Download or read book Analysis of Endogenous Steroids in Hair Using HPLC MS MS written by Maj Berg Keller and published by . This book was released on 2016 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hair Analysis in Clinical and Forensic Toxicology written by Pascal Kintz and published by Academic Press. This book was released on 2015-06-25 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hair Analysis in Clinical and Forensic Toxicology is an essential reference for toxicologists working with, and researching, hair analysis. The text presents a review of the most up-to-date analytical methods in toxicological hair analysis, along with state-of-the-art developments in the areas of hair physiology, sampling, and pre-treatments, as well as discussions of fundamental issues, applications, and results interpretation. Topics addressed include the diagnosis of chronic excessive alcohol drinking by means of ethyl glucuronide (EtG) and fatty acid ethyl esters (FAEE), the early detection of new psychoactive substances, including designer drugs, the development of novel approaches to screening tests based on mass spectrometry, and the detection of prenatal exposure to psychoactive substances from the analysis of newborn hair. - Unites an international team of leading experts to provide an update on the cutting-edge advances in the toxicological analysis of hair - Demonstrates toxicological techniques relating to a variety of scenarios and exposure types - Ideal resource for the further study of the psychoactive substances, drug-facilitated crimes, ecotoxicology, analytical toxicology, occupational toxicology, toxicity testing, and forensic toxicology - Includes detailed instructions for the collection, preparation, and handling of hair, and how to best interpret results

Download or read book Hair Analysis written by and published by . This book was released on 2001 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hair Growth and Disorders written by Ulrike Blume-Peytavi and published by Springer Science & Business Media. This book was released on 2008-06-26 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hair disorders have become a central social and psychological issue and patients now have increasing demands and expectations. Written by world-renowned experts, this lavishly illustrated book provides the latest scientific aspects of hair biology, up to date knowledge on hair diagnosis and treatment options as well as hair removal and restoration techniques. The content is divided into three sections: basic aspects of hair growth; hair and scalp disorders; and fotoepilation, surgery and hair cosmetics. In addition, coverage is enhanced with unique sections on hair in different ages and in art, on ethnic hair and in forensic investigations.

Download or read book Analytical and Practical Aspects of Drug Testing in Hair written by Pascal Kintz and published by CRC Press. This book was released on 2006-08-30 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many advances have been made since the publication of Drug Testing in Hair. The mid-1990s witnessed the progress in cannabis detection while the late 1990s focused on benzodiazepines detection and the applications in doping control. In more recent years, toxicologists centered on the detection in hair of a single exposure and the related applicatio

Download or read book Steroid Analysis written by Hugh L. J. Makin and published by Springer Science & Business Media. This book was released on 2010-06-04 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this handbook concentrates on the analysis of steroids in biological fluids. It offers analysis of low levels of steroid analytes in biological fluids. This new edition also provides an extra chapter on pharmaceutical aspects of steroid analysis. Coverage details spectroscopic and other methods, including UV and IR absorption spectroscopy, NMR spectroscopy, mass spectrometry, X-ray diffraction, chromatography and immunoassay of steroids.

Download or read book The Biology of Hair Growth written by William Montagna and published by Elsevier. This book was released on 2013-09-24 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Biology of Hair Growth is based on a conference on The Biology of Hair Growth, sponsored by the British Society for Research on Ageing, held at the Royal College of Surgeons, in London, 7-9 August 1957. The papers presented at this conference, and a few others, have been gathered in this book to serve as a source reference for all those interested in research on hair and hair growth. The application of modern methods in histology, cytology, histochemistry, physiology, electron microscopy, the use of radioactive isotopes, and modern biochemical techniques have given greater insight into the phenomena of growth and differentiation of hair follicles than ever before. The book opens with a chapter on the embryology of hair. Separate chapters follow on the anatomy and histochemistry of the hair follicle; the electron microscopy of keratinized tissues; the chemistry of keratinization; the mitotic activity of the follicle; and the the vascularity and patterns of growth of hair follicles. Subsequent chapters deal with behavior of pigment cells and epithelial cells in the hair follicle; the nature of hair pigment; the effects of nutrition on hair growth; and effects of chemical agents, ionizing radiation, and particular illnesses on hair roots.

Download or read book Disorders of Hair Growth written by Elise A. Olsen and published by McGraw-Hill Professional Publishing. This book was released on 2003 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only comprehensive book on the subject of hair loss! Highly illustrated, with 250 new color photographs, this resource covers the basic science, diagnosis, and treatment of all problems related to hair. Conditions covered include childhood hair loss, excessive body hair, various types of adult balding, and loss due to medical conditions, trauma, and medications. The new Second Edition emphasizes various new diagnosis and treatment methods including popular, recently approved remedies.

Download or read book Hair Analysis for Drugs of Abuse written by Ping Xiang and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis covers a range of important issues in hair analysis and includes 27 scientific works in which the name of the candidate was either listed as the first author or as the major contributor. The work presented in this thesis involved the development of a series of analytical methods to detect trace amounts of drugs in hair and also investigated the mechanisms by which drugs may be incorporated into hair. The major areas covered in this study can be summarized as follows: 1. The methods for the identification and quantification of opiates, amphetamines, ketamine, cannabis, cocaine, benzodiazepines, antidepressants, antipsychotics, and anabolic steroids in hair were developed using gas chromatography-mass spectrometry (GC-MS), liquid chromatography-tandem mass spectrometry (LC-MS/MS) and gas chromatography-tandem mass spectrometry (GC-MS/MS). With GC-MS methods, the limits of detection were 0.1-0.5 ng mg-1 of hair for antidepressants and antipsychotics. For illegal drugs, hair specimens were analyzed by GC-MS with limits of detection of 0.02-2ng mg-1. GC/MS/MS is more sensitive than GC-MS to detect these drugs in hair. The lower limits of detection ranged from 0.001 to 0.020 ng mg-1 for 21 anabolic androgenic steroids and their esters in hair using liquid chromatographic-tandem mass spectrometric method. And the limits of detection ranged from 0.2 to 5 pg mg-1 for benzodiazepines in hair. Tandem mass spectrometry is characterized by its sensitivity, selectivity and specificity, which makes it particularly suitable for the analysis of trace amount of target analytes in hair. 2. Usually, screening for drugs of abuse is the first step in clinical and forensic toxicology. There are a large number of controlled substances and doping agents and novel compounds, which have yet to be characterised. A series of screening methods for drugs of abuse in hair were developed using LC-MS/MS and GC-MS/MS. Using our own library of MRM transitions, the optimum collision energies selected for each transition and retention times were set up. These methods have been applied successfully in forensic casework. 3. Of growing importance to the field of hair analysis is the detection of metabolites related to the parent drugs. Demonstrating the presence of a metabolite of a drug (such as, heroin, amphetamines, cocaine, meperidine, ketamine, triazolam or psychotropic drugs) provides compelling evidence for exposure to the parent drug, and permits distinction between external contamination from ingestion and facilitation of the interpretation of results. The presence of antidepressant and antipsychotic drugs and their metabolites in the hair of psychiatric patients was investigated using GC-MS-EI and GC-MS-PCI. The parent drug and its major metabolite, such as opiates (morphine, 6-acetylmorphine), methamphetamine (methamphetamine, amphetamine), ketamine (ketamine, norketamine), cocaine (cocaine, benzoecognine), meperidine (meperidine, normeperidine), triazolam (triazolam, [alpha]-hydroxytriazolam), and clonazepam (clonazepam, 7-aminoclonazepam) were quantified in authentic hair samples simultaneously. The differences were finding in the ratio of parent drug to metabolite. For illegal drugs, the concentrations of parent drugs were higher than that of their metabolites. The results of triazolam and clonazepam were contrary. These data are suitable reference values and are the basis for the interpretation of results. 4. The mechanisms by which drugs are incorporated into hair are not fully understood. Based on experiments with guinea pigs with black, white, or brown hair, the mechanisms of incorporation of cocaine, methamphetamine, ketamine, triazolam and anabolic steroids into hair were investigated. The concentrations of drugs in hair were found to be related to physicochemical properties of drugs. The parent drugs were the predominant analytes in hair. There was an obvious relationship between the concentration of drugs in hair and hair pigmentation. The concentrations of drugs deposited in black hair was found to be higher than that in brown and white hair samples, even when comparing results using hairs on the same multicoloured animal body. This work confirmed that melanin affinity is a governing factor in drug incorporation into hair shafts. These studies on the distribution of drugs in the hair shaft and how their concentration changes along the shaft provide information relevant to the time of ingestion and substance use/abuse. 5. In recent years an increase in drug-facilitated sexual assault (DFSA) has been reported. Segmental hair analysis has proved useful in widening the window of detection, as blood and urine analyses are of limited use, due to the long delays between the actual assaults and obtaining samples from suspects that are frequently encountered in investigations of such crimes. In China, benzodiazepines are the most frequently observed compounds in cases of drug-facilitated crime. In a paper reported here, 14 volunteers ingested a single 1-6 mg estazolam tablet to permit the evaluation of segmental hair analysis after a single drug dosage. Hair was collected one month after administration of the drug. All the proximal segments tested positive for estazolam. With increased dosage, estazolam could be detected in the 2-4 cm segments nearest the hair root in some subject's hair shafts. In some cases, the 4-6 cm segments also tested positive. Hair analysis was applied to samples from two authentic criminal cases. A significant variation was observed between those obtained from previous studies and the results presented here. The intersubject variability in segmental analysis can be explained mainly due to melanin content and diffusion from sweat or other secretions during formation of the hair shaft. However, more substantial procedural and interpretation guidelines are required to use segmental hair analysis in drug-facilitated crimes. On the other hand, the minimal dosage for detection, which is a critical but previously unknown threshold value of fundamental importance in hair analysis, was determined for triazolam and ketamine in guinea pig hair. 6. Doping with endogenous anabolic steroids is one of the most serious drug issues in sports today. The measurement of anabolic steroid levels in human hair permits the distinction between pharmaceutically produced steroids and naturally occurring steroids. Full-length hair samples were taken at the skin surface from the vertex of 39 males, 30 females and 11 children from China. None of the subjects were professional athletes. Testosterone and dehydroepiandrosterone were detected in all the hair segments. The physiological concentrations of testosterone were in the range 0.8-24.2 pg mg-1, 0.1-16.8 pg mg-1 and 0.2-11.5 pg mg-1 in males, females and children, respectively. However, the mean values of dehydroepiandrosterone were much higher than those for testosterone. This is the first investigation into the physiological concentrations of anabolic steroids in human hair in Chinese subjects. These data provide suitable reference values and form the basis for the interpretation of results from investigations into the abuse of endogenous anabolic steroids. In conclusion, the work presented in this study demonstrates that there was a good correlation between the concentration of drugs in hair and drug dosage. There was an obvious relationship between hair drug concentration and hair colour. Melanin affinity is shown to be a governing factor in determining drug incorporation into hair, and the concentration of drugs deposited in black hair was found to be higher than that in brown and white hair samples. This thesis provides data that will be useful in the application of hair analysis regarding drugs of abuse and in the interpretation of toxicological results.

Download or read book Polar Bears written by Andrew E. Derocher and published by JHU Press. This book was released on 2012-03-08 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents an introduction to the polar bear, discussing its evolution, physical characteristics, life cycle, predatory behavior, habitat, and the threats to its existence from global warming.

Download or read book The Biology of Animal Stress written by Gary P. Moberg and published by CABI. This book was released on 2000 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subjects of stress and animal welfare are currently attracting immense interest. This book brings together a range of perspectives from biomedical research (including human health and animal models of human stress) on stress and welfare, and assesses new approaches to conceptualising and alleviating stress.

Download or read book Hair and Scalp Treatments written by Antonella Tosti and published by Springer Nature. This book was released on 2019-09-12 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conditions of the hair and scalp often cause significant psychological distress and sometimes physical discomfort for patients. Similarly, finding the right treatment can prove challenging for the physician. Hair and Scalp Treatments -- A Practical Guide, focuses on therapy with each chapter briefly describing the disease to the reader and then teaching the step-by-step therapeutic algorithm. Procedures commonly used in the treatment of alopecias are also reviewed and detailed in specific chapters. This book also discusses everyday questions that patients commonly ask doctors and provides practical tips such as how to recommend the best shampoo, conditioner or hair dye for your patient, or how to prescribe the right nutritional supplements. There are additional sections on future treatments on the horizon and how regenerative medicine can be used. Hair and Scalp Treatments -- A Practical Guide, is the only book of its kind focused on treatment and addresses topics that are not covered by current titles on hair disorders. Written and edited by leading experts in the field, this practical guide can be used not only by dermatologists but by general practice and family physicians as well.

Download or read book Hair Analysis of Seven Bodybuilders for Anabolic Steroids Ephedrine and Clenbuterol written by V. Dumestre-Toulet and published by . This book was released on 2002 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several bodybuilders, all winners of international competitions, were arrested for trafficking of a number of doping agents including anabolic steroids, ephedrine, beta-adrenergics, human chorionic gonadotropin, antidepressants, and diuretics.

Download or read book Methods in Social Neuroscience written by Eddie Harmon-Jones and published by Guilford Press. This book was released on 2012-05-09 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Straightforward and practical, this is the first book to provide detailed guidance for using neurobiological methods in the study of human social behavior, personality, and affect. Each chapter clearly introduces the method at hand, provides examples of the method's applications, discusses its strengths and limitations, and reviews concrete experimental design considerations. Written by acknowledged experts, chapters cover neuroimaging techniques, genetic measurement, hormonal methods, lesion studies, startle eyeblink responses, facial electromyography, autonomic nervous system responses, and modeling based on neural networks.

Download or read book Practical Aspects of Hair Transplantation in Asians written by Damkerng Pathomvanich and published by Springer. This book was released on 2018-05-08 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively discusses the practical aspects of hair transplantation in Asians. The demand for hair transplantation has increased globally in recent years and Follicular Unit Extraction (FUE) is gaining popularity. As such the book examines the techniques used by different ethnic group in Asia, included shaving, non-shaving FUE and robotic hair restoration surgery. With the help of illustrations, it describes surgical techniques and provides numerous practical tips. Written by leading experts and offering an overview of the current state of the art of hair restoration surgery, it enables experienced surgeons in the field to achieve optimal outcomes and to improve patients' QOL. It is a must read for hair surgeons performing hair transplantation on members of the Asian population.

Download or read book Hair and Scalp Disorders written by Zekayi Kutlubay and published by BoD – Books on Demand. This book was released on 2017-05-03 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook contains the latest advances and scientific knowledge from the leading experts in hair biology, hair disorders, and clinical trichology. The book consists of ten sections in which hair biology, hair genetics, hair diagnostics, hair loss types, pathogenesis, treatment options, and restoration techniques are discussed. This book also emphasizes on various genetic and nongenetic alopecia types, differential diagnosis, and the measurement of hair loss. One chapter of the book is devoted to natural products for hair care and treatment. We believe that this textbook will serve as a comprehensive guide to many physicians dealing with hair disorders in their clinical practice.

Download or read book Textbook of Clinical Pediatrics written by H. A. Harfi and published by Springer Science & Business Media. This book was released on 2012-01-10 with total page 4213 pages. Available in PDF, EPUB and Kindle. Book excerpt: The new edition of this classic reference offers a problem-based approach to pediatric diseases. It encompasses almost all pediatric subspecialties and covers every pediatric disease and organ system. It includes case studies and over 750 lavish illustrations.