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https://www.readbyqxmd.com/read/28449202/barn-owls-maximize-head-rotations-by-a-combination-of-yawing-and-rolling-in-functionally-diverse-regions-of-the-neck
#1
Markus Krings, John A Nyakatura, Mark L L M Boumans, Martin S Fischer, Hermann Wagner
Owls are known for their outstanding neck mobility: these birds can rotate their heads more than 270°. The anatomical basis of this extraordinary neck rotation ability is not well understood. We used X-ray fluoroscopy of living owls as well as forced neck rotations in dead specimens and computer tomographic (CT) reconstructions to study how the individual cervical joints contribute to head rotation in barn owls (Tyto furcata pratincola). The X-ray data showed the natural posture of the neck, and the reconstructions of the CT-scans provided the shapes of the individual vertebrae...
April 27, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28449086/a-coordinated-action-of-blood-borne-and-brain-insulin-like-growth-factor-i-in-the-response-to-traumatic-brain-injury
#2
A Santi, L Genis, I Torres Aleman
In response to injury, the brain produces different neuroprotective molecules, such as insulin-like growth factor I (IGF-I). However, IGF-I is also taken up by the brain from the circulation in response to physiological stimuli. Herein, we analyzed in mice the relative contribution of circulating and locally produced IGF-I to increased brain IGF-I levels after insult. Traumatic brain injury (TBI) induced by a controlled impact resulted in increased IGF-I levels in the vicinity of the lesion, but mice with low serum IGF-I showed significantly lower increases...
April 26, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28448961/supported-binary-liposome-vesicle-gold-nanoparticle-for-enhanced-label-free-dna-and-protein-sensing
#3
Divya Karutha Pandian, Venkataraman Dharuman
Supported binary liposome mixture of cationic liposome N-[1-(2,3-Dioleoyloxy)propyl]-N,N,N-trimethylammonium propane (DOTAP) and the zwitterionic liposome 1,2-Dioleoyl-sn-Glycero-3-Phosphoethanolamine (DOPE) were tethered on thiol monolayers in the absence and presence of gold nanoparticle to enhance sensor stability and sensitivity for label free DNA and protein sensing for the first time. Cysteamine hydrochloride (Cyst), 3-Mercaptopropionic acid (MPA), 11-Mercaptoundecanoic acid (MUDA) and 11-amino-1-undecane thiol (AUT) monolayers were used as tethers on gold surfaces...
April 20, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28448955/ionization-spectroscopies-and-theoretical-calculations-of-cis-and-trans-3-fluoro-n-methylaniline-arn-n-1-2-van-der-waals-clusters-structures-and-binding-energies
#4
Lijuan Zhang, Dazhi Li, Min Cheng, Yikui Du, Qihe Zhu
The ab initio and dispersion-corrected density functional theory (DFT) calculations of the van der Waals (vdW) clusters of cis and trans 3-fluoro-N-methylaniline-Arn (3FNMA-Arn) (n=1,2) predict that, for cis and trans 3FNMA-Ar1 clusters, the π-bound geometry with the Ar atom sitting over the ring is the global minimum in both neutral and cationic states, while for cis and trans 3FNMA-Ar2 clusters, the [π|π]-bound sandwich structure with two Ar ligands occupying nearly equivalent π-bound positions above and below the ring plane is the global minimum...
April 18, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28448877/synthesis-structure-and-cytotoxicity-of-a-series-of-dioxidomolybdenum-vi-complexes-featuring-salan-ligands
#5
Satabdi Roy, Monalisa Mohanty, Sagarika Pasayat, Sudarshana Majumder, Kulanthaivel Senthilguru, Indranil Banerjee, Martin Reichelt, Hans Reuter, Ekkehard Sinn, Rupam Dinda
Seven hexacoordinated cis-dioxidomolybdenum(VI) complexes [MoO2L(1-7)] (1-7) derived from various tetradentate diamino bis(phenolato) "salan" ligands, N,N'-dimethyl-N,N'-bis-(2-hydroxy-3-X-5-Y-6-Z-benzyl)-1,2-diaminoethane {(X=Br, Y=Me, Z=H (H2L(1)); X=Me, YCl, Z=H (H2L(2)); X=(i)Pr, Y=Cl, Z=Me (H2L(3))} and N,N'-bis-(2-hydroxy-3-X-5-Y-6-Z-benzyl)-1,2-diaminopropane {(X=Y=(t)Bu, Z=H (H2L(4)); X=Y=Me, Z=H (H2L(5)); X=(i)Pr, YCl, Z=Me (H2L(6)); X=Y=Br, Z=H (H2L(7))} containing O-N donor atoms, have been isolated and structurally characterized...
April 18, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/28448717/insight-on-structure-of-water-and-ice-next-to-graphene-using-surface-sensitive-spectroscopy
#6
Saranshu Singla, Emmanuel Anim-Danso, Ahmad E Islam, Yen Ngo, Steve S Kim, Rajesh R Naik, Ali Dhinojwala
The graphene/water interface has received considerable attention in the past decade due to its relevance in various potential applications including energy storage, sensing, desalination, and catalysis. Most of our knowledge about the interfacial water structure next to graphene stems from simulations, which use experimentally measured water contact angle (WCA) on graphene (or graphite) to estimate the water-graphene interaction strength. However, the existence of a wide spectrum of reported WCAs on supported graphene and graphitic surfaces makes it difficult to interpret the water-graphene interactions...
April 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28448548/altered-striatal-endocannabinoid-signaling-in-a-transgenic-mouse-model-of-spinocerebellar-ataxia-type-3
#7
Carmen Rodríguez-Cueto, Mariluz Hernández-Gálvez, Cecilia J Hillard, Patricia Maciel, Sara Valdeolivas, José A Ramos, María Gómez-Ruiz, Javier Fernández-Ruiz
Spinocerebellar ataxia type-3 (SCA-3) is the most prevalent autosomal dominant inherited ataxia. We recently found that the endocannabinoid system is altered in the post-mortem cerebellum of SCA-3 patients, and similar results were also found in the cerebellar and brainstem nuclei of a SCA-3 transgenic mouse model. Given that the neuropathology of SCA-3 is not restricted to these two brain regions but rather, it is also evident in other structures (e.g., the basal ganglia), we studied the possible changes to endocannabinoid signaling in the striatum of these transgenic mice...
2017: PloS One
https://www.readbyqxmd.com/read/28448512/suppression-of-the-escherichia-coli-dnaa46-mutation-by-changes-in-the-activities-of-the-pyruvate-acetate-node-links-dna-replication-regulation-to-central-carbon-metabolism
#8
Joanna Tymecka-Mulik, Lidia Boss, Monika Maciąg-Dorszyńska, João F Matias Rodrigues, Lidia Gaffke, Anna Wosinski, Grzegorz M Cech, Agnieszka Szalewska-Pałasz, Grzegorz Węgrzyn, Monika Glinkowska
To ensure faithful transmission of genetic material to progeny cells, DNA replication is tightly regulated, mainly at the initiation step. Escherichia coli cells regulate the frequency of initiation according to growth conditions. Results of the classical, as well as the latest studies, suggest that the DNA replication in E. coli starts at a predefined, constant cell volume per chromosome but the mechanisms coordinating DNA replication with cell growth are still not fully understood. Results of recent investigations have revealed a role of metabolic pathway proteins in the control of cell division and a direct link between metabolism and DNA replication has also been suggested both in Bacillus subtilis and E...
2017: PloS One
https://www.readbyqxmd.com/read/28448276/white-light-emission-of-monolithic-ingan-gan-grown-on-morphology-controlled-nanostructured-gan-templates
#9
Keun Man Song, Do Hyun Kim, Jong Min Kim, Chu-Young Cho, Jehyuk Choi, Ka Hee Kim, Jinsub Park, Hogyoung Kim
We demonstrated an InGaN/GaN-based, monolithic, white light-emitting diode (LED) without phosphors by using morphology-controlled active layers formed on multi-facet GaN templates containing polar and semipolar surfaces. The nanostructured surface morphology was controlled by changing the growth time, and distinct multiple photoluminescence peaks were observed at 360, 460, and 560 nm; these features were caused by InGaN/GaN-based multiple quantum wells (MQWs) on the nanostructured facets. The origin of each multi-peak was related to the different indium (In) compositions in the different planes of the quantum wells grown on the nanostructured GaN...
April 27, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28448250/recruiting-community-partners-for-veggie-van-strategies-and-lessons-learned-from-a-mobile-market-intervention-in-north-carolina-2012-2015
#10
Gina L Tripicchio, Jacqueline Grady Smith, Janelle Armstrong-Brown, Jared McGuirt, Lindsey Haynes-Maslow, Sarah Mardovich, Alice S Ammerman, Lucia Leone
BACKGROUND: Food access interventions are promising strategies for improving dietary intake, which is associated with better health. However, studies examining the relationship between food access and intake are limited to observational designs, indicating a need for more rigorous approaches. The Veggie Van (VV) program was a cluster-randomized intervention designed to address the gap between food access and intake. In this article, we aim to describe the approaches involved in recruiting community partners to participate in VV...
April 27, 2017: Preventing Chronic Disease
https://www.readbyqxmd.com/read/28448155/cp-co-iii-catalyzed-annulation-of-carboxylic-acids-with-alkynes
#11
Rajib Mandal, Basker Sundararaju
A new procedure for oxidative coupling of aromatic and acrylic acids with alkynes has been developed using abundant, nontoxic, and air stable Cp*Co(III) catalyst. The coupling involves initial cyclometalation via weak chelation-assisted C-H bond activation followed by alkyne coordination, insertion, and reductive elimination leading to diverse isocoumarins (α-pyranones) in good yields under mild conditions.
April 27, 2017: Organic Letters
https://www.readbyqxmd.com/read/28448142/bottleneck-effect-of-n-n-dimethylformamide-in-inof-1-increasing-co2-capture-in-porous-coordination-polymers
#12
Elí Sánchez-González, Eduardo González-Zamora, Diego Martínez-Otero, Vojtech Jancik, Ilich A Ibarra
The bottleneck effect of confined N,N-dimethylformamide (DMF) molecules was observed in InOF-1 for the first time: CO2 capture was remarkably enhanced in samples of as-synthesized InOF-1, thermally activated in such a way that a small residual amount of DMF molecules remained confined within the pores (DMF@InOF-1). Dynamic CO2 adsorption experiments on DMF@InOF-1 exhibited a CO2 capture of 8.06 wt % [1.5-fold higher than that of a fully activated InOF-1 (5.24%)]. DMF@InOF-1 can reversibly adsorb/desorb 8.09% CO2 with no loss of CO2 capacity after 10 cycles, and the desorption is accomplished by only turning the CO2 flow off...
April 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28448140/essentially-trap-free-cspbbr3-colloidal-nanocrystals-by-post-synthetic-thiocyanate-surface-treatment
#13
Brent A Koscher, Joseph K Swabeck, Noah D Bronstein, A Paul Alivisatos
We demonstrate post-synthetic modification of CsPbBr3 nanocrystals by a thiocyanate salt treatment. This treatment improves the quantum yield of both freshly synthesized (PLQY~90%) and aged nanocrystals (PLQY~70%) to within measurement error (2-3%) of unity, while simultaneously maintaining the shape, size, and colloidal stability. Additionally, the luminescence decay kinetics transform from multi-exponential decays typical of nanocrystalline semiconductors with a distribution of trap sites, to a monoexponential decay, typical of single energy level emitters...
April 27, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28448132/eu-iii-chiral-coordination-polymer-with-a-structural-transformation-system
#14
Naoyuki Koiso, Yuichi Kitagawa, Takayuki Nakanishi, Koji Fushimi, Yasuchika Hasegawa
A luminescent Eu(III) chiral coordination polymer with a structural transformation system, [Eu(hfa)3((R)-bidp)]n (hfa: haxafluoroacetylacetonato, (R)-bidp: (R)-1,1'-binaphthyl-2,2'-bis(diphenylphosphinate), is reported. Single-crystal X-ray analysis revealed a characteristic helical polymer structure of [Eu(hfa)3((R)-bidp)]n with hydrogen-fluorine/π interactions. [Eu(hfa)3((R)-bidp)]n shows high thermostability (decomposition temperature = 320 °C) and strong luminescence properties (the 4f-4f emission quantum yield = 76%) in the solid state due to its tight packing and asymmetric structure...
April 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28447935/host-selected-mutations-converging-on-a-global-regulator-drive-an-adaptive-leap-by-bacteria-to-symbiosis
#15
Molly Sabrina Pankey, Randi L Foxall, Ian M Ster, Lauren A Perry, Brian M Schuster, Rachel A Donner, Matthew Coyle, Vaughn S Cooper, Cheryl A Whistler
Host immune and physical barriers protect against pathogens but also impede the establishment of essential symbiotic partnerships. To reveal mechanisms by which beneficial organisms adapt to circumvent host defenses, we experimentally evolved ecologically distinct bioluminescent Vibrio fischeri through Euprymna scolopes squid light organs. Serial squid passaging of bacteria produced eight distinct mutations in the binK sensor kinase gene that conferred an exceptional selective advantage demonstrated through both empirical and theoretical analysis...
April 27, 2017: ELife
https://www.readbyqxmd.com/read/28447851/-understanding-the-role-of-speech-production-in-reading-evidence-for-a-print-to-speech-neural-network-using-graphical-analysis-correction-to-cummine-et-al-2016
#16
(no author information available yet)
Reports an error in "Understanding the role of speech production in reading: Evidence for a print-to-speech neural network using graphical analysis" by Jacqueline Cummine, Ivor Cribben, Connie Luu, Esther Kim, Reyhaneh Bahktiari, George Georgiou and Carol A. Boliek (Neuropsychology, 2016[May], Vol 30[4], 385-397). In the article, the fifth author's name [Bakhtiari] was misspelled. The online version of this article has been corrected. (The following abstract of the original article appeared in record 2015-49069-001...
May 2017: Neuropsychology
https://www.readbyqxmd.com/read/28447836/the-goldilocks-contract-the-synergistic-benefits-of-combining-structure-and-autonomy-for-persistence-creativity-and-cooperation
#17
Eileen Y Chou, Nir Halevy, Adam D Galinsky, J Keith Murnighan
Contracts are commonly used to regulate a wide range of interactions and relationships. Yet relying on contracts as a mechanism of control often comes at a cost to motivation. Integrating theoretical perspectives from psychology, economics, and organizational theory, we explore this control-motivation dilemma inherent in contracts and present the Contract-Autonomy-Motivation-Performance-Structure (CAMPS) model, which highlights the synergistic benefits of combining structure and autonomy. The model proposes that subtle reductions in the specificity of a contract's language can boost autonomy, which increases intrinsic motivation and improves a range of desirable behaviors...
April 27, 2017: Journal of Personality and Social Psychology
https://www.readbyqxmd.com/read/28447800/stable-dihydrogen-complexes-of-cobalt-i-suggest-an-inverse-trans-influence-of-lewis-acidic-group-13-metalloligands
#18
Matthew Vollmer, Jing Xie, Connie C Lu
A triad of d(10) cobalt dihydrogen complexes were synthesized by utilizing Lewis acidic group 13 metallolig-ands, M[N((o-C6H4)NCH2P(i)Pr2)3], where M = Al, Ga, and In. These complexes have formal Co(-I) oxidation states, representing the only coordination complexes in which dihydrogen is bound to a subvalent transition metal center. Single-crystal X-ray diffraction and NMR studies support the assignment of these complexes as non-classical dihydrogen adducts of Co(-I).
April 27, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28447742/bone-morphogenetic-protein-9-stimulates-callus-formation-in-osteoporotic-rats-during-fracture-healing
#19
Xing Wang, Jun Huang, Fan Huang, Jian-Chun Zong, Xi Tang, Yang Liu, Qiong-Fang Zhang, Yang Wang, Liang Chen, Liang-Jun Yin, Bai-Cheng He, Zhong-Liang Deng
Fracture healing involves the coordinated actions of multiple cytokines. Bone morphogenetic protein 9 (BMP9) is an important factor in bone formation. The present study aimed to investigate the osteogenic potential of bone marrow stem cells (BMSCs) in response to adenoviral (Ad)BMP9, and the early fracture repair properties of AdBMP9 in surgically‑created fractures in osteoporotic rats. Alkaline phosphatase (ALP) activity was assayed and matrix mineralization was examined by Alizarin Red S staining. mRNA and protein expression levels of BMP9, runt‑related transcription factor 2 (RUNX2) and type 1 collagen (COL‑1) were detected in vitro and in vivo...
March 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28447697/magnesium-porphyrins-with-relevance-to-chlorophylls
#20
Karishma Devi Borah, Jagannath Bhuyan
A review on the chemistry of magnesium porphyrins, which have significant interest owing to the relevance to chlorophyll molecules, is presented with emphasis on bicarbonate adducts of magnesium porphyrin and chlorophyll. The chemistry of 26 unique magnesium porphyrins is described as review articles on synthetic magnesium porphyrins are limited. Interest is given to the electron transfer reactions of magnesium porphyrins in artificial photosynthetic systems. The magnesium porphyrins are described considering coordination chemistry, structural aspects, electronic and electrochemical properties...
April 27, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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