(n.) A white or gray crystalline salt, with a slight alkaline taste, used as a flux, in soldering metals, making enamels, fixing colors on porcelain, and as a soap. It occurs native in certain mineral springs, and is made from the boric acid of hot springs in Tuscany. It was originally obtained from a lake in Thibet, and was sent to Europe under the name of tincal. Borax is a pyroborate or tetraborate of sodium, Na2B4O7.10H2O.
Example Sentences:
(1) The relation of respiratory symptoms, pulmonary function, and abnormalities of chest radiographs to estimated exposures of borax dust has been investigated in a cross sectional study of 629 actively employed borax workers.
(2) In the borax zone the pH is increased compared with the pH of the mobile phase, and when omeprazole (a weak acid) is co-eluting in the borax zone its retention is affected.
(3) 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.
(4) Myelin staining was achieved with Harris' hematoxylin when sections were delipidized and were differentiated in either acid-formalin or borax-ferricyanide.
(5) Crude borax ore and kernite ore induced weak transformation that was not dose-dependent and was not reproducible in another experiment.
(6) Laboratory bioassays with Culicoides variipennis larvae from Borax Lake, CA, indicated an LC90 of 16.8 ppb for pyrethrins at 23 degrees C. A field test in a pond adjoining the lake reduced adult C. variipennis emergence greater than 99% for over 30 days after treatment at a rate of 131 ppb pyrethrins.
(7) In the first case we used Bathurin in combination with borax at a concentration of 1.3% for both substances.
(8) Hepatitis B surface antigen (HBSAg) adsorbed from sera onto colloidal silica could be completely eluted through the use of 0.25% sodium deoxycholate in 0.01 M borax, pH 9.3, at 56 degrees C. The HBSAg recovered in the eluate represented 100% of that present in the original serum, and it was contaminated by only trace amounts of serum proteins (in decreasing amounts: beta-lipoprotein, immunoglobulin G, albumin).
(9) The size of the zone varies with the concentration of borax in the sample injected.
(10) By using of dehydration borax as purification agent during melting alloy was illustrated.
(11) Microheterogeneity of human serum albumin was studied by isoelectric focussing in ampholines and the borax-borate buffer-mannite system within the pH range 4.0--6.0 and by fractional precipitation in 3 M KCl.
(12) Dibucaine was dispersed in the gel which was prepared by gelation of the konjac flour in a borax solution at 60 degrees.
(13) To overcome these deficiencies, 3 changes in the method were made: (1) the defatting step was modified to use sodium lauryl sulfate in combination with borax for better defatting; (2) 40% isopropanol was substituted for 60% ethanol as the aqueous phase for cleaner papers; and (3) mineral oil was substituted for n-heptane to improve hair recoveries.
(14) Borax dust appears to act as a simple respiratory irritant and perhaps causes small changes in the FEV1 among smokers who are heavily exposed.
(15) Amongst the traditional medicines, it was noticed that sodium tetraborate (borax) and alum reduced appreciably the fluid requirement in many cases of acute childhood diarrhoea.
(16) pills" (with borax, methanol and cocaine) were delivered freely at the chemist's shop.
(17) A method is described, which is based on mordantings with a silver nitrate solution then with a borax solution and on an physical development.
(18) Flocculation from a homogenate previously clarified by the use of borax is best suited for large-scale operation.
(19) During the course of investigation of two infants with seizure disorders it was discovered that both had been given large amounts of a preparation of borax and honey which resulted in chronic borate intoxication.
(20) DYBH-bait formulations with about 17 per cent borax are very attractive and have a good effectivity.
Crystalline
Definition:
(a.) Consisting, or made, of crystal.
(a.) Formed by crystallization; like crystal in texture.
(a.) Imperfectly crystallized; as, granite is only crystalline, while quartz crystal is perfectly crystallized.
(1) In addition to the phase diagrams reported here for these two binary mixtures, a brief theoretical discussion is given of other possible phase diagrams that may be appropriate to other lipid mixtures with particular consideration given to the problem of crystalline phases of different structures and the possible occurrence of second-order phase transitions in these mixtures.
(2) In 0.17 M Na+(aq), tRNA(Phe) exists in its native conformation and the number of strong binding sites (Ka greater than or equal to 10(4)) was estimated to be 3-4 by titration experiments, in agreement with X-ray structural data for crystalline tRNA(Phe) (Jack et al., 1977).
(3) Electron microscopy revealed the presence of a hitherto unreported peculiar "pilovacuolar" inclusion in numerous mitochondria, composed of an electron dense pile or rod within a vacuole, while globular or crystalline inclusions were absent.
(4) The advantages of the incision through the pars plana ciliaris are (1) easier approach to the vitreous cavity, (2) preservation of the crystalline lens and an intact iris, and (3) circumvention of the corneal and chamber angle complications sometimes associated with the transcorneal approach.
(5) These two crystallins were compared with respect to their native molecular masses, subunit structures, peptide mapping and amino acid compositions in order to establish the identity of each crystallin.
(6) Freeze-dried mannitol preparations were shown to be of a crystalline nature.
(7) Antigenic properties of crystalline pepsin, trypsin and chymotrypsin were studied in 9 rabbits immunised with these enzymes.
(8) X-ray diffraction spectrum of 1:8 coprecipitate (COPPT) showed no crystalline structure of AD.
(9) However, significant differences in the formation and melting of the highly crystalline phase were evident between the two polar headgroup stereoisomers.
(10) Degradation studies of the crystalline antibiotic, m.p.
(11) Crystalline derivatives of the amino sugar i. e. methyleremosaminide and methyl-N,O-acetyleremosaminide (alpha- and beta-anomers) were prepared.
(12) A systematic structural comparison of several carp gamma-crystallins with high methionine contents was made by the secondary-structure prediction together with computer model-building based on the established X-ray structure of calf gamma-II crystallin.
(13) The lens cell-free system synthesizes in addition to the crystallins, polypeptides which co-electrophorese with lens plasma membrane protein components.
(14) Arrhenius plots of the leakage rates showed breaks in the 20-25 degrees C temperature range, which correspond to the gel-liquid crystalline phase transition of the target liposomes.
(15) These results suggest that ATP modulates the functional behavior of alpha-crystallin.
(16) Because anesthetics transform the solid-gel membrane into a liquid-crystalline state, and because phospholipid membranes display an anomaly in permeability at the phase transition, dimyristoylphosphatidylcholine vesicles were studied at temperatures above the main phase transition to avoid this anomaly.
(17) By monitoring the synthesis of specific lens crystallin proteins, and the morphological and cellular changes associated with this differentiated system, we have demonstrated a close correlation between statin expression and cell commitment to the G0 nonreplicative cell cycle state.
(18) Developmental regulation of crystallin protein synthesis was observed in rat lenses between embryonic day 19 and postnatal day 21.
(19) Bovine lens calf gamma-II crystallin contains five histidine residues at sequence positions 14, 53, 84, 117, and 122.
(20) A second crystalline material was observed within cells in the 15,000 X g pellet from spinal fluid.