Composite materials with different contents of silicon-modified pineapple leaf fiber (PALF), calcined oyster shell powder (OSP), and poly(butylene succinate) (PBS) were successfully prepared. Moreover, the flexural performance of the composite materials containing calcined oxazoline (OSP) was obviously enhanced. The addition of silicon-modified PALF contributed to the improvement of the material's thermal stability and affected its water absorption performance. Significant degradation differences were observed in PALF composite materials modified with glycidoxypropyl trimethoxysilane (Glymo) and PBS when adding calcined OSP. Formulations containing calcined OSP and epoxy-type silicon-modified PALF showed better adhesion to the PBS substrate, thereby exhibiting good flexural performance. The flexural strength of the formulation increased by 47% compared to pure PBS. This research accentuates the differences between epoxy-type silicon-modified PALF and PBS when integrated with calcined OSP. Biodegradation experiments demonstrated a notable 38.32% degradation after 105 days of the soil burial period. Furthermore, the study investigated the potential for manufacturing products, including tableware, storage boxes, and bowls, using injection molding techniques.

In this study, novel block copolymers consisting of poly(ethylene succinate) (PES) and poly(amino acid)s were synthesized, and their thermal and mechanical properties and biodegradability characteristics were investigated. Various types of poly(amino acid) units were successfully introduced using N-phenyloxycarbonyl amino acids (NPCs). The reactions between the terminally aminated PES and the NPCs were conducted by heating in N,N-dimethylacetamide at 65 degrees C. Structural analyses of the obtained polymers confirmed that the reaction with the NPCs proceeded from both ends of the terminally aminated PES. The results of material property measurements demonstrated that the melting point of the block copolymer containing poly(alanine) units increased beyond 200 degrees C while that of the original PES was similar to 100 degrees C. Additionally, its strain at break increased similar to 80-fold compared to that of PES with a similar molecular weight. The results of biodegradability tests using a soil suspension as an inoculum indicated that some of the block copolymers underwent biodegradation, and a correlation was observed between the biodegradability and the type and feed amount of NPC. Therefore, it was proposed that the degree, rate, and onset time of biodegradation could be controlled by altering the type and amount of incorporated poly(amino acid) units. This research may contribute to the optimal and facile synthesis of polyester-b-poly(amino acid) copolymers and to the expansion of the range of available biodegradable materials.

明确不同野火数据产品的一致性与不确定性是开展产品分析应用的前提与基础。FireCCI51和MOSEV是国际上广泛使用的两套野火数据产品，泛北极多年冻土区是全球野火发生的集中区与重要碳库，分析该区野火数据产品的一致性可对未来提升野火产品的数据精度、降低泛北极碳通量估算等具有重要意义。本研究运用空间分析方法，从燃烧面积与燃烧区空间位置等方面，识别了FireCCI51和MOSEV两种数据产品在泛北极多年冻土区的一致性，进而分析了两者一致区与不一致区的地理环境特征。结果表明：(1)2001～2019年FireCCI51产品的燃烧面积均大于MOSEV，且两者燃烧面积的百分比差异在7%～60%无规律波动；(2)两种产品识别的燃烧区的空间分布一致性介于27.68%～47.14%，一致区主要分布在燃烧区集中分布的地区，例如加拿大中部地区、俄罗斯中、东西伯利亚地区及其南部延伸的大兴安岭地区，不一致区除了分布在这些地区之外，还在俄罗斯南部和西西伯利亚地区分布较多；(3)高程、气候类型和植被类型均对两套数据产品的一致区分布造成一定影响。在较低海拔和常湿冷温气候地区两种产品的一致区面积占比较多，在相对较高海拔...

明确不同野火数据产品的一致性与不确定性是开展产品分析应用的前提与基础。FireCCI51和MOSEV是国际上广泛使用的两套野火数据产品，泛北极多年冻土区是全球野火发生的集中区与重要碳库，分析该区野火数据产品的一致性可对未来提升野火产品的数据精度、降低泛北极碳通量估算等具有重要意义。本研究运用空间分析方法，从燃烧面积与燃烧区空间位置等方面，识别了FireCCI51和MOSEV两种数据产品在泛北极多年冻土区的一致性，进而分析了两者一致区与不一致区的地理环境特征。结果表明：(1)2001～2019年FireCCI51产品的燃烧面积均大于MOSEV，且两者燃烧面积的百分比差异在7%～60%无规律波动；(2)两种产品识别的燃烧区的空间分布一致性介于27.68%～47.14%，一致区主要分布在燃烧区集中分布的地区，例如加拿大中部地区、俄罗斯中、东西伯利亚地区及其南部延伸的大兴安岭地区，不一致区除了分布在这些地区之外，还在俄罗斯南部和西西伯利亚地区分布较多；(3)高程、气候类型和植被类型均对两套数据产品的一致区分布造成一定影响。在较低海拔和常湿冷温气候地区两种产品的一致区面积占比较多，在相对较高海拔...

明确不同野火数据产品的一致性与不确定性是开展产品分析应用的前提与基础。FireCCI51和MOSEV是国际上广泛使用的两套野火数据产品，泛北极多年冻土区是全球野火发生的集中区与重要碳库，分析该区野火数据产品的一致性可对未来提升野火产品的数据精度、降低泛北极碳通量估算等具有重要意义。本研究运用空间分析方法，从燃烧面积与燃烧区空间位置等方面，识别了FireCCI51和MOSEV两种数据产品在泛北极多年冻土区的一致性，进而分析了两者一致区与不一致区的地理环境特征。结果表明：(1)2001～2019年FireCCI51产品的燃烧面积均大于MOSEV，且两者燃烧面积的百分比差异在7%～60%无规律波动；(2)两种产品识别的燃烧区的空间分布一致性介于27.68%～47.14%，一致区主要分布在燃烧区集中分布的地区，例如加拿大中部地区、俄罗斯中、东西伯利亚地区及其南部延伸的大兴安岭地区，不一致区除了分布在这些地区之外，还在俄罗斯南部和西西伯利亚地区分布较多；(3)高程、气候类型和植被类型均对两套数据产品的一致区分布造成一定影响。在较低海拔和常湿冷温气候地区两种产品的一致区面积占比较多，在相对较高海拔...

明确不同野火数据产品的一致性与不确定性是开展产品分析应用的前提与基础。FireCCI51和MOSEV是国际上广泛使用的两套野火数据产品，泛北极多年冻土区是全球野火发生的集中区与重要碳库，分析该区野火数据产品的一致性可对未来提升野火产品的数据精度、降低泛北极碳通量估算等具有重要意义。本研究运用空间分析方法，从燃烧面积与燃烧区空间位置等方面，识别了FireCCI51和MOSEV两种数据产品在泛北极多年冻土区的一致性，进而分析了两者一致区与不一致区的地理环境特征。结果表明：(1)2001～2019年FireCCI51产品的燃烧面积均大于MOSEV，且两者燃烧面积的百分比差异在7%～60%无规律波动；(2)两种产品识别的燃烧区的空间分布一致性介于27.68%～47.14%，一致区主要分布在燃烧区集中分布的地区，例如加拿大中部地区、俄罗斯中、东西伯利亚地区及其南部延伸的大兴安岭地区，不一致区除了分布在这些地区之外，还在俄罗斯南部和西西伯利亚地区分布较多；(3)高程、气候类型和植被类型均对两套数据产品的一致区分布造成一定影响。在较低海拔和常湿冷温气候地区两种产品的一致区面积占比较多，在相对较高海拔...

明确不同野火数据产品的一致性与不确定性是开展产品分析应用的前提与基础。FireCCI51和MOSEV是国际上广泛使用的两套野火数据产品，泛北极多年冻土区是全球野火发生的集中区与重要碳库，分析该区野火数据产品的一致性可对未来提升野火产品的数据精度、降低泛北极碳通量估算等具有重要意义。本研究运用空间分析方法，从燃烧面积与燃烧区空间位置等方面，识别了FireCCI51和MOSEV两种数据产品在泛北极多年冻土区的一致性，进而分析了两者一致区与不一致区的地理环境特征。结果表明：(1)2001～2019年FireCCI51产品的燃烧面积均大于MOSEV，且两者燃烧面积的百分比差异在7%～60%无规律波动；(2)两种产品识别的燃烧区的空间分布一致性介于27.68%～47.14%，一致区主要分布在燃烧区集中分布的地区，例如加拿大中部地区、俄罗斯中、东西伯利亚地区及其南部延伸的大兴安岭地区，不一致区除了分布在这些地区之外，还在俄罗斯南部和西西伯利亚地区分布较多；(3)高程、气候类型和植被类型均对两套数据产品的一致区分布造成一定影响。在较低海拔和常湿冷温气候地区两种产品的一致区面积占比较多，在相对较高海拔...

(1) Background: Plastic contamination is on the rise, despite ongoing research focused on alternatives such as bioplastics. However, most bioplastics require specific conditions to biodegrade. A promising alternative involves using microorganisms isolated from landfill soils that have demonstrated the ability to degrade plastic materials. (2) Methods: Soil samples were collected, and bacteria were isolated, characterized, and molecularly identified. Their degradative capacity was evaluated using the zone of clearing method, while their qualitative and structural degradative activity was assessed in a liquid medium on poly(butylene succinate) (PBS) films prepared by the cast method. (3) Results: Three strains-Bacillus cereus CHU4R, Acinetobacter baumannii YUCAN, and Pseudomonas otitidis YUC44-were selected. These strains exhibited the ability to cause severe damage to the microscopic surface of the films, attack the ester bonds within the PBS structure, and degrade lower-weight PBS molecules during the process. (4) Conclusions: this study represents the first report of strains isolated in Yucat & aacute;n with plastic degradation activity. The microorganisms demonstrated the capacity to degrade PBS films by causing surface and structural damage at the molecular level. These findings suggest that the strains could be applied as an alternative in plastic biodegradation.

For maintenance and water saving reasons artificial or semi-artificial (hybrid) turfs have worldwide replaced natural turfs in many football-, soccer- and hockey stadiums. For obvious sustainability reasons the polymers which replace or reinforce the natural grass should be degradable, but still maintain specific mechanical properties over a certain period of time. This study intends to design and validate a poly(butylene succinate) (PBS) which fulfils these requirements. We investigated the dependency of PBS hydrolysis on molecular mass and temperature in order to develop a kinetic model for abiotic hydrolysis, which is the limiting step in PBS biodegradation. The hydrolysis rates were found to be temperature dependent according to the Arrhenius relationship k = A * exp(- EA R*T). A molecular mass dependency of the pre-exponential factor A was established and could befitted well by a linear equation without intercept for higher molecular weights. A polynomial approach led to a better fit for the whole molecular weight range. Both models have been validated on a degradation experiment in soil and were able to predict the molecular mass degradation within the typical standard deviations by size exclusion chromatography. Furthermore, we used the models to simulate the degradation of PBS samples in soil on available long-term soil temperature data. Previously published data on the relationship between molecular weight and mechanical properties were used to forecast the loss of functionality. This prediction was then compared to traction tests of aged PBS filaments used as fibre reinforcement of football hybrid turfs. The measurements match the predictions and show that a hybrid turf system with PBS fibres can be played on for at least 5.2 years before the fibres lose their mechanical properties.

Ascorbic acid (ASC) is a molecule naturally synthesized in plant cells, protecting against abiotic stresses by reducing reactive oxygen species (ROS), which cause oxidative damage. Aluminum (Al) toxicity is the major limiting factor on crop productivity in acidic soils, increasing ROS within cells and impairing the growth and development of plants. Exogenous antioxidant applications are an effective strategy to promote tolerance to abiotic stress. The objective was to evaluate the effect of foliar ASC applications (0, 50, 100, 200, and 400 mg L-1 ASC) and their interaction with Al toxicity (0, 400 mu M Al) in Star, an Al-sensitive cultivar of highbush blueberry. Significant increases of 1.6-fold in growth were observed in roots and leaves under treatment with 200 mg L-1 ASC. In the same treatment, increased pigments and antioxidant activity (similar to 1.2- to 2.3-fold) were observed concomitant with reduced lipid peroxidation. Positive correlations between organic acid exudation, the ASC/DHA ratio, and calcium levels were observed, whereas a negative correlation between lipid peroxidation and dehydroascorbate (DHA) was observed. Foliar ASC application also increased the ASC/DHA ratio in leaves and enhanced 2.2-fold organic acid exudation in the 200 mg L-1 ASC treatment. The results suggest that foliar ASC applications improved redox balance and underscore the potential of ASC as a practical solution to enhance resilience in Al-sensitive plants.