Results 61 to 70 of about 3,683,011 (357)

Climate-driven declines in arthropod abundance restructure a rainforest food web

Proceedings of the National Academy of Sciences of the United States of America, 2018
Significance Arthropods, invertebrates including insects that have external skeletons, are declining at an alarming rate. While the tropics harbor the majority of arthropod species, little is known about trends in their abundance.
B. Lister, Andrés García
semanticscholar   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

Ion-retarding lens improves the abundance sensitivity of tandem mass spectrometers [PDF]

, 1969
Ion-retarding lens which increases the abundance sensitivity of tandem magnetic-analyzer mass spectrometers measures isotopes of low abundance in mass positions adjacent to isotopes of high abundance.
Kaiser, K. A., Stevens, C. M.
core   +1 more source

The oxygen abundance deficiency in irregular galaxies [PDF]

, 2000
The observed oxygen abundances in a number of irregular galaxies have been compared with predictions of the closed-box model of chemical and photometric evolution of galaxies. Oxygen is found to be deficient with respect to the predicted abundances. This
Ferrini, F., Pilyugin, L. S.
core   +2 more sources

Spatial Relation of Bumblebees (Hymenoptera-Apidae) with Host-Plant and their Conservation Issues: An Outlook from Urban Ecosystem of Kathmandu Valley, Nepal

European Journal of Ecology, 2019
Ecology and conservation status of bumblebee species remains poorly understood, especially in rapidly degrading urban ecosystems, which is important considering the role of bumblebees in the pollinations. We collected more than 200 bumblebee (Bombus spp.)
Daya Ram Bhusal, Kishor Chandra Ghimire, Sabina Dulal, Pratikshya Baniya, Sudeep Thakuri   +4 more
doaj   +1 more source

Wild Pollinators Enhance Fruit Set of Crops Regardless of Honey Bee Abundance

Science, 2013
Honeybees Can't Do It Alone The majority of food crops require pollination to set fruit with the honeybee providing a pollination workhorse, with both feral and managed populations an integral component of crop management (see the Perspective by ...
L. Garibaldi, I. Steffan‐Dewenter, R. Winfree, M. Aizen, R. Bommarco, S. Cunningham, C. Kremen, L. Carvalheiro, L. Harder, O. Afik, I. Bartomeus, Faye E Benjamin, V. Boreux, Daniel P. Cariveau, N. Chacoff, Jan‐Hendrik Dudenhöffer, B. Freitas, J. Ghazoul, Sarah S. Greenleaf, J. Hipólito, A. Holzschuh, B. Howlett, R. Isaacs, S. Javorek, C. Kennedy, Kristin Krewenka, S. Krishnan, Y. Mandelik, M. Mayfield, Iris Motzke, T. Munyuli, B. Nault, Mark Otieno, Jessica D. Petersen, Gideon Pisanty, S. Potts, Romina Rader, T. Ricketts, M. Rundlöf, C. Seymour, Christof Schüepp, H. Szentgyörgyi, Hisatomo Taki, T. Tscharntke, C. Vergara, B. Viana, T. Wanger, C. Westphal, N. Williams, A. Klein   +49 more
semanticscholar   +1 more source

Hematopoietic (stem) cells—The elixir of life?

FEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo, Jonah Anderson, Emilie Dinh Vedrenne, Noël Yeh Martín, Jette Lengefeld   +4 more
wiley   +1 more source

The abundance of lensing protoclusters

, 2008
Weak gravitational lensing provides a potentially powerful method for the detection of clusters. In addition to cluster candidates, a large number of objects with possibly no optical or X-ray component have been detected in shear-selected samples.
Anson D'Aloisio, Bahcall, Barkana, Bond, Brainerd, Casas-Miranda, Cen, Cooray, Cuesta, Dahle, Dahle, Eke, Eke, Erben, Fan, Haiman, Hamana, Hennawi, Henry, Holder, Kaiser, Lacey, Lilje, Majumdar, Mantz, Maturi, Maturi, McQuinn, Miralles, Navarro, Navarro, Navarro, Nord, Pace, Prada, Press, Priyamvada Natarajan, Reblinsky, Reiprich, Rowley, Schirmer, Schirmer, Schneider, Seitz, Seljak, Sheth, Sheth, Steven R. Furlanetto, Takada, Umetsu, Viana, von der Linden, Weinberg, White, White   +54 more
core   +1 more source

¹³C NMR metabolomics: applications at natural abundance. [PDF]

, 2014
(13)C NMR has many advantages for a metabolomics study, including a large spectral dispersion, narrow singlets at natural abundance, and a direct measure of the backbone structures of metabolites.
Clendinen, Chaevien, Edison, Arthur, Hahn, Daniel, Lee-McMullen, Brittany, Stupp, Gregory, Vandenborne, Krista, Walter, Glenn, Williams, Caroline   +7 more
core   +3 more sources

Horizontal distribution of invertebrate larvae around the oceanic island of Gran Canaria: the effect of mesoscale variability

Scientia Marina, 2009
In October 1991, the horizontal distribution of invertebrate larvae was studied in the waters surrounding the island of Gran Canaria (Canary Islands).
José María Landeira, Fernando Lozano-Soldevilla, Santiago Hernández-León, Eric Desmond Barton   +3 more
doaj   +1 more source