(n.) A resinous substance produced mainly on the banyan tree, but to some extent on other trees, by the Coccus lacca, a scale-shaped insect, the female of which fixes herself on the bark, and exudes from the margin of her body this resinous substance.
Example Sentences:
(1) Fifty-six percent of Lac+ transconjugants were resistant to the S. cremoris M12R lytic phage.
(2) We have previously shown that about 90% of total Escherichia coli lac repressor synthesized in mammalian cells is located in the cytoplasm [Hu and Davidson, Cell 48 (1987) 555-566].
(3) Hfr strains B4 and B8 transfer the Escherichia coli chromosome in opposite directions, each transferring lac(+) as the last known marker.
(4) Combined with histological analysis, these results suggest a more rapid recovery of normal spermatogenesis after physical insult with LAC treatment.
(5) The F'lac+ episome of Escherichia coli origin was transferred by conjugation with frequencies of 10(-7) to 10(-5) from Erwinia amylovora to 14 out of 15 Salmonella typhimurium trp female parents.
(6) A protein identical in properties to FIII L. casei lac was isolated from clones of E. coli carrying this DNA insert.
(7) Only one monoclonal antibody strongly inhibited cAMP binding by CRP, and this was accompanied by a consequent strong inhibition of both lac DNA binding and abortive initiation by RNA polymerase.
(8) These ends were cloned separately in lambdapMu hybrid particles that derived from a single Mu lysogen in the lac Z part of lambdaplac5.
(9) The structure of F13, a plasmid containing lac, purE, and proC, has been determined by heteroduplex analysis.
(10) In this case, resistance markers were lost when the transductants became Lac- but the derivatives remained copper resistant.
(11) Circular dichroic studies and hydropathy profiling of the amino-acid sequence of this 'lac' permease suggest a secondary structure in which the polypeptide consists of 12 hydrophobic segments in alpha-helical conformation that traverse the membrane in zig-zag fashion connected by shorter, hydrophilic domains with most of the charged residues and many of the residues commonly found in beta-turns.
(12) The strength of the STII gene promoter was compared with that of the ompF and lac operons, which were similarly fused to the lacZ gene.
(13) From the results of potassium iodide quenching of fluorescence from the tryptophans, and from attempts to react the native lac repressor with dimethyl(2-hydroxy-5-nitrobenzyl) sulfonium bromide and 2-hydroxy-5-nitrobenzyl bromide, we propose that tryptophan residue 209 is involved in a conformational change of the protein upon binding of inducer, but does not come in direct contact with inducer.
(14) In cells growing with interdivision times of 27, 36, and 55 min, the F'lac replicated at various stages in the division cycle but always at approximately the same time as initiation of chromosome replication.
(15) Expression of the blood group carbohydrates was similar in follicular and radicular cysts but differed from that seen in odontogenic keratocysts by the failure to detect N-lac in the latter.
(16) The phage lambda operator OR1 and a 18 base pair symmetric lac operator have been studied by high resolution NMR.
(17) Deletions covering all or part of the transfer region, as well as of lac and of pif, were obtained in the course of this analysis.
(18) A Mud(Ap, lac) prophage has been shown to be inserted into the ptsH gene of E. coli.
(19) From transient expression studies of the fusion gene between the chloramphenicol acetyltransferase and lac genes, it was found that the lacCAP binding site could act as an enhancer activity on the SV40 promoter, and also as an additive enhancer activity to the SV40 enhancer in HeLa cells.
(20) Expression of chlD-lac was increased in cells grown with nitrate.
Shellac
Definition:
(n.) See the Note under 2d Lac.
Example Sentences:
(1) The mad rush to reissue everything Elvis had ever recorded led to a worldwide shortage of the shellac needed for vinyl records, and Lust for Life was doomed by it.
(2) The antiseptic solutions were sodium chloride 10%, alcohol 75%, Cidex and Sterile pack fluid, whereas the dental materials were dental modelling wax, impression compound, shellac base plate and zinc-oxide eugenol paste.
(3) Side B is given a matte finish so it resembles a shellac 78rpm record.
(4) 850 gold), were processed for light microscopy (LM) in the conventional way, then covered with celloxin shellac and examined in the LM by using the upper illuminating source.
(5) 3 There was considerable inter-subject variation in plasma prednisolone levels after administration of shellac based enteric-coated tablets.
(6) Artificial "calculus", consisting of a mixture of shellac, umbra, pumice and plaster dissolved in ethanol, was painted on the root surfaces.
(7) Various shellac derivatives such as with succinic anhydride, phthalic anhydride, ethylenediamine and myristic acid were prepared.
(8) In place of conventional record blocks, shellac-based wax replicas of the existing dentures are used.
(9) After removal of the shellac from the surface of the sample by immersion in acetone, the sections were air-dried, coated with a copper layer in a vacuum evaporator and examined in a scanning electron microscope (SEM).
(10) Steve Albini with his Shellac bandmates, Todd Trainer and Bob Weston On that trip we established contacts with local promoters and arts organisations and audiences developed an appetite for our music and we have since sold quite a few records into the region.
(11) The training instrument consists of a shellac record base connected with string to an extraoral spring balance scale.
(12) I can personally vouch for two sites: the largely underrated Vouchercloud , which offers meagre but worthwhile discounts off meals and toasters, and Groupon, because it understands that most people are vain and want to shellac their nails for a song.
(13) Individual trays of plastic and shellac-bases which could be softened by heating, and a cold-curing tray material were then also examined: (1) for their distortion by slight loads upon the tray walls; (2) for their ability to retain their shape when stored, and (3) their distortion when temporarily warmed to body temperature.
(14) Where career professionals would not have been seen dead with a set of "falsies" a decade ago, these days the semi-permanent nails such as gel or Shellac are perfect for busy workers who don't have time to be tending to a chipped manicure every couple of days.
(15) Self-curing acrylic, thermoplastic acrylic and shellac were measured at fixed intervals with the aid of a measuring microscope.
(16) At the time he was doing what he continues to do today: playing in bands (such as Shellac ) and producing the music of other bands – although he prefers to call himself a recording engineer.
(17) The pathogenicity of virulent cyclic peptide toxins of the cyanobacterium, Microcystis aeruginosa, and the mushroom, Amanita phalloides, was prevented in mice by pretreatment with a variety of chemically unrelated agents including hydrocortisone, shellac, certain diazo and triazine dyes and cyclosporine.
(18) Shellac; Eudragit E and L, hydroxypropyl methylcellulose (HPMC) and HPMC-Eudragit E mixture were used as film-forming materials.
(19) The outer layer was a swellable membrane layer containing mainly polyvinyl acetate and purified shellac.
(20) Visio-Gem, cyanoacrylate, and shellac were the adhesives tested.