Ohio Journal of Science: Volume 69, Issue 5 (September, 1969)

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https://kb.osu.edu/handle/1811/1165

Front Matter
pp 0
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A Vascular Flora of Winous Point, Ottawa and Sandusky Counties, Ohio
Lowden, Richard M. pp 257-284
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Book Review
pp 284-284
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Distribution of the A and B Cells and of the Islets (Langerhans) in the Duck Pancreas
McClish, Robert D.; Eglitis, John A. pp 285-293
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Adapting a Standard Thin-Layer Chromatography Apparatus for Laboratory Use
Wells, James R. pp 293-296
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Some Chemical Reactions in Silica Gels : III. Formatin of Potassium Acid Tartarate Crystals
Kurz, Philip F. pp 296-304
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The Influence of Light and Temperature on Body Fat and Reproductive Conditions of Rana Pipiens
Brenner, Fred J.; Brenner, Patricia E. pp 305-312
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Foods Eaten by a Beaver Colony in Southeast Ohio
Nixon, Charles M.; Ely, James pp 313-319
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Book Reviews
pp 320-320
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Back Matter
pp 999
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Now showing 1 - 10 of 10

Back Matter
(1969-09)
Book Reviews
(1969-09)
Foods Eaten by a Beaver Colony in Southeast Ohio
(1969-09) Nixon, Charles M.; Ely, James
The food habits of stream-occupying beavers {Castor canadensis) were studied at two different sites, located approximately a mile part, in Athens and Vinton Counties in southeast Ohio from August, 1964, through June, 1965. The colony, consisting of five to six beavers, both adults and kits, cut or barked 352 stems at site 1 and 1,218 stems at site 2, and averaged between 245 and 295 stems per beaver for 10 months. At site 1, ironwood, buttonbush, Virginia pine and red elm were preferred foods, while common alder, red elm, ironwood, and soft maple were preferred at site 2. The distance traveled to feed on each species indicated that alder, soft maple, and red elm were most preferred. Utilization of preferred food species closely followed their availability at both sites, but it was stems less than 2.0 inches dbh that were usually cut. Less than one percent of the stems cut were wasted. Food stocks are adequate for beaver along most streams in southeast Ohio, but conflicts with humans and with fluctuating water levels limit colony establishment. Until improved land-management practices or flood-control structures reduce present fluctuations in annual water levels, beaver colonies must remain transient on the major streams. Stream sites utilized for future transplants of beavers should be adjacent to stands of ironwood, red elm, common alder, maple (red and silver), buttonbush, and aspen, and be located where water levels are relatively stable.
The Influence of Light and Temperature on Body Fat and Reproductive Conditions of Rana Pipiens
(1969-09) Brenner, Fred J.; Brenner, Patricia E.
Specimens of Rana pipiens were subjected to different environmental conditions in order to determine the role of light and temperature on the amount and pattern of fat utilization, as well as the effects of these factors on the reproductive condition of the species. Temperature influences the amount of fat utilization; however, both light and temperature influence the pattern of fat utilization and the reproductive condition. A correlation was found between the amount and pattern of fat utilization or deposition and the reproductive condition of individuals.
Some Chemical Reactions in Silica Gels : III. Formatin of Potassium Acid Tartarate Crystals
(1969-09) Kurz, Philip F.
This work was concerned with investigating methods for growing potassium acid tartrate (KHT) crystals by chemical reaction in acidic gels prepared with tartaric acid (H2T) and sodium silicate and reacted with K+. H2T ranging from IN to 18N was used, and remarkable changes in size and perfection of shape of KHT crystals formed were noted as the concentration of H2T was increased. Gels made with H2T to 6N in strength permitted growth of mostly imperfect rhombohedra, some quite elongated and practically all veiled. Gels made with 8N, ION, 15N, and 18N H2T favored formation of clear, nonveiled, essentially perfectly shaped rhombohedra. KC1, KBr, KNO3, and K2SO4 appear equally useful as external reactants. KI permits growth of excellent crystals also, but forms HI, which reduces tartrate progressively to malate and succinate, releases I2, and produces an increasingly intense background color. K2Cr04 consumes tartrate in redox and prevents KHT formation. Potassium acetate causes gel cleavage and produces multitudes of clusters of tiny needles.
Adapting a Standard Thin-Layer Chromatography Apparatus for Laboratory Use
(1969-09) Wells, James R.
The Eastman Chromagram apparatus was employed in thin-layer chromatographic studies involving United States species of Polymnia (Compositae). Certain technical modifications of this apparatus were made in an attempt to more efficiently saturate the chamber with vapors of the eluents. Results indicated that a critical level of reproducibility could be achieved only with modified apparatus, which included the insertion of saturated "fT'-shaped filter paper, with a glass rod across the base of the "| j " , all held securely between the two glass plates by additional clips.
Distribution of the A and B Cells and of the Islets (Langerhans) in the Duck Pancreas
(1969-09) McClish, Robert D.; Eglitis, John A.
The avian pancreas differs from that of other animals in being composed of two or more lobes and in containing two islet types. Alpha (A) and beta (B) cells are located in separate islets. Islets containing beta cells are called light islets; islets containing alpha cells are called dark islets. The avian pancreas can be divided into exocrine and endocrine portions, and the endocrine portion can be further divided into light and dark islet portions. In the present study involving the duck, the volumes of the exocrine and endocrine portions were measured, and these measurements were used to calculate the relative volumetric distribution of A and B cells. The pancreases of six ducks were used. The pancreas was fixed in 10% formalin, embedded in celloidin, and serially sectioned (30 M per section). Areas of both islet types and of the entire section were measured on every tenth slide. Area measurements were then converted into volumes by assuming that each slide was representative of the adjacent ten slides. In addition to the total volume calculations, relative distribution of the islets throughout each lobe was also calculated. It was found that 99.2% of the duck pancreas is exocrine. Of the 0.8% that is endocrine, 0.3% is light islet and 0.5% is dark islet. The duck pancreas consists of two lobes with the dorsal lobe divided into three distinct segments. Neither light nor dark islets were distributed uniformly throughout either of the lobes. Both islet types were found along the central axis of the ventral lobe and were arranged in clusters near the ventral surface of the dorsal lobe. The islet clusters of the dorsal lobe tended to be located near the junctions of the lobe segments. The observations that have been made concerning distribution of the light and dark islets are based on area measurements of serial sections of the entire pancreas, on islet counts made by observation of consecutive serial sections, and on paper models constructed from the serial sections. No attempt was made in the area measurements to differentiate Ai, A2, and D, or clear cells, in the dark islets, although cells appearing to contain few or no granules were observed with the light microscope, especially in the dark islets.
Book Review
(1969-09)
A Vascular Flora of Winous Point, Ottawa and Sandusky Counties, Ohio
(1969-09) Lowden, Richard M.
This study describes the present-day vascular flora of the marshes, woodlots, dikes, and drainage ditches of Winous Point, which is located approximately 3 1/2 miles southwest of Port Clinton, Ohio, near the mouth of Muddy Creek, at the western end of Sandusky Bay. Vascular plants found are recorded in a catalogue. Changes in the floristic composition of the marshes are discussed by comparing A. J. Pieters' observations (1901) of some marsh plants at the western end of Lake Erie with the present marsh flora. Plants reported by Pieters but not found at the present are predominantly submersed or partially emersed rooted aquatics, such as Elodea canadensis Michx., Nais flexilis Rost & Schmidt., Sagittaria graminea Michx., Vallisneria americana Michx., and some Potamogeton species. Zizania aquatica L. was common at the turn of the century, while at present it is uncommon. In 1901 Phragmites communis Trin. formed "extensive associations," while now it is common only in small scattered patches. Pieters reported Typha latifolia L. as everywhere and T. angustifolia L. as rare. Now T. angustifolia is very common, whereas T. latifolia is found only sporadically. Sagittaria rigida Pursh and S. latifolia Willd. are also reversed in frequency, with S. rigida rare today and S. latifolia now common. Factors that probably have contributed to these floristic changes, as exemplified by the above species, are construction of drainage ditches in the Black Swamp, marsh management practices at Winous Point, and pronounced physiographic changes that have occurred over the past 150 years (based on maps) at the mouths of Muddy Creek and the Sandusky River.
Front Matter
(1969-09)

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