Bartlettmerritt4371

In this work, we report a novel preparation of selenium nanorods (Se) doped cobalt oxide (Co3O4) nanoflowers encapsulated with graphene oxide (GO) nanocomposite (NC). Se nanorods were successfully decorated on Co3O4 nanoflowers and an increase in electrical conductivity was observed in Se-Co3O4@GO-NC. The as-prepared Se-Co3O4@GO-NC was utilized as an effective nanocomposite for the electrochemical detection of dimetridazole (DMZ) for the first time in the field of electrochemical sensors. Se-Co3O4@GO-NC modified glassy carbon electrode (GCE) which showed an excellent cathodic current response (17.6 μA) at the lower potential at -0.7314 V upon DMZ sensing. With the various optimized conditions, Se-Co3O4@GO-NC based electrochemical sensor displayed a lengthy linear range of 0.02-83.72 μM, limit of detection 3.4 nM and sensitivity of 1.898 μA.μM-1. cm-2 for DMZ detection. In addition, Se-Co3O4@GO-NC revealed fabulous catalytic reduction activity for DMZ, when compared to GO and Se-Co3O4 modified GCE. Additionally, Se-Co3O4@GO-NC is applied in real sample analysis of pigeon egg, milk and pigeon meat. TLR2-IN-C29 supplier The results illustrated that Se-Co3O4@GO-NC can be a promising nanocomposite for the electrocatalytic reduction of DMZ in clinical samples in biomedical field.Nanozyme, a kind of nanomaterials with enzymatic activity, has been developing vigorously over the past years owing to its advantages such as low-cost, easy storage, ease of use in harsh environments and so on, compared with natural enzymes. At present, as a typical two-dimensional nanomaterial, molybdenum disulfide (MoS2) and their hybrids with unexpected enzyme-like activities have caused wide attention. In this review, we mainly investigated the enzyme-like activities of MoS2 based nanomaterials, including peroxidase-like activity, catalase-like activity and superoxide dismutase-like activity. Furthermore, we systematically introduce recent research progress of MoS2 based nanomaterials in the fields of biological applications such as radiation protection, cancer therapy, antibacterial, and wound healing. Finally, the current challenges and perspectives of MoS2 based nanomaterials in the future are also discussed and proposed. We expect this review may be significant to understand the properties of MoS2 based nanomaterials and the development of two-dimensional nanomaterials with enzyme mimicking activities.Injectable thermosensitive hydrogel has been regarded as attractive drug delivery system, which displays a sol-gel phase transition upon injection in response to temperature. Recently, thermosensitive hydrogel has become a matter of importance in cancer therapy, providing high local drug concentration, sustained release characteristics, minimal invasiveness, and low systemic toxicities. Here, we review the extensive application of thermosensitive hydrogel in local cancer therapy, including chemotherapy, photothermal therapy, photodynamic therapy, gene therapy, chemo-photothermal combined therapy, and chemo-/immuno- combined therapy.Natural deep eutectic solvents (NaDESs) are promising green alternatives to conventional solvents widely applied in the extraction of natural products due to their physical and chemical superiorities. In present study, 22 NaDESs consisted from food grade ingredients were screened in ultrasonic assisted extraction (UAE) of bioactive compounds from safflower. The oral bioavailabilities of hydroxysafflor yellow A (HSYA) and anhydrosafflor yellow B (ASYB) in the extracts were then investigated in SD rats with the help of HPLC-MS technique. The results revealed that l-proline-acetamide (l-Pro-Am) was an effective solvent with the yields of HSYA and ASYB at 32.83 and 8.80 mg/g. Pharmacokinetic studies revealed that the blood level of HSYA and ASYB were significantly higher after oral administration of l-Pro-Am extract than that of aqueous extract. Especially, the relative bioavailabilities (to aqueous extract) of HSYA and ASYB were calculated 183.5% and 429.8%.Lotus root (Nelumbo nucifera G.) is a high economic value crop in the world. In this study, the storage characteristics (color, sensory, texture, and fatty acids) of lotus root ("Elian No.5″) were evaluated at different harvest periods (September 2018, October 2018, November 2018, December 2018, and January 2019). Moreover, the storage characteristics were evaluated after the short- term and long-term storage of lotus root at 4 °C and 20 °C. The hardness of lotus root significantly decreased at both temperatures (4 °C and 20 °C) during the first 3 days of storage. In contrast, the decrease in hardness delayed at 4 °C (beyond 3 days of storage). Further, genes related to hardness at different storage temperatures were identified using the RNA-seq and qRT-PCR. The results of this study provide a reference for lotus root storage and a basis for the molecular breeding of longterm-storable lotus root.Protein modifications in liquid infant formula (IF) have been widely studied, but distinguishing between heat- and storage-induced structural changes remains challenging. A generic liquid IF was subjected to direct or indirect UHT treatment and stored at 40 °C up to 180 days. Colour and pH were monitored and structural changes were characterised by dynamic light scattering, SDS-PAGE and centrifugal field-flow fractionation (FFF) coupled with multi-angle light scattering (MALS) and UV detectors to evaluate whether heat-induced differences would level out during storage. Both direct- and indirect UHT treatment led to structural changes, where the higher heat load of the indirect UHT treatment caused more pronounced changes. Indications were that storage-induced changes in pH, browning and non-reducible cross-links were not dependent on UHT treatment. However, FFF-MALS-UV analysis allowed characterisation of complex aggregates, where structural changes continued to be most pronounced in indirect UHT treated samples, and different storage-induced aggregation behaviour was observed.Nitrite, added to cured meat for its bacteriological and technological properties, is implicated in the formation of nitroso compounds (NOCs), such as nitrosylheme, nitrosamines and nitrosothiols, suspected to have a potential impact on human health. The mechanisms involved in NOC formation are studied in regard with the dose-response relationship of added nitrite and its interaction with ascorbate on NOC formation in a cured and cooked meat model. The impact of a second cooking stage on nitrosation was evaluated. The addition of nitrite in the cured and cooked model promoted heme iron nitrosylation and S-nitrosation but not N-nitrosation. Nitrite reduced lipid oxidation without an additional ascorbate effect. The second cooking sharply increased the nitrosamine content while the presence of ascorbate considerably lowered their levels and protected nitrosothiols from degradation. This study gives new insights on the chemical reactivity of NOCs in a cured meat model.