Results 11 to 20 of about 27,628 (212)

Fluorescence Lifetime Imaging and Spectroscopic Co-Validation for Protoporphyrin IX-Guided Tumor Visualization in Neurosurgery

open access: yesFrontiers in Oncology, 2021
Maximal safe resection is a key strategy for improving patient prognosis in the management of brain tumors. Intraoperative fluorescence guidance has emerged as a standard in the surgery of high-grade gliomas.
David Reichert   +17 more
doaj   +1 more source

Zn protoporphyrin IX is formed not from heme but from protoporphyrin IX [PDF]

open access: yesMeat Science, 2007
We examined the effects of exogenous myoglobin, a bivalent chelator, and nitrite on Zn protoporphyrin IX (ZPP) formation by using model systems. ZPP was formed in a model solution without addition of exogenous myoglobin. After incubation, the amount of ZPP in a model solution was increased but that of heme was not decreased compared with the amounts ...
Wakamatsu, Jun-ichi   +4 more
openaire   +3 more sources

Accumulation of protoporphyrin IX and Zn protoporphyrin IX in Cyanidium caldarium [PDF]

open access: yesProceedings of the National Academy of Sciences, 1981
In vivo fluorescence studies of Cyanidium caldarium mutants grown in the dark in dextrose-containing media have shown that these organisms accumulate protoporphyrin IX. In the dark the accumulated protoporphyrin IX is gradually turned into a metalloporphyrin, Zn protoporphyrin.
K, Csatorday, R, Maccoll, D S, Berns
openaire   +2 more sources

iTRAQ-Based Quantitative Proteomics Identifies Potential Regulatory Proteins Involved in Chicken Eggshell Brownness. [PDF]

open access: yesPLoS ONE, 2016
Brown eggs are popular in many countries and consumers regard eggshell brownness as an important indicator of egg quality. However, the potential regulatory proteins and detailed molecular mechanisms regulating eggshell brownness have yet to be clearly ...
Guangqi Li   +5 more
doaj   +1 more source

The HemQ coprohaem decarboxylase generates reactive oxygen species: implications for the evolution of classical haem biosynthesis [PDF]

open access: yes, 2016
Bacteria require a haem biosynthetic pathway for the assembly of a variety of protein complexes including cytochromes, peroxidases, globins, and catalase.
Aravind Menon   +42 more
core   +2 more sources

Knock-out of the Mg protoporphyrin IX methyltransferase gene in Arabidopsis: Effects on chloroplast development and on chloroplast-to-nucleus signaling. [PDF]

open access: yes, 2006
International audienceProtoporphyrin IX is the last common intermediate between the haem and chlorophyll biosynthesis pathways. The addition of Mg directs this molecule toward chlorophyll biosynthesis.
Albrieux, Catherine   +4 more
core   +2 more sources

Protoporphyrin IX photodynamic therapy for synovitis [PDF]

open access: yesArthritis & Rheumatism, 2002
AbstractObjectiveTo determine the conditions for synovial accumulation of protoporphyrin IX (PpIX) and photodynamic therapy (PDT)–induced synovial cytotoxicity in vitro and in vivo.MethodsSynovial tissues were obtained from mice with antigen‐induced arthritis (AIA) and incubated with different concentrations of 5‐aminolevulinic acid hexyl ester (h‐ALA),
Gailute, Kirdaite   +5 more
openaire   +2 more sources

Metalloporphyrins inactivate caspase-3 and -8 [PDF]

open access: yes, 2005
Activation of caspases represents one of the earliest biochemical indicators for apoptotic cell death. Therefore, measurement of caspase activity is a widely used and generally accepted method to determine apoptosis in a wide range of in vivo and in ...
Blumenthal, Signe B.   +8 more
core   +1 more source

Optimasi Ekstraksi Protoporphyrin-IX dari Kerabang Telur Puyuh (Coturnix Coturnix L.)

open access: yesEduChemia, 2018
Industri tekstil banyak menggunakan pewarna sintetik karena mudah dalam pewarnaan dan murah, tetapi memiliki dampak yang buruk bagi lingkungan sekitar.
Harry Setiawan   +3 more
doaj   +1 more source

Eggshell pigment composition covaries with phylogeny but not with life history or with nesting ecology traits of British passerines [PDF]

open access: yes, 2015
No single hypothesis is likely to explain the diversity in eggshell coloration and patterning across birds, suggesting that eggshell appearance is most likely to have evolved to fulfill many nonexclusive functions.
Brulez, Kaat   +9 more
core   +7 more sources

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