Probing Plant Structure
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Probing Plant Structure
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Author : John Troughton
language : en
Publisher:
Release Date : 1972
Probing Plant Structure written by John Troughton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Plant anatomy categories.
Probing Plant Structure
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Author : John Troughton
language : en
Publisher:
Release Date : 1991
Probing Plant Structure written by John Troughton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Electron microscopy categories.
Probing Plant Structure
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Author : John Howard Troughton
language : en
Publisher:
Release Date : 1972
Probing Plant Structure written by John Howard Troughton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Botany categories.
Leaf surface - Stomata - Inside the leaf - Chloroplasts - Xylem - Apical meristem - Fertilization and seed developmentnt__
Probing Plant Structure A Scanning Election Microscope Study Of Some Anatomical Features In Plants Process
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Author : A. Donaldson Lesley
language : en
Publisher:
Release Date : 1972
Probing Plant Structure A Scanning Election Microscope Study Of Some Anatomical Features In Plants Process written by A. Donaldson Lesley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with Plant anatomy categories.
Probing Plant Structure
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Author : John H. Troughton
language : de
Publisher:
Release Date : 1972
Probing Plant Structure written by John H. Troughton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.
Probing Photosynthesis
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Author : Mohammad Yunus
language : en
Publisher: CRC Press
Release Date : 2014-04-21
Probing Photosynthesis written by Mohammad Yunus and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-21 with Science categories.
Probing Photosynthesis represents the cutting edge of research on photosynthesis and provides details of experimental approaches that have been adopted to understand it's complex regulatory and adaptive processes. Its twenty seven chapters have been divided into four sections: Evolution, structure and function; Biodiversity metabolism and regulatio
An Introduction To Plant Structure And Development
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Author : Charles B. Beck
language : en
Publisher: Cambridge University Press
Release Date : 2005-10-27
An Introduction To Plant Structure And Development written by Charles B. Beck and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-10-27 with Science categories.
An Introduction to Plant Structure and Development incorporates basic knowledge of plant anatomy with contemporary information and ideas about the development of structure and form.
Probing The Mesoscale Structure Of Crystalline Cellulose In Plant Biomass Using Sum Frequency Generation Sfg Vibrational Spectroscopy
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Author : Christopher Lee
language : en
Publisher:
Release Date : 2016
Probing The Mesoscale Structure Of Crystalline Cellulose In Plant Biomass Using Sum Frequency Generation Sfg Vibrational Spectroscopy written by Christopher Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
However, the crystalline cellulose assembly inside plant cell walls is extremely difficult to analyze in their intact states. This study utilizes sum frequency generation (SFG) vibration spectroscopy which can selectively detect crystalline cellulose within intact plant biomass, due to the unique requirement of non-centrosymmetric ordering. In this work we found that SFG is sensitive to the molecular structure, crystal structure and mesoscale structure of cellulose inside plant biomass. Obtaining such structural information spanning multiple length scales is not achievable by conventional analytical methods. Therefore, SFG presents a unique opportunity to study the hierarchical structures of cellulose in plant cell walls which are designed for specific biological functions. At the nanoscale, the molecular and crystal structures of cellulose are determined by the covalent bonds as well as hydrogen bonding networks between glucan chains. The peak positions in the SFG spectra of native cellulose I and I were identified through comparison to the vibration frequencies calculated with density functional theory with dispersion corrections (DFT-D2). The frequencies from DFT-D2 calculations allowed the full assignments of the dominant SFG peaks. These are the localized CH2 symmetric (2850, 2886 cm-1) and asymmetric (2920, 2944, 2968 cm-1) stretching vibrations, and the coupled 2O-H (3270 cm-1), 2,3,6O-H (33003330 cm-1) and 3O-H (3370 cm-1) stretching vibrations. The observation that O-H stretching vibration modes are highly coupled through hydrogen bonds lead to new assignments for the O-H peaks which replaced the incorrect assignments propagating in the literature for more than two decades. These advances in spectral interpretation of cellulose vibrational spectra are critical to utilize SFG analysis for the identification of cellulose crystal structures. SFG was employed to distinguish between the native crystal structures (I and I) from the artificially-induced polymorphs (cellulose II, IIII and IIIII). This study showed that SFG is sensitive to cellulose crystal structure; due to the non-centrosymmetric ordering of polar cellulose chains within the crystallographic unit cell at the nanometer length scale. The SFG intensity in the O-H stretching region was strong for crystals containing parallel chains (I and IIII) and quite weak for antiparallel chains (II and IIIII) due to the symmetry cancellation of the OH stretching vibrations. The SFG intensity is also dependent on the non-centrosymmetric ordering of functional groups or crystallites over the SFG coherence length which is approximately hundreds of nanometers to microns. Two reference samples of purified cellulose I were used: uniaxially-aligned crystallites and randomly-packed or aggregated crystallites. It was found that the overall SFG intensities and peak shapes of the alkyl (C-H) and hydroxyl (O-H) stretch modes correlate with the lateral packing and net directionality of cellulose microfibrils at the mesoscale. Cellulose SFG spectra of cell walls from various plant species could be identified into two groups based on the (C-H/O-H) intensity ratios. The first group included antiparallel-packed cellulose microfibrils as found in textile fibers and secondary cell walls of dicots and monocots. The second group included non-antiparallel packed cellulose as found in primary cell walls, algal cell walls, bacterial biofilms and tunicate mantles. This study showed that SFG can distinguish between cellulose within the (primary) walls of actively growing cells and cellulose within (secondary) walls of matured and lignified cells. The (C-H/O-H) intensity ratio was utilized to study the development of cotton fibers from two species, G. hirsutum and G. barbadense, which had different lateral packing at the mesoscale depending on the natural drying process that takes place during the maturation stage. The (C-H/O-H) intensity ratio was also used to determine the mesoscale packing of bacterial cellulose pellicles produced from two strains of G. xylinus. The packing pattern of crystalline cellulose was found to be different on the upper and lower portions of the pellicle and culture time of the bacteria. A broadband sum frequency generation spectrometer combined with a microscope (BB-SFG-M) was constructed in order to visualize the heterogeneous nature of cellulose across plant tissues with different cell types. We demonstrated the applicability of SFG microscopy to secondary cell walls in cotton fibers and the primary cell walls from onion epidermal cells.
Plant Anatomy And Embryology
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Author : Pandey S.N. & Chadha A.
language : en
Publisher: Vikas Publishing House
Release Date : 2009-11
Plant Anatomy And Embryology written by Pandey S.N. & Chadha A. and has been published by Vikas Publishing House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-11 with Science categories.
The book, by virtue of its authoritative coverage, should be most suitable to undergraduate as well as postgraduate students of all universities and also to those appearing for various competitive examinations such as CPMT, DME, DCS and IAS.
Molecular Biology Of The Cell
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Author : Bruce Alberts
language : en
Publisher:
Release Date : 2002
Molecular Biology Of The Cell written by Bruce Alberts and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Cytology categories.
