temperature and gravitational stress tests
Báo cáo toán học: "The effect of temperature and water stress on laboratory germination of Eucalyptus globulus Labill. seeds of different sizes" pot
... capacities for sizes and occurred between 13 and 33 ºC; for seed sizes and the maximum occurred between 18º and 24 ºC While a significant interaction was found between temperature and seed size (table ... how temperature, water potential and seed size in E globulus might be exploited to improve germination efficiency and seedling uniformity MATERIALS AND METHODS E globulus seeds of Flinders Island ... optimum germination temperature for this unsorted seedlot Germination rate increased with temperature to an optimum of 28 ºC and then declined (figure 1b) The lower and upper temperature thresholds...
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Báo cáo y học: "NITRIC OXIDE (NO), CITRULLINE – NO CYCLE ENZYMES, GLUTAMINE SYNTHETASE AND OXIDATIVE STRESS IN ANOXIA (HYPOBARIC HYPOXIA) AND REPERFUSION IN RAT BRAIN"
... TBARS and decreased concentration of TAS supports the oxidative stress in anoxia and reperfusion and suggests a possible role for anti oxidants in preventing neuro- 153 degeneration in anoxia and ... incidents involving anesthesia To understand the role of citrulline-NO cycle enzymes, GS and the oxidative status in anoxia and reperfusion, NOS, AS, AL, GS and arginase activities along with the ... were removed and killed by decapitation The brains were quickly removed and the different regions (CC, CB and BS) were separated according to the procedure described by Sadasivudu and Lajtha (22)...
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Tài liệu Phytohormones and Abiotic Stress Tolerance in Plants ppt
... BR-treated plants Oxidative stress- related genes encoding monodehydroascorbate reductase and thioredoxin, the cold and drought stress response genes COR47 and COR78, and the heat stress- related genes ... of stress Broad range of abiotic stresses includes osmotic stress caused by drought, salinity, high or low temperatures, freezing, or flooding, as well as ionic, nutrient, or metal stresses, and ... subgroup S, C, and G, respectively, were also involved in salt and freezing stresses These proteins bind to ABRE and couple of other cis-acting elements with differential affinity and improve stress tolerance...
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Tài liệu Báo cáo khoa học: Temperature and phosphate effects on allosteric phenomena of phosphofructokinase from a hibernating ground squirrel (Spermophilus lateralis) pptx
... paid to the effects of temperature on enzyme allostery and the influence of temperature in the regulation of PFK activity at both high (euthermic) and low (hibernating) temperatures Results Selected ... 3–15 °C temperature range of the plots were 103.2 ± 0.2 and 80.0 ± 1.2 kJ mol)1 in the absence and presence of phosphate For the 15–45 °C temperature range, the Ea values were 25.7 ± 0.7 and 26.2 ... modification Another approach focused on temperature and pH dependent shifts in PFK activity and subunit assembly [6,7,21,22] The effects of acidosis and temperature were proposed to cause reversible...
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Báo cáo khoa học: Transcript profiling reveals diverse roles of auxin-responsive genes during reproductive development and abiotic stress in rice pdf
... control; DS, desiccation stress; SS, salt stress; CS, cold stress The fold change value, P-value and regulation (up ⁄ down) are given in Table S6 stress condition, only 51 and three genes, respectively, ... development and abiotic stress responses Twenty (17 upregulated and three downregulated) genes were commonly regulated during various stages of panicle development and abiotic stress conditions, and ... upregulated and downregulated (in parentheses) under different stress conditions The numbers of genes upregulated under one or more stress condition(s) and downregulated under other stress condition(s)...
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Báo cáo khoa học: Calcium, mitochondria and oxidative stress in neuronal pathology Novel aspects of an enduring theme pdf
... Mitochondrial calcium and oxidative stress as mediators of ischemic brain injury Cell Calcium 36, 257–264 441 Ca2+, mitochondria, ROS in neuronal disease C Chinopoulos and V Adam-Vizi 17 Andreyev AY, ... mechanisms and implications in human pathology IUBMB Life 52, 159–164 30 Barja G (1999) Mitochondrial oxygen radical generation and leak: sites of production in states and 3, organ specificity, and relation ... described by Manev and colleagues [149], further characterized by the groups of Thayer [150] and Tymianski [146] However, credit should also be given to an earlier work by Connor and colleagues,...
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Báo cáo " Calculation of Lindemann’s melting Temperature and Eutectic Point of bcc Binary Alloys " pot
... Melting temperature, Cs, Ref Melting temperature, Rb, Ref 305 300 295 2700 Melting curve, present Melting temperature of Cr, Ref Melting temperature of Mo, Ref Eutectic point, present Melting temperature, ... curve beginning from the melting temperature TA of the host element A passes through a temperature minimum TE known as the eutectic point E and ends at the melting temperature TB of the doping element ... s = (30) with Tm(1) and Tm(2) as melting temperatures of the first or doping and the second or host element, respectively, composing the binary alloy Therefore, the melting temperature of bcc...
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Báo cáo khoa học: Cotton GhMPK2 is involved in multiple signaling pathways and mediates defense responses to pathogen infection and oxidative stress doc
... hormone signaling, biotic and abiotic stress responses, and development [15,16], whereas high concentrations of ROS can result in oxidative stress and cause irreversible damage and hypersensitive response-like ... processes and have unique biological functions Cotton (Gossypium hirsutum) is one of the oldest and most important fiber and oil crops Its growth and yield are severely inhibited under various biotic and ... genes and ET biosynthesis genes in transgenic and wild-type plants (A) The mRNA levels of defense-related genes and ET biosynthesis genes in transgenic and wild-type tobacco plants without any stress, ...
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Báo cáo khoa học: The crystal structure of annexin Gh1 from Gossypium hirsutum reveals an unusual S3 cluster Implications for cellulose synthase complex formation and oxidative stress response potx
... reduced forms and a methionine residue The cluster is likely to be involved in redox reactions and might constitute the molecular basis of oxidative stress response by annexins Materials and methods ... domains III and IV is a U-shaped, positively charged patch The patch is formed by five lysine and three arginine residues (Lys223, Lys226, Arg238, Lys242, Lys249, Lys253, Arg256, and Arg291) and, in ... live and breathe: free radicals and aging Correlative evidence from a number of fields suggests they may be key Biotechnology 12, 37–40 Chiueh, C (2001) Iron overload, oxidative stress, and axonal...
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Báo cáo khoa học: The molecular chaperone a-crystallin incorporated into red cell ghosts protects membrane Na/K-ATPase against glycation and oxidative stress ppt
... was the same at t ¼ and h This indicates that the 14 C sucrose was trapped by loading and resealing and did not leak out of the ghost cells The ghost cells were incubated with and without modifiers ... were prepared as described in the methods section and incubated at 37 °C, 10 lL samples taken at t ¼ and t ¼ h and assayed Error bars represent standard deviation 2610 B K Derham et al (Eur J Biochem ... heart disease, hypertension and cataract Altered Na+ and K+ concentrations are observed in many forms of human cataract and correlate with increasing lens colour and with cortical opacification...
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Báo cáo khoa học: Rice cytosine DNA methyltransferases – gene expression profiling during reproductive development and abiotic stress pptx
... activation of OsCMT2 in seedlings subjected to cold and salt stress and the downregulation of OsCMT3 expression under salt and drought stress is interesting and provides the foundation for further in ... actively dividing tissues of roots and during the formation of inflorescence and floral meristems and the initiation of floral organs (P1-I and P1-II in rice and F1 and F2 in Arabidopsis) AtCMT3 is ... panicle initiation (P1-I and P1-II) and the early seed development stages (Tables S2 and S4) In comparison with leaf tissues (mature leaf and Y leaf), there was an 87-, 7 7and 81-fold increase (P...
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Báo cáo khoa học: Temperature and concentration-controlled dynamics of rhizobial small heat shock proteins doc
... class A and class B sHsp complexes is adjusted to the ambient temperature and to protein concentration, and that mutant proteins equivalent to HspH(G114A) form unstable complexes Materials and methods ... 45 and 38 kDa (B) Elution profile at 25 °C of a sample diluted from mgÆmL)1 (arrow) to 0.5 mgÆmL)1 elution of standard proteins was completely independent of temperature (Fig 1D) Temperature- and ... multiplied and then divided by the difference between the m/z values Results Temperature- and concentration-dependent oligomerization of class A proteins transfer stage pressure, 8.0 · 10)3 mbar; and...
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Báo cáo khoa học: Temperature and salts effects on the peptidase activities of the recombinant metallooligopeptidases neurolysin and thimet oligopeptidase pdf
... changes of temperature and ionic strength Finally, differences in the specicities and effects of salts and temperature between the two enzymes were signicant, although not large, and could be ... conduced at different temperatures and at different salt concentrations [5] Temperature dependence of the hydrolysis reaction rates of the substrates by neurolysisn and TOP The temperature dependence ... Ala and Ile at the X position gave two linear ttings, above and below % 22 C (Fig 1B), indicating different rate-limiting steps at each temperature range (above and below 22 C) The DG* DH* and...
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Báo cáo khoa học: Expression profile of PIN, AUX ⁄ LAX and PGP auxin transporter gene families in Sorghum bicolor under phytohormone and abiotic stress pot
... contains AtAUX1, AtLAX1 and two members in sorghum and rice (SbLAX1, -2, -4 and OsLAX2, -4, -5) and the other clade contains AtLAX2 and AtLAX3, and three members of SbLAX and OsLAX family Phylogenetic ... AtPGP1, AtPGP4 and AtPGP19 are well characterized in Arabidopsis and can be placed into groups and (Fig 2C, and Tables S3 and S4) SbPGP21 is close to AtPGP1, and two SbPGPs (SbPGP16 and SbPGP18) ... distinct tandem duplicate gene clusters represented 10 SbPGP genes: two clusters with two tandem genes (SbPGP19–20 and SbPGP23–24), and another two clusters containing three tandem genes (SbPGP5–7 and...
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Báo cáo khoa học: The influence of temperature and osmolyte on the catalytic cycle of cytochrome c oxidase ppt
... well defined metal centers that act as electron acceptors and donors, ET rates into and out of these centers are influenced by temperature and can be analyzed using the Arrhenius relation [26] In ... with the same syringe and the CO flashed off The temperature of the cuvette wall was monitored before and after flashing The samples were monitored at a wavelength of 442 nm and the data stocked ... analysis and prevents us from being able to make a direct comparison between CCO at high temperature (> 290 K) with and without ethylene glycol The bending of the curve in Fig at the higher temperatures...
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carbon dioxide and environmental stress
... area and display and in plant spacing affect the energy supply for the two processes in a nearly identical manner Thus, "A and T on a per unit land area basis are closely linked and go hand in hand, ... annual NPP to annual precipitation and annual mean temperature This might be interpreted as a general model of landscape water and temperature stresses Water stress can be reduced by an increase ... Carbon Dioxide and Environmental Stress on Plants and Ecosystems: A Synthesis Yiqi Luo, Josep Canadell, and Harold A Mooney I Introduction 393 II Interactive Effects of Carbon Dioxide and Stresses...
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life temperature and the earth
... carbon in sediments, F2 and F4 the sedimentary recycling fluxes of carbonates and organic carbon, respectively, and Scarb and Sorg the subduction fluxes to the mantle of carbonate and organic carbon, ... biochemical and biophysical upper temperature limit for its metabolism Thus, with the longterm cooling of the Earth’s surface, new metabolisms and cell types became possible as their upper temperature ... and the surface temperature But first a historical overview of theories of the coevolution of life and its environment (the most common definition of the biosphere) is needed The Gaia concept and...
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COMBINED BENDING AND DIRECT STRESS
... the separate effects of P and M The stresses due to P and M acting separately are shown in Figure 12.l(iii) and (iv) On combining the two stress systems, the resultant stress in any fibre is (r ... 37.5 cm and 75 cm and the material is 2.5 cm thick all round, and the longer dimension is in the direction AB Calculate the maximum tensile and compressive stresses set up in the section, and locate ... maximum bending stresses due to the couple of 250 Nm are equal to 288 Bending stresses and direct stresses combined (250)(0*0125) (13.02 x 10-9) = 240 m m l Hence the maximum tensile stress on the...
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fontanills - the options course - high profit and low stress trading methods, 2nd ed
... Australia, and Asia, Wiley is globally committed to developing and marketing print and electronic products and services for our customers’ professional and personal knowledge and understanding The ... parameters and by applying strategies that combine stocks and options on stocks, or futures and options on futures Develop a Flexible Investment Plan The second step in reducing risk and stress is ... including assets, expected future earnings, and the supply of and demand for the shares of the company Accurately determining the supply of and demand for a company’s stock is very important...
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- an essential metabolite in defence against chemical and oxidative stress in the kinetoplastida the kinetic mechanism for glutathionylspermidine synthetase ec 6318 from crithidia fasciculata cfgsps obeys a rapid equilibrium random terter model with kin
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