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Westborough, US
Community Advocate
Home Featured News Demolition permit denied for 'Blueberry Lady's' home
Westborough Newsletter
Demolition permit denied for 'Blueberry Lady's' home
Community Advocate Staff
Historical Commission instead approves six month delay
The home located at 140 South St.
By Bonnie Adams, Managing Editor
Westborough – A representative of Kendall Homes, Inc., was admonished by local residents and members of the Historical Commission during a public hearing held June 21 when he requested a demolition permit for a home located at 140 South St.
Tim Black, a manager for the Southborough-based company, said "due diligence" had been done to find a buyer to purchase and remove the circa -1725 home off the property that had last been owned by Lillian Grove, fondly known as Westborough's "Blueberry Lady". She had lived at the site, known as Denny Brook Farm, for 63 years, prior to her passing earlier this year.
Black told the historical commission that since his company was unable to find a buyer, they were requesting a demolition permit so that they could develop the property into a 2 lot subdivision. He added that it would be "too costly and too dangerous" to attempt to renovate the house in its current state.
Several residents then commented, disputing Black's account, adding that they had attended a recent estate sale at the property.
Paula Skog, who now lives in North Grafton but was a Westborough resident for many years, said "there is a lot of rich history in this house. I was at the estate sale – its in excellent condition."
Tina Baxter said that she grew up across from the farm. At the estate sale, she said she noted that "everything was immaculate."
"There is no reason to demolish this property," she said.
Her father, Donald Parker Jr. added, "You cannot tear this house down, you cannot tear this down. If Lillian was here, she would be [angry]. This is just a money grab."
Several other residents commented as well, noting that they did not want to see another old home in Westborough taken down.
"I am not the bad guy here. I'm just a businessman," Black responded. "But this house is not safe – it's a fire hazard waiting to happen."
But, he admitted to the commission, that Kendall Homes had not yet attempted to sell the home – just to have it bought and moved off the property.
"That's ludicrous, to want to demolish a building without even trying to save it first," commission member Jennifer Doherty said.
The rest of the commission agreed with her, and instead of issuing the permit, approved instead a six month demolition delay.
Hazel Nourse, the commission's chair, advised Black to contact some local Realtors.
"I believe there will be a lot of people interested in this property," she added.
The late Lillian Isabelle Grove
Photo/submitted
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Immunization with recombinant beta-tubulin from Trypanosoma evansi induced protection against T. evansi, T. equiperdum and T. b.brucei infection in mice
Li, S-Q, Fung, M-C, Reid, S.A., Inoue, N. and Lun, Z-R (2007) Immunization with recombinant beta-tubulin from Trypanosoma evansi induced protection against T. evansi, T. equiperdum and T. b.brucei infection in mice. Parasite Immunology, 29 (4). pp. 191-199.
Link to Published Version: http://dx.doi.org/10.1111/j.1365-3024.2006.00933.x
The beta-tubulin gene of Trypanosoma evansi (STIB 806) was cloned and expressed in Escherichia coli. The predicted amino acid sequence of T. evansi beta-tubulin shows 100%, 99·8%, 99·1%, and 98·6% homology with T. equiperdum, T. b. brucei, T. cruzi and T. danilewskyi, respectively, but is diverse from that of T. cyclops, showing only 51·6% of homology. Recombinant beta-tubulin was expressed as inclusion bodies in E. coli. It was purified and renatured for immunological studies. Mice immunized with the renatured recombinant beta-tubulin were protected from lethal challenge with T. evansi STIB 806, T. equiperdum STIB 818 and T. b. brucei STIB 940, showing 83·3%, 70% and 76·7% protection, respectively. Serum collected from the rabbit immunized with recombinant beta-tubulin inhibited the growth of T. evansi, T. equiperdum and T. b. brucei in vitro. Serum from mice and rabbits immunized with recombinant beta-tubulin recognized only T. evansi beta-tubulin and not mouse beta-tubulin. The results of this study demonstrated that the recombinant T. evansi beta-tubulin is a potential candidate for the development of a vaccine to prevent animal trypanosomiasis caused by these three trypanosome species.
Murdoch Affiliation(s):
School of Veterinary and Biomedical Sciences
Blackwell Publishing Inc.
© 2007 The Authors.
http://researchrepository.murdoch.edu.au/id/eprint/3423

redpajama_set_name: RedPajamaCommonCrawl


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10/6/2017 | 3 MINUTE READ
Real-Time, High-Res Monitoring of Structural Defects in Metal AM
A team at Argonne National Laboratory has, for the first time, captured below-surface measurements of laser-metal reactions.
Fig. 1: In this still X-ray image, the laser power is set to 340 W. The laser beam size is ~220 microns (1/e2). The powder particle size is in the range of 5 to 45 microns, and the powder layer thickness is ~100 microns. The numbers indicate the time nodes. The raw data were taken with a frame rate of 50 kHz. The exposure time for each individual image is 350 ns. All the scale bars are 200 microns.
Fig. 2: Here the laser power is 520 W. The laser beam size is ~220 microns (1/e2). The powder particle size is in the range of 5 to 45 microns, and the powder layer thickness is ~100 microns. The numbers indicate the time nodes. The raw data were taken with a frame rate of 50 kHz. The exposure time for each individual image is 350 ns. All the scale bars are 200 microns.
Fig. 3: Setup of the high-speed X-ray experiment on laser powder-bed fusion process at beamline 32-ID-B beamline of the Advanced Photon Source.
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Enter the U.S. Department of Energy's Argonne National Laboratory, which, with assistance from Carnegie Mellon University and Missouri University of Science and Technology, has accomplished precisely that. Using a synchrotron beamline—one of only three in the entire world—a team was able to record the laser-metal interaction with a high-speed X-ray instrument located at the Advanced Photon Source, a DOE Office of Science user facility located at Argonne. The resulting video resolution, captured at an astounding 50,000 frames per second, allows the scientists to study the formation of a given material's microstructure—including pores and other defects—frame by meticulous frame.
Dr. Tao Sun, lead author of the published research about the work and a physicist with the imaging group in the X-ray science division at Argonne, says that without this kind of granular understanding, we'll never be able to realize metal AM's full potential. "The quantitative sample structure information we can obtain from these experiments is helping us better understand the physics underpinning the formation of different defects," he says, "and also helping build high-fidelity models to guide the process optimization for manufacturing parts with different geometries and dimensions."
In Figures 1 and 2 above, you can see the dramatic differences that resulted from adjustments to the laser power conditions during Argonne's experiments. Both image series were taken with the same frame rate, as well as the same exposure time: 350 nanoseconds per individual image. In Figure 1, the laser power was set at 340 watts, while in Figure 2 the power was increased to 520 watts. As outlined in the research, the differences are immediate and drastic. Using 520 watts of power, "the laser-metal interaction is much more violent than the previous case. The Ti-6Al-4V powders and base are quickly melted locally. The continuous laser heating causes large cavity depth and strong oscillation behavior, and the molten metal spreads outwards from the surface with a portion getting ejected away." For the first time ever, the team was able to directly observe and experimentally measure pore formation at the bottom of a melt pool, deep inside the base.
Other direct observations from the research include "strong metal vapor evaporation around the laser beam," which result in melt ejections greater than when the laser power is set to 340 watts. The team believes that its findings and the processes behind them—which they plan to share with other researchers interested in building prediction models for 3D-printed materials—open the doors not only to new dimensions of research and development in additive manufacturing, but also other laser processing and traditional manufacturing techniques, such as welding. Only through a precise ability to measure and control the mechanical properties of additively manufactured products will the technology truly flourish, Sun says. "Given that the precise control of the microstructure and dimension of parts is the major barrier that hinders laser AM techniques from reaching their full potential, the experiment tool we developed and its utilization by other scientists could potentially accelerate the coming of the AM age."
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