Results 71 to 80 of about 235,537 (313)

Photodecomposition of Chlorophylls and Chlorophyll Derivatives

Eiyo To Shokuryo, 1969
クロロフィル, クロロフィリン, フェオフィチンおよびクロロフィル誘導体の銅クロロフィル, 銅クロロフィリンナトリウム, 鉄クロロフィリンナトリウムの光分解, さらにクロロフィルaの光分解に対する水分, 遷移金属 (Fe2+, Fe3+), L-アスコルビン酸の影響を検討し, 次の結果をえた。1. クロロフィルは著しい光分解をうけ, とくにクロロフィルaはbに比較してその光分解度が大きい。2. クロロフィリンはクロロフィルaより光に対してはるかに安定であるが光分解をうける。とくに溶液の濃度が薄いほど光分解度が増大する。3. フェオフィチンは光に対してやや不安定で光分解をうける。4.
Mori, Yasunori, Nawata, Takako, Ikeda, Yumiko, Matsumoto, Naemi   +3 more
openaire   +2 more sources

CHLOROPHYLL DEGRADATION

Annual Review of Plant Physiology and Plant Molecular Biology, 1999
▪ Abstract  Although the loss of green color in senescent leaves and ripening fruits is a spectacular natural phenomenon, research on chlorophyll breakdown has been largely neglected until recently. This review summarizes knowledge about the fate of chlorophyll in degreening tissues that has been gained during the past few years. Structures of end- and
Matile P, Hortensteiner S, Thomas H
openaire   +3 more sources

DMS‐MaPseq and DREEM Analyses Implicate the Critical Role of RNA Structural Dynamics in Turnip Yellow Mosaic Virus Pathogenicity

Advanced Science, EarlyView.
RNA structural profiling of Turnip Yellow Mosaic Virus by DMS‐MaPseq and DREEM analyses uncover that viral genome‐wide RSS is highly complicated and heterogeneous, with alternative RSSs widely distributed across the genome. Notably, the viral 3’ tRNA‐like structure adopts alternative conformations in vivo.
Jiaying Zhu, Changhao Li, Chisimbily Onyia, Xindi Li, Xingxing Yan, Songxiao Zhong, Taerin Oh, Xiuren Zhang   +7 more
wiley   +1 more source

π‐Enlargement in Porphyrin Macrocycles at Interfaces

Angewandte Chemie, EarlyView.
On‐surface synthesis of a 20‐π free‐base expanded porphyrin, by depositing onto a hot Ag(111) substrate an 18‐π free‐base precursor equipped with ‐CF3 functional groups ABSTRACT Porphyrins are essential heteroatomic macrocycles, fundamental to both biological systems and advanced technology.
Ana Barragán, Elena Pérez‐Elvira, Alba García‐Frutos, Diego J. Vicent, Pingo Mutombo, Koen Lauwaet, José M. Gallego, Rodolfo Miranda, José I. Urgel, Aurelio Gallardo, Nazario Martín, David Écija   +11 more
wiley   +2 more sources

The Influence of X-ray Radiation on the Morphological, Biochemical, and Molecular Changes in Copiapoa tenuissima Seedlings

Agronomy
Cactaceae are a significant group of ornamental plants in the horticultural market. In the present study, X-rays were used for the first time to induce mutational changes in the cactus Copiapoa tenuissima.
Piotr Licznerski, Emilia Michałowska, Alicja Tymoszuk, Janusz Winiecki, Justyna Lema-Rumińska   +4 more
doaj   +1 more source

Desiccation and recovery of periphyton biomass and density in a subtropical lentic ecosystem - doi: 10.4025/actascibiolsci.v35i3.14022

Acta Scientiarum: Biological Sciences, 2013
This study assessed the desiccation effects on biomass and algal density of periphyton in a subtropical lentic ecosystem. This experiment was conducted with only one in situ experimental desiccation event for 15 hours in a mature periphytic community ...
Vanessa Majewski Algarte, Natália Silveira Siqueira, Liliana Rodrigues   +2 more
doaj   +1 more source

Histone Modification Complex JMJ704‐HDA709 Negatively Regulates Salinity Tolerance in Rice

Advanced Science, EarlyView.
This study reveals that the rice histone demethylase JMJ704 interacts with HDA709―a H3K9ac deacetylase characterized herein―to form a chromatin‐modifying complex. Under salt stress, OsWRKY72 recruits this complex through interaction with JMJ704 to target loci, repressing the expression of oxidative stress and salt‐responsive genes via removal of ...
Jing Wang, Zhengting Chen, Pengxiang Bai, Biao Liu, Lingling Meng, Jian Zhang, Xu Li, Dao‐Xiu Zhou, Xuan Ma, Yu Zhao   +9 more
wiley   +1 more source

Rapid prediction of Porphyra photosynthetic pigments based on colorimetric parameters

Frontiers in Sustainable Food Systems
Photosynthetic pigments such as phycobiliproteins and chlorophyll a are important quality indicators of seaweeds. In this study, multivariate nonlinear regression (MNLR) models were developed and validated for the rapid determination of photosynthetic ...
Xiaochen Chen, Xiaochen Chen, Xiaochen Chen, Biyun Yang, Xiping Du, Xiping Du, Xiping Du, Xiping Du, Qingyan Li, Qingyan Li, Zhipeng Li, Zhipeng Li, Zhipeng Li, Zhipeng Li, Yuanfan Yang, Yuanfan Yang, Yuanfan Yang, Yuanfan Yang, Zedong Jiang, Zedong Jiang, Zedong Jiang, Zedong Jiang, Yanbing Zhu, Yanbing Zhu, Yanbing Zhu, Yanbing Zhu, Hui Ni, Hui Ni, Hui Ni, Hui Ni, Hui Ni, Xiongping Miao   +31 more
doaj   +1 more source

A Disaggregation Strategy for Nanopesticide Fabrication: Investigating the Impact of Nanosizing on Pesticide Biointeractions

Advanced Science, EarlyView.
To explore the impact of nanosizing on pesticide biointeractions, a 7‐nm (average) emamectin benzoate nanopesticide without nanocarriers or surfactants is fabricated via HOAc‐mediated disaggregation. Nanosizing enhances bioactivity against Megalurothrips usitatus and Meloidogyne enterolobii and improves plant penetration.
Jiaqi Wei, Jianxin Feng, Huiting Zhu, Kunzhong Lin, Chenhan Liu, Lin Li, Zhuoyan Xiao, Daihao Huang, Rong Liu, Huipeng Pan, Lingda Zeng, Hanhong Xu   +11 more
wiley   +1 more source

Quantification of chlorophyll a, chlorophyll b and pheopigments a in lake sediments through deconvolution of bulk UV–VIS absorption spectra [PDF]

, 2020
Assessments of aquatic paleoproduction and pigment preservation require accurate identification and quantification of sedimentary chlorophylls. Using chromatographic techniques to analyze long records at high resolution is impractical because they are ...
Grosjean, Martin, Sanchini, Andrea
core   +1 more source