of natural variation of and factors contributing to the following major parameters in freshwater: a. Dissolved Oxygen b. Biochemical Oxygen Demand c. Conductivity d. Nutrients e. pH f. Alkalinity g. Hardness 6. Explain how each of the above major parameters affects organisms and the structure and function of freshwater ecosystems. Summary Chemical composition of freshwaters • Define where freshwaters lie on a spectrum of increasing
Premium Oxygen Carbon dioxide Water
Materials Engineering Department Adama Science and Technology University MAEng3301 October 15‚2013 Abstract Deferent carbon content steel examined to determine the microstructure‚ concentration and hardness of the specimens. 0.2% C‚ 0.4% C and 1.0% C steel specimens were prepared by cutting. Abrasive cutter was used to cut the steels. Furnace was used for heat treatment at 900°C to make the phases separate when seen by microscope. Mounting press was
Premium Materials science Phase Thermodynamics
quantitative data found and recorded. The qualitative data recorded entailed: Water color and smell as well as suspended solids ranging from clear‚ opaque‚ and turbid. The quantitative data that was recorded regarded: Temperature‚ pH‚ Alkalinity‚ Hardness‚ Chlorine‚ as well as‚ Nitrate‚ and Nitrite. There was also two views of microscope observations. This report will explain and go into detail regarding the results of the observation of the pond water. INTRODUCTION: MATERIALS: Water
Premium Base Observation Qualitative research
dentin‚ when used both as a root canal irrigant and as an intracanal medicament. Method: 40 extracted teeth were cleaned and shaped. A 3 mm section of each root was taken at the middle-third level and embedded in cold cure acrylic resin. Vicker’s Hardness Test was used to measure the microhardness of each specimen prior to exposure with the respective irrigants and Root anal Mediaments. Each group consisted of 20 samples. Group A samples were immersed in NaOCl for 15 minutes followed by an application
Premium Bacteria Escherichia coli Microbiology
In this lab we tested the purity of water by looking for the chemicals free chlorine‚ chloride‚ sulfate‚ nitrate‚ copper‚ total hardness‚ iron‚ hydrogen sulfide‚ lead‚ pesticides‚ pH‚ total alkalinity‚ and total chlorine inside a water sample. The chemicals that produced a 0.0 result meant that there was no trace of that chemical inside the sample. The chemicals not found were copper‚ hydrogen sulfide‚ free chlorine‚ lead‚ iron‚ pesticide‚ and total chlorine. As a class we found the results of
Premium Hard water Water Chlorine
IMPORTANT TOPICS OF CHEMISTRY 2009 Chap No.1 Q.1- Define chemistry & branches of chemistry any three? Q.2-Lrean about history of chemistry for short question and fill in the blanks? Q.3 what is scientific method? Define hypothesis and theory? CHAP NO.2 Q.1-Learns about any three laws of chemical combination only statement and example? Q.2-Define chemical reaction and types of chemical reaction with one example for each with the help of chemical equation? Q.3-Define MOLE‚ Atomic no
Premium Atom Chemistry Ionic bond
The reason why we did this is to see if the water could support life and give off conductivity for things to grow. The second test was testing the hardness‚ nitrates and nitrites‚ and the pH level of the creek. Reasons why we test this is because only certain levels of pH support life and water hardness and nitrates also affects growth. Turbidity test is where you fill a tube and measure how many inches till you can see the bottom of the tube. This test shows how dirty
Premium Water Stream Water pollution
Water quality and contamination Student’s Name Institution 20th September 2014 Water quality and contamination Introduction This report focus on factors that affects the quality of water‚ agents of water contamination and how water impurities can be removed for water quality. There are two visible features of contaminated water; colour and smell. Contaminated water usually has unusual smell and coloured. Invisible factors affecting water quality are sources of water. For instance; tap water
Premium Water pollution Water Water quality
ILLINOIS STATE WATER SURVEY LIBRARY COPY MAR 3 0 1988 ISWS/CIR-158/83 Circular 158 STATE OF ILLINOIS DEPARTMENT OF ENERGY AND NATURAL RESOURCES Consumer Attitudes Toward Public Water Supply Quality: Dissatisfaction and Alternative Water Sources by LYNN L. CURRY Southern Illinois University ILLINOIS STATE WATER SURVEY CHAMPAIGN 1983 PREFACE Public awareness of the quality of the environment and of the safety of public water supplies are related issues which have rarely received
Premium Drinking water Water Water supply
and boreal latitudes they are mostly deciduous‚ but in tropics and subtropics mostly evergreen. Hardwood contrasts with softwood. Hardwoods are not necessarily harder than softwoods. In both groups there is an enormous variation in actual wood hardness‚ with the range in density in hardwoods completely including that of softwoods; some hardwoods (e.g. balsa) are softer than most softwoods‚ while yew is an example of a hard softwood. Hardwoods have a more complex structure than softwoods. The dominant
Premium Wood Hardwood