keyword
MENU ▼
Read by QxMD icon Read
search

Pattern formation

keyword
https://www.readbyqxmd.com/read/28430996/asymmetric-hybridization-in-cattails-typha-spp-and-its-implications-for-the-evolutionary-maintenance-of-native-typha-latifolia
#1
Sara J Pieper, Allison A Nicholls, Joanna R Freeland, Marcel E Dorken
Cattails (Typha spp.) have become an increasingly dominant component of wetlands in eastern North America and this dominance is largely attributable to the high frequency of Typha × glauca, the hybrid of native T. latifolia and putatively introduced T. angustifolia. Hybridization in this group is asymmetric, with T. angustifolia nearly always the maternal parent of F1 hybrids. However, the magnitude of hybrid infertility and whether mating asymmetries extend to the formation of advanced-generation hybrids have not been examined...
April 19, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28430952/a-strategy-for-helicobacter-immunohistochemistry-utilization-in-pediatric-practice-%C3%A2-insights-from-morphologic-and-cost-benefit-analyses
#2
Miriam R Conces, Christina A Arnold, Peter B Baker, Christopher M Carter, Bonita Fung, Vinay Prasad, Michael A Arnold
Objectives: Recent studies in adults have examined the utility of immunohistochemistry (IHC) in detecting Helicobacter in gastric biopsy specimens and reached differing conclusions. Dedicated cost-benefit analysis of Helicobacter IHC in pediatric gastric biopsy specimens has not been performed. Methods: From 1,955 pediatric gastric biopsies in a 1-year period, we identified 63 Helicobacter -positive and 120 Helicobacter -negative biopsy specimens. All cases were scored according to the Updated Sydney System for the severity of inflammation...
November 1, 2016: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28429730/new-bicyclic-cembranoids-from-the-south-china-sea-soft-coral-sarcophyton-trocheliophorum
#3
Lin-Fu Liang, Wen-Ting Chen, Xu-Wen Li, He-Yao Wang, Yue-Wei Guo
Nine new bicyclic cembranoids, sarcophytrols M-U(1-9), were isolated from the South China Sea soft coral Sarcophyton trocheliophorum as minor components, along with one known related cembranoid 10. Their structures were elucidated by detailed spectroscopic analysis and chemical conversion. The chemical structures of these metabolites are characterized by the different patterns of the additional cyclization within the 14-member skeleton, which leading to the formation of furan, pyran, oxepane, and peroxyl rings, respectively...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429729/weak-connections-form-an-infinite-number-of-patterns-in-the-brain
#4
Hai-Peng Ren, Chao Bai, Murilo S Baptista, Celso Grebogi
Recently, much attention has been paid to interpreting the mechanisms for memory formation in terms of brain connectivity and dynamics. Within the plethora of collective states a complex network can exhibit, we show that the phenomenon of Collective Almost Synchronisation (CAS), which describes a state with an infinite number of patterns emerging in complex networks for weak coupling strengths, deserves special attention. We show that a simulated neuron network with neurons weakly connected does produce CAS patterns, and additionally produces an output that optimally model experimental electroencephalograph (EEG) signals...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28429689/relationship-between-fragmented-qrs-complexes-in-leads-v4-v6-and-left-ventricular-apical-thrombus-formation-in-patients-presenting-with-first-acute-anterior-myocardial-infarction
#5
Erkan Baysal, Cengiz Burak, Barış Yaylak, Bernas Altıntaş, Önder Öztürk, Hacı Çiftçi, Rojhat Altındağ, Serdar Söner
OBJECTIVE: The present study was an investigation of the relationship between fragmented QRS (fQRS) and left ventricular apical thrombus (LVAT) in patients presenting with first acute anterior myocardial infarction (MI). METHODS: Consecutive 148 patients (mean age: 60.1±10.1 years; male: 75.6%) with first acute anterior MI who underwent primary percutaneous coronary intervention (PCI) were included. Study population was divided into 2 groups based on presence of LVAT...
April 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28429543/on-the-formation-of-smaller-p-block-endohedral-fullerenes-bonding-analysis-in-the-e-c20-e%C3%A2-%C3%A2-si-ge-sn-pb-series-from-relativistic-dft-calculations
#6
Alvaro Muñoz-Castro, R Bruce King
Experimentally characterized endohedral metallofullerenes are of current interest in expanding the range of viable fullerenic structures and their applications. Smaller metallofullerenes, such as M@C28 , show that several d- and f-block elements can be efficiently confined in relatively small carbon cages. This article explores the potential capabilities of the smallest fullerene cage, that is, C20 , to encapsulate p-block elements from group 14, that is, E = Si, Ge, Sn, and Pb. Our interest relates to the bonding features and optical properties related to E@C20 ...
April 20, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28428993/from-nano-to-microcrystals-effects-of-different-synthetic-pathways-on-the-defect-architecture-in-heavily-gd-doped-ceria
#7
M Coduri, M Scavini, M Pani, M M Carnasciali, H Klein, C Artini
The evolution of the defect structure and microstructure of heavily Gd-doped ceria (Ce1-μREμO2-y, 0.313 ≤ μ ≤ 0.438) for different synthetic pathways is investigated here to explore the way defects interact with each other in a composition range known to effectively hamper the application of the material as an electrolyte. Synchrotron radiation powder diffraction is exploited by combining conventional Rietveld analysis with the Pair Distribution Function to get a multiscale picture of defect structures, and it is combined with Raman spectroscopy to assess local scale interactions...
April 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28428873/a-maize-landrace-that-emits-defense-volatiles-in-response-to%C3%A2-herbivore-eggs-possesses-a-strongly-inducible-terpene-synthase-gene
#8
Amanuel Tamiru, Toby J A Bruce, Annett Richter, Christine M Woodcock, Charles A O Midega, Jörg Degenhardt, Segenet Kelemu, John A Pickett, Zeyaur R Khan
Maize (Zea mays) emits volatile terpenes in response to insect feeding and egg deposition to defend itself against harmful pests. However, maize cultivars differ strongly in their ability to produce the defense signal. To further understand the agroecological role and underlying genetic mechanisms for variation in terpene emission among maize cultivars, we studied the production of an important signaling component (E)-caryophyllene in a South American maize landrace Braz1006 possessing stemborer Chilo partellus egg inducible defense trait, in comparison with the European maize line Delprim and North American inbred line B73...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28427346/karyotypic-evolution-of-the-medicago-complex-sativa-caerulea-falcata-inferred-from-comparative-cytogenetic-analysis
#9
Feng Yu, Haiqing Wang, Yanyan Zhao, Ruijuan Liu, Quanwen Dou, Jiangli Dong, Tao Wang
BACKGROUND: Polyploidy plays an important role in the adaptation and speciation of plants. The alteration of karyotype is a significant event during polyploidy formation. The Medicago sativa complex includes both diploid (2n = 2× = 16) and tetraploid (2n = 2× = 32) subspecies. The tetraploid M. ssp. sativa was regarded as having a simple autopolyploid origin from diploid ssp. caerulea, whereas the autopolyploid origin of tetraploid ssp. falcata from diploid form ssp. falcata is still in doubt...
April 21, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28427311/feasibility-and-acceptability-of-a-clinic-based-mediterranean-style-diet-intervention-to-reduce-cardiovascular-risk-for-hispanic-americans-with-type-2-diabetes
#10
Laura Cubillos, Yanire Estrada Del Campo, Khalil Harbi, Thomas Keyserling, Carmen Samuel-Hodge, Daniel S Reuland
Purpose The purpose of the study was to modify a previously tested Spanish language version of a Mediterranean (Med)-style dietary intervention so that the dietary recommendations align with the cultural and social needs of Hispanic Americans (HAs) with type 2 diabetes (T2D) and evaluate the modified intervention's feasibility and acceptability. Methods In phase I (formative), semi-structured interviews and focus groups were used to refine the intervention content and format for delivery to HAs with T2D receiving care at a large primary care practice...
April 1, 2017: Diabetes Educator
https://www.readbyqxmd.com/read/28426669/a-dynamic-genetic-hormonal-regulatory-network-model-explains-multiple-cellular-behaviors-of-the-root-apical-meristem-of-arabidopsis-thalian
#11
Mónica L García-Gómez, Eugenio Azpeitia, Elena R Álvarez-Buylla
The study of the concerted action of hormones and transcription factors is fundamental to understand cell differentiation and pattern formation during organ development. The root apical meristem of Arabidopsis thaliana is a useful model to address this. It has a stem cell niche near its tip conformed of a quiescent organizer and stem or initial cells around it, then a proliferation domain followed by a transition domain, where cells diminish division rate before transiting to the elongation zone; here, cells grow anisotropically prior to their final differentiation towards the plant base...
April 20, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28425919/cell-behavior-of-human-mesenchymal-stromal-cells-in-response-to-silica-collagen-based-xerogels-and-calcium-deficient-culture-conditions
#12
Alena Wagner, Kristina Glenske, Anja Henß, Benjamin Kruppke, Sina Rößler, Thomas Hanke, Andreas Moritz, Marcus Rohnke, Monika Kressin, Stefan Arnhold, Reinhard Schnettler, Sabine Wenisch
Presently, we aim to elucidate osteogenic effects of two silica-based xerogels with different degrees of bioactivity on human bone-derived mesenchymal stromal cells. By means of scanning electron microscopy and quantitative PCR enhanced osteogenic effects and the formation of an extracellular matrix could be ascribed to the sample with lower bioactivity. Given the high levels of bioactivity, the cells revealed remarkable sensitivity to extremely low calcium levels of the media. Therefore, additional experiments were performed to elucidate cell behavior under calcium deficient conditions...
April 20, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28425275/associations-between-obesity-and-the-radiographic-phenotype-in-knee-osteoarthritis
#13
Mehmet Derya Demirağ, Seçil Özkan, Şeminur Haznedaroğlu, Evin Aras Kilinç, Fatma Nur Baran Aksakal, Sefer Aycan, Berna Göker
BACKGROUND/AIM: Investigation of the association between obesity and the distinction of radiographic patterns in knee osteoarthritis. MATERIALS AND METHODS: Seven hundred and thirty-four women underwent weight-bearing antero-posterior knee radiography. Osteophytes and joint space narrowing (JSN) were graded according to the OARSI atlas. Each subject was assigned to one of the following groups with respect to the maximum score: osteophyte-dominant, indeterminate, JSN-dominant, and radiographically normal...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28424712/a-functional-approach-towards-understanding-the-role-of-the-mitochondrial-respiratory-chain-in-an-endomycorrhizal-symbiosis
#14
Louis Mercy, Eva Lucic-Mercy, Amaia Nogales, Areg Poghosyan, Carolin Schneider, Birgit Arnholdt-Schmitt
Arbuscular mycorrhizal fungi (AMF) are crucial components of fertile soils, able to provide several ecosystem services for crop production. Current economic, social and legislative contexts should drive the so-called "second green revolution" by better exploiting these beneficial microorganisms. Many challenges still need to be overcome to better understand the mycorrhizal symbiosis, among which (i) the biotrophic nature of AMF, constraining their production, while (ii) phosphate acts as a limiting factor for the optimal mycorrhizal inoculum application and effectiveness...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28424595/gray-matter-atrophy-is-primarily-related-to-demyelination-of-lesions-in-multiple-sclerosis-a-diffusion-tensor-imaging-mri-study
#15
Eszter Tóth, Nikoletta Szabó, Gergõ Csete, András Király, Péter Faragó, Tamás Spisák, Krisztina Bencsik, László Vécsei, Zsigmond T Kincses
Objective: Cortical pathology, periventricular demyelination, and lesion formation in multiple sclerosis (MS) are related (Hypothesis 1). Factors in the cerebrospinal fluid close to these compartments could possibly drive the parallel processes. Alternatively, the cortical atrophy could be caused by remote axonal transection (Hypothesis 2). Since MRI can differentiate between demyelination and axon loss, we used this imaging modality to investigate the correlation between the pattern of diffusion parameter changes in the periventricular- and deep white matter and the gray matter atrophy...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28424460/generation-of-heritable-germline-mutations-in-the-jewel-wasp-nasonia-vitripennis-using-crispr-cas9
#16
Ming Li, Lauren Yun Cook Au, Deema Douglah, Abigail Chong, Bradley J White, Patrick M Ferree, Omar S Akbari
The revolutionary RNA-guided endonuclease CRISPR/Cas9 system has proven to be a powerful tool for gene editing in a plethora of organisms. Here, utilizing this system we developed an efficient protocol for the generation of heritable germline mutations in the parasitoid jewel wasp, Nasonia vitripennis, a rising insect model organism for the study of evolution, development of axis pattern formation, venom production, haplo-diploid sex determination, and host-symbiont interactions. To establish CRISPR-directed gene editing in N...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424399/-recent-advancements-in-understanding-hippocampal-functions
#17
Sakura Okada, Yuki Aoki, Takuya Sasaki, Yuji Ikegaya
The hippocampal formation located in the medial temporal lobe of the brain has been studied extensively for several decades, both in in vitro slice preparations and in vivo living animals. Recent advancements in large-scale recording techniques, such as multisite silicon probes and tetrodes, enable us to examine the detailed characteristics of temporal spiking patterns of tens or hundreds of neurons in the hippocampal circuit. Here, we introduce how such tools contribute to our understanding of the hippocampal network dynamics and review several hippocampal functions for information processing in the brain, including pattern separation and completion, spatial representation, and encoding of positive and negative valence...
April 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/28424096/metabolic-and-proteomic-analyses-of-product-selectivity-and-redox-regulation-in-clostridium-pasteurianum-grown-on-glycerol-under-varied-iron-availability
#18
Christin Groeger, Wei Wang, Wael Sabra, Tyll Utesch, An-Ping Zeng
BACKGROUND: Clostridium pasteurianum as an emerging new microbial cell factory can produce both n-butanol (BuOH) and 1,3-propanediol (1,3-PDO), and the pattern of product formation changes significantly with the composition of the culture medium. Among others iron content in the medium was shown to strongly affect the products selectivity. However, the mechanism behind this metabolic regulation is still unclear. For a better understanding of such metabolic regulation and for process optimization, we carried out fermentation experiments under either iron excess or iron limitation conditions, and performed metabolic, stoichiometric and proteomic analyses...
April 19, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28422320/mir-34b-modulates-skeletal-muscle-cell-proliferation-and-differentiation
#19
Zhixiong Tang, Huiling Qiu, Lan Luo, Nian Liu, Jiasheng Zhong, Kang Kang, Deming Gou
Myogenesis involves myoblast proliferation and differentiation to myocytes, followed by fusion and hypertrophy to form myotubes during muscle development. Increasing evidence showed that microRNAs (miRNAs) play important roles in the regulation of myogenesis. We have previously revealed that miR-34b is steadily increased during this process. This miRNA regulates differentiation in various cell types, though its function in myogenesis remains to be elucidated. In this study, we show that miR-34b represses muscle cell proliferation and promotes myotube formation...
April 19, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28420319/bcor-ccnb3-undifferentiated-sarcoma-does-immunohistochemistry-help-in-the-identification
#20
Kathrin Ludwig, Rita Alaggio, Angelica Zin, Marica Peron, Vincenza Guzzardo, Stefania Benini, Alberto Righi, Marco Gambarotti
Recent methodology has enabled the identification of some new genetic subgroups within the melting pot of lesions presently classified by the 2013 WHO classification as "undifferentiated/unclassified sarcomas". One of these subgroups is characterized by a paracentric inversion of the X chromosome with consequent formation of a BCOR-CCNB3 fusion. Clinical and pathological features of these tumors overlap with the Ewing sarcoma family as well as other soft tissue sarcomas, thus making them difficult to diagnose...
January 1, 2017: Pediatric and Developmental Pathology
keyword
keyword
19538
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"