Single spin asymmetry measurements for π0\pi^0 inclusive productions in p+p↑→π0+Xp+p_{\uparrow} \to \pi^0 + X and \pi^-+\p_{\uparrow}\to \pi^0+X reactions at 70 and 40 GeV respectively

The inclusive $\pi^0$ asymmetries were measured in reactions $p+p\uparrow \to \pi^0+X$ and $\pi^-+p\uparrow \to \pi^0+X$ at 70 and 40 GeV/c respectively. The measurements were made at the central region (for the first reaction) and asymmetry is compatible with zero in the entire measured $p_T$ region. For the second reaction the asymmetry is zero for small $x_F$ region ($-0.4<x_F<-0.1, 0.5<p_T(GeV/c) <1.5$) and increases with growth of $\mid x_F\mid$. Averaged over the interval $-0.8<x_F<-0.4, 1<p_T(GeV/c)<2$ the asymmetry was $-(13.8\pm 3.8)$.Comment: 4 pages, 2 figures; Presented at SPIN-2004 at Trieste, October 10-16,200

Способ контроля продуктивности растения

The necessary condition for obtaining high yields is the management of plant production processes in closed artificial agroecosystems. It is important to control the intensity of these processes in a dynamic mode. (Research purpose) To develop a non-destructive method for controlling the plant productivity growth to create algorithms for controlling the plant production processes. (Materials and methods) The authors studied the dependence of plant productivity on leaf temperature. They determined the increase in plant leaf mass using digital scales, studied the leaf temperature and the control object with a pyrometric thermometer and measured the leaf surface area. (Results and discussion) The authors obtained the values of plant and environmental parameters and, taking into account the moisture consumption for transpiration cooling, determined the values of the lettuce leaf mass growth (Latuca sativa L.), which would be used in conjunction with other measured plant and environmental parameters to control the limiting factors in closed artificial agroecosystems. (Conclusions) The authors developed a non-destructive method to control plant productivity growth in climatic chambers using the example of Krasnyy Dubolistnyy lettuce. It was determined that the green mass growth rate had a maximum if the mass of cooling water during evaporation was 0.65 gram. That meant the plant tried to maximize the use of free energy and the productive factors that determined it. The weight values calculated from the experiment results (2.0 grams) corresponded to the data obtained at the Omsk State Agrarian University (1.9 gram) with an accuracy of 5 percent.Реферат. Показали, что управление продукционными процессами в растении в системе закрытых искусственных агроэкосистем – необходимое условие получения высоких урожаев. Важно контролировать интенсивность этих процессов в динамическом режиме.  (Цель исследования) Разработать способ неразрушающего контроля роста продуктивности растений для создания алгоритмов управления продукционными процессами. (Материалы и методы) Изучили зависимость продуктивности растения от температуры листа. Определили прирост листовой массы растения с помощью цифровых весов, провели учет температуры листа и контрольного объекта пирометрическим термометром, измерили площадь листовой поверхности.  (Результаты и обсуждение) Получили значения параметров растения и окружающей среды и, учитывая расход влаги на транспирационное охлаждение, установили значения прироста листовой массы салата (Latuca sativa L.), которые будут использованы в совокупности с другими измеренными параметрами растения и окружающей среды для управления лимитирующими факторами в закрытых искусственных агроэкосистемах. (Выводы) Разработали способ неразрушающего контроля роста продуктивности растений в климатических камерах на примере салата сорта Красный дуболистный. Определили, что прирост прирост зеленой массы имеет максимум, если масса охлаждающей воды при испарении равна 0,65 грамма, то есть растение стремится максимально использовать свободную энергию и определяющие ее продуктивные факторы. Рассчитанные по результатам эксперимента весовые значения (2,0 грамма) соответствуют данным, полученным в Омском государственном аграрном университете (1,9 грамма), с точностью 5 процентов

Stabilization of a-conotoxin AuIB: influences of disulfide connectivity and backbone cyclization

a-Conotoxins are peptides isolated from the venom ducts of cone snails that target nicotinic acetylcholine receptors (nAChRs). They are valuable pharmacological tools and have potential applications for treating a range of conditions in humans, including pain. However, like all peptides, conotoxins are susceptible to degradation, and to enhance their therapeutic potential it is important to elucidate the factors contributing to instability and to develop approaches for improving stability. AuIB is a unique member of the a-conotoxin family because the nonnative &quot;ribbon&quot; disulfide isomer exhibits enhanced activity at the nAChR in rat parasympathetic neurons compared with the native &quot;globular&quot; isomer. Here we show that the ribbon isomer of AuIB is also more resistant to disulfide scrambling, despite having a nonnative connectivity and flexible structure. This resistance to disulfide scrambling does not correlate with overall stability in serum because the ribbon isomer is degraded in human serum more rapidly than the globular isomer. Cyclization via the joining of the N- and C-termini with peptide linkers of four to seven amino acids prevented degradation of the ribbon isomer in serum and stabilized the globular isomers to disulfide scrambling. The linker length used for cyclization strongly affected the relative proportions of the disulfide isomers produced by oxidative folding. Overall, the results of this study provide important insights into factors influencing the stability and oxidative folding of a-conotoxin AuIB and might be valuable in the design of more stable antagonists of nAChRs