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https://www.readbyqxmd.com/read/28335243/correlation-between-cdse-qd-synthesis-post-synthetic-treatment-and-bhj-hybrid-solar-cell-performance
#1
Michael Eck, Michael Krueger
In this publication we show that the procedure to synthesize nanocrystals and the post-synthetic nanocrystal ligand sphere treatment have a great influence not only on the immediate performance of hybrid bulk heterojunction solar cells, but also on their thermal, long-term, and air stability. We herein demonstrate this for the particular case of spherical CdSe nanocrystals, post-synthetically treated with a hexanoic acid based treatment. We observe an influence from the duration of this post-synthetic treatment on the nanocrystal ligand sphere size, and also on the solar cell performance...
June 14, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334985/multicriteria-optimization-methodology-in-stability-indicating-method-development-of-cilazapril-and-hydrochlorothiazide
#2
Jasmina Šljivic, Ana Protic, Biljana Otaševic, Jelena Golubovic, Mira Zecevic, Jovana Krmar
Multicriteria optimization methodology was applied in development of UHPLC-UV-MS method for separation of cilazapril, hydrochlorothiazide and their degradation products. This method is also applicable for analysis of cilazapril, hydrochlorothiazide and their degradation products in combined tablet formulation. Prior to method optimization forced degradation studies were conducted. Cilazapril and hydrochlorothiazide were subjected to acidic (0.1, 0.5 and 1.0 M HCl), basic (0.1, 0.5 and 1.0 M NaOH), thermal (70°C), oxidative (3-30% H2O2) degradation and photodegradation (day light)...
March 17, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28332252/functional-organic-material-for-roxarsone-and-its-derivatives-recognition-via-molecular-imprinting
#3
Weigang Fan, Xuemin Zhang, Yagang Zhang, Penglei Wang, Letao Zhang, Zhaoming Yin, Jun Yao, Wei Xiang
Roxarsone, one of feed add drugs containing arsenic, has been most widely used in poultry and swine industry. Roxarsone discharged into the environment has caused serious pollution problem. Herein, a reusable functional material for selective recognition and adsorption of roxarsone and its derivatives were designed and synthesized. The interaction mechanism is based on acid-base interaction and surface molecular imprinting. Dual functionalized core-shell structure with silica gel as the core was prepared to use as carrier for surface molecularly imprinted polymers...
March 22, 2017: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/28330727/evaluation-of-bam-butorphanol-azaperone-medetomidine-in-captive-african-lion-panthera-leo-immobilization
#4
Aleksandr Semjonov, Vladimir Andrianov, Jacobus P Raath, Toomas Orro, Derik Venter, Liesel Laubscher, Silke Pfitzer
OBJECTIVE: The combination of butorphanol, azaperone and medetomidine (BAM) with subsequent antagonism by naltrexone-yohimbine or naltrexone-atipamezole was evaluated for reversible immobilization of captive African lions (Panthea leo). STUDY DESIGN: Prospective, clinical trial. ANIMALS: Twenty lions, 11 males and nine females, weighing 38-284 kg were immobilized in South Africa. METHODS: The BAM volume dose rate administered was 0...
February 8, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28329693/lanthanide-integrated-supramolecular-polymeric-nanoassembly-with-multiple-regulation-characteristics-for-multidrug-resistant-cancer-therapy
#5
Weihong Jin, Qiwen Wang, Min Wu, Yang Li, Guping Tang, Yuan Ping, Paul K Chu
Cancer treatment can in principle be enhanced by the synergistic effects of chemo- and nucleic acid-based combination therapies but the lack of efficient drug nanocarriers and occurrence of multidrug resistance (MDR) are major obstacles adversely affecting the effectiveness. Herein, a lanthanide-integrated supramolecular polymeric nanoassembly that delivers anticancer drugs and siRNA for more effective cancer therapy is described. This nanotherapeutic system is prepared by loading adamantane-modified doxorubicin (Dox) into polyethylenimine-crosslinked-γ-cyclodextrin (PC) through the supramolecular assembly to form the interior Dox-loaded PC (PCD) followed by electrostatically driven self-assembly of siRNA and PCD to produce the PCD/siRNA nanocomplexes...
March 16, 2017: Biomaterials
https://www.readbyqxmd.com/read/28328174/a-strategy-to-design-hyperpolarized-%C3%A2-%C3%A2-c-magnetic-resonance-probes-using-1-%C3%A2-%C3%A2-c-%C3%AE-amino-acid-as-a-scaffold-structure
#6
Tatsuya Nishihara, Yutaka Kameyama, Hiroshi Nonaka, Yoichi Takakusagi, Fuminori Hyodo, Kazuhiro Ichikawa, Shinsuke Sando
Hyperpolarization is an emerging method that dramatically enhances NMR signal intensity. As a result of the increased sensitivity, hyperpolarized (HP) NMR molecular probes can be used to perform time-resolved spectroscopy and imaging in vitro and in vivo. It is however challenging to design such probes de novo. We herein report the [1-¹³C]α-amino acid as a scaffold structure to design HP ¹³C NMR molecular probe. The [1-¹³C]α-amino acid can be converted to various HP ¹³C chemical probes that show sufficient chemical shift change by altering the chemical state of α-nitrogen upon the interaction with the target...
March 22, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28325295/aptamers-for-cd-antigens-from-cell-profiling-to-activity-modulation
#7
REVIEW
Amin Nozari, Maxim V Berezovski
Nucleic acid-based aptamers are considered to be a promising alternative to antibodies because of their strong and specific binding to diverse targets, fast and inexpensive chemical synthesis, and easy labeling with a fluorescent dye or therapeutic agent. Cluster of differentiation (CD) proteins are among the most popular antigens for aptamers on the cell surface. These anti-CD aptamers could be used in cell biology and biomedicine, from simple cell phenotyping by flow cytometry or fluorescent microscopy to diagnosis and treatment of HIV/AIDS to cancer and immune therapies...
March 17, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28323415/facile-access-to-multi-sensitive-and-self-healing-hydrogels-with-reversible-and-dynamic-boronic-ester-and-disulfide-linkages
#8
Ruiwei Guo, Qian Su, Jinwei Zhang, Anjie Dong, Cunguo Lin, Jianhua Zhang
Multifunctional and multi-responsive hydrogels have presented a promising platform to design and fabricate smart devices for application in a wide variety of fields. However, their preparations often involve multistep preparation of multi-responsive polymer precursors, tedious reactions to introduce functional groups or sophisticated molecular designs. In this work, a multifunctional boronic acid-based crosslinker bis(phenylboronic acid carbamoyl) cystamine (BPBAC) was readily prepared from inexpensive commercially available 3-carboxylphenylboronic acid (CPBA) and cystamine dihydrochloride, which has the ability to crosslink the cis-diols and catechol-containing hydrophilic polymers to form hydrogels...
March 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28323073/dietary-electrolyte-balance-affects-growth-performance-amylase-activity-and-metabolic-response-in-the-meagre-argyrosomus-regius
#9
Leonardo J Magnoni, Emilio Salas-Leiton, Maria-João Peixoto, Luis Pereira, Francisca Silva-Brito, Filipa Fontinha, José F M Gonçalves, Jonathan M Wilson, Johan W Schrama, Rodrigo O A Ozório
Dietary ion content is known to alter the acid-base balance in freshwater fish. The current study investigated the metabolic impact of acid-base disturbances produced by differences in dietary electrolyte balance (DEB) in the meagre (Argyrosomus regius), an euryhaline species. Changes in fish performance, gastric chyme characteristics, pH and ion concentrations in the bloodstream, digestive enzyme activities and metabolic rates were analyzed in meagre fed ad libitum two experimental diets (DEB 200 or DEB 700mEq/kg) differing in the Na2CO3 content for 69days...
March 16, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28322687/correction-altered-mental-status-and-an-acid-base-disturbance
#10
Shylaja Mani, Gregory W Rutecki
In the article "A patient with altered mental status and an acid-base disturbance" (Mani S, Rutecki GW, Cleve Clin J Med 2017; 84:27-34), 2 errors occurred in Table 2. The corrected table appears with corrections shown in red. In addition, two sentences in the text regarding the osmol gap should be revised as follows: On page 31, the last 3 lines should read as follows: "When the anion gap metabolic acidosis is multifactorial, as it was suspected to be in a case reported by Tan et al,(23) the osmol gap may be elevated as a consequence of additional toxic ingestions, as it was in the reported patient...
March 2017: Cleveland Clinic Journal of Medicine
https://www.readbyqxmd.com/read/28322107/surface-modulation-of-polymeric-nanocarriers-enhances-the-stability-and-delivery-of-proteins-and-small-molecules
#11
Zohreh Amoozgar, Michael S Goldberg
AIM: We aimed to enhance the stability and therapeutic efficiency of protein-based therapeutic formulations. MATERIALS & METHODS: Proteins were immobilized on the surface of nanoparticles (NPs) to improve both protein stability and protein function, especially enzymatic activity. The modularity of the platform was demonstrated by coating proteins of varied molecular weights and functionalities on the surface of poly(lactic-co-glycolic acid)-based NPs. RESULTS: Coating proteins to the particle surface greatly enhanced the stability of the NPs, preventing particle aggregation and improving enzymatic potency, including in vivo...
March 21, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28319500/clinical-response-profile-of-metastatic-advanced-pulmonary-neuroendocrine-tumors-to-peptide-receptor-radionuclide-therapy-with-177lu-dotatate
#12
Rahul V Parghane, Sanjay Talole, Kumar Prabhash, Sandip Basu
OBJECTIVES: The aims of this study were to perform multiparametric response assessment of metastatic/advanced pulmonary neuroendocrine tumors (NETs) to Lu-DOTATATE peptide receptor radionuclide therapy (PRRT) (clinical, biochemical, molecular/structural imaging, and survival assessment) and to study the relationship between response, mortality, and overall survival with dual-tracer molecular imaging parameters. METHODS: Twenty-two patients (6 women, 16 men; median age, 44 years; range, 16-72 years) of histopathologically proven pulmonary NETs with metastatic/advanced disease were included and analyzed retrospectively...
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28319329/extracellular-acidosis-and-very-low-na-inhibit-nbcn1-and-nhe1-mediated-net-acid-extrusion-from-mouse-vascular-smooth-muscle-cells
#13
Lisbeth Bonde, Ebbe Boedtkjer
AIM: The electroneutral Na(+) ,HCO3(-) -cotransporter NBCn1 and Na(+) /H(+) -exchanger NHE1 regulate acid-base balance in vascular smooth muscle cells (VSMCs) and modify artery function and structure. Pathological conditions-notably ischemia-can dramatically perturb intracellular (i) and extracellular (o) pH and [Na(+) ]. We examined effects of low [Na(+) ]o and pHo on NBCn1 and NHE1 activity in VSMCs of small arteries. METHODS: We measured pHi by 2',7'-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein-based fluorescence microscopy of mouse mesenteric arteries and induced intracellular acidification by NH4(+) -prepulse technique...
March 20, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28319126/effects-of-sevoflurane-and-clonidine-on-acid-base-status-and-long-term-emotional-and-cognitive-outcomes-in-spontaneously-breathing-rat-pups
#14
Nicole Almenrader, Paola Colucci, Valentina De Castro, Daniela Valeri, Maura Palmery, Viviana Trezza, Patrizia Campolongo
BACKGROUND: Numerous experiments in rodents suggest a causative link between exposure to general anaesthetics during brain growth spurt and poor long-lasting neurological outcomes. Many of these studies have been questioned with regard of their translational value, mainly because of extremely long anaesthesia exposure. Therefore, the aim of the present study was to assess the impact of a short sevoflurane anaesthesia, alone or combined with clonidine treatment, on respiratory function in spontaneously breathing rat pups and overall effects on long-lasting emotional and cognitive functions...
2017: PloS One
https://www.readbyqxmd.com/read/28318362/carbonic-anhydrase-inhibitors-modify-intracellular-ph-transients-and-contractions-of-rat-middle-cerebral-arteries-during-co2-hco3-fluctuations
#15
Jacob K Rasmussen, Ebbe Boedtkjer
The CO2/HCO3(-) buffer minimizes pH changes in response to acid-base loads, HCO3(-) provides substrate for Na(+),HCO3(-)-cotransporters and Cl(-)/HCO3(-)-exchangers, and H(+) and HCO3(-) modify vasomotor responses during acid-base disturbances. We show here that rat middle cerebral arteries express cytosolic, mitochondrial, extracellular, and secreted carbonic anhydrase isoforms that catalyze equilibration of the CO2/HCO3(-) buffer. Switching from CO2/HCO3(-)-free to CO2/HCO3(-)-containing extracellular solution results in initial intracellular acidification due to hydration of CO2 followed by gradual alkalinization due to cellular HCO3(-) uptake...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28317701/interaction-of-phenolic-acids-with-trypsin-experimental-and-molecular-modeling-studies
#16
Benguo Liu, Huizhi Xiao, Jiaqi Li, Sheng Geng, Hanjun Ma, Guizhao Liang
Trypsin is a kind of protease for digestion and food processing, whose activity can be inhibited by phenolic acids in plant foods. However, most reports explained the inhibitory difference of phenolic acids based on the number and position of substituent groups, which failed to reveal the comprehensive inhibitory mechanism. In this work, the inhibitory effects of 11 common phenolic acids on trypsin were investigated. Amongst the tested cinnamic and benzoic acid derivatives, caffeic acid and gallic acid showed the strongest anti-trypsin activity with a noncompetitive inhibition pattern, respectively...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317177/optical-sensing-of-anions-via-supramolecular-recognition-with-biimidazole-complexes
#17
Dieter Ulrich Sorsche, Sven Rau, Sebastian Andreas Rommel, Maximilian Fleischmann
Phosphorescent metal complexes with peripheral N-H donor functionalities have attracted great attention as potential molecular sensing units for anionic species lately. In this contribution we discuss the development and potential of anion recognition and sensing features of recent examples of luminescent 2,2'-biimidazole complexes of ruthenium(II), iridium(III), osmium(II) and cobalt(III). The general dependency of photophysical features in these complexes regarding the acid-base chemistry of the peripheral N-H functionalities will be outlined as a basic requirement for optical ion recognition...
March 20, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28314866/a-clinical-trial-using-attrition-combined-with-5-aminolevulinic-acids-based-photodynamic-therapy-in-treating-squamous-cell-carcinoma
#18
Jianzhong Peng, Weiguo Feng, Xianyan Luo, Tao Wang, Wenzhong Xiang, Yeqin Dai, Jingyu Zhu, Junhui Zheng
BACKGROUND Squamous cell carcinoma (SCC) is the second most common type of skin cancer, for which non- or mini-invasive treatment is of critical importance. 5-aminolevulinic acids based photodynamic therapy (ALA-PDT) is a mini-invasive approach that causes focal tumor cell injury, apoptosis, and necrosis through light sensitivity. The efficacy of combining ALA-PDT and surgery in treating SCC, however, has not been demonstrated. MATERIAL AND METHODS A total of 60 SCC patients were randomly assigned into attrition plus ALA-PDT group (experimental group) and single ALA-PDT treatment group (control group)...
March 18, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28304317/early-onset-necrotizing-enterocolitis-nec-in-premature-twins
#19
B Afzal, V Elberson, C McLaughlin, V Hs Kumar
Twin infants born at 34 week gestation had frank blood in stools on day three of life on mixed feeds of formula and maternal breast milk. Sepsis work up was negative in these relatively well appearing infants with pneumatosis in the colon on abdominal x-ray. Blood in stools recurred on reintroduction of breast milk in Twin A. Both infants recovered from episodes of bloody stools on amino-acid based formula and were thriving at discharge. Early necrotizing enterocolitis in both twins is rare and has not been reported...
March 16, 2017: Journal of Neonatal-perinatal Medicine
https://www.readbyqxmd.com/read/28303535/hyaluronic-acid-based-hydrogel-coating-does-not-affect-bone-apposition-at-the-implant-surface-in-a-rabbit-model
#20
W Boot, D Gawlitta, P G J Nikkels, B Pouran, M H P van Rijen, W J A Dhert, H Ch Vogely
BACKGROUND: Uncemented orthopaedic implants rely on the bone-implant interface to provide stability, therefore it is essential that a coating does not interfere with the bone-forming processes occurring at the implant interface. In addition, local application of high concentrations of antibiotics for prophylaxis or treatment of infection may be toxic for osteoblasts and could impair bone growth. QUESTIONS/PURPOSES: In this animal study, we investigated the effect of a commercially available hydrogel, either unloaded or loaded with 2% vancomycin...
March 16, 2017: Clinical Orthopaedics and related Research
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