Excited and Ionized States of p-Benzoquinone and Its Anion Radical: SAC-CI Theoretical Study

Excited and ionized states of p-benzoquinone (p-BQ) and the ground and excited states of its anion radical were studied by the SAC (symmetry adapted cluster)/SAC-CI (configuration interaction) method. Calculated ionization energies were in good agreement with the experimental ionization spectra, and the ionization peaks up to ca. 20 eV were assigned. The lowest four ionized states were calculated to be n

Lipomatous Pseudohypertrophy of the Pancreas Taking the Form of Huge Massive Lesion of the Pancreatic Head

A 70-year-old woman presented with hypogastric pain. Computed tomography and magnetic resonance imaging revealed a retroperitoneal tumor 18.0 cm in diameter with fatty tissue density, ventrally compressing the pancreatic head. We suspected a well-differentiated liposarcoma compressing the pancreas. At laparotomy, the tumor mass was the size of an infant's head; its center was located in the area corresponding to the pancreatic uncus. It was continuous with the pancreatic parenchyma through a poorly demarcated border, and we resected as much of the tumor mass as possible while conserving the pancreatic capsule. Histopathological examination indicated lipomatous pseudohypertrophy of the pancreas with proliferation of mature fatty tissue as the main constituent. At the periphery, islands of acinar tissue were retained among the fatty infiltration, which also contained branches of the pancreatic duct and islets of Langerhans. Previous reports have stated that this disorder only causes fatty replacements throughout the pancreas or in the pancreatic body and tail; however, in this patient, imaging and macroscopic examination revealed no fatty replacements in the pancreatic body and tail. We report this case, which we consider extremely rare, along with a brief review of the literature

Ground and excited states of singlet, cation doublet, and anion doublet states of o-benzoquinone: A theoretical study

The singlet excited states and doublet ionized/electron-attached states of o-benzoquinone (o-BQ) were studied by the symmetry adapted cluster (SAC) / SAC-configuration interaction (SAC-CI) method, and the corresponding spectral bands were assigned. The calculated transition energies reasonably reproduced the experimental spectra with the mean error of about 0.2 eV, except for the 1 1A1 states, whose disagreement may be attributed to involvement of the shoulder peak of this state in the intense peak at approximately 6.2 eV. For the singlet states, the lowest four excited states were assigned to n+-ð+ * (1B1), n--ð+ * (1A2), ð--ð+ * (1B2), and ð+-ð+ * (1A1) in order of increasing energy, and the intense band at approximately 6.2 eV in the experimental spectra was assigned to the 1B2 state in our calculations. For the cation doublet states, the lowest four states were assigned to n+ (2A1), ð- (2A2), n- (2B2), and ð+ (2B1) in order of increasing energy. Shake-up ionized states appeared in the energy region higher than 16 eV. For the anion doublet states, the ground state was 2B1, and five valence excited states were calculated within 4.0 eV above the anion ground state. The adiabatic electron affinity was calculated to be 1.63 eV, which is in very good agreement with the corresponding experimental value (1.62 eV). The use of Koopmans ’ theorem does not reproduce this energy order for either the singlet or the doublet states. We showed that, as in the case of p-BQ (J. Phys. Chem. A 2002, 106, 3838), electron correlation is essential in the description of the excited states of o-BQ. 1

Laparoscopic versus Open stoma creation: A retrospective analysis

Objectives: This study aimed to compare open stoma (OS) creation with laparoscopic stoma (LS) creation considering the operation time, blood loss, time of oral intake, and complications. We also compared multiport LS and single-incision laparoscopic stoma (SILS) creation. Methods: We reviewed the demographic data, diagnosis, indications, operation time, blood loss, time of oral intake, operative procedure, and complications of 50 patients who underwent stoma creation between April 2014 and April 2016. Results: The mean blood loss was significantly lower in the LS group (7.85±18.4 ml) than in the OS group (38.1±73.2 ml; P=0.02). There were no statistical differences between the groups in terms of the operation time (LS, 72.1±32.7 min; OS, 61.2±31.2 min; P=0.23) or time of oral intake (LS, 1.0±0 days; OS, 1.91±2.71 days; P=0.17). Peristomal skin problems occurred in 11 patients (47.8%) in the OS group and 5 patients (18.5%) in the LS group. There were no statistically significant differences between the SILS and multiport LS groups, considering the operation time, amount of bleeding, and time of oral intake. Conclusions: LS is comparable with OS in terms of operation time and time of oral intake and may cause lesser blood loss. Considering its advantages, LS is a useful approach for patients requiring biopsies or intra-abdominal inspection. SILS is a minimally invasive technique, suitable for patients in whom the stoma site is preoperatively decided