isidalf raychell janeska
Rodney Liuzzo
Water (1985) is a comedy movie with Michael Caine. In this movie Caine plays therole of the governor of the Caribbean island of Cascara, a British colonyforgotten by London and rich in sources of mineral water. After the decisionof a Texan tycoon to exploit these sources and a conflict with him and London,with the support of a couple of independists (Casacarian Liberation Front)Casacara gets its independence.
Roberto Miramontes Ibarra, 20 November 2004
During the finals credits of the movie the flag appears: Yellow background with a redcircle with a palm tree inside a semi-circle with a green wave.
Roberto Miramontes Ibarra, 20 November 2004
Water (1985): A tiny and impoverished Caribbean island is basically forgotten and not taken care of until an oil well strikes mineral water. Suddenly, Britain, America, Cuba, and France all start fighting for control of the island. This comedy stars Michael Caine.
Waterworld (1995): Considered a flop when it came out because of the $175 million spent on making this Hollywood extravaganza, Kevin Costner struggles for survival in a post-apocalyptic world where the Earth is flooded and all the land is submerged.
Flow (2008): This award-winning independent documentary by Irena Salina focuses on the privatization of water and the world water crisis. Including interviews with people who are implementing solutions, it addresses issues related to politics, pollution, human rights, and the emergence of a domineering world water cartel.
Ethiopia, 1985: Near a World Vision feeding center in Sanka, people rise with the dawn after sleeping outside all night, hoping to find relief from the famine that gripped the country. (1985 World Vision/photo by Steve Reynolds)
Men and women ravaged by the Ethiopian famine build an earthen dam to create a giant water catchment. The World Vision program helped restore livelihoods for survivors of the of the drought by supporting food security, nutrition, and health. (1987 World Vision/photo by John Schenk)
A farmer plows a field in the Antsokia Valley, Ethiopia, in 2015. Thirty years before, World Vision operated an emergency feeding center here. Now, families are thriving because of hard work and development assistance to equip them with water and improved agriculture. (2015 World Vision/photo by Chris Huber)
A perfect storm of adverse events led to the Ethiopia famine: recurring drought, failed harvests, food scarcity, conflict that kept aid from reaching people in occupied territory, and government policies that relocated families and routed relief to certain areas.
Aid organizations, including World Vision, rallied to bring relief to starving children and families during the famine, but much more help was needed. When BBC reporter Michael Buerk, traveling with World Vision, brought stories and images from a feeding site to home television sets in October 1984, masses were moved to donate to the relief efforts.
World Vision began working in Ethiopia in 1971. Responding to the historic famine, World Vision airdropped food into drought-plagued communities three years before the famine hit television screens. In fact, the BBC journalists traveled in a World Vision Twin Otter plane to witness the scenes of famine they filmed for the news report in October 1984 that launched international support.
Globally, acute food insecurity continues to rise. Ethiopia joins Afghanistan, Somalia, South Sudan, and Yemen as countries with populations that are facing or are at risk of starvation or catastrophic conditions.
Gradient elution (GE) with water/acetonitrile containing trifluoroacetic acid (TFA) is commonly used for the analysis or fractioning of peptides and proteins. This can result in a bulge in the baseline and ghost peaks, making it difficult to determine how to perform data processing. We will investigate this issue on this page.
Fig. 1 shows a 3D chromatogram obtained by gradient elution with Liquid A and Liquid B, with the concentration of Liquid B increased from 0 to 100 %. Liquid A is a 0.01 M aqueous solution of TFA and Liquid B is a 0.01 M acetonitrile solution of TFA. The peak (a) near the time when Liquid B first reaches the detector, the bulge (b) and depression (c) near 200 nm, and the bulge (d) near 225 nm due to the increase in Liquid B are clearly shown.
Fig. 2 shows what we get by removing the column and performing gradient elution using the tubing only. The major difference is that peak (a) in Fig. 1 has disappeared. This indicates that the peak resulted from elution of TFA or impurities in the mobile phase that were retained in the column. Conversely, bulges (b), (c), and (d) were deemed to be inherent to the method. Fig. 3 shows the data from Fig. 2 as chromatograms. It shows the smallest baseline fluctuations around 215 nm. At low wavelengths, the curves bulge before dropping. At long wavelengths, the concave curves gradually rise.
So, it might appear that measurements can be performed safely near 215 nm, but this is not necessarily the case. Fig. 4 shows chromatograms of measurements at 215 nm while changing the wavelength bandwidth. It shows that the baseline fluctuates significantly as the wavelength bandwidth expands. This effect seems to occur due to a shift toward the short-wavelength side. Near 215 nm, the changes in absorbance toward the short-wavelength end are greater than the changes in absorbance toward the long-wavelength end (Fig. 5). As a single-wavelength UV-VIS detector normally offers a wavelength bandwidth of approximately 8 nm, care is required when performing gradient elution at 50 % or more Liquid B.
Now, let's take a look at the spectra of Liquid A and Liquid B. Although they both contain the same concentration of TFA (0.01 M), the spectra differ considerably, as shown n Fig. 6. So, the baseline fluctuations during gradient elution described above do not result from the proportion of mixing of Liquid A and Liquid B, rather due to the changes in their spectra. So, why does the absorption spectrum change as the proportion of acetonitrile increases? Possible reasons are (1) it suppresses the dissociation of TFA and (2) a mutual interaction between TFA and acetonitrile. As an experiment, we maintained the dissociation state of the TFA as constant as possible. Instead of water, we used 0.1 M phosphoric acid (sodium) buffer solution (pH 2.1) containing dissolved TFA as the solvent for Liquid A. (As shown in Fig. 6, the spectrum of this buffer solution is almost identical to water). Then performed gradient elution, increasing the concentration of Liquid B from 0 to 70 %. No irregular fluctuations of the baseline could be observed, as shown in Fig. 7. Consequently, the changes in the spectra are thought to be caused by the dissociation of TFA. (Increasing the percentage of acetonitrile shifts the equilibrium below to the left.)
Using another organic acid, such as acetic acid, instead of TFA results in similar baseline fluctuations. So, before jumping to a conclusion that a problem has occurred, check if the fluctuations are appropriate or if issues have occurred with qualification or quantification.
Reference: G. Winkler, et al., J. Chromatogr., 347 (1985) 83-88.