The photorefractive properties of semi-insulating AlGaAs-GaAs multiple quantum wells are described for the transverse Franz-Keldysh geometry with the electric field in the plane of the quantum wells. Combining the strong electroabsorption of quantum-confined excitons with the high resistivity of semi-insulating quantum wells yields large nonlinear optical sensitivities. The photorefractive quan...

I t was my pleasure to serve as chairman of the 26th annual competition for the Franz Edelman Award for Management Science Achievement. The competition is sponsored jointly by INFORMS and its practice section, the College for the Practice of the Management Sciences (CPMS). The primary purpose of the competition is to recognize outstanding accomplishments in the practice of our profession. The p...

The Electronic Encyclopedia Exploratorium (E 3 ) is a vision of a future computer system|a kind of electronic \How Things Work" book. Typical articles in E 3 will describe such mechanisms as compression refrigerators, engines, telescopes, and mechanical linkages. Each article will provide simulations, 3-dimensional animated graphics that the user can manipulate, laboratory areas that allow a us...

The drug diffusion of most compounds, particularly hydrophilic molecules through the skin is limited by the permeation of the outermost cell layers of the epidermis, the stratum corneum(SC). For this reason it is of interest to characterize drug diffusion processes through this skin layer. A new FTIR-ATR cell was developed for non-invasive real time measurements of drug diffusion. The diffusion...

The aim of the following research was to formulate benzyl benzoate in emulgel form and to evaluate the release of the medicament from it. Emulgel containing 25% w/w of benzyl benzoate was prepared by addition of a gelling agent; Carbopol 934 to an emulsion using Span 80 as emulsifying agent. The release of benzyl benzoate was determined by Franz diffusion cell using cellulose acetate membrane f...

Nasal solutions of almotriptan malate were prepared in phosphate buffer containing different proportions of HPMC E15. In vitro permeation studies were performed using Franz diffusion cell with dialysis membrane and ex vivo permeation studies were carried out using sheep nasal mucosal layer. The formulations were radiolabeled with 99mTc and the nasal residence time was studied in rabbits. Nasal ...

Transdermal diffusion studies of a polyherbal ointment were carried out in vito using franz- Diffusion cell and microbial one inhibition diameter as drug release monitoring parameters. Out of the three ointment base prepared, (Hydrocarbon Base (HB), surfactant Base (SB), Surfactant Base + (Penetration Enhancer (10 % DMSO) SBPE), we observed that SBPE possesses maximum drug release capacity, as ...

The main objective of this paper was to manipulate the Nano Fibrous Scaffold "NFS" surface roughness to achieve a new transdermal drug release profile. To assess the intrinsic mechanical properties of Nylon 6 or polycaprolactam, such as its proper resiliency, it was considered as the matrix. Cetirizine was used as a drug model and was loaded (1% w/v) to polymer solution (30%w/v) before spinning...

The main objective of this paper was to manipulate the Nano Fibrous Scaffold "NFS" surface roughness to achieve a new transdermal drug release profile. To assess the intrinsic mechanical properties of Nylon 6 or polycaprolactam, such as its proper resiliency, it was considered as the matrix. Cetirizine was used as a drug model and was loaded (1% w/v) to polymer solution (30%w/v) before spinning...