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Micro/nanostructured goethite (α-FeOOH) was synthesized by a low-temperature water bath method based on the reaction of urea and FeSO4•7H2O at 95 °C. It has been shown that the as-prepared α-FeOOH consists of nearly spherical particles with about 0.5–1 μm in diameter. The microsized α-FeOOH particles are urchin-like in morphology and composed of nanosized leaf-like objects, with about 150–200 nm in length and about 30–50 nm in width, in radial arrangement, showing high specific surface area (∼118 m2/g). The formation of such urchin-like α-FeOOH could be described by a two-step process, or formation of spherical particles, and ethylene glycol-adsorption induced preferential growth of nanoleaves on the preformed spherical particles. Importantly, such micro/nanostructured α-FeOOH has exhibited much higher photocatalytic activity to the organic pollutants, such as Rhodamine 6G, and better re-usable performances than the goethite nanorod powders, exhibiting the good application potential in the environmental treatment. This study could provide a useful material for environmental pollution treatment.
We report a modified surgical technique for transplanting an ectopic, lingual thyroid to the submandibular space, in order to maintain thyroid function while relieving obstructive symptoms.
A 52-year-old woman complained of progressive dysphagia and dyspnoea. Ectopic lingual thyroid tissue was diagnosed. The ectopic thyroid gland was transplanted into the submandibular region via a lateral pharyngeal approach. A random muscle pedicle was prepared to provide a vascular supply to the transposed gland.
Twelve-month follow up confirmed the survival of the transplanted thyroid gland, with preserved thyroid function.
Surgical transplantation of a lingual thyroid to the submandibular region offers an alternative treatment method for this anomaly, which avoids the need for resection and lifelong thyroxine replacement.
The Mesolithic — as the ‘time in between’ — raises issues of definition, the more so as chronology is refined and the abruptness of environmental change at the end of the glaciation becomes clearer. This clarification of an unusual regional sequence is an instance.
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