Membrane proteins within the sieve element-companion cell complex have essential roles in the physiological functioning of the phloem. The monoclonal antibody line RS6, selected from hybridomas raised against sieve elements isolated from California shield leaf (Streptanthus tortuosus; Brassicaceae) tissue cultures, recognizes an antigen in the Arabidopsis (Arabidopsis thaliana) ecotype Columbia...

Fine control of ultramicroporosity (<7 Å) in carbon molecular sieve (CMS) membranes is highly desirable for challenging gas separation processes. Here, a versatile approach proposed to fabricate hybrid CMS (HCMS) with unique textural properties as well tunable ultramicroporosity. The HCMS are formed by pyrolysis polymer nanocomposite precursor containing metal-organic frameworks (MOFs) carboniz...

Various approaches to solvent recovery have been studied for the manufacturing process of celecoxib, the active ingredient in Celebrex. A design case study has been performed by Rowan University with Pfizer through a green engineering partnership program. The manufacturing operation at Barceloneta, Puerto Rico was evaluated and several green engineering alternatives for the purification and rec...

Carbon-based membranes were manufactured by deposition of a polymeric precursor on asymmetric porous, ceramic substrates with tube channel geometry followed pyrolysis. As precursor, an unsaturated polyester resin prepared was used. The the carbon results first short substrate geometries (105 mm long single-channel tube), further scaling-up 19-channel (250 and 600 length) successfully performed....

Soybean (Glycine max cv. Bragg) petiolar tissue containing translocated (14)C-sucrose was quick frozen, freeze-substituted in acetone or propylene oxide and embedded in Epon. This procedure allowed cytological observations on sieve elements whose functional condition could be verified by microautoradiography. Sieve elements and companion cells were essentially free of ice damage. Aside from a P...