LC-MS-based metabolomics reveals metabolite dynamic changes during irradiation of goat meat.

The current study applied an untargeted metabolomics approach by ultra high performance liquid chromatography quadrupole-orbitaltrap high resolution mass spectrometry (UHPLC-Q-Oritrap-MS) to identify the chemical composition of irradiated goat meat and investigate the effect of irradiation on its metabolic profile and meat quality. A total of 103 metabolites were identified as differential metabolites responsible for metabolic changes in irradiated goat meat, which were involved in phenylalanine, tyrosine and tryptophan biosynthesis, phenylalanine metabolism and purine metabolism. Differential metabolites comprising amino acids, nucleotides and their derivatives were determined as the discriminating factors responsible for the meat quality during irradiation.

Time-Series Lipidomics Insights into the Progressive Characteristics of Lipid Constituents of Fresh Walnut during Postharvest Storage.

A high-throughput lipid profiling platform adopting an accurate quantification strategy was built based on Q-Orbitrap mass spectrometry. Lipid components of fresh walnut during postharvest storage were determined, and the fatty acid distributions in triacylglycerol and polar lipids were also characterized. A total of 554 individual lipids in fresh walnut were mainly glycerolipids (56.

Untargeted foodomics reveals molecular mechanism of magnetic field effect on Feng-flavor Baijiu ageing.

Ageing is a time-consuming step in Baijiu manufacture, stimulating an urgent requirement of optimization. Variation of artificial aged Feng-flavor Baijiu by inhomogeneous alternating magnetic field was investigated through quantitative foodomics combined with confirmed ultra high performance liquid chromatography quadrupole-orbitaltrap high resolution mass spectrometry (UHPLC-Q-Orbitrap). A total of 153 substances were identified with significant variables (p < 0.

UHPLC-Q-Orbitrap-based lipidomics reveals molecular mechanism of lipid changes during preservatives treatment of Hengshan goat meat sausages.

As preservative are extensively applied to prevent the quality degradation of Hengshan goat meat sausages, safety assessment based on lipid and elucidation of dynamic change mechanism is urgently needed. The effect of preservatives on lipidome profiles of sausages was investigated using UHPLC-Q-Orbitrap. Totally, 9 subclasses of 70 characteristic lipids (Cer, DG, LPC, PC, PE, PI, PS, SM, TG) were quantified accurately (LOD with 0.

Proteomics analysis to investigate the impact of diversified thermal processing on meat tenderness in Hengshan goat meat.

During the thermal processing, proteins of Hengshan goat meat undergo structural modifications such as degradation, oxidation and denaturation, ultimately affect the palatability and acceptability. The results of several objective metrics demonstrated that thermal processing exhibited significant impacts on the tenderness of goat meat. The 551, 84, 72, and 121 proteins were identified in the control and thermal processed groups (boiled, steamed, and roasted), respectively.

Molecular mechanism associated with the use of magnetic fermentation in modulating the dietary lipid composition and nutritional quality of goat milk.

Standard fermentation (SF) mainly affected the metabolism of glycerophospholipid and sphingolipid, and increased the total lipid content of goat milk. Content of total lipid was decreased by magnetic fermentation compared with SF, mainly due to triacylglycerol and diacylglycerol. Comprehensive characteristic of lipids dynamic changes during standard and magnetic fermentation was performed using high-throughput quantitative lipidomics.

Integrated metabolomics and lipidomics profiling reveals beneficial changes in sensory quality of brown fermented goat milk.

Fermentation and thermal processing can improve the sensory properties of foods. Chemical composition of fermented brown goat milk was investigated using an integrated lipomics and metabonomic method while the effects of changes in chemical composition on sensory quality were also explored. After fermentation, organic acid, peptide and medium- and long-chain fatty acid contents in brown goat milk samples increased significantly.

Novel fabrication of stable Pickering emulsion and latex by hollow silica nanoparticles.

Hypothesis: In conventional Pickering emulsions, solid nanoparticles are usually employed as stabilizers. However, hollow nanoparticles are desirable candidates for the stabilization of Pickering emulsion and latex due to their strong adsorption property and low density stemming from the hollow cavity structure.

Experiments: In order to investigate the superiority of hollow silica nanoparticles in stabilizing emulsions, Pickering emulsion and polyacrylate latex were fabricated using hollow silica nanoparticles as stabilizers.

Polyelectrolyte complex from cationized casein and sodium alginate for fragrance controlled release.

CA/NaAlg polyelectrolyte complex (PEC) novelly obtained from cationized casein (CA) and sodium alginate (NaAlg) via electrostatic interactions was designed for fragrance (vanillin) controlled release. Structural variation between pristine CA/NaAlg PEC and vanillin-loaded CA/NaAlg PEC were investigated by ultraviolet (UV), fourier transform infrared (FI-TR) and X-ray diffraction (XRD). Pristine CA/NaAlg PEC and vanillin-loaded CA/NaAlg PEC were demonstrated spherical in shape by transmission electron microscopy (TEM).

Microbiome-Metabolomics Analysis of the Impacts of Long-Term Dietary Advanced-Glycation-End-Product Consumption on C57BL/6 Mouse Fecal Microbiota and Metabolites.

Thermally processed diets are widely consumed, although advanced-glycation end products (AGEs) are unavoidably formed. AGEs, clusters of protein-cross-linking products, become less digestible because they impair intestinal peptidase proteolysis. We characterized the impacts of dietary AGEs on gut microbiota through a microbiome-to-metabolome association study.

Fabrication of modified hydrogenated castor oil/GPTMS-ZnO composites and effect on UV resistance of leather.

Leather products are made from the natural skin collagen fibers. It is vulnerable to the environmental factor such as solar ultraviolet irradiation in the using process. Therefore anti-UV performance is a very important quality, particularly for chrome-free leather.

Dietary advanced glycation end products modify gut microbial composition and partially increase colon permeability in rats.

Scope: The adverse impacts of dietary advanced glycation end products (AGEs) on health are currently of interest. These compounds are inevitably formed during thermal food processing and make foods less digestible because of protein cross-linking. This study examined not only whether dietary AGEs alter cecal microbiota and their metabolites but also their effects on colon permeability.

Micelle-template synthesis of hollow silica spheres for improving water vapor permeability of waterborne polyurethane membrane.

Hollow silica spheres (HSS) with special interior spaces, high specific surface area and excellent adsorption and permeability performance were synthesized via micelle-template method using cetyl trimethyl ammonium bromide (CTAB) micelles as soft template and tetraethoxysilane (TEOS) as silica precursor. SEM, TEM, FT-IR, XRD, DLS and BET-BJH were carried out to characterize the morphology and structure of as-obtained samples. The results demonstrated that the samples were amorphous with a hollow structure and huge specific surface area.

Effect of Linear-Hyperbranched Amphiphilic Phosphate Esters on Collagen Fibers.

The surfactants of the linear-hyperbranched phosphate esters (PAMAM-3-Ps) have been constructed through random multibranching esterification of lauroyl chloride and phosphate ester as a branching agent. Subsequently, a series of surfactant products were obtained. Benefiting from the amphiphilic structure with the hydrophilic core and many hydrophobic tails, PAMAM-3-Ps were able to self-assemble into nanomicelles in aqueous media.

Robust, Self-Healing Superhydrophobic Fabrics Prepared by One-Step Coating of PDMS and Octadecylamine.

A robust, self-healing superhydrophobic poly(ethylene terephthalate) (PET) fabric was fabricated by a convenient solution-dipping method using an easily available material system consisting of polydimethylsiloxane and octadecylamine (ODA). The surface roughness was formed by self-roughening of ODA coating on PET fibers without any lithography steps or adding any nanomaterials. The fabric coating was durable to withstand 120 cycles of laundry and 5000 cycles of abrasion without apparently changing the superhydrophobicity.

RAFT-Mediated Polymerization-Induced Self-Assembly of Poly(Acrylic Acid)-b-Poly(Hexafluorobutyl Acrylate): Effect of the pH on the Synthesis of Self-Stabilized Particles.

This paper describes a very simple strategy towards self-stabilized poly(acrylic acid)--poly(hexafluorobutyl acrylate) (PAA--PHFBA) block copolymer particles via reversible addition-fragmentation chain transfer (RAFT)-mediated polymerization-induced self-assembly. Hexafluorobutyl acrylate (HFBA) monomer conversion and number-average molar mass of PAA--PHFBA increased gradually with the increase in the pH value of the aqueous phase. When pH < 10, the molecular weight distributions of PAA--PHFBA were narrow, however, when the pH was raised to 11.

Hollow Casein-Based Polymeric Nanospheres for Opaque Coatings.

Casein-based hollow polymeric sphere were fabricated through emulsifier-free polymerization coupled with alkali swelling approach. Hollow structure and nanoscale size of casein-based polymeric spheres were verified by TEM, AFM, SEM, and UV-vis spectra. The as-obtained hollow spheres were proved exhibiting superior opaque characteristic.

Biomimetic superhydrophobic surfaces by combining mussel-inspired adhesion with lotus-inspired coating.

Superhydrophobic surfaces on PET textiles were fabricated by combined bioinspiration from the strong adhesion of marine mussels and the two-scale structure of lotus leaves under mild conditions. Dopamine can spontaneously polymerize in alkaline aqueous solution to form a thin adhesive layer of polydopamine (PDA) wrapping on the micro-scale fibers. The as-formed thin PDA layer worked as a reactive template to generate PDA nanoparticles decorated on the fiber surfaces, imparting the textiles with excellent UV-shielding properties as well as a hierarchical structure similar to the morphology of the lotus leaf.

Fabrication of Robust and Antifouling Superhydrophobic Surfaces via Surface-Initiated Atom Transfer Radical Polymerization.

Superhydrophobic surfaces were fabricated via surface-initiated atom transfer radical polymerization of fluorinated methacrylates on poly(ethylene terephthalate) (PET) fabrics. The hydrophobicity of the PET fabric was systematically tunable by controlling the polymerization time. The obtained superhydrophobic fabrics showed excellent chemical robustness even after exposure to different chemicals, such as acid, base, salt, acetone, and toluene.

Animal-derived natural products review: focus on novel modifications and applications.

Bio-based natural products have attracted exploding interests, while the environmental pollutions caused by the synthetic polymers are deteriorating dramatically. In this review, we provide a comprehensive overview of the modification of animal-derived natural products with an emphasis on casein, chitosan and collagen. Furthermore, their novel applications in controlled drug delivery system, leather finishing, and pollutant adsorption are also demonstrated.

Aza-polycyclic aromatic hydrocarbons from Saruma henryi.

A new azafluoranthene alkaloid, named sarumine (1), along with six known N-containing derivatives of phenanthrenes, 2-7, were isolated from the whole herb of Saruma henryi. Their structures were elucidated on the basis of extensive spectroscopic analysis. Moreover, antimicrobial activities of all compounds were evaluated.

Structural and Interfacial Properties of Hyperbranched-Linear Polymer Surfactant.

With oleic acid grafting modification, a series of hyperbranched-linear polymer surfactants (HLPS) were prepared by hydroxyl-terminated hyperbranched polymer (HBP), which was gained through a step synthesis method using trimethylolpropane and AB monomer. The AB monomers were obtained through the Michael addition reaction of methyl acrylate and diethanol amine. The structures of HLPS were characterised by Fourier transform infrared spectrophotometer and nuclear magnetic resonance (NMR), which indicated that HBP was successfully modified by oleic acid.