上海地方志最新文献

{"title":"Comparative zinc uptake and metabolic responses of Ipomoea aquatica to hydroponic exposure of zinc sulphate, zinc oxide, and zinc oxide nanoparticles","authors":"Koe Wei Wong, Chee Kong Yap, Rosimah Nulit, Hishamuddin Omar, Ahmad Zaharin Aris, Yoshifumi Horie, Meng Chuan Ong, Wan Mohd Syazwan","doi":"10.62184/mmc.jmmc1100202533","DOIUrl":"https://doi.org/10.62184/mmc.jmmc1100202533","url":null,"abstract":"This research aimed to investigate zinc (Zn) accumulation patterns and the resulting metabolite-profile alterations in Ipomoea aquatica (I. aquatica) (water spinach) when hydroponically exposed to 50.0 mg/L concentrations of zinc sulphate (ZnSO₄), zinc oxide (ZnO), and zinc oxide nanoparticles (ZnO NPs). Roots consistently exhibited the highest Zn accumulation across all treatments. ZnSO₄ exposure led to the maximum concentration of 4620 ± 458 mg/kg DW in roots, while ZnO NPs resulted in 2830 ± 321 mg/kg DW and ZnO in 957 ± 40.5 mg/kg DW in roots. Stems generally showed the lowest Zn accumulation, with the control at 43.2 mg/kg DW, though ZnSO₄-treated stems had the highest accumulation among treated groups at 962 ± 19.2 mg/kg DW. The overall Zn uptake in all biological parts (leaves, stems, and roots) followed the order: ZnSO₄ > ZnO NPs > ZnO > Control. GC-MS analysis revealed that all Zn treatments significantly altered I. aquatica's metabolite profile, resulting in a drastically reduced diversity of detectable metabolites compared to the control. For instance, the number of consistently detected metabolites plummeted from 45 in the control to just 6 in ZnSO₄, 9 in ZnO, and 7 in ZnO NPs treatments. Moreover, the mean peak height, an indicator of overall metabolite abundance, sharply declined from 486000 ± 36000 in the control to 4600 ± 462 in ZnO NPs exposure. While cyclooctasiloxane (hexadecamethyl) and cyclononasiloxane (octadecamethyl) were consistently detected in all treatments, cyclohexasiloxane (dodecamethyl) and cyclopentasiloxane (decamethyl) were exclusive to Zn-enriched experimental sets, and cyclotetrasiloxane (octamethyl) was specifically associated with ZnO and ZnO NPs exposure. Notably, silicic acid (diethyl bis(trimethylsilyl) ester) and pyridine-3-carboxamide (1,2-dihydro-4,6-dime) were uniquely detected in the leaves of plants exposed to ZnO NPs. This suggests potential roles in toxicity mediation, possibly through a silica coating effect reducing Zn²⁺ dissolution, or altered metabolic pathways, given pyridine-3-carboxamide's diverse biological activities, which include antiviral, antibacterial, and anticancer properties. These findings collectively underscore how the form of Zn critically influences its bioavailability, accumulation patterns, phytotoxicity, and distinct metabolite profile alterations in I. aquatica, providing crucial insights for optimizing agricultural practices and environmental management strategies, particularly regarding phytoremediation in heavy metal-contaminated environments and micronutrient management.","PeriodicalId":57415,"journal":{"name":"上海地方志","volume":"1 1","pages":"126-139"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciparkpub.com/articles/98064_1760528235.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147892762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cardiology News / Recent Literature Review / Third Quarter 2015","authors":"Antonis S. Manolis, Hector Anninos","doi":"10.2015/hc.v10i4.743","DOIUrl":"https://doi.org/10.2015/hc.v10i4.743","url":null,"abstract":"TCT Meeting 2015: San Francisco, 11-15/10/2015 HCS Congress: Thessaloniki, 29-31/10/2015 AHA Scientific Sessions: Orlando, 7-11/11/2015 Boston AF Symposium : Orlando, 14-16/1/2016 ACC 65 th Annual Session: Chicago, 2-4/4/2016 HRS 37 th Annual Meeting: San Francisco, 4-7/5/16 CardioStim/Europace : Nice, 8-11/6/2016 Euro PCR : Paris, 17-20/5/2016 ESC Meeting: Rome, 27-31/8/2016 Sustained chronic obesity results in chronic stretch, diffuse interstitial fibrosis, conduction abnormalities, and increased vulnerability to AF In an animal study, 10 chronically obese sheep, compared with 10 age-matched controls, demonstrated greater total body fat, left atrial (LA) volume, LA pressure, and pulmonary artery pressures, reduced atrial conduction velocity with increased conduction heterogeneity, increased fractionated electrograms, decreased posterior LA voltage, and increased voltage heterogeneity (all p 13 years. The specificity for the 15-year risk of CHF exceeded 90% when PVCs included at least 0.7% of ventricular beats. The population-level risk for incident CHF attributed to PVCs was 8.1%. The authors concluded that in a population-based sample, a higher frequency of PVCs was associated with a decrease in LVEF, an increase in incident CHF, and increased mortality (Dukes JW et al, J Am Coll Cardiol 2015;66:101-109)... (excerpt)","PeriodicalId":57415,"journal":{"name":"上海地方志","volume":"10 4","pages":"240-249"},"PeriodicalIF":0.0,"publicationDate":"2015-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147915071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}