A composite air electrode consisting of Ketjenblack carbon (KB) supported amorphous manganese oxide (MnOx) nanowires, synthesized via a polyol method, is highly efficient for the oxygen reduction reaction (ORR) in a Zn-air battery. The low-cost and highly conductive KB in this composite electrode overcomes the limitations due to low electrical conductivity of MnOx while acting as a supporting matrix for the catalyst. The large surface area of the amorphous MnOx nanowires, together with other microscopic features (e.g., high density of surface defects), potentially offers more active sites for oxygen adsorption, thus significantly enhancing ORR activity. In particular, a Zn-air battery based on this composite air electrode exhibits a peak power density of ∼190 mW/cm2, which is far superior to those based on a commercial air cathode with Mn3O4 catalysts.

Gastric bypass is considered by many to be the gold standard for surgical treatment of obesity. Gastric bypass was a natural evolution from gastric operations that were used for the treatment of peptic ulcer disease. Gastric bypass, first described in 1967, has undergone many modifications. It presently exists as a hybrid operation. Gastric bypass operation has been extensively scrutinized and evaluated against other operations for the treatment of obesity. Co-morbidities due to severe obesity are usually ameliorated or arrested after the weight loss from gastric bypass. Gastric bypass operation is now being performed with a perioperative morbidity of less than 10%. The average percentage excess weight loss with gastric bypass is 70%. The success rate, defined as 50% excess weight loss after at least 2 years of follow-up, is 85%. The metabolic deficiencies of gastric bypass are controllable with supplemental intake. This report with special references to the Fobi pouch operation, a modification of gastric bypass done by the author, presents the evolution, modifications, risk, outcome, and future trends of gastric bypass for treatment of obesity.

Because of the high incidence of gallbladder disease even with negative preoperative findings in morbidly obese patients and the lack of significant morbidity with cholecystectomy in experienced hands, routine cholecystectomy at the time of the weight loss operation is justified.

Revision of short-limb gastric bypass to DRYGBP usually enhances weight loss but at a cost of an increased incidence of protein malnutrition.

BE is an uncommon complication of TBVGBP. Infection, previous bariatric operations and surgical technique play a role in BE. BE is best managed by endoscopic removal but can be treated expectantly or by open surgical intervention. Band removal without replacement or revision to DRYGBP may result in weight regain.

No abstract

The Fobi-Pouch operation (FPO) for obesity is the product of clinical trials, more than 15 years of personal clinical experience and information gathered from publications, scientific meetings, and personal communications with other bariatric surgeons. The essence of the operation is the small vertical pouch (< 25 ml), an externally supported stoma, the interposed Roux-en-Y limb, the gastrostomy and the bypassed stomach marker to facilitate percutaneous transabdominal access to the bypassed segment. Patients undergoing this operation are usually given bowel prep the day before the operation, admitted the morning of the operation and started on subcutaneous heparin, prophylactic antibiotic and hydration. Antithrombotic sequential compression devices are regularly used. The hospital stay is usually 4 days. Our results and those of other surgeons who have used this modification substantiate the rationale for the modifications entailed in the FPO. Our longer-term experience and results are being compiled for publication.

In order to clarify infestation pattern for the encysted larvae of digenetic trematodes from fresh-water fishes, this survey was carried out from March to September, 1983. A total of 380 fishes of 32 species were collected with netting at the three reaches, upper, middle and lower in Mangyeong riverside area. After the fishes were dissected into small scraps, they were pressed under cover glass and examined for the presence of those of digenetic trematodes with a microscope. The results obtained were as follows: Out of a total of 380 fishes inspected, 320 fishes (84 %) from 31 species were found positive with digenetic trematode metacercariae; more than 10 species of the metacercariae were detected in Pseudorasbora parva; Gnathopogon majimae, Microphysogobio yaluensis, Cultriculus eigenmanni and Gnathopogon coreanus (more than 8 species); Aphyocypris chinensis(8 species) and etc. respectively. Clonorchis sinensis metacercariae were found positive from 93 fishes (25 %) from 12 species detection rates in other species of digenetic trematode metacercariae from various fishes were; Exorchis oviformis, 261 fishes (57 %) from 28 species; Cyathocotyle orientalis, 47 fishes (12 %) from 12 species; Metorchis orientalis, 21 fishes (6 %) from 12 species; Metagonimus yokogawai, 164 fishes (43 %) from 26 species; Pseudexorchis major, 71 fishes (19 %) from 18 species; Metacercaria hasegawai, 77 fishes (20 %) from 25 species; Centrocestus armatus, 24 fishes (6 %) from 7 species; Echinochasmus japonicus, 2 fishes (0.5 %) from 2 species, and unidentified species, 34 fishes (9 %) from 15 species respectively. The sums of average number of the encysted larvae of all species found in fish body/gram showed 83 in P. parva, Cobitis taenia (74.2), A. chinensis (28.5), Pseudoperilampus uyekii (26.6), G. majimae (19.6) and etc. respectively and the average peak number of each metacercaria in fish body/gram showed 21.7 C. sinensis, 24 E. oviformis, 15.3 M. orientalis and 6.1 E. japonicus in P. parva; 42.7 C. orientalis and 25.1 M. yokogawai in C. taenia; 8.3 C. armatus and 8.3 M. hasegawai in P. uyekii; 6.3 P. major in Carassius carassius, and 2.9 unidentified species in G. majimae respectively.