• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.12 no.8
• /
• pp.3532-3540
• /
• 2011

In order to improve flux of PTMSP/PDMS dense membrane, PTMSP/PDMS-PEI composite membrane with PEI support was prepared by phase inversion process and dip coating. These membranes were evaluated in terms of the removal of volatile organic compounds such as PCE, TCE, chloroform, 1,1,1-trichloroethane from wastewater by pervaporation. The selectivity and flux of PTMSP/PDMS dense membranes was in the range of 216.2 to 2394.4 and 244.3 to 428.2g/m2h, respectively. And pervaporation property of PTMSP/PDMS-PEI composite membrane was in the range of 215.5 to 2404.2 and 390.4 to 728.6g/m2h, respectively. PTMSP/PDMS-PEI composite membrane has remarkably greater flux than dense membranes with similar selectivity. It was possible for polymeric membranes used in this study to remove PCE selectively which is dissolved small quantity in water among other separable solutes. PTMSP/PDMS-PEI composite membrane showed the best performances among the silicone polymeric membranes, and has better durability and mechanical strength than dense membranes. PTMSP/PDMS-PEI composite membrane should be a useful candidate for the removal of volatile organic compounds dissolved in wastewater.

• Journal of Veterinary Clinics
• /
• v.32 no.1
• /
• pp.28-35
• /
• 2015

Aim of this study is demonstrate the feasibility of Laparoscopic gastrostomy (LG) tube placement in dogs by comparing with percutaneous endoscopic gastrostomy (PEG) tube placement, based on operative time, complications and gastro-peritoneal adhesion evaluation. Eight intact male beagle dogs were used in this study. Tri-Funnel Replacement Gastrostomy tube (Bard Inc., USA) of 20 Fr was used for LG technique and PEG kit (Ponsky "Pull" PEG Kit$^{(R)}$, Bard Inc., USA) with soft silicone retention dome consisting of a 20 Fr gastrostomy tube was used. Feeding via gastrostomy tube was performed in two weeks, maintenance energy requirement (MER) divided into 3 separate feeding. LG and PEG were evaluated at intraoperative, postoperative and postmortem period. Mean operative time for the PEG group was significantly shorter when compared with the LG group (p < 0.05). Successful maintenance of gastrostomy tube was confirmed in all dogs. Gastric and peritoneal wall adhesions were formed successfully in each group. The mean adhesion length (AL) and width (AW) were significantly larger in LG group compared with in PEG group (p < 0.05). The mean adhesion distance (AD) was not significantly different between two groups (p = 0.182). Consequently, LG is an effective minimally invasive, safe and easy to perform technique for providing enteral nutritional support in dogs.