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https://www.readbyqxmd.com/read/29055280/optical-limiting-properties-of-3-5-dipyrenylvinylenebodipy-dyes-at-532nm
#1
Gugu Kubheka, Kayode Sanusi, John Mack, Tebello Nyokong
The optical limiting (OL) properties of 3,5-dipyrenylvinyleneBODIPY dyes that contain both electron withdrawing and donating moieties have been investigated by using the z-scan technique at 532nm in the nanosecond pulse range. The extension of the π-conjugation at the 3,5-positions with pyrenylvinylene groups results in a ca. 200nm red shift of the main BODIPY spectral band to ca. 700nm, so there is relatively weak absorbance at 532nm under ambient light conditions. Reverse saturable absorbance (RSA) profiles are observed in response to incident pulsed laser light that is consistent with a two photon absorption-assisted excited state absorption (ESA) mechanism in CH2Cl2 solution and when the dyes are embedded in poly(bisphenol carbonate A) (PBC) polymer thin films...
October 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29054372/simultaneously-overcome-tumor-vascular-endothelium-and-extracellular-matrix-barriers-via-a-non-destructive-size-controlled-nanomedicine
#2
Binghua Wang, Yongxia Zhai, Jinjin Shi, Luyang Zhuang, Wei Liu, Huijuan Zhang, Hongling Zhang, Zhenzhong Zhang
Tumor vascular endothelium and extracellular matrix (ECM) as the major barriers of anticancer nanomedicine greatly limited the anticancer efficacy of treatment, but few strategies were available to overcome them simultaneously. Thus, herein a strategy was presented to utilize reversible vasodilatation effect of nitric oxide (NO) and size-controlled characteristic of ultrasound responsive liposome (URL) to construct a non-destructive nanomedicine, which was able to cross both obstacles simultaneously. In this work, URL was built as a carrier via forming a gas layer between lipid bilayer to encapsulate small particles PAMAM@DOX (PD, ~10nm) and NO donation-nitrosoglutathione (GSNO)...
October 17, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29054231/lung-procurement-after-cardiac-death-in-a-donor-with-previous-median-sternotomy
#3
Chitaru Kurihara, Masashi Kawabori, Masahiro Ono, Syed T Hussain, Amit D Parulekar, Jeffrey A Morgan, Gabriel Loor
The shortage of lungs for organ donation is problematic, and meeting the demand by expanding the donor pool in lung transplantation is critical. Donation after cardiac death (DCD) is an under-used approach that could be a valuable source of organs. However, procuring lungs from donors with a previous median sternotomy is technically difficult and is usually avoided. Here, we describe the procurement of lungs from a DCD patient with a previous median sternotomy.
November 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29052563/predictive-score-model-for-delayed-graft-function-based-on-easily-available-variables-before-kidney-donation-after-cardiac-death
#4
Chen-Guang Ding, Qian-Hui Tai, Feng Han, Yang Li, Xiao-Hui Tian, Pu-Xun Tian, Xiao-Ming Ding, Xiao-Ming Pan, Jin Zheng, He-Li Xiang, Wu-Jun Xue
BACKGROUND: How to evaluate the quality of donation after cardiac death (DCD) kidneys has become a critical problem in kidney transplantation in China. Hence, the aim of this study was to develop a simple donor risk score model to evaluate the quality of DCD kidneys before DCD. METHODS: A total of 543 qualified kidneys were randomized in a 2:1 manner to create the development and validation cohorts. The donor variables in the development cohort were considered as candidate univariate predictors of delayed graft function (DGF)...
October 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29052534/specialist-advice-may-improve-patient-selection-for-decompression-therapy-following-diving-accidents-a-retrospective-observational-study
#5
Daniel Steffensmeier, Roland Albrecht, Jürg Wendling, Roger Melliger, Donat R Spahn, Philipp Stein, Christophe Wyss
BACKGROUND: Even in a landlocked country like Switzerland recreational diving is becoming more and more popular. Smaller lakes in the Alps are located at an altitude of 2500 m above sea level. The incidence of diving accidents among all helicopter emergency service missions and the consecutive medical knowledge about decompression injuries is low. Thus, a collaboration between the Swiss Air-Ambulance (Rega) and the divers alert network (DAN) was initiated to improve patient treatment and identification of decompression injury and necessity of hyperbaric oxygen therapy (HBO)...
October 19, 2017: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/29052242/emerging-infectious-disease-outbreaks-estimating-disease-risk-in-australian-blood-donors-travelling-overseas
#6
A Coghlan, V C Hoad, C R Seed, R Lp Flower, R J Harley, D Herbert, H M Faddy
BACKGROUND AND OBJECTIVES: International travel assists spread of infectious pathogens. Australians regularly travel to South-eastern Asia and the isles of the South Pacific, where they may become infected with infectious agents, such as dengue (DENV), chikungunya (CHIKV) and Zika (ZIKV) viruses that pose a potential risk to transfusion safety. In Australia, donors are temporarily restricted from donating for fresh component manufacture following travel to many countries, including those in this study...
October 19, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/29051158/family-veto-in-organ-donation-in-canada-framing-within-english-language-newspaper-articles
#7
Samantha J Anthony, Maeghan Toews, Timothy Caulfield, Linda Wright
BACKGROUND: Because organ transplantation relies on public support for donation, an analysis of public discourse around organ donation is essential. We investigated the portrayal of family veto - when a family overrides the deceased person's prior legally executed wishes to donate - in Canadian news media. METHODS: Using the Canadian Newsstream database, we identified articles published in English-language newspapers addressing family veto between 2000 and 2016...
October 17, 2017: CMAJ Open
https://www.readbyqxmd.com/read/29049418/effects-of-femtosecond-laser-and-other-surface-treatments-on-the-bond-strength-of-metallic-and-ceramic-orthodontic-brackets-to-zirconia
#8
Verónica García-Sanz, Vanessa Paredes-Gallardo, Carlos Bellot-Arcís, Omel Mendoza-Yero, Carlos Doñate-Buendía, Javier Montero, Alberto Albaladejo
Femtosecond laser has been proposed as a method for conditioning zirconia surfaces to boost bond strength. However, metallic or ceramic bracket bonding to femtosecond laser-treated zirconia surfaces has not been tested. This study compared the effects of four conditioning techniques, including femtosecond laser irradiation, on shear bond strength (SBS) of metallic and ceramic brackets to zirconia.Three hundred zirconia plates were divided into five groups: 1) control (C); 2) sandblasting (APA); 3) silica coating and silane (SC); 4) femtosecond laser (FS); 5) sandblasting followed by femtosecond laser (APA+SC)...
2017: PloS One
https://www.readbyqxmd.com/read/29049357/associations-of-health-status-with-subsequent-blood-donor-behavior-an-alternative-perspective-on-the-healthy-donor-effect-from-donor-insight
#9
Katja van den Hurk, Saurabh Zalpuri, Femmeke J Prinsze, Eva-Maria Merz, Wim L A M de Kort
INTRODUCTION: In donor health research, the 'Healthy Donor Effect' (HDE) often biases study results and hampers their interpretation. This refers to the fact that donors are a selected 'healthier' subset of a population due to both donor selection procedures and self-selection. Donors with long versus short donor careers, or with high versus low donation intensities are often compared to avoid this HDE, but underlying health differences might also cause these differences in behaviour...
2017: PloS One
https://www.readbyqxmd.com/read/29049046/determination-of-death-in-donation-after-circulatory-death-an-ethical-propriety
#10
Andrew McGee, Dale Gardiner, Paul Murphy
PURPOSE OF REVIEW: The recently developed donation after circulatory death (DCD) heart transplant technique, pioneered by Papworth Hospital in the UK, involves the use of extracorporeal perfusion technologies to restart the donor heart in situ and thereby restore the donor's own circulation, after first isolating the donor's cerebral circulation. By restoring the circulation in the deceased donor, even if the cerebral circulation is excluded, the Papworth technique challenges the acceptability of death determination in DCD...
October 18, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/29047273/thiophene-thiazole-based-semiconducting-copolymers-for-high-performance-polymer-field-effect-transistors
#11
Jong Won Chung, Won-Tae Park, Jeong-Il Park, Youngjun Yun, Xiaodan Gu, Jiyoul Lee, Yong-Young Noh
We report a newly-synthesized donor (D) - acceptor (A) type semiconducting copolymer, consisting of thiophene as an electron-donating and thiazole as an electron-accepting unit (PQTBTz-TT-C8) for the active layer of the organic field-effect transistors (OFETs). Specifically, this study investigates the structure and electrical property relationships of PQTBTz-TT-C8 with comprehensive analyses on the charge-transporting properties corresponding to the spin rate of the spin-coater during the formation of the PQTBTz-TT-C8 film...
October 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29046454/mechanisms-of-herv-k-hml-2-transcription-during-human-mammary-epithelial-cell-transformation
#12
Meagan Montesion, Neeru Bhardwaj, Zachary H Williams, Charlotte Kuperwasser, John M Coffin
Increasing evidence suggests that repetitive elements may play a role in host gene regulation, particularly through the donation of alternative promoters, enhancers, splice sites, and termination signals. Elevated transcript expression of the endogenous retrovirus group HERV-K (HML-2) is seen in many human cancers, although the identity of the individual proviral loci contributing to this expression as well as their mechanism of activation has been unclear. Using high-throughput next-generation sequencing techniques optimized for the capture of HML-2 expression, we characterized the HML-2 transcriptome and means of activation in an in vitro model of human mammary epithelial cell transformation...
October 18, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29045706/kidney-injury-molecule-1-staining-in-renal-allograft-biopsies-10-days-after-transplantation-is-inversely-correlated-with-functioning-proximal-tubular-epithelial-cells
#13
Jonna R Bank, Pieter van der Pol, Dianne Vreeken, Catherine Monge-Chaubo, Ingeborg M Bajema, Nicole Schlagwein, Daniëlle J van Gijlswijk, Sandra W van der Kooij, Marlies E J Reinders, Johan W de Fijter, Cees van Kooten
Background: Kidney injury molecule-1 (KIM-1) and neutrophil gelatinase-associated lipocalin (NGAL) are promising biomarkers for monitoring delayed graft function (DGF) after kidney transplantation. Here we investigated localization and distribution of KIM-1 and NGAL staining in renal allograft biopsies and studied their association with histological features, functional DGF (fDGF) and the tubular function slope (TFS), a functioning proximal tubular epithelial cell (PTEC) marker. Methods: Day 10 protocol biopsies of 64 donation after circulatory death recipients were stained for KIM-1 and NGAL and the positive area was quantified using ImageJ software...
October 16, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29045248/the-evolution-of-donation-after-circulatory-death-donor-kidney-repair-in-the-united-kingdom
#14
Sarah A Hosgood, Michael L Nicholson
PURPOSE OF REVIEW: The increasing reliance on marginal donors has driven research to investigate ways to repair and improve the quality of kidneys for transplantation. Normothermic perfusion technologies provide an opportunity for improved preservation, organ assessment and resuscitation/repair of damaged kidneys. This review describes the evolution of normothermic perfusion in kidney transplantation in the United Kingdom. RECENT FINDINGS: One hour of normothermic perfusion can be used to restore function and improve early graft function of extended criteria donor kidneys...
October 17, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/29043965/japanese-encephalitis-virus-transmitted-via-blood-transfusion-hong-kong-china
#15
Vincent C C Cheng, Siddharth Sridhar, Shuk-Ching Wong, Sally C Y Wong, Jasper F W Chan, Cyril C Y Yip, Chi-Hung Chau, Timmy W K Au, Yu-Yan Hwang, Carol S W Yau, Janice Y C Lo, Cheuk-Kwong Lee, Kwok-Yung Yuen
Japanese encephalitis virus (JEV) is a mosquitoborne virus endemic to China and Southeast Asia that causes severe encephalitis in <1% of infected persons. Transmission of JEV via blood transfusion has not been reported. We report transmission of JEV via blood donation products from an asymptomatic viremic donor to 2 immunocompromised recipients. One recipient on high-dose immunosuppressive drugs received JEV-positive packed red blood cells after a double lung transplant; severe encephalitis and a poor clinical outcome resulted...
January 15, 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29043962/usutu-virus-infections-among-blood-donors-austria-july-and-august-2017-raising-awareness-for-diagnostic-challenges
#16
Tamás Bakonyi, Christof Jungbauer, Stephan W Aberle, Jolanta Kolodziejek, Katharina Dimmel, Karin Stiasny, Franz Allerberger, Norbert Nowotny
Between July and August 2017, seven of 12,047 blood donations from eastern Austria, reacted positive to West Nile virus (WNV) in the cobas test (Roche). Follow-up investigations revealed Usutu virus (USUV) nucleic acid in six of these. Retrospective analyses of four blood donors diagnosed as WNV-infected in 2016 showed one USUV positive. Blood transfusion services and public health authorities in USUV-endemic areas should be aware of a possible increase of human USUV infections.
October 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/29043828/a-lu-16-individual-with-antibodies
#17
Carole Éthier, Cynthia Parent, Anne-Sophie Lemay, Nadia Baillargeon, Geneviève Laflamme, Josée Lavoie, Josée Perreault, Maryse St-Louis
Antibodies against Lutheran blood group antigens have been observed during first-time pregnancy. Samples from a woman of African descent were tested in our immunohematology laboratory on several occasions since 2001. Her samples were phenotyped as Lu(a+b-), and anti-Lub was suspected but not identified. She was asked to make autologous donations in preparation for her delivery, which she did. In 2010, two antibodies were identified: anti-Lea and -Lub. Six years later, a third investigation was requested. This time, an antibody directed at a high-prevalence Lutheran antigen was found in addition to the anti-Lea and -Lub previously observed...
September 2017: Immunohematology
https://www.readbyqxmd.com/read/29043523/analysis-of-potential-factors-affecting-allografts-contamination-at-retrieval
#18
A Paolin, C Romualdi, L Romagnoli, D Trojan
The microbiological contamination of retrieved tissues has become a very important topic and it is a critical aspect in the safety of allografts, especially from multi-tissue donors whose tissues are frequently contaminated as a consequence of retrieval. We analysed a total of 10,107 tissues, 8178 musculoskeletal and 1929 cardiovascular tissues, retrieved from 978 multi-tissue donors. Of these, 159 heart-beating donors (HBD) were also organ donors, while the remaining 819 non-heart-beating donors (NHBD) were tissue donors only...
October 17, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29040638/low-serum-progesterone-on-the-day-of-embryo-transfer-is-associated-with-a-diminished-ongoing-pregnancy-rate-in-oocyte-donation-cycles-after-artificial-endometrial-preparation-a-prospective-study
#19
E Labarta, G Mariani, N Holtmann, P Celada, J Remohí, E Bosch
STUDY QUESTION: Is there a relationship between serum progesterone (P) and endometrial volume on the day of embryo transfer (ET) with ongoing pregnancy rate (OPR) in artificial endometrium preparation cycles? SUMMARY ANSWER: Patients with serum P < 9.2 ng/ml on the day of ET had a significantly lower OPR but endometrial volume was not related with OPR. WHAT IS KNOWN ALREADY: A window of optimal serum P levels during the embryo implantation period has been described in artificial endometrium preparation cycles...
October 13, 2017: Human Reproduction
https://www.readbyqxmd.com/read/29039673/rapid-access-to-a-broad-range-of-6-substituted-firefly-luciferin-analogues-reveals-surprising-emitters-and-inhibitors
#20
Deepak K Sharma, Spencer T Adams, Kate L Liebmann, Stephen C Miller
Light-emitting firefly luciferin analogues contain electron-donating groups in the 6'-position, but the scope of known 6'-substitution remains narrow. A two-step route to a broad range of 6'-substituted luciferin analogues was developed to fill this void and enable more extensive study of the 6'-functionality. This chemistry allowed direct access to "caged" amide and bright azetidine analogues, but also revealed thioether inhibitors and unexpectedly luminogenic aryl amine derivatives.
October 17, 2017: Organic Letters
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