Filamentous cyanobacteria preserved in masses of fungal hyphae from the Triassic of Antarctica.

abstract：:We have previously observed that methane supplied to lake sediment microbial communities as a substrate not only causes a response by bona fide methanotrophic bacteria, but also by non-methane-oxidizing bacteria, especially by members of the family Methylophilaceae. This result suggested that methane oxidation in this...

journal_title：PeerJ

authors： Hernandez ME,Beck DA,Lidstrom ME,Chistoserdova L

更新日期：2015-02-24 00:00:00

abstract：:A fundamental question in ecology is how the success of a taxon changes through time and what drives this change. This question is commonly approached using trajectories averaged over a group of taxa. Using results from probability theory, we show analytically and using examples that averaged trajectories will be more...

journal_title：PeerJ

authors： Hohmann N,Jarochowska E

更新日期：2019-11-06 00:00:00

abstract：:In the Western honey bee, Apis mellifera, queens and workers have different longevity although they share the same genome. Queens consume royal jelly (RJ) as the main food throughout their life, including as adults, but workers only eat worker jelly when they are larvae less than 3 days old. In order to explore the ef...

journal_title：PeerJ

authors： Yang W,Tian Y,Han M,Miao X

更新日期：2017-03-28 00:00:00

abstract：:We often expect that investigations of the patterns, causes, and consequences of among-individual variation in a trait of interest will reveal how selective pressures or ecological conditions influence that trait. However, many endocrine traits, such as concentrations of glucocorticoid (GC) hormones, exhibit adaptive ...

journal_title：PeerJ

authors： Schoenemann KL,Bonier F

更新日期：2018-02-21 00:00:00

abstract：:Limestone karsts of Southeast Asia can harbor high levels of endemism, but are highly fragmented, increasingly threatened, and their biodiversity is often poorly studied. This is true of the Padawan Limestone Area of Sarawak, Malaysia, home to the endemic Artocarpus annulatus, the closest known wild relative of two im...

journal_title：PeerJ

authors： Dickinson L,Noble H,Gardner E,Puad ASA,Zakaria WNFW,Zerega NJC

更新日期：2020-09-21 00:00:00

abstract：BACKGROUND:As one of the highest forest ecosystems in the world, Polylepis forests are recognized both as center of endemism and diversity along the Andes and as an ecosystem under serious threat from habitat loss, fragmentation, and climate change due to human activities. Effective conservation efforts are limited, in...

journal_title：PeerJ

authors： Sevillano-Ríos CS,Rodewald AD

更新日期：2017-04-27 00:00:00

abstract：:The objective of this study was to quantify consumption of clothianidin-treated corn seed by birds following standard planting practices. Based on post-planting seed counts on 21 fields in southwestern Ontario, Canada, between 29 and 813 seeds/ha (mean of 224 ± 167 (SD)) were estimated to remain on the soil surface im...

journal_title：PeerJ

authors： McGee S,Whitfield-Aslund M,Duca D,Kopysh N,Dan T,Knopper L,Brewer L

更新日期：2018-11-07 00:00:00

abstract：:The natural beauty of coral reefs attracts millions of tourists worldwide resulting in substantial revenues for the adjoining economies. Although their visual appearance is a pivotal factor attracting humans to coral reefs current monitoring protocols exclusively target biogeochemical parameters, neglecting changes in...

journal_title：PeerJ

authors： Haas AF,Guibert M,Foerschner A,Co T,Calhoun S,George E,Hatay M,Dinsdale E,Sandin SA,Smith JE,Vermeij MJ,Felts B,Dustan P,Salamon P,Rohwer F

更新日期：2015-11-10 00:00:00

abstract：Background:In the absence of highly effective antiviral therapies against SARS-CoV-2, it is crucial to counter the known pathophysiological causes of severe COVID-19. Evaluating the efficacy existing drugs may expedite the development of such therapeutics. Severe COVID-19 is largely the result of a dysregulated immune ...

journal_title：PeerJ

authors： Kaye AG,Siegel R

更新日期：2020-11-02 00:00:00

abstract：:Ocean acidification (OA) is one of the most significant threats to marine life, and is predicted to drive important changes in marine communities. Although OA impacts will be the sum of direct effects mediated by alterations of physiological rates and indirect effects mediated by shifts in species interactions and bio...

journal_title：PeerJ

authors： Lim EG,Harley CDG

更新日期：2018-07-31 00:00:00

abstract：:In this study, we demonstrated the successful transformation of two pea (Pisum sativum L.) cultivars using Agrobacterium rhizogenes, whereby transgenic roots in the resulting composite plants showed expression of the gene encoding the green fluorescent protein. Subsequent to infection with A. rhizogenes, approximately...

journal_title：PeerJ

authors： Leppyanen IV,Kirienko AN,Dolgikh EA

更新日期：2019-03-06 00:00:00

abstract：:The purpose of the study was to investigate the relationship between different exercise modes and visuospatial working memory in healthy older adults. A cross-sectional design was adopted. A total of 111 healthy older adults were enrolled in the study. They were classified by the exercise-related questionnaire to be i...

journal_title：PeerJ

authors： Guo W,Wang B,Lu Y,Zhu Q,Shi Z,Ren J

更新日期：2016-07-20 00:00:00

abstract：BACKGROUND:Digital medicine and smartphone-enabled health technologies provide a novel source of human health and human biology data. However, in part due to its intricacies, few methods have been established to analyze and interpret data in this domain. We previously conducted a six-month interventional trial examinin...

journal_title：PeerJ

authors： Gollamudi SS,Topol EJ,Wineinger NE

更新日期：2016-08-02 00:00:00

abstract：:Beta-diversity, defined as spatial replacement in species composition, is crucial to the understanding of how local communities assemble. These changes can be driven by environmental or geographic factors (such as geographic distance), or a combination of the two. Spiders have been shown to be good indicators of envir...

journal_title：PeerJ

authors： Rodriguez-Artigas SM,Ballester R,Corronca JA

更新日期：2016-04-21 00:00:00

abstract：:Background. Low use of maternal healthcare services is one of the reasons why maternal mortality is still considerably high among adolescents mothers in India. To increase the utilization of these services, it is necessary to identify factors that affect service utilization. To our knowledge, no national level study i...

journal_title：PeerJ

authors： Singh A,Kumar A,Pranjali P

更新日期：2014-11-04 00:00:00

abstract：:Neurons are embedded in an extracellular matrix (ECM), which functions both as a scaffold and as a regulator of neuronal function. The ECM is in turn dynamically altered through the action of serine proteases, which break down its constituents. This pathway has been implicated in the regulation of synaptic plasticity ...

journal_title：PeerJ

authors： Van De Vijver S,Missault S,Van Soom J,Van Der Veken P,Augustyns K,Joossens J,Dedeurwaerdere S,Giugliano M

更新日期：2019-04-23 00:00:00

abstract：Background:BRCA1 and BRCA2 genes are currently proven to be closely related to high lifetime risks of breast cancer. To date, the closely related genes to BRCA1/2 mutations in breast cancer remains to be fully elucidated. This study aims to identify the gene expression profiles and interaction networks influenced by BR...

journal_title：PeerJ

authors： Li Y,Zhou X,Liu J,Yin Y,Yuan X,Yang R,Wang Q,Ji J,He Q

更新日期：2020-01-21 00:00:00

abstract：:Antibiotic resistance in our pathogens is medicine's climate change: caused by human activity, and resulting in more extreme outcomes. Resistance emerges in microbial populations when antibiotics act on phenotypic variance within the population. This can arise from either genotypic diversity (resulting from a mutation...

journal_title：PeerJ

authors： Kurenbach B,Hill AM,Godsoe W,van Hamelsveld S,Heinemann JA

更新日期：2018-10-12 00:00:00

abstract：Background:The functional significance of ADAMs family members in the immune infiltration of pancreatic adenocarcinoma (PAAD) awaits elucidation. Methods:ADAMs family members with significant expression were identified among differentially expressed genes of PAAD based on The Cancer Genome Atlas (TCGA) database follow...

journal_title：PeerJ

authors： Qi B,Liu H,Dong Y,Shi X,Zhou Q,Zeng F,Bao N,Li Q,Yuan Y,Yao L,Xia S

更新日期：2020-09-30 00:00:00

abstract：:In this study, silver nanoparticles (NP) were synthesized by two methods: using an aqueous extract of Mentha spicata leaves and using citrate ions as stabilizing agent, and the cytotoxicity and anticancer activity of both NP were evaluated in vitro. The particles synthesized with the aqueous extract were spherical wit...

journal_title：PeerJ

authors： Torres-Martínez Y,Arredondo-Espinoza E,Puente C,González-Santiago O,Pineda-Aguilar N,Balderas-Rentería I,López I,Ramírez-Cabrera MA

更新日期：2019-12-09 00:00:00

abstract：:Amazonian bamboo forests dominated by large woody bamboo plants in the genus Guadua cover approximately 180,000 km2 and represent a key resource for many organisms. In southwestern Amazonia, native bamboo forests differ in structure, biodiversity, and growth dynamics from other forest types in the region. However, wit...

journal_title：PeerJ

authors： Jacobs JM,von May R,Kavanaugh DH,Connor EF

更新日期：2018-07-03 00:00:00

abstract：:Background. Massively parallel sequencing technology is being used to sequence highly diverse populations of DNA such as that derived from heterogeneous cell mixtures containing both wild-type and disease-related states. At the core of such molecule tagging techniques is the tagging and identification of sequence read...

journal_title：PeerJ

authors： Andrews TD,Jeelall Y,Talaulikar D,Goodnow CC,Field MA

更新日期：2016-05-24 00:00:00

abstract：BACKGROUND:Sturnira is one of the most species-rich genera in the Neotropics, and it is found from Mexico and the Lesser Antilles to Argentina. This genus forms a well-supported monophyletic clade with at least twenty-one recognized species, as well as several others under taxonomic review. Sturnira parvidens is a wide...

journal_title：PeerJ

authors： Gutiérrez EG,Hernández Canchola G,León Paniagua LS,Martínez Méndez N,Ortega J

更新日期：2017-05-24 00:00:00

abstract：:Diffuse sources of pollution like agricultural or urban runoff are important factors in determining the quality of surface waters, although they are more difficult to monitor than point sources. The objective of our study was to verify assumptions that the inflow from agricultural nutrient sources is higher than from ...

journal_title：PeerJ

authors： Matej-Lukowicz K,Wojciechowska E,Nawrot N,Dzierzbicka-Głowacka LA

更新日期：2020-02-06 00:00:00

abstract：Aims:Periodontitis and psoriatic disease, including psoriasis (PS) and psoriatic arthritis (PsA), share the common risk factors and co-morbidities. However, the risk of periodontitis in patients with psoriatic disease still needs further investigation. This study was a nationwide population-based retrospective cohort s...

journal_title：PeerJ

authors： Su NY,Huang JY,Hu CJ,Yu HC,Chang YC

更新日期：2017-11-16 00:00:00

abstract：Background:The fecal microbiota from obese individuals can induce obesity in animal models. In addition, studies in humans, animal models and dogs have revealed that the fecal microbiota of subjects with obesity is different from that of lean subjects and changes after weight loss. However, the impact of weight loss on...

journal_title：PeerJ

authors： Bermudez Sanchez S,Pilla R,Sarawichitr B,Gramenzi A,Marsilio F,Steiner JM,Lidbury JA,Woods GRT,German AJ,Suchodolski JS

更新日期：2020-10-05 00:00:00

abstract：:We created an easy-to-use device for operant licking experiments and another device that records environmental variables. Both devices use the Raspberry Pi computer to obtain data from multiple input devices (e.g., radio frequency identification tag readers, touch and motion sensors, environmental sensors) and activat...

journal_title：PeerJ

authors： Longley M,Willis EL,Tay CX,Chen H

更新日期：2017-02-14 00:00:00

abstract：:Seabed mapping can quantify the extent of benthic habitats that comprise marine ecosystems, and assess the impact of fisheries on an ecosystem. In this study, the distribution of seabed habitats in a proposed no-take Marine Reserve along the northeast coast of Great Barrier Island, New Zealand, was mapped using underw...

journal_title：PeerJ

authors： Lee ST,Kelly M,Langlois TJ,Costello MJ

更新日期：2015-12-10 00:00:00

abstract：:Local ancestry estimation infers the regional ancestral origin of chromosomal segments in admixed populations using reference populations and a variety of statistical models. Integrating local ancestry into complex trait genetics has the potential to increase detection of genetic associations and improve genetic predi...

journal_title：PeerJ

authors： Schubert R,Andaleon A,Wheeler HE

更新日期：2020-10-02 00:00:00

abstract：:Loss of biodiversity caused by impact of elephants (Loxodonta africana) on African woodlands may require a management response, but any action should be based on an understanding of why elephants choose to utilise trees destructively. Comprehension of elephant feeding behaviour requires consideration of the relative v...

journal_title：PeerJ

authors： Clegg BW,O'Connor TG

更新日期：2017-06-20 00:00:00