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A contorted hexabenzocorone (HBC) mesogen based epoxy was synthesized and characterized for high thermal stability and thermal conductivity. Since HBC has a nano‐graphene like structure, which would have strong pi–pi interactions, it was expected that HBC epoxy would have superior heat resistance and thermal conductivity. Based on this hypothesis, HBC containing four epoxy groups at edges was synthesized and confirmed by NMR and mass spectrum. HBC epoxy was cured with diaminophenolsulfone and their thermal stability and thermal conductivity were investigated. As expected, the decomposition of 5 wt% occurred at 323.44°C, and thermal conductivity was 0.32 W/mK where the general thermal conductivity of epoxy resins is around 0.2 W/mK. Such enhancement of thermal properties would be explained by the formation of pi–pi stacking of HBC mesogens. Epoxy groups were introduced to contorted hexabenzocorone (HBC) structure for high heat resistance and thermal conductivity. The HBC epoxy was cured by diaminophenylsulfone at 170°C for 2 h. The Td(5 wt%) and thermal conductivity of the cured HBC epoxy were 323.44°C and 0.32 W/mK, respectively. Such high thermal stability and conductivity are originated from pi–pi stacking of HBC mesogens.

Objective: We investigated the incidence of sensorineural hearing loss (SNHL) after chronic otitis media (COM) surgery and determined the associated factors.Methods: Data were collected via retrospective medical chart review.Results: Of the 192 patients, 82 underwent tympanoplasty, 26 underwent canal wall up mastoidectomy with tympanoplasty, and 84 underwent canal wall down mastoidectomy with tympanoplasty. After surgery, the average air conduction (AC) hearing threshold improved significantly, from 125 to 1000 Hz, but the average high-frequency AC and bone conduction (BC) hearing thresholds deteriorated significantly. In 21 (11%) cases, the BC hearing threshold worsened by more than 15 dB at 4000 Hz. When we compared these 21 cases to patients in whom hearing was preserved, the former group was found to be significantly younger and had a higher frequency of cholesteatomatous otitis media. However, when comparing the severity of inflammation in patients with temporal bone computed tomography, there was no significant difference between the 2 groups.Conclusions: High-frequency SNHL may develop after surgery to treat COM, especially in young patients with cholesteatoma.

Background: To the best of our knowledge, this is the first report of female genital system infiltration of T-cell lymphoma in veterinary literature. Case presentation: A 1.5-year-old, intact female Golden Retriever was referred due to melena and hyporexia that lasted for three weeks. Fever (40.5℃), tachycardia, tachypnoea, pale mucous membranes, and purulent vaginal discharge were identified on physical examination. Blood analyses revealed leucocytosis, anaemia, hypoalbuminemia, and increased lactate and C-reactive protein levels. On abdominal radiography, the small intestine was moderately deviated because of an oval-shaped mass (13 cm × 8.7 cm) located in the mid-abdomen. An enlarged tubular-shaped structure that had the opacity of soft tissue located in dorsal to the bladder to the middle of the abdomen, and an oval-shaped mass (5.28 cm × 3.26 cm), which was suspected to be a medial iliac lymph node located at the sixth to seventh lumbar level. Abdominal ultrasonography revealed gas and fluid in the lumen of the uterine horn with a severely thickened wall, round enlarged lymph nodes around the genitourinary system, and free fluid in the abdominal cavity. Based on these results, pyometra was suspected, and an exploratory laparotomy was performed for ovariohysterectomy. The resected ovary and uterus were macroscopically hypertrophied. Histopathological examination of the ovary and uterus revealed neoplastic proliferation of large round cells with strong immunoreactivity for CD3, indicating T-cell lymphoma. Therefore, the young dog was diagnosed with genital lymphoma. Conclusions: The present report describes T-cell lymphoma infiltrating the uterus and ovaries in a young dog, which is rarely diagnosed and could aid in the differential diagnosis of genital diseases in young dogs.

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