Abstract:
The invention relates to novel urea and guanidinium derivatives of deoxynojirimycin and related iminosugars, wherein the ring nitrogen in the iminosugars is derivatised, methods for the preparation urea and guanidinium derivatives of deoxynojirimycin, (protected) intermediates and the use of the urea and guanidinium derivatives of deoxynojirimycin in the modification of the activity of glycosidases and their use as a pharmaceutical. Where in is a 5, 6, 7 or 8-membered (saturated) nitrogen-containing cyclic compound; wherein X is O or NR7; wherein R1 is H or a straight or branched alkyl, cycloalkyl, alkenyl, alkynyl, alkoxyalkyl or aminoalkyl containing 1 -20 carbon atoms, an aryl, alkylaryl, heteroaryl, heteroalkyl, alkoxy(het)aryl containing 5-12 ring atoms, wherein R1 is optionally substituted with one o more -OH, -COOH, -CI, -F, -CF3, -OCF3, -O-C(=O)N-(alkyl)2; wherein R2 is H or a straight or branched alkyl, cycloalkyl, alkenyl, alkynyl, alkoxyalkyl or aminoalkyl containing 1 -12 carbon atoms, an aryl, alkylaryl, heteroaryl, heteroalkyl, alkoxy(het)aryl containing 5-12 ring atoms, wherein R1 is optionally substituted with one o more -OH, -COOH, -CI, -F, -CF3, -OCF3, -O-C(=O)N-(alkyl)2; wherein R3, R4, R5, R6 are independently H or a hydroxyl protecting group, wherein R7 is H, C1-C6 alkyl;
Abstract:
A photothermal system for performing high throughput single particle detection, the system comprising: a first optical path for directing a probe laser beam (PB) and a heating laser beam (MHB) towards a target or sample area (62); and a second optical path for directing the probe laser beam from the sample to a detector for detecting phase changes (?F) induced in the probe beam (PB) by the photothermal effect due to local heating of the sample by the heating beam (MHB), wherein the first optical path includes one or more optical elements (60a, 60b) arranged to define a detection volume of more than 10 femtolitres.
Abstract:
A first aspect of the invention relates to a luminescent object comprising an aligned polymer that contains an oriented photoluminescent material, said aligned polymer having a pretilt angle of 10-90º. The luminescent object according to the present invention may advantageously be employed in luminescent solar concentrator systems as it enables highly efficient transportation of radiation emitted by the photoluminescent material following exposure to incident solar light. Another aspect of the invention concerns a photovoltaic device comprising an electromagnetic radiation collection medium containing the aforementioned luminescent object and a photovoltaic cell capable of converting optical radiation to electrical energy which is optically coupled to the luminescent object. Further aspects of the invention include a fluorescent light activated display and a room lighting system comprising the aforementioned luminescent object.
Abstract:
A first aspect of the invention relates to a luminescent object comprising: a. a luminescent layer or core containing a photoluminescent material; and b. a wavelength-selective mirror; wherein the luminescent layer or luminescent core is optically coupled to the wavelength-selective mirror, said wavelength-selective mirror being at least 50% transparent to light absorbed by the photoluminescent material and at least 50% reflective to radiation that is emitted by the photoluminescent material. The luminescent object according to the present invention may advantageously be employed in luminescent solar concentrator systems as it enables highly efficient transportation of radiation emitted by the photoluminescent material fo llowing exposure to incident solar light. Another aspect of the invention concerns a photovoltaic device comprising an electromagnetic radiation collection medium containing the aforementioned luminescent object and a photovoltaic cell capable of converting optical radiation to electrical energy which is optically coupled to the luminescent object. Further aspects of the invention include a fluorescent light activated display and a room lighting system comprising the aforementioned luminescent object.
Abstract:
The present invention relates to necrosis and ethylene inducing proteins from Botrytis species and their use. Provided are also methods for determining the susceptibility of a plant's tissue to a necrosis and ethylene inducing protein and methods for selecting plants being resistant to one or more of these proteins and to Botrytis infection.
Abstract:
The invention relates to a method for inputting an information signal into a power cable which is connected to a voltage supply and which comprises at least one or more conductors, a dielectric provided around the conductors and a conductive earth sheath arranged wholly or partially around the dielectric, the method comprising of inputting a pulse-like information signal at a first position via the earth sheath in order to produce a corresponding pulse-like information signal which is propagated to a second position in the dielectric of the power cable.
Abstract:
The present invention relates to a device suitable for measuring the viscosity of a fluid, which device comprises on all sides surrounded channels, and a membrane suitably connected to the channels for differential pressure measurement. According to the invention, the first channel is located in a first plane and the secondchannel in a second plane, which first plane and second plane are oriented substantially parallel in relation to each other, and the membrane is located in a plane substantially parallel to the first plane. This facilitates the device to be filled with liquid without the danger of the retention of air bubbles. The device can be used as an independent viscosity meter, but may also be integrated with one or more separation techniques for particles and (polymer) molecules.
Abstract:
Method for designing a sound-absorbent wall (1) having cavity structures, wherein each cavity structure comprises a primary cavity (2) in a sound-absorbent surface (8) of the wall (1). The method comprises the steps for determination of an absorption spectrum of the sound-absorbent wall (1) as a function of design parameters, which, for each cavity structure, consist of a surface porosity OMEGA of the sound-absorbent surface (8), the primary length of the primary cavity (2) and the primary crosssection of the primary cavity (2), variation of at least one of the design parameters and selection of values of the design parameters where the absorption spectrum meets a desired absorption spectrum. In one embodiment, by means of which the absorption spectrum becomes more broadband, each cavity structure further comprises a secondary cavity (3) and the design parameters further comprise the secondary length of the secondary cavity (3) and the secondary crosssection of the secondary cavity (3).
Abstract:
Ground penetrating radar system for detecting objects (17) on or below a ground surface (18), comprising at least one transmit antenna (13) having a first foot print (14) at the ground surface, at least one receive antenna (15) having a second foot print (16) at the ground surface, and processing means (11, 12) connected to the at least one transmit antenna (13) and the at least one receive antenna (15), in which the first (14) and second (16) foot print have different dimensions. The transmit antenna (13) and receive antenna (15) are adapted to improve the detection capability of the ground penetrating radar system (10).