Oligomerization of β-lactoglobulin by microbial transglutaminase during high pressure treatment

High pressure treatment of solutions of #-lactoglobulin in the presence of microbial transglutaminase for 60 min at 40 °C resulted in an enzyme-induced oligomerization of the whey protein at pressures of 400 MPa and to a less extent at 600 MPa. The degree of crosslinking was lower when transglutaminase was added to solutions of #-lactoglobulin after high pressure treatment and no oligomerization was detectable when the protein was incubated with transglutaminase under atmospheric pressure. Thus, microbial transglutaminase in combination with high pressure treatment offers new perspectives for the modification of globular proteins, which usually are not affected by the enzyme under atmospheric conditions.     

Deep blue organic light-emitting diodes based on triphenylenes

We report about new easy-to-synthesize deep blue light-emitting organic materials. Various substituted low-molecular-weight triphenylene-derivatives have been prepared in a one-step procedure and are easily available on large scale and high purity. Furthermore, the synthesis of an oxetane functionalized, photo-crosslinkable triphenylene-based emitter material with enhanced film-forming properties is described. The low-molecular-weight emitters were vacuum-deposited, whereas the photo-crosslinkable emitter material derivative was processed from solution. The optical and electrical properties of the compounds were investigated. The corresponding photoluminescence emission spectra exhibit λ_max,ems values around 400 nm. Organic light-emitting multi layer devices were fabricated and characterized. OLED devices from these molecules emit deep blue light of 436–456 nm.     

Iterated Function Systems and Control Languages

Valuations—morphisms from (Σ*, ·, e) to ((0, ∞), ·, 1)—are a generalization of Bernoulli morphisms introduced by Eilenberg [“Automata, Languages, and Machines”, Academic Press, New York, 1974]. Here, we show how to generalize the notion of entropy (of a language) in order to obtain new formulas to determine the Hausdorff dimension of fractal sets (also in Euclidean spaces), especially defined via regular (ω-)languages. By doing this, we can sharpen and generalize earlier results in two ways: first, we treat the case where the underlying basic iterated function system contains noncontractive mappings and, second, we obtain results valid for nonregular languages as well.     

Polymer microvalve with pre-stressed membranes for tunable flow�Cpressure characteristics

A novel, inexpensive, polymer-based valve approach is presented that offers the combination of a check valve’s rectifying properties with the possibility to actively control the flow rate in the forward (open) direction. An elastic membrane with an incision is clamped between two rigid polymer plates and expands when pressure is applied in the forward direction allowing fluid to pass. In the backward direction, expansion of the membrane is not possible and flow is prevented. Varying the clamping force influences the expansion capability of the membrane due to its elasticity and thus enables control of the flow rate.     

LCOS显示器的复苏

技术进步和十年艰苦早就的制造专业技能正推进着Lcos显示器的复苏。     

Dye solar modules for facade applications: Recent results from project ColorSol

With respect to a first market introduction, one advantage of dye solar cell (DSC) modules is the combination of photovoltaic (PV) solar electricity with decorative aspects. We report on the recent results achieved in the frame of the German project ColorSol. The project focuses on the application field of building-integrated PVs (facades, PV-glazing, etc.). Design concepts, as well as scenarios for the application of the DSC technology in architecture and facade planning are developed and the application potential is quantified in cooperation with potential users. Prototypes of glass facade elements (70 cm×200 cm) have been developed which consist of several serially interconnected DSC modules each with a size of 30 cm×30 cm. The results of module characteristics under various outdoor illumination conditions and under partial shading are reported. Visual impressions of the DSC facade elements are presented.