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PubMed2005

Progress in protein and antibody microarray technology.

The success of genome sequencing projects has led to a shift from the description of single molecules to the characterisation of complex samples. At the same time, there is growing interest not only in studying organisms at the genomic level, but in the characterization of their proteome. Such a task would not be possible without the availability of appropriate technologies. Protein and antibody microarray technologies are, in addition to two-dimensional gel electrophoresis followed by mass spectrometry, two of the most propitious technologies for the screening of complex protein samples. Nevertheless, to succeed, protein and antibody microarrays have to overcome their current limitations. This review aims to introduce these new technologies and highlights their current prospects and limitations.

Antibodies↗
PubMedDate not supplied

Reasoning about diabetes and its relationship to the use of telecommunication technology by patients and physicians.

UNLABELLED: Health care is moving toward a team effort, with patients as partners. This requires effective communication between physicians and patients, who have different understandings of health and illness. These understandings in turn guide their decisions about management of health and illness. With the introduction of home-based technology, which provides an efficient way for doctors and patients to communicate, the question of the effectiveness of the decisions being made must be addressed. In this study, we assess the conceptualizations of health and illness related to diabetes and the relationship to the use of communication technology by patients and physicians. METHODS: The subjects were interviewed using a semi-structured questionnaire and were then asked to enter information into a telephone-based telecommunications system. Data were audiotaped, transcribed, and analyzed to characterize models of health and illness and for the factors that influence the decision making about diabetes management. Interactions with the system were then examined relative to these findings. RESULTS: Patients used lay concepts in providing explanations of their illness, whereas physicians used biomedical concepts. Use of these differing concepts influenced the use of telecommunication technology, with more errors in the communication of information being made by patients than by physicians. Examination of the organization of information required by the system showed it to be incongruent with the way patients normally reason, but in agreement with the way physicians reason. The paper discusses the implications of these findings for: (a) the nature of evidence used by patients and physicians; and (b) the design of technology to maximize effective doctor patient communication.

Attitude to Computers↗
PubMed1987

The rise of technology in Chinese hospitals.

Chinese hospitals in the 1980s are in the midst of a technological revolution. Based upon data from several regions in China, this paper describes the political, organizational, economic, and philosophical changes which have accompanied the shift in focus from primary care medicine to high technology tertiary care. The increased authority of physicians, greater contact with the West, and increased funding for medical equipment are key factors in these changes. Although the Chinese state continues to control the administration and financing of most hospitals, the decentralizing reforms of Deng Xiaoping have undermined its ability to effectively plan for, and assess new technology. At present, limited resources prevent most regions from excessive technology acquisition, but the state must rebuild its planning capacity in order to foster rational allocation of scarce medical resources.

Capital Expenditures↗
PubMed1994

Assessing genetic technologies. Two ethical issues.

Assessment of the impact of genetic technologies requires an understanding of the ethical issues that such technologies raise, which in turn requires an understanding of the social context of genetics. This article discusses 10 factors that characterize the social context of contemporary genetics, and considers two presumptions that usually are unquestioned--first, that more choice is always better; second, that what can be improved should be improved. Recent experience with genetic screening and testing to increase reproductive choice indicates that it is sometimes an ambiguous good. Prenatal testing, which has been guided by an ideology of nondirective counseling, will become increasingly problematic as the menu of possible genetic tests grows longer, because nondirectiveness offers no way to distinguish between significant disease and parental whim. In the realm of reproduction, more choice may also come to mean increasing parental responsibility to have genetically "healthy" offspring. Technologies intended to improve health outcomes may also be used for non-health-related goals--such as to increase athletic performance or to capitalize on social prejudices. Genetic technologies increasingly will challenge the troubled distinction between therapy and enhancement.

Biotechnology↗
PubMed2003

Field evaluation of the solvent extraction residual biotreatment technology.

The Solvent Extraction Residual Biotreatment (SERB) technology was evaluated at a former dry cleaner site in Jacksonville, FL, where an area of tetrachloroethylene (PCE) contamination was identified. The SERB technology is a treatmenttrain approach for complete site restoration, which combines an active in situ dense nonaqueous-phase liquid (DNAPL) removal technology, cosolvent extraction, with a passive enhanced in situ bioremediation technology, reductive dechlorination. During the in situ cosolvent extraction test, approximately 34 kL of 95% ethanol/5% water (v:v) was flushed through the contaminated zone, which removed approximately 60% of the estimated PCE mass. Approximately 2.72 kL of ethanol was left in the subsurface, which provided electron donorfor enhancement of biological processes in the source zone and downgradient areas. Quarterly groundwater monitoring for over 3 yr showed decreasing concentrations of PCE in the source zone from initial values of 4-350 microM to less than 150 microM during the last sampling event. Initially there was little to no daughter product formation in the source zone, but after 3 yr, measured concentrations were 242 microM for cis-dichloroethylene (cis-DCE), 13 microM for vinyl chloride, and 0.43 microM for ethene. In conjunction with the production of dissolved methane and hydrogen and the removal of sulfate, these measurements indicate that in situ biotransformations were enhanced in areas exposed to the residual ethanol. First-order rate constants calculated from concentration data for individual wells ranged from -0.63 to -2.14 yr(-1) for PCE removal and from 0.88 to 2.39 yr(-1) for cis-DCE formation. First-order rate constants based on the change in total mass estimated from contour plots of the groundwater concentration data were 0.75 yr(-1) for cis-DCE, -0.50 yr(-1) for PCE, and -0.33 yr(-1) for ethanol. Although these attenuation rate constants include additional processes, such as sorption, dispersion, and advection, they provide an indication of the overall system dynamics. Evaluation of the groundwater data from the former dry cleaner site showed that cosolvent flushing systems can be designed and utilized to aid in the enhancement of biodegradation processes at DNAPL sites.

Adsorption↗
PubMed2004

Framework for evaluating the "greenness" of chemical processes: case studies for a novel VOC recovery technology.

A system of metrics is proposed for a rough-guide evaluation of the greenness of new and existing chemical technologies as well as for the analysis of flow sheets of new processes. The proposed methodology is based on a hierarchical approach. The main feature of the proposed system is the reflection of the stakeholder relevance of various aspects of green chemistry at different levels of the hierarchy and the corresponding system boundaries. Therefore, the developed methodology provides a basis for the multiobjective comparison of alternative technologies in terms of their greenness. A novel technology for recovery of volatile organic chemicals (VOCs) using monolithic adsorbents has been evaluated in terms of its environmental efficiency using a small set of indicators assembled into a hierarchical metric. A comparison between incineration and recovery of VOCs via adsorption has been performed using the proposed methodology. The comparison highlights considerable environmental advantages of the recovery technology. Flow sheet analysis points out which stages of the adsorption process could be further improved. Indicators have been evaluated within defined system boundaries.

Adsorption↗
PubMed2006

Investigation of novel incineration technology for hospital waste.

Conventional incineration systems for hospital waste (HW) emit large amounts of particulate matter (PM) and heavy metals, as well as dioxins, due to the large excess air ratio. Additionally, the final process residues--bottom and fly ashes containing high levels of heavy metals and dioxins--also constitute a serious environmental problem. These issues faced by HW incineration processes are very similar to those confronted by conventional municipal solid waste (MSW) incinerators. In our previous work, we developed a novel technology integrating drying, pyrolysis, gasification, combustion, and ash vitrification (DPGCV) in one step, which successfully solved these issues in MSW incineration. In this study, many experiments are carried out to investigate the feasibility of employing the DPGCV technology to solve the issues faced by HW incineration processes, although there was no MSW incinerator used as a HW incinerator till now. Experiments were conducted in an industrial HW incineration plant with a capacity of 24 tons per day (TPD), located in Zhenzhou, Henan Province. Results illustrated that this DPGCV technology successfully solved these issues as confronted by the conventional HW incinerators and achieved the expected results for HW incineration as it did for MSW incineration. The outstanding performance of this DPGCV technology is due to the fact that the primary chamber acted as both gasifier for organic matter and vitrifying reactor for ashes, and the secondary chamber acted as a gas combustor.

Dioxins↗
PubMed1998

Prescriptions: autonomy, humanism and the purpose of health technology.

My purpose is to examine two of the foundations of medical ethics: the principle of autonomy and the concept of the human. I also investigate the extent to which health technology makes autonomy and humanness possible. I begin by underlining Illich's point that the same health technology designed to promote health and autonomy also is pathogenic. I proceed to analyse the Kantian concept of autonomy, a concept which is closely associated with health and which continues to determine current ethical thinking. In so doing, I uncover an unexpected ontological function of health technology, a function described in Heidegger's work on technology. Based on this discovery, I suggest that calls for Kantian autonomy may often be self-defeating or even sometimes harmful. I conclude by calling for continued ethical vigilance, but also for a questioning of the hitherto virtually unquestionable concepts of ethics and humanness which may themselves play a role in our era's greatest problems.

Ethics, Medical↗
PubMed2001

On the value-ladenness of technology in medicine.

The objective of this article is to analyse the value-ladenness of technology in the context of medicine. To address this issue several characteristics of technology are investigated: i). its interventive capacity, ii). its expansiveness and iii). its influence on the concept of disease, iv). its generalising character, v). its independence of the subjective experience of the patient. By this analysis I hope to unveil the double face of technology: Technology has a Janus-face in modern medicine, and the opposite of its factual face is evaluative.

Ethics↗
PubMed2001

Genetic manipulations in aquaculture: a review of stock improvement by classical and modern technologies.

The aim of this review was to highlight the extent to which the genetic technologies are implemented by the aquaculture industry. The review shows that some of the modern genetic technologies are already extensively applied by the diverse aquaculture industries, though not to the same extent for all important aquacultured species (according to FAO 1998 figures). Some species (common carp, Atlantic salmon, rainbow trout, channel catfish, Nile tilapia, and the Pacific oyster) received concentrated breeding efforts, while other major cultured species (Chinese and Indian carps and the giant tiger shrimp) received, so far, relatively limited attention, and a few species (Yesso scallop, blue mussel, white Amur bream, and milkfish) have, apparently, not been genetically improved at all. Most of the genetically improved strains reaching the aquaculture industry were developed through traditional selective breeding (selection, crossbreeding, and hybridization). Emerging, more modern technologies for genetic manipulation seem to take 10-20 years from being established experimentally until applications affect the industry. Thus, chromosome-set and sex manipulations started to affect the industry during the 1980's and 1990's. DNA marker technology and gene manipulations have yet hardly affected the industry. The former have not matured yet, but hold much promise. The latter could have affected the industry already had it not been restricted by public concern.

Animals↗
PubMed1998

Face-to-face confrontation: effects of closed-circuit technology on children's eyewitness testimony and jurors' decisions.

The present study was designed to examine effects of closed-circuit technology on children's testimony and jurors' perceptions of child witnesses. For the study, a series of elaborately staged mock trials was held. First, 5- to 6-year-old and 8- to 9-year-old children individually participated in a play session with an unfamiliar male confederate. Approximately 2 weeks later, children individually testified about the event at downtown city courtroom. Mock juries composed of community recruits viewed the trials, with the child's testimony presented either live in open court or over closed-circuit television. Mock jurors made ratings concerning the child witness and the defendant, and deliberated to reach a verdict. Results indicated that overall, older children were more accurate witnesses than younger children. However, older, not younger children produced more inaccurate information in free recall. Compared to live testimony in open court, use of closed-circuit technology led to decreased suggestibility for younger children. Testifying in open court was also associated with children experiencing greater pretrial anxiety. Closed-circuit technology did not diminish fact finders' abilities to discriminate accurate from inaccurate child testimony, nor did it directly bias jurors against the defendant. However, closed-circuit testimony biased jurors against child witnesses. Moreover, jurors tended to base their impressions of witness credibility on perceived confidence and consistency. Implications for the use of closed-circuit technology when children testify are discussed.

Adult↗
PubMed2004

Biosecurity issues associated with current and emerging embryo technologies.

A variety of procedures associated with in vivo and in vitro embryo production, as well as cloning and transgenics, are in current use by both researchers and practitioners. Biohazards associated with these procedures could influence clinical proficiency and the outcome of basic research or result in unusual distribution of pathogens in populations of animals. By their nature, embryo technologies are vulnerable to contamination from numerous sources. Although pathogens can originate in the physical environments in which embryo technologies are applied, they are more likely to be introduced via animals or materials of animal origin. However, it is important to note that both the occurrence and consequences of contamination are heavily influenced by environmental circumstances. This paper represents a philosophical description of biohazards associated with three generations of embryo technologies using the cow as a model species. Emphasis is placed on sources of contamination, current or suggested preventive actions and the issue of environmental changes as they relate to the emergence of biohazards and the implementation of biosecurity measures. Some specific pathogens are discussed for illustration. In addition, details of the risks associated with introducing bovine viral diarrhoea virus in each of three generations of embryo technologies are described.

Animals↗
PubMed2004

New technologies in screening for breast cancer: a systematic review of their accuracy.

We systematically reviewed the literature on the accuracy of new technologies proposed for breast cancer screening. Four potential tests were identified (ultrasound, magnetic resonance imaging (MRI), full-field digital mammography (FFDM), and computer-aided detection (CAD)) for which primary studies met quality and applicability criteria and provided adequate data on test accuracy. These technologies have been assessed in cross-sectional studies of test accuracy where the new test is compared to mammography. Ultrasound, used as an adjunct to mammography in women with radiologically dense breasts, detects additional cancers and causes additional false positives. Magnetic resonance imaging may have a better sensitivity (but lower specificity) than mammography in selected high-risk women, but studies of this technology included small number of cancers. Computer-aided detection may enhance the sensitivity of mammography and warrants further evaluation in large prospective trials. One study of FFDM suggests that it may identify some cancers not identified on conventional mammography and may result in a lower recall rate. The evidence is currently insufficient to support the use of any of these new technologies in population screening, but would support further evaluation.

Breast Neoplasms↗
PubMed2003

The outcomes of assisted reproductive technology cycles in patients with one or two ovaries.

AIM: To provide a comparison between the follicular response to ovulation induction, and the pregnancy rate of women with a single or two ovaries, undergoing assisted reproductive technology. METHODS: To evaluate the outcome of assisted reproductive technology, 46 treatment cycles in women with one ovary were compared to 123 cycles in women with two ovaries. RESULTS: The mean age of the patients in the two groups were not similar (34.4 +/- 3.8 and 33.1 +/- 4.0, respectively). The one ovary-group had significantly higher mean baseline Follicle Stimulating Hormone levels and required more ampoules for induction. Although the induction period was longer in the one-ovary group, the outcome of the assisted reproductive technology in both groups was similar. The maximum E2 levels on the day of Human Chorionic Gonadotropin administration were significantly lower in the one-ovary group, although endometrial thickness appeared to be the same in both groups. The patients with two ovaries had a significantly higher mean number of mature or immature oocytes aspirated, as well as embryos transferred. Although there was no statistical difference between the two groups following assisted reproductive technology, the pregnancy rate in the two-ovary group was more than double that of the one-ovary group. CONCLUSION: The potential for success after in vitro fertilization is not impaired in women with one ovary.

Adult↗
PubMed2003

Ethical issues arising from a research, technology and development project to support frail older people and their family carers at home.

The present paper provides an overview of the application of the key ethical issues which arose in an EU-funded research, technology and development project, Assisting Carers using Telematics Interventions to meet Older Persons' Needs (ACTION). The primary aim of the ACTION project was to support frail older people and their family carers in their own homes across England, Northern Ireland, the Republic of Ireland, Sweden and Portugal via the use of user-friendly information and communication technology. Ethical guidelines were developed in the project and used as a tool to enable the multidisciplinary project team to increase their awareness of ethical issues in their everyday work, and to act as a useful ethical framework for regular team discussions at international and local meetings across the partner countries. A range of ethical issues arose during the field-study phases of the project when the ACTION services were introduced into a number of families' own homes. It can be argued that these ethical issues reflect factors relating both to the application of research into practice, as well as those relating more directly to the use of new technology by families and care professionals. Key issues centre upon the ethical concepts of autonomy, independence, quality of life, beneficence, non-maleficence and justice, and more specifically, on ethical issues of security, privacy and confidentiality, increased expectations, and withdrawal of the service. This paper is intended to facilitate dialogue and debate in the area of enabling (assistive) technology in home care for older people and their families.

Activities of Daily Living↗
PubMed2002

Genetic diversity and technological properties of Streptococcus thermophilus strains isolated from dairy products.

AIMS: To evaluate the genetic diversity and the technological properties of 44 strains of Streptococcus thermophilus isolated from dairy products. Methods METHODS AND RESULTS: Strains were analysed for some relevant technological properties, i.e. exopolysaccharide (EPS) production, growth kinetic in skim milk medium, urease activity and galactose fermentation. The EPS production, determined by evaluating the colour of the colonies grown in ruthenium red milk agar, was observed in 50% of the analysed strains. Urease activity, determined by colorimetric and conductimetric methods, showed that 91% of the isolates, all except four, could hydrolyse urea. A conductimetric approach was also used for the evaluation of the overall metabolic behaviour in milk of Strep. thermophilus strains and the differences observed allowed grouping of the strains in seven different clusters. A total of 11 strains were able to produce acid in presence of galactose. Genetic diversity of Streptococcus thermophilus strains, evaluated by Random Amplified Polymorphic DNA fingerprinting (RAPD) and amplified epsC-D restriction analysis, allowed the identification of 21 different genotypes. CONCLUSIONS: Comparison between the genotypic and phenotypic data highlights an interesting correlation between some important technological properties and well-defined genotypes. SIGNIFICANCE AND IMPACT OF THE STUDY: The genetic and technological characterization carried out on several Strep. thermophilus strains of dairy origin should expand the knowledge on this important lactic acid bacteria species and lead to a simple, rapid, and reliable identification of strains on the basis of well-defined biotechnological properties.

Animals↗
PubMed2000

The impact of information technology on the performance of clinical pharmacy services.

Electronic patient records are now being developed to assist in the clinical management of patients within secondary care. This paper reviews how various types of information technology used in these electronic patient records can improve the performance of clinical pharmacy services. The different levels of information technology support for some of the main aspects of clinical pharmacy services are described. How the impact and outcome of information technology support for these services should be evaluated are discussed. The human and technological factors that must be considered to ensure that the implementation succeeds and the potential benefits are realized are examined.

Cost-Benefit Analysis↗
PubMed2000

Functional characterization of CD8(+) antigen-specific cytotoxic T lymphocytes after enrichment based on cytokine secretion: comparison with the MHC-tetramer technology.

Cell therapy with antigen-specific T cells holds promise for various diseases including cancer and viral infections. The powerful enrichment procedure based on major histocompatibility complex (MHC)-tetramers, however, is of limited applicability so far. Therefore, the recently developed cell surface affinity matrix technology that allows direct identification and enrichment of life antigen-specific T cells based on cytokine secretion was evaluated in this respect. To this end, CD8(+) T cells directed against the HLA-A(*)0201-restricted melanoma-associated peptide Melan-A (aa26-35) were generated by combining stimulation of peptide-pulsed autologous dendritic cells (DC) with antigen-independent expansion with anti-CD3/anti-CD28 monoclonal antibodies (MoAb). Antigen-specific cytotoxic T lymphocyte (CTL) were detected based on stimulation-induced interferon (IFN)-gamma and interleukin (IL)-4 secretion and enriched > 100-fold using the cell surface affinity matrix technology. The resulting IFN-gamma- and IL-4-secreting CTL lines contained > 80% and > 70% cytokine positive T cells, respectively. They exhibited a cytotoxic activity against Melan-A expressing target cells that was significantly higher as compared to nonpurified CTL. Direct staining of enriched CTL with HLA-A2-Melan-A-tetramers revealed a high correlation between the results obtained from the cell surface affinity matrix technology and those obtained from tetrameric complexes. Altogether, our study demonstrates that cytokine-driven enrichment based on the cell surface affinity matrix technology enables selective isolation of functionally active antigen-specific CTL that may be used for an adoptive T cell transfer in immunotherapy.

Antigens, Neoplasm↗