The effects of environmental temperature changes on the EKG of the squirrel monkey /Saimiri sciureus/

Environmental temperature effects on EKG of squirrel monkey - animal study of heart rate and T-wave amplitud

Modification of vestibular sensitivity in the rat

Vestibular sensitivity and associated locomotor responses of rats in rotating environmen

Let’s Sit at the Table for women’s empowerment

We report on Let’s Sit at the Table, an ongoing series of seven (so far) roundtables launched in partnership by the Dubai based social enterprise Evolvin' Women and The Retreat Palm Dubai MGallery by Sofitel in September 2017. The roundtables were designed to explore best practices in the Gulf region driving women within the hospitality industry to senior leadership positions. Here we focus on one of the roundtables, which took place on February 21st, 2018 and was centered on the topic of empowering women in hospitality through education. The roundtable explored how to encourage women and girls to take up positions in fields where they lack representation, such as in the culinary arts. The roundtable was attended by ten experts in the areas of education and hospitality and revolved around several questions developed in line with the UN's Women Empowerment Principles (http://www.weprinciples.org/). To encourage further research we first briefly describe the problem as acknowledged in the academic literature and as experienced by one social enterprise in Dubai

A detailed protocol for RNA cleavage assay in sympathetic neurons

This protocol illustrates the use of an in vitro assay to study the cleavage of the IMPA1 3′UTR by the endonuclease Ago2 in sympathetic neurons. The procedure includes the preparation of cytoplasmic protein extracts and also describes the synthesis and labeling of the RNA probe. The protocol can be applied to other cell systems, RNA transcripts, and endonucleases to confirm the role of known cleavage site(s) and cleavage proteins, or to investigate new ones. For complete details on the use and execution of this protocol, please refer to Andreassi et al. (2021)

Preface

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/89520/1/j.1556-6978.1967.tb01893.x.pd

Transfer of old ‘reactivated’ memory retrieval cues in rats

The present studies examined whether the retrieval of an old ‘reactivated’ memory could be brought under the control of new contextual cues. In Experiment 1 rats trained in one context were exposed to different contextual cues either immediately, 60 min, or 120 min after a cued reactivation of the training memory. When tested in the shifted context, subjects exposed shortly after reactivation treated the shifted context as the original context. This transfer diminished with longer post-reactivation delays. Experiment 2 replicated the basic finding and demonstrated that the transfer of the old retrieval cues was specific to the contextual cues present during exposure. These findings are consistent with previous research (i.e., Briggs, Fitz, & Riccio, in press) showing the transfer of retrieval cues for a new memory, and demonstrating a similarity (in this case) between newly acquired and old reactivated memories

Transfer of extinction retrieval cues attenuates the renewal effect in rats

An experiment using rats investigated whether retrieval cues for an extinction memory could also be brought under the control of cues not physically present during extinction learning. Following the extinction of a fear motivated task in a context different from original learning, rats were exposed to the training context either immediately, 30 min, or 60 min after extinction. When tested back in the original context, rats that were exposed to the training context immediately following extinction treated the context as if it had received extinction in that setting, i.e., no renewal. This attenuation of renewal was reduced or eliminated with longer post-extinction delays, which suggests the importance of an active extinction memory during exposure. These findings are consistent with other research examining the transfer of retrieval cues using original memories and old reactivated memories, and in this case demonstrate a similarity between extinction learning with original acquisition

Fate of the original retrieval cues following the transfer of memory in rats

Exposure to contextual cues immediately after conditioning enables the new stimuli to retrieve the target memory. But what is the fate of the original cues after this type of transfer of properties? Have they been supplanted by the new cues, or are both sets of stimuli now effective? To address this issue, an experiment was conducted investigating the effectiveness of the original training cues following the transfer of retrieval cues to a new context. Rats were exposed to contextual cues different from training immediately after learning a punishment task. Subjects tested in the new context treated the context as if it were the original, i.e., retrieval cues were transferred to the shifted context. In addition, this transfer had no effect on the original memory as rats that were tested in the original context behaved similarly to those tested in the shifted context. It appears that this transfer of retrieval cues is not a case of erase-and-update, but rather the cues remain for the original context and also become associated with the new context where exposure took place

On the use of lock-in thermography to monitor delamination growth in composite panels under compression

Abstract The success of composites in automotive, aerospace, and naval applications is mainly related to their aptitude to be tailored to obtain a final product that perfectly fulfills the design requirements. However, during both manufacturing processes and maintenance, some flaws, like delaminations (which may escape simple visual inspection), may be induced in composite structures. The presence of delaminations is of major concern for the load-carrying capability of carbon fiber-reinforced polymer panels. Indeed, delaminations can strongly affect the structural strength and may grow under in-service loads, leading sometimes to catastrophic failures. The aim of this work is to explore the use of lock-in thermography for the monitoring of delamination propagation in composite structures when subjected to generic multiaxial loading conditions. A stiffened composite panel with an embedded skin delamination subjected to compressive loading was taken as a benchmark to assess experimentally the effectiveness of lock-in thermography for monitoring the delamination propagation in situ during the compressive mechanical test. The delamination size as a function of the applied load, observed by lock-in thermography during the execution of the compressive test, was used to validate the results of preliminary numerical computations