AP BIOLOGY LAB MANUAL LAB 111 HOW TO

You will see the sample come up into the tip.

While holding the white knob down, put the tip of the micropipette into the sample and slowly release the knob.

Push the knob down to the вЂњfirst stop.вЂќ (You will notice that you can push down farther but it is much more difficult.

Hold the micropipette in the palm of your hand with your thumb on the white, round knob.

Usually the tips need to remain sterile, so tips are never to be picked up and put on the micropipette.

Put a tip on the micropipette by firmly pressing the micropipette down into one of the tips and then twisting slightly.

Set the micropipette for 15 Ојl by turning the dial.

AP BIOLOGY LAB MANUAL LAB 111 HOW TO

Your instructor will also demonstrate how to use the Pipetman.

Practice micropipetting by following the instructions below. For example, a p200 micropippettor can pipette up to 200 Ојl while a p1000 can pipette up to 1000 Ојl, or 1 ml, of liquid. Therefore, there are _ microliters are in a liter.How many microliters are there in a milliliter?.They are commonly used by researchers, hospital lab technicians, and by scientists in the food and drug industries. Micropipettes are used to measure the volume of extremely small amounts of liquids. What are some potential sources of error in your measurements? Part 3: Micropipetting Measurement of object of your choice _.Use a ruler to make the following measurementsВ making sure to include units. You should seeВ centimeter and millimeter divisions. Examine intervals marked on the metric rulers. Length is measured with a metric ruler, a meter stick, or a measuring tape. 13 kilometers = _ meters = _ decimeters.56.2 millimeters = _ meters = _ centimeters.1 meter = _ centimeters = _ millimeters.Remember that the base unit, like a gram or a meter, is the same as 10 0 or 1. The chart on the previous page had some common metric prefixes from smallest to largest. The metricВ system is based on units of 10, so conversions from one unit to another are relatively easyВ and can be completed by moving a decimal point either adding or subtracting zeros. Larger or smaller units are created by adding prefixes to the terms above. The basic units of these measurements for the metric system are listed in the chart below. In 1960 the metric system became the basis for the International System of Units ( SI units).

The metric system was developed in France inВ 1791 so that scientists had a common unit for research comparisons. Measurements in science use metric units. Metric System from Lumen Learning Introduction

Ap biology lab manual lab 111