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https://www.readbyqxmd.com/read/28816245/ram-pressure-feeding-of-supermassive-black-holes
#1
Bianca M Poggianti, Yara L Jaffé, Alessia Moretti, Marco Gullieuszik, Mario Radovich, Stephanie Tonnesen, Jacopo Fritz, Daniela Bettoni, Benedetta Vulcani, Giovanni Fasano, Callum Bellhouse, George Hau, Alessandro Omizzolo
When a supermassive black hole at the centre of a galaxy accretes matter, it gives rise to a highly energetic phenomenon: an active galactic nucleus. Numerous physical processes have been proposed to account for the funnelling of gas towards the galactic centre to feed the black hole. There are also several physical processes that can remove gas from a galaxy, one of which is ram-pressure stripping by the hot gas that fills the space between galaxies in galaxy clusters. Here we report that six out of a sample of seven 'jellyfish' galaxies-galaxies with long 'tentacles' of material that extend for dozens of kiloparsecs beyond the galactic disks-host an active nucleus, and two of them also have galactic-scale ionization cones...
August 16, 2017: Nature
https://www.readbyqxmd.com/read/28814953/in-vitro-characterization-of-jellyfish-venom-fibrin-ogen-olytic-enzymes-from-nemopilema-nomurai
#2
Seong Kyeong Bae, Hyunkyoung Lee, Yunwi Heo, Min Jung Pyo, Indu Choudhary, Chang Hoon Han, Won Duk Yoon, Changkeun Kang, Euikyung Kim
BACKGROUND: Because jellyfish are capable of provoking envenomation in humans, they are considered hazardous organisms. Although the effects of their toxins are a matter of concern, information on the venom components, biological activity and pathological mechanisms are still scarce. Therefore, the aim of the present study was to investigate a serine protease component of Nemopilema nomurai jellyfish venom (NnV) and unveil its characteristics. METHODS: To determine the relationship between fibrinolytic activity of NnV and the serine protease, fibrin zymography was performed using metalloprotease and serine protease inhibitors...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28781190/impingement-of-marine-organisms-in-a-tropical-atomic-power-plant-cooling-water-system
#3
S Barath Kumar, A K Mohanty, N P I Das, K K Satpathy, S K Sarkar
A one-year impingement monitoring was conducted at Madras Atomic Power Station (MAPS), Kalpakkam, southeastern coast of India and identified a total of 67 species of marine organisms in the cooling water system. Estimates of total annual impingement contributed about 1.47×10(6) individuals and 142.5t of biomass. Jellyfish contributed about 6.8×10(5) individuals and 135.6t of biomass. Crabs, shrimps and fish were the most vulnerable organisms contributing about 4.29×10(5) individuals, 1.39×10(5) individuals and 2...
August 3, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28777817/effect-of-tea-saponin-on-ephyrae-and-polyps-of-the-moon-jellyfish-aurelia-sp-1
#4
Zhijun Dong, Tingting Sun, Likun Liang, Lei Wang
The moon jellyfish (Aurelia sp.1) is thought to be a nuisance for the sea cucumber aquaculture, which commonly occur in the sea cucumber (Apostichopus japonicus) culture ponds of the Yellow Sea, China. To develop an appropriate method to control Aurelia sp.1 blooms, the toxic effects of tea saponin on Aurelia sp.1 ephyrae and polyps were tested in laboratory experiments. Our results revealed that tea saponin caused significant morphological changes, behavioral abnormality and mortality in Aurelia sp.1 ephyrae and polyps in 24 h and 48 h exposure experiments...
2017: PloS One
https://www.readbyqxmd.com/read/28746410/environmental-factors-influencing-the-spatio-temporal-distribution-of-carybdea-marsupialis-lineo-1978-cubozoa-in-south-western-mediterranean-coasts
#5
Antonio Canepa, Verónica Fuentes, Mar Bosch-Belmar, Melissa Acevedo, Kilian Toledo-Guedes, Antonio Ortiz, Elia Durá, César Bordehore, Josep-Maria Gili
Jellyfish blooms cause important ecological and socio-economic problems. Among jellyfish, cubozoans are infamous for their painful, sometimes deadly, stings and are a major public concern in tropical to subtropical areas; however, there is little information about the possible causes of their outbreaks. After a bloom of the cubomedusa Carybdea marsupialis (Carybdeidae) along the coast of Denia (SW Mediterranean, Spain) in 2008 with negative consequences for local tourism, the necessity to understand the ecological restrictions on medusae abundance was evident...
2017: PloS One
https://www.readbyqxmd.com/read/28743285/%C3%AE-adrenergic-receptor-camp-pka-signaling-contributes-to-the-intracellular-ca-2-release-by-tentacle-extract-from-the-jellyfish-cyanea-capillata
#6
Qianqian Wang, Hui Zhang, Bo Wang, Chao Wang, Liang Xiao, Liming Zhang
BACKGROUND: Intracellular Ca(2+) overload induced by extracellular Ca(2+) entry has previously been confirmed to be an important mechanism for the cardiotoxicity as well as the acute heart dysfunction induced by jellyfish venom, while the underlying mechanism remains to be elucidated. METHODS: Under extracellular Ca(2+)-free or Ca(2+)-containing conditions, the Ca(2+) fluorescence in isolated adult mouse cardiomyocytes pre-incubated with tentacle extract (TE) from the jellyfish Cyanea capillata and β blockers was scanned by laser scanning confocal microscope...
July 25, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28741862/in-vivo-comparison-of-jellyfish-and-bovine-collagen-sponges-as-prototype-medical-devices
#7
Jonathan P Widdowson, Alex J Picton, Valerie Vince, Chris J Wright, Andrew Mearns-Spragg
Jellyfish have emerged as a source of next generation collagen that is an attractive alternative to existing sources, such as bovine and porcine, due to a plentiful supply and providing a safer source through lack of bovine spongiform encephalopathy (BSE) transmission risk and potential viral vectors, both of which could be transmitted to humans. Here we compare collagen implantable sponges derived for the first time from the Rhizostoma pulmo jellyfish. A further novelty for the research was that there was a comparison for sponges that were either uncrosslinked or crosslinked using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC), and an assessment on how this affected resorption, as well as their biocompatibility compared to bovine type I collagen sponges...
July 25, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28734075/high-occurrence-of-jellyfish-predation-by-black-browed-and-campbell-albatross-identified-by-dna-metabarcoding
#8
Julie C McInnes, Rachael Alderman, Mary-Anne Lea, Ben Raymond, Bruce E Deagle, Richard A Phillips, Andrew Stanworth, David R Thompson, Paulo Catry, Henri Weimerskirch, Cristián G Suazo, Michaël Gras, Simon N Jarman
Gelatinous zooplankton are a large component of the animal biomass in all marine environments, but are considered to be uncommon in the diet of most marine top predators. However, the diets of key predator groups like seabirds have conventionally been assessed from stomach content analyses, which cannot detect most gelatinous prey. As marine top predators are used to identify changes in the overall species composition of marine ecosystems, such biases in dietary assessment may impact our detection of important ecosystem regime shifts...
July 22, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28733393/microscopic-observation-of-living-cells-stained-with-fluorescent-probes
#9
Haruhiko Asakawa, Da-Qiao Ding, Tokuko Haraguchi, Yasushi Hiraoka
Fluorescence imaging of living cells provides a unique opportunity to follow dynamic behavior of specific molecules under physiological conditions. In the fission yeast Schizosaccharomyces pombe, expression of a target protein genetically fused with a fluorescent protein such as the jellyfish green fluorescent protein (GFP) is widely used. In addition, fluorescent chemical reagents are also used to stain specific molecules (e.g., Hoechst 33324 to stain DNA). Specimens of S. pombe cells for live cell imaging are prepared by either of two methods: sandwiching the cells between glass coverslips and by mounting the cells on a glass-bottom culture dish...
July 21, 2017: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/28717866/mir-30a-positively-regulates-the-inflammatory-response-of-microglia-in-experimental-autoimmune-encephalomyelitis
#10
Xue Fang, Dingya Sun, Zhihong Wang, Zhongwang Yu, Weili Liu, Yingyan Pu, Dan Wang, Aijun Huang, Mingdong Liu, Zhenghua Xiang, Cheng He, Li Cao
Multiple sclerosis (MS) is a classical inflammatory demyelinating disease of the central nervous system (CNS). Microglia are the main resident immune cells in the CNS and are closely associated with the pathogenesis of MS. In the present study, we found that miR-30a was highly expressed in jellyfish-like microglia in chronic active lesions of MS patients, as well as in the microglia of mice with experimental autoimmune encephalomyelitis (EAE) at the chronic phase. In vitro, the conditioned supernatant of mouse microglia overexpressing miR-30a promoted the apoptosis of oligodendrocyte precursor cells (OPCs), and inhibited OPC differentiation...
July 17, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28713189/the-animal-sensorimotor-organization-a-challenge-for-the-environmental-complexity-thesis
#11
Fred Keijzer, Argyris Arnellos
Godfrey-Smith's environmental complexity thesis (ECT) is most often applied to multicellular animals and the complexity of their macroscopic environments to explain how cognition evolved. We think that the ECT may be less suited to explain the origins of the animal bodily organization, including this organization's potentiality for dealing with complex macroscopic environments. We argue that acquiring the fundamental sensorimotor features of the animal body may be better explained as a consequence of dealing with internal bodily-rather than environmental complexity...
2017: Biology & Philosophy
https://www.readbyqxmd.com/read/28711467/retrospective-study-of-jellyfish-envenomation-in-emergency-wards-in-guadeloupe-between-2010-and-2016-when-to-diagnose-irukandji-syndrome
#12
Djoudi Bouyer-Monot, Stéphane Pelczar, Serge Ferracci, Denis Boucaud-Maitre
BACKGROUND: In Guadeloupe (French West Indies), many marine envenomation cases by jellyfish are observed. Some of them might induce an Irukandji syndrome (IS). The aim of this study was to analyse the clinical features of IS from the envenomation cases in the two public hospitals in Guadeloupe, and to compare them to non-IS stings. METHODS: All jellyfish envenomation cases between the 1st of January 2010 and the 1st of September 2016, from the emergencies data-base, have been extracted...
July 13, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28701647/the-case-of-a-14-year-old-boy-who-experienced-anaphylaxis-due-to-jellyfish-mastigias-papua-ingestion
#13
Shohei Kubota, Asako Nozawa, Takanori Yanai, Koji Ozasa, Satomi Mori, Kazuyuki Kurihara
We report a case of jellyfish allergy diagnosed via an oral food challenge. A 14-year-old boy had no history of jellyfish stings and had been eating commercially available jellyfish products twice yearly for the past 5-6 years. Five minutes after eating a commercially available boiled jellyfish product (100g), he experienced nausea, wheezing, and erythema and had visited our hospital. We suspected an anaphylactic reaction and treated him with intramuscular adrenaline injection, corticosteroid and antihistamine infusions, volume resuscitation, and salbutamol sulfate inhalation, which resulted in an improvement of the symptoms...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28701646/an-adult-case-of-anaphylaxis-caused-by-allergy-to-jellyfish
#14
Shintaro Suzuki, Yoshito Miyata, Megumi Jinno, Yasunari Kishino, Tetsuya Homma, Shin Ota, Akihiko Tanaka, Takuya Yokoe, Tsukasa Ohnishi, Hironori Sagara, Naomi Kurata, Kuniyoshi Shimakura, Kouichi Kurose
A 35-year-old female, professional diver, reported nausea, vomiting, and systemic hives 20 to 30 minutes after ingestion of antipasto made with jellyfish. Patient reported prior episodes of swelling after stings from several different creatures, including jelly fish. She also developed a systemic allergic reaction after sting from an unknown creature while diving. On the initial visit to our hospital, serum total IgE level was 545IU/ml. We extracted crude allergen from jellyfish and evaluated allergen specific IgE antibody levels using ELISA...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28686221/evaluation-of-cyanea-capillata-sting-management-protocols-using-ex-vivo-and-in-vitro-envenomation-models
#15
Thomas K Doyle, Jasmine L Headlam, Christie L Wilcox, Eoin MacLoughlin, Angel A Yanagihara
Lion's mane jellyfish (Cyanea capillata) stings cause severe pain and can lead to dangerous systemic effects, including Irukandji-like syndrome. As is the case for most cnidarian stings, recommended medical protocols in response to such stings lack rigorous scientific support. In this study, we sought to evaluate potential first aid care protocols using previously described envenomation models that allow for direct measurements of venom activity. We found that seawater rinsing, the most commonly recommended method of tentacle removal for this species, induced significant increases in venom delivery, while rinsing with vinegar or Sting No More(®) Spray did not...
July 7, 2017: Toxins
https://www.readbyqxmd.com/read/28686117/predicting-ischemic-stroke-after-carotid-artery-stenting-based-on-proximal-calcification-and-the-jellyfish-sign
#16
Nobuhiko Ichinose, Seiji Hama, Toshio Tsuji, Zu Soh, Hideaki Hayashi, Yoshihiro Kiura, Shigeyuki Sakamoto, Takahito Okazaki, Daizo Ishii, Katsuhiro Shinagawa, Kaoru Kurisu
OBJECTIVE Carotid artery stenting (CAS) has been considered to prevent ischemic strokes caused by stenosis of the cervical carotid artery. The most common complication of CAS is new cerebral infarction. The authors have previously reported that the jellyfish sign-the rise and fall of the mobile component of the carotid plaque surface detected by carotid ultrasonography-suggests thinning and rupture of the fibrous cap over the unstable plaque content, such as the lipid-rich necrotic core or internal plaque hemorrhage...
July 7, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28649681/bio-inspired-colorful-flexible-defrostable-light-scattering-hybrid-films-for-the-effective-distribution-of-led-light
#17
Seongpil An, Hong Seok Jo, Yong Il Kim, Kyo Yong Song, Min-Woo Kim, Kyu Bum Lee, Alexander L Yarin, Sam S Yoon
Bioluminescent jellyfish has a unique structure derived from fiber/polymer interfaces that is advantageous for effective light scattering in the dark, deep sea water. Herein, we demonstrate the fabrication of bio-inspired hybrid films by mimicry of the jellyfish's structure, leading to excellent light-scattering performance and defrosting capability. A haze value reaching 59.3% and a heating temperature of up to 292 °C were achieved with the films. Accordingly, the developed surface constitutes an attractive optical device for lighting applications, especially for street or vehicle luminaries for freezing Arctic-climate countries...
July 6, 2017: Nanoscale
https://www.readbyqxmd.com/read/28639958/pediatric-jellyfish-envenomation-in-the-mediterranean-sea
#18
Miguel Glatstein, Dikla Adir, Bella Galil, Dennis Scolnik, Ayelet Rimon, Dikla Pivko-Levy, Christopher Hoyte
BACKGROUND: Several species of jellyfish native to the western Indian Ocean have entered the Mediterranean Sea through the Suez Canal. Since the late 1980s, each summer Rhopilema nomadica forms swarms as long as 100 km in the southeastern Levant and since the millennium aggregations of additional nonnative jellyfish have been sighted. The aim of this study was to evaluate children seen in the emergency department after jellyfish envenomations and to establish patterns of toxicity associated with this organism...
June 20, 2017: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
https://www.readbyqxmd.com/read/28632275/architectures-of-soft-robotic-locomotion-enabled-by-simple-mechanical-principles
#19
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 28, 2017: Soft Matter
https://www.readbyqxmd.com/read/28614409/environmental-control-of-asexual-reproduction-and-somatic-growth-of-aurelia-spp-cnidaria-scyphozoa-polyps-from-the-adriatic-sea
#20
Nathan Hubot, Cathy H Lucas, Stefano Piraino
Polyps of two moon jellyfish species, Aurelia coerulea and A. relicta, from two Adriatic Sea coastal habitats were incubated under multiple combinations of temperature (14, 21°C), salinity (24, 37 ppt) and food regime (9.3, 18.6, 27.9 μg C ind-1 week-1) to comparatively assess how these factors may influence major asexual reproduction processes in the two species. Both species exhibited a shared pattern of budding mode (Directly Budded Polyps: DBP; Stolonal Budded Polyps: SBP), with DBP favoured under low food supply (9...
2017: PloS One
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