keyword
MENU ▼
Read by QxMD icon Read
search

Octopus

keyword
https://www.readbyqxmd.com/read/28634470/the-dark-side-of-the-mushroom-spring-microbial-mat-life-in-the-shadow-of-chlorophototrophs-ii-metabolic-functions-of-abundant-community-members-predicted-from-metagenomic-analyses
#1
Vera Thiel, Michael Hügler, David M Ward, Donald A Bryant
Microbial mat communities in the effluent channels of Octopus and Mushroom Springs within the Lower Geyser Basin of Yellowstone National Park have been extensively characterized. Previous studies have focused on the chlorophototrophic organisms of the phyla Cyanobacteria and Chloroflexi. However, the diversity and metabolic functions of the other portion of the community in the microoxic/anoxic region of the mat are poorly understood. We recently described the diverse but extremely uneven microbial assemblage in the undermat of Mushroom Spring based on 16S rRNA amplicon sequences, which was dominated by Roseiflexus members, filamentous anoxygenic chlorophototrophs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28632275/architectures-of-soft-robotic-locomotion-enabled-by-simple-mechanical-principles
#2
Liangliang Zhu, Yunteng Cao, Yilun Liu, Zhe Yang, Xi Chen
In nature, a variety of limbless locomotion patterns flourish, from the small or basic life forms (Escherichia coli, amoebae, etc.) to the large or intelligent creatures (e.g., slugs, starfishes, earthworms, octopuses, jellyfishes, and snakes). Many bioinspired soft robots based on locomotion have been developed in the past few decades. In this work, based on the kinematics and dynamics of two representative locomotion modes (i.e., worm-like crawling and snake-like slithering), we propose a broad set of innovative designs for soft mobile robots through simple mechanical principles...
June 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28632031/mr-imaging-of-the-anterior-visual-pathway-in-primary-open-angle-glaucoma-correlation-with-octopus-101-perimetry-and-spectralis-optical-coherence-tomography-findings
#3
Mehmet Giray Ersoz, Yeliz Pekcevik, Emre Ayintap, İrfan Botan Gunes, Duygu Kunak Mart, Ersin Yucel, Gamze Türe
PURPOSE: To investigate structural changes in the visual pathway measured by magnetic resonance imaging (MRI) and its relationship with the clinical severity of glaucoma in primary open-angle glaucoma (POAG) patients. MATERIALS AND METHODS: The study included 28 patients with POAG and 26 age- and sex-matched healthy volunteers. All the subjects underwent spectral domain optical coherence tomography (OCT) of the peripapillary retina nerve fiber layer (RNFL). The optic nerve diameter (OND), chiasma height (Ch), and lateral geniculate nucleus height (LGNh) were measured bilaterally using a 1...
February 28, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28627384/cadherin-genes-and-evolutionary-novelties-in-the-octopus
#4
REVIEW
Z Yan Wang, Clifton W Ragsdale
All animals with large brains must have molecular mechanisms to regulate neuronal process outgrowth and prevent neurite self-entanglement. In vertebrates, two major gene families implicated in these mechanisms are the clustered protocadherins and the atypical cadherins. However, the molecular mechanisms utilized in complex invertebrate brains, such as those of the cephalopods, remain largely unknown. Recently, we identified protocadherins and atypical cadherins in the octopus. The octopus protocadherin expansion shares features with the mammalian clustered protocadherins, including enrichment in neural tissues, clustered head-to-tail orientations in the genome, and a large first exon encoding all cadherin domains...
June 13, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28620315/you-are-what-you-eat-a-genomic-analysis-of-the-gut-microbiome-of-captive-and-wild-octopus-vulgaris-paralarvae-and-their-zooplankton-prey
#5
Álvaro Roura, Stephen R Doyle, Manuel Nande, Jan M Strugnell
The common octopus (Octopus vulgaris) is an attractive species for aquaculture, however, several challenges inhibit sustainable commercial production. Little is known about the early paralarval stages in the wild, including diet and intestinal microbiota, which likely play a significant role in development and vitality of this important life stage. High throughput sequencing was used to characterize the gastrointestinal microbiome of wild O. vulgaris paralarvae collected from two different upwelling regions off the coast of North West Spain (n = 41) and Morocco (n = 35)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28620313/digestive-physiology-of-octopus-maya-and-o-mimus-temporality-of-digestion-and-assimilation-processes
#6
REVIEW
Pedro Gallardo, Alberto Olivares, Rosario Martínez-Yáñez, Claudia Caamal-Monsreal, Pedro M Domingues, Maite Mascaró, Ariadna Sánchez, Cristina Pascual, Carlos Rosas
Digestive physiology is one of the bottlenecks of octopus aquaculture. Although, there are successful experimentally formulated feeds, knowledge of the digestive physiology of cephalopods is fragmented, and focused mainly on Octopus vulgaris. Considering that the digestive physiology could vary in tropical and sub-tropical species through temperature modulations of the digestive dynamics and nutritional requirements of different organisms, the present review was focused on the digestive physiology timing of Octopus maya and Octopus mimus, two promising aquaculture species living in tropical (22-30°C) and sub-tropical (15-24°C) ecosystems, respectively...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28620283/octopus-cells-in-the-posteroventral-cochlear-nucleus-provide-the-main-excitatory-input-to-the-superior-paraolivary-nucleus
#7
Richard A Felix Ii, Boris Gourévitch, Marcelo Gómez-Álvarez, Sara C M Leijon, Enrique Saldaña, Anna K Magnusson
Auditory streaming enables perception and interpretation of complex acoustic environments that contain competing sound sources. At early stages of central processing, sounds are segregated into separate streams representing attributes that later merge into acoustic objects. Streaming of temporal cues is critical for perceiving vocal communication, such as human speech, but our understanding of circuits that underlie this process is lacking, particularly at subcortical levels. The superior paraolivary nucleus (SPON), a prominent group of inhibitory neurons in the mammalian brainstem, has been implicated in processing temporal information needed for the segmentation of ongoing complex sounds into discrete events...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28617467/a-wet-tolerant-adhesive-patch-inspired-by-protuberances-in-suction-cups-of-octopi
#8
Sangyul Baik, Da Wan Kim, Youngjin Park, Tae-Jin Lee, Suk Ho Bhang, Changhyun Pang
Adhesion strategies that rely on mechanical interlocking or molecular attractions between surfaces can suffer when coming into contact with liquids. Thus far, artificial wet and dry adhesives have included hierarchical mushroom-shaped or porous structures that allow suction or capillarity, supramolecular structures comprising nanoparticles, and chemistry-based attractants that use various protein polyelectrolytes. However, it is challenging to develop adhesives that are simple to make and also perform well-and repeatedly-under both wet and dry conditions, while avoiding non-chemical contamination on the adhered surfaces...
June 14, 2017: Nature
https://www.readbyqxmd.com/read/28617458/materials-science-how-to-suck-like-an-octopus
#9
Jonathan J Wilker
No abstract text is available yet for this article.
June 14, 2017: Nature
https://www.readbyqxmd.com/read/28608484/control-of-abusive-water-addition-to-octopus-vulgaris-with-non-destructive-methods
#10
Rogério Mendes, Ove Schimmer, Helena Vieira, João Pereira, Bárbara Teixeira
BACKGROUND: Abusive water adition to octopus has evidenced the need for quick non-destructive methods for product qualification in the industry and control of fresh commercial products in markets. Electric conductivity (EC)/pH and dielectric property measurements were selected to detect water uptake in octopus. RESULTS: A significant EC decrease was determined after soaking octopus in freshwater for 4 h. EC reflected the water uptake of octopus and the correspondent concentration decrease of available ions in the interstitial fluid...
June 12, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28596735/diet-composition-and-variability-of-wild-octopus-vulgaris-and-alloteuthis-media-cephalopoda-paralarvae-a-metagenomic-approach
#11
Lorena Olmos-Pérez, Álvaro Roura, Graham J Pierce, Stéphane Boyer, Ángel F González
The high mortality of cephalopod early stages is the main bottleneck to grow them from paralarvae to adults in culture conditions, probably because the inadequacy of the diet that results in malnutrition. Since visual analysis of digestive tract contents of paralarvae provides little evidence of diet composition, the use of molecular tools, particularly next generation sequencing (NGS) platforms, offers an alternative to understand prey preferences and nutrient requirements of wild paralarvae. In this work, we aimed to determine the diet of paralarvae of the loliginid squid Alloteuthis media and to enhance the knowledge of the diet of recently hatched Octopus vulgaris paralarvae collected in different areas and seasons in an upwelling area (NW Spain)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28567020/dietary-effect-on-the-proteome-of-the-common-octopus-octopus-vulgaris-paralarvae
#12
Inmaculada Varó, Gabriel Cardenete, Francisco Hontoria, Óscar Monroig, José Iglesias, Juan J Otero, Eduardo Almansa, Juan C Navarro
Nowadays, the common octopus (Octopus vulgaris) culture is hampered by massive mortalities occurring during early life-cycle stages (paralarvae). Despite the causes of the high paralarvae mortality are not yet well-defined and understood, the nutritional stress caused by inadequate diets is pointed out as one of the main factors. In this study, the effects of diet on paralarvae is analyzed through a proteomic approach, to search for novel biomarkers of nutritional stress. A total of 43 proteins showing differential expression in the different conditions studied have been identified...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28562467/assistive-techniques-for-proximal-anastomosis-in-minimally-invasive-coronary-artery-bypass-grafting
#13
Keita Kikuchi, Yoshiki Endo
We introduce assistive techniques for proximal anastomosis in off-pump minimally invasive coronary artery bypass grafting (MICS CABG) to overcome difficult access to the ascending aorta in MICS CABG. An 8-cm left thoracotomy is made in the fifth intercostal space. ThoraTrak retractor (Medtronic Inc, Minneapolis, MN USA) is used to open the thoracotomy and is pulled to the cephalad and rightward direction toward to the ascending aorta. The pericardium is opened from the ascending aorta to the left ventricular apex and to the inferior vena cava...
May 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28559849/epigenetic-dna-methylation-mediating-octopus-vulgaris-early-development-effect-of-essential-fatty-acids-enriched-diet
#14
Pablo García-Fernández, Danie García-Souto, Eduardo Almansa, Paloma Morán, Camino Gestal
The common octopus, Octopus vulgaris, is a good candidate for aquaculture but a sustainable production is still unviable due to an almost total mortality during the paralarvae stage. DNA methylation regulates gene expression in the eukaryotic genome, and has been shown to exhibit plasticity throughout O. vulgaris life cycle, changing profiles from paralarvae to adult stages. This pattern of methylation could be sensitive to small alterations in nutritional and environmental conditions during the species early development, thus impacting on its health, growth and survival...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28559603/octopus-vulgaris-protein-hydrolysates-characterization-antioxidant-and-functional-properties
#15
Rabeb Ben Slama-Ben Salem, Intidhar Bkhairia, Ola Abdelhedi, Moncef Nasri
Composition, functional properties and in vitro antioxidant activities of octopus (Octopus vulgaris) protein hydrolysates (OPHs) were evaluated. OPHs were prepared by treatment with commercial Esperase (OPH-Esp), alkaline protease extract from Zebra blenny (Salaria basilica) (OPH-ZB) and enzyme preparation from Bacillus subtilis A26 (OPH-A26). OPHs showed different degrees of hydrolysis (DH from 17.6 to 21%), and hydrophobic/hydrophilic peptide ratio. The amino acid profiles of OPHs showed a high level of essential amino acids, and Lys was the most abundant amino acid...
May 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28557829/progressive-decrease-of-peripapillary-angioflow-vessel-density-during-structural-and-visual-field-progression-in-early-primary-open-angle-glaucoma
#16
Gábor Holló
PURPOSE: To present a case of early primary open-angle glaucoma in which retinal nerve fiber layer thickness (RNFLT), ganglion cell complex (GCC), and visual field progression were accompanied with significant progression of peripapillary angioflow vessel density (PAFD) measured with optical coherence tomographic angiography. METHODS: A 68-year-old female patient who was under topical intraocular pressure (IOP) lowering medication for 20 years for ocular hypertension of the right and preperimetric primary open-angle glaucoma of the left eye (with reproducible inferotemporal and superotemporal neuroretinal rim and RNFL loss) was prospectively imaged with the AngioVue OCT for RNFLT, GCC thickness, and PAFD, and investigated with the Octopus Normal G2 visual field test on the same days at 6-month intervals for 18 months, while the IOP of the left eye escaped from control...
May 26, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28555185/molecular-determinants-of-cephalopod-muscles-and-their-implication-in-muscle-regeneration
#17
REVIEW
Letizia Zullo, Sara M Fossati, Pamela Imperadore, Marie-Therese Nödl
The ability to regenerate whole-body structures has been studied for many decades and is of particular interest for stem cell research due to its therapeutic potential. Several vertebrate and invertebrate species have been used as model systems to study pathways involved in regeneration in the past. Among invertebrates, cephalopods are considered as highly evolved organisms, which exhibit elaborate behavioral characteristics when compared to other mollusks including active predation, extraordinary manipulation, and learning abilities...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28553561/diagnostic-ability-and-repeatability-of-a-new-supra-threshold-glaucoma-screening-program-in-standard-automated-perimetry
#18
Natsumi Takahashi, Kazunori Hirasawa, Miki Hoshina, Masayuki Kasahara, Kazuhiro Matsumura, Nobuyuki Shoji
PURPOSE: We assess the diagnostic ability and repeatability of a new suprathreshold glaucoma screening test (GST) comprising 28 test points and a 1-of-3 sampling strategy at 95% of the normal limit for standard automated perimetry (SAP) in early to advanced glaucoma. METHODS: This prospective cross-sectional study included 96 eyes of patients with early, moderate, or advanced glaucoma and 37 eyes of normal controls. Participants were evaluated by the G-Dynamic threshold test once and the GST twice, in random order, using the Octopus 600 perimeter...
May 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28534180/the-c-terminal-kinesin-motor-kifc1-may-participate-in-nuclear-reshaping-and-flagellum-formation-during-spermiogenesis-of-larimichthys-crocea
#19
Dan-Dan Zhang, Xin-Ming Gao, Yong-Qiang Zhao, Cong-Cong Hou, Jun-Quan Zhu
Spermatogenesis is a highly ordered process in the differentiation of male germ cells. Nuclear morphogenesis is one of the most fundamental cellular transformations to take place during spermatogenesis. These striking transformations from spermatogonia to spermatozoa are a result of phase-specific adaption of the cytoskeleton and its association with molecular motor proteins. KIFC1 is a C-terminal kinesin motor protein that plays an essential role in acrosome formation and nuclear reshaping during spermiogenesis in mammals...
May 23, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28501082/a-high-content-screening-technology-for-quantitatively-studying-podocyte-dynamics
#20
REVIEW
Jochen Reiser, Ha Won Lee, Vineet Gupta, Mehmet M Altintas
Podocytes form the visceral layer of a kidney glomerulus and express a characteristic octopus-like cellular architecture specialized for the ultrafiltration of blood. The cytoskeletal dynamics and structural elasticity of podocytes rely on the self-organization of highly interconnected actin bundles, and the maintenance of these features is important for the intact glomerular filtration. Development of more differentiated podocytes in culture has dramatically increased our understanding of the molecular mechanisms regulating podocyte actin dynamics...
May 2017: Advances in Chronic Kidney Disease
keyword
keyword
66105
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"