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  • Organic Chemistry  (3,063)
  • General Chemistry  (2,356)
  • Cell & Developmental Biology  (1,061)
  • Polymer and Materials Science  (440)
  • Aircraft Design, Testing and Performance  (211)
  • AERODYNAMICS  (33)
  • Numerical Methods and Modeling
  • 1945-1949  (3,430)
  • 1940-1944  (3,734)
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Keywords
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Years
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  • 1
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    Appreciation and Prediction of Flying Qualities (1949)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The material given in this report summarizes some of the results of recent research that will aid the designers of an airplane in selecting or modifying a configuration to provide satisfactory stability and control characteristics. The requirements of the NACA for satisfactory flying qualities, which specify the important stability and control characteristics of an airplane from the pilot's standpoint, are used as the main topics of the report. A discussion is given of the reasons for the requirements, of the factors involved in obtaining satisfactory flying qualities, and of the methods used in predicting the stability and control characteristics of an airplane. The material is based on lecture notes for a training course for research workers engaged in airplane stability and control investigations.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TR-927
    Format: application/pdf
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  • 2
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    Investigation of Aerodynamic and Icing Characteristics of Recessed Fuel-Vent Configurations (1949)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An investigation has been conducted in the NACA Cleveland icing research tunnel to determine the aerodynamic and icing characteristics of several recessed fuel-vent configurations. The vents were investigated aerodynamically to obtain vent-tube pressures and pressure distributions on the ramp surface as functions of tunnel-air velocity and angle of attack. Icing investigations were made to determine the vent-tube pressure losses for several icing conditions at tunnel-air velocities ranging from 220 to 440 feet per second. In general, under nonicing conditions, the configurations with diverging ramp walls maintained, vent-tube pressures greater than the required marginal value of 2 inches of water positive pressure differential between the fuel cell and the compartment containing the fuel cell for a range of angles of attack from 0 to 14deg at a tunnel-air velocity of approximately 240 feet per second. A configuration haying divergIng ramp sldewalls, a 7deg ramp angle; and vent tubes manifold,ed to a common plenum chamber opening through a slot In the ramp floor gave the greatest vent-tube pressures for all the configurations investigated. The use of the plenum chamber resulted in uniform pressures in all vent tubes. In a cloud-icing condition, roughness caused by ice formations on the airfoil surface ahead of the vent ramp, rather than icing of the vent configuration, caused a rapid loss in vent-tube pressures during the first few minutes of an icing period. Only the configuration having diverging ramp sidewalls, a 7 ramp angle, and a common plenum chamber maintained the required vent-tube pressures throughout a 60-minute icing period, although the ice formations on this configuration were more severe than those observed for the other configurations. No complete closure of vent-tube openings occurred for the configurations investigated. A simulated freezing-rain condition caused a greater and more rapid vent-tube pressure loss than was observed for a cloud-icing condition.
    Keywords: AERODYNAMICS
    Type: NACA-TN-1789
    Format: application/pdf
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  • 3
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    Wind-Tunnel Tests of a 0.16-Scale Model of the Douglas MX-656 Airplane at High Subsonic Speeds (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Wind tunnel tests of the 0.16-scale Douglas MX-656 model were made at low and high subsonic Mach numbers to investigate the static longitudinal- and lateral stability characteristics. The tests shows that undesirable changes in longitudinal stability at the stall were apparently caused by an altered downwash pattern at the tail. The jettisonable nose fins were highly destabilizing. Compressibility effects for the test Mach numbers were not detrimental to the longitudinal- or lateral-stability characteristics.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SA9D26
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  • 4
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    Wind-Tunnel Tests of a 0.16-Scale Model of the Douglas MX-656 Airplane at High Subsonic Speeds. II - Wing and Fuselage Pressure Distribution (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Measurements of wing and fuselage pressure distributions were made at low and high subsonic Much numbers on a 0.16-scale model of the projected MX-656 research airplane. The MX-656 is a supersonic design utilizing a low-aspect-ratio wing and tail. Pressure-distribution measurements indicated that, although the critical Mach number of the wing was approximately 0.81 at 0 degree angle of attack, compressibility effects were of little significance below a Mach number of at least 0.90. The principal effect of compressibility was an increase in the pressure gradient over the after 30 percent of the wing chord, causing a tendency for the flow to separate. At 0.40 Mach number, the wing stalled abruptly at approximately 12 deg, angle of attack. The wing-pressure distribution showed this stall was a result of complete separation of the flow from the upper surface of the wing, Deflecting the leading-edge flaps delayed the stall to a higher angle of attack with some increase in the maximum section normal force,
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SA9H22
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  • 5
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    On the Installation of Jet Engine Nacelles on a Wing Fourth Partial Report: Pressure-Distribution Measurements on a Sweptback Wing with Jet Engine Nacelle (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The present report, which deals with pressure-distribution measurements made on a sweptback wing with a jet engine nacelle, is similar to a report on pressure-distribution measurements on a rectangular wing with a jet engine nacelle (second partial report). Here, in investigations preliminary to high-speed measurements, as in the second partial report, useful arrangements and fillet designs have been discovered.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1226 , ZWB Der Luftfshrtforschung des Generalluftzeugmeisters Berlin-Adlershof, Untersuchungen und Mitteilungen Nr. 3176; Rept-3176
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  • 6
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    Test Report on Three- and Six-Component Measurements on a Series of Tapered Wings of Small Aspect Ratio (Partial Report: Trapezoidal Wing) (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The present report, which forms the first of six articles on experiments with airfoils of aspect ratio from 1 to 3 and various planforms, deals with the three- and six-component measurements made on the trapezoidal wing series in the 2.15 x 3-meter wind tunnel of the DVL at the request of the Henschel Aircraft Company.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1225 , ZWB Luftfahrtforeschung des Generalluftzeugmeisters - Berlin-Adelerehof, Untersuchungen und Mitteilungen Nr. 1023/1; Rept 1023/1
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  • 7
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    Longitudinal Stability and Control Characteristics of a Semispan Wind-Tunnel Model of the XF7U-1 Airplane and a Comparison with Complete-Model Wind-Tunnel Tests and Semispan-Model Wing-Flow Tests (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: An investigation was conducted on an 0.08-scale semispan model of the Chance Vought XF7U-1 airplane in the Langley high-speed 7- by 10-foot tunnel in the Mach number range from 0.40 to 0.97. The results are compared with those obtained with an 0.08-scale sting-mounted complete model tested in the same tunnel and with an 0.026-scale semispan model tested by the wing-flow method. The lift-curve slopes obtained for the 0.08-scale semispan model and the 0.026-scale wing-flow model were in good agreement but both were generally lower than the values obtained for the sting model. The results of an unpublished investigation have shown that tunnel-wall boundary-layer and strut-leakage effects can came the difference noted between the lift-curve slopes of the sting and the semispan data. Fair agreement was obtained among the data of the three models as regard the variation of pitching-moment coefficients with lift coefficient. The agreement between the complete and the semispan models was more favorable with the vertical fine on, because the wall-boundary-layer and strut leakage effects were less severe. In the Mach number range between 0.94 and 0.97, ailavator-control reversal was indicated in the wing-flow data near zero lift; Whereas, these same trends were indicated in the larger scale semispan data at somewhat higher lift coefficients.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9A13
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  • 8
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    Wind-Tunnel Tests on Various Types of Dive Brakes Mounted in Proximity of the Leading Edge of the Wing (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The present report is concerned with a series of tests on a model airplane fitted with four types of dive flaps of various shapes, positions, and incidence located near the leading edge of the wing (from 5 to 20 percent of the wing chord). Tests were also made on a stub airfoil fitted with a ventral dive (located at 8 percent of the wing chord). The hinge moments of the dive flaps were measured.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1161 , Relazione Tecnica No. 10: Ministereo dell' Aeronautica Direzione Superiore Studi ed Esperienze
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  • 9
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    Response of a Rotating Propeller to Aerodynamic Excitation (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The flexural vibration of a rotating propeller blade with clamped shank is analyzed with the object of presenting, in matrix form, equations for the elastic bending moments in forced vibration resulting from aerodynamic forces applied at a fixed multiple of rotational speed. Matrix equations are also derived which define the critical speeds end mode shapes for any excitation order and the relation between critical speed and blade angle. Reference is given to standard works on the numerical solution of matrix equations of the forms derived. The use of a segmented blade as an approximation to a continuous blade provides a simple means for obtaining the matrix solution from the integral equation of equilibrium, so that, in the numerical application of the method presented, the several matrix arrays of the basic physical characteristics of the propeller blade are of simple form, end their simplicity is preserved until, with the solution in sight, numerical manipulations well-known in matrix algebra yield the desired critical speeds and mode shapes frame which the vibration at any operating condition may be synthesized. A close correspondence between the familiar Stodola method and the matrix method is pointed out, indicating that any features of novelty are characteristic not of the analytical procedure but only of the abbreviation, condensation, and efficient organization of the numerical procedure made possible by the use of classical matrix theory.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-8I07
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  • 10
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    Resistance and Spray Characteristics of a 1/13-Scale Model of the Consolidated Vultee Skate 7 Seaplane, TED No. NACA DE 338 (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: A model of a Consolidated Vultee Aircraft Corporation Skate 7 sea-plane:was tested in Langley tank no= 2. Resistance data, 'spray photographs, and underwater photographs,are given in this report without discussion.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9G21
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  • 11
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    An NACA Vane-Type Angle-of-Attack Indicator for use at Subsonic and Supersonic Speeds (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: A vane-type angle-of-attack indicator suitable for measurements at both subsonic and supersonic speeds has been developed by the National Advisory Committee for Aeronautics. A brief history is given of the development, and a wind-tunnel calibration of the indicator is presented, together with a discussion of the corrections to be applied to the indicated readings.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-L9F28a
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  • 12
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    Landing Procedure in Model Ditching Tests of Bf 109 (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The purpose of the model tests is to clarify the motions in the alighting on water of a land plane. After discussion of the model laws, the test method and test procedure are described. The deceleration-time-diagrams of the landing of a model of the Bf 109 show a high deceleration peek of greater than 20g which can be lowered to 4 to 6g by radiator cowling and brake skid.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1247 , Wasserlandung Bf 109. Institut fuer Seeflugwesen er Deutschen Versuchaanstalt fuer Luftfahrt, E. V.
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  • 13
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    An Investigation of a Full-Scale Model of the Republic XF-91 Airplane in the Ames 40- By 80-Foot Wind Tunnel: Pressure Data (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: Wind-tunnel tests of a full-scale model of the Republic XF-91 airplane were conducted to determine the distribution of pressure over the external wing fuel tank installation and over the vee tail and ventral fin. The data were obtained for a range of angles of attack and sideslip and elerudder deflection angles; the presentation is in tabular form.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SA9C25
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  • 14
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    Pressure-Distribution Measurements on the Tail Surfaces of a Rotating Model of the Design BFW - M31 (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: In order to obtain insight into the flow conditions on tail surfaces on airplanes during spins, pressure-distribution measurements were performed on a rotating model of the design BFW-M31. For the time being, the tests were made for only one angle of attack (alpha = 60 degrees) and various angles of yaw and rudder angles. The results of these measurements are given; the construction of the model, and the test arrangement used are described. Measurements to be performed later and alterations planned in the test arrangement are pointed out.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1220 , ZWB Forschungsbericht Nr. 704; Rept-704
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  • 15
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    The Influence of the Application of Power during Spin Recovery of Multiengine Airplanes (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The effect of application of power, so far not clarified, is investigated in the present report in order to give the pilot, in addition to the control measures, an expedient for spin recovery of multiengine airplanes. To this end, a series of spins was performed with an airplane of the Go 150 type. It was possible to set up a uniform rule regarding the effect of power, for right end left spins as well as for any combination of the direction of rotation of the propellers.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1219 , ZWB Forschungsbericht Nr. 1536; Rept 1536
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  • 16
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    Ditching Tests of a 1/18-Scale Model of the Lockheed Constellation Airplane with Speedpak Attached (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: Results of previous model ditching tests of the Lockheed Constellation airplane are reported. Further model tests have been made to determine the probable ditching characteristics and the proper ditching technique for the airplane with the Speedpak attached. This paper presents the results of these tests. Design information was furnished by the Lockheed Aircraft Corporation. A three-vies drawing of the airplane with the Speedpak attached is shown. The tests were made in calm water at the Langley tank no.2 monorail.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9H05a
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  • 17
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    Flight Investigation of 6.25-Inch-Diameter Deacon Rocket and 10-Inch-Scale Model Rocket (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: Flight tests were conducted at the NACA Pilotless Aircraft Research Station, Wallops Island, to determine the characteristics of the Allegany Ballistics Laboratory's 6.2inch-diameter Deacon and lO-inch-scale model solid-propellant rocket motors. The tests were performed to assist in the development of these rockets which were designed for, and urgently needed to propel supersonic research models and pilotless aircraft. The tests showed that the rocket motors functioned properly under various flight- acceleration loads over a range of pre-ignition grain temperatures. A maximum velocity of 4180 feet per second was obtained at an elapsed time of 2.9 seconds with the 6.25-inch Deacon rocket motor at a gross weight of l9O pounds. Free-flight data of drag coefficient for the Deacon configuration for a Mach number range of 1.1 to 3.6 have been obtained from flight tests of several pounds. Camera studies of the take-off and flights of the Deacon rocket shared no evidence of breakup of propellant grains. An analysis of the forces to which the Deacon rocket grain is subjected was made. The analysis shows that the grain loading is most severe near the beginning and near the end of the rocket action time. The 10-inch-scale model rocket motor is a scaled model of the l6-inch- diameter multi-perforated, cast-grain rocket motor. A maximum velocity of 1625 feet per second at a time of 1.075 seconds was obtained at a gross weight of 309 pounds.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-L8H26
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  • 18
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    Free-Spinning-Tunnel Investigation of a 1/20-Scale Model of the McDonnell XF2H-1 Airplane (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A spin-recovery investigation has been conducted in the Langley 20-foot free-spinning tunnel on a 20-scale model modified to represent the McDonnell XF2H-1 airplane. The project included tests both with tip tanks installed and with the tanks removed. The results indicated that the recovery characteristics of the airplane would be satisfactory for all loadings by normal recovery technique (full reversal of the rudder, followed 1/2 turn later by movement of the elevator down). The rudder pedal and the elevator stick forces likely to be encountered in a spin should be within the capabilities of the pilot.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9F17
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  • 19
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    General Characteristics of a Airspeed System using Fuselage Static Vents on a Swept-Wing Airplane (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Studies have been made by the NACA wing-flow method of the use of fuselage static orifices between the wing and tail of a swept-wing airplane for possible application to service airspeed installations. The tests were made at zero angle of attack. The results indicate that, although the maximum errors are large, these locations are usable from the consideration that the local Mach numbers at the locations studied are sensitive to variation of the true Mach number within the test Mach number range of 0.7 to 1.2. The maximum errors in Mach number in the subsonic range varied from zero for the most forward location to -0.05 for the most rearward location (indicated Mach number less than true). At Mach numbers above 1.0, the maximum errors were from 0.14 for the most forward location to 0.04 for the most rearward location.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9J21
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  • 20
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    Take-off Stability Characteristics of a 1/13-scale Model of the Consolidated Vultee Skate 7 Seaplane (TED No. NACA DE 338) (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The take-off stability characteristics of a Consolidated Vultee Aircraft Corporation Skate 7 seaplane were determined in the Langley tank no. 2. Trim limits of stability, trim tracks, and elevator limits of stability are presented.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9D28a
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  • 21
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    High Speed Stability and Control Characteristics of a 0.17-Scale Model of the McDonnell XF2H-1 Airplane (TED No. NACA DE 318) (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: High-speed wind-tunnel tests were conducted of two versions of a 0.17-scale model of the McDonnell XF2H-1 airplane to ascertain the high-speed stability and control characteristics and to study means for raising the high-speed buffet limit of the airplane, The results for the revised model, employing a thinner wing and tail than the original model, revealed a mild diving tendency from 0.75 to 0.80 Mach number, followed by a marked climbing tendency from 0.80 to 0.875 Mach number. The high-speed climbing tendency was caused principally by the pitching-moment characteristics of the wing. At 0.875 Mach number the results for the revised model indicated stick-fixed directional instability over a limited range of yaw angles, apparently caused by separated flow over the vertical tail. The test results indicate that the high-speed buffet limit of the airplane can probably be raised by reducing the thickness and changing the relative location of the horizontal and vertical tails, and by revising the inner portion of the wing to have a lower thickness-to-chord ratio and reduced trailing-edge angle. The addition of the wing-tip tanks to the revised model resulted in a forward shift in the neutral point below 0.82 Mach number.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SA9C31
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  • 22
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    Aerodynamic Characteristics of a 0.5-Scale Model of the Fairchild XSAM-N-2 Lark Missile at High Subsonic Speeds (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An investigation was conducted to determine the longitudinal- and lateral-stability characteristics of a 0.5-scale moue1 of the Fairchild Lark missile, The model was tested with 0 deg and with 22.5 deg of roll. Three horizontal wings having NACA 16-009, 16-209, and 64A-209 sections were tested. Pressures were measured on both pointed and blunt noses. The wind-tunnel-test data indicate that rolling the missile 22.5 deg. had no serious effect on the static longitudinal stability. The desired maneuvering acceleration could not be attained with any of the horizontal wings tested, even with the horizontal wing flaps deflected 50 deg. The flaps on the 64A-209 wing (with small trailing-edge angles and flat sides) were effective at all flap deflections, while the flaps on the 16-series wings (with large trailing-edge angles) lost effectiveness at small flap deflections. The data showed that rolling moment existed when the vertical wing flaps were deflected with the model at other than zero angle of attack. A similar rolling moment probably would be found . with the horizontal wing flaps deflected and the model yawed.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SA9I28 , NACA DE322
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  • 23
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    Hovering and Low-Speed Performance and Control Characteristics of the Kaman Helicopter Rotor System as Determined on the Langley Helicopter Tower. TED No. NACA DE 205 (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An investigation has been conducted with the Langley helicopter tower to obtain basic performance and control characteristics of the Raman rotor system. Blade-pitch control is obtained in this configuration by utilizing an auxiliary flap to twist the blades. Rotor thrust and power required were measured for the hovering condition and over a range of wind velocities from 0 to 30 miles per hour. The control characteristics and the transient response of the rotor to various control movements were also measured. The hovering-performance data are presented as a survey of the wake velocities and the variation of torque coefficient with thrust coefficient. The power required for the test rotor to hover at a thrust of 1350 pounds and a rotor speed of 240 rpm is approximately 6.5 percent greater than that estimated for a conventional rotor of the same diameter and solidity. It is believed that most of this difference is caused by th e flap servomechanism. The reduction in total power required for sustentation of the single-rotor configuration tested at various wind velocities and at the normal operating rotor thrust was found to be similar to the theoretical and experimental results for ro tors with conventionally actuated pitch. The control effectiveness was determined as a function of rotor speed. Sufficient control was available to give a thrust range of 0 to 1500 pounds and a rotor tilt of plus or minus 7 degrees. The time lag between flap motion and blade-pitch response is approximately 0.02 to 0.03 second. The response of the rotor following the blade-pitch response is similar to that of a rotor with conventionally actuated pitch changes. The over-all characteristics of the rotor investigated indicate that satisfactory performance and control characteristics were obtained.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9I27
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  • 24
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    Full-Scale Hydrodynamic Evaluation of a Modified Navy J4F-2 Amphibian with a 0.425-Scale XP5M-1 Hull Bottom. TED No. NACA DE325 (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An investigation was made to evaluate the hydrodynamic qualities of a 0.425-scale model of the Navy XP5M-1 hull, which was installed on a modified Navy J4F-2 amphibian. Longitudinal and directional stability during take-off and landing, low-speed maneuverability, spray characteristics, and take-off performance were investigated. The behavior of the airplane in moderately rough water was also observed. The opinions of three pilots have been correlated with the data.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9L07a
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  • 25
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    Flight Test of the Aerojet 7KS-6000 T-27 Jato Rocket Motor (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A flight test of the Aero jet Engineering Corporation's 7KS-6000 T-27 Jato rocket motor was conducted at the Langley Pilotless Aircraft Research Station at Wallops Island, Va, to determine the flight performance characteristics of the motor. The flight test imposed an absolute longitudinal acceleration of 9.8 g upon the rocket motor at 2.8 seconds after launching. The total impulse developed by the motor was 43,400 pound-seconds, and the thrusting time was 7.58 seconds. The maximum thrust was 7200 pounds and occurred at 4.8 seconds after launching. No thrust irregularities attributable to effects of the flight longitudinal acceleration were observed. Certain small thrust irregularities occurred in the flight test which appear to correspond to irregularities observed in static tests conducted elsewhere. A hypothesis regarding the origin of these small irregularities is presented.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SL9L13a
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  • 26
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    A Preliminary Analysis of the Flying Qualities of the Consolidated Vultee MX-813 Delta-Wing Airplane Configuration at Transonic and Low Supersonic Speeds as Determined from Flights of Rocket-Powered Models (1949)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: A preliminary analysis of the flying qualities of the Consolidated Vultee MX-813 delta-wing airplane configuration has been made based on the results obtained from the first two 1/8 scale models flown at the NACA Pilotless Aircraft Research Station, Wallop's Island, VA. The Mach number range covered in the tests was from 0.9 to 1.2. The analysis indicates adequate elevator control for trim in level flight over the speed range investigated. Through the transonic range there is a mild trim change with a slight tucking-under tendency. The elevator control effectiveness in the supersonic range is reduced to about one-half the subsonic value although sufficient control for maneuvering is available as indicated by the fact that 10 deg elevator deflection produced 5g acceleration at Mach number of 1.2 at 40,000 feet.The elevator control forces are high and indicate the power required of the boost system. The damping. of the short-period oscillation is adequate at sea-level but is reduced at 40,000 feet. The directional stability appears adequate for the speed range and angles of attack covered.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-Sl9E13
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    NASA TECHNICAL REPORTS
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    Investigation of the Effect of Tip Tanks on the Wing Loading of a Republic F-84 Airplane in the Ames 40- by 80-foot Wind Tunnel (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Wind-tunnel tests at low Mach number of a Republic F-84C airplane were conducted to determine by pressure-distribution measurements the air loads on wing-tip tanks and the change in wing load distribution due to the presence of tip tanks. Measurements of the aeroelastic twist of the wing were also obtained. Results are presented in the form of loading coefficient, center-of- pressure location, pitching-moment coefficient, aerodynamic-center location, and aeroelastic twist. The investigation revealed that the redistributions in loading brought about by either the tip tanks or elastic deformation of the wing were relatively small when compared with the chnnges in loading normally associated with the deflection of an aileron.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SA9B02
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    NASA TECHNICAL REPORTS
  • 28
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    The Effects of Horizontal-Tail Location and Wing Modifications on the High-Speed Stability and Control Characteristics of a 01.17-Scale Model of the McDonnell XF2H-1 Airplane (TED No, NACA DE336) (1949)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An additional series of high-speed wind-tunnel tests of a modified 0.17-scale model of the McDonnell XF2H-1 airplane was conducted to evaluate the effects of a reduction in the thickness-to-chord ratios of the tail planes, the displacement of the horizontal tail relative to the vertical tail, and the extension of the trailing edge of the wing. Two tail-intersection fairings designed to improve the flow at the tail were also tested. The pitching-moment characteristics of the model were improved slightly by the use of the thinner tail sections. Rearward or rearward and downward displacements of the horizontal tail increased the critical Mach number at the tail intersection from 0.725 to a maximum of 0.80, but caused an excessive change in pitching-moment coefficient at the higher Mach numbers. Extending the trailing edge of the wing did not improve the static longitudinal-stability characteristics, but increased the pitching-down tendency between 0.725 and 0.825 Mach numbers prior to the pitching-up tendency. The extended wing did, however, increase the Mach numbers at which these tendencies occurred. The increase in the Mach numbers of divergence and the tuft studies indicate a probable increase in the buffet limit of the prototype airplane. No perceptible improvement of flow at the tail intersection was observed with the two fairings tested on the forward tail configuration.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-RM-SA9J14
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  • 29
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    Über die Affinität wasserlöslicher Substanzen zu Wolle und ihre antibakterielle Aktivität (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 8-17 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden gewisse Ähnlichkeiten zwischen Wolle und Bakterien festgestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320103
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  • 30
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    Über einige Derivate des 2-Aminothiazols (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 35-38 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2-Amino-5-n-propylthiazol und 2-Amino-4-n-butylthiazol wurden synthetisiert und auf ihre biologische Wirkung untersucht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320108
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  • 31
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    Über die Carotinoide aus den Staubbeuteln von Lilium candidum. Cis-Antheraxanthin (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 50-55 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In Staubbeuteln von Lilium candidum wurde als Hauptpigment ein cis-Antheraxanthin gefunden, das gut krystallisiert, durch chlorwasserstoffhaltiges Chloroform in Mutatoxanthin und durch Jod und Belichtung teilweise in trans-Antheraxanthin übergeführt wird. Erst das erste in der Natur gefundene Carotinoid-epoxyd mit cis-Konfiguration.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320111
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  • 32
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    Über das γ-Bromcrotonaldehyd-diacetat (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 77-86 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Einwirkung von N-Bromsuccinimid auf Crotonaldehyd-diacetat entstand das γ-Bromcrotonaldehyd-diacetat. Diese Substanz liess sich in DL-Erythrit, in die stereoisomeren 2,3,4-Tribrom-butanaldiacetate, in Octadien-(2,6)-dial (1,8)-tetraacetat und in das Disemicarbazon- und Di-p-nitrophenylhydrazon des Fumardial-dehyds überführen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320115
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  • 33
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    Zur Kenntnis der aktiven jodhaltigen Eiweißstoffe der Schilddrüse (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 115-133 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es wird die Isolierung eines dijodtyrosinhaltigen und eines thyroxinhaltigen Polypeptids aus dem Schilddrüseneiweiss auf fermentativem Wege beschrieben.
    Additional Material: 6 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320119
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  • 34
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    über eine Mikrobestimmung des Oxyprolins in Blut und Harn; Beeinflussung des Oxyprolin-Gehaltes durch Verabreichung von Prolin (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 149-153 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es wird eine Methode beschrieben, die es ermöglicht, den Oxyprolingehalt in kleinen Mengen Blut und Harn zu bestimmen.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320123
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  • 35
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    Untersuchungen über die freien Aminosäuren im Blute bei verschiedener Ernährung. II. Die entbehrlichen Aminosäuren (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 153-163 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Es wurde bei der Ratte die Beeinflussung von 9 entbehrlichen Aminosäuren des Blutes durch verschiedene Ernährung geprüft.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320124
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  • 36
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    Versuche zur Herstellung künstlicher Komplexantigene der Steroidreihe. 3. Mitteilung. Die Kupplung von Δ5-3β-Oxy-ätio-cholensäure-azid mit Eiweiss (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 191-197 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Synthese des Δ5 β-Oxy-ätio-cholensäure-azids und dessen Kupplung mit Pferde- und Kaninchenserum beschrieben. Ein entsprechendes Δ5-3-Chlor-ätio-cholensäure-derivat konnte nicht in reiner Form isoliert werden. Allgemein aber erwies sich die Azidmethode als zur Herstellung von steroidkonjugierten Proteinen gut geeignet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320128
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  • 37
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    Einfacher Feinnachweis von Schwefel in organischen Verbindungen (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 235-238 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird ein einfacher, sicherer und empfindlicher Mikronachweis von organisch gebundenem Schwefel beschrieben. Etwa 0,5 mg Substanz werden in einer Kapillare durch Erhitzen mit Kaliumcarbonat-Magnesium-Gemisch reduziert und der Schwefelwasserstoff durch Bleiacetat nachgewiesen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320133
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  • 38
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    Recherches sur la réduction électrolytique de la nitroguanidine en aminoguanidine et de la nitro-urée en semicarbazide; influence de la nature de la cathode (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 215-232 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Pour nos essais, nous nous sommes servis d'une cellule d'électrolyse agencée de façon à permettre l'agitation de l'électrolyte, la mesure du volume d'hydrogéne dégagé, de la température et la détermination du potentiel cathodique.
    Additional Material: 9 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320131
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  • 39
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    Über Steroide und Sexualhormone. 158. Mitteilung. Über die reduktive Aufspaltung von Steroid-epoxyden mit Lithiumaluminiumhydrid III. Vereinfachte Synthesen von Derivaten des 5-Oxy-koprostans (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 265-269 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Vereinfachte, von Cholestenon ausgehende Synthesen von 3β, 5-Dioxy-koprostan (VIII) und 3α, 5-Dioxy-koprostan (VII) werden beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320137
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  • 40
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    Über herzwirksame Glykoside und Aglykone der Samen von Coronilla glauca. 21. Mitteilung über Herzglykoside (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 293-315 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Coronilla glauca enthält ein kompliziertes Gemisch von Herzglykosiden, die sich aus verschiedenen Geninen und Glucose aufbauen. Bei der Einwirkung eines spezifischen Samenenzyms wird die Zucker-Aglykon-Bindung gelöst. Es ist unseres Wissens damit zum ersten Male ein spezifisches herzglykosidspaltendes Enzym, das sein Substrat bis zum Aglykon abbaut, bekannt geworden.
    Additional Material: 2 Tab.
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    URL: http://dx.doi.org/10.1002/hlca.19490320141
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  • 41
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    Über die Ester und Äther des synthetischen Vitamins A (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 489-505 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Einige reine Ester und Äther des Vitamins A wurden nach dem von uns früher beschriebenen Aufbauprinzip dargestellt. Die Schmelzpunkte der synthetischen Krystallisate stimmen mit den bekannten Schmelzpunkten der entsprechenden Vitamin-A-Präparate aus Leberölen überein. Die Wirksamkeit der Ester (Standard-β-Carotin) berechnet auf 1 g Vitamin-A-Alkohol betrug 3,3±0,6 Millionen i. E. Der Methyläther besitzt annähernd die gleiche und der Butyläther deutlich geringere Wirksamkeit. Der Phenyläther vom Smp. 90-91° ist wenig wirksam. Die molare Extinktion bei 325-328 mm̈ aller Präparate betrug ca. 50 000 und die molare Extinktion der Carr-Price-Messung gab ebenfalls gleiche Werte. Die molare Exaltation des Systems der konjugierten Doppelbindungen wurde übereinstimmend mit 16,5±0,6 bestimmt. Die Messung der Sauerstoffempfindlichkeit im Warburg-Apparat zeigt, dass die Ester beständiger sind als der Methyläther und der Vitamin-A-Alkohol. Die alkalische Hydrolyse der Ester verläuft erwartungsgemäss als Reaktion 2. Ordnung.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320218
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  • 42
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    Vielgliedrige heterocyclische Verbindungen. 12. Mitteilung. Polymethylen-imine (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 544-552 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Reduktion der Cyclanon-isoxime mit Lithiumaluminiumhydrid in Äther bzw. Tetrahydro-furan wurden die Polymethylenimine mit 7- bis 21-gliedrigem Ring hergestellt.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320224
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  • 43
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    Über die Isomerie von Lysergsäure und Isolysergsäure. 14. Mitteilung über Mutterkornalkaloide (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 506-521 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Aufhebung des Asymmetriezentrums am Kohlenstoffatom 8 durch β-Aminocarbonsäure-Spaltung ergibt ein identisches Lactam aus Lysergsäure und Isolysergsäure, was zur Formulierung dieser Isomeren als Diastereomere führt. Ihre hydrierbare Doppelbindung wird auf Grund des Vergleichs der Absorptionsspektren in Δ9-10 festgelegt. Der Hofmann'sche Abbau, die Decarboxylierung und die Hydrierung von Lysergsäure und Isolysergsäure werden in Übereinstimmung mit dieser Auffassung formuliert. Für den Mechanismus der reversiblen Lysergsäure-Isolysergsäure-Umlagerung wird eine Erklärung gegeben.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320219
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  • 44
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    Der Einfluss von Faktor V auf die Prothrombinbestimmung (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 717-722 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eine Verminderung von Gerinnungsfaktor V (Owren) kann bei Verwendung der Einphasenmethode nach Quick eine Reduktion des Prothrombins vortäuschen. Die erwähnte Bestimmungsmethode muss daher durch Zusatz von prothrombinfreiem, aber Faktor V-haltigem Plasma ergänzt werden. Die Angabe der Prothrombinkonzentration in Prozenten der Norm bedarf ebenfalls einer Revision unter Berücksichtigung der Wirkung von Faktor V. Die kritische Prothrombinkonzentration z. B., unterhalb welcher Spontanblutungen zu erwarten sind, liegt nicht, wie bisher angenommen, bei 20, sondern bei 5% Prothrombin.
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320314
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  • 45
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    Über Steroide. 85. Mitteilung. Beitrag zur Farbreaktion auf 17α-Oxy-steroide (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 761-769 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Erhitzen von Androstan-3, β, 17α-diol mit wasserfreier Ameisensäure führte zum krystallisierten, beständigen 3β-Formyloxy-ψ-androsten. Durch seine Ozonisation und weitere Umwandlung bis zum Chrysen konnte gezeigt werden, dass die Doppelbindung im ψ-Androsten sich zwischen den Kohlenstoffatomen 13 und 17 befindet.
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  • 46
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    Recherches sur I'amidon 44. Le glycogène de Zea maïs, variété «Golden bantam» (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 757-761 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Le glucosane de Zea maïs, variété «Golden bantam», a été étudié au point de vue constitution, poids moléculaire et dégradation β-amylatique. Il ne se distingue pas du glycogène animal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320318
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  • 47
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    Über die Landolt-Reaktion VI. Die photographischen Entwicklersubstanzen als Reduktionsmittel bei der Landolt-Reaktion (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 692-702 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Nach einem kurzen Überblick über die bisher angestellten Untersuchungen über die Landolt-Reaktion wird gezeigt, dass sich drei Typen dieses Vorganges unterscheiden lassen. Diese Aufteilung ergibt sich durch das Geschwindigkeitsverhältnis der drei simultanen Teilreaktionen (1) und (2) und (3). Der Umschlag erfolgt: bei Typ I, wenn das Reduktionsmittel total verbraucht ist (Totalreduktion); bei Typ II, wenn die Geschwindigkeit der Reaktionen (2) und (3) einander gleich werden (partielle Reduktion); bei Typ III, wenn [J'] die Empfindlichkeitsgrenze der Jodstärke-Reaktion erreicht, während Jod schon teilweise ausgeschieden ist (Jod-Vorlauf).
    Additional Material: 10 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320311
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  • 48
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    Zur Kenntnis der Folgetitration der Halogenide mit Silberion (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 723-734 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde die Folgetitration von 10-3-m. KJ+10-3-m. KBr+10-3-m. KCl mit 10-1-m. AgNO3 unter Verwendung einer genau arbeitenden automatischen Potentialregistrierung durchgeführt. Um hierbei den Einfluss des zeitlichen Verlaufes möglichst ungestört beobachten zu können, wurde das Silbernitrat mit Hilfe einer automatischen Vorrichtung kontinuierlich zugeführt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320315
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  • 49
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    Biologische Citrullinsynthese, Glutamin und α-Ureidoglutarsäure (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 744-756 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Wir haben die Synthese des Citrullins aus Ornithin durch die Mitochondrienfraktion der Leber (Ratte) bei Gegenwart von Glutamin untersucht. Bei Glutaminkonzentrationen von 20-30 μ Mol/cm3 ist das Amid mit oder ohne Zusatz von Ammoniumsalzen der Glutaminsäure plus Ammoniumsalz stark überlegen. Bei kleinen Konzentrationen, unter 3 μ Mol/cm3 liefert aber die Glutaminsäure unter allen Umständen mehr Citrullin als das Glutamin. Es ist also wenig wahrscheinlich, dass das Glutamin eine direkte Zwischenstufe der Synthese ist. Die Wirksamkeit des Amids lässt sich andererseits aber nicht einfach durch die Hydrolyse der Säureamidgruppe erklären. Dieselbe scheint eine spezifische Funktion zu haben. Das Glutamin steht offenbar zu einem Zwischenglied der Citrullinsynthese in enger Beziehung.
    Additional Material: 6 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320317
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    Üer den Aufbau im Kindesalter gebildeter Harnsteine (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 810-812 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassend ergibt unsere Untersuchung über im Kindesalter gebildete Harnsteine: 1Im Gegensatz zu den später entstehenden Harnkonkrementen, welche weit bevorzugt Harnsäuresteine darstellen, fehlen Harnsäurebildungen unter den im Kindesalter auftretenden Harnsteinen.2Weit vorherrschend sind vielmehr Struvitsteine wobei diese im Nierenbecken und in den Harnleitern multipel auftreten. In einem Fall hatte sich - offenbar zur Ausnahme ein solitärer Struvitstein in der Harnblase um einen Fremdkörper (Nadel) gebildet. Struvitkonkremente finden sich häufig bei alkalischem Urim mit Cysto-Pyelitis, Oxalat- und Harnsäuresteine dagegen zumeist bei saurem Urin. Struvitsteine können leicht rezidivieren.3Alle Nichtstruvitsteine, nämlich solche aus Csytin, Calciumoxalat-Monohydrat und -Dihydrat, waren Solitärsteine, ersterer in der Harnblase, letztere dagegen im Nierenbecken.
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    Komplexes XIII. Chelatkomplexe des Kobalts mit und ohne Fremdlinganden (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 839-853 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Die 4 Carboxylatgruppen des Anions Y-4 der Äthylendiamin-tetraessigsäure liegen in den Komplexionen [MY]z-4 im allgemeinen nicht alle im Zentralatom, so dass dieses noch eine Koordinationslücke aufweist, die einen Fremdliganden aufnehmen kann. Eine dieser Reaktionen, diejenige zwischen CoY-2 und CNS-, wurde mit Hilfe von Extinktionsmessungen untersucht, und es wurde gezeigt, wie man zur Kenntnis der Gleichgewichtskonstanten derartiger Reaktionen gelangen kann.
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    Synthèse de l'acide ptéroysulfo-L(+)-glutamique (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 877-880 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Nous avons effectué la synthèse de l'acide ptéroylsulfoglutamique, produit semblable à l'acide folique, dans lequel le noyau benzoylé est remplacé par un noyau benzosulfoné. Cette synthèse a été effectuée avec la réductone comme produit intermédiaire.
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    Die geometrischen Grundlagen der Auswahlregeln der Eigenschwingungen und Termaufspaltungen in Molekel- und Krystallverbindungen 2. Mitteilung (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 913-924 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Berücksichtigung aller genannten Regeln erhält man neben den Tabellen I bis III der einfachen Krystallklassen für Oh und Ih die bereits bekannten eindeutigen Charakterendarstellungen der Haupttabellen IV und V. Aus ihnen ergeben sich wiederum die Charakterendarstellungen der Untergruppen O, Th, Td, T bzw. I durch Kolonnenauswahl und Vereinigung der Zeilen mit gleichen zurückbleibenden Charakteren zu einem Typus. Damit ist in fünf Haupttabellen das gesamte Grundmaterial zur Gewinnung der symmetriebedingten Auswahlregeln zusammengefasst. Die nächste Aufgabe ist die der Berechnung der Freiheitsgrade, die in einer dritten Mitteilung erfolgt.
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    Isolierung von Thymin und Dimethylsulfon aus Equisettum palustre (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 957-960 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus den oberirdischen Organen des Sumpfschachtelhalms (Equisetum palustre) wurden Dimethylsulfon und Thymin isoliert. Für Dimethylsulfon ist dies das erste im Pflanzenreich festgestellte Vorkommen.
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    Verbesserte Isolierungsmethode der Desoxyribonucleoside (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 979-984 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden Vereinfachungen in der Isolierungsmethode der Desoxyribonucleoside aus den Produkten der fermentativen Hydrolyse von Thymonucleinsäure mit Kälberdarm-Nucleotidase beschrieben. Die physikalischen Konstanten der isolierten Nucleoside waren z. T. von den in der Literatur beschriebenen verschieden.
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    Komplexone XIV. Die Ultraviolettabsorption der Anilin- und Anthranilsäure-diessigsäure und ihrer Metallkomplexe (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1046-1052 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die Lösungsspektren von Anilin-diessigsäure, Anthranilsäure-diessigsäure, ihrer verschiedenen Ionisationsstufen sowie ihrer Erdalkali- und Zink-Komplexe angegeben. Die Spektren erlauben eine eindeutige Aussage über die Struktur der Säuren und ihrer Ionisationsstufen in wässriger Lösung. Bei der Anilin-diessigsäure liegt die Aminosäureform und bei der Anthranilsäure-diessigsäure die Betainform vor.
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    Über Steroide und Sexualhormone. 162. Mitteilung. Über die α-Oxyde des Allo-cholesterins und des Epi-allo-cholesterins (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1070-1074 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die α-Oxyde IIa und XIIIa des Allo-cholesterin-acetats und des Epi-allo-cholesterin-acetats werden beschrieben und der Beweis für die Konstitutionen dieser beiden Verbindungen erbracht. Die saure katalytische Hydrierung von Allo-cholesterin-β-oxyd (V) führte zu 3β, 4β-Dioxy-cholestan (VI), während die Reduktion desselben Oxyds V mit Lithiumaluminiumhydrid 3β,5-Dioxy-koprostan (III) liefert.
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    Recherches sur l'amidon 45. Sur le dosage des groupes terminaux de polysaccharides et d'oligosaccharides au moyen de periodate (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1102-1107 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Les différents facteurs influençant l'oxydation des oligosaccharides et polysaccharides par le periodate ont été étudiés. Il faut maintenir au cours de l'oxydation une température de 0° et un pH compris entre 4,2 et 5,8, pour éviter soit la saponification des esters formiques provenant des groupes réducteurs, soit la scission hydrolytique de polysaccharides oxydés.
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    La synthèse biologique de la glutamine (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1137-1143 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/hlca.19490320370
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    Etudes sur les matiéres végétales volatiles LXXXVII. Sur l'évaluation des γ-irones et de leurs dérivés par l'ozonolyse (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1151-1155 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: L'expérience a montré que, seules jusqu'à présent les techniques d'ozonolyse comportant la réduction de l'ozonide préparé en milieu sec conduisent, pour quelques produits possédant le groupement 〉 C = CH2 générateur d'aldéhyde formique, à des résultats analytiques à peu près satisfaisants. La technique de Doeuvre appartient à cette catégorie. Elle présente divers défauts opératoires et le présent travail a conduit à une micro-méthode exempte de plusieurs de ces défauts. Dans les conditions élaborées, les déterminations de la néo-γ-irone, de plusieurs de ses dérivés, et de l'acide dextro-pimarique, sont satisfaisantes.
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    Conferimento della medaglis Werder nell'anno 1949 (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1163-1163 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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    Welkstoffe und Antibiotika. 12 Mitteilung. Über die Konstitution des Patulins (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1166-1175 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das Patulin besitzt nicht die allgemein angenommene Struktur eines Oxymethylen-tetrahydrocomansäure-Lactons I, sein Skelett muss vielmehr demjenigen der Tetrahydro-γ-pyronyl-(3)-essigsäure (VIII) entsprechen, so dass die Formeln II oder (nach Woodward) III wahrscheinlich erscheinen.
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    Über Bestandteile der Nebennierenrinde und verwandte Stoffe 82. Mitteilung 17-Iso-allopregnan-triol-(3β, 17β, 20β) (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1306-1314 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reduktion von 20α, 21-Oxydo-17-iso-allopregnan-diol-(3β, 17 β)-monobenzoat-(3) mit Li[AlH4] gab das bekannte 17-Iso-allopregnan-triol-(3β, 17 β, 20α). Durch Hydrierung von 20β, 21-Oxydo-17-iso-allopregnan-diol-(3β, 17β)-monoacetat-(3) mit Li[AlH4] wurde das unbekannte 17-Iso-allopregnan-triol-(3β, 17β, 20β) hergestellt; dieses wurde durch sein Diacetat charakterisiert und seine Konstitution wurde durch Abbau zu Androstanol-(3β)-on-(17) bewiesen. Der bisher als dieses Triol bezeichnete Stoff erwies sich als Gemisch von zwei bekannten Verbindungen. Die früher festgelegte Konfiguration der 17-Iso-allopregnan-tetrole-(3β, 17β, 20,21) wurde durch diese Reaktionen erneut bestätigt.
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    Untersuchungen über dei freien aminosäuren in der Leber bei verschiedener Ernährung. II. Glykolkoll und Serin (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1341-1344 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Konzentration von freiem Glykokoll und Serin in der Rattenleber lässt sich durch die Ernährung beeinflussen. Der Glykokollgehalt ist bei der Eiweissfütterung gering, während Kohlehydrat-und Fettkost ihn erheblich ansteigen lassen. Das Serin ist nur bei fettreicher Ernährung stark erhöht. Den tiefsten Stand erreicht es bei Eiweissfütterung; bei Kohlehydratfutter und im Hunger wurden mittlere Werte gefunden.
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    Untersuchungen über die freien Aminosäuren in der Leber bei verschiedener Ernährung. III. Valin, Leuein, Isoleucin, Methionin, Phenylalanin, Histidin, Arginin, Lysin, Tryptophan, Threonin, Cystin, Tyrosin, Prolin und Oxyprolin (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1344-1351 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus Tabelle 1 geht hervor, dass verschiedene Ernährung keinen deutlichen Einfluss auf die Gesamtkonzentration der freien Amino-säuren der Leber ausübt.
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    Errata (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1360-1360 
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    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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    Untersuchungen über Corynanthein (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1390-1402 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das Alkaloid Corynathein wurde durch Abbau mit Selen in eine Base C19H22N2, das Corynanthyrin, übergeführt. Durch Abbau letzterer Verbindung mit Ozon entstand ein Ozonid C19H22O3N2, das bei der Hydrolyse in ein Keton C19H22O2N2 überging. Letzteres liess sich hydrolytisch zu o-Aminopropiophenon und 3,4-Diäthylpyridin-6-carbonsäure aufspalten. Aus diesen Spaltstücken ergab sich die Konstitutionsformel des Corynanthyrins, die mit jener des Tetrabyrins nahe verwandt ist.
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    Über die Hydrierung des Succinyl-dimalonesters. 13. Mitteilung über ketone, Ketonsäuren und Enol-lactone (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1433-1438 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die katalytische Hydrierung des Succinyldimalonesters wird beschrieben; sie verläuft nicht einheitlich und erweist sich nicht als geeigneter Weg, um zur Tetrahydrofuran-2,5-diessigsäure zu gelangen.
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    Progesteron- und Desoxycortiosteron-Derivate aus Periplogenin. Über Bestandteile der Nebennierenrinde und verwandte Stoffe. 83. Mitteilung (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1517-1529 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Periplogenin wird in 3β,5,14,21-Tetroxy-14-iso-pregnanon-(20) übergeführt. Ausgehend von diesem Tetrol sowie dem bereits beschriebenen 3-Monoacetat wird eine Reihe von Pregnanderivaten bereitet, unter anderem Progesteron, Desoxycorticosteron-acetat, 14-Oxy-14-iso-11-desoxy-corticosteron-acetat. Der letztgenannte Stoff wurde in kleiner Ausbeute bereits früher aus Digitoxigenin bereitet. Er ist mit Corticosteron isomer, erwies sich aber im Everse-de-Fremery-Test als unwirksam.
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    Sur I'ozonation du stilbène, du dinitro-4, 4′-stilbène et du diacétylamino-4, 4′-stilbène (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1505-1512 
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    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Le stilbène et deux de ses dérivés ont été soumis, à l'état dissous, à l'ozonation selon la méthode quantitative utilisée dans ce laboratoire.
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    Die Hammett'sche Säurefunktion des Systems Phosphorsäure/Wasser (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1513-1517 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Hammett'sche Säurefunktion H0 wurde für das System Phosphorsäure/Wasser innerhalb eines Konzentrationsbereiches von 0-85% (Gewichtsprozent) Phosphorsäure bestimmt.
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    Über herzaktive Krötengifte (Bufogenine) 4. Mitteilung. Konstitution des gamabufotalins (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1599-1607 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die durch Abbau von Gamabufotalin-diacetat mit KMnO4 erhaltene Säure konnte eindeutig als 3β, 11α-Diacetoxy-14-oxy-14-iso-ätiocholansäure identifiziert werden. Damit ist die Konstitution und Konfiguration des Gamabufotalins bewiesen. Bei der oben genannten Oxydation entsteht ein krystallisiertes neutrales Nebenprodukt, dem die Konstitution des 3β,11α-Diacetoxy-14-oxy-14-iso-20-keto-pregnan-21-säure-Lactons-(21→14) zukommt.
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    Synthese der optisch aktiven β-Methoxy-adipinsäure. Steroide, 2. Mitteilung (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1613-1617 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: DL-β-Methoxy-adipinsäure wurde mit Strychnin in die beiden optisch aktiven Antipoden gespalten. Sie zeigten in Chloroform eine spez. Drehung von [α]D18 = + 13,1° bzw. -14,5°. Zur Charakterisierung ist das Dianilid brauchbar.
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    Zur Kenntnis der Triterpene. 142. Mitteilung. Über die Isolierung eines unbekannten, tetracyclischen Alkohols C30H50O aus „shea-nut“-Öl (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1626-1632 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus den unverseifbaren Anteilen des „shea-nut“-öls wurde ein tetracyclischer, zweifach ungesättigter Triterpenalkohol C30H50O (II) isoliert, der eine reaktionsfähige, in einer Isopropylidengruppe liegende, und eine reaktionsträge, vollständig substituierte Doppelbindung besitzt. Durch Entfernen der Hydroxylgruppe und der hydrierbaren Doppelbindung von II wurde ein bisher unbekannter, tetracyclischer Kohlenwasserstoff C30H52 (IX) gewonnen. Der Alkohol II ist mit dem von I. Heilbron, E. R. H. Jones und P. A. Robins unlängst beschriebenen Butyrospermol identisch.
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    Über Doppelhydroxyde und basische Doppelsalze. Über basische Doppelchloride des Kupfers (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1653-1667 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Bei der Umsetzung von Kupferoxyd bzw. Kupfer und Sauerstoff mit den Lösungen der Chloride von Nickel, Kobalt, Magnesium, Zink und Cadmium entstehen basische Doppelchloride der ungefähren stöchiometrischen Zusammensetzung 3 Cu(OH)2, MeCl2. Sie sind isomorph mit dem Kupferhydroxychlorid IIγ. Daraus folgt, dass sie nicht singulären Verbindungen entsprechen, sondern Glieder einer kontinuierlichen Mischkrystallreihe sind, d. h. dass im Kupferhydroxychlorid die Kupfer- durch andere Metallionen ersetzt werden können. Die einfach stöchiometrische Zusammensetzung ist auf die besonderen, bei der Herstellung herrschenden Verhältnisse zurückzuführen.
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    Reduktion von Cumarin und von o-Cumsarsäureester mit Lithiumaluminiumhydrid (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1692-1693 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Reduktion von Cumarin mit LiAlH4 entstand cis-o-Oxyzimtalkohol, durch Reduktion von o-Cumarsäure-äthylester 3-o-Oxyphenyl-propanol-(1).
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    Krystallisiertes Methylpteridinrot (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1689-1692 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Reindarstellung des Methylpteridinrotes beschrieben, welches durch Einwirkung verdünnter Schwefelsäure auf 2-Amino-6-oxy-8-methylpteridin entsteht.
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    Masthead (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949) 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320601
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    Zur Kenntnis der Erythrophleum-Alkaloide. 11. Mitteilung. Zur Lage der Carboxyl-Gruppe in der Cassansäure (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1713-1722 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Durch Vergleich des Spektrums des Dehydrierungskohlenwasserstoffs C20H22 aus „Isopropyl-nor-cassen“ mit jenen einiger Alkyl-phenanthrene, konnte geschlossen werden, dass ein trisubstituiertes Phenanthren, möglicherweise ein 1,2,8-Trialkyl-phenanthren vorliegt.
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    Interne Valenzkoordinaten organischer Molekeln (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1784-1795 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: E. B. Wilson hat ein vereinfachtes Verfahren zur Berechnung der Normalschwingungen beliebiger Molekeln angegeben. In der vorliegenden Arbeit wurden für anschauliche innere Valenzkoordinaten die Elemente berechnet, die für einfache Molekelformen innerhalb dieses Verfahrens benötigt werden.
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    Etudes sur les matières végétales volatiles XCI. Sur les conversion du méthyl-3-linalol en méthyl-3-citrals et des nérolidols en farnésals (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1798-1802 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: La conversion du méthyl-3-linalol en méthyl-3-citrals au moyen du réactif chromique peut être effectuée de plusieurs manières, également satisfaisantes à l'échelle du laboratoire, celle des nérolidols en farnésals également. On obtient principalement, à partir du nérolidol extrait de l'essence de cabreuva, et après purification par l'intermédiaire de la combinaison hydrogénosulfitique, un des farnésals isomères, défini par plusieurs dérivés cristallisés et par dégradation en la géranylacétone dont la semicarbazone F. 96-96,5° et la dinitro-2,4-phénylhydrazone F. 72-73°.
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    Bei der Redaktion eingelaufene Bücher: (Die Redaktion verpflichtet sich nicht zur Besprechung der eingesandten Werke) (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1815-1816 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320558
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    Aufruf für Bewerber um ein Stipendium aus der „Van 't Hoff-Stiftung“ zur Unterstützung von Forschern auf dem Gebiete der reinen oder angewandten Chemie (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1817-1818 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320560
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    Die Messung von Natriumamalgam-Potentialen mit Glaselektroden (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1940-1947 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mit Hilfe von Reagensgläsern aus Thüringer Glas, welche als Glaselektroden dienten, wurden unter Verwendung eines elektrostatischen Elektrometers als Nullinstrument eines Kompensationsgerätes Potentialmessungen an Natriumamalgamen gegen gesättigte NaCl-Lösung durchgeführt. Die Messungen erstreckten sich über einen Konzentrationsbereich von 0,6% bis 0,0005%.
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    15-Äthylaxerophten (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1938-1940 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Synthese des 15-Äthylaxerophtens, ausgehend vom C18-Keton, wird beschrieben.
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    Sulla contituzione dei prodotti di condensazione del cloralio con etossalil-chetoni (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 1967-1974 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Kondensation von Äthoxalylketonen bzw. ihrer Natriumenolate mit Chloral entstehen αKeto-β-acyl-γ-trichlormethyl-γ-lactone. Die Konstitution dieser Substanzen ergibt sich auf Grund ihrer Eigenschaften, welche denjenigen einer Reihe früher von uns aus den entsprechenden Äthoxalylverbindungen und Fettaldehyden dargestellter α-Keto-γ-lactone analog sind.
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    Die Konfiguration der optisch aktiven β-Metoxy-adipinsäuren und des Calciferols. Vorläufige Mitteilung. Steroide. 4. Mitteilung (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2003-2009 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ein Vorversuch zur Synthese optisch aktiver β-Methoxy-adipinsäure aus L-Äpfelsäure lieferte unreine rechtsdrehende Säure, die als Dianilid isoliert werden konnte. Dieses Resultat spricht dafür, dass die bisherigen Raumformeln in der Sterinreihe nicht mit der gebräuchlichen Fischer'schen Definition der Zucker-Reihe Übereinstimmen.
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    Ein neues Provitamin D: das Δ5,7-Norcholestadien-3 β-ol (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2038-2044 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Viene descritta la sintesi di una nuova provitamina D, il Δ5,7-Norcolestadien-3 β-ol, a partire da una sterina con catena laterale rettilinea e satura. È stato pure isolato e caratterizzato un isomero della nuova provitamina, il Δ4,6-Norcolestadien-3 β-olo presente nelle acque madri.
    Additional Material: 2 Ill.
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    Zur Kenntnis der Sesquiterpene und Azulene. 87. Mitteilung. Synthese des Guaj-azulens I (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2137-2144 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Herstellung von 1,4-Dimethyl-6-isopropyl-indan (XI) aus m-Cymol wird beschrieben. Nach der Diazoessigester-Methode wird daraus ein Azulen-Gemisch erhalten, in welchem Guaj-azulen (XII) nur in kleiner Menge vorhanden ist.
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    Études sur les matières végétales volatiles XCIII. Sur les constituants cétoniques secondaires de l'huile essentielle d'iris (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2171-2173 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: La fraction cétonique de l'huile essentielle d'iris, isolée au moyen du réactif P de Girard et Sandulesco (chlorure d'acétohydrazide-pyridinium) renferme, outre les irones, de l'acétophénone, une cétone α-éthénique C10H16O, de l'acétovératrone (diméthoxy-3,4-acétophénone) et une hydroxycétone C14H24O2 α-éthénique, qui pourrait être une hydroxy-dihydro-irone.
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    Veilchenriechstoffe. 34. Mitteilung. Über das Mengenverhältnis von γ- und α-Iron im Irisöl (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2198-2204 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurde gezeigt, dass sich mit Hilfe gewisser Infrarot-Frequenzen der Gehalt des natürlichen Irons an der γ-Form recht genau ausrechnen lässt. Dieser Methode kommt eine allgemeine Bedeutung zu in allen ähnlichen Fällen, wo wenigstens eine Komponente eines zu analysierenden Gemisches in reiner Form bekannt ist.
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    Bei der Redaktion eingelaufene Bücher: (Die Redaktion verpflichtet sich nicht zur Besprechung der eingesandten Werke.) (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2208-2208 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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    Über die Alkaloide des Buchsbaums, Buxus sempervirens L. 2. Mitteilung. Über die Struktur des Alkaloids A (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2226-2240 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das aus den Blättern von Buxus sempervirens L. isolierte Alkaloid A von der Zusammensetzung C25H42ON2 enthält als funktionelle Gruppen zwei NHCH3-Gruppierungen und eine alkoholische Hydroxylgruppe.
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    Zur Kenntnis des β-Zinkhydroxyds (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2294-2298 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus röntgenographischen und morphologischen Untersuchungen ergibt sich, dass die verschiedenen Formen von β-Zinkhydroxyd zwei besonderen Modifikationen, β1 und β2, zuzuordnen sind, β1 bildet sich in neutralem, β2 in schwach alkalischen Milieu. Beide Modifikationen besitzen ein Schichtengitter mit gleichem Schichtenabstand.
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    Über Cyclopentan-1,3-dione und isomere Enol-lactone. 2. Mitteilung. Butanoliden-γ-essigester (5-Oxo-tetrahydrofuryliden-(2)-essigester) (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2318-2327 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1. Der Butanoliden-γ-essigsäuremethylester (5-Oxo-tetrahydrofuryliden-(2)-essigester) und der entsprechende Äthylester werden synthetisiert. Ihre Konstitution wird besonders durch die Hydrierung, die Oxydation, die Hydrolyse und die Farbreaktionen bewiesen. Da der Äthylester mit der von A. Beckera als solcher betrachteten Substanz nicht identisch ist, muss letzterer eine andere Struktur zukommen.
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    Sur les dérivés de la fluorénone III. Dérivés de la méthyl-3, de la méthyl-1 et de la diméthyl-1, 6- fluorénone (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2340-2348 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On indique deux chemins nouveaux pour une préparation plus rentable de la méthyl-3-nitro-2-fluorénone. On prouve que le dérivé trinitré obtenu par nitration de la méthyl-3-fluorénone est la méthyl-3-trinitro-2,4,7-fluorénone. On décrit la synthèse, par des méthodes classiques, des produits suivants: méthyl-1, méthyl-1-nitro-4, méthyl-1-dinitro-2,4 et diméthyl-1,6-nitro-4-fluorénone.
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    Über Curarewirkung einiger Strychnidin- und Dihydrostrychnidin-chlor-alkylate (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2381-2385 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus dem durch Reduktion von Strychnin mittels LiAlH4 erhaltenen Strychnidin wurden das Chlormethylat, Chloräthylat, Chlor-n-propylat, Chlor-n-butylat und Chlorbenzylat dargestellt und auf ihre Curare-Wirkung geprüft. Mehrere dieser Verbindungen erwiesen sich als sehr stark Curare-wirksam. Vergleichsweise wurde auch die Curare-Wirkung von Dihydrostrychnidin-A-chlormethylat, Dihydrostrychnidin-A-chlor-benzylat, Strychnin-chlormethylat und Strychninchlor-benzylat untersucht.
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    Recherches sur les alcaloïdes d'Erythrophleum. 12e communication. Cassamine et érythrophlamine; fractionnement des alcaloïdes totaux d'Erythrophleum guineense (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2364-2381 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Le fractionnement des bases extraites d'un lot d'écorces d'Erythrophleum guineense provenant de Yangambi (province de Stanleyville) a permis d'isoler plusieurs alcaloïdes cristallisés, la cassaïne et la cassaïdine déjà connues et deux autres bases que nous avons appelées cassamine (C25H39O5N; F. 86-87°; [α]D = -56°) et érythrophlamine (C25H39O6N; F.149-151° [α]D = -62,5°).
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    Über Flammen. II. Brennt Kohlensuboxyd in trockener Luft? (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 2400-2415 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Im Hinblick auf die Tatsache, dass eine Kohlenoxydflamme in trockener Luft erlischt, wurde die Verbrennung von Kohlensuboxyd in trockener und feuchter Luft untersucht: 1Kohlensuboxyd brennt im Gegensatz zu Kohlenoxyd in trockener Luft weiter, wobei die Flamme jedoch ihre Struktur von Grund aus ändert. Während Kohlensuboxyd in feuchter Luft trübgelb mit einem dünnen blauen Saum brennt und stark zum Russen neigt, auch Russ an der Brennermüdung abscheidet, bildet sich in trockener Luft eine nicht russende, von der Mündung einige Millimeter abgehobene Flamme mit kleinem, weissglühendem Kegel an der Basis und grossem blauem Mantel.2Durch Luftzusatz entleuchtete Kohlensuboxydflammen erlöschen sofort in trockener Luft. Kohlenoxydflammen brauchen zum Weiterbrennen einen um so stärkeren Zusatz von Kohlensuboxyd je trockener die Verbrennungsluft ist.3In der trockenen Kohlensuboxydflamme stellt sich weitgehend das Boudouard'sche Gleichgewicht ein, durch das Kohlenoxyd gebildet wird. Dieses entweicht aus dem weissglühenden Kegel und verbrennt im äusseren Mantel der Flamme. Durch verschiedene Versuche wird die schon früher von Smithells behauptete Tatsache erhärtet, dass vorerhitztes Kohlenoxydgas in trockener Luft nicht erlischt, sondern weiterbrennt.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320725
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    Electronic Resource
    Electronic Resource
    Über den Mechanismus der Wasserabspaltung bei 1,3-Glykolen (1949)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 32 (1949), S. 134-135 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19490320120
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