Cigarette Paper Research Articles

Control of Culture Mites by Cigarette Paper Barriers

A method to exclude mites and other contaminants from test tube cultures is described. It consists in covering the mouths of the tubes with cigarette paper which is applied by pressing the flamed r...

Control of Culture Mites by Cigarette Paper Barriers

Control of Culture Mites by Cigarette Paper Barriers

The English of 'Aufbau'

STUDY of any copy of Aufbau, the English-German newspaper for refugees1 published in New York, will reveal many striking aspects of interlingual influence. While Aufbau publishes articles in pure English side by side with articles in equally pure German, purity in either language is by no means characteristic. Except for such pure German matter as literary feuilletons and such pure English matter as a news release from a federal agency, to be able to read the paper one must actually possess a reading knowledge of both English and German, and the flexibility of a Montrealer in shifting instantly, sometimes in the very midst of a word, from one language to the other. While the English of Aufbau is on the whole excellent, one can occasionally find German influence, as might be expected. Thus, Muni, after a 'pause' of two years, makes a comeback, and a woman baker is called a 'bakeress.' Like the diction, the idiom is also sometimes Germanic. A certain young man, for example, 'is already sergeant,' and from a sports column this passage has been culled: '. . . not so much that they'll win themselves more games as that they'll lose themselves less.' Verb forms are likewise Germanic, e.g., '. . who since 1929 religiously pays six dollars a month,' and, 'Don't you come (Aren't you coming) to hear Harry?' Note also these uses of verbals: '. . . Corporation specialized in cigarette paper,' '. . . [certain refugee physicians allegedly] . . . grab good practices from leaving American doctors,' and '. . we will help building a new world.'

The Rapid Preparation of Celloidin Serial Sections Following India Ink Injections

For the study of capillary penetration in the central nervous system of the chick embryo, following India ink injections, celloidin serial sections are superior to those prepared by the paraffin technic. The celloidin sections are arranged on a moist cigarette paper mat, which when filled is inverted and applied to a microscope slide so that the sections contact the glass surface. Subsequent to dehydration and clearing the sections are isolated on the slide by peeling off the cigarette paper. Forty-five minutes are required to prepare a slide of thirty sections from the time the block is trimmed until the cover slip is mounted with Clarite.

A Micro-Kjeldahl Method Including Nitrates

Previous articleNext article No AccessA Micro-Kjeldahl Method Including NitratesRufus H. MooreRufus H. Moore Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by Volume 100, Number 1Sep., 1938 Article DOIhttps://doi.org/10.1086/334778 Views: 1Total views on this site Citations: 7Citations are reported from Crossref Journal History This article was published in the Botanical Gazette (1876-1991), which is continued by International Journal of Plant Sciences (1992-present). PDF download Crossref reports the following articles citing this article:R.B. BRADSTREET The Kjeldahl Digestion, (Jan 1965): 9–88.https://doi.org/10.1016/B978-1-4832-3298-0.50005-9R.B. BRADSTREET Digestion Procedure, (Jan 1965): 89–145.https://doi.org/10.1016/B978-1-4832-3298-0.50006-0 General Bibliography, (Jan 1965): 169–234.https://doi.org/10.1016/B978-1-4832-3298-0.50008-4Oskar Eichler Chemie, (Jan 1950): 6–70.https://doi.org/10.1007/978-3-642-99826-3_2H. E. STREET EXPERIMENTAL METHODS AVAILABLE FOR THE STUDY OF THE NITROGEN METABOLISM OF PLANTS. A REVIEW OF SOME RECENT ADVANCES, New Phytologist 48, no.11 (Feb 1949): 84–96.https://doi.org/10.1111/j.1469-8137.1949.tb05111.xE. Rauterberg, H. Benischke Die Bestimmung des Gesamtstickstoffs in nitrathaltigen Ernteprodukten, Bodenkunde und Pflanzenernährung 31, no.1-21-2 (Jan 2007): 118–125.https://doi.org/10.1002/jpln.19430310107K. Mothes Zur Biosythese der Säureamide Asparagin und Glutamin, Planta 30, no.55 (Apr 1940): 726–756.https://doi.org/10.1007/BF01917181

A New Stain for Bacterial Capsules with Special Reference to Pneumococci

After much experimentation the following method for staining bacterial capsules has been devised. It has proved of such value in a study of autolysis of pneumococci, in their identification in culture and exudates as well as in staining the capsule of Streptococcus mucosus and, with a slight modification, the capsule of the Bacillus mucosus also, that a brief report seems desirable at this time. DIRECTIONS Make a thin smear on a perfectly clean slide or cover-glass. If the material, such as sputum, is too thick, add enough distilled water so that it can be spread evenly by means of a piece of fine tissue or cigarette paper. In case of cultures (blood-agar, serum, glucose or Loeffler's blood-serum being preferable), remove a small amount of the growth from the surface of the medium and at once mix thoroughly with a loopful of serum on the slide, or, better still, make a

Health: Offering for Sale Cigarette Paper: Statutory Provisions: Interstate Commerce

Health: Offering for Sale Cigarette Paper: Statutory Provisions: Interstate Commerce

Some Observations Upon Opsonins in Pneumonia and in Four Streptococcus Infections

The technique was essentially that of Wright and Douglas. The bacterial emulsion was at first prepared by mixing the growth from agar in NaCl solution, and for the observations upon streptococci this method was adhered to on account of the necessity for thoroughly breaking up the chains; but for pneumococci, a 24-hour broth culture was found to furnish an emulsion of just the right thickness. A meatextract broth, reaction -^ 1 per cent, gave constant results. The smears were made with cigarette paper. This gave an even distribution (mainly along the edge), and caused little trauma to the leucocytes. In staining, trials were made to find a method which would stain the leucocyte so that its margins were sharp as shown by granulations, yet which would stain the organisms deeper than the nucleus, so that they could be readily seen when near or overlying the latter. For pus cocci we found that due to their great affinity for methylene blue, a few seconds' staining in Jenner gave excellent results. Pneumococci, however, were too faintly stained. When the slide was flooded with J. Homer Wright's stain for one to two minutes, rinsed, and counterstained with methylene azure for 10 to 20 seconds, the nucleus was reddish and the cocci deep purple. About 25 sera were tried, using the usual Wright-Douglas method with the above additions. The sera were normal and from pneumonia patients; usually three samples were taken from each person. The source was unknown until after the estimations were made. Duplicate preparations were also made from one tube. The time of incubation was varied, 10 minutes giving the best results for pneumococci. With a longer time the cocci stained less sharply and