Tag: vapor pressure

Forward Osmosis

Osmosis is a natural process.   In its simplest form, water flows through the membrane into a solution.  It is important for plant and animal life.   Nutrients must enter cells and waste products leave.    Trees must bring nutrients from the soil to the upper most leaves (See: Maple Tree Details at DrOsmosis.com).    Experimenters found that a ….  Read More

OSMOSIS

One must fully understand the history to appreciate today’s textbook thermodynamic theory of osmosis.

Osmosis Experiment

What is difference between Osmosis and Diffusion?

 Osmosis is the movement of a solvent across a semi permeable membrane into a more dilute solution of the solvent.   The semi permeable membrane prevents the solute from passing through the membrane.    The original osmosis experiment used water and wine. Later experimenters found the same behavior using a sugar water solution instead of wine.    Various ….  Read More

Osmosis

After our papers on seed storage were rejected several times, we found that our design approach for seed storage warehouses was different from published works on the theory of osmosis.   We had several warehouses installed around the country.   All installations  are still working.   They are maintaining temperature and relative humidity at design conditions.    Either the ….  Read More

Water Purification

Water Purification Osmosis, the simple experiment of a column of wine capped at the bottom with a membrane from a pig’s bladder and immersed into a vessel of pure water has intrigued many for 200 years.  Although Priest Nollett expected that the column of wine would force flow downward through the membrane into the water, ….  Read More

Osmosis History

We recently requested a professional review for our book “Osmosis: The Molecular Theory”.      That was again an interesting experience.     We have had the opportunity to find reviewers who are incompetent or dishonest.  Sometimes it is difficult to spot the difference from a short conversation.  So,  we will review osmosis history once again.    Osmosis was discovered ….  Read More

Biological Osmosis

The osmosis experiment demonstrated that water flows uphill through a membrane from the pure water side into the wine. A large pressure applied to the wine stopped the flow of water into the wine.  Later experiments showed that a sugar water solution could replace the wine.  This led to Van’t Hoff’s theory for osmosis that ….  Read More

Vapor Pressure and Osmosis

HTMD Engineering was given the opportunity to design and build a cold storage facility for DeKalb Genetics for their hybrid seed corn.  The industry standard design conditions of 50°F and 50% relative humidity were selected, and we chose to insulate the facility with a closed cell spray on insulation which provided both good thermal insulation ….  Read More

My Tree Leaks

My Tree Leaks This year, I discovered that my maple tree leaks.   A wet spot appeared on the sidewalk near the base of the tree.   The weather was below freezing at night and warmer in the day. The tree trunk remained below freezing during the day.   As noted in the maple syrup discussion, we proposed: ….  Read More

Our Amazing Kidneys

We have proposed that osmosis is directly related to vapor pressure and that free vapor molecules exist in liquids and solids.  The quantity of these free molecules is in proportion to the vapor pressure value.   The net flow of free molecules through a porous membrane is the called osmosis.   Flow through porous membranes may also ….  Read More