Arbuscular mycorrhizal fungi are considered as a potential biotechnological tool for improving phytostabilization efficiency and plant tolerance to heavy metal-contaminated soils. However, the mechanisms through which AMF help to alleviate metal toxicity in plants are still poorly understood. A greenhouse experiment was conducted to evaluate the effects of two AMF species on the growth, Pb accumulation, photosynthesis and antioxidant enzyme activities of a leguminous tree at Pb addition levels of 0, 500, 1000 and 2000 mg kg-1 soil. AMF symbiosis decreased (...) Pb concentrations in the leaves and promoted the accumulation of biomass as well as photosynthetic pigment contents. Mycorrhizal plants had higher gas exchange capacity, non-photochemistry efficiency, and photochemistry efficiency compared with non-mycorrhizal plants. The enzymatic activities of superoxide dismutase, ascorbate peroxidases and glutathione peroxidase were enhanced, and hydrogen peroxide and malondialdehyde contents were reduced in mycorrhizal plants. These findings suggested that AMF symbiosis could protect plants by alleviating cellular oxidative damage in response to Pb stress. Furthermore, mycorrhizal dependency on plants increased with increasing Pb stress levels, indicating that AMF inoculation likely played a more important role in plant Pb tolerance in heavily contaminated soils. Overall, both F. mosseae and R. intraradices were able to maintain efficient symbiosis with R. pseudoacacia in Pb polluted soils. AMF symbiosis can improve photosynthesis and reactive oxygen species scavenging capabilities and decrease Pb concentrations in leaves to alleviate Pb toxicity in R. pseudoacacia. Our results suggest that the application of the two AMF species associated with R. pseudoacacia could be a promising strategy for enhancing the phytostabilization efficiency of Pb contaminated soils. (shrink)

Strong Turing Determinacy, or ${\mathrm {sTD}}$, is the statement that for every set A of reals, if $\forall x\exists y\geq _T x (y\in A)$, then there is a pointed set $P\subseteq A$. We prove the following consequences of Turing Determinacy ( ${\mathrm {TD}}$ ) and ${\mathrm {sTD}}$ over ${\mathrm {ZF}}$ —the Zermelo–Fraenkel axiomatic set theory without the Axiom of Choice: (1) ${\mathrm {ZF}}+{\mathrm {TD}}$ implies $\mathrm {wDC}_{\mathbb {R}}$ —a weaker version of $\mathrm {DC}_{\mathbb {R}}$.(2) ${\mathrm {ZF}}+{\mathrm {sTD}}$ implies that every (...) set of reals is measurable and has Baire property.(3) ${\mathrm {ZF}}+{\mathrm {sTD}}$ implies that every uncountable set of reals has a perfect subset.(4) ${\mathrm {ZF}}+{\mathrm {sTD}}$ implies that for every set of reals A and every $\epsilon>0$ :(a)There is a closed set $F\subseteq A$ such that $\mathrm {Dim_H}(F)\geq \mathrm {Dim_H}(A)-\epsilon $, where $\mathrm {Dim_H}$ is the Hausdorff dimension.(b)There is a closed set $F\subseteq A$ such that $\mathrm {Dim_P}(F)\geq \mathrm {Dim_P}(A)-\epsilon $, where $\mathrm {Dim_P}$ is the packing dimension. (shrink)

Resumen: La cuestión hoy en día de la identidad cultural es una manifestación inevitable del progreso económico y social de China en el ámbito de la cultura. Sus raíces se encuentran en el lento desarrollo social de la China moderna y en la invasión de la cultura extranjera, que se manifiesta en la apatía hacia la gran cultura tradicional. El inglés es una lengua internacional de uso común que se habla en todo el mundo. Con la creciente popularidad del inglés, (...) la enseñanza universitaria de este idioma ha acaparado una mayor atención en los últimos años. La filosofía es muy teórica, hipotética y difícil de entender, por lo que los profesores de inglés deben ser hábiles a la hora de movilizar la subjetividad y la creatividad de los alumnos mediante el uso de numerosos y beneficiosos recursos. El inglés es un recurso valioso, y su uso correcto en la identificación cultural puede tener implicaciones educativas imprevistas. En consecuencia, la forma de emplear las ideas de la enseñanza universitaria del inglés para fortalecer la identidad cultural nacional es fundamental para avanzar en el crecimiento general de la enseñanza universitaria del inglés y la construcción de la cultura nacional. (shrink)

Review by: Johanna N. Y. Franklin The Bulletin of Symbolic Logic, Volume 19, Issue 1, Page 115-118, March 2013.

Witchcraft and the Rise of the First Confucian Empire. By Liang Cai. Albany, N.Y.: State University of New York Press, 2014. Pp. xii + 276. $85, $27.95.

本书共分为梁漱溟致有关人士 (1949年以前); 梁漱溟致政界人士及有关机构; 梁漱溟致有关人士 (1949年以后); 梁漱溟致师友; 有关人士致梁漱溟; 师友致和梁漱溟; 家书几部分, 其主要内容包括: 致蔡元培; 致胡适等.

Our paper draws attention to a neglected channel of corruption—the bribe payments by state-owned enterprises. This is an important phenomenon as bribe payments by SOEs fruitlessly waste national resources, compromising public welfare and national prosperity. Using a large dataset of 30,249 firms from 50 countries, we show that, in general, SOEs are less likely to pay bribes for achieving organizational objectives owing to their political connectivity. However, in deteriorated institutional environments, SOEs may be subjected to potential managerial rent-seeking behaviors, which (...) disproportionately increase SOE bribe propensity relative to privately owned enterprises. Specifically, our findings highlight the importance of fostering democracy and rule of law, reducing prevalence of corruption and shortening power distance in reducing the incidence of SOE bribery. (shrink)

本书围绕《论语》一书,梁漱溟从自己的理解出发,把儒家思想解释为十三个方面:乐、讷言敏行、看自己、看当下、反宗教、不迁怒不贰过、天命等。同时,还结合中国现时的思想及西方思想,谈了新时期对儒家思想的再审视 、再理解。.

Name der Zeitschrift: Semiotica - Journal of the International Association for Semiotic Studies / Revue de l'Association Internationale de Sémiotique Jahrgang: 2013 Heft: 197 Seiten: 233-265.

As teams of people increasingly incorporate robot members, it is essential to consider how a robot's actions may influence the team's social dynamics and interactions. In this work, we investigated the effects of verbal support from a robot on human team members' interactions related to psychological safety and inclusion. We conducted a between-subjects experiment where the robot team member either gave verbal support or did not give verbal support to the human team members of a human-robot team comprised of 2 (...) human ingroup members, 1 human outgroup member, and 1 robot. We found that targeted support from the robot had a positive effect on outgroup members, who increased their verbal participation after receiving targeted support from the robot. When comparing groups that did and did not have verbal support from the robot, we found that outgroup members received fewer verbal backchannels from ingroup members if their group had robot verbal support. These results suggest that verbal support from a robot may have some direct benefits to outgroup members but may also reduce the obligation ingroup members feel to support the verbal contributions of outgroup members. (shrink)

Liang Qichao was a leading political thinker and publicist. His manifesto, On the New People, was published serially in Japan, where Liang—like many other progressive intellectuals in the late Qing—lived and worked for a decade in order to avoid governmental suppression. The present essay was published in 1902 as part of On the New People. Liang began writing about rights as early as 1896; they came to occupy a prominent place in his theorizing after he arrived in (...) Japan in 1898. He was influenced by the Social Darwinist ideas of Kato Hiroyuki, which can be seen most clearly in Liang's 1899 essay "The Right of the Strongest." Although some of these ideas are still present in the current essay, Liang had by this time developed a more complex position, partly through reading and interpreting the ideas of Rudolph von Jhering , a pioneering German legal theorist whose influence on Liang was significant, as Liang himself declares early in this essay. (shrink)