Photochemical [2 + 2] Cycloaddition Enables the Synthesis of Highly Thermally Stable and Acid/Base-Resistant Polyesters from a Nonpolymerizable α,β-Conjugated Valerolactone.

We report a simple strategy to transform a nonpolymerizable six-membered α,β-conjugated lactone, 5,6-dihydro-2-pyran-2-one (), into polymerizable bicyclic lactones via photochemical [2 + 2] cycloaddition. Two bicyclic lactones, and , were obtained by the photochemical [2 + 2] cycloaddition of tetramethylethylene and . Ring-opening polymerization (ROP) of and catalyzed by diphenyl phosphate (DPP), La[N(SiMe)], and 1--butyl-4,4,4-tris(dimethylamino)-2,2-bis[tris (dimethylamino) phosphoranylide-namino]-2λ, 4λ-catenadi(phosphazene) (Bu-P) were conducted.

Thermally Stable and Chemically Recyclable Poly(ketal-ester)s Regulated by Floor Temperature.

Chemical recycling to monomers (CRM) offers a promising closed-loop approach to transition from current linear plastic economy toward a more sustainable circular paradigm. Typically, this approach has focused on modulating the ceiling temperature () of monomers. Despite considerable advancements, polymers with low often face challenges such as inadequate thermal stability, exemplified by poly(γ-butyrolactone) (PGBL) with a decomposition temperature of ∼200 °C.

[Clinical observational study on the treatment of oligozoospermia with Shizi Sanhua decoction combined with Nuoyu].

Objective: To study the clinical therapeutic effect as well as drug effectiveness and safety of Shizi Sanhua decoction combined with Nuoyu in the treatment of oligozoospermia in men.

Methods: 102 patients with oligozoospermia diagnosed at Longhua Hospital of Shanghai University of Traditional Chinese Medicine from February 2022 to March 2023 were selected and randomly divided into 3 groups. The treatment group was treated with Shizi Sanhua Decoction + Nuoyu; the traditional Chinese medicine group was treated with Shizi Sanhua Decoction; and the Nuoyu nutrient group was treated with Nuoyu nutrient.

Enabling Closed-Loop Circularity of "Non-Polymerizable" α, β-Conjugated Lactone Towards High-Performance Polyester with the Assistance of Cyclopentadiene.

Chemical recycling of polymers to monomers presents a promising solution to the escalating crisis associated with plastic waste. Despite considerable progress made in this field, the primary efforts have been focused on redesigning new monomers to produce readily recyclable polymers. In contrast, limited research into the potential of seemingly "non-polymerizable" monomers has been conducted.

Genome-Wide Identification and Transcriptional Expression Profiles of in the Barley ( L.) Pan-Genome.

The gene family protein phosphatase 2C (PP2C) is related to developmental processes and stress responses in plants. Barley ( L.) is a popular cereal crop that is primarily utilized for human consumption and nutrition.

Rational design and synthesis of hollow Fe-N/C electrocatalysts for enhanced oxygen reduction reaction.

Herein, we report a one-step synthesis of a hollow Fe-N/C catalyst via a hard-templating strategy, in which FeNx sites are well dispersed on the carbon sphere. In particular, we found an optimal iron ratio on the catalyst surface for an enhanced alkaline oxygen reduction reaction (ORR). The catalyst with a high specific surface area of 311.

Genome Sequence of Sulfide-Dependent Denitrification Bacterium sp. Strain XSG, Isolated from Marine Sediment.

We report the draft genome sequence of sp. strain XSG, isolated from a marine sediment. The genome is 3,047,478 bp long with a GC content of 68.

CLP gene family, a new gene family of Cotesia vestalis bracovirus inhibits melanization of Plutella xylostella hemolymph.

Polydnaviruses (PDVs) are obligatory symbionts of parasitoid wasps and play an important role in suppressing host immune defenses. Although PDV genes that inhibit host melanization are known in Microplitis bracovirus, the functional homologs in Cotesia bracoviruses remain unknown. Here, we find that Cotesia vestalis bracovirus (CvBV) can inhibit hemolymph melanization of its host, Plutella xylostella larvae, during the early stages of parasitization, and that overexpression of highly expressed CvBV genes reduced host phenoloxidase activity.

Increased Serum Calcium Level Promotes the Risk of Lymph Node Metastasis in Endometrial Cancer.

Purpose: The early predictive values of diagnostic markers for lymph node metastasis (LNM) in endometrial cancer (EC) are still unclear at present. The purpose of this study is to explore the relationship between serum calcium and LNM in EC.

Methods: We identified all patients with EC who underwent surgery between January 2012 and December 2016.

[Variations in the mean trophic level and large fish index of fish community in Haizhou Bay, China].

Based on the bottom trawl surveys in spring (May) and in autumn (September to October) from 2011 to 2017 (except 2012) in Haizhou Bay, variations in the mean trophic levels (MTL) and large fish index (LFI) of fish community were examined to understand the changes of fish community structure in Haizhou Bay. The results showed that the dominant fish species were Hexagrammos otakii, Enedrias fangi, Syngnathus acus, Pseudosciaena polyactis and Saurida elongata, which had obvious seasonal variation. The mean trophic level of fish community varied significantly among different years and seasons.

Parasitic insect-derived miRNAs modulate host development.

Parasitic wasps produce several factors including venom, polydnaviruses (PDVs) and specialized wasp cells named teratocytes that benefit the survival of offspring by altering the physiology of hosts. However, the underlying molecular mechanisms for the alterations remain unclear. Here we find that the teratocytes of Cotesia vestalis, an endoparasitoid of the diamondback moth Plutella xylostella, and its associated bracovirus (CvBV) can produce miRNAs and deliver the products into the host via different ways.

Gallic acid-assisted synthesis of Pd uniformly anchored on porous N-rGO as efficient electrocatalyst for microbial fuel cells.

The sluggish kinetic rate-limiting oxygen reduction reaction (ORR) at the cathode remains the foremost issue hindering the commercialization of microbial fuel cells (MFCs). Utilization of the effect of micromolecule conjugation and the synergistic effect between Pd nanoparticles and N-rGO (nitrogen-doped reduced graphene oxide) to stabilize a precious metal onto carbon materials is a promising strategy to design and synthesize highly efficient cathode catalysts. In this study, gallic acid is used to facilitate the coupling of palladium (Pd) with N-rGO to form GN@Pd-GA via a simple hydrothermal process.

Eye Acupuncture Treatment for Stroke: A Systematic Review and Meta-Analysis.

There were applications of eye acupuncture for stroke patients. Unfortunately, similar to many other Traditional Chinese Medicine (TCM) treatments, it lacks comprehensive evaluation and system review for its effect and safety. Objective.

Effects of partial portal vein arterialization on liver regeneration after hepatectomy in minipigs with obstructive jaundice.

Background: Hilar cholangiocarcinoma is a malignant tumor that is difficult to cure. The aim of this study was to observe the effects of flow-controlled partial portal vein arterializations (PPVA) on liver regeneration after hepatectomy in minipigs with chronic obstructive jaundice.

Methods: Eight minipigs were made into chronic obstructive jaundice models.