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Properties of the Active Site of Enzymes

Description: In this paper some studies on enzyme properties which are believed to be pertinent to antibodies will be discussed. The particular studies chosen are; (a) the evidence that residues far removed from each other in the sequence play vital roles at the active site; (b) indications on the size of the active site; and (c) evidence for flexibility at the active site. Since the relation between enzyme and antibody is of primary interest an attempt will be made to emphasize the fundamental conclusions … more
Date: 1962
Creator: Koshland, Jr., Daniel E.
Partner: UNT Libraries Government Documents Department
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Cumulative Radiation Effects of Sexual Reproduction in Pine and Oak

Description: The sexual reproductive ability of a forest exposed to low level ionizing radiation is dependent on the sensitivity of primordial differentiation, meiotic processes leading to the formation of gametes, fusion of the gametes, and subsequent growth of the sporophytic generations. In this report it was shown that the initiation of reproductive primordia in Pinus rigida, Quercus ilicifolia, Quercus alba and Quercus coccinea is not unusually sensitive to irradiation. Trees which had been severely da… more
Date: 1962
Creator: Mergen, Francois & Stairs, G. R.
Partner: UNT Libraries Government Documents Department
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Progeny Test from a Pitch Pine-Oak Forest, Damaged by Low Level Chronic Gamma Radiation

Description: Ionizing radiation is useful to plant breeders in obtaining mutations beneficial from an economic point of view. This report, however, concerns our basic knowledge of radiation: attention is here directed to some effects of low level radiation on the R₁ progeny. Approximately one third of the land area of the United States is covered by forest; thus, forest trees form an important component of our natural wealth. It is therefore our obligation to know how these forests will react to low level i… more
Date: 1962
Creator: Mergen, Francois & Stairs, G. R.
Partner: UNT Libraries Government Documents Department
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Clonal Multiplication of Cymbidiums Through Tissue Culture of the Root Meristem

Description: The propagation of clonal varieties of some orchids is at times exasperatingly slow and occasionally an almost futile effort. Clonal multiplication is generally confined to dividing mature plants and to starting plants from pseudobulbs. There is, of course, the specialized technique for obtaining Phalaenopsis plantlets from the aseptic culture of inflorescence nodes, but this is basically the same thing as propagating plants from pseudobulbs. In certain cases it is highly desirable to rapidly m… more
Date: 1962
Creator: Wimber, Donald E.
Partner: UNT Libraries Government Documents Department
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"Ages" of the Sikhote Alin Meteorite

Description: The potassium-argon age of the Sikhote Alin iron meteorite has been determined. The value is 1.7 + 0.2 x 10⁹ years. Previous lead data suggest an age of 4.6 x 10⁹ years . The date of solidification may be the sum of these two ages.
Date: 1962
Creator: Fisher, David E.
Partner: UNT Libraries Government Documents Department
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0-2 kv Flash Tube Supplies

Description: In order to perform the various experiments with a bubble chamber, a high intensity flash tube is used. This report briefly describes the power supplies designed and constructed to power these lamps.
Date: March 15, 1962
Creator: Miller, D. M.
Partner: UNT Libraries Government Documents Department
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6 kv Capacitor Charging Supply

Description: The power supplies designed and constructed to power high intensity flash tubes used in bubble chamber experiments are briefly described and are accompanied by a schematic diagram of the layout. (D.C.W.)
Date: March 15, 1962
Creator: Miller, D. M.
Partner: UNT Libraries Government Documents Department
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Low Frequency Amplifier IH-130-1

Description: A tranistorized d.c. coupled amplifier having very good gain stability, as well as very low drift of the output d.c. level, has been designed. Low frequency input signals with an amplitude of .04 to 2 volts peak-to-peak, approximately, coming from a low impedance source (voice soil of a speaker system) are amplified to an approximate peak-to-peak amplitude of 4 volts. The output is intended to drive a load of the order of 100 kohm.
Date: October 23, 1961
Creator: Llacer, Jorge
Partner: UNT Libraries Government Documents Department
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Servo Stabilized RF Vernier Time-of-Flight Analyzer

Description: The analyzer can be operated either internally or externally. The 10 ma germanium discriminator is quiescently biased to 8.5 ma in its low-voltage state. An input signal current of 3.5 ma or more triggers it to its high voltage state. This triggers the oscillator. The oscillator signal is buffered and mixed in the bridge modulator with the reference radiofrequency signal from the cyclotron. The low-frequency beat note from the bridge modulator is squared up and passed to the beat zero univibrat… more
Date: January 15, 1962
Creator: Chase, Robert L.
Partner: UNT Libraries Government Documents Department
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Beam Current Integrator

Description: The object of this report is to acquaint the operator with the operational and technical aspects of the beam current integrator as well as the theory of the system operation. The design and operation of a beam current integrator are described, and the theory of operation is discussed. The instrument has two channels. The console channel is designed to measure the accumulation of charge received by a target during a period of a day no matter what the range used in the experimenter's channel. An … more
Date: January 5, 1962
Creator: Jacobs, J.
Partner: UNT Libraries Government Documents Department
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Digital-to-Analogue Converter (Punched Tape to X-Y Plotter)

Description: A digital-to-analog converter is described which is a part of a system that converts punched-tape digital data to analog data in a series of points drawn by an x-y plotter. The converter is designed to plot accurately tapes that contain information other than coded numerical coordinates. Operation of the converter is also described along with format requirements and power supplies. (J.R.D.)
Date: January 17, 1962
Creator: Wall, G. N.
Partner: UNT Libraries Government Documents Department
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Possible Use of a Betatron Core on the Cosmotron

Description: Most existing electron synchrotrons use betatron start for initial acceleration of the particles. The subsequent synchrotron acceleration is then performed with a nearly constant radio-frequency. Investigation of the effect of turn-on rate and initial energy spread is made mathematically. Several advantages are seen for such a technique. (D.C.W.)
Date: January 18, 1962
Creator: Smith, L. W.
Partner: UNT Libraries Government Documents Department
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Magnetic Measurement of AGS Experimental Magnets

Description: This is a preliminary report on the magnetic measurements taken to date on the AGS experimental magnets. It mainly summarizes the results which were necessary for the setting up of the proton separated beam in August 1961. A few curves on information obtained since then are included. When the study is finished, a complete report on all phases of the work, including the methods used, will be forthcoming.
Date: December 26, 1961
Creator: Danby, Gordon T.
Partner: UNT Libraries Government Documents Department
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Efficiency pf Multiple Traversal Targets

Description: The efficiency of multiple traversal targets is defined as the probability that a proton dies by making a nuclear collision in the target rather than by hitting the limit of the synchrotron aperture. The efficiencies of Be, Al, Cu, and Pb targets are shown for 15 and 30-Bev protons in the Brooknaven AGS. Beryllium was found to be the most efficient. (M.C.G.)
Date: February 5, 1962
Creator: Courant, E.D.
Partner: UNT Libraries Government Documents Department
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Internal Bunching in the Alternating Gradient Synchrotron (AGS)

Description: Four methods of rebunching protons within Brookhaven's AGS are discussed. The first method involving switching off the old r-f and switching on the new r-f simultaneously with the new r-f increasing adiabatically seems impractical. Two other methods utilize gradual removal of the old r-f voltage and introduction of the new r-f voltage, or the reverse. Removal of the old r-f voltage followed by introduction of the new seems to give the best results. Several phase diagrams are included. (D.C.W.)
Date: January 16, 1961
Creator: Robertson, D. S.
Partner: UNT Libraries Government Documents Department
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Acceleration of Polarized Protons to Relativistic Energies

Description: Maintenance of polarization of polarized protons in a linear accelerator is known to be feasible. Circular accelerators present a different problem, and the investigation of the interaction of orbit dynamics and particle polarization in general is undertaken. The equation of motion of the spin vector of a charged particle in a magnetic field as formulated by Bargmann, Michel, and Telegdi is utilized in the study of depolarization for several accelerators. High values of depolarization are obtai… more
Date: January 22, 1962
Creator: Courant, E.D.
Partner: UNT Libraries Government Documents Department
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Computations for AGS Experimental Beams: Description of Computer Program

Description: Description of a computer program which optimizes the locations and strengths of magnets for experimental beams at the Brookhaven AGS written for the IBM 7090 computer. Layout, method, and routines are given particular attention, and representative data cards are shown.
Date: December 15, 1961
Creator: Baker, Winslow F.
Partner: UNT Libraries Government Documents Department
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Time Dependence of Space Charge Beam Losses in the Cosmotron

Description: An investigation was made of Cosmotron intensity versus time through the entire time interval from the beginning of injection to the completion of r-f capture. The induction electrode signal was used for the instantaneous measurement of beam intensity. Oscilloscope displays of the signal were photographed and traced. Base lines were filled in on the tracings and the area of the pulses measured with a polar planimeter. It was found that the relation losses of beam intensity increase with injecti… more
Date: January 4, 1962
Creator: Barton, M. Q. & Sacharidis, E. J.
Partner: UNT Libraries Government Documents Department
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Some Properties of Stub Tuners Which Can Be Displayed On Smith Charts

Description: Use of the Smith chart in studying stub tuners is demonstrated. Several properties of the tuners are shown, and charts for various wave length spacings, tuning trajectories, and admittances are included.
Date: May 9, 1962
Creator: Walters, J. L.
Partner: UNT Libraries Government Documents Department
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The Ball Tuner Change Tables

Description: Technique used in deriving values of the linac ball tuner settings to produce various fields is discussed briefly, and tables showing ball tuner change numbers and values used in making up the ball tuner change numbers are given.
Date: May 3, 1962
Creator: Walters, J. L.
Partner: UNT Libraries Government Documents Department
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Design of Reflectometers for Coaxial Lines Used at AGS LINAC

Description: This report describes the design procedure for a reflectometer or directional coupler to replace the probe part of the D07-1020 assembly used at the Brookhaven Alternating Gradient Synchrotron linac. Mathematical treatment and diagrams of various reflectometers are included.
Date: May 9, 1962
Creator: Walters, J. L.
Partner: UNT Libraries Government Documents Department
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Target Efficiency Measurements at the AGS

Description: Two methods for measuring target efficiencies are briefly discussed. The second method puts an upper bound on the efficiency and permits observation of instantaneous efficiency, thereby aiding location of losses. Measurements agree well with conventional radiochemical values.
Date: June 6, 1962
Creator: Maschke, A. W.
Partner: UNT Libraries Government Documents Department
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Non-Linear Bunch Motion at Transition

Description: A summary of the dynamic behavior of the proton bunches in the Brookhaven Alternating Gradient Synchrotron (AGS) has been given previously. In these reports, the usual linearization of the differential equations involved has been made and the theory was restricted to well bunched beams. The linearized approach is no longer valid at transition where the actual phase angle of the bunch can differ appreciably for a short time from the stable phase angle Φ₀. In this report the non-linearity of the … more
Date: December 4, 1961
Creator: Hahn, Harald
Partner: UNT Libraries Government Documents Department
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Servo System for Magnetic Controlled Constant Intensity Flat Top Beam Spill-Out

Description: A uniform intensity flat top spill-out cannot be obtained by manual control for two reasons: 1. The horizontal density of the internal beam of the Cosmotron is far from uniform. As a result, a manually controlled linear motion of the internal beam into a target will result in a non-uniform spill-out intensity. 2. Stability requirements of the Cosmotron magnet voltage are not easily met without feedback because of inherent component stability. The proposed servo system will sense the external be… more
Date: November 21, 1961
Creator: Cottingham, J. G.
Partner: UNT Libraries Government Documents Department
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