Linear regression

Enantiomeric purity The enantiomeric purity is an important issue to produce pharmaceutical products of acceptable quality. The mobile phase was optimized to discriminate ESO and S-NAP from their chiral impurity (R-isomer). For checking the method ability to separate the chiral impurities from the active isomers of each drug, spiking of the prepared pure S-NAP and ESO isomers with their corresponding racemic mixtures at 1%, 2% and 5% levels of the main peak was done. Method optimization was…

Isocost curve is that curve represents the combination of inputs that will cost the producer the same amout of money. We get the slope of the isocost line. The isocost line shows the various combinations of labor and capital a firm can buy with a given price. The slope of isocost line = PL/Pk. In the given equation, the price of labour is indicated by PL and the price of capital is given by PK. The isocost line may change if the amount of money spent to buy factors changes but the slope…

From a macroeconomic perspective globalization should be good for society. However, in a microeconomic world there can be an extreme amount of community pain as the world succeeds – economically speaking – while the local region collapses. Regions that are taking time to better understand why some succeed and others fail have a better chance of being prosperous as opposed to unsuccessful and ineffective in maintaining a standard of living. One way to go about success in the future is to…

Natural selection Natural selection follows inevitably from inherited variation in the ability to reproduce to pass their progeny from generation after generation. The systematic accumulation of chance variations is the only process that can lead to biological adaptations, thereby produced organisms that can live in extreme environments and on diverse energy sources (Nealson, 1999). When applied to natural evolution, question arises whether actual rates of adaptation are close to any limitation…

the range 11.0–13.0. AMG also exhibited a fluorescence turn-on response to water in various organic solvents such as 1,4-dioxane, DMF, CH3CN, and EtOH. The peak intensity of the fluorescence was almost proportional to the amount of water. Two linear regression curves were used to quantitatively detect a broad range of water content in each solvent.…

eight species are significantly correlated with temperature and seven species arriving earlier during warmer years. (Elizabeth R.E et.al) Scientists at Fargo, ND have studied 83 species of birds for their arrival time over ten years. The study concluded that the majority of arriving earlier than they did historically. The uniqueness of this study is that they measured FAD (First arrival dates) and AGDU (Accumulated growing degree units). The accumulated growing degree units for a time of arrival…

Determination of Most Advantageous Sequestering Agent By: Kayla Jeeter and Ashley Driscoll Chemistry 112-508 Abstract The creation and execution of this project served to determine what material is a better sequestering agent of the polycyclic aromatic hydrocarbons (PAHs) that are found in Texas’ water. Charcoal is currently the most typical agent used to sequester PAHs. In this experiment, two different Bentonite clays (zeolites) were synthesized, one magnetized and one not, to determine if…

Chitin is the second most abundant natural polysaccharide consisting of β(1→ 4)-linked N-acetyl-D-glucosamine (GlcNAc) units in a linear form. Chitin is insoluble in water and mainly exists in two crystalline (α- and β-) forms. The α-chitin consists of sheets of tightly packed alternating parallel and antiparallel chains (1) and is abundant in the exoskeleton of arthropods, insects, fungi, and yeast cell walls. The chains are arranged in parallel orientation in β-chitin (2), which occurs less…

be used to measure the intensity of association between variables. The data must be normally distributed. It defines both the strength and direction of the linear relationship between two variables. It does not imply causation. Regression analysis Regression quantifies the numerical relationship between 2 variables that are correlated. Regression is better suited for studying functional dependencies between factors. It creates an equation where in if one variable is known, the other can be…

The search for the origins of humankind and the earliest human ancestor has intrigued anthropologists for generations. New evidence, while often scarce, is a vital aspect to the understanding and development of the field of paleoanthropology. Current research aids in the modification of the human ancestral tree and the analysis of various sites. One of the newest sites dealing with human evolution is the Rising Star cave system in South Africa, where a new species of human ancestors, Homo naledi…