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Experimental Thermal Conductivity of Ice Crystalline Layer in Layer Melt Crystallization
Kim, Kwang-Joo,Lee, Sang-Hoon,Ulrich, Joachim 한국공업화학회 2003 Journal of Industrial and Engineering Chemistry Vol.9 No.2
Measurements of thermal conductivity of ice crystalline layer grown from water-sodium chloride solution by layer crystallization were explored. Interfacial temperature and growth rate of crystalline layer could be measured during the growth of layer. The method was based on heat balance coupled mass balance in growing the layer. The measurements were carried out at layer crystallization conditions such as cooling rate, mixture composition and subcooling degree. The growth rate of ice crystalline layer in water-sodium chloride system was decreased with increasing concentration of sodium chloride, and was proportional to the sencond power of subcooling degee. The thermal conductivity of crystalline layer was determined by overall heat transfer coefficient and heat transfer coefficients in melt and coolant sides. The overall heat transfer coefficient and the thermal conductivity increased with decreasing the concentration of sodium chloride and the cooling rate.
Scagliotti, Giorgio Vittorio,Parikh, Purvish,von Pawel, Joachim,Biesma, Bonne,Vansteenkiste, Johan,Manegold, Christian,Serwatowski, Piotr,Gatzemeier, Ulrich,Digumarti, Raghunadharao,Zukin, Mauro,Lee, American Society of Clinical Oncology 2008 Journal of clinical oncology Vol.26 No.21
<B>Purpose</B><P>Cisplatin plus gemcitabine is a standard regimen for first-line treatment of advanced non-small-cell lung cancer (NSCLC). Phase II studies of pemetrexed plus platinum compounds have also shown activity in this setting.</P><B>Patients and Methods</B><P>This noninferiority, phase III, randomized study compared the overall survival between treatment arms using a fixed margin method (hazard ratio [HR] < 1.176) in 1,725 chemotherapy-naive patients with stage IIIB or IV NSCLC and an Eastern Cooperative Oncology Group performance status of 0 to 1. Patients received cisplatin 75 mg/m<SUP>2</SUP>on day 1 and gemcitabine 1,250 mg/m<SUP>2</SUP>on days 1 and 8 (n = 863) or cisplatin 75 mg/m<SUP>2</SUP>and pemetrexed 500 mg/m<SUP>2</SUP>on day 1 (n = 862) every 3 weeks for up to six cycles.</P><B>Results</B><P>Overall survival for cisplatin/pemetrexed was noninferior to cisplatin/gemcitabine (median survival, 10.3 v 10.3 months, respectively; HR = 0.94; 95% CI, 0.84 to 1.05). Overall survival was statistically superior for cisplatin/pemetrexed versus cisplatin/gemcitabine in patients with adenocarcinoma (n = 847; 12.6 v 10.9 months, respectively) and large-cell carcinoma histology (n = 153; 10.4 v 6.7 months, respectively). In contrast, in patients with squamous cell histology, there was a significant improvement in survival with cisplatin/gemcitabine versus cisplatin/pemetrexed (n = 473; 10.8 v 9.4 months, respectively). For cisplatin/pemetrexed, rates of grade 3 or 4 neutropenia, anemia, and thrombocytopenia (P ≤ .001); febrile neutropenia (P = .002); and alopecia (P < .001) were significantly lower, whereas grade 3 or 4 nausea (P = .004) was more common.</P><B>Conclusion</B><P>In advanced NSCLC, cisplatin/pemetrexed provides similar efficacy with better tolerability and more convenient administration than cisplatin/gemcitabine. This is the first prospective phase III study in NSCLC to show survival differences based on histologic type.</P>
Long-Term Follow-up of Enhanced Holter- Electrocardiography Monitoring in Acute Ischemic Stroke
Rolf Wachter,Mark Weber-Krüger,Gerhard F. Hamann,Pawel Kermer,Jan Liman,Meinhard Mende,Joachim Seegers,Katrin Wasser,Sonja Gröschel,Timo Uphaus,Holger Poppert,Martin Köhrmann,Markus Zabel,Ulrich Laufs 대한뇌졸중학회 2022 Journal of stroke Vol.24 No.1
Background and Purpose Prolonged electrocardiography (ECG)-monitoring in stroke patients improves the detection of paroxysmal atrial fibrillation (pAF). However, most randomized studies only had short follow-up. We aimed to provide 3-year follow-up data for AF detection and stroke recurrence risk. Methods We randomized 402 patients aged ≥60 years with acute ischemic strokes without AF to either enhanced and prolonged monitoring (EPM; 3×10-day Holter-ECG-monitoring) or standard-of-care (≥24 hours ECG-monitoring). The endpoint of the current analysis was AF within 36 months analyzed by intention to treat. Long-term follow-up was performed for 36 months. Results Two hundred and seventy-four patients (80%) participated in the extended follow-up(median duration of follow-up was 36 months [interquartile range, 12 to 36]). During the first 6 months, more AF was documented in the EPM arm compared to the control arm (13.5% vs. 5.1%; 95% confidence interval, 2.9% to 14.4%; P=0.004). During months 6 to 36, AF was less detected in the EPM intervention arm than in the control arm (2.0% vs. 7.3%; 95% confidence interval, 0.7% to 9.9%; P=0.028). Overall, the detection rate of AF within 36 months was numerically higher within the EPM group (15.0% vs. 11.1%, P=0.30). Numerically less patients in the EPM arm had recurrent ischemic strokes (5.5% vs. 9.1%, P=0.18), transient ischemic attacks (3.0% vs. 4.5%, P=0.44) or died (4.5% vs. 6.6%, P=0.37). Conclusions Enhanced and prolonged ECG monitoring increased AF detection during the first six months, but there was significantly more clinical AF during months 6 to 36 observed in the usual-care arm. This suggests that EPM leads to an earlier detection of clinically relevant AF.
PP2A negatively regulates the hypertrophic response by dephosphorylating HDAC2 S394 in the heart
윤소미,국태원,민현기,권덕화,조영국,김미라,신세라,정호석,정승훈,이수민,강가은,박윤철,김용숙,안영근,Julie R. McMullen,Ulrich Gergs,Joachim Neumann,김경근,김정철,남광일,김영국,국현,엄광현 생화학분자생물학회 2018 Experimental and molecular medicine Vol.50 No.-
Cardiac hypertrophy occurs in response to increased hemodynamic demand and can progress to heart failure. Identifying the key regulators of this process is clinically important. Though it is thought that the phosphorylation of histone deacetylase (HDAC) 2 plays a crucial role in the development of pathological cardiac hypertrophy, the detailed mechanism by which this occurs remains unclear. Here, we performed immunoprecipitation and peptide pull-down assays to characterize the functional complex of HDAC2. Protein phosphatase (PP) 2 A was confirmed as a binding partner of HDAC2. PPP2CA, the catalytic subunit of PP2A, bound to HDAC2 and prevented its phosphorylation. Transient overexpression of PPP2CA specifically regulated both the phosphorylation of HDAC2 S394 and hypertrophyassociated HDAC2 activation. HDAC2 S394 phosphorylation was increased in a dose-dependent manner by PP2A inhibitors. Hypertrophic stresses, such as phenylephrine in vitro or pressure overload in vivo, caused PPP2CA to dissociate from HDAC2. Forced expression of PPP2CA negatively regulated the hypertrophic response, but PP2A inhibitors provoked hypertrophy. Adenoviral delivery of a phosphomimic HDAC2 mutant, adenovirus HDAC2 S394E, successfully blocked the anti-hypertrophic effect of adenovirus-PPP2CA, implicating HDAC2 S394 phosphorylation as a critical event for the anti-hypertrophic response. PPP2CA transgenic mice were protected against isoproterenolinduced cardiac hypertrophy and subsequent cardiac fibrosis, whereas simultaneous expression of HDAC2 S394E in the heart did induce hypertrophy. Taken together, our results suggest that PP2A is a critical regulator of HDAC2 activity and pathological cardiac hypertrophy and is a promising target for future therapeutic interventions.