摘要:
Methods of forming polymeric articles using plasma treated polymer resins, and orthopedic implants comprising a polymeric article wherein the polymeric article has reactive groups bonded to polymer molecules in an interior region of the polymeric article.
摘要:
Various embodiments of optical fiber designs and fabrication processes for ultra small core fibers (USCF) are disclosed. In some embodiments, the USCF includes a core that is at least partially surrounded by a region comprising first features. The USCF further includes a second region at least partially surrounding the first region. The second region includes second features. In an embodiment, the first features are smaller than the second features, and the second features have a filling fraction greater than about 90 percent. The first features and/or the second features may include air holes. Embodiments of the USCF may provide dispersion tailoring. Embodiments of the USCF may be used with nonlinear optical devices configured to provide, for example, a frequency comb or a supercontinuum.
摘要:
This invention provides water-swellable articles and hydrogels that contain a hydrophilic polymer and perfluorocyclobutane crosslinking segments. The perfluorocyclobutane crosslinking segments are covalently attached to the polymeric chains of the hydrophilic polymer so that the crosslinking segments chemically link the polymeric chains to each other. The present invention also provides a method of making a crosslinked hydrogel by first attaching one or more substituted aromatic trifluorovinyl or aromatic trifluorovinyl ether moieties to a hydrophilic polymer to form a modified polymer and then heating the modified polymer at an elevated temperature to form perfluorocyclobutane segments from the trifluorovinyl or trifluorovinyl ether moieties. These water-swellable articles and hydrogels may be used in biomedical and pharmaceutical applications and may be suitable for implanted joint repair materials such as an articulating or bearing surface in a hip, knee, spine, finger, ankle, elbow, wrist, or shoulder joint.
摘要:
Disclosed is a three-layer protective enclosure that provides resistance to water, dust, dirt, and bump protection for sensitive computers. In one embodiment, an inner membrane layer is provided, which is a thin, flexible layer that protects portions of a computer and allows the user to interact with keyboards, push buttons and other interactive features of the computer. A protective hard shell fits tightly over the membrane and provides additional sealing and rigidity to the protective enclosure. A stretchable cushion layer is placed over the hard shell which conforms to the hard shell and seals moisture, dust and dirt from entering the hard shell. The stretchable cushion layer provides cushioning and also allows access to certain controls on the computer. In another embodiment, a touch screen cover may be used with, or without, a membrane over other portions of the computer.
摘要:
The invention provides a multi-polymer hydrogel article having a first polymeric, water-swellable material and a second polymeric material, organized such that a first region substantially comprises the first polymeric, water-swellable material, a second region adjacent the first region comprises a mixture of the first polymeric, water-swellable material and the second polymeric material, and a third region adjacent the second region substantially comprises the second polymeric material. The article exhibits an increasing concentration gradient of the second polymeric material moving from the first region, through the second region, to the third region. The invention also provides methods for forming a multi-polymer hydrogel article by (a) forming a hydrogel structure using a first polymeric, water-swellable material, (b) creating an aerogel structure having a plurality of open pores by dehydrating the hydrogel structure, (c) contacting the aerogel structure with a second polymeric material to incorporate the second polymeric material into at least a portion of the plurality of open pores to form the multi-polymer hydrogel article, and (d) rehydrating the multi-polymer hydrogel article.
摘要:
The method and system of the present invention provides an improved technique for replacing, implementing and managing computer-related assets. A technician accesses the World Wide Web through a user's computer. The information resident on the computer, including information regarding the computer and the user's preferences, are downloaded to a remote storage medium through the World Wide Web. Once downloaded, all information may be removed from the user's computer. Subsequently, the technician accesses another computer such as, for example, a new computer that has been assigned to the same user. The technician accesses the World Wide Web through the new computer and downloads the information previously stored on the remote storage medium. This information can then be used to install the user's prior applications, settings and preferences on the new computer.
摘要:
The present invention provides hydrogel coated, implantable medical devices and methods of coating hydrogels onto implantable medical devices. In one embodiment, a hydrogel coated medical device is formed by physically treating a surface of the medical device, chemically treating the surface, applying a hydrogel precursor and then crosslinking the hydrogel precursor to form a hydrogel coating on the surface of the medical device. The present invention may be particularly applicable for coating articulating surfaces on implantable medical devices such as artificial joints.
摘要:
This invention provides methods and processes to attach or bond hydrogels to suitable surfaces using irradiation techniques and also provides methods and processes to create crosslinked regions in hydrogel articles using these irradiation techniques. Specifically, lasers at wavelengths tuned to the irradiation absorption bands of hydroxyl groups, carboxylic acid groups or water may be used to attach or bond hydrogels to surfaces such as soft tissue and hydrogel surfaces or to crosslink regions in hydrogel articles.
摘要:
A wrapped article (20) includes a personal care absorbent personal care article (22), and a separately provided wrap member (24) which operatively encloses the absorbent personal care article (22). At least a major portion of the wrap member (24) includes an outer layer (26), an inner layer (28) and an intermediate layer (30) that is sandwiched between the inner and outer layers, and includes an operative amount of an odor control agent (32). In particular aspects, the intermediate layer (30) can include a nonwoven fibrous web, and the fibrous web can have selected fiber sizes. In another aspect, the intermediate layer (30) of the wrap member (24) can include a meltblown nonwoven web. In further aspects, the outer layer (26) can include a nonwoven fibrous web having particular fiber sizes, and the inner layer (28) can include another nonwoven fibrous web having the same or different fiber sizes.