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Walker R, Sweeney J, Koch R, Moore C, Meshul C. P2.059 Effects of subthalamic nucleus lesions and short-term stimulation upon striatal glutamate levels in awake intact and 6-hydroxy/dopamine-lesioned rats. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70410-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Khoo CL, Davies AJ, Dobson CM, Cheesbrough J, Edwards J, Sweeney J. Disseminated gonococcal infection in pregnancy. J OBSTET GYNAECOL 2009; 29:550-1. [PMID: 19697211 DOI: 10.1080/01443610902780807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Phillips M, Lazaro N, Sweeney J, Hesketh L, Lamden K. Increasing HIV testing in general practice: brief advice seems to work. Int J STD AIDS 2009; 20:806. [PMID: 19854880 DOI: 10.1258/ijsa.2009.009383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Sweeney J. Aziridine Synthesis via Nucleophilic Attack of Carbene Equivalents on Imines: the Aza‐Darzens Reaction. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900211] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
BACKGROUND Babesiosis is caused by an intraerythrocytic protozoan transmitted by ticks. Blood transfusion is another mode of transmission. STUDY DESIGN AND METHODS This was a retrospective study based on babesiosis cases reported to the Rhode Island Department of Health between 1999 and 2007. Additional cases were also identified. RESULTS Twenty-one cases of transfusion-transmitted babesiosis (TTB) were identified from 1999 through 2007. From 2005 through 2007, the incidence approached one case per 9000 units of blood transfused. One of 21 (5%) TTB cases was diagnosed in July, in sharp contrast to 65 of 152 (43%) of the total babesiosis cases diagnosed during July in Rhode Island. Many cases were identified when a complete blood count with a differential was routinely requested and parasites were noted by laboratory technologists. Most patients with TTB had underlying conditions known to predispose to symptomatic infection. CONCLUSION Blood transfusion is an important mode of Babesia transmission. The current screening method of omitting donors with a history of babesiosis may be effective in preventing some, but not all, cases of TTB and current processing of blood products does not eradicate this parasite. Thus, a better screening test is needed. Alternatively, pathogen reduction technology could be utilized to prevent this mode of transmission.
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Astolfi L, De Vico Fallani F, Cincotti F, Mattia D, Marciani MG, Salinari S, Sweeney J, Miller GA, He B, Babiloni F. Estimation of effective and functional cortical connectivity from neuroelectric and hemodynamic recordings. IEEE Trans Neural Syst Rehabil Eng 2008; 17:224-33. [PMID: 19273037 DOI: 10.1109/tnsre.2008.2010472] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this paper, different linear and nonlinear methodologies for the estimation of cortical connectivity from neuroelectric and hemodynamic measurements are reviewed and applied on common data set in order to highlight similarities and differences in the results. Different effective and functional connectivity methods were applied to motor and cognitive data sets, including structural equation modeling (SEM), directed transfer function (DTF), partial directed coherence (PDC), and direct directed transfer function (dDTF). Comparisons were made between the results in order to understand if, for a same dataset, effective and functional connectivity estimators can return the same cortical connectivity patterns. An application of a nonlinear method [phase synchronization index (PSI)] to similar executed and imagined movements was also reviewed. Connectivity patterns estimated with the use of the neuroelectric information and of the information from the multimodal integration of neuroelectric and hemodynamic data were also compared. Results suggests that the estimation of the cortical connectivity patterns performed with the linear methods (SEM, DTF, PDC, dDTF) or with the nonlinear method (PSI) on movement related potentials returned similar cortical networks. Differences in cortical connectivity were noted between the patterns estimated with the use of multimodal integration and those estimated by using only the neuroelectric data.
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Laga A, Cheves T, Maroto S, Coutts M, Sweeney J. The suitability of hemolyzed specimens for compatibility testing using automated technology. Transfusion 2008; 48:1713-20. [PMID: 18482191 DOI: 10.1111/j.1537-2995.2008.01741.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Blood banks have historically rejected hemolyzed specimens for ABO type and antibody screen based on concerns of artifactual interference with test performance or the detection of incompatibility. Samples from emergency departments (EDs) are commonly discarded due to hemolysis or mislabeling. STUDY DESIGN AND METHODS This study investigated whether hemolysis produced via experimental mechanical stress has a threshold for introducing discrepancy in ABO-Rh typing and antibody screening using an automated gel testing system (ProVue, Ortho-Clinical Diagnostics, Inc.). RESULTS Twenty-three samples from healthy subjects were shown to have threshold supernatant hemoglobin (Hb) levels producing discrepancy in the results for both ABO reverse type and antibody screen at 75 and 125 mg per dL, respectively. Above these levels of Hb, both tests became uninterpretable and reported as "no result determined." Twenty of 31 positive antibody screens became uninterpretable after experimental hemolysis without any threshold supernatant Hb being evident, likely explained by the duration of specimen storage before experimental hemolysis. No false-positive or false-negative samples were observed in the antibody screen of the hemolyzed specimens. CONCLUSIONS Properly collected hemolyzed specimens present an opportunity for ABO-Rh forward typing, and a significant proportion of such specimens give valid (concordant) results for reverse type and antibody screen. Our data, although device-specific, are adequate to suggest that sample discard and recollection due to hemolysis in blood bank specimens should be reconsidered with potential benefits for patient safety and efficiency.
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Laga A, Kurtis J, Sweeney J. Recurrent transfusion-related acute lung injury after fresh frozen plasma in a patient with hereditary factor V deficiency. Am J Hematol 2008; 83:680. [PMID: 18429049 DOI: 10.1002/ajh.21164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Sweeney J, Sançon J. A Low-Temperature Ammonium Ylid Rearrangement: Enhanced Reactivity Engendered by Rigidity. Synlett 2008. [DOI: 10.1055/s-2008-1078256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Sweeney J, Kouttab N, Holme S, Cheves T, Nelson E. In vitro evaluation of prestorage pools consisting of mixed A and O platelet concentrates. Transfusion 2007; 47:1154-61. [PMID: 17581149 DOI: 10.1111/j.1537-2995.2007.01250.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Current FDA regulations allow the prestorage pooling of whole blood-derived platelet concentrates (PCs) of identical ABO type in a recently cleared platelet (PLT) pooling bag (Acrodose, Pall Medical). It is unclear how ABO-mixed PC pools would store if pooled before storage. STUDY DESIGN AND METHODS Pools consisting of ABO-identical PLTs and mixed A and O PLTs in varying proportions were evaluated on Days 1, 5, and 7 of storage with measures of the PLT storage lesion, lymphocyte activation, and activation of the complement and coagulation system. Data were analyzed by analysis of variance. RESULTS Pools did not differ on Day 7 in pH (p = 0.63), hypotonic shock response (p = 0.25), extent of shape change (p = 0.26), morphology score (p = 0.18), or white cell count (p = 0.79), but surface P-selectin expression was more evident in the ABO-mixed pools (p = 0.02). Small microscopic clumps of PLTs were observed in all pools, but were more prominent in the ABO-mixed pools (p < 0.01). PLT counts, however, did not differ between pools (p = 0.93), indicating that only a small proportion of PLTs were clumped. Surface A-antigen expression was proportional to the number of A PCs in each pool and did not vary between study days. Anti-A(1) titers were either unchanged or decreased by one dilution. Complement and coagulation activation markers did not differ between pools. CONCLUSION Pooling A and O PCs is associated with evidence of increased microscopic PLT clumping and activation, but these differences are not exacerbated with 7-day storage. Other major measures of PLT quality do not differ, and there was no evidence of a mixed lymphocyte reaction.
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Babiloni F, Mattia D, Basilisco A, Astolfi L, Cincotti F, Ding L, Christine K, Sweeney J, Edgar JC, Miller GA, He B. Improved estimation of human cortical activity and connectivity with the multimodal integration of neuroelectric and hemodynamic data. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2005:5888-91. [PMID: 17281600 DOI: 10.1109/iembs.2005.1615830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In the last decade, the possibility to noninvasively estimate cortical activity and connectivity has been highlighted by the application of the techniques known as high resolution EEG. These techniques include a subject's multi-compartment head model (scalp, skull, dura mater, cortex) constructed from individual magnetic resonance images, multi-dipole source model, and regularized linear inverse source estimates of cortical current density. More recently, it has proved as the use of information from the hemodynamic responses of the cortical areas as revealed by block-designed (strength of activated voxels) fMRI improves dramatically the estimates of cortical activity and connectivity. Here, we present some applications of such estimation in two set of high resolution EEG and fMRI data, related to the motor (finger tapping) and cognitive (Stroop) tasks. We observed that the proposed technology was able to unveil the direction of the information flow between the cortical regions of interest.
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Sweeney J, Caton-Rose P, Spares R, Coates PD. Unified model of necking and shear banding in amorphous and semicrystalline polymers. J Appl Polym Sci 2007. [DOI: 10.1002/app.26546] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sweeney J, Carter N, Mabon R, Walmsley R, Richecœur A. Double Coupling Reactions of 3,4-Bis(stannyl)furanone: Facile Preparation of Diaryl- and Dibenzylfuranones. Synlett 2006. [DOI: 10.1055/s-2006-944209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sweeney J, Carter N, Mabon R. Stille Reactions of 2,3-Bis(stannyl)butenoates: An Unexpected Regioselectivity. Synlett 2006. [DOI: 10.1055/s-2006-944207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sweeney J, Kouttab N, Holme S, Kurtis J, Cheves T, Nelson E. Storage of platelet-rich plasma-derived platelet concentrate pools in plasma and additive solution. Transfusion 2006; 46:835-40. [PMID: 16686852 DOI: 10.1111/j.1537-2995.2006.00804.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Prestorage pooling of platelet (PLT)-rich plasma (PRP)-derived PLT concentrates (PCs) and storage in either plasma (PS) or an additive solution (AS) is logistically feasible and would result in a product similar to buffy-coat or apheresis PLTs. STUDY DESIGN AND METHODS On Day 0, PS PRP PCs were pooled with a sterile connecting device into a new 1.3-L storage container (ELX, PALL Medical). AS-PCs were prepared by addition of a new low-pH glucose-containing AS to the PLT sediment. AS-PCs were pooled into a 1.3-L ELX bag containing four tablets of NaHCO3. PC pools were sampled on Days 1, 5, and 7. RESULTS PS pools containing 5 units had a mean PLT yield similar to the AS pools (39 x 10(10) +/- 3 x 10(10) vs. 37 x 10(10) +/- 6 x 10(10); p = 0.25). All pools had WBC counts of less than 1 x 10(6). pH and HCO3 decreased in PS pools with storage, but either increased or remained constant in the AS pools. On Day 7, no differences were seen in morphology score or extent of shape change. Hypotonic shock response was better preserved in the plasma pools (71 +/- 12% vs. 56 +/- 13%, p < 0.01); however, surface P-selectin was expressed less in the AS pools (6 +/- 4% vs. 18 +/- 10%, p < 0.01). CONCLUSION Manufacture and storage of PRP-PCs in pools either in plasma or in a glucose-containing AS in this new container are feasible, and there is good preservation of PLT quality to Day 7.
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Robeck TR, Steinman KJ, Yoshioka M, Jensen E, O'Brien JK, Katsumata E, Gili C, McBain JF, Sweeney J, Monfort SL. Estrous cycle characterisation and artificial insemination using frozen–thawed spermatozoa in the bottlenose dolphin (Tursiops truncatus). Reproduction 2005; 129:659-74. [PMID: 15855629 DOI: 10.1530/rep.1.00516] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The reproductive endocrinology of the bottlenose dolphin,Tursiops truncatus,was characterized to facilitate the development of artificial insemination using cryopreserved spermatozoa. Specific objectives were: (i) to determine the excretory dynamics of urinary luteinizing hormone (LH) and ovarian steroid metabolites during the estrous cycle; (ii) to evaluate the effect of an exogenously administered synthetic progesterone analog (altrenogest) on reproductive hormone excretion; (iii) to correlate follicular growth and ovulation (as determined by transabdominal ultrasound) to urinary LH and ovarian steroid metabolites; (iv) examine thein vivofertilisation capacity of cryopreserved semen, and (v) to develop an intrauterine insemination technique. Based on urinary endocrine monitoring of natural estrous cycles (2 consecutive cycles) and nine post altrenogest cycles in ten females, estrous cycles were found to be 36 days long and comprised of an 8 day and 19 day follicular and luteal phase, respectively. Peak estrogen conjugates (EC; 5.4 ± 3.8 ng/mg creatinine (Cr)) occurred 8 h prior to the LH surge (70.9 ± 115.7 ng/mg Cr). The time of ovulation, as determined by ultrasonography, occurred 32.1 ± 8.9 h and 24.3 ± 7.0 h after the onset of the LH surge and LH peak, respectively. Mean preovulatory follicular diameter and circumference were 2.1 ± 0.5 cm and 6.5 ± 1.5 cm, respectively. Of the 27 estrous synchronisation attempts, 13 resulted in an ovulatory cycle, with ovulation occurring 21 days post-altrenogest treatment. Intrauterine (4 of 5) and intracornual (1 of 3) inseminations conducted across eight estrous cycles resulted in five pregnancies (63%), one pregnancy resulted from the use of liquid stored semen, whereas four were achieved using cryopreserved semen. These data provide new information on female bottlenose dolphin reproductive physiology, and demonstrate that the combination of endocrine monitoring and serial ultrasonography contributed to successful AI using liquid-stored and cryopreserved semen.
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Sweeney J, Caton-Rose P, Coates PD. Modeling the large-strain constitutive behavior of polycarbonate under isothermal and anisothermal conditions. J Appl Polym Sci 2005. [DOI: 10.1002/app.21681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Babiloni F, Cincotti F, Babiloni C, Carducci F, Mattia D, Astolfi L, Basilisco A, Rossini PM, Ding L, Ni Y, Cheng J, Christine K, Sweeney J, He B. Estimation of the cortical functional connectivity with the multimodal integration of high-resolution EEG and fMRI data by directed transfer function. Neuroimage 2005; 24:118-31. [PMID: 15588603 DOI: 10.1016/j.neuroimage.2004.09.036] [Citation(s) in RCA: 222] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2004] [Revised: 05/17/2004] [Accepted: 09/23/2004] [Indexed: 10/26/2022] Open
Abstract
Nowadays, several types of brain imaging device are available to provide images of the functional activity of the cerebral cortex based on hemodynamic, metabolic, or electromagnetic measurements. However, static images of brain regions activated during particular tasks do not convey the information of how these regions communicate with each other. In this study, advanced methods for the estimation of cortical connectivity from combined high-resolution electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) data are presented. These methods include a subject's multicompartment head model (scalp, skull, dura mater, cortex) constructed from individual magnetic resonance images, multidipole source model, and regularized linear inverse source estimates of cortical current density. Determination of the priors in the resolution of the linear inverse problem was performed with the use of information from the hemodynamic responses of the cortical areas as revealed by block-designed (strength of activated voxels) fMRI. We estimate functional cortical connectivity by computing the directed transfer function (DTF) on the estimated cortical current density waveforms in regions of interest (ROIs) on the modeled cortical mantle. The proposed method was able to unveil the direction of the information flow between the cortical regions of interest, as it is directional in nature. Furthermore, this method allows to detect changes in the time course of information flow between cortical regions in different frequency bands. The reliability of these techniques was further demonstrated by elaboration of high-resolution EEG and fMRI signals collected during visually triggered finger movements in four healthy subjects. Connectivity patterns estimated for this task reveal an involvement of right parietal and bilateral premotor and prefrontal cortical areas. This cortical region involvement resembles that revealed in previous studies where visually triggered finger movements were analyzed with the use of separate EEG or fMRI measurements.
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Minshew NJ, Sweeney J, Luna B. Autism as a selective disorder of complex information processing and underdevelopment of neocortical systems. Mol Psychiatry 2003; 7 Suppl 2:S14-5. [PMID: 12142935 DOI: 10.1038/sj.mp.4001166] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Unwin AP, Duckett RA, Ward IM, Collins TLD, Sweeney J, Coates PD. Suppression of necking in polyethylene. J Appl Polym Sci 2002. [DOI: 10.1002/app.11337] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Read DJ, Teixeira PIC, Duckett RA, Sweeney J, McLeish TCB. Theoretical and finite-element investigation of the mechanical response of spinodal structures. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2002; 8:15-31. [PMID: 15010980 DOI: 10.1007/pl00022337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In recent years there have been major advances in our understanding of the mechanisms of phase separation in polymer and copolymer blends, to the extent that good control of phase-separated morphology is a real possibility. Many groups are studying the computational simulation of polymer phase separation. In the light of this, we are exploring methods which will give insight into the mechanical response of multiphase polymers. We present preliminary results from a process which allows the production of a two-dimensional finite-element mesh from the contouring of simulated composition data. We examine the stretching of two-phase structures obtained from a simulation of linear Cahn-Hilliard spinodal phase separation. In the simulations, we assume one phase to be hard, and the other soft, such that the shear modulus ratio G is large (>or= 10(3)). We indicate the effect of varying composition on the material modulus and on the distribution of strains through the stretched material. We also examine in some detail the symmetric structures obtained at 50% composition, in which both phases are at a percolation threshold. Inspired by simulation results for the deformation of these structures, we construct a "scaling" theory, which reproduces the main features of the deformation. Of particular interest is the emergence of a lengthscale, below which the deformation is non-affine. This length is proportional to G(1/4), and hence is still quite small for all reasonable values of this ratio. The same theory predicts that the effective composite modulus scales also as G(1/4), , which is supported by the simulations.
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Charlton R, Moore S, Sweeney J, Fealy R. Climate change and water resources in Ireland : initial investigation using downscaled GCMS and hydrological modelling techniques. ACTA ACUST UNITED AC 2001. [DOI: 10.18172/cig.1118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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