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At least 865 records · Page 48Linked to original sources
PubMed2006

Parasites of winter flounder (Pleuronectes americanus) as an additional bioindicator of stress-related exposure to untreated pulp and paper mill effluent: a 5-year field study.

A study was conducted in a marine inlet to assess the effects of untreated discharges from a pulp and paper mill, a municipality, and industries in western Newfoundland on winter flounder (Pleuronectes americanus), a fish species shown previously to be sensitive to environmental contaminants in sediment. The fish were captured by SCUBA divers about 2 km down-current from the mill discharging effluent containing resin acids, and at three reference sites 2 to 11 km away near the opposite shore, each spring in five consecutive years and the fish were necropsied on site. A total of 360 and 339 flounder were examined near the mill and references sites, respectively. Several bioindicators were used to assess fish health including parasites. More fish exhibiting external and microscopic lesions in several tissues, lower condition factors, elevated hepatosomatic index, and delayed reproductive development were observed in samples taken near the paper mill than at the reference sites. A higher prevalence of an ectoparasite, Cryptocotyle lingua, but a significantly lower mean abundance of three metazoans infecting the digestive tract was noted in fish near the mill than in the reference samples. These results, comprising abnormal fish size distribution, low body condition factor, external and internal lesions, enlarged liver, delayed gonadal development, and changes in parasitism, were stress-related, indicative of impaired health, and associated primarily with untreated discharges from the pulp and paper mill. This integrated and multidisciplinary study also provides further evidence on the use of fish parasites as a valid and an additional bioindicator in programs monitoring environmental contaminants.

Analysis of Variance↗
PubMed2006

Duplicate publication and 'paper inflation' in the Fractals literature.

The similarity of documents in a large database of published Fractals articles was examined for redundancy. Three different text matching techniques were used on published Abstracts to identify redundancy candidates, and predictions were verified by reading full text versions of the redundancy candidate articles. A small fraction of the total articles in the database was judged to be redundant. This was viewed as a lower limit, because it excluded cases where the concepts remained the same, but the text was altered substantially. Far more pervasive than redundant publications were publications that did not violate the letter of redundancy but rather violated the spirit of redundancy. There appeared to be widespread publication maximization strategies. Studies that resulted in one comprehensive paper decades ago now result in multiple papers that focus on one major problem, but are differentiated by parameter ranges, or other stratifying variables. This 'paper inflation' is due in large part to the increasing use of metrics (publications, patents, citations, etc) to evaluate research performance, and the researchers' motivation to maximize the metrics.

Algorithms↗
PubMed1990

A filter paper dye-binding assay for quantitative determination of protein without interference from reducing agents or detergents.

A method is described for quantitation of protein in the presence of reducing agents, detergents, and other substances which often interfere with assays of protein in solution. The proteins are applied to Whatman No. 1 filter paper, air-dried, washed with methanol, and then stained with Coomassie brilliant blue G. Following destaining, the paper is air-dried and the protein-bound dye is extracted. Sample absorbance measurements are made in a 96-well plate using an automated microplate reader (600-405 nm) or in a cuvette at 610 nm. This filter paper assay is useful for determining 100 ng to 20 micrograms of protein in the presence of ammonium sulfate, urea, thiol-reducing agents, amino acids, DNA, ionic and nonionic detergents, and acid or base.

Animals↗
PubMed1989

A-to-D conversion from paper records with a desktop scanner and a microcomputer.

A novel method for digitizing signals contained in paper records is presented. This method is based on the use of an inexpensive optical scanner to translate the image on paper into a binary, bit map data structure. Several algorithms which recognize the signal line in the bit map and translate it into a series of numbers which are equivalent to the output of electronic analog-to-digital converters are described. The method was validated by comparison both with idealized test patterns of varying frequency content and with electronically digitized pressure and pressure time derivative tracings from chronically instrumented dogs. The root mean square error for the physiological signals was 3.5-3.9% of peak-to-peak full scale, corresponding to roughly 50% more than the thickness of the signal line on the paper.

Algorithms↗
PubMed1987

[3H]3,4-methylenedioxymethamphetamine (MDMA) interactions with brain membranes and glass fiber filter paper.

The binding of [3H]3,4-methylenedioxymethamphetamine [( 3H]MDMA) to both rat brain membrane preparations and glass fiber filter papers was analyzed in the present study. Saturation studies indicate that [3H]MDMA binding is saturable and monophasic in both the presence and absence of rat brain membranes. This apparent 'specific' binding of [3H]MDMA in both the presence and absence of brain homogenates was totally eliminated by pretreating glass fiber filter papers with polyethylenimine. Drug competition studies demonstrated that [3H]MDMA binding displays a distinct 'pharmacological' profile in the absence of brain tissue. These data indicate that apparent [3H]MDMA binding to rat brain homogenates results from artifactual of [3H]MDMA to glass fiber filter paper. In addition, uptake of [3H]MDMA into rat brain synaptosomes could not be detected. We conclude the [3H]MDMA has limited usefulness in radioligand binding studies.

3,4-Methylenedioxyamphetamine↗
PubMed1978

Use of logit paper in determination of superoxide dismutase activity in human blood cells.

Superoxide dismutase activity of the human blood cells was determined by the capacity to inhibit nitrite formation from hydroxylammonium chloride. Relationship between percentage of nitrite formation and amount of purified human erythrocyte superoxide dismutase was plotted on conventional graph paper, double log and logit papers. A comparison of the results showed that a linear relationship was obtained only with the logit paper, and thus a more accurate and simple estimation of the activity can be made on a single determination of the specimens.

Ammonium Chloride↗
PubMed1988

A protein-free blocking system for the covalently binding matrix cyanuric chloride-activated paper in immunological procedures.

A new protein-free blocking system containing 10% (w/v) sulfanilic acid/10% (v/v) triethanolamine/0.05% (v/v) Tween 20 has been used to block free binding sites of the covalently binding matrix cyanuric chloride-activated paper (CCA-paper). This method allows a reversible staining of protein blots with Coomassie brilliant blue after each step of the immunological procedure and reuse of the blots for a repeated antibody probing. Non-radioactive and radioactive detection procedures have been compared with blots on CCA-paper and nitrocellulose. The best combination is a Coomassie brilliant blue staining and immunological detection with 125I-protein A.

Cross-Linking Reagents↗
PubMed1988

Testing for AIDS on samples of dried blood prepared on filter papers.

A substantial rise in the number of AIDS cases has been observed during the past year in many African countries, and HIV-2 indigenous transmission and increased disease have since gained importance in Senegal. Both for HIV-1 and HIV-2 diagnosis, ELISA positivity is followed by a Western blot test for specific antibodies. The serum samples are stored at sub-zero temperatures both during shipment and storage while awaiting serological testing. Attempts have been made to use dried blood on filter papers for AIDS diagnosis, in 35 samples from Africa and 10 from USA, along with corresponding serum samples. The concordance has been good with an almost invariable ELISA confirmation on Western blot, no selective loss in any of the bands in Western blot and the Pearson coefficient value for ELISA testing on serum and dried blood lots of 0.85. Based on the data obtained during the intentional exposure of blood-impregnated filter papers, from nine HIV-positive and one HIV-negative patient from the USA, to varying temperatures and humidity for different intervals, blood collection on filter paper would appear to have emerged as a satisfactory procedure for HIV seroepidemiological studies.

Blood Specimen Collection↗
PubMed1995

A laboratory exposure procedure for screening pulp and paper mill effluents for the potential of causing increased mixed function oxidase activity in fish.

To better understand the relationships between pulp manufacturing processes and mixed function oxidase (MFO) enzyme induction in fish, a practical and standardized exposure procedure is required. This study was undertaken to develop a laboratory-based exposure procedure to quantify the relative MFO induction potencies of different types of pulp and paper mill effluents. One major consideration in developing the procedure was to ensure that the protocol was practical so that tests could be performed in a short time, with small volumes of effluents and using simple experimental conditions. A series of concentration-response and time-course experiments were conducted to find the minimum time and effluent concentration which could distinguish the ability of different effluents to cause significant MFO induction in rainbow trout in the laboratory. Experiments were also conducted to determine the effects of biotic and abiotic factors such as loading density, fish size and feeding regime. This study showed that the exposure of rainbow trout in the laboratory to 10% concentration of secondary-treated effluent for 96 h caused significant increases in hepatic MFO activity. The magnitude of MFO induction was comparable to other field and laboratory observations. While fish size, loading density and feeding regime were found to affect the test results, consistent responses within a laboratory using this protocol are possible, provided that these factors are standardized. Therefore, the short-term exposure approach described in this paper could be a relevant tool for assessing the ability of different types of pulp and paper mill effluents to cause MFO induction in fish.

Journal Article↗
PubMed1988

A rapid microassay for dirofilarial antibodies by using antigen-coated nitrocellulose paper.

This study describes an enzyme (horseradish peroxidase)-linked immunosorbent assay using nitrocellulose (NC) paper (Dot-ELISA) for the detection of antibodies against Dirofilaria immitis in dogs. Dirofilarial antigens prepared were directly bound on NC paper set into a microfiltration apparatus to ensure their uniformity. Of the 23 infected dogs tested, 21 were determined positive by visual observation of brown-colored spots on NC paper. The positive and negative readings were further confirmed by using a densitometer. Sera from 15 non-infected and 17 other parasite-infected dogs were all negative, i.e. no false positive readings and low cross-reactivities were found using this technique. Also, a large number of samples could be assayed simultaneously within 1.5 h. The Dot-ELISA technique reported here may be useful to veterinarians and also may be a means of field surveying human filariasis.

Animals↗
PubMed1986

Optimized conditions for solid-phase sequencing: simultaneous chemical cleavage of a series of long DNA fragments immobilized on CCS anion-exchange paper.

A solid-phase method for simultaneous sequencing of ten or more long DNA fragments has been developed, using as support the cellulose matrix for chemical sequencing (CCS), anion-exchange paper [Rosenthal et al., Nucl. Acids Res. 13 (1985) 1173-1184]. We optimized several of the seven steps which include: (i) immobilization; (ii) washing; (iii) modification; (iv) washing; (v) sorting of the paper segments; (vi) piperidine reaction and chemical elution, and (vii) lyophilization. During carrier-supported chemical cleavage with dimethylsulfate (DMS) (G), HCOOH (A + G), KMnO4 (T greater than Pu) and NH2OH (C), losses of immobilized DNA are very low. DNA fragments ranging in length from several hundred bp up to 6 kb can be effectively chemically eluted from CCS paper during the piperidine reaction with an efficiency of more than 90%. Because no DNA salt elution and ethanol precipitation steps are necessary the method is rapid, convenient and allows complete automation.

Anions↗
PubMed1984

The role of microorganisms in the formation of pitch deposits in pulp and paper mills.

The cause of pitch deposit formation seems still not fully understood. The work reported here demonstrates that microorganisms effect the agglomeration of emulgated resin droplets and the formation of sticky precipitates. Pitch deposits from mills consist mainly of ethanol-soluble resins. It is also the ethanol-soluble fraction of wood resins which forms stable emulsions and which is easily agglomerated by microorganisms. Pitch deposits, collected from various pulp and paper mills, were all found to contain large amounts of microorganisms. Sterile resin emulsions prepared from pitch deposits remained stable over long periods. After inoculation with microorganisms the emulsions were destabilized and the resins completely precipitated as sticky lumps. Various bacteria and fungi are capable of agglomerating the resins, but species isolated from water, pulp and slime in paper mills were usually most effective. Resins from fresh wood were precipitated at a faster rate than aged resins. Problems of pitch formation can be considerably reduced when microbial growth is kept under control in the production system. To be effective, the control measures, e.g. slimicides, must be applied at the right place and time, and in the correct concentrations. This presupposes a thorough knowledge of the plant's microbiological condition which can only be obtained by microbiological examination. Practical cases of the appropriate application of biocides in pulp and paper mill systems are discussed.

Journal Article↗
PubMed1985

Writing a scientific paper prior to the research.

We propose that many potential pitfalls of a research study can be brought to light through the exercise of writing a zeroth draft of the paper before beginning formal data collection. Further, because the zeroth draft of the paper contains the elements required in most research proposals--background, rationale, approach to data analysis, methods, and significance--it may serve as a generic grant application that can be easily recast in the style required by a specific funding agency. Moreover, the task of preparing the final report after completing the study is a shorter, less painful process if one has only to revise the zeroth draft rather than face the blank page. In these ways writing the scientific paper before gathering the data can help an investigator plan, fund, execute, and report a study that asks and answers specific and important questions.

Adolescent↗
PubMedDate not supplied

The completeness of MEDLINE for papers published and abstracted in the Journal of Emergency Medicine.

The purpose of this paper is to assess whether MEDLINE, a common source for reviewing the medical literature, is complete with regard to referencing papers published and abstracted in The Journal of Emergency Medicine (JEM) over a 10-year period. In that time, 1178 abstracts and 843 original contributions were included in JEM. All papers were reviewed and classified as either a review of subject, case report with review of literature, editorial, or prospective or retrospective original research. Results showed 98.5% of all original work published in JEM and 99.74% of all abstracts referenced in JEM were found in MEDLINE, thus supporting the hypothesis that MEDLINE is a complete and thorough database for current literature.

Abstracting and Indexing↗
PubMed2004

The Australasian Triage Scale: examining emergency department nurses' performance using computer and paper scenarios.

STUDY OBJECTIVE: The purpose of this study is to examine emergency nurses' performance using triage scenarios characterized by type of patient population (adult versus pediatric) and mode of delivery (paper versus computer). METHODS: A combination of paper-based (script alone) and computer-based (script plus still photographs) triage scenarios were used. Of the 28 scenarios used, half were written and half were computer based. Within each subgroup, there were 7 adult and 7 pediatric scenarios. Participants were asked to allocate an Australasian Triage Scale category for each triage scenario. RESULTS: One hundred sixty-seven participants completed a total of 2,349 adult scenarios, and 161 participants completed 2,265 pediatric scenarios. Sixty-one percent of the triage decisions made by the nurses were "expected" triage decisions, 18% were "undertriage," decisions, and 21% were "overtriage" decisions. Nurse triage allocation decisions for the scenarios containing still photographs delivered by computer demonstrated a higher average agreement percentage of 66.2% (kappa=0.56; tau b =0.77; P <.0001) compared with the average agreement percentage of 55.4% (kappa=0.42; tau b =0.75; P <.0001) using paper-based (text-only) scenarios. CONCLUSION: The mode of delivery appeared to have an effect on the nurses' triage performance. It is unclear whether the use of simple still photographs used in the computer mode of delivery resulted in a higher incidence of expected triage decisions and, thus, improved performance. The use of cues such as photographs and video footage to enhance the fidelity of triage scenarios may be useful not only for the education of triage nurses but also the conduct of research into triage decisionmaking. However, further exploration and research in this area are warranted.

Adult↗
PubMed2006

A new approach to systematization of the management of paper-based clinical pathways.

The present study was performed to explore a new approach to systematization of the management of paper-based clinical pathways by developing a new system requiring little capital investment. A new system was developed and incorporated into an existing network at a hospital with a paper-based clinical pathway management system. The effectiveness of this new system was examined by comparing the management efficiency of clinical pathways before and after its introduction, and by comparison of the new system with other such systems currently in place at other medical institutions with regard to efficiency. In addition, the acceptability of the system for other medical institutions was examined by providing free access to the software on the Internet. The development costs of the new system were low. Although the new system has been in place for more than 3 years, no problems have yet been encountered in either the existing network system or in the management system itself. The new system allows the processing of statistics and analysis of circulation or variance automatically, neither of which were possible in the original paper-based system. We provided open access to the system as free software on the Internet, and it has since been downloaded by many medical institutions and enterprises in Japan. This system is very useful for institutions where it is difficult to introduce expensive new systems for systematic management of clinical pathways, such as electronic medical records, because of problems regarding capital or system management, and it may also be useful in other countries.

Critical Pathways↗
PubMed2006

A discussion paper about 'meaning' in the nursing literature on spirituality: an interpretation of meaning as "ultimate concern" using the work of Paul Tillich.

Spirituality is often explained in the nursing literature as the patient's quest to find meaning in life and in their experiences. This is most often described in an unlimited and unconditional way defined by whatever interpretations the person places upon it. This opens it to a variety of understandings, some of which may be negative and unhelpful in terms of what we usually consider to be spiritual well being. This discussion paper attempts to look beyond the generality of this idea to examine whether our concept of having meaning, if used in terms of spirituality, should be conditional on meanings which are actually to do with the depth of our being and not meanings which only give pleasure and satisfaction. The paper attempts to do this in two ways. First it explores the beliefs of Victor Frankl to ask the question whether having meaning alone is sufficient to provide spiritual comfort or whether the content of the particular beliefs associated with meaning, may matter. Frankl is often used as a source for the idea of spirituality being to do with meaning and in this paper Frankl's thought is explored in detail to see his own underlying beliefs which helped in his life experiences. Secondly, an understanding of 'meaning' as being conditioned by something "ultimate" described by Paul Tillich is explored. This would give nursing a more structured and purposeful approach to using the term 'meaning' in relation to spiritual care and in addition it would open up a way forward in terms of researching which particular meanings might be most helpful in illness and adversity.

Christianity↗
PubMed2005

SERS of C60/C70 on gold-coated filter paper or filter film influenced by the gold thickness.

SERS of C(60)/C(70) adsorbed on gold nanoparticles coated on filter paper or filter film was studied. As a new SERS substrate, dried gold-coated filter paper or filter film has a high SERS activity, whose enhancement factor can be up to about 10(5), because it avoided the influence of solvents in C(60)/C(70) solution and water in gold hydrosols. The influence of the gold thickness coated on filter paper or filter film to SERS of C(60)/C(70) adsorbed on gold nanoparticles was mainly discussed. It is indicated that the SERS effect of C(60)/C(70) was very sensitive to the distribution and aggregated characteristics of gold nanoparticles, and the SERS intensity of each mode increased at its own proportion, but it integrally tended to saturation when the thickness of colloidal gold coatings increased.

Journal Article↗