Post‐Wildfire Soil Properties Changes: Insights Into Hillslope Erosion After the March 2024 Yajiang Fire

Journal of Geophysical Research Earth Surface, Год журнала: 2025, Номер 130(3)

Опубликована: Март 1, 2025

Abstract Soil property changes influence material transport from hillslopes to channels after the wildfire and may indirectly trigger debris flow initiation. This study investigates post‐fire soil evolution its role in hillslope erosion following 15 March 2024 Yajiang Fire, integrating field measurements with laboratory simulations quantify temperature‐ duration‐dependent their controls. Results demonstrate that wildfire‐driven organic matter alteration is governed predominantly by peak heating temperature not exposure duration. Post‐fire profiles are stratified into three thermal impact zones: (a) a high‐temperature zone (>600°C), characterized complete combustion; (b) water‐repellent (WR) (100–600°C), subdivided highly WR layer, an aggregate stability (AS)‐enhancement low layer; (c) unaffected (<100°C). The mobilized wind gravity, accumulate as dry ravel deposits, forming primary source of immediate flows. AS‐enhancement exhibiting improved stability, temporarily mitigates raindrop splash interrill underlying soils prior first rainfall event. However, this layer delays but does prevent deeper mobilization during subsequent intense runoff. These findings clarify thresholds controlling zonation, highlight mechanisms linking initiation, provide valuable data on processes.

Язык: Английский

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Comparative Analysis of Bioactive Compounds in Pine Resin: Headspace/GC-MS and Direct Injection/GC-MS

Türkiye Tarımsal Araştırmalar Dergisi, Год журнала: 2025, Номер 12(1), С. 63 - 71

Опубликована: Март 28, 2025

This study, the chemical composition of pine resin collected from three different locations (Kaburgediği, Karabucak and Mavisilifke) Mersin province in Mediterranean Region Türkiye was investigated using headspace/GC-MS direct injection/GC-MS techniques. A commercial essential oil used as a control sample study. The analysis focused on key volatile compounds, including α-pinene, delta-3-carene, camphene, DL-limonene (mixture D- L-form), caryophyllene. method more effective for detecting compounds with higher volatility, such which abundant (66.12% headspace vs. 53.13% injection). On other hand, provided sensitivity less caryophyllene (4.82% injection 0.67% Kaburgediği). most significant difference between methods observed detection DL-limonene, showed concentrations (3.76% compared to (1.51%). suggests that is better quantifying lower while capturing overall aroma profile, especially compounds. highlights efficiency based compound's volatility. Therefore, choosing right depends specific interest their volatility characteristics. These findings highlight unique profiles each resin, shaped by both species analytical used, implications aromatic potential pharmacological properties.

Язык: Английский

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Changes of micro-structure and micro-mechanical properties of wood cell walls due to cellulose purification treatment

Journal of Wood Chemistry and Technology, Год журнала: 2025, Номер unknown, С. 1 - 15

Опубликована: Апрель 22, 2025

Язык: Английский

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Electrophysical properties of heartwood and sapwood of Scots pine

Journal of the Indian Academy of Wood Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

Язык: Английский

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Bioactive Molecules from Myrianthus arboreus, Acer rubrum, and Picea mariana Forest Resources

Molecules, Год журнала: 2023, Номер 28(5), С. 2045 - 2045

Опубликована: Фев. 22, 2023

Forest trees are the world’s most important renewable natural resources in terms of their dominance among other biomasses and diversity molecules that they produce. tree extractives include terpenes polyphenols, widely recognized for biological activity. These found forest by-products, such as bark, buds, leaves, knots, commonly ignored forestry decisions. The present literature review focuses on vitro experimental bioactivity from phytochemicals Myrianthus arboreus, Acer rubrum, Picea mariana by-products with potential further nutraceutical, cosmeceutical, pharmaceutical development. Although these extracts function antioxidants may act signaling pathways involved diabetes, psoriasis, inflammation, skin aging, much still remains to be investigated before using them therapeutic candidates, cosmetics, or functional foods. Traditional management systems focused wood must evolve towards a holistic approach, allowing use developing new value-added products.

Язык: Английский

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Smart Packaging Based on Polylactic Acid: Effect of Antibacterial and Antioxidant Agents from Natural Extract on Physical-Mechanical Properties, Colony Reduction, and Perishable Food Shelf Life

Опубликована: Сен. 26, 2023

The changes in consumer lifestyles have raised awareness of the variety food options and packaging technologies. Active smart represents an innovative technology that serves to enhance safety quality products. Smart packaging, as a subset this technology, entails integration additives into materials, thereby facilitating preservation or extension product shelf life. This technological approach stimulates heightened demand for safer products with prolonged predominantly relies on utilization natural active substances. Therefore, combination substances has significant impact characteristics particularly polymeric blend like Polylactic acid (PLA) matrix. So, review will summarize explains how addition agents influenced properties related performance through systematic analysis, providing new insights about relationship between types physical-mechanical properties, bacterial colony reduction, applications foods such meat, fish, fruit, vegetables. Through their integration, market systems is expected bright future.

Язык: Английский

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Moisture and Temperature Profiles of Heartwood Pinus pinaster Ait. Wood Specimens during Microwave Drying

Forests, Год журнала: 2024, Номер 15(6), С. 944 - 944

Опубликована: Май 30, 2024

Microwave (MW) drying of wood has gained popularity in the field modification. The rise temperature during MW leads to increased steam pressure, enhancing permeability but potentially decreasing mechanical properties. Understanding and moisture behaviors is crucial for its industrial application drying. Therefore, this study aimed characterize small Portuguese maritime pine (Pinus pinaster Aiton.) samples support a wider use technology. effects on water uptake compressive strength parallel grain were also investigated. results indicated three distinct phases rates, with an average 0.085% removed per second. Moreover, underwent stages: initial rapid increase, period constant temperature, slight decrease until was complete. At beginning drying, temperatures below 100 °C, ranging from 126 145 °C. Specimens lower content had higher temperatures, positive correlation found between time. In contrast, negative correlations as well Additionally, operating condition parameters used enhanced impregnability by 65%, generating reduction 11% strength. It noticed that did not impact MW-dried samples’ or Finally, although clear utilized, patterns observed closely matched real-scale specimens. Thus, findings corroborate wide utilization technology mainly demonstrating possibilities structural-sized

Язык: Английский

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Coating of Hemp Fibres with Hydrophobic Compounds Extracted from Pine Bark

Fibers, Год журнала: 2024, Номер 12(11), С. 96 - 96

Опубликована: Ноя. 7, 2024

Applying coatings of paraffins and other synthetic waxes is a common approach to impart hydrophobic properties fibres thus control their surface characteristics. Replacing these fossil-based products with alternatives derived from renewable resources can contribute humankind’s transition sustainable bioeconomy. This study presents the coating hemp extracted pine bark as an exemplar application. Two bio-based emulsifiers were used prepare wax emulsions suitable for dry blending process. The on characterised, quantified, visualised using combination spectroscopic microscopic techniques. Confocal fluorescence microscopy was excellent tool investigate spatial distribution fibre surfaces. While successful deposition demonstrated all tested formulations, homogeneity varied different emulsifiers. Compounding polyester resulted in substantial improvement mechanical behaviour. However, presence did not lead significant change compared controls uncoated fibres. Optimising composite chemistry or adjusting processing conditions might improve compatibility matrix material, resulting enhanced performance.

Язык: Английский

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Relation between morphology and native climate in the resistance of different Pinus pinaster populations to pitch canker disease caused by Fusarium circinatum

Forest Ecology and Management, Год журнала: 2024, Номер 561, С. 121909 - 121909

Опубликована: Апрель 17, 2024

Maritime pine (Pinus pinaster) is a forest species of great ecological and economic interest in the European Union, especially Iberian Peninsula. Currently, one main threats this has to face spread quarantine pathogenic fungus (A2 list) Fusarium circinatum, causal agent pitch canker disease. Since strategies for control disease use resistant clones, it necessary carry out extensive work on susceptibility analysis several P. pinaster populations against F. circinatum. To end, we have studied 35 located throughout natural distribution range. After inoculation with circinatum spores, all was studied, correlating their morphological traits (height stem diameter) relating climate origin. The results obtained reported significant differences among both disease, negative correlation between height susceptibility. With respect origin, continental resistance established. Therefore, indicated characteristics could be selected establishment programs breeding forests.

Язык: Английский

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Comparative Stem Transcriptome Analysis Reveals Pathways Associated with Drought Tolerance in Maritime Pine Grafts

International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(18), С. 9926 - 9926

Опубликована: Сен. 14, 2024

The maritime pine (Pinus pinaster Ait.) is a highly valuable Mediterranean conifer. However, recurrent drought events threaten its propagation and conservation. P. populations exhibit remarkable differences in tolerance. To explore these differences, we analyzed stem transcriptional profiles of grafts combining genotypes with contrasting responses under well-watered water-stress regimes. Our analysis underscored that tolerance mainly associated constitutively expressed genes, which vary based on genotype provenance. identified key genes encoding proteins involved water stress response, abscisic acid signaling, growth control including PHD chromatin regulator, histone deubiquitinase, the ABI5-binding protein 3, transcription factors from Myb-related, DOF NAC LHY families. Additionally, drought-tolerant rootstock could enhance sensitive scions by regulating accumulation transcripts carbon mobilization, osmolyte biosynthesis, flavonoid terpenoid metabolism, reactive oxygen species scavenging. These included galactinol synthase, CBL-interacting serine/threonine kinase 5, BEL1-like homeodomain protein, dihydroflavonol 4-reductase, 1-deoxy-D-xylulose-5-phosphate. results revealed several hub help us to understand molecular physiological response conifers. Based all above, grafting selected rootstocks promising method for propagating elite recalcitrant conifer species, such as pinaster.

Язык: Английский

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