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https://www.readbyqxmd.com/read/28726896/cycloaddition-reactions-of-enoldiazo-compounds
#1
REVIEW
Qing-Qing Cheng, Yongming Deng, Marianne Lankelma, Michael P Doyle
Enoldiazo esters and amides have proven to be versatile reagents for cycloaddition reactions that allow highly efficient construction of various carbocycles and heterocycles. Their versatility is exemplified by (1) [2+n]-cycloadditions (n = 3, 4) by the enol silyl ether units of enoldiazo compounds with retention of the diazo functionality to furnish α-cyclic-α-diazo compounds that are themselves subject to further transformations of the diazo functional group; (2) [3+n]-cycloadditions (n = 1-5) by metallo-enolcarbenes formed by catalytic dinitrogen extrusion from enoldiazo compounds; (3) [2+n]-cycloadditions (n = 3, 4) by donor-acceptor cyclopropenes generated in situ from enoldiazo compounds that produce cyclopropane-fused ring systems...
July 20, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28726521/polymer-donors-of-nitric-oxide-improve-the-treatment-of-experimental-solid-tumours-with-nanosized-polymer-therapeutics
#2
Milada Šírová, Veronika Horková, Tomáš Etrych, Petr Chytil, Blanka Říhová, Martin Studenovský
Polymer carriers based on N-(2-hydroxypropyl)methacrylamide (HPMA) copolymers with incorporated organic nitrates as nitric oxide (NO) donors were designed with the aim to localize NO generation in solid tumours, thus highly increasing the enhanced permeability and retention (EPR) effect. The NO donors were coupled to the polymer carrier either through a stable bond or through a hydrolytically degradable, pH sensitive, bond. In vivo, the co-administration of the polymer NO donor and HPMA copolymer-bound cytotoxic drug (doxorubicin; Dox) resulted in an improvement in the treatment of murine EL4 T-cell lymphoma...
July 20, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28720788/preservative-solution-that-stabilizes-erythrocyte-morphology-and-leukocyte-viability-under-ambient-conditions
#3
Rebecca D Sandlin, Keith H K Wong, Leo Boneschansker, Thomas R Carey, Kathleen L Miller, Gregory Rose, Daniel A Haber, Shyamala Maheswaran, Daniel Irimia, Shannon L Stott, Mehmet Toner
The deterioration of whole blood ex vivo represents a logistical hurdle in clinical and research settings. Here, a cocktail preservative is described that stabilizes leukocyte viability and erythrocyte morphology in whole blood under ambient storage. Neutrophil biostabilization was explored using a sophisticated microfluidic assay to examine the effectiveness of caspase inhibition to stabilize purified neutrophils. Following 72 h ambient storage, neutrophils remained fully functional to migrate towards chemical cues and maintained their ability to undergo NETosis after stimulation...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28702909/lignocellulosic-biowastes-as-carrier-material-and-slow-release-electron-donor-for-sulphidogenesis-of-wastewater-in-an-inverse-fluidized-bed-bioreactor
#4
Luis C Reyes-Alvarado, Álvaro Camarillo-Gamboa, Elena Rustrian, Eldon R Rene, Giovanni Esposito, Piet N L Lens, Eric Houbron
Industrial wastewaters containing high concentrations of sulphate, such as those generated by mining, metallurgical and mineral processing industries, require electron donor for biological sulfidogenesis. In this study, five types of lignocellulosic biowastes were characterized as potential low-cost slow release electron donors for application in a continuously operated sulphidogenic inverse fluidized bed bioreactor (IFBB). Among them, natural scourer and cork were selected due to their high composition of volatile solids (VS), viz...
July 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28687348/design-and-approach-of-the-living-organ-video-educated-donors-loved-program-to-promote-living-kidney-donation-in-african-americans
#5
John C Sieverdes, Matthew Price, Kenneth J Ruggiero, Prabhakar K Baliga, Kenneth D Chavin, Brenda Brunner-Jackson, Sachin Patel, Frank A Treiber
PURPOSE: To describe the rationale, methodology, design, and interventional approach of a mobile health education program designed for African Americans with end stage renal disease (ESRD) to increase knowledge and self-efficacy to approach others about their need for a living donor kidney transplant (LDKT). METHODS: The Living Organ Video Educated Donors (LOVED) program is a theory-guided iterative designed, mixed methods study incorporating three phases: 1) a formative evaluation using focus groups to develop program content and approach; 2) a 2-month proof of concept trial (n=27) to primarily investigate acceptability, tolerability and investigate increases of LDKT knowledge and self-efficacy; and 3) a 6-month, 2-arm, 60-person feasibility randomized control trial (RCT) to primarily investigate increases in LDKT knowledge and self-efficacy, and secondarily, to increases the number of living donor inquiries, medical evaluations, and LDKTs...
July 4, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28686151/individual-contextual-and-network-characteristics-of-blood-donors-and-non-donors-a-systematic-review-of-recent-literature
#6
REVIEW
Tjeerd W Piersma, René Bekkers, Elisabeth F Klinkenberg, Wim L A M De Kort, Eva-Maria Merz
BACKGROUND: The ageing population and recent migration flows may negatively affect the blood supply in the long term, increasing the importance of targeted recruitment and retention strategies to address donors. This review sought to identify individual, network and contextual characteristics related to blood donor status and behaviour, to systematically discuss differences between study results, and to identify possible factors to target in recruitment and retention efforts. METHODS: The systematic review was conducted in accordance with a predefined PROSPERO protocol (CRD42016039591)...
June 13, 2017: Blood Transfusion, Trasfusione del Sangue
https://www.readbyqxmd.com/read/28677305/reasons-to-end-the-donor-career-a-quantitative-study-among-stopped-blood-donors-in-the-netherlands
#7
E F Klinkenberg, B Romeijn, W L de Kort, E-M Merz
BACKGROUND AND OBJECTIVES: Previous work has studied barriers to donating blood or plasma among current, lapsed and non-donors. Still, it remains unclear why donors stop donating and end their donor career voluntarily. A thorough understanding of why donors stop is necessary to develop more effective retention strategies and manage the decline in whole-blood donors. METHODS: An online questionnaire that contained questions about reasons to stop donation was sent out to 7098 Dutch whole-blood donors who deregistered from the donor pool in 2015 but who were not permanently deferred for medical reasons (response: N = 2490, 35%)...
July 5, 2017: Transfusion Medicine
https://www.readbyqxmd.com/read/28671277/a-motivational-interview-promotes-retention-of-blood-donors-with-high-internal-motivation
#8
Christopher R France, Janis L France, Bruce W Carlson, Lina K Himawan, Debra A Kessler, Mark Rebosa, Beth H Shaz, Katrala Madden, Patricia M Carey, P Maxwell Slepian, Brett Ankawi, Irina E Livitz, Kristen R Fox
BACKGROUND: Based on the hypothesis that self-determined motivation is associated with an increased likelihood of future behavior, the present study examined the ability of a motivational interview to promote internal motivation for giving blood and future donation attempts. STUDY DESIGN AND METHODS: A sample of 484 recent whole-blood and double red blood cell donors (62.4% female; age = 30.2 ± 11.8 years) were randomly assigned to either a telephone-delivered motivational interview or a control call approximately 6 weeks after donating...
July 3, 2017: Transfusion
https://www.readbyqxmd.com/read/28653776/can-inactive-blood-donors-be-re-recruited-a-stratified-randomised-pilot-study
#9
J Ou-Yang, B He, X Rong, C-H Bei
OBJECTIVE: The aim of this study was to evaluate the effectiveness of recruitment of inactive donors by telephone call and cell phone short message service (SMS), to assess the causes of donor self-deferral and to determine the appropriate sample size for a formal study BACKGROUND: Blood donor retention is essential for sustaining blood safety and sufficiency. METHODS: We conducted a single-centre open-label parallel randomised controlled trial in Guangzhou, China...
June 27, 2017: Transfusion Medicine
https://www.readbyqxmd.com/read/28593170/increased-detrusor-collagen-is-associated-with-detrusor-overactivity-and-decreased-bladder-compliance-in-men-with-benign-prostatic-obstruction
#10
Carlos H S Bellucci, Wesley de O Ribeiro, Thiago S Hemerly, José de Bessa, Alberto A Antunes, Katia R M Leite, Homero Bruschini, Miguel Srougi, Cristiano M Gomes
BACKGROUND: This study aimed to investigate the relationship between detrusor collagen content and urodynamic parameters in men with benign prostatic obstruction. MATERIAL AND METHODS: Nineteen consecutive patients undergoing open prostatectomy for bladder outlet obstruction (BOO) due to benign prostatic hyperplasia (BPH) were evaluated. Urodynamic tests were performed in all patients. BOO and detrusor contractility were assessed with the BOO index (BOOI) and the bladder contractility index (BCI), respectively...
June 2017: Prostate International
https://www.readbyqxmd.com/read/28592769/thrombotic-complications-after-hematopoietic-stem-cell-transplantation
#11
Shosaku Nomura
Hematopoietic stem cell transplantation (HSCT) involves some serious transplant-associated complications (TACs) or vascular disorders, such as veno-occlusive disease (VOD), thrombotic microangiopathy (TMA), and graft-versus-host disease (GVHD). VOD is related to a clinical syndrome characterized by tender hepatomegaly, jaundice, fluid retention, and unexplained weight gain. When TMA is described in patients who have undergone HSCT, it is often implied that the clinical diagnosis of TMA is similar to that of thrombotic thrombocytopenic purpura...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28587616/a-double-blind-randomised-controlled-investigation-into-the-efficacy-of-mirococept-apt070-for-preventing-ischaemia-reperfusion-injury-in-the-kidney-allograft-empirikal-study-protocol-for-a-randomised-controlled-trial
#12
Theodoros Kassimatis, Anass Qasem, Abdel Douiri, Elizabeth G Ryan, Irene Rebollo-Mesa, Laura L Nichols, Roseanna Greenlaw, Jonathon Olsburgh, Richard A Smith, Steven H Sacks, Martin Drage
BACKGROUND: Delayed graft function (DGF) is traditionally defined as the requirement for dialysis during the first week after transplantation. DGF is a common complication of renal transplantation, and it negatively affects short- and long-term graft outcomes. Ischaemia reperfusion injury (IRI) is a prime contributor to the development of DGF. It is well established that complement system activation plays a pivotal role in the pathogenesis of IRI. Mirococept is a highly effective complement inhibitor that can be administered ex vivo to the donor kidney just before transplantation...
June 6, 2017: Trials
https://www.readbyqxmd.com/read/28579846/analysis-of-blood-donor-pre-donation-deferral-in-dubai-characteristics-and-reasons
#13
Laila Al Shaer, Ranjita Sharma, Mahera AbdulRahman
BACKGROUND: To ensure an adequate and safe blood supply, it is crucial to select suitable donors according to stringent eligibility criteria. Understanding the reasons for donor deferral can help in planning more efficient recruitment strategies and evaluating donor selection criteria. This study aims to define donor pre-donation deferral rates, causes of deferral, and characteristics of deferred donors in Dubai. MATERIALS AND METHODS: This retrospective study was conducted on all donors who presented for allogeneic blood donation between January 1, 2010, until June 30, 2013, in Dubai Blood Donation Centre, accredited by the American Association of Blood Banks...
2017: Journal of Blood Medicine
https://www.readbyqxmd.com/read/28547567/effects-of-electron-acceptors-on-sulphate-reduction-activity-in-activated-sludge-processes
#14
Francisco Rubio-Rincón, Carlos Lopez-Vazquez, Laurens Welles, Tessa van den Brand, Ben Abbas, Mark van Loosdrecht, Damir Brdjanovic
The concentration of sulphate present in wastewater can vary from 10 to 500 mg SO4(2-)/L. During anaerobic conditions, sulphate is reduced to sulphide by sulphate-reducing bacteria (SRB). Sulphide generation is undesired in wastewater treatment plants (WWTPs). Previous research indicated that SRB are inhibited by the presence of electron acceptors (such as O2, NO3 and NO2). However, the contact times and concentrations used in those studies are by far higher than occur in WWTPs. Since sulphide can influence the biological nitrogen and phosphorus removal processes, this research aimed to understand how the different electron acceptors commonly present in biological nutrient removal (BNR) systems can affect the proliferation of SRB...
May 25, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28544987/a-high-efficiency-denitrification-bioreactor-for-the-treatment-of-acrylonitrile-wastewater-using-waterborne-polyurethane-immobilized-activated-sludge
#15
Honghong Dong, Wei Wang, Zhaozheng Song, Hao Dong, Jianfeng Wang, Shanshan Sun, Zhongzhi Zhang, Ming Ke, Zhenjia Zhang, Wei-Min Wu, Guangqing Zhang, Jie Ma
The performance of a laboratory-scale, high-efficiency denitrification bioreactor (15L) using activated sludge immobilized by waterborne polyurethane in treating acrylonitrile wastewater with high concentration of nitrate nitrogen (249mg/L) was investigated. The bioreactor was operated at 30°C for 220days. Batch denitrification experiments showed that the optimal operation parameters were C/NO3(-)-N molar ratio of 2.0 using sodium acetate as electron donor and carrier filling rate of 20% (V/V) in the bioreactor...
September 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28542841/blood-donors-perceptions-motivators-and-deterrents-in-sub-saharan-africa-a-scoping-review-of-evidence
#16
REVIEW
Lucy Asamoah-Akuoko, Oliver W Hassall, Imelda Bates, Henrik Ullum
Achieving an adequate blood supply in Sub-Saharan Africa (SSA) through donor mobilization and retention is crucial. Factors that motivate or deter blood donors vary according to beliefs and social norms. Understanding the factors that influence blood donation behaviour in SSA is vital to developing effective strategies to address blood donor motivation and retention. This review of 35 studies from 16 SSA countries collates available evidence concerning the perceptions, motivators and deterrents that influence blood donors in SSA...
June 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28525753/the-u6-snrna-m-6-a-methyltransferase-mettl16-regulates-sam-synthetase-intron-retention
#17
Kathryn E Pendleton, Beibei Chen, Kuanqing Liu, Olga V Hunter, Yang Xie, Benjamin P Tu, Nicholas K Conrad
Maintenance of proper levels of the methyl donor S-adenosylmethionine (SAM) is critical for a wide variety of biological processes. We demonstrate that the N(6)-adenosine methyltransferase METTL16 regulates expression of human MAT2A, which encodes the SAM synthetase expressed in most cells. Upon SAM depletion by methionine starvation, cells induce MAT2A expression by enhanced splicing of a retained intron. Induction requires METTL16 and its methylation substrate, a vertebrate conserved hairpin (hp1) in the MAT2A 3' UTR...
May 18, 2017: Cell
https://www.readbyqxmd.com/read/28508423/oxoborane-rbo-complexation-and-concomitant-electrophilic-bond-activation-processes
#18
Anindya K Swarnakar, Christian Hering-Junghans, Michael J Ferguson, Robert McDonald, Eric Rivard
Donor-acceptor complexes of the oxoboranes ClB=O and HOB=O were synthesized and each feature short multiply bonded B=O linkages. The retention of high Lewis acidic character within these encapsulated monomeric oxoboranes was manifested by their ability to support C-F and Si-O bond activation/functionalization. The reported ClB=O complexes can be regarded as synthetic surrogates of the [BO](+) cation, an inorganic analogue of CO.
May 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28474337/impact-of-predictive-scoring-model-and-e-mail-messages-on-african-american-blood-donors
#19
Lohith S Bachegowda, Brad Timm, Pinaki Dasgupta, Christopher D Hillyer, Debra Kessler, Mark Rebosa, Christopher R France, Beth H Shaz
BACKGROUND: Expanding the African American (AA) donor pool is critical to sustain transfusion support for sickle cell disease patients. STUDY DESIGN AND METHODS: The aims were to: 1) apply cognitive computing on donation related metrics to develop a predictive model that effectively identifies repeat AA donors, 2) determine whether a single e-mail communication could improve AA donor retention and compare retention results on higher versus lower predictive score donors, and 3) evaluate the effect of e-mail marketing on AA donor retention with culturally versus nonculturally tailored message...
May 5, 2017: Transfusion
https://www.readbyqxmd.com/read/28467674/evaluation-of-a-mixed-anionic-nonionic-surfactant-modified-eggshell-membrane-as-an-advantageous-adsorbent-for-the-solid-phase-extraction-of-sudan-i-iv-as-model-analytes
#20
Ying Li, Anyi Wang, Yunfei Bai, Shiping Wang
The coadsorption of mixed anionic-nonionic surfactants, sodium dodecylbenzenesulfonate with Triton X-100, on the surface of eggshell membrane was investigated based on adsorption isotherms to improve the solid-phase extraction performance of eggshell membrane toward organic contaminants. Results showed that even though excess Triton X-100 might inhibit the adsorption of sodium dodecylbenzenesulfonate, a low dosage of Triton X-100 can significantly improve sodium dodecylbenzenesulfonate modification and enhance the extraction efficiency of eggshell membrane from 73...
May 3, 2017: Journal of Separation Science
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