Encontrados 35 documentos, a visualizar página 1 de 4
Organic geochemistry and mineralogy suggest anthropogenic impact in speleothem ...
Miller, A; Jimenez-Morillo, N; Coutinho, M; Gazquez, F; Palma, V; Sauro, F; Pereira, M; Rull, F; Toulkeridis, T; Caldeira, A T; Forti, P; Calaforra, JThe network of lava tubes is one of the most unexploited natural wonders of the Galapagos Islands. Here, we provide the first morphological, mineralogical, and biogeochemical assessment of speleothems fromvolcanic caves of the Galapagos to understand their structure, composition, and origin, as well as to identify organic molecules preserved in speleothems. Mineralogical analyses revealed that moonmilk and cora...
Bacterial communities from Trichuris spp. A contribution to deciphering the rol...
a García-Sanchez, A; Miller, A; Caldeira, A T; Cutillas, CristinaMicrobiome taxa associated with parasitic nematodes is unknown. These invertebrate parasites could act not only as reservoirs and vectors for horizontally transferred virulence factors, but could also provide a potential pool of future emerging pathogens. Trichuris trichiura and Trichuris suis are geohelminths parasitizing the caecum of primates, including humans, and pigs, respectively. The present work is a p...
Aerobiology from an Inactive Pyrite Mine: the Genome Sequence of the Airborne P...
Gonzalez-Pimentel, J; Domínguez-Moñino, I; Jurado, V; Caldeira, A T; Saiz-Jiménez, CPseudomonas sp. strain L5B5 is an antimicrobial-producing bacterium isolated from an air sample collected in a pyrite mine in Lousal, Portugal. Genomic analyses predicted genes involved in virulence factors. Here, we report the complete genome sequence of this bacterium, which consists of a circular chromosome with a length of 6,811,662 bp.
Prokaryotic communities from a lava tube cave in La Palma Island (Spain) are in...
Gonzalez-Pimentel, J; Martin-Pozas, T; Jurado, V; Miller, A; Caldeira, A T; Fernandez-Lorenzo; Sanchez-Moral, S; Saiz-Jimenez, CLava caves differ from karstic caves in their genesis and mineral composition. Subsurface microbiology of lava tube caves in Canary Islands, a volcanic archipelago in the Atlantic Ocean, is largely unknown. We have focused the investigation in a representative lava tube cave, Fuente de la Canaria Cave, in La Palma Island, Spain, which presents different types of speleothems and colored microbial mats. Four samp...
Underneath the Purple Stain
Pinheiro, C; Miller, A; Vaz, P; Caldeira, A T; Casanova, CThe Alcobacenses are one of the most important Portuguese collections of Monastic codices. During a campaign study to further advance our knowledge on this important legacy and its state of conservation, a heavily deteriorated codex (ALC.338) stood out due to the presence of purple stains on the lower margins on virtually all folios. In some of them, the purple stains are accompanied by yellow and brown patches...
Assessing aesthetic and structural deterioration in historic buildings – a cont...
Dias, L; Rosado, T; Bhattacharya, S; Candeias, A; Caldeira, A T; Mirão, JAn important part of our cultural heritage assets is built of natural stone since it has always been a material of excellence due to its inherent characteristics. Despite the physical and mechanical properties that give relatively long durability as a construction material, some characteristics are less durable, namely color or eventual surface finishes. The alteration of its aesthetic features may be followed ...
Pseudomonas sp., Strain L5B5: A Genomic and Transcriptomic Insight into an Airb...
Pimentel, J; Moñino, I; Jurado, V; Caldeira, A T; Saiz‐Jimenez, CMines, like other subterranean environments, have ecological conditions which allow the thriving of microorganisms. Prokaryotes and fungi are common inhabitants of mines, developing a metabolism suitable for growing in such inhospitable environments. The mine of Lousal, Portugal, is an interesting site for the study of microorganisms present in their galleries. Aerobiological studies resulted in the isolation o...
The Rare Actinobacterium Crossiella sp. Is a Potential Source of New Bioactive ...
Gonzalez-Pimentel, J; Moñino, I; Jurado, V; Laiz, L; Caldeira, A T; Saiz-Jimenez, CAntimicrobial resistance has become a global problem in recent decades. A gradual reduction in drug discoveries has led to the current antimicrobial resistance crisis. Caves and other subsurface environments are underexplored thus far, and they represent indispensable ecological niches that could offer new molecules of interest to medicine and biotechnology. We explored Spanish show caves to test the bioactivit...
New Red-Shifted 4-Styrylcoumarin Derivatives as Potential Fluorescent Labels fo...
Eustáquio, R; Prates Ramalho, JP; Caldeira, A T; Pereira, AImportant scientific areas, such as cellular biology, medicine, pharmacy, and environmental sciences, are dependent on very sensitive analytical techniques to track and detect biomolecules. In this work, we develop a simple, low-cost and effective synthetic strategy to produce new red-shifted 4-styrylcoumarin derivatives as promising inexpensive fluorescent labels for biomolecules. The extension of the delocali...
Green Mitigation Strategy for Cultural Heritage Using Bacterial Biocides
Caldeira, A TThe microbiota present in cultural heritage objects, made by diverse inorganic and organic materials and inserted into particular environment, represents a complex and dynamic ecosystem composed by bacteria, cyanobacteria, fungi, algae and lichens, which can induce decay by biological mechanisms. To control the microbial growth several methods are being applied such as mechanical and physical processes and chem...