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Bio impedance

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https://www.readbyqxmd.com/read/28053662/development-of-a-genome-editing-crispr-cas9-system-in-thermophilic-fungal-myceliophthora-species-and-its-application-to-hyper-cellulase-production-strain-engineering
#1
Qian Liu, Ranran Gao, Jingen Li, Liangcai Lin, Junqi Zhao, Wenliang Sun, Chaoguang Tian
BACKGROUND: Over the past 3 years, the CRISPR/Cas9 system has revolutionized the field of genome engineering. However, its application has not yet been validated in thermophilic fungi. Myceliophthora thermophila, an important thermophilic biomass-degrading fungus, has attracted industrial interest for the production of efficient thermostable enzymes. Genetic manipulation of Myceliophthora is crucial for metabolic engineering and to unravel the mechanism of lignocellulose deconstruction...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28045439/design-and-development-of-non-contact-bio-potential-electrodes-for-pervasive-health-monitoring-applications
#2
Anthony J Portelli, Slawomir J Nasuto
For the advent of pervasive bio-potential monitoring, it will be necessary to utilize a combination of cheap, quick to apply, low-noise electrodes and compact electronics with wireless technologies. Once available, all electrical activity resulting from the processes of the human body could be actively and constantly monitored without the need for cumbersome application and maintenance. This could significantly improve the early diagnosis of a range of different conditions in high-risk individuals, opening the possibility for new treatments and interventions as conditions develop...
January 1, 2017: Biosensors
https://www.readbyqxmd.com/read/28029106/differences-between-graphene-and-graphene-oxide-in-gelatin-based-systems-for-transient-biodegradable-energy-storage-applications
#3
G Landi, A Sorrentino, S Iannace, H C Neitzert
A comparison between graphene flakes and graphene oxide as filler in gelatin based systems for low-cost transient biodegradable energy storage applications has been carried out. The two bio-composites have been prepared and characterized by rheological measurements, cyclic voltammetry measurements, chronopotentiometry measurements and impedance spectroscopy. Differences in dielectric and mechanical properties have been correlated to the different structural organizations determinate by the hydrophobic/hydrophilic character of the used filler...
February 3, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28024633/novel-impedimetric-dopamine-biosensor-based-on-boronic-acid-functional-polythiophene-modified-electrodes
#4
Muamer Dervisevic, Mehmet Senel, Emre Cevik
In this study we report a new, simple and first impedimetric biosensor based on 3-Thienyl boronic acid for dopamine detection. Biosensor electrode preparation is 1min long by simple electro-polymerization of 3-Thienyl boronic acid and copolymer Thiophene P(TBA0.50Th0.50). Strong interaction between dopamine and thin layer of boronic acid has provided bio-sensing electrode high selectivity and stability, linear range of 7.8 to 125μM, and detection limit of 0.3μM. Characterization and optimization studies were conducted using electrochemical impedance spectroscopy (EIS) and cyclic voltammogram (CV)...
March 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27941227/comparison-of-cardiac-magnetic-resonance-imaging-and-bio-impedance-spectroscopy-for-the-assessment-of-fluid-displacement-induced-by-external-leg-compression
#5
Salvatore Saporito, Silviu Dovancescu, Ingeborg H F Herold, Harrie C M van den Bosch, Hans C van Assen, Ronald M Aarts, Hendrikus H M Korsten, Massimo Mischi
Heart failure is marked by frequent hospital admissions, often as a consequence of pulmonary congestion. Current gold standard techniques for thoracic fluid measurement require invasive heamodynamic access and therefore they are not suitable for continuous monitoring. Changes in thoracic impedance (TI) may enable non-invasive early detection of congestion and prevention of unplanned hospitalizations. However, the usefulness of TI to assess thoracic fluid status is limited by inter-subject variability and by the lack of reliable normalization methods...
January 2017: Physiological Measurement
https://www.readbyqxmd.com/read/27916866/relationship-between-soft-drink-consumption-and-obesity-in-9-11-years-old-children-in-a-multi-national-study
#6
Peter T Katzmarzyk, Stephanie T Broyles, Catherine M Champagne, Jean-Philippe Chaput, Mikael Fogelholm, Gang Hu, Rebecca Kuriyan, Anura Kurpad, Estelle V Lambert, Jose Maia, Victor Matsudo, Timothy Olds, Vincent Onywera, Olga L Sarmiento, Martyn Standage, Mark S Tremblay, Catrine Tudor-Locke, Pei Zhao
The purpose of this study was to determine the association between regular (sugar containing) and diet (artificially sweetened) soft drink consumption and obesity in children from 12 countries ranging in levels of economic and human development. The sample included 6162 children aged 9-11 years. Information on soft drink consumption was obtained using a food frequency questionnaire. Percentage body fat (%BF) was estimated by bio-electrical impedance analysis, body mass index (BMI) z-scores were computed using World Health Organization reference data, and obesity was defined as a BMI > +2 standard deviations (SD)...
November 30, 2016: Nutrients
https://www.readbyqxmd.com/read/27892802/longitudinal-changes-and-correlations-of-bioimpedance-and-anthropometric-measurements-in-pregnancy-simple-possible-bed-side-tools-to-assess-pregnancy-evolution
#7
Gabriele Piuri, Enrico Ferrazzi, Camilla Bulfoni, Luciana Mastricci, Daniela Di Martino, Attilio Francesco Speciani
PURPOSE: The aim of this study was to assess longitudinal changes of bioimpedance analysis compared with anthropometric measurements in low-risk pregnant woman recruited in the first trimester and to observe possible differences in these indices in women who developed high-risk pregnancies. MATERIALS AND METHODS: Bioimpedance indices for the three trimesters of pregnancies were calculated separately for uneventful pregnancies delivered of newborns > the 10th centile...
December 14, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27875525/precision-medicine-in-cancer-challenges-and-recommendations-from-an-eu-funded-cervical-cancer-biobanking-study
#8
Sanne Samuels, Balazs Balint, Heiko von der Leyen, Philippe Hupé, Leanne de Koning, Choumouss Kamoun, Windy Luscap-Rondof, Ulrike Wittkop, Ksenia Bagrintseva, Marina Popovic, Atttila Kereszt, Els Berns, Gemma G Kenter, Ekaterina S Jordanova, Maud Kamal, Susy Scholl
BACKGROUND: Cervical cancer (CC) remains a leading cause of gynaecological cancer-related mortality worldwide. CC pathogenesis is triggered when human papillomavirus (HPV) inserts into the genome, resulting in tumour suppressor gene inactivation and oncogene activation. Collecting tumour and blood samples is critical for identifying these genetic alterations. METHODS: BIO-RAIDs is the first prospective molecular profiling clinical study to include a substantial biobanking effort that used uniform high-quality standards and control of samples...
December 6, 2016: British Journal of Cancer
https://www.readbyqxmd.com/read/27812588/scaling-down-for-a-broader-understanding-of-underwater-adhesives-a-case-for-the-caulobacter-crescentus-holdfast
#9
REVIEW
Alex Nyarko, Hazel Barton, Ali Dhinojwala
The adhesion of two materials in the presence of water is greatly impeded by a boundary layer of water between the adhesive and the adherend, resulting in adhesive failure of most synthetic adhesives; however, life evolved first in water and there are many aquatic organisms that have to overcome this impediment to underwater adhesion. For example, multicellular aquatic organisms like the mussel, sandcastle worm and the caddisfly larva employ well-studied adhesive mechanisms for sticking in the presence of water...
November 16, 2016: Soft Matter
https://www.readbyqxmd.com/read/27809470/hypoxia-mimicking-nanofibrous-scaffolds-promote-endogenous-bone-regeneration
#10
Qingqing Yao, Yangxi Liu, Jianning Tao, Keith M Baumgarten, Hongli Sun
Utilizing biomimetic materials to potentiate endogenous cell growth or signaling is superior to relying on exogenous cells or signals for bone formation. Desferoxamine (DFO), which is a hypoxia-mimetic agent that chelates iron (Fe(3+)), mimics hypoxia to encourage bone healing. However, high cytotoxicity, off-target effects, and the short half-life of DFO have significantly impeded its further applications. We mitigated these side effects by locally immobilizing DFO onto a gelatin nanofibrous (GF) scaffold that retained DFO's ability to chelate Fe(3+)...
November 30, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27806471/variations-in-vitamin-d-receptor-gene-adiposity-phenotypes-and-metabolic-profile-in-overweight-women-with-hypovitaminosis-d
#11
Samira Ebrahimof, Hamid Zand, Sakineh Shab-Bidar, Marjan Zarif Yeganeh, Farzaneh Jahangiri, Katayoun Pourvali, Maryam Sadat Daneshpour, Mehdi Hedayati
BACKGROUND: The possible role of vitamin D receptor (VDR) genotypes in determining adiposity phenotypes and cardiovascular risk factors has been suggested previously. The aim of this study was to evaluate the associations of the VDR gene variants with adiposity phenotypes and metabolic profile in Iranian overweight women with hypovitaminos is D. METHODS: Three VDR variants including FokI (rs2228570), BsmI (rs1544410) and rs757343 were detected using PCR-sequencing...
June 30, 2016: Global Journal of Health Science
https://www.readbyqxmd.com/read/27770942/an-electrical-bio-chip-to-transfer-and-detect-electromagnetic-stimulation-on-the-cells-based-on-vertically-aligned-carbon-nanotubes
#12
Saeed Rafizadeh-Tafti, Mohammad Hossein Haqiqatkhah, Mehrdad Saviz, Mohsen Janmaleki, Reza Faraji Dana, Somayeh Zanganeh, Mohammad Abdolahad
A highly sensitive impedimetric bio-chip based on vertically aligned multiwall carbon nanotubes (VAMWCNTs), was applied in direct interaction with lung cancer cells. Our tool provided both inducing and monitoring the bioelectrical changes in the cells initiated by electromagnetic (EM) wave stimulation. EM wave of 940MHz frequency with different intensities was used. Here, wave ablation might accumulate electrical charge on the tips of nanotubes penetrated into cell's membrane. The charge might induce ionic exchanges into the cell and cause alterations in electrical states of the membrane...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27764980/which-echocardiographic-parameter-is-a-better-marker-of-volume-status-in-hemodialysis-patients
#13
Tahereh Sabaghian, Bahareh Hajibaratali, Shiva Samavat
AIM: Bio-impedance analysis (BIA) is a preferred method for estimating the volume status. However, it cannot be utilized in daily practice. Since the assessment of the volume status is important and challenging for hemodialysis (HD) patients, the aim of study was to determine the volume status in chronic HD patients using echocardiographic parameters and assess its correlation with BIA. METHODS: In this cross-sectional analysis, echocardiography and BIA were performed on 30 chronic HD patients 30 min before and 30 min after dialysis...
November 2016: Renal Failure
https://www.readbyqxmd.com/read/27718579/superior-catalytic-performance-of-gold-nanoparticles-within-small-cross-linked-lysozyme-crystals
#14
Mingyue Liu, Libing Wang, Renliang Huang, Yanjun Yu, Rongxin Su, Wei Qi, Zhimin He
Bionanomaterials synthesized by bio-inspired templating methods have emerged as a novel class of composite materials with varied applications in catalysis, detection, drug delivery, and biomedicine. In this study, two kinds of cross-linked lysozyme crystals (CLLCs) of different sizes were applied for the in situ growth of Au nanoparticles (AuNPs). The resulting composite materials were characterized by light microscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy...
October 8, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/27695132/rough-gold-electrodes-for-decreasing-impedance-at-the-electrolyte-electrode-interface
#15
Anil Koklu, Ahmet C Sabuncu, Ali Beskok
Electrode polarization at the electrolyte/electrode interface is often undesirable for bio-sensing applications, where charge accumulated over an electrode at constant potential causes large potential drop at the interface and low measurement sensitivity. In this study, novel rough electrodes were developed for decreasing electrical impedance at the interface. The electrodes were fabricated using electrochemical deposition of gold and sintering of gold nanoparticles. The performances of the gold electrodes were compared with platinum black electrodes...
July 1, 2016: Electrochimica Acta
https://www.readbyqxmd.com/read/27695058/monitoring-in-real-time-the-formation-and-removal-of-biofilms-from-clinical-related-pathogens-using-an-impedance-based-technology
#16
Diana Gutiérrez, Claudio Hidalgo-Cantabrana, Ana Rodríguez, Pilar García, Patricia Ruas-Madiedo
Bacteria found in diverse ecosystems grow in a community of aggregated cells that favors their survival and colonization. Different extracellular polymeric substances are used to entrap this multispecies community forming a biofilm, which can be associated to biotic and abiotic surfaces. This widespread and successful way of bacterial life, however, can lead to negative effects for human activity since many pathogen and spoiling bacteria form biofilms which are not easy to eradicate. Therefore, the search for novel anti-biofilm bio-active molecules is a very active research area for which simple, reliable, and fast screening methods are demanded...
2016: PloS One
https://www.readbyqxmd.com/read/27683834/is-handgrip-strength-normalized-to-body-weight-a-useful-tool-to-identify-dynapenia-and-functional-incapacity-in-post-menopausal-women
#17
Maude Dulac, Guy El Hajj Boutros, Charlotte Pion, Sébastien Barbat-Artigas, Gilles Gouspillou, Mylène Aubertin-Leheudre
Objective: To investigate whether handgrip strength normalized to body weight could be a useful clinical tool to identify dynapenia and assess functional capacity in post-menopausal women. Method: A total of 136 postmenopausal women were recruited. Body composition (Dual Energy X-ray Absorptiometry [DEXA], Bio-electrical Impedence Analysis [BIA]), grip strength (dynamometer) and functional capacity (senior fitness tests) were evaluated. Dynapenia was established according to a handgrip strength index (handgrip strength divided by body weight (BW) in Kg/KgBW) obtained from a reference population of young women: Type I dynapenic (<0...
November 2016: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/27680816/g5-12-week-cardiovascular-profiles-differ-between-patients-with-essential-hypertension-gestational-hypertension-late-preeclampsia-and-intra-uterine-growth-retardation
#18
S Vonck, J Oben, A S Staelens, D Lanssens, K Tomsin, W Gyselaers
INTRODUCTION: Maternal cardiovascular adaptations are mandatory for a normal course of pregnancy. Disturbed adaptations predispose to gestational complications further in pregnancy such as hypertension disorders and/or fetal growth restriction. We aim to explore the early gestational cardiovascular profile in uncomplicated pregnancy, in gestational hypertensive disorders and isolated intra-uterine growth retardation. METHODS: Cardiovascular assessments were done using a standard protocol with impedance cardiography (Niccomo, SonoSite, MedisMedinizinischeMesstechnik GmbH, Ilmenau, Germany) and bio-impedance (Maltron BIOSCAN 920-II; Maltron International LTD, Essex, UK) around 12 weeks of gestation...
August 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27664695/a-comprehensive-approach-for-milk-adulteration-detection-using-inherent-bio-physical-properties-as-universal-markers-towards-a-miniaturized-adulteration-detection-platform
#19
Suryasnata Tripathy, Aniket Ramesh Ghole, Khandavalli Deep, Siva Rama Krishna Vanjari, Shiv Govind Singh
This paper proposes a novel milk quality detection approach based on utilization of inherent biophysical properties as 'markers' for adulteration. Unlike the traditional adulterant-specific approaches, this method is generic and universal. It exploits the change in innate milk properties, such as electrical conductivity and pH, upon addition of adulterants as a transduction mechanism for detecting milk adulteration. In this work, adulteration with more than 10 commercially known hazardous adulterants is detected by monitoring the changes in milk electrical conductivity and pH...
February 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27648418/socio-cultural-factors-in-the-access-of-women-to-hiv-aids-prevention-and-treatment-services-in-south-southern-nigeria
#20
Edlyne Anugwom, Kenechukwu Anugwom
BACKGROUND: The South-southern zone of Nigeria is one of the zones in the country that has reported consistent high prevalent rates of HIV/AIDS pandemic in the last decade. In spite of bio-medical reasons adduced for the spread of the pandemic, socio-cultural factors may be major issues in the access to both prevention and treatment services especially for women. Hence, this study investigated the socio-cultural factors, which influence the access of women to HIV/AIDS prevention and treatment services in Nigeria...
June 2016: Iranian Journal of Public Health
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