This research focuses on an environmental and economic aspect, as it depends on using the harmful water hyacinth weed as an effective material to product the biopolymer "polyhydroxybutyrate: PHB" by Bacillus subtilis. The samples were processed and d
igested to extract the polymer polyhydroxybutyrate (PHB) using chloroform method. Some tests were carried out to confirm the identity of this polymer, such as measuring the melting point of the product and studying the functional groups of the extracted PHB using the Fourier-transform infrared spectroscopy (FTIR). The results obtained by the extracted polymer from the water hyacinth weed showed conformity to the referential PHB polymer tests, which shows the importance of this research in determining a way to get rid of this harmful weed, which is an environmental problem and a large economic burden by investing it in the production of biopolymer PHB.
Many chemical compounds (bases, inorganic acids, salts) have been used to find a suitable
solvent for vanadium oxide And determine optimal conditions for its Dissolution.The best
of them was sodium hydroxide at 2M concentration. The solubility was
100% at 90 °C and
the solubilitys time was 30 min. The number of motor cycles was 800 cycles / min and the
liquid / solid ratio was 200 g / L.
In addition,the best amino protonadted compounds were used to precipitate vanadates from
their solutions (monoethanolamine, diphenylamine, hydrazine, hydroxide amine
hydrochloride, urea) with several inorganic acids (HCl, H2SO4, HNO3) and 1: 1 acid/base
was monoethanolamine protonated with concentrated sulfur acid .
The study addresses the synthesis of two organic phosphoric compounds that have
the P-NH-c bridge, They have the following chemical formula (PhO)2P(O)-NH-C(CH3)=CHCN
( abbreviated as PCNO) and The compound (abbreviated as PCNS) The compound
were s
ynthesized in the center of acetonitrile and having a strong base of sodium hydride
NaH by Diphenyl chloro phosphate (PhO)2POCl compounds and Diphenyl chloro thio
phosphate (PhO)2PSCl compound Respectively . Some of the physical and chemical
properties of the synthetic composites, such as the melting point, dissolution , and the
withdrawal of some important spectra such as the IR spectra and the NMR spectra were
used in the extraction of the copper(II) Ions from the of medium sulphates, Lesson of
Partition Coefficient Copper Dcu between aqueous medium of organic medium containing
different concentrations of organic phosphorus compounds prepared previously. Partition
Coefficient copper(II) ion distribution was studied in terms of the change in the value of
PH (PH = 4 --- 6) at the constant concentration of the extract used previously .The
Spectrophotometer for calculating copper concentrations was used Depending on absorption ,
and the two previous components were compared .
Aseries of Schiff base and their derivative (fluorene) have been synthesized primary
amines was condensed with 2-acetyl fluorene in DMF (dimethyl formamide) in the
presence of conc. HCl acid as catalyst to yield the Schiff base (1). The Schiff base
(2,3)
and (4) were prepared from the reaction of Schiff base (1) with 2-hydroxy-5-methyl-1,3-
benzenedicarboxaldehyde and 2,5-dihydroxy benzaldehyde respectively. and The Schiff’s
base (4) was treated with monochloroacetyl choride to give 1- substituted-4(2-fluorenyl)-3-
chloro Azolidine-2-on (5).
We have synthesized some new compounds from 2-Acetyl Fluorene\ Thiophene
2-carbaldehyde chalcone via condensation and cyclization reactions between the chalcone and each of thiourea and urea, hydroxylamine hydrochloride and hydrazine hydrate, these
reactions afford these compounds:
3-(2-fluorenyl)-5-(2-thienyl) pyrazoline(4), 3-(2-fluorenyl)-5-(2-thienyl) Isoxazoline(3), 4-(2-fluorenyl)-6-(2-thienyl) pyrimidinone-2 (2) and 4-(2-fluorenyl)-6-(2-thienyl) pyrimidine-2 tione (1). Also 3-(2-fluorenyl)-5-(2-thienyl) isoxazole (5), were prepared via bromination of chalcon and cyclization the later with hydroxylamine hydrochloride.
Identification and determination of compounds structurs were carried out by (IR,
1H-NMR, 13C-NMR, LC-MS) spectrum Analysis.
اصطناع الجمل الثنائية المكونة من ثنائي أكسيد الزركونيوم مع كل من ( أكسيد الكالسيوم- أكسيد المغنيزيوم ) بطريقة الترسيب المشترك ودراسة بنيتها وخواصها
مساهمة في تحسين ثباتية فيتامين C في المستحضرات الجلدية: قمنا في هذا البحث بدراسة الثباتية الكيميائية للفيتامين C أو حمض الأسكوربيك في مستحضرات جلدية موضعية بتراكيز 2%
A openchained Bispyridyl ether has been synthesized using ٢،٢- bis
[٢-cyanoethoxy]- diethylether as an intermediate from the reaction of
acrylonitrile with Diethylene glycol
The heterocyclization of ٢،٢- bis [٢-cyanoethoxy]- diethylether and
acet
ylene catalyzed by cyclopentadienyl-١،٥-cis,cis-cyclooctadiene-cobalt(I)
and light has been studied in toluene as solvent.
The Nitrile gave results of interest in the preparation of the openchained
bispyridyl ether compound ٢,٢-bis [٢-pyridylethoxy]-deithylether.
