摘要:
Achieving high conversion of large multiply charged biological ions into low charge states involves requirements difficult to reconcile when high transmission and good spray quality (resulting in narrow mobility distributions) are sought. These multiple goals are achieved in this invention by partially isolating different regions from each other with electrostatic barriers relatively transparent to ions, such as metallic grids. One such region requires high electric fields for ion generation. The other region, used for ion recombination, is approximately field-free. In an alternative arrangement intended for charge reduction in sub-millisecond times, two sources of ions with opposite polarities are placed contiguously, with a grid in between. In all cases, ion crossing through grids into field free regions is effectively driven by space charge.
摘要:
Improvements are provided in the detection of atmospheric vapors by ionizing them near ambient pressure, and analyzing them as ions. Lowest detection limits of parts per quadrillion (ppq) concentrations are enabled by a combination of improvements, including the use of a filter to remove occasional intense signal from explosive particles. Several sources of chemical background are identified and solutions for their reduction or elimination are presented. Gains in response time may be achieved by operating at elevated temperature. When the ionizer is an electrospray source, the use of high boiling point solvents is indicated. An increased selectivity is achieved by operating a differential mobility analyzer (DMA) in series with a mass spectrometer. However, ppq sensitivities require various improvements in the DMA system including a special coupling to the ionizer, controlling the temperature in the DMA pump circuit, avoidance of induction on the DMA electrodes from heating devices, etc.
摘要:
A machine-controlled method may include creating a tile profile including multiple tiles, visually presenting the tile profile using a display, and storing the tile profile. The method may further include adding, removing, and editing the tiles and utilizing tile stacks. The method may further include any of a number of tile scrolling mechanisms.
摘要:
A chair having a seat, a first support base and an upright elongated support element. The upright elongated support element has a first point and a second point, with the first point connecting to the seat and the second point connecting to the first support base. The first support base is bolstered by a resilient component since the resilient component is disposed beneath the first support base. The resilient component is capable of providing cushioning to the first support base is also capable of providing a full axial rotation to said upright elongated support element.
摘要:
A protection device for the outside of a vehicle is described. An impact absorbing structure is placed on the outside of a vehicle and is anchored to the vehicle using a strap. The strap is secured between the doorframe and the roof of the vehicle and allows the impact absorbing structure to hang horizontally along the outside of the vehicle. Any object that would otherwise impact and damage the vehicle, such as the door of a neighboring car in a parking lot, is intercepted by the protection device.
摘要:
A machine-controlled method may include creating a tile profile including multiple tiles, visually presenting the tile profile using a display, and storing the tile profile. The method may further include adding, removing, and editing the tiles and utilizing tile stacks. The method may further include any of a number of tile scrolling mechanisms.
摘要:
The invention is a hand held nail and foot groomer for people, which includes a spherical nail groomer body having at least one compartment for batteries and tips; a semi-spherical tip cover assembly having an opening, being in substantial contact to the nail groomer body and being movably connected to the nail groomer body; a combination battery, motor and tip compartment; a tip assembly for attachment of various shapes and sizes of nail files and brushes. The preferred embodiment of this invention is one in which the nail body optionally includes a flat bottom section which includes one or more detachable ringed or recessed sections, said ring sections or recessed sections capable of holding rounded and optionally recessed files and/or pumice stones and/emery files and/or foot scarpers useful in grooming feet.
摘要:
The agility device is an article of manufacture comprising a base, a stabilized inflatable support disposed on the base, and a top platform positioned on the stabilized inflatable support. The device also has optional handles and expandable base supports for added stability. The device is primarily for use as an exercise device, but also has value as an agility training tool to help users improve their balance and agility, and to improve their reflexes. It is useful for exercise, physical therapy, and for entertainment.
摘要:
A method for fast and accurate recognition of species contained in trace amounts in complex mixtures such as ambient air or biological fluids is taught based on the use in tandem of one or several differential mobility analyzers (DMAs) and possibly also a mass spectrometer (MS), all arranged in series. The two DMAs operate in different regions of the ion drag versus drift velocity curve (for instance, linear versus nonlinear regions), hence separating according to more than one independently discriminating parameters of the ion. Very high discrimination can be achieved even with a single stage of mass spectrometric separation by selecting a narrow range of ions with the DMA, and analyzing them in the MS, first without fragmentation, and then with fragmentation. This process does not require necessarily a tandem MS when fragmentation takes place in the inlet region of the MS. Fast and accurate discrimination is possible in single ion monitoring mode (SIM) for a large number of targeted species, even with relatively inexpensive and light single quadrupole MS systems, where the various filters placed in series would open pre-configured narrow windows suitable for passage of each ion in a list.
摘要:
A device and method for stretching, toning and strengthening the chest, shoulder, neck and upper back muscles of a patient thereby relieving pain and improving posture. Typically the patient is suffering from tension related muscle problems. The device and method are used to facilitate therapeutic treatment of the muscle problems by progressively stretching the muscles and thereby relieving the muscle problems.