression, and, occasionally, diarrhea.
(5) The competitive inhibitor boric acid protects mesentericopeptidase against inactivation with potassium cyanate.
(6) High levels of boric acid were excreted from most of the victims.
(7) These data indicate that broilers grown on boric acid-treated litter do not consume enough boric acid to cause elevated boron levels in tissues.
(8) Reconstructions with 53 organism-antimicrobial combinations were performed at 0, 4, 8, and 24 h in which the FLORA-STAT system was compared with two boric acid-based systems (Urine C&S Transport Kit [Becton Dickinson VACUTAINER Systems, Rutherford, N.J.]; Sage Urine Collection Kit for Culture [Sage Products, Inc., Cary, Ill.]) and untreated urine.
(9) Therefore, we evaluated the Becton-Dickinson Urine Culture Kit containing a boric acid-glycerol-sodium formate preservative in a study of 1,000 clinical urine specimens.
(10) Boric acid was added as a preservative to samples of urine in preference to the use of dip-slides because it preserves pus cells as well as bacteria.
(11) Successful hydrolysis of the long acyl chain intermediate 1,2-isopropylidene-3-acyl-sn-glycerols from stearate to lignocerate was accomplished by applying the compounds to silica gel and exposing them to hydrogen chloride gas at -75 degrees C. The purity of the compounds was checked by boric acid impregnated thin-layer chromatography, 13C NMR, and reverse-phase high-pressure liquid chromatography.
(12) Inhibition was noted in nine samples after storage in boric acid, seven of which were in underfilled bottles.
(13) The inhibitory mechanisms of p-nitrophenylglycerol and boric acid are different from that of the chelating agents.
(14) Boron cluster compounds could be measured with sensitivity, precision, and accuracy similar to those of boric acid standards.
(15) Boron residue levels in the same types of tissue were not significantly elevated in chicks fed 500 ppm or 1250 ppm boric acid in feed ad libitum for 3 weeks; however, residues were significantly higher in chicks fed 2500 ppm or 5000 ppm boric acid.
(16) We found that in certain buffers, such as tris(hydroxymethyl)-aminomethane-hydrochloride, boric acid-borax, and N-hydroxyethyl piperazine-N'-2-ethanesulfonic acid-sodium hydroxide, hemoglobins released from erythrocytes were easily precipitated by addition of Zn2+, thus resulting in a false inhibition of hemolysin by Zn2+ when hemolysis was assayed by measuring absorbance at 540 nm of released hemoglobins.
(17) Comparative study of the microbicidal activity of some traditional (hydrogen peroxide, boric acid, nitrofurazone) and currently available (Baliz-2, dioxidine, chlorhexidine bigluconate, pervomur) antiseptics against the most commonly encountered causative agents of purulent surgical infection showed 0.8%, 1.2%, and 2.4% pervomur solutions to possess the highest bactericidal and sporicidal activity.
(18) We compared 1% tetracycline ointment (79 patients) or 1% rifampicin ointment (76 patients) with 5% boric acid ointment (79 patients).
(19) In connection with the discussion on a uniform regulation within the European Communities for baby-care products containing boric acid, it was of interest to which degree boric acid can be absorbed through normal or damaged skin from a common baby ointment.
(20) Addition of boric aicd (0.01%) and colchicine (0.1%) to the medium for biosynthesis increased the antibiotic activity of the fungus, this being due to the specific effect of polyploidogenous factors on growth of the mycelium and the proportion of nuclei in it.
Boron
Definition:
(n.) A nonmetallic element occurring abundantly in borax. It is reduced with difficulty to the free state, when it can be obtained in several different forms; viz., as a substance of a deep olive color, in a semimetallic form, and in colorless quadratic crystals similar to the diamond in hardness and other properties. It occurs in nature also in boracite, datolite, tourmaline, and some other minerals. Atomic weight 10.9. Symbol B.
Example Sentences:
(1) The compound caused extensive clumping, of cells, which appeared not to be related to the ability of boronates to esterify to diols.
(2) Examples are p-boronophenylalanine or boronated porphyrius.
(3) Fractions from the boronate gel column or aliquots of NaIO4-treated cell extract are quantitated directly by the RIA.
(4) The second part of the paper describes a case where neodynium-iron-boron magnets were used to assist eruption of an unerupted, vertically impacted upper right canine.
(5) A neodymium iron boron magnet is attached to the unerupted tooth, and a second, larger magnet is incorporated in a removable appliance.
(6) The various boron compounds being investigated for NCT are evaluated on the basis of necessary minimum boron content in tumor.
(7) N-Allylation of a trimethoxybenzazepine followed by cleavage of the methyl ethers with boron tribromide was the preferred method.
(8) Because boronated phenylalanine has been demonstrated to be preferentially taken up by melanoma cells through the biosynthetic pathway for melanin, there is special interest in a trial of boron neutron capture therapy for metastatic melanoma in brain.
(9) After separation by thin-layer chromatography, the bands of the lipid classes studied were scraped off, transmethylated according to the boron trifluoride-methanol procedure, and the fatty acid methyl esters were extracted and analysed.
(10) However, at 1000 and 2000 ppm boron, male fertility was significantly reduced.
(11) A parameter of major importance is the minimum concentration of boron needed in tumor in order to produce improved results in cancer therapy.
(12) Boron-11 spectral intensities decreased in the living rat over a 25-h period.
(13) In some areas, wastewater is used for irrigation and crops grown under these conditions are generally confined to those relatively insensitive to boron toxicity.
(14) These data indicate that broilers grown on boric acid-treated litter do not consume enough boric acid to cause elevated boron levels in tissues.
(15) In the course of re-assessment of boron-neutron capture therapy (BNCT) for malignant brain tumors, fractionation of neutron irradiation has been proposed.
(16) Six-day exposures of the differentiated cells to a 1-mM dose of aluminum or boron yielded increases in tau protein immunoreactivity to the monoclonal antibodies Tau-1 and Alz-50.
(17) Recovery of the serine and threonine derivatives was improved by substituting boron trifluoride-diethyl etherate for trifluoroacetic acid in the thiazolinone cleavage reactions.
(18) Boron levels in the brain dropped about 6%-8% and were more diffusely distributed on the images obtained 30 minutes after BSH infusion.
(19) The boron derivatives also caused L-1210 DNA strand scission.
(20) Glycosylation was estimated using boronate affinity chromatography with the myosin dissolved in a pyrophosphate buffer, the glycosylated myosin being displaced with sorbitol.