摘要:
The present invention relates to a process for producing biodegradable polymeric materials including polyhydroxyalkanoates (PHAs) by using the cell debris left from PHA recovery and purification. The process comprises: (a) cultivating PHA-producing microbial cells in a medium solution containing an organic carbon source to form PHAs that are accumulated in the cells as inclusion bodies; (b) harvesting the cells from the spent medium and solubilizing the non-PHA cell mass to obtain a PHA solid and a cell debris solution; (c) separating the PHA solid from the cell debris solution; (d) feeding the cell debris solution to the cultivation step (a). By reusing the cell debris generated from PHA recovery, the invention avoids disposal of a large amount of aqueous waste. In addition, a remarkable increase of cell growth and PHA synthesis is achieved, because the cell debris can be readily assimilated by the microbial cells as the nutrients.
摘要:
A method of forming a semiconductor device is provided that includes forming a first metal semiconductor alloy on a semiconductor containing surface, forming a dielectric layer over the first metal semiconductor alloy, forming an opening in the dielectric layer to provide an exposed surface the first metal semiconductor alloy, and forming a second metal semiconductor alloy on the exposed surface of the first metal semiconductor alloy. In another embodiment, the method includes forming a gate structure on a channel region of a semiconductor substrate, forming a dielectric layer over at least a source region and a drain region, forming an opening in the dielectric layer to provide an exposed surface the semiconductor substrate, forming a first metal semiconductor alloy on the exposed surface of the semiconductor substrate, and forming a second metal semiconductor alloy on the first metal semiconductor alloy.
摘要:
A method of determining surface pore diameter distribution of a porous material is provided. A compressed gas is charged from backside of a sample of a porous body, a surface of the sample is immersed into a liquid wetting agent, and a gas pressure is regulated from high to low, such that pore mouths of the surface of the porous body are blocked by the wetting agent in an order from small to large pore sizes, and a gas flow rate is more rapidly decreased. When the pressure is decreased to a value, the gas flow rate is reduced to zero and the pressure at this time is corresponding to the largest pore mouth size of the surface of the porous body. The pore size distribution is determined by comparing the obtained gas pressure—flow rate curve (wet curve) with a gas pressure—flow rate curve (dry curve) obtained for the sample under a dry state. The pore size and the pore distribution are calculated based on the conventional bubble pressure method. The measurement of the surface pore distribution of the porous body is of great significance for investigating the support performance of the porous body.
摘要:
The present invention relates to a method to recover, purify and isolate polyhydroxyalkanoate (PHA) biopolymers from PHA-containing cell mass, which includes: (a) solubilizing the non-PHA cell mass in an acidic solution, leaving a suspension of partially crystallized PHA granules; (b) adjusting the pH of the suspension to 7-11 and separating the PHA solids from the dissolved non-PHA cellular mass; (c) re-suspending the PHA solids in a bleaching solution for decolorization; and (d) drying the resulting PHA solids. About 95% or greater of original PHA in cell mass is recovered, and the purity of PHA solids is about 97% or above. The weight average molecular mass of the purified biopolyesters is about 500 kDa or greater.
摘要:
Electrospinning of materials that are difficult or impossible to process into nanofibers by conventional fiber-forming techniques or by electrospinning are prepared by an electrospinning procedure which uses an electrospinnable outer “shell” fluid around an inner “core” fluid, which may or may not be electrospinnable, to form nanofibers of the inner core fluid having a core/shell morphology. The resulting shell around the nanofiber can remain in place or be removed during post-processing with the core of the fiber remaining intact. The dual-fluid electrospinning process can produce core fibers having diameters less than 100 nm, insulated nanowires, as well as tough, bio-compatible silk fibers. Alternatively, the core can be removed leaving a hollow fiber of the shell fluid.
摘要:
Apparatus and method for microcontroller debugging. A preferred embodiment microcontroller integrated circuit comprises debug circuitry on the integrated circuit. The debug circuitry is capable of breaking normal instruction execution based on an address breakpoint, a stack pointer breakpoint, or a single step breakpoint. Upon detection of a valid breakpoint, the debug circuitry substitutes a jump to a debug program instruction in place of the next normal application program instruction. The debug program then may provide microcontroller status to a developer, allowing the developer to debug the application program. Upon completion of the debug program, control of the microcontroller is returned to the application program at the point of interruption.
摘要:
Methods and apparatus for supplying unbound applications with data via in-band program channel signaling are described. Unbound applications are STB or other customer premise device applications which continue to run when a tuner in the device changes between program channels. Applications executed in a STB, in accordance with the present invention, e.g., eBIF applications, continue to run despite changes in program channels with data being supplied via in-band signaling, out of band signaling, or a combination of in-band and out of band signaling. The methods and apparatus are well suited for supporting delivery of program catalog information relevant to an individual program channel using in-band signaling reducing or eliminating the need to delivery a multi-channel program catalog via out of band signaling to support various VOD applications.
摘要:
Methods of forming an electrically programmable fuse (e-fuse) structure and the e-fuse structure are disclosed. Various embodiments of forming the e-fuse structure include: forming a dummy poly gate structure to contact a surface of a silicon structure, the dummy poly gate structure extending only a part of a length of the silicon structure; and converting an unobstructed portion of the surface of the silicon structure to silicide to form a thinned strip of the silicide between two end regions.
摘要:
Techniques disclosed herein include systems and methods for transmitting TV program related content to IP connected devices on a home network, or other local area network. Users can watch television while simultaneously receiving content related to TV programs currently being displayed on a television. TV centric and TV program related content can be transmitted to IP connected devices. Moreover, this TV program related content can be displayed at the same time as a television program is being displayed on a television. As such, the system can provide media synchronization within home network using the set-top box as a gateway for delivering the content. Users can watch TV at home, and at the same time receive TV program related content on a laptop, tablet computer, mobile phone, etc.
摘要:
Techniques disclosed herein include systems and methods for transmitting TV program related content to IP connected devices on a home network, or other local area network. Users can watch television while simultaneously receiving content related to TV programs currently being displayed on a television. TV centric and TV program related content can be transmitted to IP connected devices. Moreover, this TV program related content can be displayed at the same time as a television program is being displayed on a television. As such, the system can provide media synchronization within home network using the set-top box as a gateway for delivering the content. Users can watch TV at home, and at the same time receive TV program related content on a laptop, tablet computer, mobile phone, etc.