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Questions related from Mohamad Issaoui
Hi, Normally, the success of seed germination through in vitro culture is influenced by several factors such as medium composition, seed origin (plant species), seed maturity... The success to...
17 June 2019 8,965 22 View
Hello Unfortunately, fresh fruits last few days/weeks before being spoiled in the refrigerator. That spoilage is due to air-borne mold species such as Aspergillus, Cladosporium, botrytis and...
21 March 2019 3,255 3 View
Is there any report on the use of LnRNAs as gene silencing tool?
12 March 2019 7,983 7 View
α -tocopherol is the major vitamin E present in green plant tissues, more specifically in the membranes of chloroplasts and thylakoids. I performed many protocols to detect and quantify α...
14 December 2018 7,872 18 View
Hi The inhibition of spore germination and growth of Botrytis cinerea upon treatment with toxic molecule occured on solid culture medium (petri dishes) as predicted before. Strikingly, the...
08 October 2018 4,348 14 View
How many chlorophyll molecules are involved in photosynthesis?
03 June 2018 4,446 8 View
Many photosensitizers have a singlet oxygen quantum yield (ΦΔ) equal 0.99 (or 1). Does it mean that these photosensitizers are exclusively acting via type II photochemical reactions? (ΦΔ=1 →...
28 March 2018 1,174 8 View
Ascorbate peroxidase APX is the most important specific peroxidase mediating H2O2 scavenging. It is mainly found in cytoplasm, mitochondria, peroxisome, chloroplasts. The localization of such...
06 March 2018 9,568 0 View
Are pi interactions and van der waals considered as hydrophobic interactions?
04 March 2018 9,076 8 View
Methylene blue is widely used as powerful photosensitizer in PDT and antimicrobial photodynamic therapy. In the other hand, methylene blue is commonly used for DNA staining and sometimes it shows...
23 February 2018 7,979 4 View
Zinc-tetrakis(4-N-methyl pyridyl)porphyrin has an absorption soret band at λ=437 nm whereas λexcitation=458 nm. ( λemission=640 nm). How can we explain this difference??
22 February 2018 2,178 12 View
What are the differences between stokes radius, radius of gyration and hydrodynamic radius ?? and how can they be measured (size exclusion chromatography, DLS, SAXS) ??
20 February 2018 3,665 5 View
Why does water molecule forms 4 hydrogen bonds maximum with others water molecules?? Is there any method to determine number of H bonds acceptance (for other molecules) (see attached pic.)
19 February 2018 4,318 10 View
what is the relation between concentration and chemical stability of a solution? the more concentrated the solution, the more stable it is or it is the opposite??
12 February 2018 8,050 4 View
1) Number of coordinated bonds? 4 or 2 ?? 2) Is the metal in the core charged or neutral ? (See attached pic.)
12 February 2018 5,990 21 View
How hydrophobic polymers as cellulose and lignin can be used as efficient nanoparticles for poorly water-soluble agent delivery in aqueous environment (blood, extracellular fluid, in vitro...
06 February 2018 2,147 3 View
Pre-emergent herbicides kill weeds before emergence from soil whereas Post-emergent ones eradicate weeds that have already emerged from soil. What is better herbicide to use? pre-emergent or...
03 February 2018 4,442 34 View
What are the differences between anhydrous and hydrate forms of inorganic salts (AlCl3 , MgSO4 ...) in term of their use for biological applications (ex: in vitro culture) ??
02 February 2018 7,258 8 View
Can we consider photodynamic therapy of cancer (PDT) as an alternative method of conventinal cancer therapies like surgery, radiotherapy, chemotherapy ?? or it is just a complementary modality...
30 January 2018 3,144 8 View
Functional genomics is a field of molecular biology. What are the common and uncommon tools between them?
02 January 2018 9,530 3 View
When I recorded the absorption spectrum of the free base 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin (THPP) dissolved in NaOH at 2 µM, I noticed that there is two bands Q instead of four. Is...
23 December 2017 7,537 2 View
Usually, Log P iscalculated to detrmine the lipophilicity (or hydrophilicity) of a chemical compound, hence it has several applications in pharmacology and drug interaction with biological...
23 December 2017 7,252 9 View
Pectin polysmers are integral part of plant cell wall forming gel matrix in which are embedded cellulose and hemicellulose. It is well known that pectin polymers form gel at low acidic pH less...
13 December 2017 956 4 View
I know that phthalocyanines require metalation to undergo intersystem crossing, therefore they can be used as efficient photosensitizers in PDT. I am wondering if the free-base phthalocyanine are...
04 November 2017 9,542 4 View
Dear researchers, What do you think about Roundup herbicide that caused cancer to a gardener who decided to take the chemical giant (Monsanto) to trial?? The jury agreed that Roundup contributed...
01 January 1970 7,022 28 View
