keyword
MENU ▼
Read by QxMD icon Read
search

Tension

keyword
https://www.readbyqxmd.com/read/28738576/development-of-ph-responsive-polymer-and-citrate-aqueous-two-phase-system-for-extractive-bioconversion-of-cefprozil
#1
Jialing Chen, Zhaoyang Ding, Hongxia Pan, Xuejun Cao
A pH-responsive aqueous two-phase system (pH-ATPS) has been developed by sodium citrate and a recyclable pH-responsive polymer PADB6.8 that can response to the change of pH values. Phase separation mechanism is studied through Low field-NMR. All variables affecting the phase separation are evaluated. Phase characteristics (viscosity, density, interfacial tension) and phase separation kinetic are studied for understanding of separation process and operational parameters in applications. This pH-ATPS has the characters of low interfacial tension, high recovery leading efficient mass transfer and low cost...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738264/evidence-of-anomalous-behavior-of-intermolecular-interactions-at-low-concentration-of-methanol-in-ethanol-methanol-binary-system
#2
K Nilavarasi, Thejus R Kartha, V Madhurima
At low concentrations of methanol in a binary system of ethanol and methanol, uniquely complex molecular interactions are reported here. Previous studies indicate that ethanol molecules form aggregates held together by hydrogen bonding (O-H-O) and also dispersive forces. Addition of small amount of methanol tends to break the hydrogen bond network of ethanol due to the larger polarity of methanol. This leads to the ethanol molecules becoming somewhat isolated from each other within a scaffolding network of methanol molecules, as seen from the present molecular dynamics simulations...
July 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28738158/efficient-interfacially-driven-vehiculization-of-corticosteroids-by-pulmonary-surfactant
#3
Alberto Hidalgo, Fabrizio Salomone, Nieves Fresno, Guillermo Orellana, Antonio Cruz, Jesus Perez-Gil
Pulmonary surfactant is a crucial system to stabilize the respiratory air-liquid interface. Furthermore, pulmonary surfactant has been proposed as an effective method for targeting drugs to the lungs. However, few studies have examined in detail the mechanisms of incorporation of drugs into surfactant, the impact of the presence of drugs on pulmonary surfactant performance at the interface under physiologically-meaningful conditions, or the ability of pulmonary surfactant to use the air-liquid interface to vehiculise drugs to long distances...
July 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28737772/cortical-forces-and-cdc-42-control-clustering-of-par%C3%A2-proteins-for-caenorhabditis-elegans-embryonic%C3%A2-polarization
#4
Shyi-Chyi Wang, Tricia Yu Feng Low, Yukako Nishimura, Laurent Gole, Weimiao Yu, Fumio Motegi
Cell polarization enables zygotes to acquire spatial asymmetry, which in turn patterns cellular and tissue axes during development. Local modification in the actomyosin cytoskeleton mediates spatial segregation of partitioning-defective (PAR) proteins at the cortex, but how mechanical changes in the cytoskeleton are transmitted to PAR proteins remains elusive. Here we uncover a role of actomyosin contractility in the remodelling of PAR proteins through cortical clustering. During embryonic polarization in Caenorhabditis elegans, actomyosin contractility and the resultant cortical tension stimulate clustering of PAR-3 at the cortex...
July 24, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28737718/experimental-study-on-the-health-benefits-of-garden-landscape
#5
Juyoung Lee
To mitigate the negative effects of modern cities on health, scientists are focusing on the diverse benefits of natural environments; a conceptual approach to use gardens for promoting human health is being attempted. In this study, the effects of the visual landscape of a traditional garden on psychological and physiological activities were investigated. Eighteen male and female adults participated in this indoor experiment (mean age, 26.7 years). Twelve different landscape images for city and garden were presented continuously for 90 s...
July 24, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28737619/revision-total-elbow-arthroplasty
#6
Miguel A Ramirez, Emilie V Cheung, Anand M Murthi
Despite recent technologic advances, total elbow arthroplasty has complication rates higher than that of total joint arthroplasty in other joints. With new antirheumatic treatments, the population receiving total elbow arthroplasty has shifted from patients with rheumatoid arthritis to those with posttraumatic arthritis, further compounding the high complication rate. The most common reasons for revision include infection, aseptic loosening, fracture, and component failure. Common mechanisms of total elbow arthroplasty failure include infection, aseptic loosening, fracture, component failure, and instability...
August 2017: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/28737563/reverse-distal-transverse-palmar-arch-in-distal-digital-replantation
#7
Ching-Yueh Wei, Oscar Orozco, Gustavo Vinagre, Mark Shafarenko
BACKGROUND: Refinements in microsurgery have made distal finger replantation an established technique with high success rates and good functional and aesthetic outcomes. However, it still represents a technically demanding procedure due to the small vessel caliber and frequent lack of vessel length, requiring the use of interpositional venous grafts in some instances. We describe a new technique for anastomosis in fingertip replantation, whereby the need for venous grafts is eliminated...
July 22, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28737562/dynamic-cleft-maxillary-orthopedics-and-periosteoplasty-25-patients-25-years
#8
Frederick N Lukash, Lauren B Shikowitz-Behr, Michael Schwartz, Frank Tuminelli
In 1985 this cleft team, dissatisfied with the treatment and results from cleft lip and palate repair, began a longitudinal long-term study using dynamic maxillary orthopedics and periosteoplasty as was originally described by Drs Millard and Latham. All cases were carefully documented through adolescence, including clinical assessments, orthodontic, radiographic, and cephalometric analyses. In 1998, in this journal, we published our data on 35 complete unilateral and 10 complete bilateral cleft patients. At that time facial growth was following normal cephalometric patterns...
July 22, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28737431/the-analysis-of-pneumatic-atomization-of-newtonian-and-non-newtonian-fluids-for-different-medical-nebulizers
#9
Marek Ochowiak, Magdalena Matuszak, Sylwia Włodarczak
OBJECTIVE: The paper contains results of the experimental studies on atomization process of inhaled drugs and aqueous solutions of glycerol with aqueous solutions of glycerol-polyacrylamide (Rokrysol WF1) in pneumatic nebulizers. In experiments the different concentration of aqueous solutions of glycerol-polyacrylamide have been tested. In addition, the effect of nebulizer design on atomization process has been determined. The one of the main elements of medical pneumatic nebulizer is nebulizer cup...
July 24, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28737384/physicochemical-parameters-affecting-the-electrospray-ionization-efficiency-of-amino-acids-after-acylation
#10
Jos Hermans, Sara Ongay, Vadym Markov, Rainer Bischoff
Electrospray ionization (ESI) is widely used in liquid chromatography coupled to mass spectrometry (LC-MS) for the analysis of biomolecules. However, the ESI process is still not completely understood and it is often a matter of trial and error to enhance ESI efficiency and hence the response of a given set of compounds. In this work we performed a systematic study of the ESI response of 14 amino acids that were acylated with organic acid anhydrides of increasing chain length and with polyethylene glycol (PEG) changing certain physicochemical properties in a predictable manner...
July 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28737355/-the-silent-disappearance-of-padhue-doctors-the-end-of-a-state-injustice-or-a-new-form-of-exclusion
#11
Alice Desclaux
Up until recently in France, physicians who obtained their degrees outside the European Union had a specifically disadvantaged status, that was supposed to be eliminated by the end of 2016. Until that date, a selective qualification process authorized foreign physicians to “full practice”. The deadline has been postponed to 2017 to resolve the complicated situations of certain doctors and to avoid tensions in hospital wards. These developments raise questions about the working conditions and motivations for migration of foreign medical doctors, particularly African doctors, who participate in the French healthcare system, and the obstacles to their integration...
July 10, 2017: Santé Publique: Revue Multidisciplinaire Pour la Recherche et L'action
https://www.readbyqxmd.com/read/28737038/evolution-of-aggregate-structure-in-solutions-of-anionic-monorhamnolipids-experimental-and-computational-results
#12
Ryan J Eismin, Elango Munusamy, Laurel L Kegel, David E Hogan, Raina M Maier, Steven D Schwartz, Jeanne E Pemberton
The evolution of solution aggregates of the anionic form of the native monorhamnolipid (mRL) mixture produced by Pseudomonas aeruginosa ATCC 9027 is explored at pH 8.0 using both experimental and computational approaches. Experiments utilizing surface tension measurements, dynamic light scattering, and both steady-state and time-resolved fluorescence spectroscopy reveal solution aggregation properties. All-atom molecular dynamics simulations on self-assemblies of the most abundant monorhamnolipid molecule, l-rhamnosyl-β-hydroxydecanoyl-β-hydroxydecanoate (Rha-C10-C10), in its anionic state explore the formation of aggregates and the role of hydrogen bonding, substantiating the experimental results...
July 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28736683/progress-toward-optimizing-prosthetic-socket-fit-and-suspension-using-elevated-vacuum-to-promote-residual-limb-health
#13
Matthew M Wernke, Ryan M Schroeder, Michael L Haynes, Lonnie L Nolt, Alexander W Albury, James M Colvin
Objective: Prosthetic sockets are custom made for each amputee, yet there are no quantitative tools to determine the appropriateness of socket fit. Ensuring a proper socket fit can have significant effects on the health of residual limb soft tissues and overall function and acceptance of the prosthetic limb. Previous work found that elevated vacuum pressure data can detect movement between the residual limb and the prosthetic socket; however, the correlation between the two was specific to each user. The overall objective of this work is to determine the relationship between elevated vacuum pressure deviations and prosthetic socket fit...
July 1, 2017: Advances in Wound Care
https://www.readbyqxmd.com/read/28736682/standardized-approach-to-quantitatively-measure-residual-limb-skin-health-in-individuals-with-lower-limb-amputation
#14
Cameron L Rink, Matthew M Wernke, Heather M Powell, Mark Tornero, Surya C Gnyawali, Ryan M Schroeder, Jayne Y Kim, Jeffrey A Denune, Alexander W Albury, Gayle M Gordillo, James M Colvin, Chandan K Sen
Objective: (1) Develop a standardized approach to quantitatively measure residual limb skin health. (2) Report reference residual limb skin health values in people with transtibial and transfemoral amputation. Approach: Residual limb health outcomes in individuals with transtibial (n = 5) and transfemoral (n = 5) amputation were compared to able-limb controls (n = 4) using noninvasive imaging (hyperspectral imaging and laser speckle flowmetry) and probe-based approaches (laser doppler flowmetry, transcutaneous oxygen, transepidermal water loss, surface electrical capacitance)...
July 1, 2017: Advances in Wound Care
https://www.readbyqxmd.com/read/28736537/the-five-marks-of-the-mental
#15
REVIEW
Tuomas K Pernu
The mental realm seems different to the physical realm; the mental is thought to be dependent on, yet distinct from the physical. But how, exactly, are the two realms supposed to be different, and what, exactly, creates the seemingly insurmountable juxtaposition between the mental and the physical? This review identifies and discusses five marks of the mental, features that set characteristically mental phenomena apart from the characteristically physical phenomena. These five marks (intentionality, consciousness, free will, teleology, and normativity) are not presented as a set of features that define mentality...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28736393/traditional-healers-faith-healers-and-medical-practitioners-the-contribution-of-medical-pluralism-to-bottlenecks-along-the-cascade-of-care-for-hiv-aids-in-eastern-and-southern-africa
#16
Mosa Moshabela, Dominic Bukenya, Gabriel Darong, Joyce Wamoyi, Estelle McLean, Morten Skovdal, William Ddaaki, Kenneth Ondeng'e, Oliver Bonnington, Janet Seeley, Victoria Hosegood, Alison Wringe
OBJECTIVES: There are concerns that medical pluralism may delay patients' progression through the HIV cascade-of-care. However, the pathways of impact through which medical pluralism influence the care of people living with HIV (PLHIV) in African settings remain unclear. We sought to establish the manifestation of medical pluralism among PLHIV, and explore mechanisms through which medical pluralism contributes bottlenecks along the HIV care cascade. METHODS: We conducted a multicountry exploratory qualitative study in seven health and demographic surveillance sites in six eastern and southern African countries: Uganda, Kenya, Tanzania, Malawi, Zimbabwe and South Africa...
July 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28736389/hiv-testing-experiences-and-their-implications-for-patient-engagement-with-hiv-care-and-treatment-on-the-eve-of-test-and-treat-findings-from-a-multicountry-qualitative-study
#17
Alison Wringe, Mosa Moshabela, Constance Nyamukapa, Dominic Bukenya, Ken Ondenge, William Ddaaki, Joyce Wamoyi, Janet Seeley, Kathryn Church, Basia Zaba, Victoria Hosegood, Oliver Bonnington, Morten Skovdal, Jenny Renju
OBJECTIVE: In view of expanding 'test and treat' initiatives, we sought to elicit how the experience of HIV testing influenced subsequent engagement in HIV care among people diagnosed with HIV. METHODS: As part of a multisite qualitative study, we conducted in-depth interviews in Uganda, South Africa, Tanzania, Kenya, Malawi and Zimbabwe with 5-10 health workers and 28-59 people living with HIV, per country. Topic guides covered patient and provider experiences of HIV testing and treatment services...
July 2017: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/28736167/an-actomyosin-arf-gef-negative-feedback-loop-for-tissue-elongation-under-stress
#18
Junior J West, Teresa Zulueta-Coarasa, Janna A Maier, Donghoon M Lee, Ashley E E Bruce, Rodrigo Fernandez-Gonzalez, Tony J C Harris
In response to a pulling force, a material can elongate, hold fast, or fracture. During animal development, multi-cellular contraction of one region often stretches neighboring tissue. Such local contraction occurs by induced actomyosin activity, but molecular mechanisms are unknown for regulating the physical properties of connected tissue for elongation under stress. We show that cytohesins, and their Arf small G protein guanine nucleotide exchange activity, are required for tissues to elongate under stress during both Drosophila dorsal closure (DC) and zebrafish epiboly...
July 13, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28735884/from-drop-shape-analysis-to-stress-fitting-elastometry
#19
REVIEW
Mathias Nagel, Theo A Tervoort, Jan Vermant
Drop-shape analysis using pendant or sessile drops is a well-established experimental technique for measuring the interfacial or surface tension, and changes thereof. The method relies on deforming a drop by either gravity or buoyancy and fitting the Young-Laplace equation to the drop shape. Alternatively one can prescribe the shape and measure the pressure inside the drop or bubble using pressure tensiometry. However, when an interface with a complex microstructure is present, extra and anisotropic interfacial stresses may develop due to lateral interactions between the surface-active moieties, leading to deviations of the drop shape or even a wrinkling of the interface...
July 13, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28735723/a-rate-independent-continuum-model-for-bone-tissue-with-interaction-of-compressive-and-tensile-micro-damage
#20
Philippe K Zysset, Uwe Wolfram
Low bone strength is a major risk factor for osteoporotic fractures and is only partially determined by clinical densitometry. Accumulated micro-damage induces residual strains, degrades elastic modulus and reduces bone strength independently of bone mineral density. Histologically, overloading of bone in compression and tension leads to distinct crack size, distribution and orientation which interact during combined loading scenarios. Statistics of rheological models can describe this process and reproduce experimental stress-strain curves with an unprecedented realism, but are computationally expensive and therefore difficult to generalize to 3D...
July 8, 2017: Journal of the Mechanical Behavior of Biomedical Materials
keyword
keyword
27257
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"