Leaching is a mechanism for the release of nutrients from litter or senesced leaves that can drive interactions among plants, microbes, and soil. Although leaching is well established in conceptual models of litter decomposition, potential nutrient solubility of mineral elements from recently senesced litter has seldom been quantified. Using a standardized extraction (1:50 litter-to-water ratio...

1. The effect of iodination on the distribution of peptide hormones into the aqueous two-phase dextran-polyethylene glycol system and on the solubility of these hormones in aqueous polyethylene glycol and in water was assessed. Hormones that were studied included insulin, glucagon and parathyroid hormone. 2. The partition coefficient of native insulin in the dextran-polyethylene glycol system s...

Solvent exchange facilitates high-density nucleation of sessile nanodroplets or nanobubbles by successively wetting a surface with two solvents contrasting solubility respect to target species. Yet the key physical mechanisms underlying its efficacy have yet be theoretically explained. We develop minimal model for solvent exchange, prototypical example water and ethanol as nitrogen Our calculat...

The effect of ultrasound on the pseudo-solubility of nitrogen in water and on gas-liquid mass transfer kinetics has been investigated in an autoclave reactor equipped with a gas induced impeller. In order to use organic liquids and to investigate the effect of pressure, gas-liquid mass transfer coefficient was calculated from the evolution of autoclave pressure during gas absorption to avoid an...

Purpose: Lovastatin is poorly water soluble drug. It should be come into the BCS II drug. So oral bioavailability of lovastatin is less (50%). To develop novel dosage foam of the self-microemulsifying drug delivery systems (SMEDDS) for the lovastatin. Methods: Before the formulation of SMEDDS, solubility study was performed in different exicipients and select exicipients on basis of solubility ...

the thermal denaturation of adenosine deaminase (ada) has been investigated in the presence of sodium n-dodecyl sulphate (sds) over the temperature range of (293-363k) in 2.5 mm phosphate buffer, ph 6.4 by temperature scanning spectroscopy. the interaction of sds caused the folding of adenosine deaminanse resulting in a decrease of th (temperature of minimum solubility), ts (temperature of maxi...

Nitrogen K-edge spectra of aqueous triglycine were measured using liquid microjets, and the effects of Hofmeister-active salts on the spectra were observed. Spectra simulated using density functional theory, sampled from room temperature classical molecular dynamics trajectories, capture all major features in the measured spectra. The spectrum of triglycine in water is quite similar to that in ...

Alex Avdeef [1] and Samuel Yalkowsky [2] have independently studied the solubility and ionization properties of an investigational drug (NSC-639829). In the study conducted by Avdeef and coworkers, the pKa value derived from Henderson-Hasselbalch (HH) equation was 4.70, which was different from the value of 3.76 as determined experimentally by the Yasuda-Shedlovsky plot using the pKa values obt...

Cadmium sulfide particles were prepared by precipitation from acid solution. A radiotracer technique with 109Cd was applied tomeasure the solubili W of cadmium sulfide at various pH's. Filtration, centrifugation, ulttacentrifugation, and dialysis were used to separate the particles from the solution. Only the last two techniques proved to be successful. The solubility of cadmium sulfide in wate...