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Disposable Food Packaging and Serving Materials—Trends and Biodegradability
Food is an integral part of everyone’s life. Disposable food serving utensils and tableware are a very convenient solution, especially when the possibility of the use of traditional dishes and cutlery is limited (e.g., takeaway meals). As a result, a whole range of products is available on the market: plates, trays, spoons, forks, knives, cups, straws, and more. Both the form of the product (adapted to the distribution and sales system) as well as its ecological aspect (biodegradability and life cycle) should be of interest to producers and consumers, especially considering the clearly growing trend of “eco-awareness”. This is particularly important in the case of single-use products. The aim of the study was to present the current trends regarding disposable utensils intended for contact with food in the context of their biodegradability. This paper has summarized not only conventional polymers but also their modern alternatives gaining the attention of manufacturers and consumers of single-use products (SUPs).
Journal Article
Round fabric art bowls : sew artisan bowls with infinite possibilities
\"Learn how to construct fabric bowls and how to adjust the size so you can create your own inspiring piece in the size you want. Inside are six 18\" bowl projects that include machine sewing and piecing, modified paper piecing, applique, English Paper Piecing, and more for eye-catching results\"-- Provided by publisher.
BOOK
Plastic tableware use, microplastic accumulation, and sperm quality: from epidemiological evidence to FOXA1/p38 mechanistic insights
Microplastics (MPs), as emerging contaminants, may adversely affect male reproductive health. This study investigated the potential association between MP accumulation in human semen and sperm quality. Furthermore, the molecular mechanisms underlying MPs-induced sperm quality impairment were characterized using representative polystyrene microplastics (PS-MPs), murine models, and spermatogonial cell cultures. Among 200 semen samples, the overall detection rate of MPs was 55.5% (111/200). A total of 128 MPs were identified in semen, with PS (32.03%) and PVC (36.72%) being the predominant microplastic polymers. Epidemiological analyses revealed a significant positive association between plastic tableware (PT) use frequency and MP accumulation in semen. Stratified analyses further revealed a strong association between total MPs exposure and reduced sperm concentration among individuals with BMI < 24 kg/m² and frequent PT use. In murine models, exposure to PS-MPs induced reduced sperm quality, elevated sperm abnormalities, and increased levels of autophagy and apoptosis. Mechanistically, PS-MPs activated the MAP3K1/p38/c-fos pathway via the transcription factor FOXA1, thereby inducing the autophagy and apoptosis of spermatogonia. Collectively, this study provides direct human evidence that MP accumulation in semen is associated with impaired sperm quality, particularly in individuals with certain lifestyle factors such as frequent PT use. Moreover, our findings further demonstrate the potential reproductive toxicity of MPs and, for the first time, elucidate the critical role of the FOXA1/MAP3K1/p38 cascade in PS-MPs-mediated decline in sperm quality.
Graphical abstract
Journal Article
Tunable topological phases in nanographene-based spin-1/2 alternating-exchange Heisenberg chains
Unlocking the potential of topological order in many-body spin systems has been a key goal in quantum materials research. Despite extensive efforts, the quest for a versatile platform enabling site-selective spin manipulation, essential for tuning and probing diverse topological phases, has persisted. Here we utilize on-surface synthesis to construct spin-1/2 alternating-exchange Heisenberg chains by covalently linking Clar’s goblets—nanographenes each hosting two antiferromagnetically coupled spins. Using scanning tunnelling microscopy, we exert atomic-scale control over chain lengths, parities and exchange-coupling terminations, and probe their magnetic response via inelastic tunnelling spectroscopy. Our investigation confirms the gapped nature of bulk excitations in the chains, known as triplons. Their dispersion relation is extracted from the spatial variation of tunnelling spectral amplitudes. Depending on the parity and termination of chains, we observe varying numbers of in-gap spin-1/2 edge excitations, reflecting the degeneracy of distinct topological ground states in the thermodynamic limit. By monitoring interactions between these edge spins, we identify the exponential decay of spin correlations. Our findings present a phase-controlled many-body platform, opening avenues toward spin-based quantum devices.
Scanning probe microscopy experiments realize the alternating-exchange spin-1/2 Heisenberg model via magnetic nanographene chains. They control odd- to even-Haldane phase transitions and monitor spin–spin correlations and triplon dispersion.
Journal Article
Objects of imagination : contemporary Arab ceramics
Thirty-six artists from the Arab world experiment with the ceramic medium. Born as an initiative of the Kinda Foundation for Contemporary Arab Art, 'Objects of Imagination' is a unique collaboration of 36 artists from across the Arab World, in which both traditional and innovative techniques were used to create a body of ceramic artworks.
Book
An Assessment of the Strength and Physical Properties of Edible Tableware from Flax Seed and Flaxseed Cake
Alternatives to traditional disposable plastic tableware are constantly sought. The aim of the study was to assess the possibility of using oilseeds and their press cakes for the production of edible tableware. Edible vegan plates (P) and bowls (B) were produced. The basic ingredients used for production were flax seeds (S) or flax press cake (C). Plates made using press cakes under a pressure of 3 kg deformed to a lesser extent than those containing seeds. However, they were more susceptible to crumbling during shaking. The colour of the tableware made on the basis of flax press cakes was lighter and was characterised by a higher chromaticity in the yellow and red direction. Significantly higher water absorption was characteristic of the tableware in which flax press cakes were used instead of flax seeds. The lowest water absorption (17.14%) after 30 min of soaking was recorded for the PS sample. After the test simulating the use of the tableware, a significant reduction in strength was observed overall (except for the PS test). The panelists rated the consistency and palatability of the PS, BS and PC tests very similarly. The highest overall acceptability was noted for the BS and PC tests. In conclusion, the development of edible bowls and plates made from flax seeds or flaxseed cake is an alternative solution for the production of environmentally friendly tableware.
Journal Article
Minding the store : a big story about a small business
\"An illustrated history of the iconic New York City dish store Fishs Eddy\"-- Provided by publisher.
BOOK
A sentinel goblet cell guards the colonic crypt by triggering Nlrp6-dependent Muc2 secretion
Innate immune signaling pathways contribute to the protection of host tissue when bacterially challenged. Colonic goblet cells are responsible for generating the two mucus layers that physically separate the luminal microbiota from the host epithelium. Analysis of colonic tissues from multiple mouse strains allowed us to identify a \"sentinel\" goblet cell (senGC) localized to the colonic crypt entrance. This cell nonspecifically endocytoses and reacts to the TLR2/1, TLR4, and TLR5 ligands by activating the Nlrp6 inflammasome downstream of TLR- and MyD88-dependent Nox/Duox reactive oxygen species synthesis. This triggers calcium ion–dependent compound exocytosis of Muc2 mucin from the senGC and generates an intercellular gap junction signal; in turn, this signal induces Muc2 secretion from adjacent goblet cells in the upper crypt, which expels bacteria. Thus, senGCs guard and protect the colonic crypt from bacterial intruders that have penetrated the inner mucus layer.
Journal Article