Essential Techniques for Basic Analytical Chemistry

Professor Dwight M. Smith demonstrates proper procedures for accurate preparation and handling of solutions for analytical chemistry, including the analytical balance, volumetric glassware, and avoiding contamination. This video provides an opportunity to learn from a master of the techniques.

Ethnobotanical study of the sages used in traditional Valencian medicine and as essential oil: characterization of an endemic Salvia and its contribution to local development

Seven wild and cultivated Salvia species and two Phlomis species, used traditionally in Valencian medicine to treat a variety of external and internal ailments, were studied. New ethnobotanical data are provided, obtained from semistructured interviews with 34 people in the Valencian area. A seasonal characterization of the essential oil of a wild sage, Salvia blancoana Webb & Heldr. subsp. mariolensis Figuerola, by GC-FID and GC-MS was carried out as a means to ensure quality control of endemic traditional species such as this one, which has been commercialized by local industries. A comparison with the essential oil of Salvia lavandulifolia Vahl subsp.lavandulifolia allowed inclusion of the wild sage within the commercial 'Spanish sage' oil.

Acceptability of pandemic A(H1N1) influenza vaccination by Essential Community Workers in 2010 Alicante (Spain), perceived seriousness and sources of information

Objective. Describe acceptability of pandemic A(H1N1) influenza vaccination by Essential Community Workers (ECWs) from Alicante province (Spain) in January 2010. Evaluate the correlation with attitudes, beliefs, professional advice and information broadcasted by media. Method. In this cross-sectional study, face-to-face interviews were conducted with 742 ECWs to assess their attitudes towards vaccination against the pandemic influenza strain. A multivariable regression model was made to adjust the Odds Ratios (ORs). Results. Some ECWs reported having been vaccinated with seasonal vaccine, 21.5% (95%IC 18.6–24.9); only 15.4% (95%IC 12.8–18.4) with the pandemic one. ECWs vaccinated regularly against seasonal flu (OR 5.1; 95%IC 2.9–9.1), those who considered pandemic influenza as a severe or more serious disease than seasonal flu (OR 3.8; 95%IC 2.1–6.7) and those who never had doubts about vaccine safety (OR 3.7; 95%IC2.1–6.7) had a better acceptance of pandemic vaccine. Finally, 78.7% (95%IC 75.1–81.4) had doubts about pandemic vaccine's effectiveness. Conclusion. The vast amount of information provided by the media did not seem to be decisive to prevent doubts or to improve the acceptability of the vaccine in ECWs. Professional advice should be the focus of interest in future influenza vaccination campaigns. These results should be taken into account by health authorities.

A low cost system for the prediagnosis of the human tremor

Human tremor can be defined as a somewhat rhythmic and quick movement of one or more body parts. In some people, it is a symptom of a neurological disorder. From the mathematical point of view, human tremor can be defined as a weighted contribution of different sinusoidal signals which causes oscillations of some parts of the body. This sinusoidal is repeated over time, but its amplitude and frequency change slowly. This is why amplitude and frequency are considered important factors in the tremor characterization, and thus for its diagnosis. In this paper, a tool for the prediagnosis of the human tremor is presented. This tool uses a low cost device (<$40) and allows to compute the main factors of the human tremor accurately. Real cases have been tested using the algorithms developed in this investigation. The patients suffered from different tremor severities, and the components of amplitude and frequency were computed using a series of tests. These additional measures will help the experts to make better diagnoses allowing them to focus on specific stages of the test or get an overview of these tests. From the experimental, we stated that not all tests are valid for every patient to give a diagnosis. Guided by years of experience, the expert will decide which test or set of tests are the most appropriate for a patient.

The EU essential facilities doctrine. Research Papers in Law, 6/2006

Introduction. The essential facilities doctrine may be seen as the ‘extra weight’ which is put onto the balance, in order to give precedence to the maintenance of competition over the complete contractual freedom of undertakings controlling an important and unique facility. The main purpose of the doctrine is to impose upon such ‘dominant’ undertakings the duty to negotiate and/or give access to the facility, against a reasonable fee, to other undertakings, which cannot pursue their own activity (and therefore will perish) without access to such a facility. This very simple description of the content of the doctrine underlines its limitations: through the imposition of a duty to negotiate or contractual obligations, the rule tends to compensate for the weaknesses of the competitive structure of a market, which are due to the existence of some essential facility. In other words, the doctrine does not by itself provide a definitive solution to the lack of competition, but tends to contractually maintain or even create some competition.1 The doctrine of essential facilities originates in the US antitrust case law of the Circuit and District Courts, but has never been officially acknowledged by the Supreme Court. It has been further developed and hotly debated by scholars in the US, both from a legal and from an economic viewpoint. In the EU, the essential facilities doctrine was openly introduced by the Commission during the early 1990s, but has received only limited and indirect support by the Court of First Instance (the CFI) and the European Court of Justice (the ECJ). It also indirectly inspired the legislation concerning the deregulation of traditional ‘natural’ monopolies. The judicial origin of the doctrine, combined with the hesitant application by the appeal courts, both in the US and the EU, cast uncertainty not only on the precise scope of the doctrine, but also on the issue of its very existence. These questions receive a particular light within the EU context, where the doctrine is called upon to play a different role from its US counterpart. In order to address the above issues, we will first pretend that an EU essential facility doctrine does indeed exist and we shall try to identify the scope and content thereof, through its main applications (Section 1). Subsequently, we will try to answer the question whether such a doctrine should exist at all in the EU (Section 2).

EPC Special Collection. Juncker’s Investment Package: essential background reading, 27 November 2014. Collection of papers recently published by the European Policy Centre reflecting on current social, political and economic affairs

This special collection combines the latest publications written by our experts on Europe's investment future. In chronological order, this package follows the developments of how European investment has been dealt with, and what would be needed to make for a more ambitious plan.

An essential partner in the background. Europe in China's policy during the rule of Xi Jinping. OSW STUDIES 56 2016

Chinese elites do not treat Europe as an equal partner and are convinced that China holds the upper hand over Europe. They see a growing asymmetry in bilateral relations. China’s sense of its own potential is boosted by internal divisions within the European Union. At the same time, Europe is China’s key economic partner and an ‘economic pillar’ supporting China’s growth on the international stage. Beijing strives to maintain Europe’s open attitude towards the Chinese economy, in particular its exports, technology transfer to China, location of investments and diversification of China’s currency reserves. Cooperation with Europe and support from Europe are necessary to enable China to improve its position in the international economic and financial system, mainly in order to legitimise China’s actions in the area of multilateralism and global governance. Similarly, Beijing attaches great importance to maintaining Europe’s non-involvement in two issues: China’s core interests and Chinese-American relations.

The Plasmodium serine-type SERA proteases display distinct expression patterns and non-essential in vivo roles during life cycle progression of the malaria parasite

Parasite proteases play key roles in several fundamental steps of the Plasmodium life cycle, including haemoglobin degradation, host cell invasion and parasite egress. Plasmodium exit from infected host cells appears to be mediated by a class of papain-like cysteine proteases called 'serine repeat antigens' (SERAs). A SERA subfamily, represented by Plasmodium falciparum SERA5, contains an atypical active site serine residue instead of a catalytic cysteine. Members of this SERAser subfamily are abundantly expressed in asexual blood stages, rendering them attractive drug and vaccine targets. In this study, we show by antibody localization and in vivo fluorescent tagging with the red fluorescent protein mCherry that the two P. berghei serine-type family members, PbSERA1 and PbSERA2, display differential expression towards the final stages of merozoite formation. Via targeted gene replacement, we generated single and double gene knockouts of the P. berghei SERAser genes. These loss-of-function lines progressed normally through the parasite life cycle, suggesting a specialized, non-vital role for serine-type SERAs in vivo. Parasites lacking PbSERAser showed increased expression of the cysteine-type PbSERA3. Compensatory mechanisms between distinct SERA subfamilies may thus explain the absence of phenotypical defect in SERAser disruptants, and challenge the suitability to develop potent antimalarial drugs based on specific inhibitors of Plasmodium serine-type SERAs.

Essential procedure and requirements for naturalization under the general law.

At head of title: Form C-59 (revised) U.S. Department of Labor. Immigration and Naturalization Service.

Delivering essential health care services in rural areas : an analysis of alternative models /

"May 1991."

Catalogue of medicinal plants and extracts : to which are affixed their most prominent medical properties : also essential oils, and double distilled fragrant waters /

Advertisements for "Compound fluid extract of Sarsaparilla" on p. [4] of wrapper.

Every woman her own lawyer : a private guide in all matters of law, of essential interest to women ... /

Mode of access: Internet.