CONOCOPHILLIPS, Houston, the third-largest U.S. oil company, bought 40percentt of a Venezuelan natural gas tract from ChevronTexaco Corp., San Ramon, Calif .
We sought to categorize the type and frequency of lesions found on baseline colposcopy evaluation in healthy women to describe natural lower genital tract changes due to environmental factors.
Since humans are repeatedly exposed to natural upper respiratory tract infections that induce inflammation and antigen-specific immune responses with no obvious deleterious effects to the host, it seems unlikely that adjuvant-dependent or antigen-specific immune responses induced by nasal immunization would initiate adverse effects in the host.
Vaccine-induced or natural upper respiratory tract infection in humans may not engender an optimally protective memory Tc-cell population because of insufficient number or composition.
Cultures induced by IPTG for 2 hr were lysed through sonication, and recombinant ASR1 protein was purified with a pre-packed Ni2+column (HisTrap Kit, Pharmacia Biotech) using its natural histidine-rich tract as a tag.
The companies said they were being blocked from extracting oil and natural gas from tracts that the federal government sold them in the 1980's.
It would seem that on the local grouse moors, some lying within an "area of outstanding natural beauty", large tracts of land are rendered inhospitable for these most beautiful forms of life.
To achieve conservation of biodiversity and ecological functions of natural ecosystem, large tracts were taken over by the Governments in many developing countries.
Interestingly, even in one of its natural environments-urinary tract-where a continuous dilution of acetate occurs, it has been shown that metabolizing acetate to acetyl-CoA by Acs is not essential for normal E. coli colonization as PTA-ACKA pathway and maintenance of a proper intracellular acetyl-P concentration are necessary for colonizing murine urinary tract [ 32].
Interestingly, in both cases the dominant B cell epitopes recognized in the natural host reside outside tracts of PARCEL motifs [ 15, 16].
