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- 저자 : Broach, Robyn B. (검색결과 4 건)
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Crystallization Mechanism of Zeolite UZM-5
Park, Min Bum,Ahn, Nak Ho,Broach, Robert W.,Nicholas, Christopher P.,Lewis, Gregory J.,Hong, Suk Bong American Chemical Society 2015 Chemistry of materials Vol.27 No.5
<P>A reliable formation pathway for UZM-5 zeolite crystals in the presence of tetraethylammonium, tetramethylammonium, and Na<SUP>+</SUP> ions at 150 °C has been proposed based on the <SUP>13</SUP>C MAS NMR and IR spectra of a series of solid products recovered as a function of time during the crystallization process, as well as on the crystal structure of as-made UZM-5 determined using synchrotron powder X-ray diffraction and Rietveld analyses. The nucleation of this cage-based small-pore zeolite begins with the construction of the largest 26-hedral <I>lta</I>-cages among its four different structural units. The next step is the attachment of 14-hedral <I>wbc</I>-cages to the preorganized <I>lta</I>-cage at shared 6-rings in an appropriate orientation that will allow the growth of two <I>wbc</I>-cage layers linked by 8-hedral <I>rth</I>-cage formation along both <I>a</I> and <I>b</I> axes. The resulting interlayer space is readily converted to a layer of <I>lta</I>-cages by interconnecting two opposing <I>wbc</I>-cages, with the concomitant formation of interlayer <I>d4r</I>-cages and 8-rings. Over the outer surface of the resulting UZM-5 nuclei, which resembles one-half of an <I>lta</I>-cage, the crystal growth may take place in a self-assembled manner as described above.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2015/cmatex.2015.27.issue-5/cm504079m/production/images/medium/cm-2014-04079m_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/cm504079m'>ACS Electronic Supporting Info</A></P>
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John W McCarthy,Jamie A Broach,Joann P Benigno 한국언어재활사협회 2016 Clinical Archives of Communication Disorders Vol.1 No.1
Seven preschool children (M age=3;11; range=2;10–5;7) with autism or related pragmatic difficulties participated in two structured interactions with an AAC system. In the aligned interaction, the system was placed at the chest level of the experimenter with the actual book to the side. In the divided interaction, the system was placed to one side of the experimenter and the book was placed to the other side. Based on states of joint attention (JA) engagement during the AAC interactions, two subgroups emerged: beginning coordinators and active coordinators. JA engagement states with the caregiver, performance on the Early Social Communication Scales, and caregiver report of language and communication skills supported the observations during the AAC interactions. Future research directions and implications for therapy are discussed.
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Complex oncologic resection and reconstruction of the scalp: Predictors of morbidity and mortality
Tecce, Michael G.,Othman, Sammy,Mauch, Jaclyn T.,Nathan, Shelby,Tilahun, Estifanos,Broach, Robyn B.,Azoury, Said C.,Kovach, Stephen J. Korean Cleft Palate-Craniofacial Association 2020 Archives of Craniofacial Surgery Vol.21 No.4
Background: Oncologic resection of the scalp confers several obstacles to the reconstructive surgeon dependent upon patient-specific and wound-specific factors. We aim to describe our experiences with various reconstructive methods, and delineate risk factors for coverage failure and complications in the setting of scalp reconstruction. Methods: A retrospective chart review was conducted, examining patients who underwent resection of fungating scalp tumors with subsequent soft-tissue reconstruction from 2003 to 2019. Patient demographics, wound and oncologic characteristics, treatment modalities, and outcomes were recorded and analyzed. Results: A total of 189 patients were appropriate for inclusion, undergoing a range of reconstructive methods from skin grafting to free flaps. Thirty-three patients (17.5%) underwent preoperative radiation. In all, 48 patients (25.4%) suffered wound site complications, 25 (13.2%) underwent reoperation, and 47 (24.9%) suffered from mortality. Preoperative radiation therapy was an independent risk factor for wound complications (odds ratio [OR], 2.85; 95% confidence interval [CI], 1.1-7.3; p=0.028) and reoperations (OR, 4.45; 95% CI, 1.5-13.2; p=0.007). Similarly, the presence of an underlying titanium mesh was an independent predictor of wound complications (OR, 2.49; 95% CI, 1.1-5.6; p=0.029) and reoperations (OR, 3.40; 95% CI, 1.2-9.7; p=0.020). Both immunosuppressed status (OR, 2.88; 95% CI, 1.2-7.1; p=0.021) and preoperative radiation therapy (OR, 3.34; 95% CI, 1.2-9.7; p=0.022) were risk factors for mortality. Conclusion: Both preoperative radiation and the presence of underlying titanium mesh are independent risk factors for wound site complications and increased reoperation rates following oncologic resection and reconstruction of the scalp. Additionally, preoperative radiation, along with an immunosuppressed state, may predict patient mortality following scalp resection and reconstruction.
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Ying L. Liu,Olga T. Filippova,Qin Zhou,Alexia Iasonos,Dennis S. Chi,Oliver Zivanovic,Yukio Sonoda,Ginger J. Gardner,Vance A. Broach,Roisin E. OCearbhaill,Jason A. Konner,Carol Aghajanian,Kara Long Roc 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.1
Objective: Neoadjuvant chemotherapy (NACT) followed by interval debulking surgery (IDS)confers similar outcomes as primary debulking surgery and chemotherapy. Little is knownabout patients who receive NACT but do not undergo debulking surgery. Our aim was tocharacterize these patients. Methods: We prospectively identified patients with newly diagnosed stage III/IV ovariancancer treated with NACT from 7/1/15–12/1/17. Fisher exact and Wilcoxon rank-sum tests wereused to compare clinical characteristics by surgical status. The Kaplan-Meier method wasused to estimate survival outcomes. Log-rank test and Cox proportional hazards model wereapplied to assess the relationship of covariates to outcome, and time-dependent covariateswere applied to variables collected after diagnosis. Results: Of 224 women who received NACT, 162 (72%) underwent IDS and 62 (28%) didnot undergo surgery. The non-surgical group was older (p<0.001), had higher Charlsoncomorbidity index (CCI; p<0.001), lower albumin levels (p=0.007), lower Karnofskyperformance scores (p<0.001), and were more likely to have dose reductions in NACT(p<0.001). Reasons for no surgery included poor response to NACT (39%), death (15%),comorbidities (24%), patient preference (16%), and loss to follow-up (6%). The nosurgery group had significantly worse overall survival (OS) than the surgery group (hazardratio=3.34; 95% confidence interval=1.66–6.72; p<0.001), after adjustment for age, CCI, anddose reductions. Conclusions: A significant proportion of women treated with NACT do not undergo IDS, andthese women are older, frailer, and have worse OS. More studies are needed to find optimaltherapies to maximize outcomes in this high-risk, elderly population.
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