Pineapple peel waste was transformed into bacterial cellulose by employing a fermentation process. A high-pressure homogenization process was implemented to curtail the size of bacterial nanocellulose, and an esterification process was undertaken to produce cellulose acetate. TiO2 nanoparticles, 1%, and graphene nanopowder, also 1%, were incorporated into the synthesis of nanocomposite membranes. Characterizing the nanocomposite membrane included employing FTIR, SEM, XRD, BET analysis, tensile testing, and measuring bacterial filtration effectiveness using the plate count method. woodchip bioreactor The observed diffraction pattern showcased a pronounced cellulose structure at a 22-degree angle, alongside a less significant change in the structure at the 14 and 16-degree diffraction peaks. Not only did the crystallinity of bacterial cellulose increase from 725% to 759%, but a functional group analysis also revealed that certain peak shifts within the spectrum suggested a change in the functional groups of the membrane. Analogously, the membrane's surface morphology became more rugged, emulating the structural pattern of the mesoporous membrane. The addition of TiO2 and graphene synergistically boosts the crystallinity and effectiveness of bacterial filtration within the nanocomposite membrane structure.
Alginate (AL) in a hydrogel configuration is a commonly utilized material for drug delivery. For the treatment of breast and ovarian cancers, the current investigation achieved an optimal alginate-coated niosome nanocarrier system for the simultaneous delivery of doxorubicin (Dox) and cisplatin (Cis), with the intent of reducing drug dosages and tackling multidrug resistance. How do the physiochemical traits of uncoated niosomes containing Cisplatin and Doxorubicin (Nio-Cis-Dox) differ from those of the alginate-coated niosomes formulation (Nio-Cis-Dox-AL)? The three-level Box-Behnken approach was scrutinized for optimizing the particle size, polydispersity index, entrapment efficacy (%), and the percentage of drug release from nanocarriers. Nio-Cis-Dox-AL's encapsulation of Cis and Dox, respectively, showed efficiencies of 65.54% (125%) and 80.65% (180%). The maximum release of drugs from alginate-coated niosomes exhibited a reduction. Coating Nio-Cis-Dox nanocarriers with alginate resulted in a lower zeta potential value. To explore the anticancer properties of Nio-Cis-Dox and Nio-Cis-Dox-AL, in vitro cellular and molecular experiments were carried out. A lower IC50 value for Nio-Cis-Dox-AL was found in the MTT assay, significantly below that of the Nio-Cis-Dox formulations and free drugs. Cellular and molecular assays revealed a substantial increase in apoptosis induction and cell cycle arrest in MCF-7 and A2780 cancer cells when treated with Nio-Cis-Dox-AL, contrasting with the effects observed with Nio-Cis-Dox and free drugs. The coated niosomes treatment showed a higher level of Caspase 3/7 activity post-treatment, when assessed in relation to the uncoated niosomes and the control sample without the drug. A synergistic inhibition of cell proliferation in MCF-7 and A2780 cancer cells was achieved through the concurrent use of Cis and Dox. The effectiveness of co-delivering Cis and Dox, encapsulated within alginate-coated niosomal nanocarriers, was unequivocally demonstrated by all anticancer experimental results for ovarian and breast cancer treatment.
We investigated the effect of pulsed electric field (PEF) assisted oxidation with sodium hypochlorite on the structural integrity and thermal characteristics of starch. read more The oxidation process applied to starch resulted in a 25% increase in carboxyl content, exceeding the level achieved by the traditional oxidation method. Dents and cracks were scattered across the surface of the PEF-pretreated starch, easily observable. PEF treatment of oxidized starch resulted in a more significant reduction in peak gelatinization temperature (Tp) – 103°C for PEF-assisted oxidized starch (POS) versus 74°C for oxidized starch (NOS) – emphasizing the impact of the treatment. This treatment also diminishes viscosity and improves thermal properties in the starch slurry. Ultimately, the integration of PEF treatment and hypochlorite oxidation provides a successful means to create oxidized starch. PEF's potential for expanding starch modification is significant, enabling broader oxidized starch applications in paper, textiles, and food industries.
In the invertebrate immune response, leucine-rich repeat and immunoglobulin domain-containing proteins (LRR-IGs) play a critical role as an important class of immune molecules. The Eriocheir sinensis was found to harbor a novel LRR-IG, which was named EsLRR-IG5. A LRR-IG protein-characteristic structure was present, namely an N-terminal LRR region and three immunoglobulin domains. EsLRR-IG5 displayed ubiquitous expression across all examined tissues, and its transcriptional levels exhibited an increase following exposure to Staphylococcus aureus and Vibrio parahaemolyticus. Extraction of recombinant proteins, rEsLRR5 and rEsIG5, encompassing LRR and IG domains from the EsLRR-IG5 strain, was successfully completed. rEsLRR5 and rEsIG5 bound to gram-positive and gram-negative bacteria, along with lipopolysaccharide (LPS) and peptidoglycan (PGN). Furthermore, rEsLRR5 and rEsIG5 demonstrated antibacterial properties against Vibrio parahaemolyticus and Vibrio alginolyticus, showcasing bacterial agglutination activity against Staphylococcus aureus, Corynebacterium glutamicum, Micrococcus lysodeikticus, Vibrio parahaemolyticus, and Vibrio alginolyticus. SEM analysis showed that rEsLRR5 and rEsIG5 induced membrane damage in Vibrio parahaemolyticus and Vibrio alginolyticus, which could lead to intracellular leakage and cell death. This study's findings offer insights into the crustacean immune response, mediated by LRR-IG, along with potential antibacterial agents for aquaculture disease management and prevention strategies.
The storage characteristics and longevity of tiger-tooth croaker (Otolithes ruber) fillets, stored at 4 °C, were assessed using an edible film composed of sage seed gum (SSG) incorporating 3% Zataria multiflora Boiss essential oil (ZEO). Results were compared to both a control film (SSG alone) and Cellophane. In comparison to alternative films, the SSG-ZEO film produced a substantial decrease in microbial growth, as indicated by total viable count, total psychrotrophic count, pH, and TVBN, and lipid oxidation, as determined by TBARS, with a p-value less than 0.005. ZEO's antimicrobial activity displayed the highest potency against *E. aerogenes* (MIC 0.196 L/mL), in contrast to its lowest potency against *P. mirabilis* (MIC 0.977 L/mL). E. aerogenes was identified in O. ruber fish, kept at refrigerated temperatures, as an organism that indicates biogenic amine production. In samples containing *E. aerogenes*, the active film effectively curtailed the accumulation of biogenic amines. A correlation was evident between the release of ZEO's phenolic compounds from the active film into the headspace and the decrease in microbial growth, lipid oxidation, and biogenic amine formation within the samples. Hence, a biodegradable antimicrobial-antioxidant packaging, consisting of SSG film with 3% ZEO, is proposed as a means to increase the shelf life and decrease the accumulation of biogenic amines in refrigerated seafood.
Employing spectroscopic methods, molecular dynamics simulation, and molecular docking studies, this research evaluated the effect of candidone on DNA structure and conformation. Candidone's binding to DNA in a groove-binding mode was observed through a combination of fluorescence emission peaks, ultraviolet-visible spectra, and molecular docking. Fluorescence spectroscopy of DNA demonstrated a static quenching mechanism attributable to the presence of candidone. Biomass fuel Candidone's spontaneous and high-affinity DNA binding was further confirmed through thermodynamic measurements. The binding process was strongly influenced by the hydrophobic forces. Infrared Fourier transform data suggested candidone preferentially bound to adenine-thymine base pairs within the DNA minor grooves. A slight modification to DNA structure, caused by candidone, was observed through thermal denaturation and circular dichroism analysis, and this was confirmed by the results from the molecular dynamics simulation study. A more extended DNA structure was observed in the molecular dynamic simulation, demonstrating alterations to its structural flexibility and dynamics.
Recognizing the inherent flammability of polypropylene (PP), a novel and highly efficient carbon microspheres@layered double hydroxides@copper lignosulfonate (CMSs@LDHs@CLS) flame retardant was developed. The compound's efficacy stems from strong electrostatic interactions between carbon microspheres (CMSs), layered double hydroxides (LDHs), and lignosulfonate, coupled with the chelation of lignosulfonate with copper ions; it was then incorporated into the PP matrix. Outstandingly, CMSs@LDHs@CLS not only showed an improvement in its dispersibility within the poly(propylene) (PP) matrix, but also concurrently delivered superior flame-retardant performance in the composites. By adding 200% CMSs@LDHs@CLS, the combined oxygen index of CMSs@LDHs@CLS and the composite material (PP/CMSs@LDHs@CLS) scaled to 293%, satisfying the UL-94 V-0 standard. PP/CMSs@LDHs@CLS composites, assessed using cone calorimeter tests, exhibited marked reductions in peak heat release rate (288%), total heat release (292%), and smoke production (115%) when compared to PP/CMSs@LDHs composites. The advancements in PP were attributed to the improved dispersibility of CMSs@LDHs@CLS in the matrix, effectively demonstrating how CMSs@LDHs@CLS lowered fire risks in the material. Possible factors underlying the flame retardant property of CMSs@LDHs@CLSs include the condensed-phase flame retardant effect of the char layer and the catalytic charring of copper oxides.
Our study successfully developed a biomaterial consisting of xanthan gum and diethylene glycol dimethacrylate, reinforced with graphite nanopowder, for its potential application in the engineering of bone defects.