keyword
MENU ▼
Read by QxMD icon Read
search

Kelp

keyword
https://www.readbyqxmd.com/read/27908494/simultaneous-microextraction-of-inorganic-iodine-and-iodinated-amino-acids-by-miniaturized-matrix-solid-phase-dispersion-with-molecular-sieves-and-ionic-liquids
#1
Jun Cao, Li-Qing Peng, Jing-Jing Xu, Li-Jing Du, Qi-Dong Zhang
This study presents an effective method of using miniaturized matrix solid phase dispersion (MSPD) for the microextraction of inorganic iodine and iodinated amino acids from seaweed samples. Quantification of the target analytes was performed by ultrahigh performance liquid chromatography with UV detection. Molecular sieve (SBA-15) was chosen as the dispersing adsorbent with an ionic liquid (1-dodecyl-3-methylimidazolium bromide) as the elution solvent. The experimental conditions for the MSPD, such as the type of sorbent, ratio of sorbent to sample, type and concentration of the elution solvent, and grinding time were evaluated and optimized...
November 25, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27907261/fitting-state-space-integral-projection-models-to-size-structured-time-series-data-to-estimate-unknown-parameters
#2
J Wilson White, Kerry J Nickols, Daniel Malone, Mark H Carr, Richard M Starr, Flora Cordoleani, Marissa L Baskett, Alan Hastings, Louis W Botsford
Integral projection models (IPMs) have a number of advantages over matrix-model approaches for analyzing size-structured population dynamics, because the latter require parameter estimates for each age or stage transition. However, IPMs still require appropriate data. Typically they are parameterized using individual-scale relationships between body size and demographic rates, but these are not always available. We present an alternative approach for estimating demographic parameters from time series of size-structured survey data using a Bayesian state-space IPM (SSIPM)...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27905044/modulatory-effect-of-the-exudates-released-by-the-brown-kelp-lessonia-spicata-on-the-toxicity-of-copper-in-early-developmental-stages-of-ecologically-related-organisms
#3
Alexandre Fellous, Santiago Andrade, Francisco Vidal-Ramirez, Ricardo Calderón, Jessica Beltran, Juan A Correa
Lessonia spicata is a key dominant species along the Pacific coast of South America, providing a habitat for many organisms. However, this role can be affected by abiotic stress, such as metals. To counteract the toxic effect, L. spicata, among other seaweeds, releases exudates that bind metals. In this study, tolerances to copper of organisms related to the kelp forest (spores of Ulva lactuca (Chlorophyceae) and L. spicata (Phaeophyceae) and Zoea I of Taliepus dentatus (Milne-Edwards, Crustacea)) were studied; then, exudates are assessed by their protective effect...
November 30, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27901120/complete-genome-sequence-and-transcriptomic-analysis-of-a-novel-marine-strain-bacillus-weihaiensis-reveals-the-mechanism-of-brown-algae-degradation
#4
Yueming Zhu, Peng Chen, Yunjuan Bao, Yan Men, Yan Zeng, Jiangang Yang, Jibin Sun, Yuanxia Sun
A novel marine strain representing efficient degradation ability toward brown algae was isolated, identified, and assigned to Bacillus weihaiensis Alg07. The alga-associated marine bacteria promote the nutrient cycle and perform important functions in the marine ecosystem. The de novo sequencing of the B. weihaiensis Alg07 genome was carried out. Results of gene annotation and carbohydrate-active enzyme analysis showed that the strain harbored enzymes that can completely degrade alginate and laminarin, which are the specific polysaccharides of brown algae...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27895628/nearshore-pelagic-microbial-community-abundance-affects-recruitment-success-of-giant-kelp-macrocystis-pyrifera
#5
Megan M Morris, John M Haggerty, Bhavya N Papudeshi, Alejandro A Vega, Matthew S Edwards, Elizabeth A Dinsdale
Marine microbes mediate key ecological processes in kelp forest ecosystems and interact with macroalgae. Pelagic and biofilm-associated microbes interact with macroalgal propagules at multiple stages of recruitment, yet these interactions have not been described for Macrocystis pyrifera. Here we investigate the influence of microbes from coastal environments on recruitment of giant kelp, M. pyrifera. Through repeated laboratory experiments, we tested the effects of altered pelagic microbial abundance on the settlement and development of the microscopic propagules of M...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27888731/kelp-waste-extracts-combined-with-acetate-enhances-the-biofuel-characteristics-of-chlorella-sorokiniana
#6
Shiyan Zheng, Meilin He, Yangsui Sui, Temesgen Gebreluel, Shanmei Zou, Nyabuto Dorothy Kemuma, Changhai Wang
To probe the effect of kelp waste extracts (KWE) combined with acetate on biochemical composition of Chlorella sorokiniana, the cultures were performed under independent/combined treatment of KWE and acetate. The results showed that high cell density and biomass were obtained by KWE combined with acetate treatments, whose biomass productivity increased by 79.69-102.57% and 20.04-35.32% compared with 3.0gL(-1) acetate and KWE treatments respectively. The maximal neutral lipid per cell and lipid productivity were gained in KWE combined with 3...
November 16, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27885670/telomeric-localization-of-the-arabidopsis-type-heptamer-repeat-tttaggg-n-at-the-chromosome-ends-in-saccharina-japonica-phaeophyta
#7
Q F Yang, L Liu, Y Liu, Z G Zhou
Telomeres generally consist of short repeats of minisatellite DNA sequences and are useful in chromosome identification and karyotype analysis. To date, telomeres have not been characterized in the economic brown seaweed Saccharina japonica, thus its full cytogenetic research and genetic breeding potential has not been realized. Herein, the tentative sequence of telomeres in S. japonica was identified by PCR amplification with primers designed based on the Arabidopsis-type telomere sequence (TTTAGGG)n , which was chosen out of 3 possible telomeric repeat DNA sequences typically present in plants and algae...
November 25, 2016: Journal of Phycology
https://www.readbyqxmd.com/read/27878814/giant-kelp-vegetative-propagation-adventitious-holdfast-elements-rejuvenate-senescent-individuals-of-the-macrocystis-pyrifera-integrifolia-ecomorph
#8
Pedro Murúa, Dieter G Müller, David J Patiño, Renato Westermeier
Recent findings on holdfast development in the giant kelp highlighted its key importance for Macrocystis vegetative propagation. We report here for the first time the development of adventitious holdfasts from Macrocystis stipes. Swellings emerge spontaneously from different areas of the stipes, especially in senescent or creeping individuals. After being manually fastened to solid substrata, these swellings elongated into haptera, which became strongly attached after one month. Within 4 months new thalli increased in size and vitality, and developed reproductive fronds...
November 22, 2016: Journal of Phycology
https://www.readbyqxmd.com/read/27878385/the-effects-of-warming-on-the-ecophysiology-of-two-co-existing-kelp-species-with-contrasting-distributions
#9
Matthew S Hargrave, Andrew Foggo, Albert Pessarrodona, Dan A Smale
The northeast Atlantic has warmed significantly since the early 1980s, leading to shifts in species distributions and changes in the structure and functioning of communities and ecosystems. This study investigated the effects of increased temperature on two co-existing habitat-forming kelps: Laminaria digitata, a northern boreal species, and Laminaria ochroleuca, a southern Lusitanian species, to shed light on mechanisms underpinning responses of trailing and leading edge populations to warming. Kelp sporophytes collected from southwest United Kingdom were maintained under 3 treatments: ambient temperature (12 °C), +3 °C (15 °C) and +6 °C (18 °C) for 16 days...
November 23, 2016: Oecologia
https://www.readbyqxmd.com/read/27870061/re-annotation-improved-large-scale-assembly-and-establishment-of-a-catalogue-of-noncoding-loci-for-the-genome-of-the-model-brown-alga-ectocarpus
#10
Alexandre Cormier, Komlan Avia, Lieven Sterck, Thomas Derrien, Valentin Wucher, Gwendoline Andres, Misharl Monsoor, Olivier Godfroy, Agnieszka Lipinska, Marie-Mathilde Perrineau, Yves Van De Peer, Christophe Hitte, Erwan Corre, Susana M Coelho, J Mark Cock
The genome of the filamentous brown alga Ectocarpus was the first to be completely sequenced from within the brown algal group and has served as a key reference genome both for this lineage and for the stramenopiles. We present a complete structural and functional reannotation of the Ectocarpus genome. The large-scale assembly of the Ectocarpus genome was significantly improved and genome-wide gene re-annotation using extensive RNA-seq data improved the structure of 11 108 existing protein-coding genes and added 2030 new loci...
November 21, 2016: New Phytologist
https://www.readbyqxmd.com/read/27861900/abiotic-influences-on-bicarbonate-use-in-the-giant-kelp-macrocystis-pyrifera-in-the-monterey-bay
#11
Sarah Tepler Drobnitch, Kerry Nickols, Matthew Edwards
In the Monterey Bay region of Central California, the giant kelp Macrocystis pyrifera experiences broad fluctuations in wave forces, temperature, light availability, nutrient availability, and seawater carbonate chemistry, all of which may impact their productivity. In particular, current velocities and light intensity may strongly regulate the supply and demand of inorganic carbon (Ci) as substrates for photosynthesis. M. pyrifera can acquire and utilize both CO2 and bicarbonate (HCO3(-) ) as Ci substrates for photosynthesis and growth; given the variability of carbon delivery (due to current velocities and varying [DIC]) and demand (in the form of saturating irradiance) we hypothesized that the proportion of CO2 and bicarbonate utilized is not constant for M...
November 11, 2016: Journal of Phycology
https://www.readbyqxmd.com/read/27859169/nipped-in-the-bud-mesograzer-feeding-preference-contributes-to-kelp-decline
#12
John M O'Brien, Robert E Scheibling
Small invertebrate grazers can disproportionately reduce plant fitness by discriminately consuming valuable tissues, but the context and attendant consequences of this activity at higher levels of ecological organization rarely are considered. To assess the impact of a gastropod mesograzer Lacuna vincta on fecundity and potential reproductive output of the habitat-forming kelp Saccharina latissima, we measured the intensity and distribution of grazing damage on kelp blades at five sites of varying kelp density, during the annual reproductive peak (October-November) in Nova Scotia...
July 2016: Ecology
https://www.readbyqxmd.com/read/27859118/organismal-homeostasis-buffers-the-effects-of-abiotic-change-on%C3%A2-community-dynamics
#13
Giulia Ghedini, Sean D Connell
The problem of linking fine-scale processes to broad-scale patterns remains a central challenge of ecology. As rates of abiotic change intensify, there is a critical need to understand how individual responses aggregate to generate compensatory dynamics that stabilize community processes. Notably, while local and global resource enhancement (e.g., nutrient and CO2 release) can reverse dominance relationship between key species (e.g., shifts from naturally kelp-dominated to turf-dominated systems), herbivores can counter these shifts by consuming the additional productivity of competing species (e...
October 2016: Ecology
https://www.readbyqxmd.com/read/27849585/long-term-empirical-evidence-of-ocean-warming-leading-to-tropicalization-of-fish-communities-increased-herbivory-and-loss-of-kelp
#14
Adriana Vergés, Christopher Doropoulos, Hamish A Malcolm, Mathew Skye, Marina Garcia-Pizá, Ezequiel M Marzinelli, Alexandra H Campbell, Enric Ballesteros, Andrew S Hoey, Ana Vila-Concejo, Yves-Marie Bozec, Peter D Steinberg
Some of the most profound effects of climate change on ecological communities are due to alterations in species interactions rather than direct physiological effects of changing environmental conditions. Empirical evidence of historical changes in species interactions within climate-impacted communities is, however, rare and difficult to obtain. Here, we demonstrate the recent disappearance of key habitat-forming kelp forests from a warming tropical-temperate transition zone in eastern Australia. Using a 10-y video dataset encompassing a 0...
November 14, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27849580/global-patterns-of-kelp-forest-change-over-the-past-half-century
#15
Kira A Krumhansl, Daniel K Okamoto, Andrew Rassweiler, Mark Novak, John J Bolton, Kyle C Cavanaugh, Sean D Connell, Craig R Johnson, Brenda Konar, Scott D Ling, Fiorenza Micheli, Kjell M Norderhaug, Alejandro Pérez-Matus, Isabel Sousa-Pinto, Daniel C Reed, Anne K Salomon, Nick T Shears, Thomas Wernberg, Robert J Anderson, Nevell S Barrett, Alejandro H Buschmann, Mark H Carr, Jennifer E Caselle, Sandrine Derrien-Courtel, Graham J Edgar, Matt Edwards, James A Estes, Claire Goodwin, Michael C Kenner, David J Kushner, Frithjof E Moy, Julia Nunn, Robert S Steneck, Julio Vásquez, Jane Watson, Jon D Witman, Jarrett E K Byrnes
Kelp forests (Order Laminariales) form key biogenic habitats in coastal regions of temperate and Arctic seas worldwide, providing ecosystem services valued in the range of billions of dollars annually. Although local evidence suggests that kelp forests are increasingly threatened by a variety of stressors, no comprehensive global analysis of change in kelp abundances currently exists. Here, we build and analyze a global database of kelp time series spanning the past half-century to assess regional and global trends in kelp abundances...
November 14, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27826349/life-threatening-complication-of-self-made-remedy-for-controlling-high-blood-pressure-coronary-artery-vasospasm-associated-with-iatrogenic-thyrotoxicosis
#16
In Sook Kang, Wook Bum Pyun
We report the case of a middle aged woman who was previously diagnosed with hypertension. She had been drinking a kelp concentrate solution daily for her hypertension instead of taking the prescribed medicine due to her personal beliefs about the kelp solution. As a consequence, she experienced vasospastic angina complicated by myocardial infarction and cardiogenic syncope resulting from iatrogenic thyrotoxicosis. Complementary medicine is widely used by the general population. However, there is still a lack of evidence regarding their efficacy and safety...
November 2016: Korean Circulation Journal
https://www.readbyqxmd.com/read/27798078/the-leafy-seadragon-phycodurus-eques-a-flagship-species-with-low-but-structured-genetic-variability
#17
Josefin Stiller, Nerida G Wilson, Stephen Donnellan, Greg W Rouse
The leafy seadragon (Phycodurus eques, Syngnathidae), is a charismatic endemic of Australia's temperate coast. The species exhibits remarkable camouflage in its kelp and seagrass habitat. These habitats have been retreating throughout the range of the species, leading to concerns about the persistence of leafy seadragons. Despite being a popular aquarium display and a flagship for coastal conservation, little is known about leafy seadragon biology. We used seven microsatellite markers and two mitochondrial DNA fragments to investigate the population structuring and genetic diversity of 71 individuals...
October 25, 2016: Journal of Heredity
https://www.readbyqxmd.com/read/27783146/collagen-cell-carriers-seeded-with-human-urothelial-cells-for-urethral-reconstructive-surgery-first-results-in-a-xenograft-minipig-model
#18
Stefan Aufderklamm, Martin Vaegler, Alexandra Kelp, Sabine Maurer, Leon Gustafsson, Jens Mundhenk, Silke Busch, Lisa Daum, Arnulf Stenzl, Bastian Amend, Karl-Dietrich Sievert
PURPOSE: Urethral strictures are a common disease of the lower urinary tract in men. At present, the use of buccal mucosa is the method of choice for long or recurrent strictures. However, autologous tissue-engineered grafts are still under investigation for reconstructive urological surgery. The aim of this pilot study was to evaluate the use of human urothelial cells (HUC) seeded on bovine collagen type I-based cell carriers (CCC) in an animal model and to evaluate short-term outcome of the surgical procedure...
October 25, 2016: World Journal of Urology
https://www.readbyqxmd.com/read/27778012/dual-band-moir%C3%A3-metasurface-patches-for-multifunctional-biomedical-applications
#19
Zilong Wu, Glen Kelp, Maruthi Nagavalli Yogeesh, Wei Li, Kyle M McNicholas, Andrew Briggs, Bharath Bangalore Rajeeva, Deji Akinwande, Seth R Bank, Gennady Shvets, Yuebing Zheng
There has been strong interest in developing multi-band plasmonic metasurfaces for multiple optical functions on single platforms. Herein, we developed Au moiré metasurface patches (AMMP), which leverage the tunable multi-band responses of Au moiré metasurfaces and the additional field enhancements of the metal-insulator-metal configuration to achieve dual-band plasmon resonance modes in near-infrared and mid-infrared regimes with high field enhancement. Furthermore, we demonstrate the multifunctional applications of AMMP, including surface-enhanced infrared spectroscopy, optical capture and patterning of bacteria, and photothermal denaturation of proteins...
October 25, 2016: Nanoscale
https://www.readbyqxmd.com/read/27777737/marine-reserves-indirectly-affect-fine-scale-habitat-associations-but-not-overall-densities-of-small-benthic-fishes
#20
Adam N H Smith, Marti J Anderson
Many large, fishery-targeted predatory species have attained very high relative densities as a direct result of protection by no-take marine reserves. Indirect effects, via interactions with targeted species, may also occur for species that are not themselves targeted by fishing. In some temperate rocky reef ecosystems, indirect effects have caused profound changes in community structure, notably the restoration of predator-urchin-macroalgae trophic cascades. Yet, indirect effects on small benthic reef fishes remain poorly understood, perhaps because of behavioral associations with complex, refuge-providing habitats...
September 2016: Ecology and Evolution
keyword
keyword
92181
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"