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https://www.readbyqxmd.com/read/28813026/breath-figure-self-assembly-a-versatile-method-of-manufacturing-membranes-and-porous-structures-physical-chemical-and-technological-aspects
#1
REVIEW
Edward Bormashenko
The review is devoted to the physical, chemical, and technological aspects of the breath-figure self-assembly process. The main stages of the process and impact of the polymer architecture and physical parameters of breath-figure self-assembly on the eventual pattern are covered. The review is focused on the hierarchy of spatial and temporal scales inherent to breath-figure self-assembly. Multi-scale patterns arising from the process are addressed. The characteristic spatial lateral scales of patterns vary from nanometers to dozens of micrometers...
August 16, 2017: Membranes
https://www.readbyqxmd.com/read/28811184/experimental-cocrystal-screening-and-solution-based-scale-up-cocrystallization-methods
#2
REVIEW
Maria Malamatari, Steven A Ross, Dennis Douroumis, Sitaram P Velaga
Cocrystals are crystalline single phase materials composed of two or more different molecular and/or ionic compounds generally in a stoichiometric ratio which are neither solvates nor simple salts. If one of the components is an active pharmaceutical ingredient (API), the term pharmaceutical cocrystal is often used. There is a growing interest among drug development scientists in exploring cocrystals, as means to address physicochemical, biopharmaceutical and mechanical properties and expand solid form diversity of the API...
August 12, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28811100/is-supercritical-fluid-chromatography-hyphenated-to-mass-spectrometry-suitable-for-the-quality-control-of-vitamin-d3-oily-formulations
#3
B Andri, A Dispas, R Klinkenberg, B Streel, R D Marini, E Ziémons, Ph Hubert
Nowadays, many efforts are devoted to improve analytical methods regarding efficiency, analysis time and greenness. In this context, Supercritical Fluid Chromatography (SFC) is often regarded as a good alternative over Normal Phase Liquid Chromatography (NPLC). Indeed, modern SFC separations are fast, efficient with suitable quantitative performances. Moreover, the hyphenation of SFC to mass spectrometry (MS) provides additional gains in specificity and sensitivity. The present work aims at the determination of vitamin D3 by SFC-MS for routine Quality Control (QC) of medicines specifically...
July 27, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28809427/advances-in-chemoselective-intermolecular-cross-benzoin-type-condensation-reactions
#4
REVIEW
Nicoletta Gaggero, Stefano Pandini
The intermolecular cross-benzoin and acyloin condensation reactions are powerful approaches to α-hydroxy carbonyls in a single step. However, their potentiality suffers from the occurrence of side reactions including self-condensation and the formation of the undesired cross-acyloin. The broad range of azolium salt precatalysts available confers high tunability to NHC mediated benzoin condensation, assuring a good level of selectivity to the direct coupling between two non-equivalent aldehydes. Many efforts have also been devoted to the design of strategies that expand the range of suitable reaction partners beyond the traditional aldehydes and to the discovery of novel umpolung catalytic systems...
August 15, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28808998/microfluidics-mass-spectrometry-of-protein-carbohydrate-interactions-applications-to-the-development-of-therapeutics-and-biomarker-discovery
#5
Alina D Zamfir
The functional interactions of carbohydrates and their protein receptors are the basis of biological events critical to the evolution of pathological states. Hence, for the past years, such interactions have become the focus of research for the development of therapeutics and discovery of novel glycan biomarkers based on their binding affinity. Due to the high sensitivity, throughput, reproducibility, and capability to ionize minor species in heterogeneous mixtures, microfluidics-mass spectrometry (MS) has recently emerged as a method of choice in protein-glycan interactomics...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28805354/microbial-ecology-based-engineering-of-microbial-electrochemical-technologies
#6
REVIEW
Christin Koch, Benjamin Korth, Falk Harnisch
Microbial ecology is devoted to the understanding of dynamics, activity and interaction of microorganisms in natural and technical ecosystems. Bioelectrochemical systems represent important technical ecosystems, where microbial ecology is of highest importance for their function. However, whereas aspects of, for example, materials and reactor engineering are commonly perceived as highly relevant, the study and engineering of microbial ecology are significantly underrepresented in bioelectrochemical systems...
August 14, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28805065/neurohormonal-modulation-for-treatment-of-cardiac-involvement-in-dystrophinopathies-and-mitochondrial-disease
#7
Alberto Aimo, Alberto Giannoni, Vincenzo Castiglione, Michelangelo Mancuso, Gabriele Siciliano, Massimo F Piepoli, Claudio Passino, Michele Emdin
Mutations in either the nuclear or the mitochondrial genome can lead to structural and functional changes within the skeletal muscles. These genetic skeletal myopathies are rare, although not infrequent when their cumulative incidence is considered. Dystrophinopathies (Duchenne and Becker muscular dystrophies) and mitochondrial disease are some of the most frequent clinical entities, and those developing heart failure more frequently. Neurohormonal antagonism represents the cornerstone of heart failure management, even though its role in the prevention and treatment of heart failure in patients with dystrophinopathies or mitochondrial disorders remains undefined...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28804481/the-type-vi-secretion-system-a-dynamic-system-for-bacterial-communication
#8
REVIEW
Mathias Gallique, Mathilde Bouteiller, Annabelle Merieau
Numerous studies in Gram-negative bacteria have focused on the Type VI Secretion Systems (T6SSs), Quorum Sensing (QS), and social behavior, such as in biofilms. These interconnected mechanisms are important for bacterial survival; T6SSs allow bacteria to battle other cells, QS is devoted to the perception of bacterial cell density, and biofilm formation is essentially controlled by QS. Here, we review data concerning T6SS dynamics and T6SS-QS cross-talk that suggest the existence of inter-bacterial communication via T6SSs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28802567/nano-sized-and-other-improved-reporters-for-magnetic-resonance-imaging-of-angiogenesis
#9
Simonetta Geninatti Crich, Enzo Terreno, Silvio Aime
Magnetic Resonance Imaging (MRI) enables to provide anatomical, functional and molecular information of pathological angiogenesis when used with properly tailored imaging probes. Functional studies have been the domain of Dynamic Contrast Enhancement (DCE) -MRI protocols from which it is possible to extract quantitative estimations on key parameters such as the volumes of vascular and extracellular compartments and the rates of the bidirectional exchange of the imaging reporters across the endothelial barrier...
August 9, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28802347/using-quality-improvement-tools-to-reduce-chronic-lung-disease
#10
REVIEW
Alan Peter Picarillo, Waldemar Carlo
Rates of chronic lung disease (CLD) in very low birthweight infants have not decreased at the same pace as other neonatal morbidities over the past 20 years. Multifactorial causes of CLD make this common morbidity difficult to reduce, although there have been several successful quality improvement (QI) projects in individual neonatal intensive care units. QI projects have become a mainstay of neonatal care over the past decade, with an increasing number of publications devoted to this topic. A specific QI project for CLD must be based on best available evidence in the medical literature, expert recommendations, or based on work by previous QI initiatives...
September 2017: Clinics in Perinatology
https://www.readbyqxmd.com/read/28802154/optimization-of-the-sensitivity-doses-relationship-for-a-bench-top-edxrf-system-used-for-in-vivo-quantification-of-gold-nanoparticles
#11
M Santibáñez, R Saavedra, M Vásquez, F Malano, P Pérez, M Valente, R G Figueroa
The present work is devoted to optimizing the sensitivity-doses relationship of a bench-top EDXRF system, with the aim of achieving a detection limit of 0.010mg/ml of gold nanoparticles in tumor tissue (clinical values expected), for doses below 10mGy (value fixed for in vivo application). Tumor phantoms of 0.3cm(3) made of a suspension of gold nanoparticles (15nm AurovistTM, Nanoprobes Inc.) were studied at depths of 0-4mm in a tissue equivalent cylindrical phantom. The optimization process was implemented configuring several tube voltages and aluminum filters, to obtain non-symmetrical narrow spectra with fixed FWHM of 5keV and centered among the 11...
August 4, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28800585/comparative-pathogenomics-of-clostridium-tetani
#12
Jonathan E Cohen, Rong Wang, Rong-Fong Shen, Wells W Wu, James E Keller
Clostridium tetani and Clostridium botulinum produce two of the most potent neurotoxins known, tetanus neurotoxin and botulinum neurotoxin, respectively. Extensive biochemical and genetic investigation has been devoted to identifying and characterizing various C. botulinum strains. Less effort has been focused on studying C. tetani likely because recently sequenced strains of C. tetani show much less genetic diversity than C. botulinum strains and because widespread vaccination efforts have reduced the public health threat from tetanus...
2017: PloS One
https://www.readbyqxmd.com/read/28800106/recent-trends-on-electrochemical-sensors-based-on-ordered-mesoporous-carbon
#13
REVIEW
Alain Walcarius
The past decade has seen an increasing number of extensive studies devoted to the exploitation of ordered mesoporous carbon (OMC) materials in electrochemistry, notably in the fields of energy and sensing. The present review summarizes the recent achievements made in field of electroanalysis using electrodes modified with such nanomaterials. On the basis of comprehensive tables, the interest in OMC for designing electrochemical sensors is illustrated through the various applications developed to date. They include voltammetric detection after preconcentration, electrocatalysis (intrinsically due to OMC or based on suitable catalysts deposited onto OMC), electrochemical biosensors, as well as electrochemiluminescence and potentiometric sensors...
August 11, 2017: Sensors
https://www.readbyqxmd.com/read/28799832/soldiers-preferences-regarding-sperm-preservation-posthumous-reproduction-and-attributes-of-a-potential-posthumous-mother
#14
Ya'arit Bokek-Cohen, Vardit Ravitsky
We present study results regarding soldiers' willingness to conduct posthumous reproduction. Two hundred twelve Israeli soldiers filled in a questionnaire designed to examine their willingness to cryopreserve sperm and evaluate in which familial circumstances they would consent to posthumous reproduction. They ranked the desirability of 46 attributes of a potential mother and a life partner. Findings indicate a relatively high predisposition in favor of posthumous-assisted reproduction; the wishes of soldiers' parents had much more influence on soldiers' willingness to pursue this technology than those of a partner...
January 1, 2017: Omega
https://www.readbyqxmd.com/read/28799163/cost-analysis-and-performance-assessment-of-partner-services-for-human-immunodeficiency-virus-and-sexually-transmitted-diseases-new-york-state-2014
#15
Britney L Johnson, James Tesoriero, Wenhui Feng, Feng Qian, Erika G Martin
OBJECTIVE: To estimate the programmatic costs of partner services for HIV, syphilis, gonorrhea, and chlamydial infection. STUDY SETTING: New York State and local health departments conducting partner services activities in 2014. STUDY DESIGN: A cost analysis estimated, from the state perspective, total program costs and cost per case assignment, patient interview, partner notification, and disease-specific key performance indicator. DATA COLLECTION: Data came from contracts, a time study of staff effort, and statewide surveillance systems...
August 11, 2017: Health Services Research
https://www.readbyqxmd.com/read/28798814/editorial-childhood-cancer-in-sub-saharan-africa
#16
EDITORIAL
Donald Maxwell Parkin, Cristina Stefan
Measurement of incidence rates of childhood cancer in Africa is difficult. The study 'Cancer of Childhood in sub Saharan Africa' [Stefan C, Bray F, Ferlay J, Parkin DM and Liu B (2017) Cancer of Childhood in sub-Saharan Africaecancer11(755)] brings together results from 16 population-based registries which, as members of the African Cancer Registry Network (AFCRN), have been evaluated as achieving adequate coverage of their target population. The cancers are classified according to the third revision of the International Classification of Childhood Cancer (ICCC-3) and recorded rates in Africa are compared with those in childhood populations in the UK, France, and the USA...
2017: Ecancermedicalscience
https://www.readbyqxmd.com/read/28798803/preparation-of-a-nanoemulsion-with-carapa-guianensis-aublet-meliaceae-oil-by-a-low-energy-solvent-free-method-and-evaluation-of-its-preliminary-residual-larvicidal-activity
#17
Flávia L M Jesus, Fernanda B de Almeida, Jonatas L Duarte, Anna E M F M Oliveira, Rodrigo A S Cruz, Raimundo N P Souto, Ricardo M A Ferreira, Regina Gendzelevski Kelmann, José C T Carvalho, Ana C Lira-Guedes, Marcelino Guedes, Conxita Solans, Caio P Fernandes
Andiroba (Carapa guianensis) seeds are the source of an oil with a wide range of biological activities and ethnopharmacological uses. However, few studies have devoted attention to innovative formulations, including nanoemulsions. The present study aimed to obtain a colloidal system with the andiroba oil using a low-energy and organic-solvent-free method. Moreover, the preliminary residual larvicidal activity of the nanoemulsion against Aedes aegypti was evaluated. Oleic and palmitic acids were the major fatty acids, in addition to the phytosterol β-sitosterol and limonoids (tetranortriterpenoids)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28798466/minimally-invasive-direct-restorations-a-practical-guide
#18
L Mackenzie, A Banerjee
The primary objectives of minimum intervention dentistry (MID) are to prevent or arrest active disease using non-operative management techniques. However, patients commonly present with cavitated caries lesions or failed restorations that are in need of operative intervention. Although much of clinical practice is devoted to preventing and managing the effects of caries and subsequent failure of the tooth-restoration complex, the clinical survival of restorations is often poor and becomes significantly worse as they increase in size and complexity...
August 11, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28796201/enhanced-sensitivity-at-higher-order-exceptional-points
#19
Hossein Hodaei, Absar U Hassan, Steffen Wittek, Hipolito Garcia-Gracia, Ramy El-Ganainy, Demetrios N Christodoulides, Mercedeh Khajavikhan
Non-Hermitian degeneracies, also known as exceptional points, have recently emerged as a new way to engineer the response of open physical systems, that is, those that interact with the environment. They correspond to points in parameter space at which the eigenvalues of the underlying system and the corresponding eigenvectors simultaneously coalesce. In optics, the abrupt nature of the phase transitions that are encountered around exceptional points has been shown to lead to many intriguing phenomena, such as loss-induced transparency, unidirectional invisibility, band merging, topological chirality and laser mode selectivity...
August 9, 2017: Nature
https://www.readbyqxmd.com/read/28795814/anion-exchange-membrane-fuel-cells-with-improved-co2-tolerance-impact-of-chemically-induced-bicarbonate-ion-consumption
#20
Yu Katayama, Kosuke Yamauchi, Kohei Hayashi, Takeou Okanishi, Hiroki Muroyama, Toshiaki Matsui, Yuuki Kikkawa, Takayuki Negishi, Shin Watanabe, Takenori Isomura, Koichi Eguchi
Over the last few decades, owing to the significant development of anion exchange membranes, increasing efforts have been devoted the realization of anion exchange membrane fuel cells (AEMFCs) that operate with the supply of hydrogen generated on-site. In this paper, ammonia was selected as a hydrogen source, following which the effect of conceivable impurities, unreacted NH3 and atmospheric CO2, on the performance of AEMFCs was established. As expected, we show that these impurities worsen the performance of AEMFCs significantly...
August 10, 2017: ACS Applied Materials & Interfaces
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