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Blood samples obtained from 13 of 100 (13%) and 6 of 91 (7%) horses at the George D. Widener Hospital for Large Animals in the months of June and October, respectively, had antibody to Borrelia burgdorferi as determined by ELISA. Horses from the states of New York, Maryland, Delaware, New Jersey, and Pennsylvania were seropositive for B burgdorferi. The frequency of antibody response in horses from New Jersey was greater (P less than 0.05) than the frequency of antibody response in horses from Pennsylvania or that of horses from the other states combined. Statistically significant difference was not found when a comparison was made between horses with serotiter and open diagnosis of neurologic or musculoskeletal disease and horses with negative serotest results and open diagnosis of neurologic or musculoskeletal disease.

Excited neutrinos decaying into a neutrino and a photon are searched for in the ALEPH detector at LEP. No evidence is found for Z decay into vv∗ or v∗v∗ final states. Upper limits are derived on excited neutrino couplings up to excited neutrino masses close to the Z mass. Lower limits on the v∗ mass, independent of the v∗ decay modes, are deduced from the total Z width.

A serologic survey of horses in the New Jersey-Pennsylvania area demonstrated that about 10% (6.2-14.2%) have significant levels of serum antibody to Borrelia burgdorferi. However, in a highly endemic area of central New Jersey, up to 60% of the mares and yearlings samples on one farm were seropositive. In 1983, sera from this same farm exhibited only 12% positives in mares and 35% positives in yearlings. Longitudinal studies of paired sera obtained from individual yearlings over a 6-month period in 1985 showed that 34% of them declined during the period. A new clinical syndrome associated with this farm has been observed in 1985-87. In 1985 only an edema of the legs and a dermatitis were noted, in 19.2% of the foals. There was a clustering of cases on one site, where one peer group of foals was sequestered after weaning, which suggested a point source of infection other than arthropods. In 1986, 14.6% of the foals were affected, four of them with arthritis, two of which resisted antibiotic treatment for over several months' time. Experimental infection of a pony with triturated B. burgdorferi infected tick material indicated low specific antibody levels starting about the ninth day that continued for a 3-week period. When this animal was challenged 6 months later with primary B. burgdorferi cultures, a rapid and significant booster effect was evidenced within 4 days.

The onset of fast fission was investigated with the Cl + Au system. The mass distribution of the fragments and the fusion cross sections were determined at six different bombarding energies. It turns out that the width of the symmetric component of the mass distribution increases strongly with the critical angular momentum. This could be related with the disappearance of the fission barrier due to centrifugal effects. A semi-static model is developed and the results are compared with the experimental data. In this framework, the observed broadening of the mass distribution can be attributed to the presence of the fast fission phenomenon.

In a previous paper a model has been presented which treats the pion as a collective superposition of quark-antiquark pairs. The pion wave function has strong admixtures of many-quark-many-antiquark components. This wave function is used to investigate empirical weak and electromagnetic-decay properties of the pion. The results so obtained are consistent with a small intrinsic pion radius, substantially smaller than the measured pion charge radius.

England in the late 1830s and early 1840s witnessed the progressive expansion of the Industrial Revolution. The radical change from an agrarian-based economy to that of an industrial nation was accompanied by a great public curiosity and interest in the many facets of recently announced scientific discoveries and achievements. It was inevitable, therefore, that a man of Richard Beard's calibre should not only be attracted to the invention of Daguerre, but that lie should also have a keen perception of its financial possibilities. It would be less than fair to deny that he had both courage and vision when lie undertook such a total commitment to a new and untried concept, although his initiative was not always appreciated, for he met with much adverse conlment and hostility from a number of his contemporaries. Beard's name is frequently mentioned in the literature relating to English daguerreotypes, and he has attained a brief citation in a National Biography1. However, the career of this entrepre...

A semirealistic parametrization in momentum space is used for the matrix elements of the effective nucleon-nucleon interaction. In this model, the nucleons only interact in a relative s-wave state and essentially via an exponential potential. In the Hartree-Fock approximation, algebraic expressions are derived for the self-energy and the effective mass. The strength and the range of the nucleon-nucleon interaction are chosen in such a way that these quantities are in fair agreement with the empirical values. We calculate analytically the frequency dependence of the imaginary part of the polarization and correlation contributions to the self-energy. The real part of these contributions can then be computed very accurately with the help of dispersion relations. Their frequency dependence can most conveniently be described in terms of a frequency mass m-bar. It is found that m-bar has an enhancement peak, typically 30 MeV wide, centered on the Fermi energy. The contributions of the correlation and of the polarization graphs to this local enhancement are disentangled. The contribution to m-bar of the polarization graph peaks somewhat above the Fermi energy, and that of the correlation graph somewhat below the Fermi energy. The total peak is approximately symmetric about the Fermi energy. We identify themore » range of excitation energy of those core excited states which mainly contribute to the enhancement. The enhancement peak is more pronounced at low density and for long-range interactions. The usual effective mass also displays an enhancement at the Fermi surface. The momentum distribution in the correlated ground state is calculated. The effect of introducing a hard core in the nucleon-nucleon interaction is studied.« less

The water supply of Baltimore is taken from the Gunpowder River, the headwaters of which lie in York County, Pa., near the Maryland Une. The river then flows through Baltimore County, Md., in a southeasterly direction, emptying into the Chesapeake Bay about 10 miles northeast of Baltimore. The river, though small, has steep slopes, with a drainage area of 308 square miles above present dam. Its main tributary below the fall Une is the Little Gunpowder Falls, which has the same general characteristics as the larger river. There are several small power developments along its course, of which the Warren and Phoenix Mills are the largest. Previous to 1913 the City of Baltimore received part of its water supply from an impounding reservoir in the Gunpowder Valley, this supply having first been used in 1881. The works for taking this water consist of a stone dam about 25 feet high across the river, about 7 miles northeasterly from the city limits, creating a smaU reservoir, known as Loch Raven, with an original capacity of 510,000,000 gallons, and an area of water surface of 105 acres. The elevation of the crest of the dam is 171.2 feet. All elevations in this article are based on average mean tide in Baltimore harbor. At this time the city possessed the right to divert 170,000,000 gallons per day from the Gunpowder River. This capacity became largely reduced, by the deposit of silt, until in 1900 the reservoir had a capacity of 178,000,000 gallons. At this time dredging was begun, and continued varying in amount until 1909, with an average cost per year of $25,000. No record of yardage is available for the work was done by department forces. Starting in 1906 the Water Department made plans for increased storage capacity.

Machinery for excavating earth and other material has been recognized for years as more economical and efficient than manual methods where conditions will permit the use of such mechanical equipment. In order to complete the construction of water supply and sewerage systems in the cantonments during the world war as quickly as possible, the United States Army used machinery entirely, and the results obtained have, no doubt, had a great effect on the increased use of trench excavators, cranes and backfillers by contractors and municipalities. The writer used trenching machines, cranes and backfillers entirely for the construction of the water distribution system for Camp Meade and Camp Franklin in 1918. The distribution system of Camp. Franklin and the enlargement of the Camp Meade system were completed in 2' months. Machinery of all characters was used to construct the intake and pumping stations and to enlarge the filtration plant and balancing reservoirs at Camp Meade.

Because in the closing hours of his life Dr. Johnson was unable to conclude the task of identifying his early compositions for the Gentleman's Magazine, the early canon of his work has remained obscure; and for his share in the Debates in the Senate of Magna Lilliputia we have had to rely on Boswell, who questioned Johnson at an inopportune time, for Johnson's answer did not settle the matter: “He this year [1741], and the two following, wrote the Parliamentary Debates. He told me himself, that he was the sole composer of them for these three years only. He was not, however, precisely exact in his statement, which he mentioned from hasty recollection; for it is sufficiently evident, that his composition of them began November 19, 1740, and ended February 23, 1742–3.” The vagueness of this statement has raised two questions about Johnson's portion of the debates: (1) what are the dates, initial and terminal, of Johnson's exclusive authorship, and (2) did he write any reports which fall outside of that period, that is, when he was not “sole composer” of them? In answer to the first question G. B. Hill and, more recently, Benjamin B. Hoover have established July 1741 through March 1744 as the period in which Johnson's exclusive share of the reports was published. In partial answer to the second question, Hill attributed to Johnson two debates, from the Guthrie period (which Hoover apparently overlooked in his broad discussion of authorship); and Hoover found Johnson to have revised for Cave certain reports that first appeared in the London Magazine. Still more recently, Donald J. Greene, arguing against the terminal date, ascribed to Johnson the debate on the Removal of the Hanoverian Troops, which appeared in the magazine from May to December-Supplement, 1744. If this attribution is correct, and I believe it is, then the debates which Cave published from July 1741 to December-Supplement, 1744, were, with one un-assigned exception—the short debate on the Corporation Bill which appeared in March and April 1744—written by Johnson. The purpose of this paper is to show, by reexamining the evidence concerning four debates, that one of Hill's two attributions is wrong (on Buttons and Button-holes, 1738), that the other is correct (on the Registration of Seamen, 1741), that one of the revised London debates is in all likelihood Johnson's work (on the Navy Estimates, 1740), and that the Corporation Bill, 1744, is also from his pen, thus making the sequence unbroken from July 1741 through the 1744 Supplement.

The maximum discharge that may be required of a water distribution system is the quantity to be delivered for the purpose of fighting fires, and the proper provision for such a draught is the principle obligation of the distribution system design. The quantity needed for fire protection, as compared to the total distribution capacity, is related in a general way to the population, the ratio decreasing as the population increases. A small town must devote a relatively greater proportion of its pipe line capacity to fire protection than a large city, and obviously, in the residential section of a city that proportion must be greater than in a commercial or industrial section. Likewise, the per cent of cost of the distribution system required for fire protection is inversely proportional to the population.

The activities of this Committee during the past year have been devoted to two distinct problems affecting the treatment of water for steam-making uses and for condenser purposes. a. Collection of data relative to the quality of water supplied by municipalities and its effect on the cost of operation of industrial water treatment systems. b. A study of the effect of trade wastes and domestic sewage discharged into surface streams used as a source of supply for powerplant uses.

A combination of an extra-uterine and an intra-uterine pregnancy is defined as heterotopic twin pregnancy. A case is reported where the 2 infants were born alive and have had a normal psychomotor development at 3 years of age. It is a case where the first observation taken by ultrasound made the diagnosis possible at 27 weeks of the pregnancy and therefore gave rise to the crucial problem of how to manage the case. Because of this case history we have discussed the frequency (one in every 30,000 pregnancies), the aetiological factors, the clinical factors, the prognostic factors and what is to be done. The discussion takes note of the modern ways of diagnosing it (ultrasound), of monitoring it and of handling in a specialised unit this exceptional kind of "high risk" pregnancy.

Cross sections for the production of π + and π − have been measured over a wide range of angles for 12 C + 7 Li, 12 C + 12 C and 12 C + 208 Pb collisions at 60 A , 75 A and 85 A MeV. Energy distributions are less steep and absolute yields of pions larger than expected from a straightforward Fermi gas nucleon-nucleon scattering prescription. The apparent velocity of the system in which the π + emission is symmetric, is closer to the nucleus-nucleus c.m. velocity than to the mean speed system. The Coulomb-corrected π − π + ratio is close to unity for 12 C + 12 C. The corresponding ratio for 12 C + 208 Pb is, however, much larger than expected from the neutron excess in 208 Pb only.

The mass operator for nuclear matter calculations is studied in the BHF approximation. (AIP)

Small-intestinal intussusceptions were diagnosed in 3 foals. Cross-sectional ultrasonography through the apex of the intussusceptum revealed a target-like pattern with a thick hypoechoic rim. The thick hypoechoic rim was caused by severe edema of the entering and returning walls of the intussusceptum. At the more proximal portion of the intestines, where parietal edema was less severe, the image appeared as 2 concentric rings and an inner circular area. The outer ring and inner circular area were hypoechoic and represented the returning and the entering wall of the intussusceptum. An additional cross-sectional pattern can be described as double concentric rings, with the inner lumen represented by a central echogenic core. Longitudinal scannings of the involved intestinal section revealed a different view of the same anatomic situation, with 2 hyperechoic areas delineated by 3 stripes of hypoechoic intestine. Ultrasonography of a foal's abdomen provides a clinician with a rapid noninvasive technique that may aid in the differential that may aid in the differential diagnosis of colic. The ultrasonographic diagnosis of intussusception may improve the recognition of a surgical lesion and improve the potential for successful treatment.

Since the beginning of 1980 computer assisted instruction ( = CAI) has been used systematically in special education. While England, the USA and Japan are experienced in this field, comparable attempts in Germany are rare. The possibility to use the computer for autistic children is discussed highly controversial and emotional among parents and professionals. Criticism and fears to "reinforce autistic withdrawal" are often mixed with insecurity or dislike of new technologies. On the other hand positive effects of CAI on learning and behavior are reported by parents or published as single case studies. The following paper summarizes theoretical issues, findings of the literature and experimental results. Perceptual, motivational, communication and behavior problems of autistic children are discussed under the aspect of computer assisted instruction.

We have measured the fusion excitation function of the 40Ca + 40Ca system between 112.5 and 165 MeV. The results are in agreement with those of Barreto et al., but not with those of Doubre et at. The fusion threshold which is deduced agrees with the one calculated using an interaction potential calculated by the energy density formalism. Furthermore this potential allows us to reproduce rather well the excitation function.

A 3-year-old Standardbred stallion was admitted for treatment of acute enterocolitis. The horse improved in response to empiric treatment, but subsequently developed ventral edema, scrotal abscessation, and severe laminitis. Improvement again was seen, but on day 29 of hospitalization, the horse developed rapid heart rate and signs of abdominal pain. Exploratory celiotomy revealed complete obstruction of the descending portion of the duodenum, 20 cm caudal to the duodenal sigmoidal flexure. Three-tier duodenojejunostomy and jejunojejunostomy were performed to bypass the duodenal obstruction.

By using paired sera the IgM and IgG host responses were analyzed in dogs with ELISA and Western blot techniques. Antibodies in clinical seropositive dogs bound to 4-25 IgM and up to 40 or more IgG antigenic determinants. Early IgM response to the 41-kDa flagellin persisted for at least 9 months and involved as many as seven other peptides. IgG response expanded later in the disease and involved more immunogens than are currently recognized in late human disease. A percentage of asymptomatic dogs that later developed clinical symptoms were seropositive. Immunoblot studies suggested that B. burgdorferi is persistent in both asymptomatic and weakly reactive animals and if untreated could lead to disease expression. Clinical seropositive, asymptomatic seronegative, and experimentally infected horses were similarly studied. In experimentally inoculated animals IgG antibodies were initially bound to flagellin and later to the 34- and 31-kDa polypeptides, even though ELISA values were considered only slightly reactive.

Seven horses were given 0.5 mg of carbon tetrachloride/kg of body weight via a nasogastric tube. Subsequent hepatocellular damage was monitored by serum enzyme determinations of sorbitol dehydrogenase, isoenzyme 5 of lactate dehydrogenase, and aspartate transaminase activities. Creatinine kinase activity was evaluated as an indicator of muscle cell damage. Sorbitol dehydrogenase, isoenzyme 5 of lactate dehydrogenase, and aspartate transaminase activities were significantly (P less than 0.05) increased by 24 hours after carbon tetrachloride administration. Isoenzyme 5 of lactate dehydrogenase and sorbitol dehydrogenase activities returned to baseline several days before aspartate transaminase activity returned to baseline. Creatine kinase activity remained unchanged.

We observed a width of 280 Hz for a SF/sub 6/ line in Doppler-free two-photon spectroscopy at 28.4 THz. This is 25 times less than the 'transit width' and reveals the optical selection of slow molecules. This opens a new route for frequency standards in the infrared region.

"April 1950"., "Prepared and published in cooperation with the School of Pharmacy, University of Florida, Gainesville.", Title from cover., Introduction -- General considerations -- Collection and curing -- Marketing crude drugs -- Prices -- Crude drug dealers -- Medicinal plant literature -- Collection of medicinal plants -- Stillingia -- Asclepias -- Gelsemium -- Stramonium -- Phytolacca -- Trilisa odoratissima (Walt), Cass -- Dioscorea -- Baptisia -- Styrax -- Xanthoxylum -- Myrica -- Sabal -- Sambucus -- Cultivation of medicinal plants -- Medicinal plant garden -- Aloe -- Andropogon citrata and Andropogon flexousa -- Carica papaya -- Koellia mutica -- Stramonium -- Mentha viridis -- Ricinum communis -- Zingiber -- Florida grown medicinal plants -- Primary list of medicinal plants -- Plant constituents and properties -- Secondary list of medicinal plants -- Twenty culinary herbs of Florida -- Plant life of Florida / C.T. Simpson., Due to the fact that there are ample supplies of several native drugs in the State of Florida, the collection of medicinal plants is deserving of more attention. This bulletin contains a list of native herbs which grow in commercial quantities in the localities indicated. Brief comments and descriptions are offered to aid those interested in identifying these plants and preparing them for market., Electronic reproduction. [Florida] : Board of Education, Division of Colleges and Universities, PALMM Project, 2001. Mode of Access: World Wide Web. System Requirements: Internet connectivity; Web browser software; Adobe Acrobat Reader to view and print PDF files. Electronically reproduced from Collection in George A. Smathers Libraries at the University of Florida.

"February, 1946.", "Prepared and published in cooperation with the School of Pharmacy, University of Florida, Gainesville.", Title from cover., Introduction -- General considerations -- Collection and curing -- Marketing crude drugs -- Prices -- Crude drug dealers -- Collections of medicinal plants -- Stillingia -- Ascelpias -- Gelsemium -- Stramonium -- Phytolacca -- Trilisa odoratissima (Walt.), Cass -- Dioscorea -- Baptisia -- Styrax -- Xanthoxylum -- Myrica -- Sabal -- Sambucus -- Cultivation of medicinal plants -- Medicinal plant garden -- Aloe -- Andropogon citrata and Andropogon flexuosa -- Carica papaya -- Koellia mutica -- Stamonium -- Mentha viridis -- Ricinum communis -- Zingiber -- Florida grown medicinal plants -- Primary list of medicinal plants -- Plant constituents and properties -- Secondary list of medicinal plants -- Twenty culinary herbs of Florida -- Plant life of Florida / C.T. Simpson., This bulletin is designed to give the average layman enough information to enable him to collect and place on the market a good quality of plant material for medicinal uses. Methods of collecting and curing of medicinal plants and the marketing of the products they yield are discussed. The range and habitats of specific plants along with detailed botanical descriptions are aimed at assisting in collection and curing efforts. Cultivation of other plants is also suggested., Electronic reproduction. [Florida] : Board of Education, Division of Colleges and Universities, PALMM Project, 2001. Mode of Access: World Wide Web. System Requirements: Internet connectivity; Web browser software; Adobe Acrobat Reader to view and print PDF files. Electronically reproduced from Collection in George A. Smathers Libraries at the University of Florida.