<span><span>Implement a personal hygiene program. To lessen the possibility of food handlers contaminating food, institute a good personal hygiene program that includes policies addressing critical hand practices like proper handwashing, hand care and glove use. Also address staff cleanliness and work attire, focusing on topics such as bathing, clean clothing, the proper use of hair restraints and prohibited jewelry. Finally, policies should be put in place to make sure food handlers come to work healthy. Include actions such as reporting illnesses and covering wounds.</span><span>Remind employees to wash their hands. This is especially important after using the restroom and after handling raw meat, seafood and poultry. Once employees have washed their hands, ensure they use a single-use paper towel or hand dryer, rather than any part of their uniform, to dry. </span><span>Use separate equipment. Each type of food should be prepped and handled with a separate piece of equipment. For example, use one set of cutting boards, utensils and containers for raw poultry. Use another set for raw meat, and use a third set for produce. Some operations use colored cutting boards and utensil handles to help keep equipment separate. If this system is not possible at your restaurant, prep food at different times.</span><span>Clean and sanitize all work surfaces. All work surfaces, equipment and utensils should be cleaned and sanitized after each task. Simply rinsing equipment is not enough to eliminate pathogens that can contaminate food. </span><span>Purchase prepared food. You can prevent cross-contamination by purchasing food that doesn’t require much prepping. This minimizes handling and can reduce the transfer of pathogens from one surface or food to another.
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Answer:Chromatography is actually a way of separating out a mixture of chemicals, which are in liquid or gas form, by letting them flow slowly past another substance, which is either a solid or a liquid. It consist of a stationary phase and a mobile phase.
Explanation: All chromatographic systems rely on the fact that a substance placed in contact with two unmixable phases, one movable phase and one stationary phase, will equilibrate between them. A selectivity (or separation) factor (α) is used to 'chemically' distinguish between sample components. It is usually measured as a ratio of the retention (capacity) factors (k) of the two peaks in question and can be visualized as the distance between the apices of the two peaks. reproducible fraction will partition into each phase, depending on the relative affinity of the substance for each phase. A substance which has affinity for the moving or mobile phase will be moved rapidly through the system. A material which has a stronger affinity for the stationary phase, on the other hand, will spend more time immobilized in that phase, and will take a longer time to pass through the system. Therefore, it will be separated from the first substance. By definition, chromatography is a separation technique in which a sample is equilibrated between a mobile and a stationary phase. A theoritical plate or tray is used to produces the best possible difference between the liquid and vapour phases in equilibrium with it
Chromatographic separations are best done with a small amount of analyte (substance to be separated during analysis), which keeps either phase from becoming saturated with analyte, so that the concentrations in the two phases are directly proportional. Overloading the column with sample causes one of the phases to become saturated, leading to a loss of column efficiency, and poorly shaped peak profiles.
The retention volume in chromatographic separation (Vr) is the volume of the mobile phase required to carry the solute through the column to elution, is related to the column flow (Fc) and the retention time (tr). Likewise, the volume of the mobile phase(Vm), is related to the flow and the time the void volume takes to pass through the column.
Band broadening using the kinetic model is a phenomenon that reduces the efficiency of the separation being carried out, leading to poor resolution and chromatographic performance. This is problematical in terms of both the quality of the separation obtained and the accuracy with which sample components can be quantified.The wider band results in a dilution effect that produces a decrease in peak height accompanied by a loss in sensitivity and resolution. The eddy dispersion, accounts for the source of band broadening related to any flow unevenness in the column.
Planners and engineers are responsible for ensuring the work zone is operating properly and drivers are responsible for traveling safely through construction zones. In a work zone, drivers should always pay attention to roadway signs, construction workers on or near the road and the road's surface.
The answer to the first question is a.
I think it is 10% ......................
