Given a passage classify if the passage has a definite objective/aim/goal or not. Output '1' if the passage has a defininte objective/aim/goal and output '0' if the passage does not have a definite objective/aim/goal.

Environmental ozone can rapidly degrade cyanine 5 (Cy5), a fluorescent dye commonly used in microarray gene expression studies. Cyanine 3 (Cy3) is much less affected by atmospheric ozone. Degradation of the Cy5 signal relative to the Cy3 signal in 2-color microarrays will adversely reduce the Cy5/Cy3 ratio resulting in unreliable microarray data.', 'Ozone in central Arkansas typically ranges between approximately 22 ppb to approximately 46 ppb and can be as high as 60-100 ppb depending upon season, meteorological conditions, and time of day. These levels of ozone are common in many areas of the country during the summer. A carbon filter was installed in the laboratory air handling system to reduce ozone levels in the microarray laboratory. In addition, the airflow was balanced to prevent non-filtered air from entering the laboratory. These modifications reduced the ozone within the microarray laboratory to approximately 2-4 ppb. Data presented here document reductions in Cy5 signal on both in-house produced microarrays and commercial microarrays as a result of exposure to unfiltered air. Comparisons of identically hybridized microarrays exposed to either carbon-filtered or unfiltered air demonstrated the protective effect of carbon-filtration on microarray data as indicated by Cy5 and Cy3 intensities. LOWESS normalization of the data was not able to completely overcome the effect of ozone-induced reduction of Cy5 signal. Experiments were also conducted to examine the effects of high humidity on microarray quality. Modest, but significant, increases in Cy5 and Cy3 signal intensities were observed after 2 or 4 hours at 98-99% humidity compared to 42% humidity.
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Recently, it has been shown that exposure to welding fumes containing both zinc and copper leads to asymptomatic systemic inflammation in humans as shown by an increase of blood C-reactive protein. In the present study, it was investigated which metal is responsible for this effect.', 'Fifteen healthy male subjects were exposed under controlled conditions to welding fumes containing either zinc, or copper, or copper and zinc.', 'For each exposure blood C-reactive protein increased.
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Intracellular heme plays versatile roles in a variety of physiological processes including mitochondrial respiration. Heme also induces the expression of genes such as heme oxygenase-1 (HO-1) by inactivating the transcription repressor Bach1 through direct binding. However, the source of heme for the regulation of the Bach1-HO-1 axis has been unclear. Considering that extracellular heme exists as a complex with hemopexin (Hx) in serum under the physiological conditions, heme-Hx complex may deliver heme for the gene regulation.', 'Using a mammalian expression system, high secretory recombinant Hx (rHx) was developed. We examined the effects of rHx-bound heme on HO-1 expression and Bach1 in Hepa-1c1c7 liver cells and THP-1 macrophage cells. We investigated the uptake pathway of rHx-bound heme by treating cells with chlorpromazine (CPZ).', 'rHx-bound heme induced the expression of HO-1 and decreased the level of Bach1 protein. CPZ inhibited the induction of the HO-1 expression by rHx-bound heme.

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