Rose Petal Tea as an Antioxidant-rich Beverage: Cultivar Effects

ABSTRACT Twelve rose cultivars were selected by field tasting as potential sources of edible flowers. Hot water infusions (teas) of air‐dried petals of these cultivars were assayed for antioxidant activity, total phenols, and total anthocyanins contents. Their composition was analyzed by high‐performance liquid chromatography (HPLC). Green tea was tested in parallel as a reference antioxidant‐rich beverage. Rose petal teas from different cultivars exhibited scavenging capacity toward 2,2′‐azino‐bis‐(3‐ethylbenzothiazoline)‐6‐sulfonate cation radical (ABTS+) ranging between 712.7 and 1770.7 μM Trolox equivalents (TE) per gram of dry petals, as compared with 1227.6 μM TE/g dry weight in the green tea. The range of total phenols content in rose teas was 50.7 to 119.5 mg gallic acid equivalents (GAE) per gram of dry matter, as compared with 62.1 mg GAE/g dry weight in the green tea. The rose teas were rich in free gallic acid. The highest values of antioxidant activity, total phenols, and gallic acid contents were found in the cultivars San Francisco, Katharina Zeimet, and Mercedes and in the essential‐oil‐bearing rose Rosa damascena. The correlation coefficients between antioxidant activity, on the 1 hand, and the contents of total phenols and of gallic acid in various rose cultivars, on the other hand, were 0.79 and 0.81, respectively. No clear relationship between anthocyanin level and radical‐scavenging activity was revealed. Teas from different rose cultivars significantly differed in their sensory properties. It was concluded that dried rose petals may be used for preparing antioxidant‐rich caffeine‐free beverages, either separately or in combination with other herbal materials.     

Lethality of pyrethrins to larvae and postlarvae of the American lobster (Homarus americanus)

Failed spinal anaesthesia for left total hip arthroplasty was followed postoperatively by dense motor paralysis and sensory deficit in the right leg. The patient had received a dose of subcutaneous heparin 1 h before the spinal anaesthetic was attempted. She died of pulmonary embolism on the ninth postoperative day. At autopsy extensive haematomyelia was found in relation to the needle track.     

Development of a factor VIII inhibitor in a newborn haemophiliac

A major problem in the treatment of haemophilia A is the development of inhibitors (antibodies) against factor VIII. We report the case of a newborn male with no family history of haemophilia who developed an intracerebral haemorrhage. On day 10 post-delivery severe haemophilia A was diagnosed and treatment with recombinant FVIII (rFVIII) concentrate was started. Seventy-two hours later the presence of inhibitors was suspected because high doses of rFVIII were required to maintain therapeutic FVIII plasma levels. Days after, the inhibitor was detected. The quick detection of the inhibitor in this newborn haemophiliac allowed us to start the immunotolerance early, without interruption in the administration of rFVIII.     

VICINAL DIKETONES IN BEER. PART I: A MODIFIED EBC METHOD FOR THE DETERMINATION OF DIACETYL AND OTHER VICINAL DIKETONES IN BEER

A rapid and reliable analytical method for the determination of diacetyl and other vicinal diketones in beer is described. Like Analytica EBC, the new assay is based on the spectrophotometric estimation of 2,3-dialkylquinoxalines. A comparison between these two methods is made, from which it can be concluded that both the recovery figures for added diacetyl and the coefficient of variation found in the modified method show a notable improvement compared with the EBC method. This method is recommended for quality control use on the basis of its speed and accuracy.     

Impaired learning in patients with closed-head injuries: An analysis of components of the acquisition process.

Several studies have already shown a deficit in learning ability following closed-head injury (CHI). Moreover, different learning curves have been claimed to characterize different head-injured subgroups (A. R. Luria, 1973). The present study separated the learning process into 2 different components: the number of new words added in each learning trial and the number of words omitted from trial to trial. The Rey Auditory Verbal Learning Test was administered to 30 normal Ss and 30 CHI Ss. Analysis of the number of words recalled in each of the 5 learning trials showed that, relative to the CHI group, the control group recalled a greater number of words and exhibited a steeper learning curve. Further analysis revealed that the control group's steeper learning curve was a product of both a significantly greater increment of words in each trial and a significantly smaller number of words omitted from trial to trial. The clinical and theoretical implications of the distinction between addition and omission of information in the learning process are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Adaptive manuals as assistive technology to support and train people with acquired brain injury in their daily life activities

Assistive technologies and ubiquitous computing can be related since both try to help people in their lives. This common objective motivated us to develop and evaluate a system that puts ubiquitous computing technologies into the rehabilitation process of people with acquired brain injury. Thus, in this paper, we present and evaluate a system that shows adaptive manuals for daily-life activities for people with acquired brain injury. This first evaluation allowed us to validate our approach and also to extract valuable information about these systems as well as environmental factors that may affect the patients.     

Continuance use intention of enterprise instant messaging: a knowledge management perspective

Instant messaging has been widely utilised by a variety of types of organisations to improve the efficiency and effectiveness of internal communication and knowledge management (KM). To date, though, the continuance use of enterprise instant messaging (EIM) and its impact on KM outcomes have not been well understood in both academia and practice. This paper uses the decomposed theory of planned behaviour to explore factors that influence continual usage of EIM applications within organisations, as well as the impact of the continuance use decisions on knowledge creation, transfer, and retention within organisations. Our results are useful in developing guidelines and strategies to increase the likelihood of the continuance use of EIM and to improve the potential outcome of its use within organisations.     

An investigation and comparison of machine learning approaches for intrusion detection in IoMT network

The Journal of Supercomputing - Internet of Medical Things (IoMT) is network of interconnected medical devices (smart watches, pace makers, prosthetics, glucometer, etc.), software applications,...     

Oblivious and fair server-aided two-party computation

We show efficient, practical (server-aided) secure two-party computation protocols ensuring privacy, correctness and fairness in the presence of malicious (Byzantine) faults. Our requirements from the server are modest. To ensure privacy and correctness, we only assume a circuit evaluation service, executing an initialisation program provided by both parties. To ensure fairness, we further assume a trusted-decryption service, providing decryption service using a known public key. Our fairness-ensuring protocol is optimistic, i.e., the decryption service is invoked only in case of faults.Both of these trusted services are feasible in practice, and may be useful for additional tasks; both can also be distributed, with linear overhead, for redundancy. We believe that the protocols are sufficiently efficient, to allow deployment, in particular for financial applications. We also propose applications which constitute natural candidates to benefit from our protocols.