keyword
MENU ▼
Read by QxMD icon Read
search

Three-dimensional

keyword
https://www.readbyqxmd.com/read/29150982/visualization-within-the-ventricles-of-the-brain-a-micro-focus-x-ray-study
#1
Edwin John de Jager, André Francois du Plessis, Jakobus Willem Hoffman, Anna Catherina Oettlé, Marius Casparus Bosman
Conceptualization of the ventricular system of the brain by macroscopic studies is complicated by the lack of physical structure of these interconnected cavities. Dissection procedures designed to display the structures in the walls of the ventricles are destructive and not conducive for the appreciation of the ventricular system in its entirety. The application of Micro-focus X-ray tomography affords the possibility to appreciate hidden structures in a non-destructive manner. The aim of this study was to explore the possibility of using micro-focus X-ray tomography in the three-dimensional (3D) visualization of the ventricular system as well as the various neuroanatomical structures within its walls for educational purposes...
November 18, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29150802/ion-imprinted-electrospun-nanofibers-of-chitosan-1-butyl-3-methylimidazolium-tetrafluoroborate-for-the-dynamic-expulsion-of-thorium-iv-ions-from-mimicked-effluents
#2
Prakash Macchindra Gore, Latika Khurana, Suhail Siddique, Anjana Panicker, Balasubramanian Kandasubramanian
The present study explores the innocuous, biocompatible, and extremely competent molecularly imprinted chitosan/RTIL electrospun nanofibers having average diameter of 30 nm for the expulsion of thorium (IV) ions from the mimicked effluent waste. The extended Flory-Huggins theory and three-dimensional molecular modeling have been effectively premeditated via Materials Studio software for enumerating the inter-miscibility and compatibility (Chi parameter (χ) = 1.019, mixing energy (Emix) = 0.603 kcal/mol) of the chitosan/RTIL (1-butyl-3-methylimidazolium tetrafluoroborate)...
November 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29150791/16-channel-flexible-system-to-measure-electrophysiological-properties-of-bioengineered-hearts
#3
Betsy H Salazar, Kristopher A Hoffman, Anilkumar K Reddy, Sridhar Madala, Ravi K Birla
As tissue engineering continues to mature, it is necessary to develop new technologies that bring insight into current paradigms and guide improvements for future experiments. To this end, we have developed a system to characterize our bioartificial heart model and compare them to functional native structures. In the present study, the hearts of adult Sprague-Dawley were decellularized resulting in a natural three-dimensional cardiac scaffold. Neonatal rat primary cardiac cells were then cultured within a complex 3D fibrin gel, forming a 3-dimensional cardiac construct, which was sutured to the acellular scaffold and suspended in media for 24-48 h...
November 17, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/29150765/finite-element-design-optimization-of-a-hyaluronic-acid-based-hydrogel-drug-delivery-device-for-improved-retention
#4
Jourdan Colter, Barbara Wirostko, Brittany Coats
Drug-loaded hydrogel devices are emerging as an effective means of localized and sustained drug delivery for the treatment of corneal conditions and injuries. One such device uses a novel, thiolated crosslinked carboxymethylated, hyaluronic acid-based hydrogel (CMHA-S) film to deliver drug to the ocular surface upon placement into the inferior fornix of the eye. While proven to be very safe and effective, the CMHA-S film tends to dislodge in the highly-lubricated ocular environment, thereby reducing drug delivery efficiency and drug efficacy...
November 17, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29150749/study-on-the-interaction-of-paeoniflorin-with-human-serum-albumin-hsa-by-spectroscopic-and-molecular-docking-techniques
#5
Liang Xu, Yan-Xi Hu, Yan-Cheng Li, Yu-Feng Liu, Li Zhang, Hai-Xin Ai, Hong-Sheng Liu
The interaction of paeoniflorin with human serum albumin (HSA) was investigated using fluorescence, UV-vis absorption, circular dichroism (CD) spectra and molecular docking techniques under simulative physiological conditions. The results clarified that the fluorescence quenching of HSA by paeoniflorin was a static quenching process and energy transfer as a result of a newly formed complex (1:1). Paeoniflorin spontaneously bound to HSA in site I (subdomain IIA), which was primarily driven by hydrophobic forces and hydrogen bonds (ΔH° = - 9...
November 17, 2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/29150745/alignment-in-the-transverse-plane-but-not-sagittal-or-coronal-plane-affects-the-risk-of-recurrent-patella-dislocation
#6
Shigeru Takagi, Takashi Sato, Satoshi Watanabe, Osamu Tanifuji, Tomoharu Mochizuki, Go Omori, Naoto Endo
PURPOSE: Abnormalities of lower extremity alignment (LEA) in recurrent patella dislocation (RPD) have been studied mostly by two-dimensional (2D) procedures leaving three-dimensional (3D) factors unknown. This study aimed to three-dimensionally examine risk factors for RPD in lower extremity alignment under the weight-bearing conditions. METHODS: The alignment of 21 limbs in 15 RPD subjects was compared to the alignment of 24 limbs of 12 healthy young control subjects by an our previously reported 2D-3D image-matching technique...
November 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29150683/null-functions-in-three-dimensional-imaging-of-alpha-and-beta-particles
#7
Yijun Ding, Luca Caucci, Harrison H Barrett
Null functions of an imaging system are functions in the object space that give exactly zero data. Hence, they represent the intrinsic limitations of the imaging system. Null functions exist in all digital imaging systems, because these systems map continuous objects to discrete data. However, the emergence of detectors that measure continuous data, e.g. particle-processing (PP) detectors, has the potential to eliminate null functions. PP detectors process signals produced by each particle and estimate particle attributes, which include two position coordinates and three components of momentum, as continuous variables...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150596/forming-a-three-dimensional-porous-organic-network-via-solid-state-explosion-of-organic-single-crystals
#8
Seo-Yoon Bae, Dongwook Kim, Dongbin Shin, Javeed Mahmood, In-Yup Jeon, Sun-Min Jung, Sun-Hee Shin, Seok-Jin Kim, Noejung Park, Myoung Soo Lah, Jong-Beom Baek
Solid-state reaction of organic molecules holds a considerable advantage over liquid-phase processes in the manufacturing industry. However, the research progress in exploring this benefit is largely staggering, which leaves few liquid-phase systems to work with. Here, we show a synthetic protocol for the formation of a three-dimensional porous organic network via solid-state explosion of organic single crystals. The explosive reaction is realized by the Bergman reaction (cycloaromatization) of three enediyne groups on 2,3,6,7,14,15-hexaethynyl-9,10-dihydro-9,10-[1,2]benzenoanthracene...
November 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29150496/alginate-lyases-diversity-of-three-dimensional-structures-and-catalytic-mechanisms
#9
Fei Xu, Peng Wang, Yu-Zhong Zhang, Xiu-Lan Chen
Alginate is a linear polysaccharide mainly produced by brown algae in marine environments. Alginate consists of a linear block copolymer made up of two monomeric units, β-d-mannuronate (M) and its C5 epimer α-l-guluronate (G). Alginate lyases are polysaccharide lyases (PL) that degrade alginate via a β-elimination reaction. These enzymes play an important role in marine carbon recycling, and also have widespread industrial applications. So far, more than 1774 alginate lyase sequences have been identified and are distributed into 7 PL families...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29150134/stress-generation-in-mandibular-anterior-teeth-restored-with-different-types-of-post-and-core-at-various-levels-of-ferrule
#10
Anatolii Savychuk, Marianthi Manda, Christos Galanis, Christofer Provatidis, Petros Koidis
STATEMENT OF PROBLEM: Pertinent evidence regarding the mechanical integrity of mandibular anterior teeth restored with a post-and-core is limited. PURPOSE: The purpose of this finite element analysis study was to compare the impact of the post type (glass fiber post-and-resin core or cast post-and-core) along with the ferrule effect on the stress fields generated in endodontically treated mandibular lateral incisors and canines. MATERIAL AND METHODS: Three-dimensional models of the segmented mandible were developed...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29149895/novel-insights-into-chromosomal-conformations-in-cancer
#11
REVIEW
Ruobing Jia, Peiwei Chai, He Zhang, Xianqun Fan
Exploring gene function is critical for understanding the complexity of life. DNA sequences and the three-dimensional organization of chromatin (chromosomal interactions) are considered enigmatic factors underlying gene function, and interactions between two distant fragments can regulate transactivation activity via mediator proteins. Thus, a series of chromosome conformation capture techniques have been developed, including chromosome conformation capture (3C), circular chromosome conformation capture (4C), chromosome conformation capture carbon copy (5C), and high-resolution chromosome conformation capture (Hi-C)...
November 17, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/29149813/structural-analysis-of-cd59-of-chinese-tree-shrew-a-new-reference-molecule-for-human-immune-system-specific-cd59-drug-discovery
#12
Subhamay Panda, Leena Kumari, Santamay Panda
BACKGROUND: Chinese tree shrews (Tupaia belangeri chinensis) bear several characteristics that are considered to be very crucial for utilizing in animal experimental models in biomedical research. Subsequent to the identification of key aspects and signaling pathways in nervous and immune systems, it is revealed that tree shrews acquires shared common as well as unique characteristics, and hence offers a genetic basis for employing this animal as a prospective model for biomedical research...
November 17, 2017: Current Drug Discovery Technologies
https://www.readbyqxmd.com/read/29149568/individual-atomic-imaging-of-multiple-dopant-sites-in-as-doped-si-using-spectro-photoelectron-holography
#13
Kazuo Tsutsui, Tomohiro Matsushita, Kotaro Natori, Takayuki Muro, Yoshitada Morikawa, Takuya Hoshii, Kuniyuki Kakushima, Hitoshi Wakabayashi, Kouichi Hayashi, Fumihiko Matsui, Toyohiko Kinoshita
The atomic scale characterization of dopant atoms in semiconductor devices to establish correlations with the electrical activation of these atoms is the essential to the advancement of contemporary semiconductor process technology. Spectro-photoelectron holography combined with first-principles simulations can determine the local three-dimensional atomic structures of dopant elements, which in turn affect their electronic states. In the work reported herein, this technique was used to examine arsenic (As) atoms doped into a silicon (Si) crystal...
November 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/29149567/preparation-of-lithium-titanate-reduced-graphene-oxide-composites-with-3d-fishnet-like-conductive-structure-via-a-gas-foaming-method-for-high-rate-lithium-ion-batteries
#14
Tao Meng, Fenyun Yi, Honghong Cheng, Junnan Hao, Dong Shu, Shixu Zhao, Chun He, Xiaona Song, Fan Zhang
Using ammonium chloride (NH4Cl) as the pore-forming agent, three-dimensional (3D) "fishnet-like" lithium titanate/reduced graphene oxide (LTO/G) composites with hierarchical porous structure are prepared via a gas-foaming method. SEM and TEM images show that in the composite prepared with the NH4Cl concentration of 1 mg mL-1 (1-LTO/G), LTO particles with sizes of 50~100 nm disperse homogeneously on the 3D "fishnet-like" graphene sheets. The nitrogen-sorption analyses reveal the existence of micro/mesopores, which is attributed to the introduction of NH4Cl into the gap between the graphene sheets that further decomposes into gases and produces hierarchical pores during the thermal treatment process...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29149542/spectrally-encoded-coherence-tomography-and-reflectometry-sectr-simultaneous-en-face-and-cross-sectional-imaging-at-2-gigapixels-per-second
#15
Mohamed T El-Haddad, Ivan Bozic, Yuankai K Tao
Non-invasive biological imaging is crucial for understanding in vivo structure and function. Optical coherence tomography (OCT) and reflectance confocal microscopy are two of the most widely used optical modalities for exogenous contrast-free high-resolution three-dimensional imaging in non-fluorescent scattering tissues. However, sample motion remains a critical barrier to raster-scanned acquisition and reconstruction of wide-field anatomically accurate volumetric datasets. We introduce spectrally encoded coherence tomography and reflectometry (SECTR), a high-speed multimodality system for simultaneous OCT and spectrally-encoded reflectance (SER) imaging...
November 17, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/29149090/computational-methods-for-modeling-aptamers-and-designing-riboswitches
#16
REVIEW
Sha Gong, Yanli Wang, Zhen Wang, Wenbing Zhang
Riboswitches, which are located within certain noncoding RNA region perform functions as genetic "switches", regulating when and where genes are expressed in response to certain ligands. Understanding the numerous functions of riboswitches requires computation models to predict structures and structural changes of the aptamer domains. Although aptamers often form a complex structure, computational approaches, such as RNAComposer and Rosetta, have already been applied to model the tertiary (three-dimensional (3D)) structure for several aptamers...
November 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29148971/convergence-of-topological-domain-boundaries-insulators-and-polytene-interbands-revealed-by-high-resolution-mapping-of-chromatin-contacts-in-the-early-drosophila-melanogaster-embryo
#17
Michael R Stadler, Jenna E Haines, Michael Eisen
High-throughput assays of three-dimensional interactions of chromosomes have shed considerable light on the structure of animal chromatin. Despite this progress, the precise physical nature of observed structures and the forces that govern their establishment remain poorly understood. Here we present high resolution Hi-C data from early Drosophila embryos. We demonstrate that boundaries between topological domains of various sizes map to DNA elements that resemble classical insulator elements: short genomic regions sensitive to DNase digestion that are strongly bound by known insulator proteins and are frequently located between divergent promoters...
November 17, 2017: ELife
https://www.readbyqxmd.com/read/29148597/three-dimensional-analysis-of-bone-remodeling-following-ridge-augmentation-of-compromised-extraction-sockets-in-periodontitis-patients-a-randomized-controlled-study
#18
Mario Aimetti, Valeria Manavella, Lisa Corano, Elena Ercoli, Cristina Bignardi, Federica Romano
OBJECTIVES: The aim of this study was to analyze linear and volumetric hard tissue changes in severely resorbed alveolar sockets after ridge augmentation procedure and to compare them with spontaneous healing using three-dimensional cone beam computed tomography (CBCT). MATERIAL AND METHODS: Thirty patients (mean age 53.2 ± 6.3 years) requiring tooth extraction for advanced periodontitis were randomly allocated to test and control groups. The test sites were grafted using a collagenated bovine-derived bone (DBBM-C) covered with a collagen membrane, while control sites had spontaneous healing...
November 17, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29148559/exploring-the-geometric-magnetic-and-electronic-properties-of-hofmann-mofs-for-drug-delivery
#19
Bikash Mandal, Jin Suk Chung, Sung Gu Kang
The geometric, magnetic, and electronic properties and the drug capturing abilities of Hofmann-type metal organic frameworks (MOFs) were examined using theoretical calculations. The detailed theoretical calculations predicted that the Hofmann sheet can have two different conformations, planar and twisted. The Ni-Co sheet was the most stable among the systems studied, whereas the Ni-Fe sheet was the least stable. All of the sheets were magnetic spin semiconductors, having Dirac-like and dispersionless bands, which give rise to a major spatial separation between the charge carriers upon excitation...
November 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29147941/artificial-bio-nanomachines-based-on-protein-needles-derived-from-bacteriophage-t4
#20
REVIEW
Hiroshi Inaba, Takafumi Ueno
Bacteriophage T4 is a natural bio-nanomachine which achieves efficient infection of host cells via cooperative motion of specific three-dimensional protein architectures. The relationships between the protein structures and their dynamic functions have recently been clarified. In this review we summarize the design principles for fabrication of nanomachines using the component proteins of bacteriophage T4 based on these recent advances. We focus on the protein needle known as gp5, which is located at the center of the baseplate at the end of the contractile tail of bacteriophage T4...
November 16, 2017: Biophysical Reviews
keyword
keyword
34200
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"