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https://www.readbyqxmd.com/read/28532091/design-and-fabrication-of-carbon-fibers-with-needle-like-nano-ha-coating-to-reinforce-granular-nano-ha-composites
#1
Xudong Wang, Xueni Zhao, Li Zhang, Wanying Wang, Jing Zhang, Fuzhen He, Jianjun Yang
Carbon fibers (CFs) with needle-like nano-hydroxyapatite (nHA) coating were first used as reinforcing materials named nHA-CFs to improve the mechanical properties of pure HA. A powder mixture containing nHA-CFs and granular nano-HA (gHA) was directly sintered by hot pressing at appropriate sintering pressure and temperature. A three-phase nHA-CFs/gHA composite was designed, fabricated, and used as an artificial bone. Results show that the bending strengths of the nHA-CFs/gHA composite are approximately 41.1% and 59...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532090/in-situ-synthesis-of-bilayered-gradient-poly-vinyl-alcohol-hydroxyapatite-composite-hydrogel-by-directional-freezing-thawing-and-electrophoresis-method
#2
Cui Su, Yunlan Su, Zhiyong Li, Muhammad Abdul Haq, Yong Zhou, Dujin Wang
Bilayered poly(vinyl alcohol) (PVA)/hydroxyapatite (HA) composite hydrogels with anisotropic and gradient mechanical properties were prepared by the combination of directional freezing-thawing (DFT) and electrophoresis method. Firstly, PVA hydrogels with aligned channel structure were prepared by the DFT method. Then, HA nanoparticles were in situ synthesized within the PVA hydrogels via electrophoresis. By controlling the time of the electrophoresis process, a bilayered gradient hydrogel containing HA particles in only half of the gel region was obtained...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532051/chitosan-folate-decorated-carbon-nanotubes-for-site-specific-lung-cancer-delivery
#3
Rahul Pratap Singh, Gunjan Sharma, Sonali, Sanjay Singh, Shreekant Bharti, Bajarangprasad L Pandey, Biplob Koch, Madaswamy S Muthu
The aim of this work was to formulate chitosan-folate conjugated multi-walled carbon nanotubes for the lung cancer targeted delivery of docetaxel. The chitosan-folate conjugate was synthesized and the conjugation was confirmed by Fourier transform infrared spectroscopy. The multi-walled carbon nanotubes were characterized for their particle size, polydispersity, zeta potential, surface morphology, drug encapsulation efficiency and in vitro release study. The in vitro cellular uptake, cytotoxicity, and cell cycle analysis of the docetaxel/coumarin-6 loaded multi-walled carbon nanotubes were carried out to compare the effectiveness of the formulations...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532020/ph-responsive-drug-release-and-real-time-fluorescence-detection-of-porous-silica-nanoparticles
#4
Xu Zhang, Yamin Wang, Yanbao Zhao, Lei Sun
In this work, pH-sensitive "dual-switch" porous silica (pSiO2) nanoparticles (NPs) were constructed for drug delivery. Poly(acrylic acid) (PAA) was grafting onto the internal and external surfaces of amino groups functionalized porous silica (pSiO2-NH2) NPs by the amidation between the amino groups and the carboxyl groups of PAA for pH triggered drug release. The resultant pSiO2/PAA NPs have an average diameter of 50-60nm and high specific surface area (914m(2)·g(-1)). To improve the loading capacity, ZnO quantum dots (QDs) were used to block the partial pores of pSiO2/PAA and the loading capacity reached to 28% for methotrexate (MTX) model drug...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531910/extracranial-carotid-disease-and-effect-of-intra-arterial-treatment-in-patients-with-proximal-anterior-circulation-stroke-in-mr-clean
#5
Olvert A Berkhemer, Jordi Borst, Manon Kappelhof, Albert J Yoo, Lucie A van den Berg, Puck S S Fransen, Debbie Beumer, Wouter J Schonewille, Paul J Nederkoorn, Marieke J H Wermer, Henk A Marquering, Hester F Lingsma, Yvo B W E M Roos, Robert J van Oostenbrugge, Diederik W J Dippel, Wim H van Zwam, Charles B L M Majoie, Bart J Emmer, Aad van der Lugt
Background: The presence of extracranial carotid disease (ECD) is associated with less favorable clinical outcomes a in patients with acute ischemic stroke caused by intracranial proximal occlusion. Acute intra-arterial treatment (IAT) in the setting of extracranial and intracranial lesions is considered challenging, and whether it yields improved outcomes remains uncertain. Objective: To examine whether the presence of ECD modified the effect of IAT for intracranial proximal anterior circulation occlusion...
May 23, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/28531885/fetal-treatment-2017-the-evolution-of-fetal-therapy-centers-a-joint-opinion-from-the-international-fetal-medicine-and-surgical-society-ifmss-and-the-north-american-fetal-therapy-network-naftnet
#6
Anita J Moon-Grady, Ahmet Baschat, Darrell Cass, Mahesh Choolani, Joshua A Copel, Timothy M Crombleholme, Jan Deprest, Stephen P Emery, Mark I Evans, Francois I Luks, Mary E Norton, Greg Ryan, Kuojen Tsao, Ross Welch, Michael Harrison
More than 3 decades ago, a small group of physicians and other practitioners active in what they called "fetal treatment" authored an opinion piece outlining the current status and future challenges anticipated in the field. Many advances in maternal, neonatal, and perinatal care and diagnostic and therapeutic modalities have been made in the intervening years, yet a thoughtful reassessment of the basic tenets put forth in 1982 has not been published. The present effort will aim to provide a framework for contemporary redefinition of the field of fetal treatment, with a brief discussion of the necessary minimum expertise and systems base for the provision of different types of interventions for both the mother and fetus...
May 23, 2017: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/28531877/folate-n-acetyl-glucosamine-conjugated-mesoporous-silica-nanoparticles-for-targeting-breast-cancer-cells-a-comparative-study
#7
Pramod Kumar, Prajakta Tambe, Kishore M Paknikar, Virendra Gajbhiye
Folate receptors (FR) have been well recognized as a marker to target nano-sized carriers for cancer diagnosis and therapy. In contrast, influx transport systems (e.g. GLUT transporters) that transport essential amino acids and nutrients to cancer cells have not been exploited much for targeted delivery. In this study, folic acid- or n-acetyl glucosamine- functionalized mesoporous silica nanoparticles loaded with doxorubicin (DOX-FA-MSNPs or DOX-NAG-MSNPs) were prepared, characterized and compared for targeting along with cytotoxicity towards MCF-7 and MDA-MB-231 human breast cancer cells...
May 11, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28531830/isotope-coded-derivatization-based-lc-esi-ms-ms-methods-using-a-pair-of-novel-reagents-for-quantification-of-hydroxycinnamic-acids-and-hydroxybenzoic-acids-in-fermented-brown-rice-product
#8
Shoujiro Ogawa, Kiriko Takafuji, Sumi Tsubuku, Yukiko Horie, Shigeo Ikegawa, Tatsuya Higashi
Hydroxycinnamic acids (HCAs) and hydroxybenzoic acids (HBAs) are antioxidant phytochemicals found in rice and effective for the prevention of human diseases including cancer. FBRA, which is a functional food manufactured by fermenting brown rice and rice bran with Aspergillus oryzae, has been demonstrated to have chemopreventive effects against carcinogenesis in various organs. In this study, we developed methods for the relative and absolute quantification of ferulic acid, sinapic acid, caffeic acid, protocatechuic acid and syringic acid in the FBRA and raw material (RM; unfermented brown rice and rice bran) samples by LC/ESI-MS/MS combined with derivatization using a newly developed reagent, N-(2-aminoethyl)-4-(diethylamino)benzamide (ADB) and its deuterium-coded analog, d-ADB...
May 2, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28531787/clinical-nutrition-in-primary-care-an-evaluation-of-resident-physicians-attitudes-and-self-perceived-proficiency
#9
Sarah L Han, Reto Auer, Jacques Cornuz, Pedro Marques-Vidal
BACKGROUND & AIMS: There is little information regarding the impact of clinical nutrition training among medical residents. We aimed to evaluate the attitudes, self-perceived proficiency and knowledge of Swiss residents regarding clinical nutrition. METHODS: Cross-sectional study conducted between June and September 2014 in two medical education facilities located in Lausanne, Switzerland. Attitudes, self-perceived proficiency and knowledge regarding clinical nutrition were assessed by questionnaire...
October 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531766/development-and-initial-validation-of-a-cessation-fatigue-scale
#10
Amanda R Mathew, Bryan W Heckman, Ellen Meier, Matthew J Carpenter
BACKGROUND: Smoking cessation fatigue, or tiredness of attempting to quit smoking, has been posited as a latent construct encompassing loss of motivation, loss of hope in cessation success, decreased self-efficacy, and exhaustion of self-control resources. Despite the potential clinical impact of characterizing cessation fatigue, there is currently no validated measure to assess it. Using a rational scale development approach, we developed a cessation fatigue measure and examined its reliability and construct validity in relation to a) smokers' experience of a recently failed quit attempt (QA) and b) readiness to engage in a subsequent QA...
May 17, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28531765/toxicokinetics-of-zinc-oxide-nanoparticles-and-zinc-ions-in-the-earthworm-eisenia-andrei
#11
Zuzanna M Świątek, Cornelis A M van Gestel, Agnieszka J Bednarska
The toxicokinetics of zinc in the earthworm Eisenia andrei was investigated following exposure for 21 days to ionic zinc (ZnCl2) or zinc oxide nanoparticles (ZnO-NPs) in Lufa 2.2 soil, followed by 21 days elimination in clean soil. Two concentrations were tested for both ZnCl2 (250 and 500μg Zn g(-1)) and ZnO-NPs (500 and 1000μg Zn g(-1)), corresponding to EC25 and EC50 for effects on reproduction. Based on the measured internal Zn concentrations in the earthworms over time of exposure, the kinetics parameters ka - assimilation rate constant (gsoil g(-1)body weight day(-1)) and ke - elimination rate constant (day(-1)) were estimated using a one-compartment model for either total Zn concentrations in the soil or porewater Zn concentrations...
May 19, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28531454/preliminary-validation-of-the-malay-yale-food-addiction-scale-factor-structure-and-item-analysis-in-an-obese-population
#12
Yogarabindranath Swarna Nantha, Norafidza Ashiquin Abd Patah, Mahalakshmi Ponnusamy Pillai
BACKGROUND AND AIMS: Researchers suggest that the rise in obesity rates may be explained by the addictive properties of certain types of food. In view of the growing obesity epidemic in South-East Asia, there is a need for a psychometric tool to assess the concept of food addiction amongst high-risk populations. The objective of this study is to translate the Yale Food Addiction Scale (YFAS) into the Malay language and subsequently validate its use in an obese population. METHODS: Between the year 2014 and 2015, a total of 250 obese adults were assessed for food addiction utilizing the Malay version of the YFAS at a primary care clinic...
December 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531364/analysis-of-the-internal-transcribed-spacer-region-of-ascaris-suum-and-ascaris-lumbricoides-derived-from-free-range-tibetan-pigs
#13
Kun Li, Houqiang Luo, Hui Zhang, Khalid Mehmood, Muhammad Shahzad, Lihong Zhang, Jiakui Li
Ascaris suum (A. suum) is the most commonly occurring worldwide internal parasite of pigs; however, little is known about this organism in Tibetan pigs in China. A study was carried to isolate and identify the characteristics of internal transcribed spacer region (ITS) gene of A. suum derived from Tibetan pigs. Adult nematodes were collected from Tibetan pigs in 2015-2016. Total genomic DNA of the extracted parasites was performed and a fragment of the ITS of mitochondrial (mt) gene was amplified. The amplicons were cloned into PGEM®-T Easy Vector (Promega, WI) and the positive clones were sequenced by ABI 3730 × 1 sequencer...
May 21, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28531319/improved-sperm-kinematics-in-semen-samples-collected-after-2-h-versus-4-7-days-of-ejaculation-abstinence
#14
H Alipour, G Van Der Horst, O B Christiansen, F Dardmeh, N Jørgensen, H I Nielsen, C Hnida
STUDY QUESTION: Does a short abstinence period of only 2 h yield spermatozoa with better motility characteristics than samples collected after 4-7 days? SUMMARY ANSWER: Despite lower semen volume, sperm concentration, total sperm counts and total motile counts, higher percentages of motile spermatozoa with higher velocity and progressiveness were detected in samples obtained after 2 h. WHAT IS KNOWN ALREADY: Most studies that have assessed the effect of abstinence periods on sperm motility parameters in men with a sperm concentration below 15 million/ml have detected a higher percentage of motile spermatozoa in samples obtained after short abstinence periods...
May 22, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28531285/paratrigeminal-paraclival-precavernous-or-all-of-the-above-a-circumferential-anatomical-study-of-the-c3-c4-transitional-segment-of-the-internal-carotid-artery
#15
Eleonora Marcati, Norberto Andaluz, Sebastien C Froelich, Lee A Zimmer, James L Leach, Juan Carlos Fernandez-Miranda, Almaz Kurbanov, Jeffrey T Keller
BACKGROUND: Although the term paraclival carotid pervades recent skull base literature, no clear consensus exists regarding boundaries or anatomical segments. OBJECTIVE: To reconcile various internal carotid artery (ICA) nomenclatures for transcranial and endoscopic-endonasal perspectives, we reexamined the transition between lacerum (C3) and cavernous (C4) segments using a C1-C7 segments schema. In this cadaveric study, we obtained a 360°-circumferential view integrating histological, microsurgical, endoscopic, and neuroradiological analyses of this C3-C4 region and identified a distinct transitional segment...
May 21, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28531253/gender-related-prognostic-value-and-genomic-pattern-of-intra-tumor-heterogeneity-ith-in-colorectal-cancer
#16
Jieyun Zhang, Shican Yan, Xiyu Liu, Lu Gan, Zhenhua Wu, Yiwei Gong, Mingzhu Huang, Xiaowei Zhang, Weijian Guo
Intra-tumor heterogeneity (ITH) is crucial in tumorigenesis and resistance to target therapy. Here, we used mutant-allele tumor heterogeneity (MATH) to measure ITH based on next-generation sequencing data and high MATH was proven as an independent risk prognostic factor in male CRC patients in both a training set of 284 colorectal cancer (CRC) patients with from The Cancer Genome Atlas (TCGA) and a validating set of 187 CRC patients from International Cancer Genome Consortium (ICGC). Further, the genomic pattern according to MATH demonstrated that mutation rates of TP53, IRF5 and KRAS were independently associated with MATH, and the latter two were only significant in male patients...
May 20, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28531240/public-knowledge-and-understanding-of-dementia-evidence-from-a-national-survey-in-ireland
#17
Ronan W Glynn, Emer Shelley, Brian A Lawlor
Background: there is growing consensus around the importance of population level approaches which seek to improve public knowledge and awareness of dementia. Aim: to assess knowledge of the relationship between dementia and ageing, and of the risk and protective factors associated with it, among the general public in Ireland. Design: cross-sectional survey. Participants selected using quota sampling based on Census data. Methods: the final sample of 1,217 respondents provided estimates of dementia knowledge in the Irish population...
May 22, 2017: Age and Ageing
https://www.readbyqxmd.com/read/28531171/no-relevant-association-of-kinematic-gait-parameters-with-health-related-quality-of-life-in-parkinson-s-disease
#18
Kristina Bettecken, Felix Bernhard, Jennifer Sartor, Markus A Hobert, Marc Hofmann, Till Gladow, Janet M T van Uem, Inga Liepelt-Scarfone, Walter Maetzler
BACKGROUND: Health-related Quality of Life (HrQoL) is probably the most important outcome parameter for the evaluation and management of chronic diseases. As this parameter is subjective and prone to bias, there is an urgent need to identify objective surrogate markers. Gait velocity has been shown to be associated with HrQoL in numerous chronic diseases, such as Parkinson's disease (PD). With the development and wide availability of simple-to-use wearable sensors and sophisticated gait algorithms, kinematic gait parameters may soon be implemented in clinical routine management...
2017: PloS One
https://www.readbyqxmd.com/read/28531161/development-of-optimized-inhibitor-rnas-allowing-multisite-targeting-of-the-hcv-genome
#19
Cristina Romero-López, Thomas Lahlali, Beatriz Berzal-Herranz, Alfredo Berzal-Herranz
Engineered multivalent drugs are promising candidates for fighting infection by highly variable viruses, such as HCV. The combination into a single molecule of more than one inhibitory domain, each with its own target specificity and even a different mechanism of action, results in drugs with potentially enhanced therapeutic properties. In the present work, the anti-HCV chimeric inhibitor RNA HH363-10, which has a hammerhead catalytic domain and an aptamer RNA domain, was subjected to an in vitro selection strategy to isolate ten different optimised chimeric inhibitor RNAs...
May 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28531137/synthesis-and-excellent-duplex-stability-of-oligonucleotides-containing-2-amino-lna-functionalized-with-galactose-units
#20
Rajesh Kumar, Annika Ries, Jesper Wengel
A convenient method for the preparation of oligonucleotides containing internally-attached galactose and triantennary galactose units has been developed based on click chemistry between 2'-N-alkyne 2'-amino-LNA nucleosides and azido-functionalized galactosyl building blocks. The synthesized oligonucleotides show excellent binding affinity and selectivity towards complementary DNA/RNA strands with an increase in the melting temperature of up to +23.5 °C for triply-modified variants.
May 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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