Metric measurements, converting

Brix is the percentage by weight of the solids in a pure sucrose solution. By general acceptance, the Brix represents the apparent solids in a sugar solution as determined by the Brix hydrometer or other densi-metric measurement converted to the Brix scale. 

Viscometry measurements were made in benzene at 30 °C and in TFE at 50 °C with uncalibrated Cannon-Ubbelohde dilution viscometers which gave solvent times greater than 100 seconds. The viscometers used had centistoke ranges denoted by viscometer sizes of 50 and 75 for benzene and TFE, respectively. Stock solutions were made up on gram solute/100 gram solution basis and converted to gram/deciliter via the solvent density at the temperature of measurement. The solvent densities used were d ene = 0.8686 (11a) and dlra = 1.3429 obtained from pycno-metric measurements (12). The density—temperature relationship for TFE obtained from regression analysis of the experimental pycnometric data is... 

Other Conditions That May Benefit from Saw Palmetto Converting to Metric Measurements Glossary... 

The same prefixes are used with mass as with distance, and they have the same meanings. That is one facet that makes the metric system so easy. In the English system, the subdivisions of a yard are a foot—one-third of a yard—and an inch—one-thirty-sixth of a yard. The subdivision of an Avoirdupois pound is an ounce, one-sixteenth of a pound. The subdivision of a Troy pound is an ounce, one-twelfth of that pound. (Gold and silver are measured in Troy ounces.) Each type of measurement has a different subdivision, and none is a multiple of 10. The metric system uses the same prefixes for all types of measurements, they are all multiples of 10, and they always mean the same thing. The symbols for the units and prefixes are easier to learn than those for the English system units. For example, pound is abbreviated lb and ounce is oz, whereas the metric prefixes are almost always closely related to their names. It is easier to convert metric measurements because the prefixes mean some multiple of 10 times the fundamental unit. 

Patients are usually more comfortable self-administering medication if the dose is in household measurements. However, medication is recorded using metric measurements. Therefore, a nurse must be able to convert household measurements to metric measurements. 

All doses are calculated using the metric system. You must be able to convert within the metric system and convert between household measurements and metric because patients are likely to self medicate using household measurement—such as a teaspoon— rather than using metric measurements. 

The density of steel is 0.283 Ibm/in. In the SI metric system, this measurement converts to approximately... 

The specification of wires can be confusing. All wires diameters are based upon the American Wire Gauge (AWG) table, published in the early 20th century. The metric countries directly converted these dimension (inches) to millimeters and created what is now the lEC R20 wire table. This is shown below in both measurement systems in Table F-t. 

As depicted in Figure 6.8 the stability screening was based on DERA activity assay, the retro-aldol reaction of 2-deoxy-D-ribose 5-phosphate to acetaldehyde and D-glyceraldehyde 3-phosphate. D-glyceraldehyde 3-phosphate is further converted by the auxiliary enzymes triose phosphate isomerase and glycerol phosphate dehydrogenase. As the latter reaction consumes NADH it can be measured spectro-pho to metrically by the decrease in absorbance at 340 nm. 

Table 4-2 shows how some of the basic metric units are related to units commonly used in English-speaking countries for nonscientitle measurements. Although the United States, Great Britain, and Canada have officially resolved to convert to the metric system, it will be many years before the conversion is complete. In the meantime, you must learn to convert from one system to the other. The three conversion factors given in Table 4-2 (rounded off to 2.54... 

A conversion factor is a statement of equality between two measurements of the same object or property. As a beginning example, let s explore converting between metric quantities. For example, a length of 1 m obviously has a length of 1 m ... 

For direct conversions between metric and U.S. customary units, use the following tables. However, if you intend to convert an entire U.S. customary formula using 32 ounces of liquid to a metric formula using 1 liter, or vice versa, use the compound equivalents following these tables. To convert an individual measure, use the direct equivalents. 

The following compound conversion formula can be used to convert liquid measures from metric to U.S. customary ... 

In the United States, measurements made with metric units were not legally accepted in commerce until 1866. In 1875 the United States became a signatory to the Metric Convention, and by 1890 it received copies of the International Prototype meter and kilogram. However, rather than converting our measurement system to metric, in 1893 Congress decided that the International Prototype units... 

For some readers (especially Americans), the metric system (other wise known as the SI system) is vague, or somewhat unfamiliar. 99% of all the units of weight and measurement in this book are given using the SI system therefore, a translation from one unit to another may be needed for some to fully interpret the quantities. As most people are probably aware however, most laboratory equipment is automatically calibrated in SI units, so even inexperienced persons will not have to worry too much about knowing the SI system. Regardless, try a few conversions of your own just for practice. Example Convert 150 Celsius into Fahrenheit—Solution multiply 150 by 1.8 and then add 32. The answer would be 302 Fahrenheit. Example 2 Convert 1.2 gallons into milliliters—Solution multiply 1.2 by 3,785. The answer would be 4542 milliliters. 

Quantitative calculations and qualitative interpretations are fundamental to fully grasp the concepts of chemistry. Quantitative values must include a number and a unit. Two common units of measurement are the conventional (English) system and the metric system. The conventional set of units includes inches, feet, miles, gallons, and pounds. These units, although common in the United States, are not used in science or by most of the world. However, the metric system is becoming more common in the United States. The metric system s base-10 units are easier to use and essential for scientific calculations. However, because most readers of this book are more familiar with the conventional system, it will be necessary to convert to and from the metric system. 

Dimensional analysis is the method to convert a number from one unit to another using a conversion factor. Conversion factors establish a relationship of equivalence in measurements between two different units. Examples of conversion factors are tabulated in Table 3.1 (metric prefixes) and Table 3.3 (common conversion factors). 

Convert your metric mass measurements from kilograms to grams. 

You definitely must not confuse the standard atmosphere with atmospheric pressure. The standard atmosphere is defined as the pressure (in a standard gravitational field) equivalent to 1 atm or 760 mm Hg at 0 C or other equivalent value, whereas atmospheric pressure is a variable and must be obtained from a barometer each time you need it. The standard atmosphere may not equal the bara-metric pressure in any part of the world except perhaps at sea level on certain days, but it is extremely useful in converting from one system of pressure measurement to another (as well as being useful in several other ways to be considered later). Expressed in various units, the standard atmosphere is equal to... 

Patients use the apothecaries system to measure medication when they self-medicate however, the medication may be delivered in metric units. Therefore, the healthcare provider must convert the prescribed dose from metric units to units of the apothecaries system. Use factors in Table 7.3 to convert values. The most common conversions are milliliters to teaspoons, tablespoons, or cups. A cup is measured in ounces. Another common conversion is pounds to kilograms. 

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