Papers by Catherine M Yule
Social Science Research Network, 2022
Global Ecology and Biogeography, May 23, 2011
Food Chemistry, May 15, 2009
The methanolic fresh leaf extracts of Macaranga gigantea, Macaranga pruinosa, Macaranga tanarius ... more The methanolic fresh leaf extracts of Macaranga gigantea, Macaranga pruinosa, Macaranga tanarius and Macaranga triloba were screened for their antioxidant properties (AOP), tyrosinase inhibition and antibacterial activities. Total phenolic content (TPC), 1, 1-...
Springer eBooks, 2008
... Relatively few studies have been published in peer-reviewed journalsmost are reported in sym... more ... Relatively few studies have been published in peer-reviewed journalsmost are reported in symposia and workshops (eg Aminuddin 1992; Maltby ... A study in Peninsular Malaysia by Asyraf and Mansor (2002) recorded 130 species of weeds including noxious species such as ...
International Journal of Systematic and Evolutionary Microbiology, Dec 1, 2020
Malaysian Journal of Microbiology, Jun 1, 2015
Oxford University Press eBooks, Dec 20, 2018
Lab on a Chip, 2022
The 3D-printed iChip version made from thermoplastics or photopolymers can isolate microbial popu... more The 3D-printed iChip version made from thermoplastics or photopolymers can isolate microbial populations of a peat swamp in situ with a population profile different from that isolated via the standard in vitro Petri dish cultivation method.
Global Biogeochemical Cycles, 2022
Microbes play a critical role in plant litter decomposition and influence the fate of carbon in r... more Microbes play a critical role in plant litter decomposition and influence the fate of carbon in rivers and riparian zones. When decomposing low‐nutrient plant litter, microbes acquire nitrogen (N) and phosphorus (P) from the environment (i.e., nutrient immobilization), and this process is potentially sensitive to nutrient loading and changing climate. Nonetheless, environmental controls on immobilization are poorly understood because rates are also influenced by plant litter chemistry, which is coupled to the same environmental factors. Here we used a standardized, low‐nutrient organic matter substrate (cotton strips) to quantify nutrient immobilization at 100 paired stream and riparian sites representing 11 biomes worldwide. Immobilization rates varied by three orders of magnitude, were greater in rivers than riparian zones, and were strongly correlated to decomposition rates. In rivers, P immobilization rates were controlled by surface water phosphate concentrations, but N immobil...
Methods to Study Litter Decomposition, 2020
Aquatic Microbial Ecology, 2019
Journal of Geophysical Research: Atmospheres, 2018
Southeast Asia experiences frequent fires in fuel‐rich tropical peatlands, leading to extreme epi... more Southeast Asia experiences frequent fires in fuel‐rich tropical peatlands, leading to extreme episodes of regional haze with high concentrations of fine particulate matter (PM2.5) impacting human health. In a study published recently, the first field measurements of PM2.5 emission factors for tropical peat fires showed larger emissions than from other fuel types. Here we report even higher PM2.5 emission factors, measured at newly ignited peat fires in Malaysia, suggesting that current estimates of fine particulate emissions from peat fires may be underestimated by a factor of 3 or more. In addition, we use both field and laboratory measurements of burning peat to provide the first mechanistic explanation for the high variability in PM2.5 emission factors, demonstrating that buildup of a surface ash layer causes the emissions of PM2.5 to decrease as the peat fire progresses. This finding implies that peat fires are more hazardous (in terms of aerosol emissions) when first ignited th...
Science of The Total Environment, 2018
LIM TY, LIM YY & YULE CM. 2014. Bioactivity of leaves of Macaranga species in tropical peat swamp... more LIM TY, LIM YY & YULE CM. 2014. Bioactivity of leaves of Macaranga species in tropical peat swamp and non-peat swamp environments. Very few studies have been reported on the chemical properties of peat swamp plants compared with their non-peat swamp counterparts. In this study, the total phenolic content, antioxidant activity and antibacterial activity of fresh Macaranga gigantea, M. hosei, M. hypoleuca, M. kingii, M. pruinosa and M. triloba leaf extracts from four tropical peat swamp forests and three non-peat swamp forests were measured and compared. Total phenolic content was measured by the Folin–Ciocalteu assay. Antioxidant activity was determined using the 1,1-diphenyl-2-picrylhydrazyl free radical scavenging and ferric reducing power assays, while disc-diffusion technique was used to determine the antibacterial properties. Reversed-phasehigh-performance liquid chromatography methods were used to identify and quantify the concentrations of phenolics. Antioxidant properties of ...
Science of The Total Environment
Genome Announcements, 2018
We report here the draft genome sequences of a bacterial isolate, Dyella sp. strain C11, which wa... more We report here the draft genome sequences of a bacterial isolate, Dyella sp. strain C11, which was isolated from a Malaysian tropical peat swamp forest. The putative genes for the biogeochemical processes were annotated, and the genome was deposited in an online database.
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Papers by Catherine M Yule