Scholarlink

<p>Carbon dots&#xa0;(CDs) were efficiently synthesized from red plum (<i>Carissa</i> sp.) through the hydrothermal method, and their physicochemical properties, structural characteristics, and applications were systematically investigated. The yield of CDs was quantified as 112.50 ± 2.50&#xa0;µg/mL for whole fruit-derived samples (BC-WF-CDs) and 103.33 ± 2.31&#xa0;µg/mL for those obtained from the residue of the anthocyanin extraction process (BC-RES-CDs). Spectroscopic analyses confirmed the presence of characteristic functional groups and inherent&#xa0;optical features of the synthesized CDs. TEM micrographs revealed a spherical morphological structure and a size distribution ranging from 3 to 13.5&#xa0;nm. BC-WF-CDs exhibited higher antifungal efficacy against <i>Aspergillus parasiticus</i> and <i>Aspergillus flavus</i>, compared to BC-RES-CDs (<i>P</i> &lt; 0.05). Nevertheless, BC-RES-CDs exhibited superior antioxidant capacity, with higher DPPH radical scavenging activity at dispersion levels exceeding 40&#xa0;µg/mL (<i>P</i> &lt; 0.05). Antibacterial assessment further revealed distinct differences in the potency of CDs synthesized from different starting materials. BC-WF-CDs demonstrated superior antibacterial activity even at lower concentrations, which achieved both microbial inhibition and killing. The conducted challenge study to examine the efficacy of CDs from BC-WF at different concentrations (300 and 600&#xa0;mg/kg) showed the inhibited the growth of <i>A. flavus</i> on dried and salted Nile tilapia fillets more effectively than the positive control, potassium sorbate (300&#xa0;mg/kg). Peroxide value and thiobarbituric acid reactive substances values of samples that were treated with BC-WF-CDs at 300&#xa0;mg/kg (CD300) were lower or comparable with the commercial synthetic positive control, PS300, during 9-days&#xa0;storage time. Thus, the CDs synthesized from different precursors possessed significant differences in&#xa0;characteristics and inhibitory efficacies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Green Synthesis of Carbon Dots from Bengal Currant: Physicochemical Characterization, Bio-functional Properties, and Application in the Preservation of Dried Nile Tilapia

  • 期刊论文

  • 发表日期：

    2026年8月5日

查看全文
  • Muralidharan Nagarajan,
  • Arunachalasivamani Ponnusamy,
  • Elavarasan Govindhasami,
  • Suguna Palanisamy,
  • Balamanikandan Vijayakumar,
  • Raj Kumar John Kumar,
  • Soottawat Benjakul

摘要

Carbon dots (CDs) were efficiently synthesized from red plum (Carissa sp.) through the hydrothermal method, and their physicochemical properties, structural characteristics, and applications were systematically investigated. The yield of CDs was quantified as 112.50 ± 2.50 µg/mL for whole fruit-derived samples (BC-WF-CDs) and 103.33 ± 2.31 µg/mL for those obtained from the residue of the anthocyanin extraction process (BC-RES-CDs). Spectroscopic analyses confirmed the presence of characteristic functional groups and inherent optical features of the synthesized CDs. TEM micrographs revealed a spherical morphological structure and a size distribution ranging from 3 to 13.5 nm. BC-WF-CDs exhibited higher antifungal efficacy against Aspergillus parasiticus and Aspergillus flavus, compared to BC-RES-CDs (P < 0.05). Nevertheless, BC-RES-CDs exhibited superior antioxidant capacity, with higher DPPH radical scavenging activity at dispersion levels exceeding 40 µg/mL (P < 0.05). Antibacterial assessment further revealed distinct differences in the potency of CDs synthesized from different starting materials. BC-WF-CDs demonstrated superior antibacterial activity even at lower concentrations, which achieved both microbial inhibition and killing. The conducted challenge study to examine the efficacy of CDs from BC-WF at different concentrations (300 and 600 mg/kg) showed the inhibited the growth of A. flavus on dried and salted Nile tilapia fillets more effectively than the positive control, potassium sorbate (300 mg/kg). Peroxide value and thiobarbituric acid reactive substances values of samples that were treated with BC-WF-CDs at 300 mg/kg (CD300) were lower or comparable with the commercial synthetic positive control, PS300, during 9-days storage time. Thus, the CDs synthesized from different precursors possessed significant differences in characteristics and inhibitory efficacies.