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https://www.readbyqxmd.com/read/28822953/xylanase-from-acinetobacter-pittii-mask-25-and-developed-magnetic-cross-linked-xylanase-aggregate-produce-predominantly-xylopentose-and-xylohexose-from-agro-biomass
#1
Anjali Purohit, Shushil Kumar Rai, Manisha Chownk, Rajender Singh Sangwan, Sudesh Kumar Yadav
Most of the chemical and biochemical processes used for the de-polymerization of structural polymers of lignocellulosic biomass are environment unfriendly and costly. Here an efficient process based on xylanase, produced by Acinetobacter pittii MASK25 (MTCC 25132), hydrolysis of only physically treated rice straw and corn cob has been developed for the production of xylooligosaccharides. Bacterial strain isolated from soil was found to produce maximum xylanase at 30°C and pH 7. While the optimum temperature and pH of xylanase were characterized as 40°C and 5...
August 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28822938/do-natural-biofilm-impact-nzvi-mobility-and-interactions-with-porous-media-a-column-study
#2
Marc Crampon, Jennifer Hellal, Christophe Mouvet, Guillaume Wille, Caroline Michel, Anke Wiener, Juergen Braun, Patrick Ollivier
Nanoparticles (NP) used as remediation agents for groundwater treatment may interact with biofilms naturally present, altering NP mobility and/or reactivity and thereby NP effectiveness. The influence of the presence of a multi species biofilm on the mobility of two types of zero-valent iron NP (nZVI; NANOFER 25S and optimized NANOFER STAR, NanoIron s.r.o. (Czech Republic)) was tested in laboratory experiments with columns mimicking aquifer conditions. Biofilms were grown in columns filled with sand in nitrate reducing conditions using groundwater from an industrial site as inoculum...
August 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28822865/formation-and-morphogenesis-of-a-cuttlebone-s-aragonite-biomineral-structures-for-the-common-cuttlefish-sepia-officinalis-on-the-nanoscale-revisited
#3
Vida Čadež, Srečo D Škapin, Adrijana Leonardi, Igor Križaj, Saša Kazazić, Branka Salopek-Sondi, Ivan Sondi
This study describes and examines the structural and morphological properties of the hierarchically organized, aragonite cuttlebone forms for the common cuttlefish (Sepia officinalis, L.), including its main structural parts, the dorsal shield, and the chambers. Specifically, it complements the mechanism for the self-organized formation of aragonite, identifies the presence, and determines the role of soluble organic matrix (SOM) proteins in the morphogenesis of the cuttlebone's biomineral structures on the nanoscale...
August 10, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28822859/a-facile-method-to-prepare-green-nano-phosphors-with-a-large-stokes-shift-and-solid-state-enhanced-photophysical-properties-based-on-surface-modified-gold-nanoclusters
#4
C H Cheng, H Y Huang, M J Talite, W C Chou, J M Yeh, C T Yuan
Colloidal nano-materials, such as quantum dots (QDs) have been applied to light-conversion nano-phosphors due to their unique tunable emission. However, most of the QDs involve toxic elements and are synthesized in a hazardous solvent. In addition, conventional QD nano-phosphors with a small Stokes shift suffered from reabsorption losses and aggregation-induced quenching in the solid state. Here, we demonstrate a facile, matrix-free method to prepare eco-friendly nano-phosphors with a large Stokes shift based on aqueous thiolate-stabilized gold nanoclusters (GSH-AuNCs) with simple surface modifications...
August 8, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28822790/galectin-3-as-a-novel-regulator-of-osteoblast-osteoclast-interaction-and-bone-homeostasis
#5
Dominic Simon, Anja Derer, Fabian Andes, Patrick Lezuo, Aline Bozec, Georg Schett, Martin Herrmann, Ulrike Harre
Bone tissue undergoes permanent and lifelong remodeling with a concerted action of bone-building osteoblasts and bone-resorbing osteoclasts. A precise cooperation between those two cell types is critical in the complex process of bone renewal. Galectin-3 is a member of the β-galactoside-binding lectin family playing multiple roles in cell growth, differentiation and aggregation. As it has been described to be expressed in bone, galectin-3 might influence bone homeostasis by regulating the function and/or interplay of osteoblasts and osteoclasts...
August 16, 2017: Bone
https://www.readbyqxmd.com/read/28822787/global-regional-and-national-deaths-prevalence-disability-adjusted-life-years-and-years-lived-with-disability-for-chronic-obstructive-pulmonary-disease-and-asthma-1990-2015-a-systematic-analysis-for-the-global-burden-of-disease-study-2015
#6
(no author information available yet)
BACKGROUND: Chronic obstructive pulmonary disease (COPD) and asthma are common diseases with a heterogeneous distribution worldwide. Here, we present methods and disease and risk estimates for COPD and asthma from the Global Burden of Diseases, Injuries, and Risk Factors (GBD) 2015 study. The GBD study provides annual updates on estimates of deaths, prevalence, and disability-adjusted life years (DALYs), a summary measure of fatal and non-fatal disease outcomes, for over 300 diseases and injuries, for 188 countries from 1990 to the most recent year...
August 16, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28822725/berberine-modulates-amyloid-%C3%AE-peptide-generation-by-activating-amp-activated-protein-kinase
#7
Haijing Zhang, Chunhui Zhao, Guoqiong Cao, Limin Guo, Shuai Zhang, Yuexia Liang, Chunxia Qin, Ping Su, Hang Li, Wensheng Zhang
Alzheimer's disease (AD) is an age-related neurodegenerative disorder characterized by memory deficits and cognitive decline. Excessive amyloid-β (Aβ) peptide aggregates and forms soluble oligomers and insoluble cerebral amyloid plaques, which is widely thought to be the underlying pathogenic mechanism of AD. Therefore, effective regulation of Aβ metabolism is an important aspect of preventing and improving AD. Berberine, which is the main active component of the traditional medicinal herb Coptidis rhizoma, has a positive effect on reducing Aβ levels...
August 16, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28822566/human-pulp-responses-to-partial-pulpotomy-treatment-with-theracal-as-compared-with-biodentine-and-proroot-mta-a-clinical-trial
#8
Hengameh Bakhtiar, Mohammad Hossein Nekoofar, Pouyan Aminishakib, Fatemeh Abedi, Fereshteh Naghi Moosavi, Ehsan Esnaashari, Arash Azizi, Samar Esmailian, Mohammad Reza Ellini, Vahid Mesgarzadeh, Mehdi Sezavar, Imad About
INTRODUCTION: Questions exist regarding the efficacy of resin-containing materials such as TheraCal directly applied on the pulp. This study sought to investigate the clinical efficacy of TheraCal as compared with Biodentine and ProRoot mineral trioxide aggregate (MTA) for partial pulpotomy. METHODS: In this clinical trial, partial pulpotomy was performed for 27 sound human maxillary and mandibular third molars scheduled for extraction. The teeth were randomly divided into 3 groups (n = 9) and underwent partial pulpotomy with TheraCal, Biodentine, and ProRoot MTA...
August 16, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28822564/regenerative-endodontic-treatment-or-mineral-trioxide-aggregate-apical-plug-in-teeth-with-necrotic-pulps-and-open-apices-a-systematic-review-and-meta-analysis
#9
REVIEW
Mahmoud Torabinejad, Ali Nosrat, Prashant Verma, Oyoyo Udochukwu
INTRODUCTION: A mineral trioxide aggregate (MTA) apical plug (MAP) and regenerative endodontic treatment (RET) have shown acceptable clinical outcomes. However, comparative studies are scarce. The aims of this study were to examine the level of evidence for both treatments, conduct a systematic review of the literature on MAP and RET, and run a meta-analysis on the survival and success rates of teeth treated with these procedures. METHODS: Electronic searches were performed in MEDLINE, Web of Science, and the Cochrane Library...
August 16, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28822551/disruption-of-staphylococcus-aureus-biofilms-using-rhamnolipid-biosurfactants
#10
S S E Silva, J W P Carvalho, C P Aires, M Nitschke
Staphylococcus aureus is an important pathogen that has shown ability to establish biofilm communities that can represent a source of contamination and resistance in food processing. Rhamnolipids (RL) have attracted attention as candidates to replace synthetic surfactants, exhibiting high surface activity combined with its microbial origin, biodegradability, and low toxicity. In this work, an RL biosurfactant was evaluated regarding its ability to disrupt or remove S. aureus biofilms established on polystyrene plates using nutrient broth and skim milk as the growth media...
August 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28822292/nanoparticles-assemblies-on-demand-controlled-aggregation-of-ag-0-mediated-by-modified-peptoid-sequences
#11
Hagar Tigger-Zaborov, Galia Maayan
Assemblies of metal nanoparticles (NPs) have been broadly used for the construction of materials with distinct spectroscopic properties towards sensing applications. On the other hand, well-dispersed NPs are exploit for applications in catalysis and medicine. Biopolymers or biomimetic oligomers can serve both as efficient stabilizers of NPs and as useful aggregation mediators that can lead to assemblies with unique properties. Controlling aggregation processes, however, is still challenging and often relies on trial and error rather than on defined thumb rules...
August 12, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28822256/addressing-harmful-algal-blooms-habs-impacts-with-ferrate-vi-simultaneous-removal-of-algal-cells-and-toxins-for-drinking-water-treatment
#12
Yang Deng, Meiyin Wu, Huiqin Zhang, Lei Zheng, Yaritza Acosta, Tsung-Ta D Hsu
Although ferrate(VI) has long been recognized as a multi-purpose treatment agent, previous investigations regarding ferrate(VI) for addressing harmful algal blooms (HABs) impacts in drinking water treatment only focused on a single HAB pollutant (e.g. algal cells or algal toxins). Moreover, the performance of ferrate(VI)-driven coagulation was poorly investigated in comparison with ferrate(VI) oxidation, though it has been widely acknowledged as a major ferrate(VI) treatment mechanism. We herein reported ferrate(VI) as an emerging agent for simultaneous and effective removal of algal cells and toxins in a simulated HAB-impacted water...
August 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28822178/-study-on-associated-plants-and-spatial-distribution-pattern-of-dipsacus-asperoides-populations
#13
Da-Xia Chen, Si-Rong Yi, Xue Zhang, Yuan Pan, Guang-Lin Cui, Long-Yun Li, Ze Zhang
In order to understand the associated species and the population distribution pattern, the investigation of 32 sample plotsfrom the main natural distribution area in Dipsacus asperoides community was carried by quadrat method .The results showed that there were 156 species, which belong to 131 genera and 60 families. There were more species in the two dominant families, Asteraceae and Rosaceae. There were many types of associated, but most appeared at a low frequency. The vegetation type were mostly herbaceous and shrub species, which accounted for 77...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28822159/-effect-of-sodium-houttuyfonate-in-combination-with-erythromycin-on-luxs-agr-rna%C3%A2-of-staphylococus-epidermidis
#14
Gan-Fei Xu, Jing-Jing Wang, Da-Qiang Wu, Yan Guan
Quorum sensing of bacteria and its specific gene expression regulation have a very important role in bacterial biofilm formation. LuxS and agr are the key regulatory genes in quorum sensing of Staphylococcus epidermidis, and RNA Ⅲ is the effector molecule of agr system. In order to evaluate the effects of sodium houttuyfonate in combination with erythromycin on the transcription level of S. epidermidis, serial dilution method was used to determine the MIC of sodium houttuyfonate, erythromycin and vancomycin on S...
June 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28822080/soluble-epoxide-hydrolase-inhibition-attenuates-mptp-induced-neurotoxicity-in-the-nigrostriatal-dopaminergic-system-involvement-of-%C3%AE-synuclein-aggregation-and-er-stress
#15
Hui-Ju Huang, Yi-Ting Wang, Hui-Ching Lin, Yi-Hsuan Lee, Anya Maan-Yuh Lin
Soluble epoxide hydrolase (sEH) is widely expressed in the mammalian brain and possesses dual enzymatic activities, including C-terminal epoxide hydrolase (C-EH) which degrades epoxyeicosatrienoic acid (EET), a beneficial arachidonic acid metabolite. In the present study, the neuroprotective effect of sEH inhibition on 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced neurodegeneration of nigrostriatal dopaminergic system was investigated using genetic and pharmacological approaches. MPTP (15 mg/kg) was intraperitoneally injected in sEH knockout (KO) mice and C57BL/6J mice as wild-type (WT) mice...
August 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28822041/two-species-migration-and-clustering-in-two-dimensional-domains
#16
Lawrence Kurowski, Andrew L Krause, Hanako Mizuguchi, Peter Grindrod, Robert A Van Gorder
We extend two-species models of individual aggregation or clustering to two-dimensional spatial domains, allowing for more realistic movement of the populations compared with one spatial dimension. We assume that the domain is bounded and that there is no flux into or out of the domain. The motion of the species is along fitness gradients which allow the species to seek out a resource. In the case of competition, species which exploit the resource alone will disperse while avoiding one another. In the case where one of the species is a predator or generalist predator which exploits the other species, that species will tend to move toward the prey species, while the prey will tend to avoid the predator...
August 18, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28821965/increased-endocytosis-of-magnetic-nanoparticles-into-cancerous-urothelial-cells-versus-normal-urothelial-cells
#17
Jasna Lojk, Vladimir Boštjan Bregar, Klemen Strojan, Samo Hudoklin, Peter Veranič, Mojca Pavlin, Mateja Erdani Kreft
The blood-urine barrier is the tightest and most impermeable barrier in the body and as such represents a problem for intravesical drug delivery applications. Differentiation-dependent low endocytotic rate of urothelial cells has already been noted; however, the differences in endocytosis of normal and cancer urothelial cells have not been exploited yet. Here we analysed the endocytosis of rhodamine B isothiocyanate-labelled polyacrylic acid-coated cobalt ferrite nanoparticles (NPs) in biomimetic urothelial in vitro models, i...
August 18, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28821937/natural-hazard-susceptibility-assessment-for-road-planning-using-spatial-multi-criteria-analysis
#18
Caroline S J Karlsson, Zahra Kalantari, Ulla Mörtberg, Bo Olofsson, Steve W Lyon
Inadequate infrastructural networks can be detrimental to society if transport between locations becomes hindered or delayed, especially due to natural hazards which are difficult to control. Thus determining natural hazard susceptible areas and incorporating them in the initial planning process, may reduce infrastructural damages in the long run. The objective of this study was to evaluate the usefulness of expert judgments for assessing natural hazard susceptibility through a spatial multi-criteria analysis approach using hydrological, geological, and land use factors...
August 18, 2017: Environmental Management
https://www.readbyqxmd.com/read/28821934/whole-exome-sequencing-to-identify-the-cause-of-congenital-sensorineural-hearing-loss-in-carriers-of-a-heterozygous-gjb2-mutation
#19
Thomas Parzefall, Alexandra Frohne, Martin Koenighofer, Andreas Kirchnawy, Berthold Streubel, Christian Schoefer, Klemens Frei, Trevor Lucas
Bi-allelic variations in the gap junction protein beta-2 (GJB2) gene cause up to 50% of cases of newborn hearing loss. Heterozygous pathogenic GJB2 variations are also fivefold overrepresented in idiopathic patient groups compared to the normal-hearing population. Whether hearing loss in this group is due to unidentified additional variations within GJB2 or variations in other deafness genes is unknown in most cases. Whole-exome sequencing offers an effective approach in the search for causative variations in patients with Mendelian diseases...
August 18, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28821888/risk-factors-for-epistaxis-in-patients-followed-in-general-practices-in-germany
#20
D U Seidel, L Jacob, K Kostev, A M Sesterhenn
<p>BACKGROUND: The goal of the present study was to analyze the risk factors for epistaxis in patients followed in general practices in Germany.</p> <p>METHODS: The current study sample included patients aged 18 years or older who received a first epistaxis diagnosis between January 2012 and December 2016 (index date). Epistaxis patients and controls without epistaxis were matched (1:1) on the basis of age, gender, insurance status and physician. </p> <p>RESULTS: A total of 16,801 patients with epistaxis and 16,801 control subjects were included in this study...
August 19, 2017: Rhinology
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