This study was designed to investigate the influence of growth media consisting of different components on the morphological attributes of oriental spruce seedlings. Eighteen different combinations of Barma peat (BP), tea residue compost (CTR), fine pumice (FP), coarse pumice (CP), perlite (P) and zeolite (Z) were prepared as growth media.The growth medium components did not significantly affect the shoot height (SH), root collar diameter (RCD), shoot:root ratio or dry root percentage (DRP) of 2-year-old seedlings. However, the root dry weight (RDW) and shoot dry weight (SDW) showed significant differences between the different growth media. The maximum SDW (3.244 g) was determined for a mixture of BP (0.5) + CTR (0.2) + CP (0.2) + Z (0.1), while a mixture of BP (0.6) + P (0.2) + Z (0.2) resulted in minimum SDW (1.593 g). In addition, the maximum RDW (1.824 g) was determined for the BP (0.5) + CTR (0.2) + CP (0.2) + Z (0.1) medium, while the BP (0.6) + CP (0.2) + Z (0.2) medium resulted in the lowest RDW (1.013 g). The addition of zeolite to the growth media increased the SDW and RDW of oriental spruce seedlings, so natural zeolite could be used as a substrate to replace pumice and perlite in nurseries in Turkey. Since Turkey has 45.8 billion tonnes of zeolite, its use in nurseries could reduce the costs significantly.
The coat protein gene (CP) from a highly virulent, necrotic and dominant strain of potato virus Y (PVY) originated from the Hungarian flora has been engineered via Agrobacterium infection into different Hungarian tobacco breeding lines and cultivars. The integration of the CP was confirmed by polymerase chain reaction (PCR) using genomic preparations. The transcription and the expression of the integrated CP gene were detected by Northern and Western analysis. The pathogen-derived resistance was demonstrated by inoculation of the R1 progeny of transformant plants with purified PVY. The efficiency of the protection varied between different transgenic tobaccos ranging from complete to no protection. The challenge infection of the plants was monitored by dot blot hybridisation at different intervals after mechanical inoculation. Western blot analysis showed that there is no correlation between the level of expressed CP and the extent of resistance. From tobacco cultivars namely Virgin D, Stamm C2 and Hevesi 11, 38, 55 and 23 transformants were obtained, respectively. After several years of greenhouse experiments, only the extreme resistant tobaccos were planted field under the special licence, given by the competent authority. In field conditions, transgenic tobacco varieties showed extreme resistance against natural infection of PVY.
We consider the selective version of the property of Reznichenko and find necessary and sufficient conditions under which
the function space Cp(X) over a Tychonoff space X satisfies this property. The dual description involves selection principles and game theory.
Authors:I. E. Paukov, Yulia A. Kovalevskaya, and Elena V. Boldyreva
Heat capacity of crystalline L- and DL-phenylglycines was measured in the temperature range from 6 to 305 K. For L-phenylglycine, no anomalies in the Cp(T) dependence were observed. For DL-phenylglycine, however, an anomaly in the temperature range 50–75 K with a maximum at about 60 K was registered. The enthalpy and the entropy changes corresponding to this anomaly were estimated as 20 J mol−1 and 0.33 J K−1 mol−1, respectively. In the temperature range 205–225 K, an unusually large dispersion of the experimental points and a small change in the slope of the Cp(T) curve were noticed. Thermodynamic functions for L- and DL-phenylglycines in the temperature range 0–305 K were calculated. At 298.15 K, the values of heat capacity, entropy, and enthalpy are equal to 179.1, 195.3 J K−1 mol−1, and 28590 J mol−1 for L-phenylglycine and 177.7, 196.3 J K−1 mol−1 and 28570 J mol−1 for DL-phenylglycine. For both L- and DL-phenylglycine, the Cp(T) at very low temperatures does not follow the Debye law C – T3. The heat capacity Cp(T) is slightly higher for L-phenylglycine, than for the racemic DL-crystal, with the exception of the phase transition region. The difference is smaller than was observed previously for the L-/DL-cysteines, and considerably smaller, than that for L-/DL- serines.
Authors:Alejandro López-Gaona, José De los Reyes, Julia Aguilar, and Nancy Martín
Pt/MCM, Pt/SiO2, Pd/MCM and Pd/SiO2 were prepared and characterized by H2-TPR, TEM, 29Si-CP-MAS-NMR, DRS-UV-Vis and tested in the hydrodechlorination of 1,2-dichloroethane. Differences in the catalytic behavior
were related with textural properties.
Authors:Iwona Zięborak-Tomaszkiewicz, Ewa Utzig, and P. Gierycz
The heat capacity of gallium nitride has been measured by DSC method using DuPont Thermal Analyst 2100, DSC 951 unit in the
temperature range (300–850 K). The temperature dependence of the heat capacity can be presented in the following form: Cp=32.960+0.162·10−1T+2360170T−2-775370000T−3.
Authors:B. Tong, Z. Tan, Q. Shi, Y. Li, and S. Wang
The low-temperature heat capacity Cp,m of sorbitol was precisely measured in the temperature range from 80 to 390 K by means of a small sample automated adiabatic
calorimeter. A solid-liquid phase transition was found at T=369.157 K from the experimental Cp-T curve. The dependence of heat capacity on the temperature was fitted to the following polynomial equations with least square
method. In the temperature range of 80 to 355 K, Cp,m/J K−1 mol−1=170.17+157.75x+128.03x2-146.44x3-335.66x4+177.71x5+306.15x6, x= [(T/K)−217.5]/137.5. In the temperature range of 375 to 390 K, Cp,m/J K−1 mol−1=518.13+3.2819x, x=[(T/K)-382.5]/7.5. The molar enthalpy and entropy of this transition were determined to be 30.35±0.15 kJ mol−1 and 82.22±0.41 J K−1 mol−1 respectively. The thermodynamic functions [HT-H298.15] and [ST-S298.15], were derived from the heat capacity data in the temperature range of 80 to 390 K with an interval of 5 K. DSC and TG measurements
were performed to study the thermostability of the compound. The results were in agreement with those obtained from heat capacity
Authors:Iwona Zięborak-Tomaszkiewicz, R. Świerzewski, and P. Gierycz
The heat capacity of the solid indium nitride was measured, using the Calvet TG-DSC 111 differential scanning microcalorimeter
(Setaram, France), in the temperature between (314–978 K). The temperature dependence of the heat capacity can be presented
in the following form: Cp=41.400+0.499·10−3T−135502T−2−26169900 T−3.
Authors:Gyula Farkas, László Leindler, and Gyula Farkas Jr.
Krónikus pancreatitisben (CP) szenvedő betegek egyharmadában az inflammatoricus folyamat a pancreasfej gyulladásos tumorát idézi elő, mely a vezetékrendszerek obstructióját, fájdalmat és fogyást okoz. Egy biztonságos, szervmegtartó pancreasfej-resectiót (OPPHR) dolgoztunk ki. Közleményünkben az elmúlt 8 évben végzett 150 OPPHR műtéti és késői eredményeiről számolunk be. A sebészi beavatkozás magában foglalja a pancreasfejben kialakult gyulladásos tumor széles resectióját anélkül, hogy a pancreast a v. portae felett izolálnánk, illetve átvágnánk. A rekonstrukció, amely biztosítja a resecált pancreas secretióját az emésztőtraktus felé, a vékonybélből izolált Roux-kaccsal történik. A posztoperatív időszakban két reoperációra kényszerültünk, egyrészt anastomosisvérzés, másrészt vékonybél-adhaesiós ileus miatt, ugyanakkor halálos szövődmény nem jelentkezett. Az ápolási idő 7 és 12 nap között változott. Az áltagos utánkövetési idő 4,5 év volt (0,5–8 év). A késői mortalitás 4%-osnak bizonyult. A műtét után a betegek 89%-ában az életminőség javult, melyet EORTC Quality-of-Life kérdésekre adott válaszok bizonyítottak. A 8 éves klinikai megfigyeléseink egyértelműen alátámasztották, hogy az OPPHR műtét egy biztonságos és hatásos sebészi beavatkozás a CP komplikációinak megoldására, és javasolt műtétnek tekinthető a CP gyógyítására.