Bacterial Population Changes during the Degradation Process of a Lactate (LA)-Enriched Biodegradable Polymer in River Water: LA-Cluster Preferable Bacterial Consortium.

The lactate-based polyester poly[lactate (LA)--3-hydroxybutyrate (3HB)], termed LAHB, is a highly transparent and flexible bio-based polymeric material. There are many unknowns regarding its degradation process in riverine environments, especially the changes in bacterial flora that might result from its degradation and the identities of any LAHB-degrading bacteria. LAHB were immersed in the river water samples (A and B), and LAHB degradation was observed in terms of the weight change of the polymer and the microscopic changes on the polymer surfaces.

1,2-Carbopentafluorophenylation of Alkynes: The Metallomimetic Pull-Push Reactivity of Tris(pentafluorophenyl)borane.

We report the novel single-step 1,2-dicarbofunctionalization of an arylacetylene with an allylsilane and tris(pentafluorophenyl)borane [B(C F ) ] involving C-C bond formation with C-H bond scission at the β-position to the silicon atom of an allylsilane and B→C migration of a C F group. The 1,2-carbopentafluorophenylation occurs smoothly without the requirement for a catalyst or heating. Mechanistic studies suggest that the metallomimetic "pull-push" reactivity of B(C F ) imparts consecutive electrophilic and nucleophilic characteristics to the benzylic carbon of the arylacetylene.

A flavanone derivative from the Asian medicinal herb (Perilla frutescens) potently suppresses IgE-mediated immediate hypersensitivity reactions.

Perilla frutescens is a dietary leafy herb consumed as a traditional Japanese condiment as well as used for Chinese medicine with anti-inflammatory activity. Here we report a hitherto-unrecognized P. frutescens phytochemical that potently suppresses IgE-mediated type I hypersensitivity reactions.

The effect of residual osteomyelitis at the resection margin in patients with surgically treated diabetic foot infection.

The appropriate antibiotic treatment of surgically resected diabetic foot osteomyelitis is controversial. We conducted a retrospective cohort study to evaluate the prognostic impact of residual osteomyelitis at the surgical margin of surgically resected diabetic foot osteomyelitis, and to assess the effectiveness of postoperative antibiotic therapy for residual osteomyelitis after surgical resection of infected bone. Of the 111 patients included in the study, 39 (35.

Laryngeal myxoma.

Myxoma is a rare benign tumor, and occurs most commonly in the mandible and maxilla in the head and neck region. Myxoma of the larynx is extremely rare and is frequently misdiagnosed as a vocal polyp. We present the first female case of myxoma on a vocal cord and review the literature on this subject.