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[New study on the history of anesthesiology (2)--who is the first Japanese to write a scientific paper for the journal "Anesthesiology"?].

The beginning of modern anesthesiology in Japan dates back to 1950 when Dr M. Saklad of Rhode Island Hospital came to Japan to give his lectures on endotracheal anesthesia and related procedures. Since then, many Japanese surgeons visited the United States to learn anesthesiology in depth and they began to write their papers for foreign journals. According to my survey of the journal "Anesthesiology" from Vol 1 (1940) through Vol 21 (1960), I found 12 scientific papers written by Japanese. The first paper by Japanese appeared in this journal published in 1955 entitled as "Observations on the action of thiopental (Pentothal) on the laryngeal reflex" by Akira Horita et al. He was born in the United States in 1928 as a son of Japanese immigrants. He was graduated from the University of Washington at Seattle to become professor or pharmacology. The first paper based on studies performed in Japan by Japanese authors appeared in 1956. It was entitled as "The spread of drugs used for spinal anesthesia" by Kitahara et al. This paper is the English translation of their Japanese paper which appeared in Nippon Rinsho Geka Ikai Zasshi entitled as "Basic Study on Spinal Anesthesia in 1953".

Anesthesiology↗

Introductory course on getting to know journals and on "browsing" a research paper: first steps to proficiency in scientific communication.

AIM: To evaluate the effectiveness and appropriateness of a course that promotes familiarity with biomedical periodicals and teaches efficient reading skills. METHODS: A 16-hour course was designed to help inexperienced readers gain confidence navigating the contents of a research paper (instead of reading only abstracts), and make the first steps to critical appraisal. The course consisted of short lessons and small group work in which research papers were read and presented to the class. Participants learned a method called "browsing" that guides the first, superficial reading of a research paper and substitutes abstract reading. The course was administered to 15 hospital physicians and 40 graduate students of molecular medicine, in 4 separate sessions. RESULTS: At course entry, 45 of 55 participants normally read the abstract before consulting the body of a research paper. An end-of-course questionnaire, completed by 47 participants, revealed that only 3 would still read the abstract first, while 33 would perform browsing, 7 would scan figures and tables, and 4 would consult another section of a paper outside of their research interests; similar responses were given for a research paper within their fields. For 43 participants, the course was effective in developing reading skills. On a final comprehension test, participants had a median score of 69% correct responses (interquartile range, 56%-80%). CONCLUSION: This introductory course on reading scientific articles is effective in overcoming abstract-only reading and in developing confidence with the research literature. Considering participants' subjective evaluation and test scores, the course contents are appropriate for both physicians and young researchers.

Biomedical Research↗

Two methods of scoring sleep with the Oxford Medilog 9000: comparison to conventional paper scoring.

This study evaluated two methods of scoring taped polysomnographic data directly on the Medilog 9000 scanner: (a) screen-by-screen scoring, and (b) rapid screen scoring. Sixteen overnight polysomnograms recorded on Medilog 9000 recorders were scored using the above two methods and were also printed on paper for conventional paper scoring. Interscorer agreement was 87.8% for paper scoring, 85.5% for screen-by-screen scoring, and 84.2% for rapid screen scoring. Comparison of screen-by-screen scoring with paper scoring revealed small absolute deviations and correlations of r greater than 0.90 for all sleep parameters, with the exception of brief (less than 2 min) awakenings (r = 0.69). Rapid screen scoring resulted in slightly lower correlations and greater deviations from paper scoring on several sleep parameters, but appeared acceptable for most clinical purposes and greatly reduced the required scoring time. Although some statistically significant differences between scoring methods were observed, the size of effect was small and of doubtful clinical importance. These findings suggest that polysomnographic data recorded on Medilog 9000 recorders can be reliably and accurately scored on the Medilog scanner, obviating the laborious task of printing the taped data on paper.

Adolescent↗

Focus paper: A method for discussing nursing issues.

A position paper can be one avenue or method of providing a framework for discussing nursing issues with peers, colleagues, and health care executives. A position paper/issue paper will frequently focus on one view with subsections, but can raise many other questions as well as touching on additional nursing issues. It should be clear when developing a position paper that the goal of the paper is to provide a framework for discussion--with the major emphasis being on issues being raised, not resolved. The paper should also address how nursing is affected by these issues and how the entire hospital may be affected. Last, a position paper should also articulate your--the nurse executive's--position on the issues under discussion.

Communication↗

Editorial policy of Magnesium Research: general considerations on the quality criteria for biomedical papers and some complementary guidelines for the contributors of Magnesium Research. Society for the Development on Magnesium Research.

The quality criteria of biomedical journals--and of 'Magnesium Research' as such--are being given a new insight. This has practical implications for the contributors and the editors. General considerations on the patterns of evaluation of scientific papers highlight five types of errors, that may be incurred in submitted manuscripts. 1. The information conveyed may remain ambiguous: for example, lack of discrimination between acute and chronic patterns, or confusion between the clinical and toxicological consequences of pharmacological and physiological studies: for example it is a real scientific fraud to identify the absent toxic effects of physiological magnesium supplementation with those of high pharmacological magnesium doses ... which in fact may induce toxicity. There should be no confusion between in vitro and in vivo data, with a good understanding of the systemic neuroendocrine metabolic and renal regulations and of the multiple local targets concerned. It is always important to discriminate between the two types of deficit: deficiency due to insufficient intake which merely requires oral physiological supplements and depletion related to a dysregulation which requires more or less specific correction of its causal dysregulation. 2. Insufficient information retrieval, frequently with consultation of one data-base only. Because of indexing omissions and word usage idiosyncrasies, no literature search can retrieve all papers. Monographs and books of proceedings are rarely mentioned in databases and therefore escape consultation. It is obvious, besides, that some of the quoted references have sometimes not been read, but only the title (and in the best cases also the abstract), occasionally with the remaining misprints. A good specific and general knowledge of the background of the study is necessary. 3. Basic methodological errors. Coexistence does not mean causality. Analogous patterns do not demonstrate an identical aetiopathogenesis. The complexity of biology must not be disregarded just because the present trend focuses on one aspect of knowledge at the expense of many others. 4. Thought processes must be unbiased. Citation of supportive papers to the prejudice of unsupportive papers constitutes a real ethical fraud. It seems also very important to submit for publication papers with negative results as well as ones with positive results. In studies on pharmacological indications for magnesium, choice of the magnesium salt used ought to be justified and the efficiency must be evaluated vs reference treatment. 5. Observance of the formal regulations is frequently neglected, in the presentation of manuscripts particularly. Some guidelines should therefore be added to the directions to contributors. Before establishing valuable protocols and in order to write up well structured introductions, discussions and conclusions, the authors should have a comprehensive view of their subjects, that is to say an overall knowledge of the previous general and specific publications related to the topic which must be read. Title, conclusions and abstract ought to be taken into account in the discussion. References should be duly consulted or mentioned as 'cited in'. There should be strict observance of the presentation of the manuscripts according to the directions to contributors. Studies resulting in negative results should not be disregarded. Reciprocally, the editorial policy requires that editors and referees ought to be strict as regards the quality criteria. Although editors and peer reviewers are in no position to detect basic fraud they can, however, highlight errors, whether due to simple oversight or to more subtle ethical or scientific pseudo-frauds. Both conclusive and inconcern papers may deserve publication: positive and negative results equally concern public health. To conclude, the editorial board must be ready to reject dubious manuscripts but must at the same time keep their minds open to consider in a positive l

Animals↗

Paper or screen, mother tongue or English: which is better? A randomized trial.

CONTEXT: To compare family physicians' ability to retain information when reading a review article on paper vs on screen, and in their mother tongue vs in English. METHODS: Randomized trial of 114 Scandinavian family physicians who read a review article in October or November 2000 from the Journal of Trauma for 10 minutes either on paper and in English, on screen and in English, on paper in their mother tongue, or on screen in their mother tongue. To assess comprehension, they immediately completed a questionnaire with 6 open questions about 13 key facts from the review article. Sum score was on a scale from 0 (no correct answers) to 13 points (all questions answered correctly). RESULTS: There was no significant difference between readers of paper vs screen versions, with a median (interquartile range [IQR]) of 4 (2-6) vs 4 (2-5), respectively (P =.97). Physicians who read in their mother tongue scored significantly higher than those who read in English, with a median (IQR) of 4 (3-6) vs 3 (2-4) (P =.01). CONCLUSION: The medium (paper vs screen) did not influence the ability of family physicians to retain medical information. They best retained medical information when reading in their mother tongue.

Adult↗

Health effects of working in pulp and paper mills: exposure, obstructive airways diseases, hypersensitivity reactions, and cardiovascular diseases.

Workers in the pulp and paper industry are exposed to different substances, such as hydrogen sulfide and other reduced sulfur compounds, chlorine, chlorine dioxide, sulfur dioxide, terpenes, and paper dust. The exposure level depends on the process, i.e., sulfite, sulfate, groundwood, bleachery, or paper production. Hitherto, exposures have been poorly described and more studies are certainly needed. Workers with repeated exposure peaks to chlorine, e.g., bleachery workers, seem to have an impaired lung function and an increased prevalence of respiratory symptoms. Exposure to high levels of paper dust, (> 5 mg/m3) causes impaired lung function. Therefore, exposure to respiratory irritants is an important, and probably overlooked, occupational risk among certain groups of pulp and paper workers. Some studies indicate that sulfate workers with high exposure to reduced sulfur compounds have an increased mortality due to ischemic heart disease. However, before any definite conclusions can be drawn, the impact of important confounders, such as shift-work and smoking habits have to be further evaluated.

Air Pollutants, Occupational↗

Mutagens in a river heavily polluted with paper recycling wastes: results of field and laboratory mutagen assays.

Paper recycling industries generate considerable quantities of waterborne wastes, and thus water pollution constitutes the greatest environmental problem associated with this industrial activity [Hunt and Franklin, 1973]. Generally the impact of this water pollution is considered in terms of aesthetic blight and deterioration of water quality. We present data that document another aspect of this pollution, the environmental contamination of an aquatic ecosystem with mutagenic materials. A natural population of the fern Osmunda regalis growing in a river heavily polluted with paper recycling wastes had a high incidence of chromosome mutations. This population was monitored for four years for the frequency of two-break chromosome mutations. These mutations were postzygotic in origin and suggested the presence of mutagens in the river water. The fern population is downstream from the outfalls of a paper recycling mill, which was discharging 13.3 X 10(6) liters of untreated paper recycling waste per day. In 1977 a waste-water-treatment facility was constructed to remove the solid waste previously discharged into the river. This facility generates 69,300 kg of solid waste daily, which is taken to a landfill. Periodic samples of this solid waste were collected from the waste-treatment facility in the summer of 1978, extracted with various solvents, and the extracts tested for mutagenic activity with the Salmonella/mammalian microsome mutagenicity test [Ames et al, 1975]. A majority of the solid waste samples contained mutagenic materials, but in all cases S-9 activation was required for mutagenic activity. The samples also were assayed with the soybean mitotic crossing-over assay [Vig, 1975]. Four out of six samples were positive. These results document the presence of mutagens in the solid waste generated by a paper recycling industry and the genetic impact of these mutagens on the local biota.

Chromosome Aberrations↗

Comparative detection of measles and rubella IgM and IgG derived from filter paper blood and serum samples.

We compared the use of serum and filter paper blood spots as specimen sources for the detection of measles- and rubella-specific IgM and IgG. We collected capillary blood into microtainer tubes and onto filter paper spots from 60 children and 60 healthy adults. The blood was collected from 12-15-month-old children approximately 3 weeks after primary vaccination with measles, mumps, rubella vaccine, and the sample-pairs were tested for measles-specific IgM and IgG antibodies by using a capture antibody EIA and an indirect EIA, respectively. We tested sample-pairs from a subset of participants for rubella- specific IgM and IgG antibodies by using commercially available capture IgM (Captia) and indirect IgG (Wampole) assays. The concordance of results from serum and filter paper blood spots was high for all assays: 98% for measles IgM, 93% for measles IgG, 94% for rubella IgM, and 93% for rubella IgG, and increased to between 96-100% for all four assays when indeterminate samples were excluded. The correlation coefficients for EIA signals were 0.99 and 0.77 for measles IgM and IgG, respectively, and 0.92 and 0.94 for rubella IgM and IgG, respectively. The cut-off values used for filter paper samples were the same as those used for serum samples for all tests except for the rubella IgM assay. The use of filter paper blood spots is a promising future option for the detection of measles- and rubella-specific antibodies.

Adult↗

Effects of paper on performance of antibiotic-impregnated disks.

Grades of paper used in the manufacture and assay of antibiotic susceptibility disks have significant effects on the diffusion of antibiotics from the paper when compared to a control grade of paper. The papers also evoke different microbiological responses to changing concentrations of some antibiotics. Regulatory implications and the need for further standardization of assays among control laboratories are explored. Grades of paper generally used for assay and control of susceptibility disks, on the other hand, appear to be comparable to each other in both respects.

Absorption↗

Adsorption and selection of rhizobia with ion-exchange papers.

Ion exchange papers were used to study the adsorption of 32P-labelled rhizobia on defined surfaces. Two strains of Rhizobium japonicum and one each of R. leguminosarum and R. lupini were compared with Escherichia coli and Bacillus subtilis. The ratio of adsorption to strong and to weak acid papers/strong and weak basic papers was consistantly higher for all rhizobial strains compared to the other bacteria. The process of desorption by increasing the ion-concentration causes about 35% desorption between 0.02 and 0.1 M MgCl2, however, an increase to 1 M does not desorb more labelled Rhizobium japonicum or E. coli cells. The ratio of adsorbed cpm to colony formers, desorbed by 0.1 M NaCl was similar with Rhizobium japonicum for all six ion exchange papers. For E. coli this ratio varied widely for the different papers. The selection of Rhizobium against a more closely related bacterium by this adsorption/desorption procedure was demonstrated with mixed cultures of Rhizobium japonicum and Chromobacterium violaceum giving a more than 80 fold enrichment of the former. Rhizobium japonicum cells, ad/desorbed from all ion exchange papers kept their infectivity and formed nodules on Glycine max with an activity of 20-40 nM C2H4-hr(-1)-mg nodule(-1). A desorption of Rhizobium japonicum from soybean roots also occurred by increasing the ion concentration. 2-3 times as many cells were removed in this way compared to washing with water.

Adsorption↗

Location by paper chromatography of compensatory ovarian hypertrophy (COH) inhibiting activity in acetic acid extracts from bovine pineals.

Acetic acid extracts of bovine pineals and cerebral cortex were separated on Sephadex G-25 columns. Subsequently two low molecular weight fractions, F2 and F3, were ultrafiltered through the membranes UM2 and UM05. The UM05 residues were gel filtered on Sephadex G-15 columns or chromatographed on Dowex W50-X4 columns. Fractions from these columns were tested and those which showed COH-inhibiting activity were separated by preparative paper chromatography in different solvents. The absorption spectra of those fractions were recorded and tested for COH-inhibiting activity were separated by preparative paper chromatography in different solvents. The absorption spectra of those fractions were recorded and tested for COH-inhibition. By these methods, a COH-inhibitor was localized in three different solvents. Some active paper chromatography fractions were studied in high pressure, reverse phase, liquid chromatography. This latter method showed that the active fractions obtained by paper chromatography contain several orthophthlaldehyde (OPT) positive compounds. Key words: acetic acid, bovine pineal extracts, compensatory ovarian hypertrophy (COH), paper chromatography, high pressure, reverse phase, liquid chromatography.

Acetates↗

Demonstration of digital radiographs by means of ink jet-printed paper copies: pilot study.

Different digital medical images have been printed on paper with a continuous ink jet printer, and the quality has been evaluated. The emphasis has been on digital chest radiographs from a computed radiography system. The ink jet printing technique is described as well as the handling of the image data from image source to printer. Different versions of paper prints and viewing conditions were compared to find the optimum alternative. The evaluation has been performed to maximize the quality of the paper images to make them conform with the corresponding film prints and monitor images as much as possible. The continuous ink jet technique offers high-quality prints on paper at a considerably lower cost per copy compared with the cost of a film print. With a future switch-over from diagnosing of digital images on film to diagnosing them on monitors, hard copies for demonstration purposes will occasionally be needed. This need can be filled by ink jet-printed paper copies.

Copying Processes↗

Effects of recycled paper dust extracts on isolated guinea pig trachea.

The effect of paper dust collected at two different locations in a paper recycling plant (PD1 and PD2) on isolated nonsensitized guinea pig tracheal smooth muscle was studied in vitro. Dust extracts were prepared as a 1:10 w/v aqueous solution. Dose-related contractions of guinea pig tracheal rings were elicited with both PD1 and PD2. Pharmacologic studies were performed with atropine (10(-6) M), indometacin (10(-6) M), pyrilamine (10(-6) M), LY171883 (10(-5) M), nordihydroguaiaretic acid (10(-5) M), and TMB8 (10(-5) M). The possible role of endogenous neuropeptides in this constrictor process was studied by depleting neural mediators with capsaicin (5 x 10(-6) M) before challenge with dust extracts. Constrictor effects were partially inhibited by a wide variety of the mediator blocking agents. The effects of both extracts were almost totally inhibited by the anticholinergic agent atropine, suggesting that a principal pathway mediating this response may involve the parasympathetic nervous system. The intracellular calcium-blocking agent TMB8 also induced a reduction of the contractile responses to PD1 and PD2 consistent with the well established role of intracellular calcium in smooth muscle constriction. Pretreatment with capsaicin significantly increased the contractile activity of paper dust extracts but only at the higher doses of these extracts. This suggests that the effect of paper dust is not initiated by the release of mediators stored in sensory nerves but that the prerelease of these mediators may enhance the constrictor effects of these dusts. We suggest that paper dust extracts cause dose-related airway smooth muscle constriction possibly associated with the release of cholinergic as well as other mediators. The constrictor effect does not require tissue presensitization or the release of neuropeptides from sensory nerves.

Animals↗

Detection of Bacillus cereus group bacteria from cardboard and paper with real-time PCR.

The aim of this study was to develop a PCR-based rapid method to detect Bacillus cereus group cells from paper and cardboard. Primers targeting the 16S rDNA and real-time PCR with SYBR green I detection were used in order to be able to also quantify the target. Both autoclaved cardboard samples spiked with B. cereus vegetative cells or spores and naturally contaminated paper and cardboard samples were studied. Results were compared with culturing verified by commercial (API) tests. Several different methods were tested for DNA isolation from the paper and cardboard samples. Two commercial kits intended for soils, the UltraClean soil DNA kit and the FastDNA spin kit for soil, gave the most reproducible results. In spiked samples, the average yield was 50% of added vegetative cells, but spore yield was only about 10%. PCR results from adding vegetative cells correlated with added colony-forming unit (cfu) values ( r=0.93, P <0.001) in the range 100-10,000 cfu g(-1). Three out of nine studied paper and cardboard samples contained B. cereus group bacteria, based both on culturing and real-time PCR. The numbers were 10(2)-10(3) bacteria g(-1); and PCR gave somewhat higher results than culturing. Thus, real-time PCR can be used as a rapid semi-quantitative method to screen paper and cardboard samples for contamination with B. cereus group bacteria.

Bacillus cereus↗

Biological deinking of inkjet-printed paper using Vibrio alginolyticus and its enzymes.

Recycling of office waste paper (photocopy, inkjet, and laser prints) is a major problem due to difficulty in removal of nonimpact ink. Biological deinking of office waste paper is reported using several microorganisms and their enzymes. We report here deinking and decolorization of the dislodged ink particles from inkjet printed paper pulp by a marine bacterium, Vibrio alginolyticus isolate no. NIO/DI/32, obtained from marine sediments. Decolorization of this pulp was achieved within 72 h by growing the bacterium in the pulp of 3-6% consistency suspended in seawater. Immobilized bacterial cells in sodium alginate beads were also able to decolorize this pulp within 72 h. The cell-free culture supernatant of the bacterium grown in nutrient broth was not effective in deinking. However, when the culture was grown in nutrient broth supplemented with starch or Tween 80, the cell-free culture supernatant could effectively deink and decolorize inkjet-printed paper pulp within 72 h at 30 degrees C. The culture supernatant of V. alginolyticus grown in the presence of starch or Tween 80 showed 49 U ml(-1) and 33 U ml(-1) amylase and lipase activities, respectively. Dialysis of these culture supernatants through 10 kDa cut-off membrane resulted in a 35-40% reduction in their efficiency in decolorizing the pulp. It appears that amylase and lipase effectively help in dislodging the ink particles from the inkjet printed-paper pulp. We hypothesize that the bacterium might be inducing the formation of low molecular weight free radicals in the culture medium, which might be responsible for decolorization of the pulp.

Amylases↗

'Key paper' for covalent binding of proteins and its uses.

A simple method for covalent coupling of proteins to filter paper modified with quinone groups is described. This paper, termed 'Key paper' is flexible, stable on storage and does not require any activation before use. Proteins bound to Key paper can be detected by enzyme immunoassay, radioimmunoassay or Coomassie blue staining. Bound enzymes retain their enzymatic activity. Nucleic acids do not bind and do not interfere with the activity of the bound proteins. Because of its mechanical and chemical properties Key paper is a good matrix for electroblotting and for direct in situ analysis of proteins.

Antibodies↗

Cellulose, hemicelluloses, lignin and ash content of some organic materials and their suitability for use as paper pulp supplements.

Freshwater algal biomass and orange and lemon peels were assessed as tissue paper pulp supplements. Cellulose and hemicellulose contents of algal biomass were 7.1% and 16.3%, respectively, whereas for citrus peels cellulose content ranged from 12.7% to 13.6% and hemicellulose from 5.3% to 6.1%. For all materials, lignin and ash content was 2% or lower, rendering them suitable for use as paper pulp supplements. The addition of algal biomass to paper pulp increased its mechanical strength significantly. However, brightness was adversely affected by chlorophyll. The addition of citrus peels in paper pulp had no effect on breaking length, increased bursting strength and decreased tearing resistance. Brightness was negatively affected at proportions of 10%, because citrus peel particles behave as coloured pigments. The cost of both materials is about 45% lower than that of conventional pulp, resulting in a 0.9-4.5% reduction in final paper price upon their addition to the pulp.

Biomass↗