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https://www.readbyqxmd.com/read/28922745/big-brother-uncouples-cell-proliferation-from-elongation-in-the-arabidopsis-primary-root
#1
Pietro Cattaneo, Christian S Hardtke
Plant organ size is sensitive to environmental conditions, but is also limited by hardwired genetic constraints. In Arabidopsis, a few organ size regulators have been identified. Among them, the BIG BROTHER (BB) gene has a prominent role in the determination of flower organ and leaf size. BB loss-of-function mutations result in a prolonged proliferation phase during leaf(-like) organ formation, and consequently larger leaves, petals and sepals. Whether BB has a similar role in root growth is unknown. Here we describe a novel bb allele which carries a P235L point mutation in the BB RING finger domain...
September 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28902813/-surgical-decision-making-during-treatment-of-a-patient-with-multifocal-atherosclerosis-based-on-intraoperative-epiaortic-scanning
#2
A V Marchenko, P A Mialiuk, A S Vronskiĭ
The article deals with a clinical case report regarding surgical management of a patient presenting with multifocal atherosclerosis. Taking into consideration critical stenoses of the anterior interventricular artery (80%) and circumflex artery (80%), as well as subocclusion of the left internal carotid artery and stenosis of the right internal carotid artery (60%), there were high risks for intraoperative cerebral circulation impairment. It was decided to perform a two-stage operation on the coronary and carotid beds...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/28898600/rapid-associative-learning-and-stable-long-term-memory-in-the-squid-euprymna-scolopes
#3
Emily A Zepeda, Robert J Veline, Robyn J Crook
Learning and memory in cephalopod molluscs have received intensive study because of cephalopods' complex behavioral repertoire and relatively accessible nervous systems. While most of this research has been conducted using octopus and cuttlefish species, there has been relatively little work on squid. Euprymna scolopes Berry, 1913, a sepiolid squid, is a promising model for further exploration of cephalopod cognition. These small squid have been studied in detail for their symbiotic relationship with bioluminescent bacteria, and their short generation time and successful captive breeding through multiple generations make them appealing models for neurobiological research...
June 2017: Biological Bulletin
https://www.readbyqxmd.com/read/28889973/origin-of-the-reflectin-gene-and-hierarchical-assembly-of-its-protein
#4
Zhe Guan, Tiantian Cai, Zhongmin Liu, Yunfeng Dou, Xuesong Hu, Peng Zhang, Xin Sun, Hongwei Li, Yao Kuang, Qiran Zhai, Hao Ruan, Xuanxuan Li, Zeyang Li, Qihui Zhu, Jingeng Mai, Qining Wang, Luhua Lai, Jianguo Ji, Haiguang Liu, Bin Xia, Taijiao Jiang, Shu-Jin Luo, Hong-Wei Wang, Can Xie
Cephalopods, the group of animals including octopus, squid, and cuttlefish, have remarkable ability to instantly modulate body coloration and patterns so as to blend into surrounding environments [1, 2] or send warning signals to other animals [3]. Reflectin is expressed exclusively in cephalopods, filling the lamellae of intracellular Bragg reflectors that exhibit dynamic iridescence and structural color change [4]. Here, we trace the possible origin of the reflectin gene back to a transposon from the symbiotic bioluminescent bacterium Vibrio fischeri and report the hierarchical structural architecture of reflectin protein...
August 31, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28877333/octopus-like-2-a-novel-player-in-arabidopsis-root-and-vascular-development-reveals-a-key-role-for-octopus-family-genes-in-root-metaphloem-sieve-tube-differentiation
#5
M Aguila Ruiz Sola, Mario Coiro, Simona Crivelli, Samuel C Zeeman, Signe Schmidt Kjølner Hansen, Elisabeth Truernit
Protophloem and metaphloem sieve tubes are essential for transporting carbohydrates and signalling molecules towards sink tissues. OCTOPUS (OPS) was previously identified as an important regulator of protophloem differentiation in Arabidopsis roots. Here, we investigated the role of OCTOPUS-LIKE 2 (OPL2), a gene homologous to OPS. OPL2 expression patterns were analysed, and functional equivalence of OPS and OPL2 was tested. Mutant and double mutant phenotypes were investigated. OPS and OPL2 displayed overlapping expression patterns and a high degree of functional overlap...
September 6, 2017: New Phytologist
https://www.readbyqxmd.com/read/28867348/cellular-computations-underlying-detection-of-gaps-in-sounds-and-lateralizing-sound-sources
#6
REVIEW
Donata Oertel, Xiao-Jie Cao, James R Ison, Paul D Allen
In mammals, acoustic information arises in the cochlea and is transmitted to the ventral cochlear nuclei (VCN). Three groups of VCN neurons extract different features from the firing of auditory nerve fibers and convey that information along separate pathways through the brainstem. Two of these pathways process temporal information: octopus cells detect coincident firing among auditory nerve fibers and transmit signals along monaural pathways, and bushy cells sharpen the encoding of fine structure and feed binaural pathways...
August 31, 2017: Trends in Neurosciences
https://www.readbyqxmd.com/read/28861006/cephalopods-as-predators-a-short-journey-among-behavioral-flexibilities-adaptions-and-feeding-habits
#7
REVIEW
Roger Villanueva, Valentina Perricone, Graziano Fiorito
The diversity of cephalopod species and the differences in morphology and the habitats in which they live, illustrates the ability of this class of molluscs to adapt to all marine environments, demonstrating a wide spectrum of patterns to search, detect, select, capture, handle, and kill prey. Photo-, mechano-, and chemoreceptors provide tools for the acquisition of information about their potential preys. The use of vision to detect prey and high attack speed seem to be a predominant pattern in cephalopod species distributed in the photic zone, whereas in the deep-sea, the development of mechanoreceptor structures and the presence of long and filamentous arms are more abundant...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28860996/prey-capture-ingestion-and-digestion-dynamics-of-octopus-vulgaris-paralarvae-fed-live-zooplankton
#8
Manuel Nande, Pablo Presa, Álvaro Roura, Paul L R Andrews, Montse Pérez
Octopus vulgaris is a species of great interest in research areas such as neurobiology, ethology, and ecology but also a candidate species for aquaculture as a food resource and for alleviating the fishing pressure on its wild populations. This study aimed to characterize the predatory behavior of O. vulgaris paralarvae and to quantify their digestive activity. Those processes were affordable using the video-recording analysis of 3 days post-hatching (dph), mantle-transparent paralarvae feeding on 18 types of live zooplanktonic prey...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28810794/communication-stiff-and-soft-nano-environments-and-the-octopus-effect-are-the-crux-of-ionic-liquid-structural-and-dynamical-heterogeneity
#9
Ryan P Daly, Juan C Araque, Claudio J Margulis
In a recent set of articles [J. C. Araque et al., J. Phys. Chem. B 119(23), 7015-7029 (2015) and J. C. Araque et al., J. Chem. Phys. 144, 204504 (2016)], we proposed the idea that for small neutral and charged solutes dissolved in ionic liquids, deviation from simple hydrodynamic predictions in translational and rotational dynamics can be explained in terms of diffusion through nano-environments that are stiff (high electrostriction, charge density, and number density) and others that are soft (charge depleted)...
August 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28809786/octopus-a-design-methodology-for-motion-capture-wearables
#10
Javier Marin, Teresa Blanco, Jose J Marin
Human motion capture (MoCap) is widely recognised for its usefulness and application in different fields, such as health, sports, and leisure; therefore, its inclusion in current wearables (MoCap-wearables) is increasing, and it may be very useful in a context of intelligent objects interconnected with each other and to the cloud in the Internet of Things (IoT). However, capturing human movement adequately requires addressing difficult-to-satisfy requirements, which means that the applications that are possible with this technology are held back by a series of accessibility barriers, some technological and some regarding usability...
August 15, 2017: Sensors
https://www.readbyqxmd.com/read/28790921/fatty-acid-profile-of-neutral-and-polar-lipid-fraction-of-wild-eggs-and-hatchlings-from-wild-and-captive-reared-broodstock-of-octopus-vulgaris
#11
Juan Estefanell, Antonio Mesa-Rodríguez, Besay Ramírez, Antonio La Barbera, Juan Socorro, Carmen María Hernandez-Cruz, María Soledad Izquierdo
The culture of Octopus vulgaris is constrained by unsolved problems in paralarvae rearing, mainly associated to the unknown nutritional requirements of this species in early stages. In this article we studied the fatty acid profile (total, neutral, and polar lipid fractions) in wild eggs and wild hatchlings, collected in Gran Canaria (SW) (Spain) with artificial dens, in comparison to hatchlings obtained in captivity from broodstock fed on trash fish species. Total lipids were 11.5-13.5% dw, with the polar fraction representing a 70...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28769814/the-digestive-tract-of-cephalopods-a-neglected-topic-of-relevance-to-animal-welfare-in-the-laboratory-and-aquaculture
#12
REVIEW
António V Sykes, Eduardo Almansa, Gavan M Cooke, Giovanna Ponte, Paul L R Andrews
Maintenance of health and welfare of a cephalopod is essential whether it is in a research, aquaculture or public display. The inclusion of cephalopods in the European Union legislation (Directive 2010/63/EU) regulating the use of animals for scientific purposes has prompted detailed consideration and review of all aspects of the care and welfare of cephalopods in the laboratory but the information generated will be of utility in other settings. We overview a wide range of topics of relevance to cephalopod digestive tract physiology and their relationship to the health and welfare of these animals...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28769811/feeding-relationship-between-octopus-vulgaris-cuvier-1797-early-life-cycle-stages-and-their-prey-in-the-western-iberian-upwelling-system-correlation-of-reciprocal-lipid-and-fatty-acid-contents
#13
Sílvia Lourenço, Álvaro Roura, María-José Fernández-Reiriz, Luís Narciso, Ángel F González
Under the influence of the Western Iberian upwelling system, the Iberian Atlantic coast holds important hatcheries and recruitment areas for Octopus vulgaris. Recently identified as an octopus hatchery, the Ría de Vigo harbors an important mesozooplankton community that supports O. vulgaris paralarvae during the first days of their planktonic stage. This study represents a preliminary approach to determine the nutritional link between wild O. vulgaris hatchlings, paralarvae and their zooplankton prey in the Ría de Vigo, by analyzing their lipid class content and fatty acid profiles...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28767049/learning-dynamic-models-for-open-loop-predictive-control-of-soft-robotic-manipulators
#14
Thomas George Thuruthel, Egidio Falotico, Federico Renda, Cecilia Laschi
The soft capabilities of biological appendages like the arms of Octopus Vulgaris and Elephant trunk have inspired roboticists to develop their robotic equivalents. Although there have been considerable efforts to replicate their morphology and behaviour patterns, we are still lagging behind in replicating the dexterity and efficiency of these biological systems. This is mostly due to the lack of development and application of dynamic controllers on these robots which could exploit the morphological properties that a soft bodied manipulator possesses...
August 2, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28764136/an-eco-friendly-approach-for-heavy-metal-adsorbent-regeneration-using-co2-responsive-molecular-octopus
#15
Yu Bai, Yen Nan Liang, Xiao Hu
Perennial problems of adsorption in wastewater treatment include adsorbent recycling, generation of waste sludge and secondary pollution because harmful concentrated acids, bases or strong chelators are often used for adsorbent regeneration and adsorbate recovery. We report, for the first time, an eco-friendly regeneration concept demonstrated with a CO2-responsive octopus-like polymeric adsorbent. Various heavy metals can be scavenged at very high Qe by such adsorbent through coordination. Most importantly, the rapid and complete regeneration of the adsorbent and recovery of the heavy metal ions can be readily achieved by CO2 bubbling within a few minutes under mild conditions, i...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28751029/spatial-distribution-of-marine-debris-on-the-seafloor-of-moroccan-waters
#16
S Loulad, R Houssa, H Rhinane, A Boumaaz, A Benazzouz
Marine debris pollution is considered as a worldwide problem and a direct threat to the environment, economy and human health. In this paper, we provide the first quantitative assessment of debris on the seafloor of the southern part of the economic exclusive waters of Morocco. The data were collected in a scientific trawl survey carried out from 5 to 25 October 2014 between (26N) to (21N) covering different stratums of depths (from 10 to 266m) and following a sampling network of 100 stations distributed randomly in the study area...
July 24, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28739506/glycosaminoglycans-from-marine-sources-as-therapeutic-agents
#17
REVIEW
Jesus Valcarcel, Ramon Novoa-Carballal, Ricardo I Pérez-Martín, Rui L Reis, José Antonio Vázquez
Glycosaminoglycans (GAGs) in marine animals are different to those of terrestrial organisms, mainly in terms of molecular weight and sulfation. The therapeutic properties of GAGs are related to their ability to interact with proteins, which is very much influenced by sulfation position and patterns. Since currently GAGs cannot be chemically synthesized, they are sourced from natural products, with high intra- but also inter-species variability, in terms of chain length, disaccharide composition and sulfation pattern...
July 21, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28725198/3d-reconstruction-of-the-digestive-system-in-octopus-vulgaris-cuvier-1797-embryos-and-paralarvae-during-the-first-month-of-life
#18
Raquel Fernández-Gago, Martin Heß, Heidemarie Gensler, Francisco Rocha
Octopus vulgaris aquaculture is limited due to poor biological knowledge of the paralarval stages (e.g., digestive system functionality), their nutritional requirements (e.g., adequate live diet) and standardization of rearing techniques. These factors are important in explaining the high mortality rate observed in this developmental stage under culture conditions. For a better understanding of nutrition biology of this species, we investigated the 3D microanatomy of the digestive tract of the embryo and paralarvae during the first month of life...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28675144/a-soft-multi-module-manipulator-with-variable-stiffness-for-minimally-invasive-surgery
#19
Iris De Falco, Matteo Cianchetti, Arianna Menciassi
This work presents a soft manipulator for minimally invasive surgery (MIS) inspired by the biological capabilities of the octopus arm. The multi-module arm is composed of three identical units able to move thanks to embedded fluidic actuators which allow omnidirectional bending and elongation, typical movements of the octopus. The use of soft materials makes the arm safe, adaptable and compliant with tissues. In addition, a granular jamming-based stiffening mechanism is integrated in each module with the aim of tuning the stiffness of the manipulator and controlling the interactions with biological structures...
June 30, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28670288/time-course-of-metabolic-capacities-in-paralarvae-of-the-common-octopus-octopus-vulgaris-in-the-first-stages-of-life-searching-biomarkers-of-nutritional-imbalance
#20
Amalia E Morales, Gabriel Cardenete, M Carmen Hidalgo, Diego Garrido, M Virginia Martín, Eduardo Almansa
The culture of the common octopus (Octopus vulgaris) is promising since the species has a relatively short lifecycle, rapid growth, and high food conversion ratios. However, recent attempts at successful paralarvae culture have failed due to slow growth and high mortality rates. Establishing an optimal nutritional regime for the paralarvae seems to be the impeding step in successful culture methods. Gaining a thorough knowledge of food regulation and assimilation is essential for paralarvae survival and longevity under culture conditions...
2017: Frontiers in Physiology
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