All Stories

  1. Altering the Structure of Carbohydrate Storage Granules in the Cyanobacterium Synechocystis sp. Strain PCC 6803 through Branching-Enzyme Truncations

    Article • Journal of Bacteriology, December 2015, ASM Journals

    Professor Louis A Sherman

  2. The effects of different light-dark cycles on the metabolism of the diazotrophic, unicellular cyanobacteriaCyanothecesp. ATCC 51142, andCyanothecesp. PCC 7822

    Article • Journal of Phycology, September 2014, Wiley

    Professor Louis A Sherman

  3. The Uptake Hydrogenase in the Unicellular Diazotrophic Cyanobacterium Cyanothece sp. Strain PCC 7822 Protects Nitrogenase from Oxygen Toxicity

    Article • Journal of Bacteriology, December 2013, ASM Journals

    Professor Louis A Sherman

  4. Essential role of the plasmidhik31operon in regulating central metabolism in the dark inSynechocystissp. PCC 6803

    Article • Molecular Microbiology, November 2013, Wiley

    Professor Louis A Sherman

  5. Analysis of carbohydrate storage granules in the diazotrophic cyanobacterium Cyanothece sp. PCC 7822

    Article • Photosynthesis Research, October 2013, Springer Science + Business Media

    Professor Louis A Sherman

  6. Highlights from the Indo-US workshop “Cyanobacteria: molecular networks to biofuels” held at Lonavala, India during December 16–20, 2012

    Article • Photosynthesis Research, October 2013, Springer Science + Business Media

    Professor Louis A Sherman

  7. Ultradian metabolic rhythm in the diazotrophic cyanobacterium Cyanothece sp. ATCC 51142

    Article • Proceedings of the National Academy of Sciences, July 2013, Proceedings of the National Academy of Sciences

    Professor Louis A Sherman

  8. Characterization of a pH-Sensitive Photosystem II Mutant in the Cyanobacterium Synechocystis sp. PCC 6803

    Article • January 2013, Springer Science + Business Media

    Professor Louis A Sherman

  9. The Role of Synthetic Biology for In Situ Resource Utilization (ISRU)

    Article • Astrobiology, December 2012, Mary Ann Liebert Inc

    Professor Louis A Sherman

  10. Proteome Analyses of Strains ATCC 51142 and PCC 7822 of the Diazotrophic Cyanobacterium Cyanothece sp. under Culture Conditions Resulting in Enhanced H2Production

    Article • Applied and Environmental Microbiology, November 2012, ASM Journals

    Professor Louis A Sherman

  11. Alternate copies of D1 are used by cyanobacteria under different environmental conditions

    Article • Photosynthesis Research, November 2012, Springer Science + Business Media

    Professor Louis A Sherman

  12. Net light-induced oxygen evolution in photosystem I deletion mutants of the cyanobacterium Synechocystis sp. PCC 6803

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, May 2012, Elsevier

    Professor Louis A Sherman

  13. A model of cyclic transcriptomic behavior in the cyanobacterium Cyanothece sp. ATCC 51142

    Article • Molecular BioSystems, January 2011, Royal Society of Chemistry

    Professor Louis A Sherman, Dr Jason E McDermott

  14. Diurnal Cycles And The Regulation Of Metabolism InThe Cyanobacterium Synechoscystis Sp. Pcc 6803

    Article • December 2010, Office of Scientific and Technical Information (OSTI)

    Professor Louis A Sherman

  15. Gene expression under low-oxygen conditions in the cyanobacterium Synechocystis sp. PCC 6803 demonstrates Hik31-dependent and -independent responses

    Article • Microbiology, October 2010, Society for General Microbiology

    Professor Louis A Sherman

  16. Hydrogen Production by the Unicellular, Diazotrophic Cyanobacterium Cyanothece sp. Strain ATCC 51142 under Conditions of Continuous Light

    Article • Applied and Environmental Microbiology, May 2010, ASM Journals

    Professor Louis A Sherman

  17. Better Living Through Cyanothece – Unicellular Diazotrophic Cyanobacteria with Highly Versatile Metabolic Systems

    Article • January 2010, Springer Science + Business Media

    Professor Louis A Sherman

  18. The Mechanism of Iron Homeostasis in the Unicellular Cyanobacterium Synechocystis sp. PCC 6803 and Its Relationship to Oxidative Stress

    Article • PLANT PHYSIOLOGY, June 2009, American Society of Plant Biologists (ASPB)

    Professor Louis A Sherman

  19. TRANSCRIPTIONAL ANALYSIS OF THE UNICELLULAR, DIAZOTROPHIC CYANOBACTERIUMCYANOTHECESP. ATCC 51142 GROWN UNDER SHORT DAY/NIGHT CYCLES

    Article • Journal of Phycology, June 2009, Wiley

    Professor Louis A Sherman, Dr Jason E McDermott

  20. Role of mrgA in peroxide and light stress in the cyanobacterium Synechocystis sp. PCC 6803

    Article • FEMS Microbiology Letters, April 2009, Oxford University Press (OUP)

    Professor Louis A Sherman

  21. The genome of Cyanothece 51142, a unicellular diazotrophic cyanobacterium important in the marine nitrogen cycle

    Article • Proceedings of the National Academy of Sciences, September 2008, Proceedings of the National Academy of Sciences

    Professor Louis A Sherman

  22. Global Transcriptional Response of the Alkali-Tolerant Cyanobacterium Synechocystis sp. Strain PCC 6803 to a pH 10 Environment

    Article • Applied and Environmental Microbiology, July 2008, ASM Journals

    Professor Louis A Sherman

  23. Differential Transcriptional Analysis of the Cyanobacterium Cyanothece sp. Strain ATCC 51142 during Light-Dark and Continuous-Light Growth

    Article • Journal of Bacteriology, April 2008, ASM Journals

    Professor Louis A Sherman

  24. Global gene expression of a ΔPsbO:ΔPsbU mutant and a spontaneous revertant in the cyanobacterium Synechocystis sp. strain PCC 6803

    Article • Photosynthesis Research, November 2007, Springer Science + Business Media

    Professor Louis A Sherman

  25. Role of Sigma Factors in Controlling Global Gene Expression in Light/Dark Transitions in the Cyanobacterium Synechocystis sp. Strain PCC 6803

    Article • Journal of Bacteriology, August 2007, ASM Journals

    Professor Louis A Sherman

  26. Reflections on the function of IsiA, a cyanobacterial stress-inducible, Chl-binding protein

    Article • Photosynthesis Research, March 2007, Springer Science + Business Media

    Professor Louis A Sherman

  27. Growth-phase dependent differential gene expression in Synechocystis sp. strain PCC 6803 and regulation by a group 2 sigma factor

    Article • Archives of Microbiology, December 2006, Springer Science + Business Media

    Professor Louis A Sherman

  28. The heat shock response in the cyanobacterium Synechocystis sp. Strain PCC 6803 and regulation of gene expression by HrcA and SigB

    Article • Archives of Microbiology, July 2006, Springer Science + Business Media

    Professor Louis A Sherman

  29. Iron-independent dynamics of IsiA production during the transition to stationary phase in the cyanobacterium Synechocystis sp. PCC 6803

    Article • FEMS Microbiology Letters, March 2006, Oxford University Press (OUP)

    Professor Louis A Sherman

  30. Novel adaptive responses revealed by transcription profiling of a Synechocystis sp. PCC 6803 ΔisiA mutant in the presence and absence of hydrogen peroxide

    Article • Photosynthesis Research, June 2005, Springer Science + Business Media

    Professor Louis A Sherman

  31. Microarray analysis and redox control of gene expression in the cyanobacterium Synechocystis sp. PCC 6803

    Article • Physiologia Plantarum, January 2004, Wiley

    Professor Louis A Sherman

  32. Characterization of Synechocystis sp. strain PCC 6803 and Δ nbl mutants under nitrogen-deficient conditions

    Article • Archives of Microbiology, October 2002, Springer Science + Business Media

    Professor Louis A Sherman

  33. Characterization of a stress-responsive operon in the cyanobacterium Synechocystis sp. strain PCC 6803

    Article • Gene, September 2002, Elsevier

    Professor Louis A Sherman

  34. Pattern of cyanophycin accumulation in nitrogen-fixing and non-nitrogen-fixing cyanobacteria

    Article • Archives of Microbiology, July 2001, Springer Science + Business Media

    Professor Louis A Sherman

  35. DOE Final report [A genetic analysis of the lumenal proteins of the PSII O{sub 2} evolving complex of cyanobacteria]

    Article • March 2001, Office of Scientific and Technical Information (OSTI)

    Professor Louis A Sherman

  36. HETEROCYST DEVELOPMENT AND LOCALIZATION OF CYANOPHYCIN IN N2-FIXING CULTURES OF ANABAENA SP. PCC 7120 (CYANOBACTERIA)

    Article • Journal of Phycology, October 2000, Wiley

    Professor Louis A Sherman

  37. Analysis of chlorophyll–protein complexes from the cyanobacterium Cyanothece sp. ATCC 51142 by non-denaturing gel electrophoresis

    Article • Biochimica et Biophysica Acta (BBA) - Biomembranes, September 2000, Elsevier

    Professor Louis A Sherman

  38. A Redox-Responsive Regulator of Photosynthesis Gene Expression in the Cyanobacterium Synechocystis sp. Strain PCC 6803

    Article • Journal of Bacteriology, August 2000, ASM Journals

    Professor Louis A Sherman

  39. Identification of Iron-Responsive, Differential Gene Expression in the Cyanobacterium Synechocystis sp. Strain PCC 6803 with a Customized Amplification Library

    Article • Journal of Bacteriology, June 2000, ASM Journals

    Professor Louis A Sherman

  40. Metabolic rhythms of a diazotrophic cyanobacterium,cyanothecesp. strain atcc 51142, heterotrophically grown in continuous dark

    Article • Journal of Phycology, February 2000, Wiley

    Professor Louis A Sherman

  41. Analysis of the nifHDK operon and structure of the NifH protein from the unicellular, diazotrophic cyanobacterium, Cyanothece strain sp. ATCC 5114211Accession numbers: AF003336 (nifH), AF003337 (nifD) and AF003338 (nifK).

    Article • Biochimica et Biophysica Acta (BBA) - General Subjects, December 1999, Elsevier

    Professor Louis A Sherman

  42. GROWTH, PHYSIOLOGY, AND ULTRASTRUCTURE OF A DIAZOTROPHIC CYANOBACTERIUM, CYANOTHECE SP. STRAIN ATCC 51142, IN MIXOTROPHIC AND CHEMOHETEROTROPHIC CULTURES1

    Article • Journal of Phycology, August 1997, Wiley

    Professor Louis A Sherman

  43. Composition of the carbohydrate granules of the cyanobacterium, Cyanothece sp. strain ATCC 51142

    Article • Archives of Microbiology, March 1997, Springer Science + Business Media

    Professor Louis A Sherman

  44. Improved 5-step modeling of the Photosystem II S-state mechanism in cyanobacteria

    Article • Photosynthesis Research, January 1996, Springer Science + Business Media

    Professor Louis A Sherman

  45. Compositional and toxicological evaluation of the diazotrophic Cyanobacterium, Cyanothece sp. strain ATCC 51142

    Article • Aquaculture, July 1995, Elsevier

    Professor Louis A Sherman

  46. Regulation of the O2-Evolving Mechanism during N2-Fixation in the Diazotrophic Cyanobacterium Cyanothece sp. ATCC 51142

    Article • January 1995, Springer Science + Business Media

    Professor Louis A Sherman

  47. Role of Disulfide Linkage and Putative Intermolecular Binding Residues in the Stability and Binding of the Extrinsic Manganese-Stabilizing Protein to the Photosystem II Reaction Center

    Article • Biochemistry, November 1994, American Chemical Society (ACS)

    Professor Louis A Sherman

  48. Immunocytochemical localization of the cytochrome-c oxidase in a cyanobacterium, Synechococcus PCC7942 (Anacystis nidulans)

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, September 1994, Elsevier

    Professor Louis A Sherman

  49. The Cyanobacterial Heat-Shock Response and the Molecular Chaperones

    Article • January 1994, Springer Science + Business Media

    Professor Louis A Sherman

  50. [36] Characteristics of membrane-associated carotenoid-binding proteins in cyanobacteria and prochlorophytes

    Article • January 1993, Elsevier

    Professor Louis A Sherman

  51. Chaperones classified

    Article • Nature, October 1992, Springer Science + Business Media

    Professor Louis A Sherman

  52. Oxygen yield and thermoluminescence characteristics of a cyanobacterium lacking the manganese-stabilizing protein of photosystem II

    Article • Biochemistry, August 1992, American Chemical Society (ACS)

    Professor Louis A Sherman

  53. Biomass Productivity and Sustainability of a Bioregenerative Life-Support System

    Article • July 1992, SAE International

    Professor Louis A Sherman

  54. Deletion mutagenesis in Synechocystis sp. PCC6803 indicates that the manganese-stabilizing protein of photosystem II is not essential for oxygen evolution

    Article • Biochemistry, January 1991, American Chemical Society (ACS)

    Professor Louis A Sherman

  55. Progress Towards the Production and Analysis of H2O Splitting Mutants of the Cyanobacterium Synechocystis sp. PCC6803

    Article • January 1990, Springer Science + Business Media

    Professor Louis A Sherman

  56. Immunological characterization of the Prochlorothrix hollandica and Prochloron sp. chlorophyll a/b antenna proteins

    Article • FEMS Microbiology Letters, January 1990, Oxford University Press (OUP)

    Professor Louis A Sherman

  57. Oxygen evolving membranes and particles from the transformable cyanobacterium Synechocystis sp. PCC6803

    Article • Photosynthesis Research, November 1989, Springer Science + Business Media

    Professor Louis A Sherman

  58. Molecular Analysis of a Gene (irpA) Encoding a Function Essential for Iron-limited Growth in the Cyanobacterium Anacystis nidulans R2

    Article • January 1989, Springer Science + Business Media

    Professor Louis A Sherman

  59. Lambda ZAP: Improved Strategies for Expression Library Construction and Use

    Article • DNA, January 1989, Mary Ann Liebert Inc

    Professor Louis A Sherman

  60. Immunological Characterization of Iron-Regulated Membrane Proteins in the Cyanobacterium Anacystis nidulans R2

    Article • PLANT PHYSIOLOGY, October 1988, American Society of Plant Biologists (ASPB)

    Professor Louis A Sherman

  61. Regulation of cyanobacterial pigment-protein composition and organization by environmental factors

    Article • Photosynthesis Research, October 1988, Springer Science + Business Media

    Professor Louis A Sherman

  62. Purification and characterization of an iron stress-induced chlorophyll-protein from the cyanobacterium Anacystis nidulans R2

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, September 1988, Elsevier

    Professor Louis A Sherman

  63. Regulation of cyanobacterial pigment-protein composition and organization by environmental factors

    Article • January 1988, Springer Science + Business Media

    Professor Louis A Sherman

  64. Nucleotide sequence of the gene from the cyanobacterium Anacystis nidulans R2 encoding the Mn-stabilizing protein involved in photosystem II water oxidation.

    Article • Proceedings of the National Academy of Sciences, December 1987, Proceedings of the National Academy of Sciences

    Professor Louis A Sherman

  65. Chlorophyll-protein composition of the thylakoid membrane from Prochlorothrix hollandica, a prokaryote containing chlorophyll b

    Article • European Journal of Biochemistry, October 1987, Wiley

    Professor Louis A Sherman

  66. Isolation and Characterization of a Carotenoid-Associated Thylakoid Protein from the Cyanobacterium Anacystis nidulans R2

    Article • PLANT PHYSIOLOGY, July 1987, American Society of Plant Biologists (ASPB)

    Professor Louis A Sherman

  67. Phycobilisome-associated glycoproteins in the cyanobacteriumAnacystis nidulansR 2

    Article • FEBS Letters, May 1987, Wiley

    Professor Louis A Sherman

  68. Isolation and Characterization of A Carotenoid-Associated Membrane Protein from The Cyanobacterium, Anacystis Nidulans R2

    Article • January 1987, Springer Science + Business Media

    Professor Louis A Sherman

  69. Characterization of a Novel Chlorophyll-Binding Component of Cyanobacterial Thylakoids

    Article • January 1987, Springer Science + Business Media

    Professor Louis A Sherman

  70. Isolation and Immunological Characterization of a Carotenoid-Binding Protein from the Cyanobacteria Synechocystis Sp. PCC6714 and Anacystis Nidulans R2

    Article • January 1987, Springer Science + Business Media

    Professor Louis A Sherman

  71. Cloning and Characterization of a Gene Encoding an Iron-Regulated Membrane Protein in Anacystis Nidulans R2

    Article • January 1987, Springer Science + Business Media

    Professor Louis A Sherman

  72. Genetic Analysis of a Cyanobacterial Gene Encoding a Membrane Protein Which Accumulates Under Iron Stress

    Article • January 1987, Springer Science + Business Media

    Professor Louis A Sherman

  73. The Construction of Hybrid Cloning Vectors and the Improvement of Transformation Efficiency in the Cyanobacteria, Anacystis Nidulans R2 and A. Nidulans R2-SPC

    Article • January 1987, Springer Science + Business Media

    Professor Louis A Sherman

  74. Immunological characterization of photosystem II chlorophyll-binding proteins from the cyanobacterium,Aphanocapsa 6714

    Article • Journal of Bioenergetics and Biomembranes, August 1986, Springer Science + Business Media

    Professor Louis A Sherman

  75. Organization of the thylakoid membrane from the heterotrophic cyanobacterium, Aphanocapsa 6714

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, November 1985, Elsevier

    Professor Louis A Sherman

  76. Organization of pigment proteins in the photosystem II complex of the cyanobacterium Anacystis nidulans R2.

    Article • Proceedings of the National Academy of Sciences, October 1985, Proceedings of the National Academy of Sciences

    Professor Louis A Sherman

  77. Membrane Development in the Cyanobacterium, Anacystis nidulans, during Recovery from Iron Starvation

    Article • PLANT PHYSIOLOGY, September 1985, American Society of Plant Biologists (ASPB)

    Professor Louis A Sherman

  78. Characterization of a spinach photosystem II core preparation isolated by a simplified method

    Article • Archives of Biochemistry and Biophysics, February 1985, Elsevier

    Professor Louis A Sherman

  79. Triton X-114 phase fractionation of membrane proteins of the cyanobacterium Anacystis nidulans R2

    Article • Archives of Biochemistry and Biophysics, November 1984, Elsevier

    Professor Louis A Sherman

  80. A Highly Active Oxygen-Evolving Photosystem II Preparation from the Cyanobacterium Anacystis nidulans

    Article • PLANT PHYSIOLOGY, March 1984, American Society of Plant Biologists (ASPB)

    Professor Louis A Sherman

  81. Biochemical and biophysical characterization of herbicide-resistant mutants of the unicellular cyanobacterium, Anacystis nidulans R2

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, February 1984, Elsevier

    Professor Louis A Sherman

  82. Cloning of Photosynthesis Genes from the Cyanobacterium Anacystis Nidulans R2

    Article • January 1984, Springer Science + Business Media

    Professor Louis A Sherman

  83. Biochemical characterization of a highly active O2-evolving Photosystem II preparation from maize

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, September 1983, Elsevier

    Professor Louis A Sherman

  84. Chlorophyll-protein organization of membranes from the cyanobacterium Anacystis nidulans

    Article • Archives of Biochemistry and Biophysics, January 1983, Elsevier

    Professor Louis A Sherman

  85. Triton X-114 phase-fractionation of maize thylakoid membranes in the investigation of thylakoid protein topology

    Article • FEBS Letters, November 1982, Wiley

    Professor Louis A Sherman

  86. Protein composition and architecture of the photosynthetic membranes from the cyanobacterium, Anacystis nidulans R2

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, September 1982, Elsevier

    Professor Louis A Sherman

  87. Photosynthesis and Cloning in Cyanobacteria

    Article • January 1982, Springer Science + Business Media

    Professor Louis A Sherman

  88. Electrophoretic profiles of cyanobacterial membrane polypeptides showing heme-dependent peroxidase activity

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, September 1981, Elsevier

    Professor Louis A Sherman

  89. Internal and external membrane proteins of the cyanobacterium, Synechococcus cedrorum

    Article • Biochimica et Biophysica Acta (BBA) - Biomembranes, January 1981, Elsevier

    Professor Louis A Sherman

  90. Metronidazole and the isolation of temperature-sensitive photosynthetic mutants in cyanobacteria

    Article • Journal of Bioenergetics and Biomembranes, August 1980, Springer Science + Business Media

    Professor Louis A Sherman

  91. Photosynthetic characteristics of temperature-sensitive-high fluorescence mutants of the blue-green alga, Synechococcus cedrorum

    Article • Plant Science Letters, February 1979, Elsevier

    Professor Louis A Sherman

  92. DIFFERENCES IN PHOTOSYNTHESIS-ASSOCIATED PROPERTIES OF THE BLUEGREEN ALGA SYNECHOCOCCUS CEDRORUM CROWN AT 30 AND 40 C1

    Article • Journal of Phycology, December 1978, Wiley

    Professor Louis A Sherman

  93. Isolation and characterization of Photosystem I and II membrane particles from the blue-green alga, Synechococcus cedrorum

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, August 1978, Elsevier

    Professor Louis A Sherman

  94. Cyanophages and Viruses of Eukaryotic Algae

    Article • January 1978, Springer Science + Business Media

    Professor Louis A Sherman

  95. Isolation and characterization of temperature-sensitive, high-fluorescence mutations of the blue-green alga, Synechococcus cedrorum

    Article • Plant Science Letters, April 1977, Elsevier

    Professor Louis A Sherman

  96. Isolation and characterization of a cyanophage infecting the unicellular blue-green algae A. nidulans and S. cedrorum

    Article • Virology, July 1976, Elsevier

    Professor Louis A Sherman

  97. Infection of Synechococcus cedrorum by the cyanophage AS-1M

    Article • Virology, May 1976, Elsevier

    Professor Louis A Sherman

  98. Infection of Synechococcus cedrorum by the cyanophage AS-1M

    Article • Virology, May 1976, Elsevier

    Professor Louis A Sherman

  99. Infection of Synechococcus cedrorum by the cyanophage AS-1M

    Article • Virology, May 1976, Elsevier

    Professor Louis A Sherman

  100. Photosynthetically-linked oxidation of diaminobenzidine in blue-green algae

    Article • Journal of Ultrastructure Research, December 1975, Elsevier

    Professor Louis A Sherman

  101. Proton uptake and quenching of bacteriochlorophyll fluorescence in Rhodopseudomonas spheroides

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, October 1972, Elsevier

    Professor Louis A Sherman

  102. The effect of diaminodurene on the delayed light and the carotenoid band shift in Rhodopseudomonas spheroides

    Article • Biochimica et Biophysica Acta (BBA) - Bioenergetics, October 1972, Elsevier

    Professor Louis A Sherman

  103. The lack of carotenoid band shifts in a non-photosynthetic, reaction centerless mutant ofRhodopseudomonas spheroides

    Article • FEBS Letters, April 1972, Wiley

    Professor Louis A Sherman

  104. Growth of the blue-green algae virus LPP-1 under conditions which impair photosynthesis

    Article • Virology, September 1971, Elsevier

    Professor Louis A Sherman

  105. Proton translocation and energy dependent quenching of chlorophyll a fluorescence

    Article • FEBS Letters, September 1971, Wiley

    Professor Louis A Sherman

  106. Serological and electron microscopic characterization of a new group of blue-green algal viruses (LPP-2)

    Article • Virology, December 1969, Elsevier

    Professor Louis A Sherman

  107. The Cyanobacterial Heat-Shock Response and the Molecular Chaperones

    Article • Springer Science + Business Media

    Professor Louis A Sherman

  108. Genomics and Systems Biology Analysis of Cyanothece sp. ATCC 51142, a Unicellular, Diazotrophic Cyanobacterium with Robust Metabolic Rhythms

    Article • Springer Science + Business Media

    Professor Louis A Sherman

  109. Genomics and Genetic Transformation in the Unicellular Diazotrophic Cyanobacterium Cyanothece sp. ATCC 51142

    Article • Springer Science + Business Media

    Professor Louis A Sherman