Biological samples

Xem 1-20 trên 63 kết quả Biological samples
  • Biological Risk Engineering — Infection Control and Decontamination provides a compendium of biological risk management information. Biological risk is of concern to us all. The biological risks we face vary and include biological contamination within our environment and, more personally, biological risk to ourselves through disease or the potential for disease. This book deals with a subset of biological risk agents defined as bacteria, molds, yeasts, viruses, and prions. The term biologicals refers to these agents.

    pdf499p crazy_sms 10-05-2012 74 26   Download

  • From microorganisms to whales, from single cells to complex organisms, from plants to animals to fungi, from body plans to behavior, the diversity of life is amazing. Living organisms have a profound impact on our physical world of ocean, landscape, and climate; around us is a multitude of diverse ecosystems that provide a livable environment and many valuable resources. The study of life—biology—is a multifaceted endeavor that uses observation, exploration, and experiments to gather information and test hypotheses about topics ranging from climate change to stem cells.

    pdf209p mnemosyne75 02-02-2013 21 4   Download

  • A simple and sensitive spectrophotometric method has been developed for the determination of arsenic using variamine blue as a chromogenic reagent. The method is based on the reaction of arsenic(III) with potassium iodate in acid medium to liberate iodine, which oxidizes variamine blue to form a violet coloured species having an absorption maximum at 556 nm.

    pdf5p trungdungmta 18-08-2015 13 2   Download

  • The past decade has seen the field of proteomics expand from a highly technical endeavor to a widely utilized technique. The objective of this book is to highlight the ways in which proteomics is currently being employed to address issues in the biological sciences. Although there have been significant advances in techniques involving the utilization of proteomics in biology, fundamental approaches involving basic sample visualization and protein identification still represent the principle techniques used by the vast majority of researchers to solve problems in biology.

    pdf276p ktct_1669 09-05-2012 186 51   Download

  • Nowadays, Chromatography is the most versatile and widespread technique employed in modern chemical analysis and plays a vital role in the advancement of chemistry, biology, medicine and related fields of research. Because of the inherent simplicity and ease of operation, it can be used together with a wide range of detection systems, including electrochemical, photometric and mass spectrometry, being an invaluable laboratory tool for the separation and identification of compounds.

    pdf438p camchuong_1 04-12-2012 23 8   Download

  • For the analysis of biological samples two blood samples were taken, one with 5 ml heparin for the determination of acetyl cholinesterase (AChE) and pseudo cholinesterase (PChE) by the technique of Michel and Aldrige (Vorhaus and Kark, 1953) and another of 5 ml without anticoagulant for the analysis of OC pesticides in serum.

    pdf442p conquynho32 18-09-2012 34 7   Download

  • In the past few years we have observed an interesting mutual interest of two fields of research and development in each other. Life sciences area researchers discovered the opportunities offered my micro- and nanotechnology, while people from the microfluidics and BIOMEMS area discovered the application potential of these technologies in cell biology. Unfortunately, these two research communities share little in common: they read and publish in different scientific journals, have incompatible jargons, attend separate conferences, and have a different scientific approach and culture.

    pdf373p thix1minh 16-10-2012 20 6   Download

  • Reliable detection and identification of pathogens in complex biological samples, in the presence of contaminating DNA from a variety of sources, is an important and challenging diagnostic problem for the development of field tests. The problem is compounded by the difficulty of finding a single, unique genomic sequence that is present simultaneously in all genomes of a species of closely related pathogens and absent in the genomes of the host or the organisms that contribute to the sample background. ...

    pdf11p dell39 27-03-2013 7 1   Download

  • The current volume entitled Protein Purification is designed to facilitate rapid access to valuable information about various methodologies. It aims as well to provide an overview of state-of-art techniques for the purification, analysis and quantification of proteins in complex samples using different enrichment strategies.Protein purification is a series of processes intended to isolate a single type of protein from a complex mixture. Protein purification is vital for the characterization of the function, structure and interactions of the protein of interest....

    pdf232p ktct_1669 09-05-2012 129 27   Download

  • With respect to the sampling of tomato it occurred at the beginning, on the highest peak and at the end of the production stage of tomato. For each sampling unit a zigzag path by the crop was followed, harvesting a tomato every three places along the zig-zag, and then based on a quartering system, obtaining a sample of 1 kg per plot.

    pdf254p conquynho32 18-09-2012 86 27   Download

  • A study to measure indoor concentrations and emission rates of volatile organic compounds (VOCs), including formaldehyde, was conducted in a new, unoccupied manufactured house installed at the National Institute of Standards and Technology (NIST) campus. The house was instrumented to continuously monitor indoor temperature and relative humidity, heating and air conditioning system operation, and outdoor weather. It also was equipped with an automated tracer gas injection and detection system to estimate air change rates every 2 h.

    pdf228p ut_hai_can 29-12-2012 42 17   Download

  • Highly experienced physicians and biologists clearly explain the basic technical knowledge needed to use AFM and demonstrate its multifarious uses in biomedicine and the life sciences. The applications range widely from morphostructural analyses of cellular structures, to the investigation of subcellular structures, to functional investigations, and reveal a powerful new way of looking at biological samples.

    pdf375p chipmoon 19-07-2012 68 16   Download

  • Stereopsis is a vision process whose geometrical foundation has been known for a long time, ever since the experiments by Wheatstone, in the 19th century. Nevertheless, its inner workings in biological organisms, as well as its emulation by computer systems, have proven elusive, and stereo vision remains a very active and challenging area of research nowadays. In this volume we have attempted to present a limited but relevant sample of the work being carried out in stereo vision by researchers from around the world.

    pdf128p lulanphuong 17-03-2012 43 15   Download

  • The environmental challenges we face today include all of the same ones that we faced more than 30 years ago at the first Earth Day celebration in 1970. In spite of the unflagging efforts of environmental professionals (and others), environmental problems remain. Many large metropolitan areas continue to be plagued by smog, beaches are periodically polluted by oil spills, and many running waters (rivers and streams) still suffer the effects of poorly treated sewage and industrial discharges....

    pdf270p 951628473 07-05-2012 40 10   Download

  • This study used biomarkers of internal dose, exposure and effect, which allowed setting the pesticides levels in 132 biological samples. OC pesticides which were most frequently found in biological samples were 4,4-DDE and endosulfan. It is important to point out that laborers did not report the use of these pesticides in the tomato crop, so the presence of these is explained by the environmental pollution and toxicokinetics inherent to this group of pesticides.

    pdf402p conquynho32 18-09-2012 46 8   Download

  • Air samples for formaldehyde and acetaldehyde were collected on treated silica-gel cartridges (P/N WAT047205, Waters Corp.) using separate pumps. Sampling flow rates were 2.0 L min-1 collected over 15 min to 30 min yielding sample volumes of about 30 L to 60 L. Each cartridge was extracted with 2 mL of acetonitrile. Extracts were analyzed by high- performance liquid chromatography with a diode array detector at a wavelength of 365 nm following ASTM D 5197 (ASTM, 1997a). Extract concentrations were determined from multi- point calibrations of external standard mixtures. ...

    pdf444p ut_hai_can 29-12-2012 27 8   Download

  • Consistent with the results of the Bechara study, our subjects gradually concentrated their choices on deck B (Fig. 2). The beginning phase of the task was an exploratory period in which both populations sampled each deck equally. For the next 20 draws subjects shifted towards deck B drawing on average 8 of the 20 cards from deck A. In the final 10 draws both groups largely abandoned deck A: on average the younger subjects chose deck A two times of 10 and the older subjects chose deck A three times of 10. In summary both populations appear to have adapted the same way to the payoffs....

    pdf0p thankinhphanliet 01-01-2013 30 6   Download

  • The inclusion of Business Angels in the range of ‘informal’ (as opposed to ‘institutional’) investors provides us an indication that there are potential difficulties in measuring the size of the Business Angel community. Mason and Harrison identify two main problems, identification and definition. Regarding the former, in his seminal work on Business Angels, William Wetzel (1983) notes that the total population of Business Angels is unknown and probably unknowable on account of their invisibility, desire for anonymity, and the undocumented nature of their investing.

    pdf15p hongphuocidol 04-04-2013 28 6   Download

  • The International Biological Programme (IPB), a world-wide plan of coordinated research on the biological basis of productivity and human welfare, covered terrestrial and aquatic environments, and ran for almost a decade from 1964. Recognising the need for guidance in methodology, the IBP arranged for the publication of a series of handbooks on techniques with the aim of achieving comparability of results all over theworld. One of these handbooks dealt with the study of marine benthos.

    pdf442p japet75 30-01-2013 23 5   Download

  • As our goal is to observe managers’ abilities to generate profits through active management, we employ only properties that were both bought and sold within the sample period, and thus for which we have round trip transaction returns. In future versions of the paper, we will relax this condition where possible to account for properties purchased within the sample period and not yet sold, as well as properties purchased prior to the start of the sample and sold with the sample period.

    pdf228p quaivattim 01-12-2012 23 4   Download

Đồng bộ tài khoản