12 research outputs found
A Postulate for Tiger Recovery: The Case of the Caspian Tiger
Recent genetic analysis has shown that the extinct Caspian Tiger (P. t. virgata) and the living Amur Tigers (P. t. altaica) of the Russian Far East are actually taxonomically synonymous and that Caspian and Amur groups historically formed a single population, only becoming separated within the last 200 years by human agency. A major conservation implication of this finding is that tigers of Amur stock might be reintroduced, not only back into the Koreas and China as is now proposed, but also through vast areas of Central Asia where the Caspian tiger once lived. However, under the current tiger conservation framework the 12 “Caspian Tiger States” are not fully involved in conservation planning. Equal recognition as “Tiger Range States” should be given to the countries where the Caspian tiger once lived and their involvement in tiger conservation planning encouraged. Today, preliminary ecological surveys show that some sparsely populated areas of Central Asia preserve natural habitat suitable for tigers. In depth assessments should be completed in these and other areas of the Caspian range to evaluate the possibility of tiger reintroductions. Because tigers are a charismatic umbrella species, both ecologically and politically, reintroduction to these landscapes would provide an effective conservation framework for the protection of many species in addition to tigers. And for today’s Amur Tigers this added range will provide a buffer against further loss of genetic diversity, one which will maintain that diversity in the face of selective pressures that can only be experienced in the wild
Risk factors of postoperative prolonged ileus after colorectal cancer surgery
OBJECTIVE. The authors identified independent risk factors of postoperative prolonged ileus after colorectal cancer surgery. MATERIAL AND METHODS. Multivariate logit regression analysis was made in order to reveal independent risk factors of prolonged ileus. RESULTS. The frequency of prolonged ileus cases consisted of 13 %. The authors detected three independent risk factors such as body mass index higher than 25 kg/m² (p=0,033), taking of opioid analgetics (p=0,022) and left colon flexure mobilization (p=0,047) in multivariate statistical analysis. CONCLUSIONS. Postoperative prolonged ileus was the frequent complication in colorectal cancer surgery. There is a possibility to identify the group of patients who exposed to risk of occurrence of prolonged postoperative ileus due to application of revealed risk factors
Numerical model of electron injector for a traveling-wave tube based on a coupled-cavity chain
SIDE-TO-END ANASTOMOSIS IN LOW ANTERIOR RECTAL RESECTION
The authors have launched a prospective randomized study aimed to make a comparison of functional results of formation of straight coloanal (control group) and side-to end (main group) anastomosis in case of low anterior rectal resection since 2012. Each group consisted of 40 patients undergoing operation concerning uncomplicated rectal cancer of medium-ampullar section of rectum. It was noted that patients of the main group had lower stool frequency in postoperative period. A function of the interior sphincter was less damaged and the rate of compliance of rectum was high