Cross-Section Parameterizations for Pion and Nucleon Production From Negative Pion-Proton (2002)
Ranft has provided parameterizations of Lorentz invariant di#erential cross sections for pion and nucleon production in pion-proton collisions that are compared to some recent data. The Ranft...
Cross-Section Parameterizations for Pion and Nucleon Production From Negative Pion-Proton (2002)
Ranft has provided parameterizations of Lorentz invariant di#erential cross sections for pion and nucleon production in pion-proton collisions that are compared to some recent data. The Ranft...
Deep Space Design Environments For Human (2002)
M. S. Clowdsley, F. A. Cucinotta, R. K. Tripathi, J. E. Nealy, G. De Angelis
Mission scenarios outside the Earth's protective magnetic shield are being studied. Included are high usage assets in the near-Earth environment for casual trips, for research, and for...
A Generalized Weizscker-Williams Method (2002)
AnewGeneralized Weizsacker-Williams Method (GWWM) is used to calculate approximate cross sections for relativistic peripheral proton-proton collisions.
A Generalized Weizscker-Williams Method (2002)
A new Generalized Weizsacker-Williams Method (GWWM) is used to calculate approximate cross sections for relativistic peripheral proton-proton collisions.
String Fragmentation Model in Space (2002)
This paper is dedicated to the memory of Eloise Johnson, a superb technical editor who will be missed by her colleagues and researchers alike. She went to her eternal abode during the process of...
String Fragmentation Model in Space (2002)
Alfred Tang, John W. Norbury, R. K. Tripathi
This paper is dedicated to the memory of Eloise Johnson, a superb technical editor who will be missed by her colleagues and researchers alike. She went to her eternal abode during the process of...
Recently [20,21], we developed a method of extracting nucleon-nucleon (N-N) cross sections in the medium directly from experiment. The in-medium N-N cross sections form the basic ingredients of...
Proton-Nucleus Elastic Cross Sections Using Two-Body In-Medium Scattering Amplitudes (2001)
R. K. Tripathi, John W. Wilson, Francis A. Cucinotta
Recently, a method was developed of extracting nucleon-nucleon (NN) cross sections in the medium directly from experiment. The inmedium NN cross sections form the basic ingredients of several...
Importance Of Nuclear Physics To Nasa's Space Missions (2001)
R. K. Tripathi, F. A. Cucinotta
. We show that nuclear physics is extremely important for accurate risk assessments for space missions. Due to paucity of experimental input radiation interaction information it is imperative to...
Deep Space Mission Radiation Shielding Optimization (2001)
R. K. Tripathi, J. W. Wilson, F. A. Cucinotta, J. E. Nealy, M. S. Clowdsley, M. -h. Y. Kim
Providing protection against the hazards of space radiation is a major challenge to the exploration and development of space. The great cost of added radiation shielding is a potential limiting...
Parameterized Cross Sections for Pion Production in Proton-Proton Collisions (2000)
Steve R. Blattnig, Sudha R. Swaminathan, Adam T. Kruger, Moussa Ngom, John W. Norbury, R. K. Tripathi
An accurate knowledge of cross sections for pion production in proton-proton collisions finds wide application in particle physics, astrophysics, cosmic ray physics, and space radiation problems,...
Parameterized Cross Sections for Pion Production in Proton-Proton Collisions (2000)
Steve R. Blattnig, Sudha R. Swaminathan, Adam T. Kruger, Moussa Ngom, John W. Norbury, R. K. Tripathi
An accurate knowledge of cross sections for pion production in proton-proton collisions finds wide application in particle physics, astrophysics, cosmic ray physics, and space radiation problems,...
Proton-Nucleus Total Cross Sections in Coupled-Channel Approach (2000)
R. K. Tripathi, John W. Wilson, Francis A. Cucinotta
Recently, nucleon-nucleon (N-N) cross sections in the medium have been extracted directly from experiment. The in-medium N-N cross sections form the basic ingredients of several heavy-ion scattering...
Proton-Nucleus Total Cross Sections in Coupled-Channel Approach (2000)
R. K. Tripathi, John W. Wilson, Francis A. Cucinotta
Recently, nucleon-nucleon (N-N) cross sections in the medium have been extracted directly from experiment. The in-medium N-N cross sections form the basic ingredients of several heavy-ion scattering...
An Improved Elastic and Nonelastic Neutron Transport Algorithm for Space Radiation (2000)
Martha S. Clowdsley, John W. Wilson, John H. Heinbockel, R. K. Tripathi, Robert C. Singleterry, Judy L. Shinn
A neutron transport algorithm including both elastic and nonelastic particle interaction processes for use in space radiation protection for arbitrary shield material is developed. The algorithm is...
Shield Materials Optimization and Testing (2000)
J. W. Wilson, F. A. Cucinotta, R. K. Tripathi, M. S. Clowdsley, J. L. Shinn, R. C. Singleterry, ...
Introduction Methods by which radiation shielding is optimized need to be developed and materials of improved shielding characteristics identified and validated. The GCR are very penetrating and the...
Shield Materials Optimization and Testing (2000)
F. A. Cucinotta, R. K. Tripathi, M. S. Clowdsley, J. L. Shinn, R. C. Singleterry, S. A. Thibeault, ...
Introduction Methods by which radiation shielding is optimized need to be developed and materials of improved shielding characteristics identified and validated. The GCR are very penetrating and the...
Universal Parameterization of Absorption Cross Sections (1999)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
Our prior nuclear absorption cross sections model (NASA Technical Paper 3621) is extended for light systems where either both projectile and target are light particles or one is a light particle and...
Universal Parameterization of Absorption Cross Sections (1999)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
Our prior nuclear absorption cross sections model (NASA Technical Paper 3621) is extended for light systems where either both projectile and target are light particles or one is a light particle and...
A Simple Method for Nucleon-Nucleon Cross Sections in a Nucleus (1999)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
A simple reliable formalism is presented for obtaining nucleon-nucleon cross sections within a nucleus in nuclear collisions for a given projectile and target nucleus combination at a given energy...
A Simple Method for Nucleon-Nucleon Cross Sections in a Nucleus (1999)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
A simple reliable formalism is presented for obtaining nucleon-nucleon cross sections within a nucleus in nuclear collisions for a given projectile and target nucleus combination at a given energy...
Fragmentation of 200 and 244 MeV/u carbon beams in thick tissue-like absorbers (1999)
Golovchenko, A.N., Skvarc, J., Ilic, R., Sihver, L., Bamblevski, V.P., Tretyakova, S.P., ...
Fragmentation of 200 and 244 MeV/u carbon beams in thick tissue-like absorbers (1999)
Golovchenko, A.N., Skvarc, J., Ilic, R., Sihver, L., Bamblevski, V.P., Tretyakova, S.P., ...
NUCFRG2: An Evaluation of the Semiempirical Nuclear Fragmentation Database (1998)
J. W. Wilson, R. K. Tripathi, F. A. Cucinotta, J. L. Shinn, F. F. Badavi, S. Y. Chun, ...
A semiempirical abrasion-ablation model has been successful in generating a large nuclear database for the study of high charge and energy (HZE) ion beams, radiation physics, and galactic cosmic ray...
Extraction of In-Medium Nucleon-Nucleon Amplitude From Experiment (1998)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
The in-medium nucleon-nucleon amplitudes are extracted from the available proton-nucleus total reaction cross sections data. The retrieval of the information from the experiment makes the estimate of...
Extraction of In-Medium Nucleon-Nucleon Amplitude From Experiment (1998)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
The in-medium nucleon-nucleon amplitudes are extracted from the available proton-nucleus total reaction cross sections data. The retrieval of the information from the experiment makes the estimate of...
NASA Technical Paper 3621 (1997)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
This paper presents a simple universal parameterization of total reaction cross sections for any system of colliding nuclei that is valid for the entire energy range from a few AMeV to a few AGeV....
Universal Parameterization of Absorption Cross Sections (1997)
R. K. Tripathi, Francis A. Cucinotta, John W. Wilson
This paper presents a simple universal parameterization of total reaction cross sections for any system of colliding nuclei that is valid for the entire energy range from a few AMeV to a few AGeV....
A. N. Golovchenko, J. Skvar, R. Ili, L. Sihver, V. P. Bamblevski, S. P. Tretyakova, ...
Stacks consisting of thin CR-39 sheets sandwiched between thick Lucite and water absorbers were perpendicularly bombarded by 12 C ions at 200 and 244 MeV/u. Track radius distributions representing...
Surface Rodlets of Tilletia indica Teliospores
Gardner, John S., Hess, Wilford M., Tripathi, R. K.
Tilletia indica teliospores were studied by use of thin sections and freeze-etch replicas. Surfaces of these spores have rodlet patterns which differ from those previously reported for spores of...
The treatment of germinating maize seeds (cv. Ganga 2) with aflatoxin B1 resulted in suppression of ribonucleic acid (RNA), protein, and deoxyribonucleic acid (DNA) synthesis at 3, 4, and 5 h,...
Mechanism of Action of the Antifungal Antibiotic Pyrrolnitrin
Tripathi, R. K., Gottlieb, David
Pyrrolnitrin at 10 μg/ml inhibited the growth of Saccharomyces cerevisiae, Penicillium atrovenetum, and P. oxalicum. The primary site of action of pyrrolnitrin on S. cerevisiae was the terminal...
Giebel, L B, Tripathi, R K, King, R A, Spritz, R A
Type I oculocutaneous albinism (OCA) is an autosomal recessive disorder in which deficient synthesis of melanin pigment results from abnormal activity of melanocyte tyrosinase. A novel type I OCA...
pH-dependent interconversion of two forms of tyrosinase in human skin.
Tripathi, R K, Chaya Devi, C, Ramaiah, A
1. We have shown that the characteristic lag in cresolase activity of human skin tyrosinase at inhibitory concentration of tyrosine was absent at all pH values studied, i.e. pH 5.2, 5.7, 6.2 and 6.8,...
Lead exposure in outdoor firearm instructors.
Tripathi, R K, Sherertz, P C, Llewellyn, G C, Armstrong, C W
This study was conducted to determine lead exposure of firearm instructors at an outdoor firing range, while cadets were firing nonjacketed and jacketed lead ammunitions. The breathing zone air for...
Tripathi, R K, Bundey, S, Musarella, M A, Droetto, S, Strunk, K M, Holmes, S A, ...
Oculocutaneous albinism (OCA) is a group of autosomal recessive disorders characterized by deficient synthesis of melanin pigment. Type I (tyrosinase-deficient) OCA results from mutations of the...
Tyrosinase gene mutations associated with type IB ("yellow") oculocutaneous albinism.
Giebel, L B, Tripathi, R K, Strunk, K M, Hanifin, J M, Jackson, C E, King, R A, ...
We have identified three different tyrosinase gene mutant alleles in four unrelated patients with type IB ("yellow") oculocutaneous albinism (OCA) and thus have demonstrated that type IB OCA is...
Surface Rodlets of Tilletia indica Teliospores
Gardner, John S., Hess, Wilford M., Tripathi, R. K.
Tilletia indica teliospores were studied by use of thin sections and freeze-etch replicas. Surfaces of these spores have rodlet patterns which differ from those previously reported for spores of...
The treatment of germinating maize seeds (cv. Ganga 2) with aflatoxin B1 resulted in suppression of ribonucleic acid (RNA), protein, and deoxyribonucleic acid (DNA) synthesis at 3, 4, and 5 h,...
Mechanism of Action of the Antifungal Antibiotic Pyrrolnitrin
Tripathi, R. K., Gottlieb, David
Pyrrolnitrin at 10 μg/ml inhibited the growth of Saccharomyces cerevisiae, Penicillium atrovenetum, and P. oxalicum. The primary site of action of pyrrolnitrin on S. cerevisiae was the terminal...
Giebel, L B, Tripathi, R K, King, R A, Spritz, R A
Type I oculocutaneous albinism (OCA) is an autosomal recessive disorder in which deficient synthesis of melanin pigment results from abnormal activity of melanocyte tyrosinase. A novel type I OCA...
pH-dependent interconversion of two forms of tyrosinase in human skin.
Tripathi, R K, Chaya Devi, C, Ramaiah, A
1. We have shown that the characteristic lag in cresolase activity of human skin tyrosinase at inhibitory concentration of tyrosine was absent at all pH values studied, i.e. pH 5.2, 5.7, 6.2 and 6.8,...
Lead exposure in outdoor firearm instructors.
Tripathi, R K, Sherertz, P C, Llewellyn, G C, Armstrong, C W
This study was conducted to determine lead exposure of firearm instructors at an outdoor firing range, while cadets were firing nonjacketed and jacketed lead ammunitions. The breathing zone air for...
Tripathi, R K, Bundey, S, Musarella, M A, Droetto, S, Strunk, K M, Holmes, S A, ...
Oculocutaneous albinism (OCA) is a group of autosomal recessive disorders characterized by deficient synthesis of melanin pigment. Type I (tyrosinase-deficient) OCA results from mutations of the...
Tyrosinase gene mutations associated with type IB ("yellow") oculocutaneous albinism.
Giebel, L B, Tripathi, R K, Strunk, K M, Hanifin, J M, Jackson, C E, King, R A, ...
We have identified three different tyrosinase gene mutant alleles in four unrelated patients with type IB ("yellow") oculocutaneous albinism (OCA) and thus have demonstrated that type IB OCA is...
Gershoni-Baruch, R., Rosenmann, A., Droetto, S., Holmes, S., Tripathi, R. K., Spritz, R. A.
We have analyzed the tyrosinase (TYR) gene in 38 unrelated patients with oculocutaneous albinism (OCA), derived from several different ethnic groups of the diverse population of Israel. We detected...