Risk stratification of patients with gastric lesions indefinite for dysplasia.

Background/aims: There are no definite guidelines for the management of gastric lesions diagnosed as indefinite for dysplasia (IND) by endoscopic forceps biopsy (EFB). Therefore, this study aimed to evaluate the clinical outcomes of gastric IND and predictive factors for gastric neoplasm.

Methods: This study included 457 patients with a first diagnosis of gastric IND by EFB between January 2005 and December 2013.

The relationship between local recurrence and positive lateral margin after en bloc resection of colorectal neoplasm.

Background: The factors associated with recurrence of colonic neoplasm after endoscopic resection with a positive lateral margin are not well known. Thus, we evaluate the relationship between recurrence and positive lateral margin after endoscopic en bloc resection of colorectal neoplasm.

Methods: A retrospective review of 9302 patients who underwent colonic endoscopic resection from January 2008 to January 2015.

Efficacy of 3 fine-needle biopsy techniques for suspected pancreatic malignancies in the absence of an on-site cytopathologist.

Background And Aims: EUS-guided fine-needle aspiration/biopsy (EUS-FNA/B) has a high diagnostic accuracy for pancreatic tumors. Most reports have focused on the diagnostic yield of cytology or histology; the ability of various FNA/B techniques to obtain an adequate mass of cells or tissue has rarely been investigated.

Methods: Patients with suspected pancreatic malignancy underwent EUS-FNB using a 22-gauge ProCore needle by either the stylet slow-pull-back technique (group A), conventional negative suction after stylet removal (group B), or non-suction after stylet removal (group C) in the absence of an on-site cytopathologist.

Etomidate Sedation for Advanced Endoscopic Procedures.

Background And Study Aim: Although propofol is widely used for sedation for endoscopic procedures, concerns remain regarding cardiopulmonary adverse events. Etomidate has little effect on the cardiovascular and respiratory systems, but patient satisfaction analysis is lacking. We compared the efficacy and safety of balanced propofol and etomidate sedation during advanced endoscopic procedures.

Is the Isolated-Tip Needle-Knife Precut as Effective as Conventional Precut Fistulotomy in Difficult Biliary Cannulation?

Background/aims: Needle-knife precut fistulotomy (NK-F) is a well-known freehand technique for difficult biliary cannulation (DBC). Another approach involves the use of Iso-Tome, a modified precutting device with an insulated needle tip to prevent direct thermal injury. This comparative study aimed to evaluate the efficacy of the Iso-Tome precut (IT-P) compared to that of NK-F for DBC.

Clinical Effectiveness of Submucosal Injection with Indigo Carmine Mixed Solution for Colon Endoscopic Mucosal Resection.

Background/aims: Submucosal injection with indigo carmine mixed solution can improve the delineation of colorectal neoplasia during endoscopic mucosal resection (EMR). Thus, the aim of this study was to evaluate the efficacy of submucosal injection with indigo carmine mixed solution during EMR of colorectal neoplasia.

Methods: This was a prospective, randomized, controlled study of a total of 212 neoplastic colon polyps (5-20 mm) subjected to EMR in a single tertiary university hospital.

Efficacy of midazolam- versus propofol-based sedations by non-anesthesiologists during therapeutic endoscopic retrograde cholangiopancreatography in patients aged over 80 years.

Background And Aim: As society ages, the need for endoscopic retrograde cholangiopancreatography (ERCP) is increasing. This prospective comparative study evaluated the safety and efficacy of midazolam- versus propofol-based sedations by non-anesthesiologists during therapeutic ERCP in patients over 80 years of age.

Methods: A total of 100 patients over 80 years of age who required therapeutic ERCP were enrolled and randomly received midazolam + fentanyl (MF group) or propofol + fentanyl (PF group) sedation.

Thermoelectric properties of in-situ plasma spray synthesized sub-stoichiometry TiO.

The thermoelectric properties of sub-stoichiometric TiO deposits produced by cascaded-plasma spray process are investigated from room-temperature to 750 K. Sub-stoichiometric TiO deposits are formed through in-situ reaction of the TiO within the high temperature plasma flame and manipulated through introduction of varying amounts of hydrogen in the plasma. Although the TiO particles experience reduction within plasma, it can also re-oxidize through interaction with the surrounding ambient atmosphere, resulting in a complex interplay between process conditions and stoichiometry.

Efficacy and Safety of Therapeutic Endoscopic Retrograde Cholangiopancreatography in the Elderly Over 80 Years.

Background/aims: Concern regarding the safety and efficacy of therapeutic endoscopic retrograde cholangiopancreatography (ERCP) in elderly patients is increasing as a result of the aging society. However, there are limited data, especially in the super-aged elderly. This study aimed to evaluate the efficacy and safety of therapeutic ERCP in patients ≥80 years of age.

Indolent metastatic squamous cell carcinoma of unknown primary in the intrathoracic lymph node: a case report and review of the literatures.

Metastatic squamous cell carcinoma from a cancer of unknown primary (CUP) affecting the intrathoracic lymph node is very rare. We reported a case of metastatic squamous cell carcinoma in the hilar and interlobar lymph node from a patient with CUP and reviewed the associated literature. Abnormal mass in the right hilar area was incidentally detected.

High current superconductivity in FeSe0.5Te0.5-coated conductors at 30 tesla.

Although high-temperature superconductor cuprates have been discovered for more than 25 years, superconductors for high-field application are still based on low-temperature superconductors, such as Nb(3)Sn. The high anisotropies, brittle textures and high manufacturing costs limit the applicability of the cuprates. Here we demonstrate that the iron superconductors, without most of the drawbacks of the cuprates, have a superior high-field performance over low-temperature superconductors at 4.

Development of off-on fluorescent probes for heavy and transition metal ions.

A carbonyl group was positioned between 1,8-naphthalimide and di-2-picolylamine (DPA) and played a key role of displaying fluorescence enhancements with heavy and transition metal (HTM) ions through increasing the oxidation potential of the fluorophore, blocking HTM ions from sterically interacting with the naphthalimide fluorophore, and by acting as a sacrificial donor.

Novel bi-nuclear boron complex with pyrene ligand: red-light emitting as well as electron transporting material in organic light-emitting diodes.

A novel boron complex bearing a pyrene ligand (CPB) was synthesized and introduced as the first example of a binuclear boron complex in organic light-emitting diodes. In the solid state, CPB2 exhibited strong red emission. In the devices, red emission with Commission International de L'Eclairage (CIE) coordinates of (0.

Elucidation of the structure of a highly active catalytic system for CO2/epoxide copolymerization: a salen-cobaltate complex of an unusual binding mode.

Salen-type ligands comprised of ethylenediamine or 1,2-cyclohexenediamine, along with an salicylaldehyde bearing a methyl substituent on its 3-position and a -[CR(CH(2)CH(2)CH(2)N(+)Bu(3))(2)] (R = H or Me) on its 5-position, unexpectedly afford cobalt(III) complexes with uncoordinated imines. In these complexes, two salen-phenoxys and two 2,4-dinitrophenolates (DNPs), which counter the quaternary ammonium cations, coordinate persistently with cobalt, while two other DNPs are fluxional between a coordinated and an uncoordinated state in THF at room temperature. The complexes of this binding mode show excellent activities in carbon dioxide/propylene oxide copolymerization (TOF, 8300-13,000 h(-1)) but with some fluctuation in induction times (1-10 h), depending on how dry the system is.

Generation of blue light-emitting zinc complexes by band-gap control of the oxazolylphenolate ligand system: syntheses, characterizations, and organic light emitting device applications of 4-coordinated bis(2-oxazolylphenolate) zinc(II) complexes.

Color-tunable Zn(II) complexes of the type Zn( N,O-OPh (OxZ)ArX) 2 ( 5), where the ligand consists of an oxazolylphenolate ion connected at the 4-position by a 2,4-substituted aryl functional group with X = NMe 2 a, OMe b, Ph c, Cl d, F 2 e, and CN f, were prepared. X-ray structural studies of 5a, 5b, and 5e showed that a zinc atom was positioned in a distorted tetrahedral coordination environment created by two oxazolylphenolate ligands with N,O-chelation. Hammet plots of absorption and emission maxima, respectively, in UV and photoluminescence (PL) spectra with respect to electron-donating and electron-withdrawing groups of the substituents indicate a direct correlation between the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) band gaps and electronic alterations at the ligand sites.