Expression of the neural cell adhesion molecule NCAM in endocrine cells

We examined the expression of the neural cell adhesion molecule NCAM in a number of endocrine tissues of adult rat and in an endocrine tumor cell line. NCAM was found by immunoelectron microscopy to be present on the surface of all endocrine cells in the three lobes of the hypophysis, although staining was relatively less intense in the intermediate lobe, and in pancreatic islets. Pituicytes, hypophyseal glial cells, were also labeled for NCAM. A rat insulinoma cell line (RIN A2) also expressed NCAM as judged by immunocytochemistry. Analysis of NCAM antigenic determinants (Mr 180, 140, and 120 KD) revealed large variations in the relative proportions of NCAM polypeptides present in the different tissues. Although all tissues and cell lines expressed NCAM-140, NCAM-180 was not detected in the adenohypophysis, pancreas, or adrenal medulla, and NCAM-120 was found in none of the endocrine tissues or cell lines except at low levels in the neurohypophysis. The tumor cell line expressed significant levels of NCAM-180, which was most abundant in the neurohypophysis. These results show that NCAM expression appears to be a general property of endocrine cells, although the antigenic composition differs markedly from that in brain tissue. These data are discussed with regard to the embryological origins of the different endocrine tissues, and possible functional implications are suggested

The development of a high temperature static strain gage system

The objective of this program is to develop electrical resistance strain gages which will permit the measurement of static strains on nickel and cobalt superalloy parts inside gas turbine engines running on a test stand. The specific goal is to develop a complete system able to make strain measurements up to plus or minus 2000 mu strain with a total error of no more than plus or minus 10 percent over a 50 hour period at 1250 K. The initial part of this work consisted of a strain gage alloy development effort in which a variety of alloys were evaluated after being prepared by drop-casting or splat cooling

Studies of satellite support to weather modification in the western US region

The applications of meteorological satellite data to both summer and winter weather modification programs are addressed. Appraisals of the capability of satellites to assess seedability, to provide real-time operational support, and to assist in the post-experiment analysis of a seeding experiment led to the incorporation of satellite observing systems as a major component in the Bureau of Reclamations weather modification activities. Satellite observations are an integral part of the South Park Area cumulus experiment (SPACE) which aims to formulate a quantitative hypothesis for enhancing precipitation from orographically induced summertime mesoscale convective systems (orogenic mesoscale systems). Progress is reported in using satellite observations to assist in classifying the important mesoscale systems, and in defining their frequency and coverage, and potential area of effect. Satellite studies of severe storms are also covered

The Kilowatt-Hour Meter in a Student Experiment

In our general physics course for non-science students, we have for some years given the students a chance to experiment with electrical equipment usually found in the home, and to make it more real, we have arranged a panel to simulate a house with the main entrance switch, fuse block, kilowatt-hour meter, and two branch fuse blocks; one going to an ordinary group of switches and outlets, and the other to a lamp to be controlled by two three-way switches. Regular commercial fixtures, switches, flush receptacles, etc., are used throughout. The student is given a pair of pliers, screwdriver, roll of tape, etc., following a lecture on safety precautions such as tight connections, soldered joints, conduit, etc. The wiring is then done by the students and in so far as time permits, they are allowed to use the trial and error method as the circuit is well protected by fuses

Alien Registration- Tapley, Grant O. (Greene, Androscoggin County)

https://digitalmaine.com/alien_docs/30215/thumbnail.jp

Temperature Changes Accompanying the Adiabatic Extension and Compression of Metals

The metals in the form of vertical wires are extended and compressed by the addition and removal of a load within the elastic limit. The temperature change is a transient effect, the magnitude of which was originally worked out by Lord Kelvin to be ϑ = tep/JkQ where ϑ=temperature change, p =stress, t=temperature (Kelvin,) e = linear coefficient of expansion, J =mechanical equivalent of heat, k =specific heat (Cp), ϱ=density. A modified Carey Foster resistance bridge is used, comparing the resistance of the wire with a standard. Since the effect is of short duration, the wire is inside a polished stainless steel tube to permit more time to balance the bridge, as the method used is practically a null method. Allowance is made for changes in resistance due to tension. So far the results are satisfactory although the changes on compression have been larger than those on extension in the case of steel wire. After a cyclical loading-unloading of the wire, the two values have come pretty well together. Similar results were found for tungsten and nickel

An Elastomagnetic Effect

The effect of stress upon the magnetic properties of ferromagnetic materials has been known and studied for many years. The name usually associated with this is Villari1. Matteucci discovered that pulling or stretching a ferromagnetic rod changes its magnetic induction. Villari, however, with greater refinement of method found that if an icon rod is stretched when weakly magnetized its magnetic induction will be increased, whereas stretching the same rod in a strong field its magnetic induction will be decreased. This is known as the Villari reversal effect

Physics in the Army Specialized Training Course at Grinnell College

The basic course consisted of 4 class hours and 3 hours of laboratory per week for terms of 12 weeks. Term I-Mechanics, Term II-Heat, Sound and Light, Term III-Electricity. Only the first two terms were completed but this paper is primarily a study of the work done in Mechanics. 150 Basic Trainees started Term I in September. Of this number, 109 completed the term and took the final Form E examination. Another group of 38 students started Term I in December and completed it in March. An aptitude test (Penn State) was given to all trainees at the beginning of the term, and at the end Form E of the Cooperative Tests was administered in addition to an army G. I. test

The Role of Parental and Family Involvement in the Persistence of Freshman First-Generation College Students

The number of first-generation college students has increased steadily over the years. These students faced many barriers to their academic success as they transitioned to college including limited support from family members. This qualitative study utilized a phenomenological approach to understand what role, if any, the support of parents and family helped first-generation students to persist in their academics during the first year of college. Six sophomore first-generation college students from a private Catholic institution in an urban setting in the Midwest were interviewed for the study along with six of their family members. The sophomore first-generation students reflected on their experiences during the first year of college. Participants discussed how they perceived and understood family support in their home life, the relationships between students and parents, and the way students interacted with their peers. Three findings emerged from the research: (1) the support provided by parents was instrumental in helping first-generation college students persist during their first year in school, (2) students and parents understood the college experience from different points of views, resulting in family tension and a “push and pull” dynamic that fostered an educational resilience among the students, (3) parents were more able to support students with financial resources and emotional encouragement and less able to address mental health issues. These findings showed the need for parental programming to support the educational experiences of first-generation college students and mechanisms to help parents become aware of the mental health challenges of students