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Extremely High Mortality Rate after a Successful Gastrectomy for Cancer in Older Adults
Ciesielski, Maciej,Kruszewski, Wieslaw Janusz,Szajewski, Mariusz,Walczak, Jakub,Spychalska, Natalia,Szefel, Jaroslaw,Zielinski, Jacek The Korean Gastric Cancer Association 2019 Journal of gastric cancer Vol.19 No.2
Purpose: Poor physiological reserve for withstanding major cancer surgery in older adults is an important concern in the selection of patients for oncologic gastrectomy. The present study aimed to analyze mortality patterns among patients who underwent gastrectomy for cancer according to age groups. The primary outcomes of this study were early- and middleterm results: 30-day and 3-, 6-, 12-, and 36-month mortality rates. Materials and Methods: A retrospective review of 288 patients who underwent surgical resection for gastric cancer in two centers was carried out. Patients were stratified into four groups according to age: 29-50 years (group I, n=27), 51-65 years (group II, n=117), 66-75 years (group III, n=81), and 76-92 years (group IV, n=58). Statistical calculations focused on the differences in the survival rates between groups I and II as well as between groups II and IV. Results: The middle-aged patients (group II) had significantly better 3-year survival than either the youngest (group I) or the oldest patients (group IV). The 6-month mortality rates were 16.9% in group III and 29.3% in group IV. Two-thirds of the patients from groups III and IV who died between 2 and 6 months after surgery had an uneventful postoperative course. Conclusions: Age is an important prognostic factor of middle-term survival after gastrectomy for cancer. Geriatric assessment and better patient selection for major surgery for cancer are required to improve the outcome of gastrectomy for cancer in patients aged over 75 years.
Extremely High Mortality Rate after a Successful Gastrectomy for Cancer in Older Adults
Maciej Ciesielski,Wiesław Janusz Kruszewski,Mariusz Szajewski,Jakub Walczak,Natalia Spychalska,Jarosław Szefel,Jacek Zieliński 대한위암학회 2019 Journal of gastric cancer Vol.19 No.2
Purpose: Poor physiological reserve for withstanding major cancer surgery in older adults is an important concern in the selection of patients for oncologic gastrectomy. The present study aimed to analyze mortality patterns among patients who underwent gastrectomy for cancer according to age groups. The primary outcomes of this study were early- and middleterm results: 30-day and 3-, 6-, 12-, and 36-month mortality rates. Materials and Methods: A retrospective review of 288 patients who underwent surgical resection for gastric cancer in two centers was carried out. Patients were stratified into four groups according to age: 29–50 years (group I, n=27), 51–65 years (group II, n=117), 66–75 years (group III, n=81), and 76–92 years (group IV, n=58). Statistical calculations focused on the differences in the survival rates between groups I and II as well as between groups II and IV. Results: The middle-aged patients (group II) had significantly better 3-year survival than either the youngest (group I) or the oldest patients (group IV). The 6-month mortality rates were 16.9% in group III and 29.3% in group IV. Two-thirds of the patients from groups III and IV who died between 2 and 6 months after surgery had an uneventful postoperative course. Conclusions: Age is an important prognostic factor of middle-term survival after gastrectomy for cancer. Geriatric assessment and better patient selection for major surgery for cancer are required to improve the outcome of gastrectomy for cancer in patients aged over 75 years.
( Ziembinska A ),( S Ciesielski ),( A Gnida ),( S Abczy Ski ),( J Surmacz Gorska ),( K Miksch ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.8
The ammonia-oxidizing bacterial (AOB) communities in three membrane bioreactors (MBRs) were monitored for 2 months after an acclimation period in order to investigate the influence of sludge age and medium type on AOB changeability and its connection with nitrification effectiveness. One MBR with a sludge age of 4 days was fed with a synthetic medium, whereas the other two with sludge ages of 8 and 32 days were fed with landfill leachate. The research revealed that landfill leachate can be effectively treated in an MBR with a higher sludge age for longer periods of time and that this improvement in performance was correlated with an increase in AOB biodiversity. Interestingly, the medium type has a stronger influence on AOB biocenosis formation than the sludge age.
Efficient removal of the carbon deposits formed during the mixed methane reforming over Ni/Al2O3
Oleksandr Shtyka,Mateusz Zakrzewski,Radoslaw Ciesielski,Adam Kedziora,Sergey Dubkov,Roman Ryazanov,Malgorzata Szynkowska,Tomasz Maniecki 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.2
This work investigates the process of elimination of carbon deposits formed during the mixed reforming of methane mixture. The mixed reforming of methane to synthesis gas was studied over Ni/Al2O3 catalyst in the 650- 750 oC. The amount of carbon deposit on the surface of catalyst varied from 2.8 to 5.9%, depending on the reaction temperature. The reactivity of carbon species was evaluated in the oxygen, hydrogen, carbon dioxide, and water mixtures. The obtained results revealed the presence of highly active carbon form (etched at a temperature below 200 oC) and inactive form (gasification at a temperature above 500 oC). The SEM and Raman analyses confirmed the presence of carbon in the form of filaments. Among all investigated gasification agents, water vapor was found to be the most efficient in removing the carbon deposit due to better adsorption of water on the surface of aluminum oxide. The overall mechanism of mixed methane reforming along with carbon gasification was shown.
The Structure of the Catalytic Domain of a Plant Cellulose Synthase and Its Assembly into Dimers
Olek, Anna T.,Rayon, Catherine,Makowski, Lee,Kim, Hyung Rae,Ciesielski, Peter,Badger, John,Paul, Lake N.,Ghosh, Subhangi,Kihara, Daisuke,Crowley, Michael,Himmel, Michael E.,Bolin, Jeffrey T.,Carpita, American Society of Plant Biologists 2014 The Plant cell Vol.26 No.7
<P>Small-angle x-ray scattering gives a glimpse at the solution structure of the catalytic domains of plant cellulose synthase and their dimerization. Dimerization through the plant-specific sequences of the catalytic domain provides important clues for how Zn-finger domains couple these fundamental scaffold units into large, multimeric synthase complexes.</P>
( Mozejko Justyna ),( Andreas Wilke ),( Grzegorz Przyby Ek ),( Slawomir Ciesielski ) 한국미생물 · 생명공학회 2012 Journal of microbiology and biotechnology Vol.22 No.3
The present study describes medium-chain-length polyhydroxyalkanoates (mcl-PHAs) production by the Pseudomonas Gl01 strain isolated from mixed microbial communities utilized for PHAs synthesis. A two-step fedbatch fermentation was conducted with glucose and waste rapeseed oil as the main carbon source for obtaining cell growth and mcl-PHAs accumulation, respectively. The results show that the Pseudomonas Gl01 strain is capable of growing and accumulating mcl-PHAs using a waste oily carbon source. The biomass value reached 3.0 g/l of CDW with 20% of PHAs content within 48 h of cultivation. The polymer was purified from lyophilized cells and analyzed by gas chromatography (GC). The results revealed that the monomeric composition of the obtained polyesters depended on the available substrate. When glucose was used in the growth phase, 3-hydroxyundecanoate and 3- hydroxydodecanoate were found in the polymer composition, whereas in the PHAs-accumulating stage, the Pseudomonas Gl01 strain synthesized mcl-PHAs consisting mainly of 3- hydroxyoctanoate and 3-hydroxydecanoate. The transcriptional analysis using reverse-transcription real-time PCR reaction revealed that the phaC1 gene could be transcribed simultaneously to the phaZ gene.