keyword
MENU ▼
Read by QxMD icon Read
search

Mechanical strain

keyword
https://www.readbyqxmd.com/read/28437624/immune-response-to-salmonella-infections-in-vaccinated-and-non-vaccinated-turkeys
#1
Martina Hesse, Andreas Stamm, Angela Berndt, Gerhard Glünder, Rita Weber
Vaccination has been widely used to reduce the Salmonella burden in poultry and subsequently the transmission to humans. Concerning turkey, there is little knowledge on the immune response to colonization and invasion by Salmonella species or about efficacy of vaccination and involved immune mechanisms. In the present study, turkeys were vaccinated at the day of hatch and infected with Salmonella Typhimurium (ST) or Enteritidis (SE) field strains three weeks later. A control group was kept uninfected. After challenge infection, bacterial counts in the cecal content, liver and spleen were determined 7 and 14days post infection...
April 6, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28437342/left-ventricular-mechanics-assessed-by-2-dimensional-speckle-tracking-echocardiography-in-children-and-adolescents-with-idiopathic-scoliosis
#2
Shujuan Li, Junlin Yang, Ling Zhu, Yunquan Li, Huimin Peng, Yuese Lin, Xuandi Li, Zifang Huang, Huishen Wang
STUDY DESIGN: A retrospective review of data collected prospectively. OBJECTIVE: The study aimed to assess the possible effects of idiopathic scoliosis on left ventricular (LV) myocardial performance in children and adolescent patients. SUMMARY OF BACKGROUND DATA: Spine anomaly may impair cardiorespiratory function. It has been confirmed that respiratory function decreased in patients with scoliosis. However, limited study of the effect of scoliosis on heart function has been published, and no assessment of myocardial deformation of these patients has been reported to our knowledge...
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28437230/high-diversity-of-antimicrobial-resistance-genes-class-1-integrons-and-genotypes-of-multidrug-resistant-escherichia-coli-in-beef-carcasses
#3
Chih-Ming Chen, Se-Chin Ke, Chia-Ru Li, Ying-Chen Wu, Ter-Hsin Chen, Chih-Ho Lai, Xin-Xia Wu, Lii-Tzu Wu
Multidrug-resistant Escherichia coli can contaminate food meat during processing and cause human infection. Phenotypic and genotypic characterization of the antimicrobial resistance were conducted for 45 multidrug-resistant E. coli isolates from 208 samples of beef carcasses. The mechanisms of resistance were evaluated using polymerase chain reaction and sequencing methods, and the clonal relationship among isolates was evaluated using multilocus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE)...
February 23, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28437229/quinolone-resistance-determinants-of-clinical-salmonella-enteritidis-in-thailand
#4
Fuangfa Utrarachkij, Chie Nakajima, Ruchirada Changkwanyeun, Kanokrat Siripanichgon, Siriporn Kongsoi, Srirat Pornruangwong, Kanjana Changkaew, Risa Tsunoda, Yutaka Tamura, Orasa Suthienkul, Yasuhiko Suzuki
Salmonella Enteritidis has emerged as a global concern regarding quinolone resistance and invasive potential. Although quinolone-resistant S. Enteritidis has been observed with high frequency in Thailand, information on the mechanism of resistance acquisition is limited. To elucidate the mechanism, a total of 158 clinical isolates of nalidixic acid (NAL)-resistant S. Enteritidis were collected throughout Thailand, and the quinolone resistance determinants were investigated in the context of resistance levels to NAL, norfloxacin (NOR), and ciprofloxacin (CIP)...
February 23, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28437179/mechanically-oriented-3d-collagen-hydrogel-for-directing-neurite-growth
#5
Merav Antman-Passig, Shahar Levy, Chaim Gartenberg, Hadas Schori, Orit Shefi
Recent studies in the field of neuro-tissue engineering have demonstrated the promising effects of aligned contact guidance cue scaffolds of enhancement and direction of neuronal growth. In-vivo, neurons grow and develop neurites in a complex 3-Dimensional (3D) extra cellular matrix (ECM) surrounding. Studies have utilized hydrogel scaffolds derived from ECM molecules to better simulate natural growth. While many efforts have been made to control neuronal growth on 2D surfaces, the development of 3D scaffolds with an elaborate oriented topography to direct neuronal growth still remains a challenge...
February 21, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28437095/reliability-of-single-crystal-silver-nanowire-based-systems-stress-assisted-instabilities
#6
Rajaprakash Ramachandramoorthy, Yanming Wang, Amin Aghaei, Gunther Richter, Wei Cai, Horacio D Espinosa
Time-dependent mechanical characterization of nanowires is critical to understand their long-term reliability in applications such as flexible-electronics and touch screens. It is also of great importance to develop a theoretical framework for experimentation and analysis on the mechanics of nanowires under time-dependent loading conditions such as stress-relaxation and fatigue. Here, we combine in situ scanning electron microscope (SEM)/transmission electron microscope (TEM) tests with atomistic and phase-field simulations to understand the deformation mechanisms of single crystal silver nanowires held under constant strain...
April 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28436838/electromechanical-coupling-factor-of-breast-tissue-as-a-biomarker-for-breast-cancer
#7
Kihan Park, Wenjin Chen, Marina Chekmareva, David Foran, Jaydev Desai
GOAL: This research aims to validate a new biomarker of breast cancer by introducing electromechanical coupling factor of breast tissue samples as a possible additional indicator of breast cancer. Since collagen fibril exhibits a structural organization that gives rise to a piezoelectric effect, the difference in collagen density between normal and cancerous tissue can be captured by identifying the corresponding electromechanical coupling factor. METHODS: The design of a portable diagnostic tool and a microelectromechanical systems(MEMS)- based biochip, which is integrated with a piezoresistive sensing layer for measuring the reaction force as well as a microheater for temperature control, is introduced...
April 19, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28436760/diabetes-management-by-probiotics-current-knowledge-and-future-pespective
#8
Aziz Homayouni-Rad, Ahmad-Reza Soroush, Leila Khalili, Leila Norouzi-Panahi, Zahra Kasaie, Hanieh-Sadat Ejtahed
Diabetes mellitus, a multifactorial disorder, is related to the intestinal microbiota via numerous molecular mechanisms. The vast increase in the prevalence of diabetes and its associated complications requires a natural and safe solution. There is a growing evidence of gut microbiota effi ciency in improving insulin resistance, impaired insulin secretion, and metabolic complications in diabetic patients. Probiotics are defi ned as live microorganisms that, when ingested in adequate amounts, exert health benefi ts to the host...
April 24, 2017: International Journal for Vitamin and Nutrition Research. Journal International de Vitaminologie et de Nutrition
https://www.readbyqxmd.com/read/28436748/disruption-of-tetr-type-regulator-aden-by-mobile-genetic-element-confers-elevated-virulence-in-acinetobacter-baumannii
#9
Rajagopalan Saranathan, Sudhakar Pagal, Ajit R Sawant, Archana Tomar, M Madhangi, Suresh Sah, Annapurna Satti, K P Arunkumar, K Prashanth
Acinetobacter baumannii is an important human pathogen and considered as a major threat due to its extreme drug resistance. In this study, the genome of a hyper-virulent MDR strain PKAB07 of A. baumannii isolated from an Indian patient was sequenced and analysed to understand its mechanisms of virulence, resistance and evolution. Comparative genomics analysis of PKAB07 revealed virulence and resistance related genes scattered throughout the genome, instead of being organized as an island, indicating the highly mosaic nature of the genome...
April 24, 2017: Virulence
https://www.readbyqxmd.com/read/28436430/photostriction-of-strontium-ruthenate
#10
Tzu-Chiao Wei, Hsin-Ping Wang, Heng-Jui Liu, Dung-Sheng Tsai, Jr-Jian Ke, Chung-Lun Wu, Yu-Peng Yin, Qian Zhan, Gong-Ru Lin, Ying-Hao Chu, Jr-Hau He
Transition metal oxides with a perovskite crystal structure exhibit a variety of physical properties associated with the lattice. Among these materials, strontium ruthenate (SrRuO3) displays unusually strong coupling of charge, spin and lattice degrees of freedom that can give rise to the photostriction, that is, changes in the dimensions of material due to the absorption of light. In this study, we observe a photon-induced strain as high as 1.12% in single domain SrRuO3, which we attribute to a nonequilibrium of phonons that are a result of the strong interaction between the crystalline lattice and electrons excited by light...
April 24, 2017: Nature Communications
https://www.readbyqxmd.com/read/28436426/stretchable-ag-electrodes-with-mechanically-tunable-optical-transmittance-on-wavy-patterned-pdms-substrates
#11
Eun-Hye Ko, Hyo-Joong Kim, Sang-Mok Lee, Tae-Woong Kim, Han-Ki Kim
We report on semi-transparent stretchable Ag films coated on a wavy-patterned polydimethylsiloxane (PDMS) substrate for use as stretchable electrodes for stretchable and transparent electronics. To improve the mechanical stretchability of the Ag films, we optimized the wavy-pattern of the PDMS substrate as a function of UV-ozone treatment time and pre-strain of the PDMS substrate. In addition, we investigated the effect of the Ag thickness on the mechanical stretchability of the Ag electrode formed on the wavy-patterned PDMS substrate...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28436237/bifidobacterium-infantis-35624-and-other-probiotics-in-the-management-of-irritable-bowel-syndrome-strain-specificity-symptoms-and-mechanisms
#12
Andrew P Allen, Gerard Clarke, John F Cryan, Eamonn M M Quigley, Timothy G Dinan
No abstract text is available yet for this article.
April 22, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28436054/low-cost-manufacturing-of-bioresorbable-conductors-by-evaporation-condensation-mediated-laser-printing-and-sintering-of-zn-nanoparticles
#13
Wan Shou, Bikram K Mahajan, Brandon Ludwig, Xiaowei Yu, Joshua Staggs, Xian Huang, Heng Pan
Currently, bioresorbable electronic devices are predominantly fabricated by complex and expensive vacuum-based integrated circuit (IC) processes. Here, a low-cost manufacturing approach for bioresorbable conductors on bioresorbable polymer substrates by evaporation-condensation-mediated laser printing and sintering of Zn nanoparticle is reported. Laser sintering of Zn nanoparticles has been technically difficult due to the surface oxide on nanoparticles. To circumvent the surface oxide, a novel approach is discovered to print and sinter Zn nanoparticle facilitated by evaporation-condensation in confined domains...
April 24, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28435893/opacification-domain-of-serum-opacity-factor-inhibits-beta-hemolysis-and-contributes-to-virulence-of-streptococcus-pyogenes
#14
Luchang Zhu, Randall J Olsen, James M Musser
Serum opacity factor (SOF) is a cell surface virulence factor made by the human pathogen Streptococcus pyogenes. We found that S. pyogenes strains with naturally occurring truncation mutations in the sof gene have markedly enhanced beta-hemolysis. Moreover, deletion of the sof gene in a SOF-positive parental strain resulted in significantly increased beta-hemolysis. Together, these observations suggest that SOF is an inhibitor of beta-hemolysis. SOF has two major functional domains, including an opacification domain and a fibronectin-binding domain...
March 2017: MSphere
https://www.readbyqxmd.com/read/28435849/effects-of-cyclic-compression-on-the-mechanical-properties-and-calcification-process-of-immature-chick-bone-tissue-in-culture
#15
Eijiro Maeda, Masashi Nakagaki, Katsuhisa Ichikawa, Kazuaki Nagayama, Takeo Matsumoto
Contribution of mechanical loading to tissue growth during both the development and post-natal maturation is of a particular interest, as its understanding would be important to strategies in bone tissue engineering and regenerative medicine. The present study has been performed to investigate how immature bone responds to mechanical loading using an ex vivo culture system. A slice of the tibia, with the thickness of 3 mm, was obtained from 0-day-old chick. For the ex vivo culture experiment in conjunction with cyclic compressive loading, we developed a custom-made, bioreactor system where both the load and the deformation applied to the specimen was recorded...
June 2017: Bone Reports
https://www.readbyqxmd.com/read/28435840/microbial-flora-probiotics-bacillus-subtilis-and-the-search-for-a-long-and-healthy-human-longevity
#16
COMMENT
Facundo Rodriguez Ayala, Carlos Bauman, Sebastián Cogliati, Cecilia Leñini, Marco Bartolini, Roberto Grau
Probiotics are live microorganisms that have beneficial effects on host health, including extended lifespan, when they are administered or present in adequate quantities. However, the mechanisms by which probiotics stimulate host longevity remain unclear and very poorly understood. In a recent study (Nat. Commun. 8, 14332 (2017) doi: 10.1038/ncomms14332), we used the spore-forming probiotic bacterium Bacillus subtilis and the model organism Caenorhabditis elegans to study the mechanism by which a probiotic bacterium affects host longevity...
March 16, 2017: Microbial Cell
https://www.readbyqxmd.com/read/28435467/ultrasound-elastography-review-of-techniques-and-clinical-applications
#17
REVIEW
Rosa M S Sigrist, Joy Liau, Ahmed El Kaffas, Maria Cristina Chammas, Juergen K Willmann
Elastography-based imaging techniques have received substantial attention in recent years for non-invasive assessment of tissue mechanical properties. These techniques take advantage of changed soft tissue elasticity in various pathologies to yield qualitative and quantitative information that can be used for diagnostic purposes. Measurements are acquired in specialized imaging modes that can detect tissue stiffness in response to an applied mechanical force (compression or shear wave). Ultrasound-based methods are of particular interest due to its many inherent advantages, such as wide availability including at the bedside and relatively low cost...
2017: Theranostics
https://www.readbyqxmd.com/read/28435080/investigating-mechanisms-of-tendon-damage-by-measuring-multi-scale-recovery-following-tensile-loading
#18
Andrea H Lee, Spencer E Szczesny, Michael H Santare, Dawn M Elliott
Tendon pathology is associated with damage. While tendon damage is likely initiated by mechanical loading, little is known about the specific etiology. Damage is defined as an irreversible change in the microstructure that alters the macroscopic mechanical parameters. In tendon, the link between mechanical loading and microstructural damage, resulting in macroscopic changes, is not fully elucidated. In addition, tendon damage at the macroscale has been proposed to initiate when tendon is loaded beyond a strain threshold, yet the metrics to define the damage threshold are not determined...
April 20, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28435070/siderophores-in-clinical-isolates-of-klebsiella-pneumoniae-promote-ciprofloxacin-resistance-by-inhibiting-the-oxidative-stress
#19
Wenli Zhang, Ying Zhang, Xinxin Wang, Fengshu Ding, Yingmei Fu, Jizi Zhao, Wuqi Song, Ogutu James Opiyo, Fengmin Zhang, Xiaobei Chen
To explore the relevance of and understand the potential mechanisms behind the production of siderophores by clinical isolates of K. pneumoniae and ciprofloxacin (CIP) resistance, we divided the K. pneumoniae isolates into two groups based on bacterial siderophores productin: high siderophore-yielding group (39 strains) and low siderophore-yielding group (38 strains). The rate of CIP resistance in K. pneumoniae (27/39 = 69.23%) from the high siderophore-yielding group was significantly higher than that (16/38 = 42...
April 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28434951/role-of-crf1-receptor-in-post-incisional-plasma-extravasation-and-nociceptive-responses-in-mice
#20
Asunción Romero, Juan-Antonio García-Carmona, María-Luisa Laorden, Margarita M Puig
The corticotropin-releasing factor (CRF) is involved in a number of physiological functions including pain perception. The purpose of this study was to evaluate the role of CRF1 receptor in the long-lasting post-surgical changes in somatic nociceptive thresholds and in local inflammatory responses, using genetically engineered mice lacking functional CRF1 receptor. Animals underwent a plantar incision under anaesthesia with remifentanil (80μg/kg s.c.) and sevoflurane. Mechanical thresholds (von Frey) and plasma extravasation (Evan's blue) were evaluated at different time points...
April 20, 2017: Toxicology and Applied Pharmacology
keyword
keyword
64388
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"