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The specialty materials company Rohm and Haas has recently shown its commitment to meet the needs of regional markets with information technology and culturally relevant to carry out its first online seminar on rheology modifiers of Rohm and Haas oriented to the Russian market.

The specialty materials company Rohm and Haas has recently shown its commitment to meet the needs of regional markets with information technology and culturally relevant to carry out its first online seminar on rheology modifiers of Rohm and Haas oriented to the Russian market.

This thesis introduces a new technique—scanning activity gravimetric analysis (SAGA)—for investigating phase transitions in semicrystalline polymers. Isothermal growth and dissolution of polymer crystallites within picogram to milligram samples are manifested by mass changes in response to changes in the activity of sorbed solvent vapor. Single charged particles are levitated and weighed in an electrostatic field, providing access to highly supersaturated states. Phase transitions are inferred from simultaneous equilibrium sorption and light scattering measurements. Analogous to differential scanning calorimetry, scanning solvent activity up and down exposes broad transitions between the semicrystalline solid state and the dissolved state, which are influenced by sample history. We demonstrate dissolution and crystallization of nanogram samples of polyethylene oxide by controlling the activity of sorbed water vapor and observe self-nucleation of crystallites from partially states and fully dissolved states.

This thesis introduces a new technique—scanning activity gravimetric analysis (SAGA)—for investigating phase transitions in semicrystalline polymers. Isothermal growth and dissolution of polymer crystallites within picogram to milligram samples are manifested by mass changes in response to changes in the activity of sorbed solvent vapor. Single charged particles are levitated and weighed in an electrostatic field, providing access to highly supersaturated states. Phase transitions are inferred from simultaneous equilibrium sorption and light scattering measurements. Analogous to differential scanning calorimetry, scanning solvent activity up and down exposes broad transitions between the semicrystalline solid state and the dissolved state, which are influenced by sample history. We demonstrate dissolution and crystallization of nanogram samples of polyethylene oxide by controlling the activity of sorbed water vapor and observe self-nucleation of crystallites from partially states and fully dissolved states.

Amira Pharmaceuticals, Inc. announced it will present preclinical data on its program of LPA1 receptor antagonist on June 30, 2009 in the summer research conference of the Federation of American Societies for Experimental Biology (FASEB) held in Carefree, Arizona.

The LPA1 receptor is part of the phosphatidic acid path / lisofosfatidilcolina, which among other things is associated with the communication from cell to cell. In recent studies, it has been shown to play a role in fibrotic disease, particularly idiopathic pulmonary fibrosis (IPF).

Amira Pharmaceuticals, Inc. announced it will present preclinical data on its program of LPA1 receptor antagonist on June 30, 2009 in the summer research conference of the Federation of American Societies for Experimental Biology (FASEB) held in Carefree, Arizona.

The LPA1 receptor is part of the phosphatidic acid path / lisofosfatidilcolina, which among other things is associated with the communication from cell to cell. In recent studies, it has been shown to play a role in fibrotic disease, particularly idiopathic pulmonary fibrosis (IPF).