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142
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50
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48
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38
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36
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34
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Texas Parks & Wildlife News, March 12, 1980
Weekly newsletter discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.
Date:
March 12, 1980
Creator:
Texas. Parks and Wildlife Department.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Neutron and Gamma-Ray Attenuation for a Fission Source in Water : Comparison of Theory with LTSF Measurements
Calculations are presented of the fast neutron dose rate, the gamma-ray dose rate, and the thermal neutron flux along the source plate axis in the Lid Tank with the tank filled entirely with water. These calculations are compared with experimental measurements. The calculations are absolute and are compared with absolute measurements.
Date:
March 12, 1957
Creator:
Otis, David Ridgway
Object Type:
Report
System:
The UNT Digital Library
DSRIP Update, March 2021
Periodic newsletter providing updates and progress on the transition plan for the Texas DSRIP (Delivery System Reform Incentive Payment), to support partner engagement.
Date:
March 12, 2021
Creator:
Texas Health and Human Services Commission
Object Type:
Report
System:
The Portal to Texas History
Annual Report of the Boy Scouts of America: 1957
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1957, activities, organizational leadership, and other information about scouting programs.
Date:
March 12, 1958
Creator:
Boy Scouts of America
Object Type:
Report
System:
The Portal to Texas History
Aircraft Nuclear Propulsion Project Quarterly Progress Report for Period Ending December 10, 1955
This quarterly progress report of the Aircraft Nuclear Propulsion Project at ORNL records the technical progress of the research on circulating-fuel reactors and other ANP research at the Laboratory under its Contract W-7405-eng-26. The report is divided into three major parts: I. Reactor Theory, Component Development, and Construction, II. Materials Research, and III. Shielding Research. The ANP Project is comprised of about 530 technical and scientific personnel engaged in many phases of research directed forward the achievement of nuclear propulsion of aircraft. A considerable portion of this research is performed in support of the work of other organizations participating in the national ANP effort. However, the bulk of the ANP research at ORNL is directed toward the development of a circulating-fuel type of reactor. The design, construction, and operation of the Aircraft Reactor Test (ART), with the cooperation of the Pratt & Whitney Aircraft Division, are the specific objectives of the project. The ART is to be a power plant system that will include a 60-Mv circulating-fuel reflector-moderated reactor and adequate means for heat disposal. Operation of the system will be for the purpose of determining the feasibility, and the problems associated with the design, construction, and operation, of a …
Date:
March 12, 1956
Creator:
Jordan, W. H.; Cremer, S. J.; Miller, A. J. & Savelainen, A. W.
Object Type:
Report
System:
The UNT Digital Library
Ytterbium and Terbium Dodecaborides
The synthesis of several rare earth dodecaborides, isomorphous with UB12 and ZrB12, and crystallographic data for these phases were reported recently. The unit cells are face centered cubic with four formula weights of MeB12 per unit cell; the structures may be visualized in terms of boron atoms linked in a rigid three-dimensional network, with the metal atoms in large cubo-octahedral holes.
Date:
March 12, 1963
Creator:
La Placa, Sam & Noonan, Daniel
Object Type:
Report
System:
The UNT Digital Library
Linkage in Autotetraploids and Allotetraploids of Zea
Studies of linkage in polyploids have been exceedingly rare. Only three previous studies of linkage in autotetraploid maize have been reported. Murray (1944), in a limited analysis of crossing over among 4 linked markers in chromosome 2, found varying degree of difference in linkage values between 2n and 4n maize in the three interposed segments. Dempsey (1956) found linkage values wx - c region of chromosome 9 to correspond closely between autotetraploid and diploid maize. More recently Welch (1962), in a more extensive analysis of linkage among the same group of chromosome 2 markers studied earlier by Murray, concluded that although individual progenies varied, linkage values in diploid and tetraploid maize, with some exceptions, are similar. Limited data from one segment of the allotetraploid of perennial teosinte x maize (Emerson and Beadle 1932) probably represent the only reported linkage tabulation in this type of polyploid. A further study of linkage of Zea polyploids seemed worthwhile because of the increasing practical importance of polyploids, of the possibility of adding to fundamental knowledge of tetraploid cytology and genetics, and of the bearing such work may have upon the question of the taxonomic affinities of maize.
Date:
March 12, 1963
Creator:
Shaver, Donald L.
Object Type:
Report
System:
The UNT Digital Library
Cell Population Kinetics of an Osteogenetic Tissue, II
A study of the cell kinetics on the actively growing periosteal surface of the femur of rabbits ages two weeks has been continues. A single injection of tritiated thymidine was given and the rabbits killed from one hour to four days after injection. The grain count spectra of the different cell types, pre-osteoblast, osteoblast and osteocyte, have been compared at different times after injection. The results showed evidence for the uptake of thymidine in nuclei which is not associated with cell division. A small percentage of osteoblasts was initially labelled at one hour and there was evidence that the majority of these had not divided by 3 or 4 days after injection. Some thymidine labelled cells had also become osteocytes without division. Furthermore, it appeared that a considerable fraction of the initially labelled pre-osteoblasts did not divide. The S-period for the pre-osteoblasts and osteoblasts was measured using a double-labelled thymidine technique.
Date:
March 12, 1963
Creator:
Owen, Maureen & Pherson, Sheila Mac
Object Type:
Report
System:
The UNT Digital Library
Four Short Articles on Genetics of Maize
Studies carried on since 1956 indicate that the prosaic breeding procedure of sibbing among the most perennial segregates in the hybrid of 4n maize x 4n perennial teosinte quickly restores perennialism to 50% maize tetraploids through increasing the expression of the rhizomatous habit under selection pressure. Similarly, only two generations of selection at the 75% maize level have resulted in a progressive recovery of the perennial expressive. A high degree of maize-likeness therefore appears to be compatible with the perennial expression at the 4n level.
Date:
March 12, 1963
Creator:
Brookhaven National Laboratory
Object Type:
Report
System:
The UNT Digital Library
Cell Population Kinetics of an Osteogenetic Tissue, I
Cell proliferation on the actively growing periosteal surface of the femur of rabbits aged two weeks, has been investigated using autoradiographic techniques. Injections of tritiated glycine and tritiated thymidine were given simultaneously and the animals sacrificed at intervals from one hour to 5 days after injection. The glycine labelled the position of the bone surface at the time of injection and the thymidine labelled the cells which were synthesizing DNA . The rate of increase in the cell population was determined by counting the number of cells beyond the glycine label at different times after injection. The cell kinetics of the fibroblast--pre-osteoblast--osteoblast--osteocyte system has been studied. The fibroblasts are relatively unimportant from the point of view of increase in the cell population. The main site of cell proliferation is the layer of preosteoblasts on the periosteal surface. The rate of movement of cells from the pre-osteoblast to the osteoblast and osteocyte compartments has been measured. The incorporation of osteoblasts into the bone is not a random process, but it appears that the osteoblast must spend a certain time on the periosteal surface before becoming either an osteocyte or a relatively inactive osteoblast lining a haversian canal. During its most active …
Date:
March 12, 1963
Creator:
Maureen, Owen
Object Type:
Report
System:
The UNT Digital Library
Mathematics of Intermittent Irradiation
Initiation of reactions by intermittent irradiation is frequently encountered in physical, chemical, and biological systems. Mathematical expressions for transient and steady state concentrations of reactive species in these systems are useful for predicting performance and for research purposes. A general method of formulation of the intermittent irradiation problem is presented herein, and illustrative solutions are obtained for radioactive decay chains and for the rotating sector method.
Date:
March 12, 1963
Creator:
Hill, F. B.
Object Type:
Report
System:
The UNT Digital Library
Adaptation of a Commercial Counter X-Ray Diffractometer for Investigations to 3000°C
The rapid advances in many technologically important areas have not only served to accentuate the increased demands for high temperature metals and ceramics but have necessitated a more through knowledge of their physical properties when exposed to high temperature service. Toward this latter end, the use of X-ray diffraction has proved an invaluable tool in providing data of regions of thermal stability, expansion coefficients, solid solubility limits, and phase transformations by direct examination at temperature. Since this Laboratory has for some time now been engaged in the study of refractory nuclear materials, it was thought desirable to employ and possibly extend this technique to temperatures ranging up to 3000°C. This communication will describe the equipment developed for this purpose, with experimental results to be described in subsequent publications.
Date:
March 12, 1963
Creator:
LaPalca, Samuel; Farber, Gerald & Adler, George
Object Type:
Report
System:
The UNT Digital Library
Study of Low Frequency Molecular Motions in HF, KHF2, KH2F3 and NaH2F3
The spectra of KHF2, KH2F3, NaH2F3, liquid and solid HF were measured between 1200 and 30 cm-1 by the inelastic scattering of "cold neutrons" (0.005e.v.). The spectrum of KHF2 is in agreement with previous infrared measurements and shows a peak at 147 mV corresponding to a deformation frequency v2 of the F-H-F group and a broad peak at 13 mV due to a libration of this group. The observed spectra for KH2F3, NaH2F3 solid and liquid HF were compared with that for KHF2 considering the known results that the F-F distance increases, the position of the H atom between the two fluorines becomes more asymmetrical, and the strength of the hydrogen bond decreases in going from the HF2- ion to H2F3- ion to HF. In this comparison the known structure of the H2F3- ion is considered as being intermediate between that of HF2- and the zig-zag hydrogen bonded chains in solid HF. As a result, the lines observed at 112 mV and 67 mV in the H2F3- spectra and in HF respectively are associated with the deformation frequency v2 of the H-F-H group in these compounds. In addition the spectra of H2F3- ions show a peak at a 15 mV …
Date:
March 12, 1963
Creator:
Boutin, Henri & Safford, G. J.
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 46, Number 11, Pages 1561-1704, March 12, 2021
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
March 12, 2021
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Chimney-Cowl
Patent for low cost chimney cowl improvements to insure proper draft and prevent fires.
Date:
March 12, 1918
Creator:
Burch, Robert S.
Object Type:
Patent
System:
The Portal to Texas History
Baling-Press.
Patent for an improved bailing press "especially designed for forming hay, straw, cotton, &c., &c.... into compressed, compact bales" (lines 10-13) that requires less effort and power for stronger compression results.
Date:
March 12, 1910
Creator:
North, Clarence L.
Object Type:
Patent
System:
The Portal to Texas History
Attachment for Carbureters
This patent is for improvements in attachments for carbureters for automobiles. The purpose of this invention is to provide a means whereby only hot air or vapor is sucked into the carbureter,
Date:
March 12, 1918
Creator:
Milligan, Albert L.
Object Type:
Patent
System:
The Portal to Texas History
Vacuum-Regulator for Oil-Pumps.
Patent for vacuum regulator for oil pump. This device is simply constructed and easy to operate. It is an automatic cut-off in the vacuum of the pipe line to the pump.
Date:
March 12, 1918
Creator:
Hobb, James W.
Object Type:
Patent
System:
The Portal to Texas History
Portable Support
Patent for a portable support. This support improves previous portable support structures specifically based around transporting barrels or other cylindrical objects through rockers, pivoted legs, and supporting frames in order to increase movement and allow the frame to be tilted in alternate positions.
Date:
March 12, 1918
Creator:
Morgan, Doctor F.
Object Type:
Patent
System:
The Portal to Texas History
Tag for Keys and Other Articles.
Patent for a tag that can be attached to keys for hotel rooms and similar uses. The tag could include the room number associated with the key, the hotel address, and a space for inserting advertising cards.
Date:
March 12, 1918
Creator:
Hartman, William D.
Object Type:
Patent
System:
The Portal to Texas History
Protector for Type-Writer Frames.
Patent for typewriter frame protector. The protector attaches to the part of the typewriter frame which is subjected to frequent contact by the user. The protector prevents the frame from wear which can lead to rust.
Date:
March 12, 1918
Creator:
Glasscock, Gerald A.
Object Type:
Patent
System:
The Portal to Texas History
Fly Catcher
Patent for the fly catcher. This invention comprehends the provision of a fly trap embodying a chute through which livestock may pass and have flies that circulate around them being scared or brushed off of them and causing them to enter a trap. Illustrations are provided.
Date:
March 12, 1918
Creator:
Girvin, Fitzhugh B. & Brady, Charles P.
Object Type:
Patent
System:
The Portal to Texas History
Float-Valve.
Patent for a float valve that is easy and inexpensive to manufactured. It may be used in all tanks.
Date:
March 12, 1918
Creator:
Lakios, George John
Object Type:
Patent
System:
The Portal to Texas History
Draft Attachment for Automobiles.
Patent for a draft attachment for automobiles to aid in their movement from muddy or slippery conditions including instructions and illustrations.
Date:
March 12, 1918
Creator:
Pietzsch, Cornelius O.
Object Type:
Patent
System:
The Portal to Texas History