Author Archive

ENVR107 – Lab 5 – Weather Analysis

Camosun College – Stefan Martensson

  1. A. Weather Observations at 10:00am – Feb 11 – Feb 18, 2010. More elaborate descriptions below.

Feb 11 – Cloudy, drizzles, some fog over the ocean, light wind, temp 8C.
Feb 12 – Cloudy, light wind, temp 8C.
Feb 13 – Cloudy, drizzles, light wind, temp 8C.
Feb 14 – Partly cloudy, slight wind, temp 8C.
Feb 15 – Partly cloudy, slight wind, temp 6C.
Feb 16 – Clear, sunny, no wind, temp 9C.
Feb 17 – Clear, sunny, no wind, temp 7C.
Feb 18 – Clear, sunny, no wind, temp 6C. Read the rest of this entry »

CHEM121 – Experiment 2

Stefan Martensson

CHEM121 – Experiment 2 – Preparation of a Standard Solution and the Analysis of an Unknown Acid.

Purpose: To use Xylenesulphonic acid (XSA) from Lab1 as a primary standard for the standardization of a sodium hydroxide solution, and use the sodium hydroxide to determine the weight of an acid that reacts with a ratio of: one mole sodium hydroxide to one mole of unknown acid. Read the rest of this entry »

ENVR103 – Biofilms

Have you ever slipped on rocks at the beach or at the river and when you tried to stand up again you felt the surface of the rock to be smooth, slick and slimy? The layer on the rock that looks and feels like the mucus layer inside your mouth; is called a biofilm.

Biofilm were first discovered by a scientist called Antonie van Leeuwenhoek in Holland more than 300years ago. Back then, he tried to kill a Read the rest of this entry »

My mentor passed away today…

The man that have ment the world to me, he who showed me the path, he who showed me the light, when things were really dark in my life some 8years ago after my back injury. That man died today. Read the rest of this entry »

Report – ENVR206B – Phytoremediation

Biology 206B, Biotechnology – Phytoremediation Report

Allanah Greenham, Alex Carota, Stefan Martensson, Brianne Smith

December 3, 2009


The reason for this experiment was to determine if water hyacinths are able to successfully absorb contaminants such as Zinc and Copper from an aqueous solution and also possible methods to improve results in the experiment for future classes. Read the rest of this entry »

Report ENVR206 – Constructed Wetlands

ENVR206B – Constructed Wetlands for Remediation Purposes

Stefan Martensson C03347318
Constructed wetlands are artificially built marshes built to treat human wastewater and stormwater. They have four key components:
• Wastewater
• Soil and drainage materials (such as pipes and gravel)
• Plants (both above and below the water)
• Micro-organisms Read the rest of this entry »

Why YOU should NOT go and vaccinate yourself against H1N1!!

Report – ENVR110 – A Study of the Relationship of Relative Humidity and Temperature

A Study at Camosun College, Lansdowne Campus of the Relationship of Relative Humidity and Temperature

Jenny Kendrick, Geoff Kerr, Stefan Martensson, Kate Musto

ENVR 110, Camosun College

November 20, 2009


Relative humidity is a ratio expressed as a percentage of the moisture in the air to the moisture it would contain if it were saturated at the same temperature and pressure (Oxford Concise Science Dictionary, 2006).  The maximum amount of water vapor that can be contained in the air is dependent on temperature.  A given volume of warm air can hold more water vapor before it precipitates than colder air can. Factors that influence relative humidity include: altitude, cloud cover, pollution, air temperature, regulated temperature in buildings and wind. Read the rest of this entry »

Report – ENVR206B – Phytomining

Over the last 10years the science behind using organic matter to extract natural resources have been developed and tested all over the planet. This technology can be used for extracting metals from the soil for economic profit – phytomining, for ecological/biological profit – phytoremediation or both. Heavy metals, i.e. chromium, arsenic, cadmium, lead, mercury, and manganese are big problems in the environment, but these metals are also expensive. If a way to extract the contaminants, even in small amounts, from the soil at a low cost, one could ‘swat two flies in one go’ by first, and primarily, remediate the heavy metals and later extract the metals from the plants and re-use them. Read the rest of this entry »

Report – CHEM120 – Determination of Water Hardness using EDTA

CHEMESTRY 120-02                                                   2009-11-17

Stefan Martensson C0347318
Lab Partner: Danielle

Procedure: Please refer to handout ‘Experiment #7’ and page 35-38, Chemistry 120 Lab Manual, 2009 Edition, Camosun College. Plus additional handout: Report and Calculation Guide.

Hard water is water that has high mineral content (mainly calcium and magnesium ions). Hard water minerals primarily consist of calcium (Ca2+), and magnesium (Mg2+) cations, and sometimes other dissolved compounds such as bicarbonates and sulfates. Calcium usually enters the water as either calcium carbonate (CaCO3), in the form of limestone and chalk, or calcium sulfate (CaSO4), in the form of other mineral deposits. Hardness in water can cause water to form scales and a resistance to soap. It can also be defined as water that doesn’t produce lather with soap solutions, but produces white precipitate (scum) (Wikipedia, 2009). Read the rest of this entry »