INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2015
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IF 3.313
Huan-Na Lin,Bin-Bin Hu,Ming-Jun Zhu
Clostridium thermocellum can degrade lignocellulosic materials to produce hydrogen , acetate, lactate and ethanol, and surfactants have been proven to have the ability of increasing the enzymatic hydrolysis of cellulosic substrates. Here, the effects of surfactants on the fermentation of spent mushroom compost by C. thermocellum were investigated and their underlying mechanisms were preliminarily studied. PEG8000 and JFC-E had different effects on the fermentation performance of spent mushroom compost. Under optimum conditions, PEG8000 increased the hydrogen production by 59.78%, compared to the control without surfactant, while JFC-E improved the accumulation of glucose and xylose rather than hydrogen yield. PEG8000 also had different impacts on the bioconversion of non-lignin substrates (Avicel, carboxyl methyl cellulose and filter paper). With added PEG8000, the hydrogen production was improved when using Avicel as the substrate, and with PEG8000, the yields of products and sugar accumulation were different from those without PEG8000, indicating that PEG8000 may increase the hydrogen yield by shifting the microbial metabolism.
研究领域:
微生物学
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生物能
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Plants-Basel
·
2025
·Vol. 14
·期 8
·1191
·
IF 4.1
Wenjing Qi,Jinping Bai,Han Yu,Guojun Han
Background: Heavy metal contamination significantly threatens crop growth and global food security. Understanding plant responses to such stress is crucial to developing stress-tolerant crops. This study explores the physiological and biochemical responses ofVigna radiata(L.) R. Wilczek to mercury, lead, and copper stress, focusing on the role of soluble sugar accumulation and biomass enhancement in conferring heavy metal tolerance. Methods: Commercially availableV. radiataseeds were exposed to varying concentrations (50, 150, and 300 mg/L) of mercurous nitrate, lead nitrate, and copper chloride under controlled conditions. The germination rates, seedling growth, and physiological parameters such as the soluble sugar and protein content were analyzed using spectrophotometry and statistical methods, including ANOVA. Results: The results demonstrated that lead ion stress significantly increased the seedling dry weight, while all the tested heavy metals promoted soluble sugar accumulation. Although the heavy metals inhibited germination and growth at higher concentrations,Vigna radiataexhibited strong tolerance at moderate stress levels. Conclusion: This study highlights the adaptive strategies ofV. radiata, including soluble-sugar-mediated osmotic adjustment and enhanced biomass allocation, which contribute to its resilience under heavy metal stress. These findings provide insights for breeding stress-resistant crops and managing heavy-metal-contaminated environments.
研究领域:
植物生理学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2021
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IF 6.291
Zekun Li,Jun Guo,Kun Jia,Zhiguo Zheng,Xiaomei Chen,Zhonghui Bai,Yuhao Yang,Bo Chen,Wei Yuan,Weihua Chen,Jian Yang
Oxyfluorfen (OXY) is widely used in agriculture as a herbicide, resulting in its continuous accumulation in the environment. The presence of OXY can be detected in soil and rivers. However, until now, the potential toxicity of OXY to aquatic organisms has not been evaluated. In this study, zebrafish was used as a model animal to evaluate OXY-induced liver toxicity. The study found that 0.25, 0.5, and 1 mg/L of OXY affected the early development of zebrafish and severely damaged the lipid and sugar metabolism in the liver of zebrafish larvae. Furthermore, a metabolic function disorder caused liver damage. OXY also caused inflammation by upregulating the inflammatory factors IL-6 , IL-8 , and TNF-α , and activated the apoptotic pathway to inhibit hepatocyte proliferation, resulting in zebrafish liver toxicity. Our research showed that OXY had certain toxic effects on zebrafish development and liver and could cause potential harm to other aquatic organisms and humans.
研究领域:
环境毒理学
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水生生物学
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
·
2024
·Vol. 13
·期 17
·2822
·
IF 4.7
Chun Zhan,Ruqi Jia,Shuzhen Yang,Meihong Zhang,Litao Peng
Chestnuts become sweetened with better tastes for fried products after cold storage, but the possible mechanism is not clear. The dynamics of sugar components and related physiological responses, as well as the possible molecular mechanism in chestnuts during cold storage, were investigated. Sucrose accumulation and starch degradation contributed to taste improvement. Sucrose content reached the peak after two months of cold storage, along with the accumulation of reducing sugars of maltose, fructose and glucose to a much lesser extent. Meanwhile, alpha-amylase and beta-amylase maintained high levels, and the activities of acid invertase and sucrose synthase increased. Transcriptome data demonstrated that differentially expressed genes (DEGs) were significantly enriched in the process of starch and sucrose metabolism pathway, revealing the conversion promotion of starch to sucrose. Furthermore, DEGs involved in multiple phytohormone biosynthesis and signal transduction, as well as the transcription regulators, indicated that sucrose accumulation might be interconnected with the dormancy release of chestnuts, with over 90% germinated after two months of cold storage. Altogether, the results indicated that cold storage improved the taste of chestnuts mainly due to sucrose accumulation induced by DEGs of starch and sucrose metabolism pathway in this period, and the sweetening process was interconnected with dormancy release.
研究领域:
植物生理学
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分子生物学
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食品科学
✓ 已验证
DOI
PubMed
高影响因子
Algal Research-Biomass Biofuels and Bioproducts
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2023
·
IF 5.1
Chong Yu,Chi Li,Ying Zhang,Xiang Du,Jing-Han Wang,Zhan-You Chi,Qian Zhang
Attached cultivation of microalgae using mariculture effluent could simultaneously realize cost-effective biomass production and effluent polishing, and the obtained microalgal biofilm could be readily applied to aquatic animals that feed directly on biofilms. However, the widespread existence of antibiotics in mariculture effluent may have inhibitory effects on microalgae. Existing studies regarding the influences of antibiotics on microalgae were overwhelmingly mostly conducted in suspended freshwater cultures, and the explored antibiotic concentrations were several orders of magnitudes higher than realist effluent, rendering limited guidance for practical applications. This study, therefore, studied three commonly observed antibiotics in mariculture effluent, i.e. sulfamethoxazole (SMX), tetracycline (TL), and clarithromycin (CLA), and explored their effects on attached seawater Chlorella sp. growth, nutrients removal, and antioxidative properties at environment-relevant concentrations (0.1–200 μg/L). Hormesis was shared among the three antibiotics, and highest biofilm density (14.6 g/m 2 ) was observed under 0.1 μg/L SMX. SMX displayed strongest chlorophyll impairment, while SMX, TL, and CLA respectively favored lipid (up to 42.4 %), protein (up to 39.6 %), and polysaccharides (up to 65.4 %) accumulation. Highest correlation between biofilm density and extracellular polymeric substances (EPS) contents as well as highest total nitrogen (TN) removal were observed under TL exposure, while total phosphorus (TP) removal among all groups met the strictest local discharge standard for mariculture effluent (TP < 0.2 mg/L). Antioxidative responses revealed least stress towards attached seawater Chlorella sp. under TL treatment, while best acclimation under SMX exposure. Potential coping mechanisms of this microalgae under each antibiotic exposure were proposed as well. This study expands the knowledge of microalgae biofilm under environment-relevant concentrations of antibiotics.
研究领域:
环境科学
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水生生物学
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）