18,253 results match your criteria arrangement structure

High power pump and signal combiner for backward pumping structure with two different fused fiber bundle designs by means of pretapered pump fibers.

Opt Express 2021 Apr;29(9):13344-13358

We report on two high power backward (6 + 1) × 1 pump and signal combiners with different optical designs based on end-pumping technique, each achieving more than 95% coupling ratio of signal light, 98% coupling ratio of pump light, and a total pump power of 2.95kW. Both designs solve the problem of non-uniform arrangement in asymmetric fiber bundles by the pretreatment of the pump fibers and signal fiber. Read More

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Peeling back the layers: Investigating the effects of polyelectrolyte layering on surface structure and stability of oil-in-water nanoemulsions.

J Colloid Interface Sci 2021 Apr 24;599:706-716. Epub 2021 Apr 24.

Department of Chemistry and Biochemistry, University of Oregon, Eugene, OR 97403, United States. Electronic address:

Hypothesis: Layer-by-layer deposition of polyelectrolytes is a useful technique for modifying surface functionalities. For drug delivery systems, alternating layers of biopolymers coat nanoemulsions, which house and protect the cargo until the time and destination of delivery. Here, we investigate molecular factors contributing to the stability and interfacial properties of nanoemulsions prepared by a co-adsorption of polymers poly(styrene sulfonate) and polyethylenimine (PEI), and surfactant dodecyltrimethylammonium bromide. Read More

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Microstructural changes of the wall of uterine horn in the domestic cat (Felis silvestris catus) during postnatal development.

Theriogenology 2021 May 3;170:23-35. Epub 2021 May 3.

Department of Histology and Embryology, Faculty of Veterinary Medicine and Animal Science, Poznan University of Life Sciences, Wojska Polskiego 71C, PL-60-625, Poznań, Poland.

The study describes the details of histological changes occurring during the postnatal development of the wall of the uterine horn in the European shorthair domestic cat. Light microscope observations and morphometric analysis were carried out to investigate the rate of development of the wall of the uterine horns in order to estimate the maturing time. Uterine horns of newborn and 1week-old cats are fetal-like and showing smooth, nonfolded endometrium lined with pseudostratified epithelium, deprived of uterine glands, and poorly developed two-layered myometrium. Read More

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Comparative mitogenomes of three species in Moenkhausia: Rare irregular gene rearrangement within Characidae.

Int J Biol Macromol 2021 May 10;183:1079-1086. Epub 2021 May 10.

College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, People's Republic of China. Electronic address:

Generally, a teleostean group possesses only one type or a set of similar mitochondrial gene arrangements. However, a new type of gene arrangement has been identified in the mitochondrial genomes (mitogenomes) of Moenkhausia. Here, three newly sequenced complete mitogenomes of tetras (Characidae: Moenkhausia) are presented (M. Read More

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Heterocapsa busanensis sp. nov. (Peridiniales, Dinophyceae): A new marine thecate dinoflagellate from Korean coastal waters.

Eur J Protistol 2021 Apr 23;79:125797. Epub 2021 Apr 23.

Division of Earth Environmental System Science, Pukyong National University, Busan 48513, Republic of Korea; Department of Oceanography, Pukyong National University, Busan 48513, Republic of Korea. Electronic address:

During daily monitoring in Yongho Bay off Busan, Korea in 2019, an isolate of the dinoflagellate genus Heterocapsa was established in clonal culture. Light and electron microscopic examination revealed that the isolate was ellipsoid in shape, exhibiting a thecal plate arrangement (Po, cp, X, 5', 3a, 7″, 6c, 5s, 5‴, 2'''') consistent with most other Heterocapsa species. A large, elongated nucleus was positioned on the left side of the cell, a single reticulate chloroplast was located peripherally, and a single, starch-sheathed, spherical pyrenoid was present in the episome or near the cingulum. Read More

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Syntheses, structure and properties of a new series of organic-inorganic Hg-based halides: adjusting halogens resulted in huge performance mutations.

Dalton Trans 2021 May 12. Epub 2021 May 12.

Institute of Materials Science, TU Darmstadt, 64287 Darmstadt, Germany.

Three new organic-inorganic hybrid perovskite (OIHP) halides, [N(CH3)4]HgCl0.63Br2.37 (I), [N(CH3)4]HgBrI2 (II) and [N(CH3)4]HgCl0. Read More

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MyD88 TIR domain higher-order assembly interactions revealed by microcrystal electron diffraction and serial femtosecond crystallography.

Nat Commun 2021 May 10;12(1):2578. Epub 2021 May 10.

Institute for Glycomics, Griffith University, Southport, Queensland, Australia.

MyD88 and MAL are Toll-like receptor (TLR) adaptors that signal to induce pro-inflammatory cytokine production. We previously observed that the TIR domain of MAL (MAL) forms filaments in vitro and induces formation of crystalline higher-order assemblies of the MyD88 TIR domain (MyD88). These crystals are too small for conventional X-ray crystallography, but are ideally suited to structure determination by microcrystal electron diffraction (MicroED) and serial femtosecond crystallography (SFX). Read More

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Polydopamine Films with 2D-like Layered Structure and High Mechanical Resilience.

ACS Appl Mater Interfaces 2021 May 10. Epub 2021 May 10.

Faculty of Chemistry, Adam Mickiewicz University, ul. Uniwersytet Poznańskiego 8, 61-614 Poznań, Poland.

Highly oriented, layered, and mechanically resilient films of polydopamine (PDA) have been synthesized from the air/water interface. The films show a unique layered structure, as shown by scanning and transmission electron studies (SEM/TEM) and X-ray diffraction analysis (XRD), which resemble that of 2D layered materials. The films exhibit a composition typical of PDA-based materials, as evidenced by X-ray photoelectron spectroscopy (XPS); moreover, the samples present the distinctive resonance modes of PDA-based nanomaterials in Raman and infrared spectroscopy (FTIR) experiments. Read More

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Characterization of magnesium doped sol-gel biomaterial for bone tissue regeneration: The effect of Mg ion in protein adsorption.

Mater Sci Eng C Mater Biol Appl 2021 Jun 17;125:112114. Epub 2021 Apr 17.

Departament of Science and Technology of Polymers, Universidad del País Vasco, P. M. de Lardizábal, 3, 20018 San Sebastián, Spain.

Magnesium is the fourth most abundant element in the human body with a wide battery of functions in the maintenance of normal cell homeostasis. In the bone, this element incorporates in the hydroxyapatite structure and it takes part in mineral metabolism and regulates osteoclast functions. In this study, sol-gel materials with increasing concentrations of MgCl (0. Read More

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Permeability of anodic alumina membranes grown on low-index aluminium surfaces.

Nanotechnology 2021 May 7. Epub 2021 May 7.

Lomonosov Moscow State University, Moscow, RUSSIAN FEDERATION.

Porous anodic aluminium oxide (AAO) membranes have various practical applications in separation and purification technologies. Numerous approaches have been utilized to tailor the transport properties of porous AAO films, but all of them assumed the isotropic nature of anodized aluminium. Here, the impact of aluminium crystallography on the permeability of AAO membranes is disclosed. Read More

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Ultraeven Mo-Doped CoP Nanocrystals as Bifunctional Electrocatalyst for Efficient Overall Water Splitting.

Langmuir 2021 May 7. Epub 2021 May 7.

Laboratory for Low Dimensional Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.

To develop precious-metal-free bifunctional catalysts for overall water splitting, ultraeven Mo-doped CoP composites (Mo-CoP) have been fabricated by an in situ phosphorization protocol using CoMo-layered double hydroxide (CoMo-LDH) as the precursor. The ordered arrangement of cations in the CoMo-LDH could be easily phosphored and generate the ultraevenly dispersed Mo element within the CoP structure, resulting in the excellent bifunctional catalyst for overall water splitting. The hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalytic activities of the composites present an increase first and then a decreasing tendency with increased Mo doping content. Read More

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Expanding the Topological Landscape by a G-Column Flip of a Parallel G-Quadruplex.

Chemistry 2021 May 6. Epub 2021 May 6.

Universität Greifswald, Institut für Biochemie, Felix-Hausdorff-Str. 4, 17487, Greifswald, GERMANY.

Canonical G-quadruplexes can adopt a variety of different topologies depending on the arrangement of propeller, lateral, or diagonal loops connecting the four G-columns. A novel intramolecular G-quadruplex structure is derived through inversion of the last G-tract of a three-layered parallel fold, associated with the transition of a single propeller into a lateral loop. The resulting (3+1) hybrid fold features three syn·anti·anti·anti G-tetrads with a 3'-terminal all- syn G-column. Read More

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Syntheses and structures of two benzoyl amides: 2-chloro-4-eth-oxy-3,5-dimeth-oxy--(3-oxo-cyclo-hex-1-en-1-yl)benzamide and 2-chloro--(5,5-dimethyl-3-oxo-cyclo-hex-1-en-1-yl)-4-eth-oxy-3,5-di-meth-oxy-benzamide.

Acta Crystallogr E Crystallogr Commun 2021 Mar 26;77(Pt 3):314-318. Epub 2021 Feb 26.

Department of Natural Sciences, Bowie State University, 14000 Jericho Park Road, Bowie, MD 20715-9465, USA.

The first title benzoyl amide, CHClNO (), crystallizes in the monoclinic space group 2/ with = 4 and the second, CHClNO (), also crystallizes in 2/ with = 8 (' = 2), thus there are two independent mol-ecules in the asymmetric unit. In , the phenyl ring makes a dihedral angle of 50.8 (3)° with the amide moiety with the C=O group on the same side of the mol-ecule as the C-Cl group. Read More

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Crystal structure and Hirshfeld surface analysis of poly[[bis-[μ-,'-(1,3,5-oxadiazinane-3,5-di-yl)bis(carbamoyl-methano-ato)]nickel(II)tetra-potassium] 4.8-hydrate].

Acta Crystallogr E Crystallogr Commun 2021 Mar 26;77(Pt 3):298-304. Epub 2021 Feb 26.

The Faculty of Physics, Tajik National University, Rudaki Avenue 17, 734025 Dushanbe, Tajikistan.

The title compound, {[KNi(CHNO)]·4.8HO} , was obtained as a result of a template reaction between oxalohydrazide-hydroxamic acid, formaldehyde and nickel(II) nitrate followed by partial hydrolysis of the formed inter-mediate. The two independent [Ni(CHNO)] complex anions exhibit pseudo- symmetry and consist of an almost planar metal-containing fragment and a 1,3,5-oxadiazinane ring with a chair conformation disposed nearly perpendicularly with respect to the former. Read More

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Crystal structure of -(1,4,8,11-tetra-aza-cyclo-tetra-decane-κ)bis-(thio-cyanato-κ)chromium(III) bromide from synchrotron X-ray diffraction data.

Acta Crystallogr E Crystallogr Commun 2021 Mar 2;77(Pt 3):222-225. Epub 2021 Feb 2.

Department of Chemistry, Andong National University, Andong 36729, Republic of Korea.

The crystal structure of the title complex, -[Cr(NCS)(cyclam)]Br (cyclam = 1,4,8,11-tetra-aza-cyclo-tetra-decane, CHN), has been determined from synchrotron X-ray data. The asymmetric unit contains one [Cr(NCS)(cyclam)] cation and one bromide anion. The Cr ion of the complex cation is coordinated by the four N atoms of the cyclam ligand and by two N-coordinating NCS groups in a arrangement, displaying a distorted octa-hedral coordination sphere. Read More

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Synthesis, crystal structure and Hirshfeld surface analysis of [bis-(di-phenyl-phosphan-yl)methane-κ]chloridobis-[2-(pyridin-2-yl)phenyl-κ,]iridium(III).

Acta Crystallogr E Crystallogr Commun 2021 Mar 2;77(Pt 3):217-221. Epub 2021 Feb 2.

Division of Physical Science and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, 90112, Thailand.

The title Ir complex, [Ir(CHN)Cl(CHP)], was synthesized from the substitution reaction between the (ppy)Ir(μ-Cl)Ir(ppy) (ppy = deprotonated 2-phenyl-pyridine, CHN) dimer and 1,1-bis-(di-phenyl-phosphan-yl)methane (dppm, CHP) under an argon gas atmosphere for 20 h. The Ir atom is coordinated by two C,-bidentate ppy anions, a unidentate dppm ligand and a chloride anion in a distorted octa-hedral IrCNPCl arrangement. The N donor atoms of the ppy ligands are mutually while the C atoms are . Read More

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Moving toward generalizable NZ-1 labeling for 3D structure determination with optimized epitope-tag insertion.

Acta Crystallogr D Struct Biol 2021 May 19;77(Pt 5):645-662. Epub 2021 Apr 19.

Graduate School of Medical Life Science, Yokohama City University, Japan.

Antibody labeling has been conducted extensively for structure determination using both X-ray crystallography and electron microscopy (EM). However, establishing target-specific antibodies is a prerequisite for applying antibody-assisted structural analysis. To expand the applicability of this strategy, an alternative method has been developed to prepare an antibody complex by inserting an exogenous epitope into the target. Read More

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Detection and Structural Investigation of Elusive Palladium Hydride Intermediates Formed from Simple Metal Salts.

Inorg Chem 2021 May 5. Epub 2021 May 5.

Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow 119991, Russia.

The Mizoroki-Heck reaction is one of the most known and best studied catalytic transformations and has provided an outstanding driving force for the development of catalysis and synthetic applications. Three out of four classical Mizoroki-Heck catalytic cycle intermediates contain Pd-C bonds and are well known and studied in detail. However, a simple palladium hydride (which is formed after the product-releasing β-H-elimination step) is a kind of elusive intermediate in the Mizoroki-Heck reaction. Read More

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HUNTER-Chip: Bioinspired Hierarchically Aptamer Structure-Based Circulating Fetal Cell Isolation for Non-Invasive Prenatal Testing.

Anal Chem 2021 May 5. Epub 2021 May 5.

Institute of Molecular Medicine, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.

Isolation and genetic analysis of circulating fetal cells from billions of maternal cells in peripheral blood are the cornerstone of fetal cell-based non-invasive prenatal testing. Inspired by the hierarchically multivalent architecture for enhanced capture of nature, an aptamer-based Hierarchically mUltivalent aNTibody mimic intERface (HUNTER) was designed with a tremendous avidity effect for highly efficient capture and non-destructive release of fetal cells. It was engineered by grafting Y-shaped DNA nanostructures to a linear polymer chain, creating a flexible polymer chain with bivalent aptamer side chains. Read More

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Cation-based approach to morphological diversity of diphenylalanine dipeptide structures.

Hakan Erdoğan

Soft Matter 2021 May 4. Epub 2021 May 4.

University of Health Sciences Turkey, Gülhane Faculty of Pharmacy, Department of Pharmaceutical Chemistry, 06018 Ankara, Turkey.

Different approaches are taken in order to examine the spontaneous arrangement processes of dipeptide structures. One of these approaches is to examine the effects of common cations on dipeptide structures' self-assembly processes. In this study, the effects of Al3+, Cu2+, Pb2+, Hg2+, Mg2+, Zn2+, Cd2+, Fe2+ and Ni2+ cations on the self-assembly processes of diphenylalanine (FF) dipeptide molecules were investigated. Read More

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IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes.

Nanomaterials (Basel) 2021 Apr 29;11(5). Epub 2021 Apr 29.

Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, Ilkovicova 3, 81219 Bratislava, Slovakia.

In this paper, we present a two-dimensional surface plasmon resonance structure for refractive index sensing of liquid analytes. The polymer structure was designed with a period of 500 nm and prepared in a novel IP-Dip polymer by direct laser writing lithography based on a mechanism of two-photon absorption. The sample with a set of prepared IP-Dip structures was coated by 40 nm thin gold layer. Read More

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Cobalt Regulates Activation of Camk2α in Neurons by Influencing Fructose 1,6-bisphosphatase 2 Quaternary Structure and Subcellular Localization.

Int J Mol Sci 2021 Apr 30;22(9). Epub 2021 Apr 30.

Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335 Wrocław, Poland.

Fructose 1,6-bisphosphatase 2 (Fbp2) is a gluconeogenic enzyme and multifunctional protein modulating mitochondrial function and synaptic plasticity via protein-protein interactions. The ability of Fbp2 to bind to its cellular partners depends on a quaternary arrangement of the protein. NAD and AMP stabilize an inactive T-state of Fbp2 and thus, affect these interactions. Read More

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SEM and TEM for identification of capsular fibrosis and cellular behavior around breast implants - a descriptive analysis.

BMC Mol Cell Biol 2021 May 3;22(1):25. Epub 2021 May 3.

University Center for Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Regensburg and Caritas Hospital St. Josef, 93053, Regensburg, Germany.

Background: Capsular fibrosis (CF) is the most common long-term complication in implant-based breast augmentation. It is well accepted that the foreign body response (FBR) instigates the development of fibrotic disease. Our study aims to compare murine and human samples of CF and describe the cellular and extracellular matrix (ECM) composition using scanning and transmission electron microscopy (SEM and TEM). Read More

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A meta-analysis on the anatomical variability of the brachial plexus: Part I - roots, trunks, divisions and cords.

Ann Anat 2021 Apr 30:151751. Epub 2021 Apr 30.

Department of Anatomy, Second Faculty of Medicine, Charles University, Plzenska 130/221, 150 06 Prague 5, Czech Republic; Clinic of Trauma Surgery, Masaryk Hospital, Socialni pece 3316/12A, 400 11 Usti nad Labem, Czech Republic.

Introduction: The brachial plexus is a complex anatomical structure that gives rise to all the nerves of the upper limb. Its variability is frequently observed and represents a challenge for interventions in the lower neck and axilla. The aim of this study was to present a comprehensive and evidence-based review with meta-analytic techniques on the variability of roots, trunks, divisions and cords of the brachial plexus. Read More

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Comparative ultrastructure of trichomes on various organs of Rosa roxburghii.

Microsc Res Tech 2021 May 2. Epub 2021 May 2.

Agricultural College, Guizhou University, Guiyang, China.

Chestnut rose, R. roxburghii Tratt. (Rosaceae) (RR) is an important crop in China due to its nutritional and medicinal values. Read More

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Effects of the structure and gel properties of myofibrillar protein on chicken breast quality treated with ultrasound-assisted potassium alginate.

Food Chem 2021 Apr 20;358:129873. Epub 2021 Apr 20.

Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China; School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Rd, 212013 Zhenjiang, Jiangsu, PR China; Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, 210014, China.

This paper aimed to evaluate the effects of the structure and gel properties of myofibrillar protein (MP) on 300-days-old chicken breast quality treated with ultrasound (300 W) and low addition (4 mg/mL) of potassium alginate (UPA). The results showed that UPA group exhibited lower liquid loss and optimized texture correlated with the formed water barrier and damaged myofibrils. UPA reduced the MP size and increased its solubility, and the decreased myosin thermostability and dissociated actomyosin reduced heating time for improved texture. Read More

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Adaptation of the MAUQ and usability evaluation of a mobile phone-based system to promote eye donation.

Int J Med Inform 2021 Apr 15;151:104462. Epub 2021 Apr 15.

Centre for Research in Nursing and Health St George Hospital, Australia. Electronic address:

Introduction: Mobile Applications (apps) are commonly used in the health care settings to improve the quality of care, however prior to the release of the app it is vital to evaluate its usability. Therefore, the aim of this study is to adapt the mobile Health App Usability Questionnaire (MAUQ) and measure the usability of the Eye donor Aust App using the modified instrument (m-MAUQ).

Methods: The study was undertaken using a convenience sample of 94 patients and their carers attending three eye clinics and one outpatient department in a large hospital in Sydney Australia. Read More

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Three-dimensional structures of avian beta-microseminoproteins: insight from the chicken egg-specific beta-microseminoprotein 3 paralog.

FEBS Open Bio 2021 May 1. Epub 2021 May 1.

INRAE, Université de Tours, BOA, Nouzilly, France.

Beta-microseminoproteins (MSMBs) are small disulfide-rich proteins that are conserved among vertebrates. These proteins exhibit diverse biological activities and were mainly reported to play a role in male fertility, immunity, and embryogenesis. In this work, we focused on the chicken MSMB3 protein that was previously depicted as an egg antibacterial protein. Read More

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Exploring the evolutionary characteristics between cultivated tea and its wild relatives using complete chloroplast genomes.

BMC Ecol Evol 2021 Apr 30;21(1):71. Epub 2021 Apr 30.

Hunan Research Center of Engineering Technology for Utilization of Environmental and Resources Plant, Central South University of Forestry and Technology, Changsha, 410004, Hunan, People's Republic of China.

Background: Cultivated tea is one of the most important economic and ecological trees distributed worldwide. Cultivated tea suffer from long-term targeted selection of traits and overexploitation of habitats by human beings, which may have changed its genetic structure. The chloroplast is an organelle with a conserved cyclic genomic structure, and it can help us better understand the evolutionary relationship of Camellia plants. Read More

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Isolation and characterization of cyclotides from the leaves of L. using peptidomic and bioinformatic approach.

3 Biotech 2021 May 11;11(5):211. Epub 2021 Apr 11.

School of Biotechnology, University of Jammu, Jammu and Kashmir, India.

Cyclotides are true gene products characterized by the presence of six conserved cysteine residues and knotted arrangement of three disulfide bonds. These macrocyclic peptides show exceptional resistance to thermal, chemical and enzymatic degradation which is defined due to their three-dimensional folding. The current study describes an efficient strategy involving reduction, enzymatic digestion and mass spectroscopy sequencing for the identification of the precursor sequences and the cyclotide domains present in the leaf tissue of . Read More

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