Results 21 to 30 of about 5,644,306 (315)

Stable Isotope Analysis Reveals That Agricultural Habitat Provides an Important Dietary Component for Nonbreeding Dunlin

Avian Conservation and Ecology, 2005
Although shorebirds spending the winter in temperate areas frequently use estuarine and supratidal (upland) feeding habitats, the relative contribution of each habitat to individual diets has not been directly quantified.
Lesley Joan Evans Ogden, Keith A. Hobson, David B. Lank, Shabtai Bittman   +3 more
doaj   +1 more source

High Field In vivo13C Magnetic Resonance Spectroscopy of Brain by Random Radiofrequency Heteronuclear Decoupling and Data Undersampling

Frontiers in Physics, 2017
In vivo13C magnetic resonance spectroscopy (MRS) is a unique and effective tool for studying dynamic human brain metabolism and the cycling of neurotransmitters.
Ningzhi Li, Shizhe Li, Jun Shen
doaj   +1 more source

Reconstructing the historical wintering destinations of seabirds using stable isotope analyses of museum specimens [PDF]

Royal Society Open Science
Stable isotope analyses of museum specimens provide an opportunity to examine long-term changes in avian migration strategies. Here, we determined stable isotopes of carbon (δ13C) and nitrogen (δ15N) in body feathers (reflecting diet during the non ...
William F. Mills, Juliette Waterman, Richard A. Phillips, Gayatri Ramakrishnan, Ramandeep Nijjar, Andrés E. Ibañez, Rona A. R. McGill, Lara M. Morales, Diego Montalti, Stuart Black   +9 more
doaj   +1 more source

Análise isotópica (δ13C) e legalidade em suco e polpa de caju Isotope analysiS (δ13C) and legality in cashew juice and pulp

Brazilian Journal of Food Technology, 2011
Os objetivos deste trabalho foram utilizar o método de análise isotópica para quantificar o carbono do ciclo fotossintético C3 em suco reconstituído e polpa de caju comerciais e mensurar o limite de legalidade, baseado na legislação brasileira, para ...
Ricardo Figueira, Andressa Milene Parente Nogueira, Waldemar Gastoni Venturini Filho, Carlos Ducatti, Martha Maria Mischan   +4 more
doaj   +1 more source

Isotopic carbon turnover in pig hoof and rib

Acta Scientiarum: Animal Sciences, 2021
The objective of this study was to evaluate the behavior of carbon incorporation and turnover in hoof and ribs of pigs at different periods of development in the search for tissues that reflect longer the former diet.
Regina Maria Nascimento Augusto Blaitt, Vivian Lo Tierzo, Juliana Célia Denadai, Cibele Regina de Souza Kruliski, Carlos Ducatti, Dirlei Antonio Berto, Maria Márcia Pereira Sartori   +6 more
doaj   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Rastreabilidade de subprodutos de origem animal em dietas com levedura e trigo para frangos Traceability of animal byproducts in diets containing yeast and wheat meal for broilers

Pesquisa Agropecuária Brasileira, 2008
O objetivo deste trabalho foi rastrear a inclussão de farinhas de origem animal em rações para frango de corte com ou sem levedura de cana-de-açúcar e farelo de trigo, por meio da análise do músculo peitoral das aves pelas técnicas dos isótopos estáveis ...
Rosana Gottmann, Antonio Celso Pezzato, Carlos Ducatti, Juliana Célia Denadai, Cleusa Móri, Mariela Akie Okino Mituo, José Roberto Sartori   +6 more
doaj   +1 more source

Transformation and fate of microphytobenthos carbon in subtropical, intertidal sediments: potential for long-term carbon retention revealed by ¹³C-labeling [PDF]

Biogeosciences, 2014
Microphytobenthos (MPB) are ubiquitous in coastal sediments, but the fate of their production (carbon biomass) is poorly defined. The processing and fate of MPB-derived carbon in subtropical intertidal sediments was investigated through in situ labeling ...
J. M. Oakes, B. D. Eyre
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source