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Efficient conversion of carbon dioxide is of great interests to today's endeavors in controlling greenhouse gas emission. A multienzyme catalytic system that uses carbon dioxide and ethanol to produce L-lactate was demonstrated in this work, thereby providing a novel reaction route to convert bio-based ethanol to an important building block for synthesis(More)
Using the tight-binding model, we have studied the resonant-transport properties of the multiply connected ring systems threaded by magnetic flux F , and coupled to two electron reservoirs. For different flux F the electronic-energy spectrum and their corresponding total transmission probabilities of multiring systems have been calculated and compared. Some(More)
Acoustic band gaps can be opened and tuned by rotating square rods in two-dimensional liquid sonic crystals. For the systems of mercury rods with square cross section in a water host, the width of lowest gaps increases as the rotation angle of the square rods increases. But opposite results are found for the inverse systems of water rods in mercury, where(More)
An improved scattering matrix method is developed to study a two-dimensional air-rigid sonic crystal with open resonant cavity, and the band structure and transmission properties are investigated. Numerical results show that both the band structure and the transmission coefficient are sensitive to the shape of the resonant cavity. The relationship between(More)
The effective acoustic velocity along two highly symmetric directions of the first Brillouin zone is studied in a two-dimensional squarely arranged solid-solid phononic crystal. The relationship between the effective elastic velocity and the wave frequency of the two lowest bands is presented, which gives the same results as those obtained directly from the(More)
Point defect modes of acoustic wave in two-dimensional square arrays of square water rods in a mercury host were studied. The defects are created by three kinds of geometry, namely, square defect, circular defect, and rectangular defect, respectively. The results show that for both square defect and circular defect, the defect modes are only related to the(More)
CONTEXT Angiotensin-converting enzyme (ACE) is one of the main regulators of blood pressure through its action on the renin-angiotensin system. ACE inhibitory peptides from natural materials inhibit ACE activity and have considerable importance as antihypertensive agents. OBJECTIVE A new chromogenic reaction method for determining hippuric acid (HA) and(More)
An oleic acid-based epoxy monomer was synthesized by reacting 2-hydroxyethyl acrylate with epoxy stearic acid and an immobilized lipase. NMR, electrospray ionization mass spectrometry and gel permeation chromatography were used to characterize the intermediates and products. 2-(Acryloyloxy) ethyl epoxy stearate was synthesized with a yield of 87 % w/w.(More)