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A Method for Delivering Spatio-Temporally Focused Energy to a Dynamically Adjustable Target Along a Waveguiding Structure
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It is possible to exploit the frequency-dependent velocity dispersion inherent to waveguiding structures to deliver spatio-temporally focused energy to a spatial target anywhere along the longitudinal extent of a waveguide. Such focusing of energy may have application to technologies as varied as nerve stimulation or chemical etching. A waveguide signal that effects this focused energy is conceptualized and derived. The spatial location of the target acted upon by the waveguide signal is demonstrated to be dynamically adjustable with a linear filtering step. Optimal parameters for waveguide signal generation are derived in...
Source: IEEE Transactions on Signal Processing - February 9, 2010 Category: Biomedical Engineering Source Type: journals
Empirical Mode Decomposition for Trivariate SignalsEmail this article to a colleague.
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An extension of empirical mode decomposition (EMD) is proposed in order to make it suitable for operation on trivariate signals. Estimation of local mean envelope of the input signal, a critical step in EMD, is performed by taking projections along multiple directions in three-dimensional spaces using the rotation property of quaternions. The proposed algorithm thus extracts rotating components embedded within the signal and performs accurate time-frequency analysis, via the Hilbert–Huang transform. Simulations on synthetic trivariate point processes and real-world three-dimensional signals support the analysis.
Source: IEEE Transactions on Signal Processing - February 9, 2010 Category: Biomedical Engineering Source Type: journals
Potential of (2E,7E)-Nonadienedioates
in Asymmetric Synthesis: Construction of Homopipecolic Acid and
an Aminoester Building Block for Peptide Nucleic AcidsEmail this article to a colleague.
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SynlettDOI: 10.1055/s-0029-1219375AbstractA convenient, asymmetric synthesis of ()-homopipecolic
acid methyl ester and an homochiral peptide nucleic acid (PNA) monomer
building block are described, starting from the orthogonally disubstituted
(2,7)-nonadienedioate.
The approach involves stereoselective Michael monoaddition of ()--benzyl--α-methylbenzylamide to the
unsaturated ester as the key step, and subsequent transformation
of the remaining double bond of the unsaturated acid. [...]© Georg Thieme Verlag
Stuttgart ˙ New YorkGet connected:Table of contents | Abstract | Full text
Source: Synlett - February 9, 2010 Category: Chemistry Tags: letter Source Type: journals
Male fertility exam at homeEmail this article to a colleague.
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First step towards microfluidic system for complete quality analysis of semen
Source: Chemistry World | Latest News - February 9, 2010 Category: Chemistry Source Type: journals
Chinese farms 'cause more pollution than factories'Email this article to a colleague.
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Groundbreaking government survey pinpoints fertilisers and pesticides as greater source of water contaminationFarmers' fields are a far bigger source of water contamination in China than factory effluent, the Chinese government revealed today in its first census on pollution.Senior officials said the disclosure, after a two-year study involving 570,000 people, would require a partial realignment of environmental policy from smoke stacks to chicken coops, cow sheds and fruit orchards.Despite the sharp upward revision of figures on rural contamination, the government suggested the country's pollution problem may be close to ...
Source: Guardian Unlimited Science - February 9, 2010 Category: Science Authors: Jonathan Watts Tags: Farming Pollution Pesticides Environment Agriculture Science China World news guardian.co.uk Source Type: news
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In an article in the May–June 2009 American Psychologist, we discussed a new approach to reducing prejudice and encouraging more positive intergroup relations (Crisp & Turner, 2009). We named the approach imagined intergroup contact and defined it as “the mental simulation of a social interaction with a member or members of an outgroup category” (Crisp & Turner, 2009, p. 234). Our proposition is that simply imagining contact with outgroup members can produce more positive perceptions of outgroups. In his commentary, Honeycutt noted that our “article is excellent in its premise” (p. 129), but he was critical of ou...
Source: American Psychologist - February 9, 2010 Category: Psychiatry & Psychology Authors: Crisp, Richard J.; Turner, Rhiannon N. Source Type: journals
Comparative analysis of gait and speech in Parkinson's disease: hypokinetic or dysrhythmic disorders?Email this article to a colleague.
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Gait and speech are automatic motor activities which are frequently impaired in Parkinson's disease. Obvious clinical similarities exist between these disorders but were never investigated. We propose to determine whether there exist any common features in Parkinson's disease between spatiotemporal gait disorders and temporal speech disorders.
Gait and speech were analysed on 11 Parkinsonian patients (PP) undergoing deep-brain stimulation of the subthalamic nucleus (STN-DBS) and 11 control subjects under three conditions of velocity (natural, slow and speed). The patients were tested with and without l-dopa and stimulator ...
Source: Journal of Neurology, Neurosurgery & Psychiatry - February 9, 2010 Category: Neurosurgery Authors: Cantiniaux, S., Vaugoyeau, M., Robert, D., Horrelou-Pitek, C., Mancini, J., Witjas, T., Azulay, J.-P. Tags: Drugs: CNS (not psychiatric), Parkinson's disease Research paper Source Type: journals
New conference for new look SocietyEmail this article to a colleague.
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The Royal Pharmaceutical Society (RPS) is launching a brand new conference, in step with its changing face as a professional body, to be held at Imperial College in London on Sunday 5th and Monday 6th September 2010.
Source: Royal Pharmaceutical Society of Great Britain - February 9, 2010 Category: Drugs & Pharmacology Source Type: organizations
Will earlier springs throw nature out of step?Email this article to a colleague.
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The recent trend towards earlier UK springs and summers has been accelerating, according to a new study. The research is the most comprehensive and rigorous assessment so far of long-term changes in the seasonal timing of biological events across marine, freshwater and terrestrial environments in the UK.
Source: ScienceDaily Headlines - February 9, 2010 Category: Science Source Type: news
GeoVax Labs, Inc. Begins Enrollment At Final Site For Preventative Vaccine; Next Step Is To Submit IND Application For Therapeutic Vaccine To FDAEmail this article to a colleague.
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GeoVax Labs, Inc. (OTC Bulletin Board: GOVX) (the "Company"), an Atlanta-based, biopharmaceutical company developing human vaccines for diseases caused by HIV-1 (Human Immunodeficiency Virus) and other infectious agents, provided an update on its vaccine trials progress. "The HIV/AIDS population continues to grow at an alarming rate, 60,000 new infections annually, and that's just in the United States. Preventing the spread of this disease and controlling infections through the development of vaccines remains our mission and our goal," stated Robert McNally, Ph.D...
Source: Health News from Medical News Today - February 9, 2010 Category: Consumer Health News Tags: HIV / AIDS Source Type: news
Loyola Trauma Surgeon Warns That Texting-On-The-Go Could Be DeadlyEmail this article to a colleague.
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Siobhan Wicks was texting her roommate while walking down the stairs in her Aurora home when suddenly her world turned topsy turvy. "I missed a step. I have no idea how it happened but all I know is I was on the floor," said the 29-year-old Wicks. "I'm a physical therapist so I knew immediately that I had broken my toe. I knew something had happened because it hurt. I took my sock off and, yep, my toe was dislocated." After collecting herself, Wicks called her roommate at work who rushed home and took her to the hospital where her foot was placed in an orthopedic shoe to heal...
Source: Health News from Medical News Today - February 9, 2010 Category: Consumer Health News Tags: Public Health Source Type: news
GeoVax Labs, Inc. Begins Enrollment At Final Site For Preventative Vaccine; Next Step Is To Submit IND Application For Therapeutic Vaccine To FDAEmail this article to a colleague.
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GeoVax Labs, Inc. (OTC Bulletin Board: GOVX) (the "Company"), an Atlanta-based, biopharmaceutical company developing human vaccines for diseases caused by HIV-1 (Human Immunodeficiency Virus) and other infectious agents, provided an update on its vaccine trials progress...
Source: Immune System / Vaccines News From Medical News Today - February 9, 2010 Category: Allergy & Immunology Tags: HIV / AIDS Source Type: news
Loyola Trauma Surgeon Warns That Texting-On-The-Go Could Be DeadlyEmail this article to a colleague.
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Siobhan Wicks was texting her roommate while walking down the stairs in her Aurora home when suddenly her world turned topsy turvy. "I missed a step. I have no idea how it happened but all I know is I was on the floor," said the 29-year-old Wicks. "I'm a physical therapist so I knew immediately that I had broken my toe. I knew something had happened because it hurt...
Source: Public Health News From Medical News Today - February 9, 2010 Category: Primary Care Tags: Public Health Source Type: news
Evolution impacts environment: Fundamental shift in how biologists perceive relationship between evolution and ecologyEmail this article to a colleague.
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The traditional view is that ecology shapes evolution. Some research has suggested, however, that evolutionary processes reciprocate by influencing ecology in turn. Now biologists present evidence that ecology and evolution are indeed reciprocally interacting processes, presenting a fundamental shift in our understanding of the relationship between evolution and ecology. The results represent a first significant step in showing that evolution cannot be ignored when studying ecological interactions.
Source: ScienceDaily Headlines - February 9, 2010 Category: Science Source Type: news
The Advantages of Being HelplessEmail this article to a colleague.
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At every stage of early development, human babies lag behind infants from other species. A kitten can amble across a room within moments of birth and catch its first mouse within weeks, while its wide-eyed human counterpart takes months to make her first step, and years to learn even simple tasks, such as how to tie a shoelace or skip a rope, let alone prepare a three-course meal. Yet, in the cognitive race, human babies turn out to be much like the tortoise in Aesop’s fable: emerging triumphant after a slow and steady climb to the finish. As adults, we drive fancy sports cars, leap nimbly across football ...
Source: Scientific American - Official RSS Feed - February 9, 2010 Category: Science Tags: Mind & Brain,Language Linguistics,Language Source Type: journals
Effect of chronic treatment with Rosiglitazone on Leydig cell steroidogenesis in rats: in vivo and ex vivo studiesEmail this article to a colleague.
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Conclusion:
The results revealed that the Leydig cells from rosiglitazone-treated rats showed significant reduction in testosterone production under basal, hCG/dbcAMP- or 22 (R)-OH-C/pregnenolone-induced conditions, although increased labeling of StAR and P450scc was detected in these cells by immunocytochemistry. The ultrastructural study suggested that the lower levels of testosterone produced by these cells could be due to mitochondrial damage induced by rosiglitazone.
Source: Reproductive Biology and Endocrinology - February 9, 2010 Category: Endocrinology Authors: Janaina CoutoKarina SaraivaCleiton BarrosDaniel UdrisarChristina PeixotoJuliany Cesar VieiraMaria LimaSuely GaldinoIvan PittaMaria Wanderley Source Type: journals
Improving benchmarking by using an explicit framework for the development of composite indicators: an example using pediatric quality of careEmail this article to a colleague.
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Conclusions:
The framework presented offers researchers an explicit path to composite indicator development. Without a scientifically robust and comprehensive approach to measurement of the quality of healthcare, performance measurement will ultimately fail to achieve its quality improvement goals.
Source: Implementation Science - February 9, 2010 Category: Health Management Authors: Jochen ProfitKatri TyppoSylvia HysongLeChauncy WoodardMichael KallenLaura Petersen Source Type: journals
Humanities in gross anatomy project: A novel humanistic learning tool at Des Moines UniversityEmail this article to a colleague.
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Gross anatomy affords physical therapy students an opportunity to discover human morphology by intimately studying the dead. Moreover, it also exposes future physical therapists to the humanistic aspects of the profession. In 2007, anatomy faculty decided to socialize students to the humanities with a new course requirement: Humanities in Gross Anatomy Project (HuGA) Project. At the end of the course, students, either individually or as a group, submitted a project that described how they had been personally touched by the donor's gift and how the gift contributed to their professional growth and education. The submission ...
Source: Anatomical Sciences Education - February 9, 2010 Category: Anatomy Authors: Craig A. Canby, Traci A. Bush Source Type: journals
Auburn Brings Hoops for a Good CauseEmail this article to a colleague.
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Women's Basketball Invites Fans To The 'Pink Zone' Sunday Against LSU
Tigers help raise awareness of breast cancer
AUBURN - The Auburn women's basketball team (12-12, 3-8 SEC) is asking fans to step into the "Pink Zone" on Sunday when it hosts LSU (15-...
Source: OrlandoSentinel: Medical Research - February 8, 2010 Category: American Health Source Type: news
Ardent Bement, NSF Director, To Step DownEmail this article to a colleague.
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Personnel: Bush appointee will leave on June 1 to move to Purdue University.
Source: Chemical and Engineering News - February 8, 2010 Category: Chemistry Source Type: journals
Vital Signs: Risks: Study Looks at Serotonin and SIDS DeathsEmail this article to a colleague.
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Researchers are a step closer to understanding why babies who appear to be perfectly healthy may die suddenly.
Source: NYT > Health - February 8, 2010 Category: Consumer Health News Authors: By RONI CARYN RABIN Tags: Sudden Infant Death Syndrome Serotonin (Chemical) Babies Deaths (Fatalities) Medicine and Health Source Type: news
Genetics behind ageing probedEmail this article to a colleague.
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Conclusion
This study increases the information we have about the biology of ageing. In particular, it shows an association between a gene variation and short telomeres (which have a known association with ageing).
The study was well conducted and the results are reliable. The researchers have used recognised methods in this field of research and checked their initial findings in several different separate groups of people to confirm the validity of their early associations. Their ultimate conclusion is also based on the variants that were significant across all of the cohorts analysed.
It is important to remember that w...
Source: NHS News Feed - February 8, 2010 Category: Consumer Health News Tags: Genetics/stem cells Older people Source Type: news
Did bacteria developed into more complex cells much earlier in evolution than thought?Email this article to a colleague.
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Biochemists have described the process by which bacteria developed into more complex cells and found this crucial step happened much earlier in the evolutionary timeline than previously thought.
Source: ScienceDaily Headlines - February 8, 2010 Category: Science Source Type: news
Self-operated endovaginal telemonitoring (SOET): a step towards more patient-centred ART?Email this article to a colleague.
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The need for serial vaginal sonographies to monitor ovarian stimulation for artificial reproductive technology (ART) treatments remains a major practical and organizational drawback both for patients and health-care providers. We explore the possibility of patients and/or their partners performing their own vaginal sonographies at home. To make this a reality, a portable, easy-to-use, home-applied vaginal probe for recording relevant images would have to be developed, as well as appropriate software to transfer images using modern communication technology to the centre, to analyse the recordings and to send a swift structu...
Source: Human Reproduction - February 8, 2010 Category: Reproduction Medicine Authors: Gerris, J., De Sutter, P. Tags: OPINION Source Type: journals
Serial transverse enteroplasty procedure (STEP) for bowel lengthening in parenteral nutrition-dependent childrenEmail this article to a colleague.
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Aims: In children, some diseases may result in abnormally short bowel. The medical name for this condition is short bowel syndrome (SBS). This can cause severe nutritional problems because of insufficient absorption of food. Serial transverse enteroplasty is an operation where the bowel is cut and stapled in a zig-zag pattern in order to narrow and lengthen it. Intended audience: Paediatric surgeons. Publication history information: Published on 26 September 2007. NICE Interventional Procedure Guidance 232. Access: Available to the general public.
Source: NHS Evidence - gastroenterology and liver diseases - Updates for Therapeutic Nutrition - February 8, 2010 Category: Gastroenterology Source Type: organizations
Opinion: IVAWA Marks 'First Step' Towards Making Women Central Focus Of U.S. Foreign PolicyEmail this article to a colleague.
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In a Politico opinion piece, Sen. John Kerry (D-Mass.) and Rep. Bill Delahunt (D-Mass.), lead sponsors of the International Violence Against Women Act (IVAWA), together with Larry Cox and Kerry Kennedy of Amnesty International USA, reflect on the significance of the legislation introduced in the House and Senate on Thursday...
Source: Health News from Medical News Today - February 8, 2010 Category: Consumer Health News Tags: Women's Health / Gynecology Source Type: news
An Answer To Another Of Life's Big QuestionsEmail this article to a colleague.
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Monash University biochemists have found a critical piece in the evolutionary puzzle that explains how life on Earth evolved millions of centuries ago. The team, from the School of Biomedical Sciences, has described the process by which bacteria developed into more complex cells and found this crucial step happened much earlier in the evolutionary timeline than previously thought...
Source: Health News from Medical News Today - February 8, 2010 Category: Consumer Health News Tags: Biology / Biochemistry Source Type: news
Opinion: IVAWA Marks 'First Step' Towards Making Women Central Focus Of U.S. Foreign PolicyEmail this article to a colleague.
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In a Politico opinion piece, Sen. John Kerry (D-Mass.) and Rep. Bill Delahunt (D-Mass.), lead sponsors of the International Violence Against Women Act (IVAWA), together with Larry Cox and Kerry Kennedy of Amnesty International USA, reflect on the significance of the legislation introduced in the House and Senate on Thursday...
Source: Women's Health / OBGYN News From Medical News Today - February 8, 2010 Category: OBGYN Tags: Women's Health / Gynecology Source Type: news
GPs set up company to prevent 'McDonald's-style' practicesEmail this article to a colleague.
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An LMC is taking the extraordinary step of setting up a company to run out-of-contract practices on a short term basis – to block private sector companies stepping in.
Source: Pulse - February 8, 2010 Category: Primary Care Tags: News Source Type: news
Homology-dependent interactions determine the order of strand exchange by IntDOT recombinaseEmail this article to a colleague.
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The Bacteroides conjugative transposon CTnDOT encodes an integrase, IntDOT, which is a member of the tyrosine recombinase family. Other members of this group share a strict requirement for sequence identity within the region of strand exchange, called the overlap region. Tyrosine recombinases catalyze recombination by making an initial cleavage, strand exchange and ligation, followed by strand swapping isomerization requiring sequence identity in the overlap region, followed by the second cleavage, strand exchange and ligation. IntDOT is of particular interest because it has been shown to utilize a three-step mechanism: a ...
Source: Nucleic Acids Research - February 8, 2010 Category: Research Authors: Laprise, J., Yoneji, S., Gardner, J. F. Tags: Nucleic Acid Enzymes Source Type: journals
Will earlier springs throw nature out of step?Email this article to a colleague.
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(Centre for Ecology & Hydrology) The recent trend towards earlier UK springs and summers has been accelerating, according to a study published today in the scientific journal Global Change Biology. The collaborative study, involving scientists from 12 UK research institutions, universities and conservation organisations, is the most comprehensive and rigorous assessment so far of long-term changes in the seasonal timing of biological events across marine, freshwater and terrestrial environments in the UK.
Source: EurekAlert! - Biology - February 8, 2010 Category: Biology Source Type: news
Building generic anatomical models using virtual model cutting and iterative registrationEmail this article to a colleague.
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Conclusions:
Our method is very flexible and easy to use such that anyone can use image stacks to create models and retrieve a sub-region from it at their ease. Java-based implementation allows our method to be used on various visualization systems including personal computers, workstations, computers equipped with stereo displays, and even virtual reality rooms such as the CAVE Automated Virtual Environment. The technique allows biologists to build generic 3D models of their interest quickly and accurately.
Source: BMC Medical Imaging - Latest articles - February 8, 2010 Category: Radiology Authors: Mei XiaoJung SohOscar Meruvia-PastorEric SchmidtBenedikt HallgrimssonChristoph Sensen Source Type: journals
Scientist: Autism Paper Had Catastrophic EffectsEmail this article to a colleague.
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The prestigious British medical journal Lancet took a rare step this week: It retracted a 1998 paper that sparked a firestorm about potential links between vaccines and autism. That paper has been a bane to Dr. Paul Offit, co-inventor of the rotavirus vaccine and chief of infectious diseases at Children's Hospital in Philadelphia. Offit tells host Guy Raz why he thinks the paper was a disaster for parents seeking answers about autism.» E-Mail This » Add to Del.icio.us
Source: NPR Health and Science - February 7, 2010 Category: Consumer Health News Source Type: news
Perceptual decision making in less than 30 milliseconds. - Stanford TR, Shankar S, Massoglia DP, Costello MG, Salinas E.Email this article to a colleague.
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In perceptual discrimination tasks, a subject's response time is determined by both sensory and motor processes. Measuring the time consumed by the perceptual evaluation step alone is therefore complicated by factors such as motor preparation, task diff...
Source: SafetyLit: All (Unduplicated) - February 7, 2010 Category: Global & Universal Tags: Distraction, Fatigue, Chronobiology, Vigilance, Workload Source Type: info
Secondary tasks impair adaptation to step- and gradual-visual displacements. - Galea JM, Sami SA, Albert NB, Miall RC.Email this article to a colleague.
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Motor adaptation is impaired by the performance of a secondary task which divides cognitive resources. Additionally, we previously reported slowed adaptation when participants were required to switch from one visual displacement adaptation task to anoth...
Source: SafetyLit: All (Unduplicated) - February 7, 2010 Category: Global & Universal Tags: Distraction, Fatigue, Chronobiology, Vigilance, Workload Source Type: info
Ultrafast nanotube based diffusiophoresis nanomotorsEmail this article to a colleague.
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Wei Liu, Rongxiang He, Hongwei Zhu, Hao Hu, Meiya Li et al. Nanomotors represent a significant step forward in nanotechnology, and prove that nanotubes and other nanostructures several hundred times smaller than the diameter of a human hair can be manipulated and assembled into true devices. In this letter, nanotubes based nanomotors are reported. The nanomo ... [Appl. Phys. Lett. 96, 053114 (2010)] published Fri Feb 5, 2010.
Source: Applied Physics Letters - February 6, 2010 Category: Physics Source Type: journals
Straightforward Access to α-Methylamines
through Cross-MetathesisEmail this article to a colleague.
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SynthesisDOI: 10.1055/s-0029-1218672AbstractA two-step procedure involving cross-metathesis and reductive
amination enables easy access to α-methylamines and α,α′-dimethyldiamines
from a wide variety of terminal olefins.[...]© Georg Thieme Verlag
Stuttgart ˙ New YorkGet connected:Table of contents | Abstract | Full text
Source: Synthesis - February 6, 2010 Category: Chemistry Tags: paper Source Type: journals
Three Years Out, Safety Checklist Continues to Keep Hospital Infections in Check-2/4/10Email this article to a colleague.
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The state of Michigan, which used a five-step checklist developed at Johns Hopkins to virtually eliminate bloodstream infections in its hospitals’ intensive care units , has been able to keep the number of these common, costly and potentially lethal infections near zero — even three years after first adopting the standardized procedures.
Source: Johns Hopkins Medicine News - February 6, 2010 Category: Research Source Type: news
Peptide Signaling in Pollen-Pistil InteractionsEmail this article to a colleague.
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Plant fertilization is achieved through the involvement of various pollen–pistil interactions. Self-/non-self-recognition in pollination is important to avoid inbreeding, and directional and sustainable control of pollen tube growth is critical for the pollen tube to deliver male germ cells. Recently, various secreted peptides (polypeptides) have been reported to be involved in cell–cell communication of pollen–pistil interactions. These include determinants of self-incompatibility, factors for pollen germination and tube growth, and pollen tube attractants. Interestingly, many of them are cysteine-rich p...
Source: Plant and Cell Physiology - February 6, 2010 Category: Cytology Authors: Higashiyama, T. Tags: Mini-Review Source Type: journals
Surgery of Larynx and TracheaEmail this article to a colleague.
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Written by internationally recognized opinion leaders of the field, this comprehensive textbook covers all the subspecialities of laryngology, from phonosurgery to cancer. Each surgical procedure is explained and well illustrated in a step-by-step manner. Moreover, different surgical methods such as endoscopic versus open surgery and the use of cold instrument versus laser are evaluated so ...
Source: Springer Medicine titles - February 6, 2010 Category: Databases & Libraries Tags: Otorhinolaryngology Source Type: organizations
Andrew Wakefield, Scientific Censorship, and Fourteen Monkeys; A statement by Jenny McCarthy and Jim CarreyEmail this article to a colleague.
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(NaturalNews) When it comes to vaccines, Jenny McCarthy and Jim Carrey get it. They see how the pharma industry is engineering a campaign to silence Dr. Andrew Wakefield in order to suppress the publication of startling new evidence linking vaccines to severe neurological damage.At great risk to their professional careers, Jenny McCarthy and Jim Carrey have found the courage to dare to tell the truth about vaccines and autism. Despite the vicious attacks by the pro-vaccine zealots who will stop at nothing to destroy anyone who challenges conventional vaccine mythology, McCarthy and Carrey have issued a powerful, inspired s...
Source: NaturalNews.com - February 6, 2010 Category: Consumer Health Advice Source Type: news
Modification of Tp-e and QTc intervals during caesarean section under spinal anaesthesiaEmail this article to a colleague.
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There are no guidelines for the anaesthetic management of caesarean section in women with long QT syndrome; the description of myocardial ventricular repolarisation in healthy women during caesarean delivery could be a first step. The aim of this study was to describe modification of the QT interval, corrected for heart rate, and the interval between the peak and the end of the T-wave (Tpeak[ndash]Tend interval) during caesarean section under spinal anaesthesia. We studied 40 patients scheduled for caesarean section under spinal anaesthesia. Patients were randomly assigned to receive either ephedrine or phenylephrine to pr...
Source: Anaesthesia - February 6, 2010 Category: Anesthesiology Authors: A. Guillon, S. Leyre, F. Remérand, B. Taihlan, F. Perrotin, J. Fusciardi, M. Laffon Source Type: journals
Evaluation of sample preparation methods for elastomer digestion for further halogens determination.Email this article to a colleague.
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In this work, three sample preparation methods were evaluated for further halogen determination in elastomers containing high concentrations of carbon black. Samples of nitrile-butadiene rubber, styrene-butadiene rubber, and ethylene-propylene-diene monomer elastomers were decomposed using oxygen flask combustion and microwave-induced combustion (MIC) for further Br and Cl determination by ion chromatography (IC), inductively coupled plasma optical emission spectrometry (ICP OES), and inductively coupled plasma mass spectrometry (ICP-MS). Extraction assisted by microwave radiation in closed vessels was also evaluated u...
Source: Analytical and Bioanalytical Chemistry - February 6, 2010 Category: Chemistry Authors: Moraes DP, Pereira JS, Diehl LO, Mesko MF, Dressler VL, Paniz JN, Knapp G, Flores EM Tags: Anal Bioanal Chem Source Type: journals
Living Near Normal Life Spans with HIVEmail this article to a colleague.
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The results of a new study are being published in the Journal of the American Medical Association, and it relates different issues dealing with the AIDS epidemic and drugs that were introduced to fight the symptoms of the disease in the 1990's. The most notable item to come out of this study is that the life expectancy of people with HIV is nearing that of people without the disease. Experts agree that HIV medication cocktails are the reason HIV life expectancies are getting longer. Read more in this article from EON of Canada.
Related Information
How is HIV Treated?
Taking Your Medications Each and Every Day
A...
Source: About AIDS / HIV - February 6, 2010 Category: Consumer Health Advice Source Type: consumer
Rectification of the EMG Signal Impairs the Identification of Oscillatory Input to the MuscleEmail this article to a colleague.
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Rectification of EMG signals is a common processing step used when performing electroencephalographic–electromyographic (EEG–EMG) coherence and EMG–EMG coherence. It is well known, however, that EMG rectification alters the power spectrum of the recorded EMG signal (interference EMG). The purpose of this study was to determine whether rectification of the EMG signal influences the capability of capturing the oscillatory input to a single EMG signal and the common oscillations between two EMG signals. Several EMG signals were reconstructed from experimentally recorded EMG signals from the surface of the fi...
Source: Journal of Neurophysiology - February 5, 2010 Category: Neurology Authors: Neto, O. P., Christou, E. A. Tags: Articles Source Type: journals
Motor Patterns During Walking on a Slippery WalkwayEmail this article to a colleague.
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Friction and gravity represent two basic physical constraints of terrestrial locomotion that affect both motor patterns and the biomechanics of bipedal gait. To provide insights into the spatiotemporal organization of the motor output in connection with ground contact forces, we studied adaptation of human gait to steady low-friction conditions. Subjects walked along a slippery walkway (7 m long; friction coefficient ~= 0.06) or a normal, nonslippery floor at a natural speed. We recorded gait kinematics, ground reaction forces, and bilateral electromyographic (EMG) activity of 16 leg and trunk muscles and we mapped the rec...
Source: Journal of Neurophysiology - February 5, 2010 Category: Neurology Authors: Cappellini, G., Ivanenko, Y. P., Dominici, N., Poppele, R. E., Lacquaniti, F. Tags: Articles Source Type: journals
Merging of Healthy Motor Modules Predicts Reduced Locomotor Performance and Muscle Coordination Complexity Post-StrokeEmail this article to a colleague.
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Evidence suggests that the nervous system controls motor tasks using a low-dimensional modular organization of muscle activation. However, it is not clear if such an organization applies to coordination of human walking, nor how nervous system injury may alter the organization of motor modules and their biomechanical outputs. We first tested the hypothesis that muscle activation patterns during walking are produced through the variable activation of a small set of motor modules. In 20 healthy control subjects, EMG signals from eight leg muscles were measured across a range of walking speeds. Four motor modules identified t...
Source: Journal of Neurophysiology - February 5, 2010 Category: Neurology Authors: Clark, D. J., Ting, L. H., Zajac, F. E., Neptune, R. R., Kautz, S. A. Tags: Articles Source Type: journals
A Contribution of Area 5 of the Posterior Parietal Cortex to the Planning of Visually Guided Locomotion: Limb-Specific and Limb-Independent EffectsEmail this article to a colleague.
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We tested the hypothesis that area 5 of the posterior parietal cortex (PPC) contributes to the planning of visually guided gait modifications. We recorded 121 neurons from the PPC of two cats during a task in which cats needed to process visual input to step over obstacles attached to a moving treadmill belt. During unobstructed locomotion, 64/121 (53%) of cells showed rhythmic activity. During steps over the obstacles, 102/121 (84%) of cells showed a significant change of their activity. Of these, 46/102 were unmodulated during the control task. We divided the 102 task-related cells into two groups on the basis of their d...
Source: Journal of Neurophysiology - February 5, 2010 Category: Neurology Authors: Andujar, J.-E., Lajoie, K., Drew, T. Tags: Articles Source Type: journals
