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https://www.readbyqxmd.com/read/28431372/down-flow-fixed-structured-bed-reactor-an-innovative-reactor-configuration-applied-to-acid-mine-drainage-treatment-and-metal-recovery
#1
Leandro Augusto Gouvêa de Godoi, Eugenio Foresti, Márcia Helena Rissato Zamariolli Damianovic
A down-flow fixed-structured bed reactor (DFSBR) was operated for 277 days treating a mixture of synthetic substrates simulating an iron-rich acid mine drainage (AMD) and the soluble fraction of a sugarcane vinasse. The synthetic sugarcane vinasse was used as electron donor for biological sulfate-reduction, resulting in influent chemical oxygen demand (COD) close to 4000 mg L(-1) and volumetric organic loading rate of 4.8 g L(-1)d(-1). The influent sulfate concentration was kept close to 2000 mg L(-1) (volumetric sulfate loading rate of 2...
April 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28431203/donor-safety-in-living-donor-liver-transplantation-the-korean-organ-transplantation-registry-kotry-study
#2
Jae Geun Lee, Kwang-Woong Lee, Choon Hyuck David Kwon, Chong Woo Chu, Bong-Wan Kim, Dong Lak Choi, Young Kyoung You, Dong-Sik Kim, Yang Won Nah, Koo Jeong Kang, In Soek Choi, Hee Chul Yu, Geun Hong, Ho-Seong Han, Shin Hwang, Myoung Soo Kim
Major concerns about donor safety cause controversy and limit the use of living donor liver transplantation to overcome organ shortages. The Korean Organ Transplantation Registry established a nationwide organ transplantation registration system in 2014. We reviewed the prospectively collected data of all 832 live liver donors who underwent procedures between April 2014 and December 2015. We allocated the donors to a left lobe group (n=59) and a right lobe group (n=773) and analyzed the relations between graft types and remaining liver volumes and complications (graded using the Clavien five-tier grading system)...
April 21, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28430197/g-quadruplex-organic-frameworks
#3
Yi-Lin Wu, Noah E Horwitz, Kan-Sheng Chen, Diego A Gomez-Gualdron, Norman S Luu, Lin Ma, Timothy C Wang, Mark C Hersam, Joseph T Hupp, Omar K Farha, Randall Q Snurr, Michael R Wasielewski
Two-dimensional covalent organic frameworks often π stack into crystalline solids that allow precise spatial positioning of molecular building blocks. Inspired by the hydrogen-bonded G-quadruplexes found frequently in guanine-rich DNA, here we show that this structural motif can be exploited to guide the self-assembly of naphthalene diimide and perylene diimide electron acceptors end-capped with two guanine electron donors into crystalline G-quadruplex-based organic frameworks, wherein the electron donors and acceptors form ordered, segregated π-stacked arrays...
May 2017: Nature Chemistry
https://www.readbyqxmd.com/read/28429866/successful-multiple-organ-donation-after-donor-brain-death-due-to-actinomyces-israelii-meningitis
#4
Leonel Lagunes, Oscar Len, Alberto Sandiumenge, Elena Martínez-Saez, Tomás Pumarola, Marta Bodro, Antonio Macías, Jose T Silva, F Xavier Nuvials, Ramon Charco, Francesc Moreso, Teresa Pont
The increasing gap between availability of solid organs for transplantation and the demand has led to the inclusion of donors which according to current guidelines may be discarded, some of them because of the possibility for transmission of infection to their recipients. We present the first report, to the best of our knowledge, of a case of a brain-dead donor with a localized and treated Actinomyces israelii central nervous system infection who, after a thorough evaluation, led to successful transplant procedures in four recipients...
April 21, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28429072/kidney-development-and-perspectives-for-organ-engineering
#5
REVIEW
Ganna Reint, Aleksandra Rak-Raszewska, Seppo J Vainio
Organ transplantation is currently the best strategy for treating end stage renal disease (ESRD) but the numbers of donor kidneys available are not sufficient to meet the needs of the ever-increasing ESRD population. Therefore, developments in the field of tissue engineering are necessary to provide alternative treatments. Decellularization and three-dimensional (3D) bioprinting strategies may serve as attractive novel options. Since successful tissue engineering requires an in -depth understanding of organ development and regulatory pathways, we discuss signaling in renal development and the composition of the renal extracellular matrix before presenting progress in the decellularization and 3D bioprinting fields...
April 20, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28427653/thermolysis-synthesis-of-pure-phase-nio-from-novel-sonochemical-synthesized-ni-ii-nano-metal-organic-supramolecular-architecture
#6
Younes Hanifehpour, Ali Morsali, Babak Mirtamizdoust, Sang Woo Joo, Behzad Soltani
Nano-structures of a new supramolecular coordination compound of divalent nickel with the pyrazol (pzH) containing the terminal azide anions, [Ni(pzH)2(N3)2] (1), with discrete molecular architecture (DMA) in solid state was synthesized via sonochemical method. The new nanostructure was characterized by scanning electron microscopy, X-ray powder diffraction, IR, and elemental analysis. Compound 1 was structurally characterized by single crystal X-ray diffraction and the single-crystal X-ray data shows that the coordination number of Ni (II) ions is six, (NiN6), with four N-donor atoms from neutral "pzH" ligands and two N-donors from two terminal azide anions...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427630/porosity-and-dye-adsorption-enhancement-by-ultrasonic-synthesized-cd-ii-based-metal-organic-framework
#7
Mohammad Yaser Masoomi, Minoo Bagheri, Ali Morsali
A Cd(II) based metal-organic framework, TMU-7, was synthesized by incorporation of V-shaped flexible dicarboxylate ligand and the N-donor pillar ligand using sonochemical method while morphology and size of particles were investigated and characterized by scanning electron microscopy and X-ray powder diffraction. Moreover, N2 adsorption was applied to examine the effect of synthesis method on porosity. Also TMU-7 was evaluated for its Congo red adsorption.
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28426684/long-term-results-after-transplantation-of-pediatric-liver-grafts-from-donation-after-circulatory-death-donors
#8
Rianne van Rijn, Pieter E R Hoogland, Frank Lehner, Ernest L W van Heurn, Robert J Porte
BACKGROUND: Liver grafts from donation after circulatory death (DCD) donors are increasingly accepted as an extension of the organ pool for transplantation. There is little data on the outcome of liver transplantation with DCD grafts from a pediatric donor. The objective of this study was to assess the outcome of liver transplantation with pediatric DCD grafts and to compare this with the outcome after transplantation of livers from pediatric donation after brain death (DBD) donors. METHOD: All transplantations performed with a liver from a pediatric donor (≤16 years) in the Netherlands between 2002 and 2015 were included...
2017: PloS One
https://www.readbyqxmd.com/read/28426645/announcement-world-malaria-day-april-25-2017
#9
(no author information available yet)
World Malaria Day is commemorated each year on April 25, the date in 2000 when leaders of 44 African nations met in Abuja, Nigeria, and committed their countries to reducing the number of malaria-related deaths. Approximately 90% of all malaria deaths occur in Africa (1). During the last 15 years, donors have collectively supported the procurement and distribution of billions of insecticide-treated bed nets and courses of artemisinin-based combination therapy globally. These improvements in malaria control are estimated to have saved an estimated 6...
April 21, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28426449/temperature-and-oxygenation-during-organ-preservation-friends-or-foes
#10
Nicholas Gilbo, Diethard Monbaliu
PURPOSE OF REVIEW: The liberalization of donor selection criteria in organ transplantation, with the increased use of suboptimal grafts, has stimulated interest in ischemia-reperfusion injury prevention and graft reconditioning. Organ preservation technologies are changing considerably, mostly through the reintroduction of dynamic machine preservation. Here, we review the current evidence on the role of temperature and oxygenation during dynamic machine preservation. RECENT FINDINGS: A large but complex body of evidence exists and comparative studies are few...
April 19, 2017: Current Opinion in Organ Transplantation
https://www.readbyqxmd.com/read/28425928/porcine-circoviruses-and-xenotransplantation
#11
REVIEW
Joachim Denner, Annette Mankertz
Allotransplantation and xenotransplantation may be associated with the transmission of pathogens from the donor to the recipient. Whereas in the case of allotransplantation the transmitted microorganisms and their pathogenic effect are well characterized, the possible influence of porcine microorganisms on humans is mostly unknown. Porcine circoviruses (PCVs) are common in pig breeds and they belong to porcine microorganisms that still have not been fully addressed in terms of evaluating the potential risk of xenotransplantation using pig cells, tissues, and organs...
April 20, 2017: Viruses
https://www.readbyqxmd.com/read/28425018/hepatocellular-carcinoma-and-liver-transplantation-changing-patterns-and-practices
#12
REVIEW
Nicole E Rich, Neehar D Parikh, Amit G Singal
Benefits of liver transplantation (LT) for patients with hepatocellular carcinoma (HCC) are well established. However, there is debate regarding optimal and equitable selection of patients best served by LT, particularly in the face of limited organ availability. Herein, we discuss topics regarding LT selection criteria for patients with HCC. Recent change in UNOS policy currently mandates a 6-month observation period prior to priority listing and institutes a cap of 34 MELD exception points for patients with HCC...
April 19, 2017: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/28424769/folates-in-plants-research-advances-and-progress-in-crop-biofortification
#13
REVIEW
Vera Gorelova, Lars Ambach, Fabrice Rébeillé, Christophe Stove, Dominique Van Der Straeten
Folates, also known as B9 vitamins, serve as donors and acceptors in one-carbon (C1) transfer reactions. The latter are involved in synthesis of many important biomolecules, such as amino acids, nucleic acids and vitamin B5. Folates also play a central role in the methyl cycle that provides one-carbon groups for methylation reactions. The important functions fulfilled by folates make them essential in all living organisms. Plants, being able to synthesize folates de novo, serve as an excellent dietary source of folates for animals that lack the respective biosynthetic pathway...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/28424129/hospital-characteristics-affect-consent-and-conversion-rates-for-potential-organ-donors
#14
Jawad T Ali, Aileen Ebadat, Danilo Martins, Sadia Ali, Shannon Horton, Thomas B Coopwood, Carlos V R Brown
Consent and conversion rates of potential organ donors in the United States need to be maximized to match the number of individuals awaiting organ donation. Studies to date have not focused on characteristics of centers with better outcomes. We performed an 8-year (2006-2014) retrospective study of our local organ procurement organization database. We categorized hospitals in our region as academic centers versus nonacademic centers, trauma centers versus nontrauma centers, and large (≥400 beds) centers versus small (<400 beds) centers...
April 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28423464/high-clinical-suspicion-of-donor-derived-disease-leads-to-timely-recognition-and-early-intervention-to-treat-solid-organ-transplant-transmitted-lymphocytic-choriomeningitis-virus
#15
Gagan Mathur, Kunal Yadav, Bradley Ford, Ilana J Schafer, Shridhar V Basavaraju, Barbara Knust, Wun-Ju Shieh, Sam Hill, Garret D Locke, Patricia Quinlisk, Shelley Brown, Ardith Gibbons, Deborah Cannon, Matthew Kuehnert, Stuart T Nichol, Pierre E Rollin, Ute Ströher, Rachel Miller
Despite careful donor screening, unexpected donor-derived infections continue to occur in organ transplant recipients (OTRs). Lymphocytic choriomeningitis virus (LCMV) is one such transplant-transmitted infection that in previous reports has resulted in a high mortality among the affected OTRs. We report a LCMV case cluster that occurred 3 weeks post-transplant in three OTRs who received allografts from a common organ donor in March 2013. Following confirmation of LCMV infection at Centers for Disease Control and Prevention, immunosuppression was promptly reduced and ribavirin and/or intravenous immunoglobulin therapy were initiated in OTRs...
April 19, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28423110/organ-donation-and-transplantation-in-mexico-a-transplantation-health-professionals%C3%A2-perspective
#16
Luis Eduardo Hernández-Ibarra, Francisco J Mercado-Martínez, Anabel Martínez-Castañeda
Objective: We aimed to explore organ donation and transplantation in Mexico from the point of view of transplantation health professionals. Materials and methods: A qualitative study was carried out. Twenty six organ transplantation health professionals from seven states of Mexico participated. Semi-structured face-to-face interviews were conducted mainly in hospital settings. Critical discourse analysis was performed. Results: According to participants, living organ transplantation offers benefits for recipients as well as for donors...
January 2017: Salud Pública de México
https://www.readbyqxmd.com/read/28422433/rigid-non-fullerene-acceptors-based-on-triptycene-perylene-dye-for-organic-solar-cells
#17
Dong Meng, Huiting Fu, Bingbing Fan, Jianqi Zhang, Yan Li, Yanming Sun, Zhaohui Wang
Three kinds of non-conjugated rigid perylene bisimide (PBI) derivatives based on a triptycene core were designed, synthesized and characterized. The unique three-dimensional (3D) conformation of triptycene could enable formation of polymer with the favorable morphology for organic polymer solar cells (PSCs) by relieving the self-aggregation of rigid PBI units. The low-lying LUMO energy levels of these compounds demonstrated that they are very suitable for using as acceptors in organic solar cells. A higher power conversion efficiency (PCE) of 6...
April 19, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28421681/early-clinical-xenotransplantation-experiences-an-interview-with-thomas-e-starzl-md-phd
#18
REVIEW
David K C Cooper
Dr Thomas E. Starzl, who died on March 4, 2017, was one of the great pioneers of organ transplantation. He was also a pioneer in the field of xenotransplantation. In 1964, he carried out baboon kidney transplants in six patients with terminal renal disease for whom no living or deceased donor became available; graft survival was for 19-60 days, the grafts being lost largely through continuous complement activation. Between 1966 and 1974, he carried out one ex vivo liver perfusion and three orthotopic liver transplants using chimpanzees as sources of organs; graft survival was for <14 days...
March 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28421196/synthesis-of-l-ascorbyl-flurbiprofenate-by-lipase-catalyzed-esterification-and-transesterification-reactions
#19
Jia-Ying Xin, Li-Rui Sun, Shu-Ming Chen, Yan Wang, Chun-Gu Xia
The synthesis of L-ascorbyl flurbiprofenate was achieved by esterification and transesterification in nonaqueous organic medium with Novozym 435 lipase as biocatalyst. The conversion was greatly influenced by the kinds of organic solvents, speed of agitation, catalyst loading amount, reaction time, and molar ratio of acyl donor to L-ascorbic acid. A series of solvents were investigated, and tert-butanol was found to be the most suitable from the standpoint of the substrate solubility and the conversion for both the esterification and transesterification...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28419684/should-organs-from-hepatitis-c-virus-infected-donors-be-used-for-transplantation-in-the-era-of-daas
#20
Hideki Ohdan
Hepatitis C virus (HCV) infection has been demonstrated to deleteriously impact both patient and graft survival following non-hepatic organ transplantation [1, 2]. Interferon (IFN)-based therapies prior to non-hepatic transplant in HCV-infected patients improved their survival, however, tolerability and low cure rates practically limited those therapies [3]. In addition, due to the risk of allograft rejection, IFN-based therapy following non-hepatic solid organ transplant is not generally recommended. This article is protected by copyright...
April 18, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
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