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https://www.readbyqxmd.com/read/28630495/the-solution-plasma-process-for-heteroatom-carbon-nanosheets-the-role-of-precursors
#1
Koangyong Hyun, Nagahiro Saito
The solution plasma process (SPP), known as non-equilibrium cold plasma at atmospheric pressure and room temperature, was used to investigate the synthesis of nitrogen-carbon nasnosheets (NCNs). To verify the effect of elementary composition and structure of N-methyl-2-pyrrolidone (NMP), various precursors were used in the SPP to synthesize NCNs via the bottom-up synthesis method for the first time. The NCNs were analyzed by transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28607668/future-perspectives-on-nonmedical-prescribing
#2
REVIEW
Derek Stewart, Tesnime Jebara, Scott Cunningham, Ahmed Awaisu, Abdulrouf Pallivalapila, Katie MacLure
Many countries have implemented nonmedical prescribing (NMP) and many others are scoping prescribing practices with a view to developing NMP. This paper provides a future perspective on NMP in light of findings of an umbrella review of aspects of NMP. This is followed by coverage of the Scottish Government strategy of pharmacist prescribing and finally, consideration of two key challenges. The review identified seven systematic reviews of influences on prescribing decision-making, processes of prescribing, and barriers and facilitators to implementation...
June 2017: Therapeutic Advances in Drug Safety
https://www.readbyqxmd.com/read/28605989/sinus-floor-augmentation-comparing-an-in-situ-hardening-biphasic-calcium-phosphate-ha-%C3%AE-tcp-bone-graft-substitute-with-a-particulate-biphasic-calcium-phosphate-ha-%C3%AE-tcp-bone-graft-substitute-an-experimental-study-in-sheep
#3
Angelika Wildburger, Vladimir Bubalo, Marton Magyar, Heiner Nagursky, Norbert Jakse, Rainer Schmelzeisen, Sebastian Sauerbier
OBJECTIVE: The aim of the present split-mouth study in sheep was to assess the influence of in situ hardening properties of a biphasic calcium phosphate bone graft substitute (ratio HA/β-TCP = 60/40) compared to a particulate bone graft substitute with the same biphasic core-granule composition without in situ hardening properties on sinus floor augmentation. MATERIAL AND METHODS: Therefore, bilateral sinus floor augmentation was performed in eight sheep. PLGA coated, in situ hardening biphasic bone graft substitute (PLGA-NMP-BCP) was placed into the test site and a particulate biphasic bone graft substitute without PLGA coating (BCP) was used for the contralateral site as a control...
June 12, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28605412/accuracy-profiles-for-analyzing-residual-solvents-in-textiles-by-gc-ms
#4
Qibei Bao, Kejie Fu, Qingqing Ren, Yingying Zhong, Dan Qian
Excess residual solvents (RSs) in clothes or other textiles could be toxic and pose risks to both humans and the environment. N,N-Dimethylformamide (DMF), N,N-dimethylacetamide (DMAc) and 1-methyl-2-pyrrolidinone (NMP) are important chemicals frequently used as solvents in the textile industry. Several organizations have proposed limiting DMF, DMAc and NMP in textiles, but an appropriate detection method has not been proposed. A sensitive GC-MS method for the quantification of DMF, DMAc and NMP in textiles was developed...
June 9, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28594183/the-opposite-effect-of-water-and-n-methyl-2-pyrrolidone-cosolvents-on-the-nanostructural-organization-of-ethylammoniumbutanoate-ionic-liquid-a-small-and-wide-angle-x-ray-scattering-and-molecular-dynamics-simulations-study
#5
Umme Salma, Natalia V Plechkova, Ruggero Caminiti, Lorenzo Gontrani
Two series of mixtures of ethylammonium butanoate (EAB, [N0 0 0 2][C3CO2]) in water and N-methyl-2-pyrrolidone (NMP) have been prepared at different molar fractions to assess the effect of these two polar solvents on the nanostructural order present in [N0 0 0 2][C3CO2]. The small and wide angle X-ray scattering (SWAXS) pattern of the liquid in neat state shows a pre-peak at Q = 0.513 Å 1, which is associated with the aggregation of nonpolar alkyl chains of both cations and anions. Interestingly, the two solvents affect the nanostructure of [N0 0 0 2][C3CO2] differently, though both are polar...
June 8, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28587232/fabrication-of-defect-free-cellulose-acetate-hollow-fibers-by-optimization-of-spinning-parameters
#6
Xuezhong He
Spinning of cellulose acetate (CA) with the additive polyvinylpyrrolidone (PVP) in N-methyl-2-pyrrolidone (NMP) solvent under different conditions was investigated. The spinning parameters of air gap, bore fluid composition, flow rate of bore fluid, and quench bath temperature were optimized based on the orthogonal experiment design (OED) method and multivariate analysis. FTIR and scanning electron microscopy were used to characterize the membrane structure and morphology. Based on the conjoint analysis in Statistical Product and Service Solutions (SPSS) software, the importance of these parameters was identified as: air gap > bore fluid composition > flow rate of bore fluid > quench bath temperature...
June 5, 2017: Membranes
https://www.readbyqxmd.com/read/28582606/2-2-6-6-tetramethylpiperydinyl-1-oxyl-tempo-functionalized-benzoxazines-prepared-with-a-one-pot-synthesis-for-reactive-crosslinkable-initiators-of-nitroxide-mediated-polymerization
#7
Yi-Jen Han, Ying-Ling Liu
In this work, the incorporation of a 2,2,6,6-tetramethylpiperydinyl-1-oxyl (TEMPO) group to a benzoxazine ring is performed using a one-pot synthesis for the preparation of TEMPO-functionalized benzoxazine compounds and polymers as reactive and crosslinkable initiators for nitroxide-mediated polymerization (NMP). The TEMPO-functionalization reaction of benzoxazine, traced with (1) H NMR, is conducted with sequential radical transfer and coupling reactions. Moreover, polystyrene-grafted polybenzoxazine copolymers are prepared with the TEMPO-benzoxazine initiator and NMP of styrene...
June 5, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28537714/enhanced-afterglow-performance-of-persistent-luminescence-implants-for-efficient-repeatable-photodynamic-therapy
#8
Wenpei Fan, Nan Lu, Can Xu, Yijing Liu, Jing Lin, Sheng Wang, Zheyu Shen, Zhen Yang, Junle Qu, Tianfu Wang, Siping Chen, Peng Huang, Xiaoyuan Chen
Persistent luminescence nanoparticles (PLNPs) have been used for bioimaging without autofluorescence background interference, but the poor afterglow performance impedes their further applications in cancer therapy. To overcome the Achilles' heel of PLNPs, herein we report the construction of injectable persistent luminescence implants (denoted as PL implants) as a built-in excitation source for efficient repeatable photodynamic therapy (PDT). The injectable ZGC (ZnGa1.996O4:Cr0.004) PL implants were prepared by dissolving ZGC PLNPs in poly(lactic-co-glycolic acid)/N-methylpyrrolidone oleosol, which demonstrated much stronger persistent luminescence (PersL) intensity and longer PersL lifetime than that of ZGC PLNPs both in vitro and in vivo...
May 26, 2017: ACS Nano
https://www.readbyqxmd.com/read/28534835/emulsion-based-intradermal-delivery-of-melittin-in-rats
#9
Sang Mi Han, Se Gun Kim, Sok Cheon Pak
Bee venom (BV) has long been used as a traditional medicine. The aim of the present study was to formulate a BV emulsion with good rheological properties for dermal application and investigate the effect of formulation on the permeation of melittin through dermatomed rat skin. A formulated emulsion containing 1% (w/v) BV was prepared. The emulsion was compared with distilled water (DW) and 25% (w/v) N-methyl-2-pyrrolidone (NMP) in DW. Permeation of melittin from aqueous solution through the dermatomed murine skin was evaluated using the Franz diffusion cells...
May 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28530536/leuprolide-acetate-release-study-from-%C3%AE-irradiated-plga-based-in-situ-forming-system
#10
Mona Shapourgan, Hamid Mobedi, Nasrin Sheikh, Aliasghar Behnamghader, Arezou Mashak
It is well known that the properties of polymers can be altered by exposure to γ- ray. γ-irradiation has been used as a sterilization method for biodegradable polymeric drug delivery devices, and its drug release profile must not be significantly changed. In this study, the effect of γ-irradiation with 8 kGy doses on the release profile of leuprolide acetate from PLGA-based in situ forming system was evaluated. PLGA-based in situ forming systems were prepared by injecting some specific amount of irradiated solution of PLGA /NMP containing drug into a buffer phosphate pH 7...
March 28, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28520579/the-use-of-an-acellular-oxygen-carrier-in-a-human-liver-model-of-normothermic-machine-perfusion
#11
Richard W Laing, Ricky H Bhogal, Lorraine Wallace, Yuri Boteon, Desley A H Neil, Amanda Smith, Barney T F Stephenson, Andrea Schlegel, Stefan G Hübscher, Darius F Mirza, Simon C Afford, Hynek Mergental
BACKGROUND: Normothermic machine perfusion of the liver (NMP-L) is a novel technique that preserves liver grafts under near-physiological conditions whilst maintaining their normal metabolic activity. This process requires an adequate oxygen supply, typically delivered by packed red blood cells (RBC). We present the first experience using an acellular hemoglobin-based oxygen carrier (HBOC) Hemopure in a human model of NMP-L. METHODS: Five discarded high-risk human livers were perfused with HBOC-based perfusion fluid and matched to 5 RBC-perfused livers...
May 18, 2017: Transplantation
https://www.readbyqxmd.com/read/28490879/methodological-assessment-of-the-reduction-of-the-content-of-impurities-in-nimodipine-emulsion-via-the-use-of-21-amino-acid-protection
#12
Yiqiao Xie, Zhiquan Zhuang, Shu Zhang, Zihua Xia, De Chen, Kaiyan Fan, Jialin Ren, CuiCui Lin, Yanzhong Chen, Fan Yang
PURPOSE: The present study examined the factors affecting the content of impurities of nimodipine (NMP) emulsion and the associated methods of compound protection. METHODS: Destructive testing of NMP emulsion and its active pharmaceutical ingredient (API) were conducted, and ultracentrifugation was used to study the content of impurities in two phases. The impurity of NMP was measured under different potential of hydrogen (pH) conditions, antioxidants and pH-adjusting agents...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28483273/ex-vivo-machine-perfusion-for-renal-graft-preservation
#13
REVIEW
J Moritz Kaths, Andreas Paul, Lisa A Robinson, Markus Selzner
Kidney transplantation is the treatment of choice for end-stage renal disease. Despite its superiority over dialysis, the persisting organ shortage remains a major drawback. Additional sources to increase the donor pool are grafts recovered from extended criteria donors (ECD) and donation after circulatory death (DCD). Although transplantation of marginal grafts demonstrates promising outcomes, increased rates of primary non-function, delayed graft function, and reduced graft survival have been reported. Cold ischemic injury, caused by static cold storage is a significant risk factor for poor outcome...
April 26, 2017: Transplantation Reviews
https://www.readbyqxmd.com/read/28457792/a-gene-regulatory-network-balances-neural-and-mesoderm-specification-during-vertebrate-trunk-development
#14
Mina Gouti, Julien Delile, Despina Stamataki, Filip J Wymeersch, Yali Huang, Jens Kleinjung, Valerie Wilson, James Briscoe
Transcriptional networks, regulated by extracellular signals, control cell fate decisions and determine the size and composition of developing tissues. One example is the network controlling bipotent neuromesodermal progenitors (NMPs) that fuel embryo elongation by generating spinal cord and trunk mesoderm tissue. Here, we use single-cell transcriptomics to identify the molecular signature of NMPs and reverse engineer the mechanism that regulates their differentiation. Together with genetic perturbations, this reveals a transcriptional network that integrates opposing retinoic acid (RA) and Wnt signals to determine the rate at which cells enter and exit the NMP state...
May 8, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28457381/salvage-of-an-octogenarian-liver-graft-using-normothermic-perfusion-a-case-report
#15
D Pezzati, D Ghinolfi, E Balzano, P De Simone, L Coletti, N Roffi, E Rreka, L Meacci, D Campani, A Mazzoni, A Paolicchi, L Caponi, P Marchetti, L Marselli, F Filipponi
Liver transplantation with very old donors is safe, but is associated with an increased incidence of ischemic-type biliary lesions and delayed graft function. Normothermic machine perfusion (NMP) is a novel technique for preservation of liver grafts and has the potential to reduce ischemia-reperfusion injury. A case is reported here of a liver transplantation (LT) with a graft from an 83-year-old brain-dead donor. Procurement was with dual perfusion and en bloc, modified fast technique. Donor kidneys were not transplanted due to severe atherosclerosis and poor perfusion...
May 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28442734/sonochemical-synthesis-of-pyrido-2-3-d-6-5-d-dipyrimidines-catalyzed-by-hnmp-hso4-and-their-antimicrobial-activity-studies
#16
Hossein Naeimi, Asieh Didar, Zahra Rashid, Zohreh Zahraie
In this study, the one-pot four-component reaction of aromatic aldehyde, 2-thiobarbituric acid, ammonium acetate in the presence of a catalytic amount of [H-NMP](+)[HSO4](-) under ultrasonic irradiation in water is reported. In the present procedure, the pyrido[2,3-d:6,5-d']dipyrimidine derivatives were purely produced as valuable products. The process proved to be simple, environmentally friendly, efficient and high to excellent yielding. Moreover, some of the synthetic compounds were investigated and revealed important antimicrobial activity of prepared products...
April 26, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28414978/investigation-on-the-relationship-between-solubility-of-artemisinin-and-polyvinylpyrroli-done-addition-by-using-daosd-approach
#17
Jin Zhang, Ran Guo, Anqi He, Shifu Weng, Xiuxiang Gao, Yizhuang Xu, Isao Noda, Jinguang Wu
In this work, we investigated the influence of polyvinylpyrrolidone (PVP) on the solubility of artemisinin in aqueous solution by using quantitative (1)H NMR. Experimental results demonstrate that about 4 times of incremental increase occurs on the solubility of artemisinin upon introducing PVP. In addition, dipole-dipole interaction between the ester group of artemisinin and the amide group of N-methylpyrrolidone (NMP), a model compound of PVP, is characterized by two-dimensional (2D) correlation FTIR spectroscopy with the DAOSD (Double Asynchronous Orthogonal Sample Design) approach developed in our previous work...
July 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28412618/untapped-potentials-of-acrylonitrile-butadiene-styrene-polyurethane-abs-pu-blend-membrane-to-purify-dye-wastewater
#18
Mansoor Mandegari, Hossein Fashandi
Production of acrylonitrile-butadiene-styrene/polyurethane (ABS/PU) blend membrane with high rejection efficiency for disperse and vat dyes, is introduced as a facile and cost effective technique to purify textile wastewater. In this respect, membranes are produced using commercially available polymers, i.e. ABS and PU, with different compositions (ABS/PU: 100/0, 80/20, 70/30, 60/40 and 50/50 w/w) through wet casting. Casting solutions with concentration of 30 wt% are prepared using two different solvents, i...
April 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28399372/a-tobramycin-vector-enhances-synergy-and-efficacy-of-efflux-pump-inhibitors-against-multidrug-resistant-gram-negative-bacteria
#19
Xuan Yang, Sudeep Goswami, Bala Kishan Gorityala, Ronald Domalaon, Yinfeng Lyu, Ayush Kumar, George G Zhanel, Frank Schweizer
Drug efflux mechanisms interact synergistically with the outer membrane permeability barrier of Gram-negative bacteria, leading to intrinsic resistance that presents a major challenge for antibiotic drug development. Efflux pump inhibitors (EPIs) which block the efflux of antibiotics synergize antibiotics, but the clinical development of EPI/antibiotic combination therapy to treat multidrug-resistant (MDR) Gram-negative infections has been challenging. This is in part caused by the inefficiency of current EPIs to penetrate the outer membrane and resist efflux...
May 11, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28379173/effects-of-phase-separation-behavior-on-morphology-and-performance-of-polycarbonate-membranes
#20
Alamin Idris, Zakaria Man, Abdulhalim S Maulud, Muhammad Saad Khan
The phase separation behavior of bisphenol-A-polycarbonate (PC), dissolved in N-methyl-2-pyrrolidone and dichloromethane solvents in coagulant water, was studied by the cloud point method. The respective cloud point data were determined by titration against water at room temperature and the characteristic binodal curves for the ternary systems were plotted. Further, the physical properties such as viscosity, refractive index, and density of the solution were measured. The critical polymer concentrations were determined from the viscosity measurements...
April 5, 2017: Membranes
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