Friday, February 8, 2008
Fri-Day 1
Bio- HW: the rest of the section 39.2 outline was due on Friday.
Bring the hw in by Monday, if you forgot it today.
We finished our Immune System unit by discussing LEUKEMIA, which occurs when white blood cells divide uncontrollably due to some environmentally caused or genetically caused abnormality in these cells. These abnormal white blood cells do not help your immune system but instead cause the depletion of nutrients and energy from your body.
We then looked at the lymphatic system, which is a network of white blood cell and lymph-fluid carrying vessels as well as the lymph "filters" called lymph nodes. The lymph nodes filter bacteria and used up lymphocytes (white blood cells); so, when you are actively fighting a pathogenic infection, your lymph nodes will swell with the filtered dead pathogens.
The lymphatic system has non-immune functions also such as maintaining plasma fluid balance in the blood and absorbing digested fatty acids from the small intestines via lacteals.
We then did a lab simulation in which we saw how quickly an infection could spread through a community of individuals who have no innate or acquired immunity (via vaccination). Here is the video that we saw before the lab:
http://www.immunisation.nhs.uk/About_Immunisation/Science/How_immunisation_works_-_animation
I will post all of the worksheet answers and some of the objective answers. Check Blackboard by Sunday.
Chem 7- I changed a few molecules from this week's lab activity in order to discount the molecules that are not on the Regents exam. I've posted the revised file and the answer key on Blackboard so that you can check your work from this week.
we finished the organic chem reaction types, describing and drawing out alcoholic fermentation; this process requires specific enzyme catalysts which speed up the conversion of glucose to ethanol and carbon dioxide.
We then revisited esterification by showing how to determine, from just the condensed structural formula, the alcohol and organic acid that forms a given ester. Just chop the formula AFTER the COO such that it is on one side of your division. For example, CH3COOCH2CH2CH3 is split into CH3COO and CH2CH2CH3 which shows that ethanoic acid and 1-propanol was used to make the ester, propyl ethanoate.
We described and explained the physical properties (boiling points, electrical conductivity) of organic molecules and found that most molecules have relatively low boiling points (compared to salts or metals) due to the weak induced dipole attractions among most hydrocarbons. We saw that organic molecules that have C-O bonds have slightly higher boiling points due to dipole-dipole attractions between the molecules. Alcohols and carboxylic acids have even higher boiling points due to the "hydrogen bonding" attractions between the molecules, which occur due to the extremely polar O-H covalent bonds within each molecule.
Chem 8/9- I changed a few molecules from this week's lab activity in order to discount the molecules that are not on the Regents exam. I've posted the revised file and the answer key on Blackboard so that you can check your work from this week.
we finished the organic chem reaction types, describing and drawing polymerization, saponification and alcoholic fermentation; fermentation requires specific enzyme catalysts which speed up the conversion of glucose to ethanol and carbon dioxide.
We then revisited esterification by showing how to determine, from just the condensed structural formula, the alcohol and organic acid that forms a given ester. Just chop the formula AFTER the COO such that it is on one side of your division. For example, CH3COOCH2CH2CH3 is split into CH3COO and CH2CH2CH3 which shows that ethanoic acid and 1-propanol was used to make the ester, propyl ethanoate.
We described and explained the physical properties (boiling points, electrical conductivity) of organic molecules and found that most molecules have relatively low boiling points (compared to salts or metals) due to the weak induced dipole attractions among most hydrocarbons. We saw that organic molecules that have C-O bonds have slightly higher boiling points due to dipole-dipole attractions between the molecules. Alcohols and carboxylic acids have even higher boiling points due to the "hydrogen bonding" attractions between the molecules, which occur due to the extremely polar O-H covalent bonds within each molecule.
Bring the hw in by Monday, if you forgot it today.
We finished our Immune System unit by discussing LEUKEMIA, which occurs when white blood cells divide uncontrollably due to some environmentally caused or genetically caused abnormality in these cells. These abnormal white blood cells do not help your immune system but instead cause the depletion of nutrients and energy from your body.
We then looked at the lymphatic system, which is a network of white blood cell and lymph-fluid carrying vessels as well as the lymph "filters" called lymph nodes. The lymph nodes filter bacteria and used up lymphocytes (white blood cells); so, when you are actively fighting a pathogenic infection, your lymph nodes will swell with the filtered dead pathogens.
The lymphatic system has non-immune functions also such as maintaining plasma fluid balance in the blood and absorbing digested fatty acids from the small intestines via lacteals.
We then did a lab simulation in which we saw how quickly an infection could spread through a community of individuals who have no innate or acquired immunity (via vaccination). Here is the video that we saw before the lab:
http://www.immunisation.nhs.uk/About_Immunisation/Science/How_immunisation_works_-_animation
I will post all of the worksheet answers and some of the objective answers. Check Blackboard by Sunday.
Chem 7- I changed a few molecules from this week's lab activity in order to discount the molecules that are not on the Regents exam. I've posted the revised file and the answer key on Blackboard so that you can check your work from this week.
we finished the organic chem reaction types, describing and drawing out alcoholic fermentation; this process requires specific enzyme catalysts which speed up the conversion of glucose to ethanol and carbon dioxide.
We then revisited esterification by showing how to determine, from just the condensed structural formula, the alcohol and organic acid that forms a given ester. Just chop the formula AFTER the COO such that it is on one side of your division. For example, CH3COOCH2CH2CH3 is split into CH3COO and CH2CH2CH3 which shows that ethanoic acid and 1-propanol was used to make the ester, propyl ethanoate.
We described and explained the physical properties (boiling points, electrical conductivity) of organic molecules and found that most molecules have relatively low boiling points (compared to salts or metals) due to the weak induced dipole attractions among most hydrocarbons. We saw that organic molecules that have C-O bonds have slightly higher boiling points due to dipole-dipole attractions between the molecules. Alcohols and carboxylic acids have even higher boiling points due to the "hydrogen bonding" attractions between the molecules, which occur due to the extremely polar O-H covalent bonds within each molecule.
Chem 8/9- I changed a few molecules from this week's lab activity in order to discount the molecules that are not on the Regents exam. I've posted the revised file and the answer key on Blackboard so that you can check your work from this week.
we finished the organic chem reaction types, describing and drawing polymerization, saponification and alcoholic fermentation; fermentation requires specific enzyme catalysts which speed up the conversion of glucose to ethanol and carbon dioxide.
We then revisited esterification by showing how to determine, from just the condensed structural formula, the alcohol and organic acid that forms a given ester. Just chop the formula AFTER the COO such that it is on one side of your division. For example, CH3COOCH2CH2CH3 is split into CH3COO and CH2CH2CH3 which shows that ethanoic acid and 1-propanol was used to make the ester, propyl ethanoate.
We described and explained the physical properties (boiling points, electrical conductivity) of organic molecules and found that most molecules have relatively low boiling points (compared to salts or metals) due to the weak induced dipole attractions among most hydrocarbons. We saw that organic molecules that have C-O bonds have slightly higher boiling points due to dipole-dipole attractions between the molecules. Alcohols and carboxylic acids have even higher boiling points due to the "hydrogen bonding" attractions between the molecules, which occur due to the extremely polar O-H covalent bonds within each molecule.
# posted by C @ 8:05 AM 
