keyword
MENU ▼
Read by QxMD icon Read
search

Hap

keyword
https://www.readbyqxmd.com/read/28922634/functionalisation-of-ti6al4v-and-hydroxyapatite-surfaces-with-combined-peptides-based-on-kklpda-and-eeeeeeee-peptides
#1
Gabriela Melo Rodriguez, James Bowen, David Grossin, Besim Ben-Nissan, Artemis Stamboulis
Surface modifications are usually performed on titanium alloys to improve osteo-integration and surface bioactivity. Modifications such as alkaline and acid etching, or coating with bioactive materials such as hydroxyapatite, have previously been demonstrated. The aim of this work is to develop a peptide with combined titanium oxide and hydroxyapatite binders in order to achieve a biomimetic hydroxyapatite coating on titanium surfaces. The technology would also be applicable for the functionalisation of titanium and hydroxyapatite surfaces for selective protein adsorption, conjugation of antimicrobial peptides, and adsorption of specialised drugs for drug delivery...
September 9, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28921832/synthesis-and-bioactivity-assessment-of-high-silica-content-quaternary-glasses-with-ca-p-ratios-of-1-5-and-1-67-made-by-a-rapid-sol-gel-process
#2
Basam A E Ben-Arfa, Hugo R Fernandes, Isabel M Miranda Salvado, José M F Ferreira, Robert C Pullar
Sol-gel glasses in quaternary silica-sodium-calcium-phosphorous systems have been synthesised using a rotary evaporator for rapid drying without ageing. This novel fast drying method drastically decreases the total drying and ageing time from several weeks to only 1 hour, thus overcoming a serious drawback in sol-gel preparation procedures for bioglasses. This work investigates the bioactivity behaviour of two glasses synthesised by this fast method, with Ca:P ratios of 1.5, and 1.67. X-ray diffraction (XRD), Inductive coupled plasma (ICP), Fourier-transform infrared (FTIR) and Raman spectroscopy were used to confirm the bioactivity of the synthesised powders...
September 16, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28917876/preparation-of-chitosan-hydroxyapatite-composite-mono-fiber-using-coagulation-method-and-their-mechanical-properties
#3
Takuma Okada, Yuta Nobunaga, Toshiisa Konishi, Tomohiko Yoshioka, Satoshi Hayakawa, Maria Ascensão Lopes, Toshiki Miyazaki, Yuki Shirosaki
Autograft has been carried out for anterior cruciate ligament (ACL) reconstruction surgery. However, it has negative aspect because patients lose their healthy ligaments from other part. We focus on a chitosan-hydroxyapatite (HAp) composite fiber as a scaffold of ligament regeneration. Chitosan- HAp composite fiber was made by using coagulation method. Chitosan-NaH2PO4 solution was coagulated with coagulation bath including calcium ion to get the mono-fiber and then treated with sodium hydroxide solution to form HAp in fiber matrix...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28906099/one-dimension-hydroxyapatite-nanostructures-with-tunable-length-for-efficient-stem-cell-differentiation-regulation
#4
Baojin Ma, Shan Zhang, Feng Liu, Jiazhi Duan, Shicai Wang, Jing Han, Yuanhua Sang, Xiaoqiang Yu, Dong Li, Wei Tang, Shaohua Ge, Hong Liu
It is well-accepted that most osteogenic differentiation processes do need growth factors assistance to improve efficiency. As a material cue, hydroxyapatite (HAp) can promote osteogenic differentiation of stem cells only in a way. Up to now, rare work related to the relationship between HAp nanostructures and stem cells in osteogenic differentiation process without the assistance of growth factors has been reported. In this study, one dimension (1D) HAp nanostructures with tunable length were synthesized by an oleic acid assisted solvothermal method by adjusting the alcohol/water ratio (η)...
September 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28905291/morphology-effect-of-nano-hydroxyapatite-as-a-drug-carrier-of-methotrexate
#5
Haina Sun, Shanshan Liu, Xiongfeng Zeng, Xianguang Meng, Lina Zhao, Yizao Wan, Guifu Zuo
In this study, morphology effect of nano-hydroxyapatite as a drug carrier was investigated for the first time. Hydroxyapatite/methotrexate (HAp/MTX) hybrids with different morphologies were successfully prepared in situ using polyethylene glycol (PEG) as a template. SEM, TEM, XRD and FTIR results confirmed that the hybrids of different morphologies (laminated, rod-like and spherical) with similar phase composition and functional groups were obtained by changing the preparation parameters. UV-Vis spectroscopy was used to identify the drug loading capacity and drug release mechanism of the three hybrids with different morphologies...
September 13, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28902456/safety-and-efficacy-of-hydroxyapatite-scaffold-in-the-prevention-of-jaw-osteonecrosis-in-vivo
#6
Adriana Duarte de Almeida, Fernanda Gomes Leite, Marco Vinícius Chaud, Márcia de Araújo Rebelo, Liliane Cristine Ferreira de Souza Borges, Fabia Judice Marques Viroel, Alessandre Hataka, Denise Grotto
Two scaffolds of chitosan/sodium alginate/hydroxyapatite (Ch/NaAlg/Hap) 1:1:0.2 and 1:1:0.6 were evaluated in the prevention of bisphosphonate-induced jaw osteonecrosis. Two groups of rats (n = 24, according to the euthanasia time: 15 or 30 days after the last Zoledronic acid (ZA) administration) were subdivided in four subgroups (n = 6): I - Control (saline + teeth extraction); II - ZA 0.6 mg/kg + teeth extraction; III - ZA + teeth extraction + scaffold 1:1:0.2; IV - ZA + teeth extraction + scaffold 1:1:0...
September 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28899816/enzyme-crosslinked-gene-activated-matrix-for-the-induction-of-mesenchymal-stem-cells-in-osteochondral-tissue-regeneration
#7
Yi-Hsuan Lee, Hsi-Chin Wu, Chia-Wei Yeh, Chen-Hsiang Kuan, Han-Tsung Liao, Horng-Chaung Hsu, Jui-Che Tsai, Jui-Sheng Sun, Tzu-Wei Wang
The development of osteochondral tissue engineering is an important issue for the treatment of traumatic injury or aging associated joint disease. However, the different compositions and mechanical properties of cartilage and subchondral bone show the complexity of this tissue interface, making it challenging for the design and fabrication of osteochondral graft substitute. In this study, a bilayer scaffold is developed to promote the regeneration of osteochondral tissue within a single integrated construct...
September 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28898283/sustained-effectiveness-and-cost-effectiveness-of-the-healthy-activity-programme-a-brief-psychological-treatment-for-depression-delivered-by-lay-counsellors-in-primary-care-12-month-follow-up-of-a-randomised-controlled-trial
#8
Benedict Weobong, Helen A Weiss, David McDaid, Daisy R Singla, Steven D Hollon, Abhijit Nadkarni, A-La Park, Bhargav Bhat, Basavraj Katti, Arpita Anand, Sona Dimidjian, Ricardo Araya, Michael King, Lakshmi Vijayakumar, G Terence Wilson, Richard Velleman, Betty R Kirkwood, Christopher G Fairburn, Vikram Patel
BACKGROUND: The Healthy Activity Programme (HAP), a brief behavioural intervention delivered by lay counsellors, enhanced remission over 3 months among primary care attendees with depression in peri-urban and rural settings in India. We evaluated the sustainability of the effects after treatment termination, the cost-effectiveness of HAP over 12 months, and the effects of the hypothesized mediator of activation on clinical outcomes. METHODS AND FINDINGS: Primary care attendees aged 18-65 years screened with moderately severe to severe depression on the Patient Health Questionnaire 9 (PHQ-9) were randomised to either HAP plus enhanced usual care (EUC) (n = 247) or EUC alone (n = 248), of whom 95% completed assessments at 3 months, and 91% at 12 months...
September 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28895302/catalytic-upgrading-of-ethanol-to-n-butanol-a-progress-in-catalyst-development
#9
Xianyuan Wu, Geqian Fang, Yuqin Tong, Dahao Jiang, Zhe Liang, Wenhua Leng, Liu Liu, Pengxiang Tu, Hongjing Wang, Jun Ni, Xiaonian Li
In view that n-butanol as fuel additive has more advantageous physico-chemical properties compared to ethanol, ethanol valorization to n-butanol via homogeneous or heterogeneous catalysis has received great attention over the last decades both in the scientific and industrial fields. This paper reviewed the recent progress in catalyst development for upgrading ethanol to n-butanol, which involves homogeneous catalysts such as Iridium and Ruthenium complexes catalysts and heterogeneous catalysts mainly including metal oxides, hydroxyapatite (HAP) and especially supported metal catalysts...
September 12, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28893328/plasticity-in-host-utilization-by-two-host-associated-populations-of-aphis-gossypii-glover
#10
A K Barman, K R Gadhave, B Dutta, R Srinivasan
Biological and morphological plasticity in polyphagous insect herbivores allow them to exploit diverse host plant species. Geographical differences in resource availability can lead to preferential host exploitation and result in inconsistent host specialization. Biological and molecular data provide insights into specialization and plasticity of such herbivore populations. In agricultural landscapes, Aphis gossypii encounters several crop and non-crop hosts, which exist in temporal and spatial proximity. We investigated the host-specialization of two A...
September 12, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28890434/international-ers-esicm-escmid-alat-guidelines-for-the-management-of-hospital-acquired-pneumonia-and-ventilator-associated-pneumonia-guidelines-for-the-management-of-hospital-acquired-pneumonia-hap-ventilator-associated-pneumonia-vap-of-the-european-respiratory
#11
Antoni Torres, Michael S Niederman, Jean Chastre, Santiago Ewig, Patricia Fernandez-Vandellos, Hakan Hanberger, Marin Kollef, Gianluigi Li Bassi, Carlos M Luna, Ignacio Martin-Loeches, J Artur Paiva, Robert C Read, David Rigau, Jean François Timsit, Tobias Welte, Richard Wunderink
The most recent European guidelines and task force reports on hospital-acquired pneumonia (HAP) and ventilator-associated pneumonia (VAP) were published almost 10 years ago. Since then, further randomised clinical trials of HAP and VAP have been conducted and new information has become available. Studies of epidemiology, diagnosis, empiric treatment, response to treatment, new antibiotics or new forms of antibiotic administration and disease prevention have changed old paradigms. In addition, important differences between approaches in Europe and the USA have become apparent...
September 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28888169/green-synthesis-of-si-incorporated-hydroxyapatite-using-sodium-metasilicate-as-silicon-precursor-and-in-vitro-antibiotic-release-studies
#12
P Abinaya Sindu, Elayaraja Kolanthai, R V Suganthi, K Thanigai Arul, E Manikandan, Luiz H Catalani, S Narayana Kalkura
The aim of the current study is to synthesize nanosized silicon incorporated HAp (Si-HAP) using sodium metasilicate as the silicon source. The sol-gel derived samples were further subjected to microwave irradiation. Incorporation of Si into HAp did not alter the HAp phase, as confirmed by the X-ray diffraction analysis (XRD). Moreover, variation in the lattice parameters of the Si-incorporated HAp indicates that Si is substituted into the HAp lattice. The decrease in the intensity of the peaks attributed to hydroxyl groups, which appeared in the FTIR and Raman spectra of Si-HAp, further confirms the Si substitution in HAp lattices...
August 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28888127/environmental-injustice-and-sexual-minority-health-disparities-a%C3%A2-national-study-of-inequitable-health-risks-from-air-pollution-among-same-sex-partners
#13
Timothy W Collins, Sara E Grineski, Danielle X Morales
Air pollution is deleterious to human health, and numerous studies have documented racial and socioeconomic inequities in air pollution exposures. Despite the marginalized status of lesbian, gay, bisexual, and transgender (LGBT) populations, no national studies have examined if they experience inequitable exposures to air pollution. This cross-sectional study investigated inequities in the exposure of same-sex partner households to hazardous air pollutants (HAPs) in the US. We examined cancer and respiratory risks from HAPs across 71,207 census tracts using National Air Toxics Assessment and US Census data...
September 6, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28887994/luminomagnetic-eu-3-and-dy-3-doped-hydroxyapatite-for-multimodal-imaging
#14
Annemarie Tesch, Christoph Wenisch, Karl-Heinz Herrmann, Jürgen R Reichenbach, Paul Warncke, Dagmar Fischer, Frank A Müller
Multimodal imaging has recently attracted much attention due to the advantageous combination of different imaging modalities, like photoluminescence (PL) and magnetic resonance imaging (MRI). In the present study, luminescent and magnetic hydroxyapatites (HAp) were prepared via doping with europium (Eu(3+)) and dysprosium (Dy(3+)), respectively. Co-doping of Eu(3+) and Dy(3+) was used to combine the desired physical properties. Both lanthanide ions were successfully incorporated in the HAp crystal lattice, where they preferentially occupied calcium(I) sites...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28887975/synthesis-of-silk-fibroin-g-paa-composite-using-h2o2-hrp-and-characterization-of-the-in-situ-biomimetic-mineralization-behavior
#15
Buguang Zhou, Min He, Ping Wang, Haitian Fu, Yuanyuan Yu, Qiang Wang, Xuerong Fan
Silk fibroin (SF) as a bioactive protein can offer growth substrates for hydroxyapatite (HAp) deposition. In the current work, graft copolymerization of acrylic acid (AA) onto fibroin chains was carried out using hydrogen peroxide-horseradish peroxidase (H2O2-HRP) catalytic system, SF-g-polyacrylic acid (PAA) membranes was prepared subsequently, followed by in situ biomimetic mineralization in the Ca/P solutions, aiming at promoting the deposition of HAp and endowing the fibroin-based biocomposite with enhanced bioactivity...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28887960/electrochemical-preparation-and-characterization-of-pnipam-hap-scaffolds-for-bone-tissue-engineering
#16
Charlene Aparecida Ribeiro, Marcos Vinicius Surmani Martins, Ana Helena Bressiani, José Carlos Bressiani, Maria Elena Leyva, Alvaro Antonio Alencar de Queiroz
In the last decade, a variety of methods for fabrication of three-dimensional biomimetic scaffolds based on hydrogels have been developed for tissue engineering. However, many methods require the use of catalysts which compromises the biocompatibility of the scaffolds. The electrochemical polymerization (ECP) of acrylic monomers has received an increased attention in recent years due to its versatility in the production of highly biocompatible coatings for the electrodes used in medical devices. The main aim of this work was the use of ECP as scaffold fabrication technique to produce highly porous poly(N-isopropylacrylamide) (PNIPAM)/hydroxyapatite (HAp) composite for bone tissue regeneration...
December 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28886268/implanted-hair-follicle-associated-pluripotent-hap-stem-cells-encapsulated-in-polyvinylidene-fluoride-membrane-cylinders-promote-effective-recovery-of-peripheral-nerve-injury
#17
Aiko Yamazaki, Kohya Obara, Natsuko Tohgi, Kyoumi Shirai, Sumiyuki Mii, Yuko Hamada, Nobuko Arakawa, Ryoichi Aki, Robert M Hoffman, Yasuyuki Amoh
Hair follicle-associated-pluripotent (HAP) stem cells are located in the bulge area of the hair follicle, express the stem-cell marker, nestin, and have been shown to differentiate to nerve cells, glial cells, keratinocytes, smooth muscle cells, cardiac muscle cells, and melanocytes. Transplanted HAP stem cells promote the recovery of peripheral nerve and spinal cord injuries and have the potential for heart regeneration as well. In the present study, we implanted mouse HAP stem-cell spheres encapsulated in polyvinylidene fluoride (PVDF)-membrane cylinders into the severed sciatic nerve of immunocompetent and immunocompromised (nude) mice...
September 8, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28885064/araniella-cucurbitina-the-first-molecular-evidence-of-a-palearctic-species-of-genus-araniella-inhabiting-india
#18
Ankita Rajpoot, Ved Prakash Kumar, Archana Bahuguna, Pallab Maity, Dhyanendra Kumar
The present study represents first genetic record of single spider species Araniella cucurbitina, genus Araniella from Uttarakhand, India. There are 12 identified species under Araniella genus and they are distributed in Palearctic region. Here, we used known N = 47 (2 from present study and 45 from GenBank) cytochrome oxidase 1 (CO1) sequences of A. cucurbitina representing seven different geographical groups, additionally 23 sequences of eight Araniella species were used for phylogenetic relationship...
September 8, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28882012/empirical-treatment-of-adults-with-hospital-acquired-pneumonia-lights-and-shadows-of-the-2016-clinical-practice-ats-idsa-guidelines
#19
REVIEW
M Vacas-Córdoba, C Cardozo-Espinola, P Puerta-Alcalde, C Cilloniz, A Torres, C García-Vidal
Hospital-acquired pneumonia (HAP) is a common cause of nosocomial infection associated with significant morbidity and mortality. New clinical practice guidelines for the management of adults with hospital-acquired pneumonia have been published in 2016 by the Infectious Diseases Society of America (IDSA) and the American Thoracic Society (ATS). This review focuses on the recent recommendations and their limitations. We also focus on new therapeutic options that might improve the treatment and outcomes of these patients...
September 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28880313/3d-printed-poly-%C3%AE%C2%B5-caprolactone-scaffolds-modified-with-hydroxyapatite-and-poly-propylene-fumarate-and-their-effects-on-the-healing-of-rabbit-femur-defects
#20
Senem Buyuksungur, Tugba Endogan Tanir, Arda Buyuksungur, Ezgi Irem Bektas, Gamze Torun Kose, Deniz Yucel, Tahsin Beyzadeoglu, Engin Cetinkaya, Cagri Yenigun, Ergin Tönük, Vasif Hasirci, Nesrin Hasirci
A large variety of approaches have been used to treat large and irregular shaped bone defects with less than optimal success due to material or design issues. In recent years patient specific constructs prepared by additive manufacturing provided a solution to the need for shaping implants to fit irregular defects in the surgery theater. In this study, cylindrical disks of poly(ε-caprolactone) (PCL) were printed by fused deposition modeling and modified with nanohydroxyapatite (HAp) and poly(propylene fumarate) (PPF) to create a mechanically strong implant with well-defined pore size and porosity, controllable surface hydrophilicity (with PPF) and osteoconductivity (with HAp)...
September 7, 2017: Biomaterials Science
keyword
keyword
35160
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"