نتایج جستجو برای: chlorophyll b and total chlorophylls
تعداد نتایج: 16990652 فیلتر نتایج به سال:
Allium tuberosum Rotter (garlic chives) is a species of plant native to the Chinese province and naturalized elsewhere in Asia around world. In Korea, chives are boiled used as seasoned vegetables or soup ingredients, also for chive kimchi cucumber pickles. This paper describes experimental results chlorophyll content efficiency with drought stress soil acidity on garlic chives. Analytical dete...
Pheophorbide a was prepared from a mixture o f chlorophylls a and b by differential extrac tion with HC1 and saponification. The insertion o f the following metal ions was investigated: Mg, Zn, Co, Cu, Ni. In the enzyme test with chlorophyll synthetase, the metallopheophorbides fall into two categories: the Mgand Zn-complexes are good substrates, the Co-, Cuand Ni-complexes are neither substra...
Chlorophylls are essential cofactors for photosynthesis, which sustains global food chains and oxygen production. Billions of tons of chlorophylls are synthesized annually, yet full understanding of chlorophyll biosynthesis has been hindered by the lack of characterization of the Mg-protoporphyrin IX monomethyl ester oxidative cyclase step, which confers the distinctive green color of these pig...
Peppermint (Mentha piperita L.), a herbaceous and perennial species whichis produced mainly for the medicine and food. The peppermint plants were initiated from 10 cm-long rhizome cuttings followed by transferring into pots. The 48 h-treated plants with methyl jasmonate (MJ) concentrations (0, 0.1, 0.5 mM) were assessed for their total soluble proteins, malondialdehyde (MDA), chlorophylls a, b ...
Several groups of chlorophyll-bearing photosynthetic organisms often coexist in anoxic waters. Because of the close similarity between the absorbance spectra of chlorophyll a (in cyanobacteria and algae) and the chlorophylls of green sulfur bacteria (Chl-GSB) it is difficult to distinguish these two groups of organisms where they co-occur. We have developed a simple method to measure both chlor...
The chromatographic behaviour of algal chlorophylls under ion-pair reversed-phase liquid chromatography conditions has been tested either on monomeric and polymeric octadecylsilica columns. Three five-carbon amino compounds (pentylamine, piperidine and pyridine), differing in their molecular shapes and chemical properties, have been used as counterions. The monomeric octadecylsilica column did ...
Nitrogen is a major plant macronutrient and its supply affects the entire metabolism of plants. This study evaluated effect different nitrogen concentrations in nutrient solution: 0, 4.2, 8.4, 12.6 mg L?1 Mexican marigold (Tagetes erecta L.) var. Inca plants an open soilless culture system under greenhouse conditions on concentration chlorophylls, carotenoids, phenolics, flavonoids derived from...
[(3)H]- and delta-[(14)C]Aminolevulinic acids were incorporated into the chlorophylls of Skeletonema costatum, a marine plankton diatom. In the stationary phase of growth, the tetrapyrrole-based pigments reached steady-state labeling after 10 hours. Under conditions of exponential cell division and chlorophyll accumulation, (3)H was rapidly lost from the labeled chlorophylls and was replaced wi...
The chlorophylls are the main pigments in green plants, algae and other photosynthetic microorganisms. They belong to a class of pyrrole ring compounds known as porphins. Derivatives of porphins are called porphyrins. Phorbin, a porphyrin formed by the addition of another ring structure, serves as the basis for all chlorophyll molecules (Fig. 2.1). Different types of chlorophyll may arise depen...
Many studies show the antioxidant ability of parasite plant. This study aims to determine capacity Dendrophthoe pentandra (L.) Miq and Scurrula ferruginea stem from Syzygium aqueum use as a natural source. The sample was taken host aqueum. sampels were exraction with ethanol using maceration. parameters determined spectrophotometrically specific reagents that 1,1-diphenyl-2-picrylhydrazyl, phen...
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