scholarly journals Physico-chemical properties of chicken nugget by addition gelatin from the skin and bones of goat with pretreatment L.plantarum and acetic acid

2021 ◽  
Vol 788 (1) ◽  
pp. 012097
Author(s):  
Hasma ◽  
E Abustam ◽  
R Malaka ◽  
M I Said
Keyword(s):  
Acetic Acid ◽  
Chemical Properties ◽  
Chicken Nugget ◽  
Physico Chemical

Synthesis and Physico-Chemical Properties of Zinc Layered Hydroxide-3-4-Dichlorohenoxy Acetic Acid (ZLH34D) Nanocomposite

2017 ◽  
Vol 744 ◽  
pp. 441-445
Author(s):  
Norhafiza Mohd Salleh ◽  
Siti Halimah Sarijo ◽  
Anizah Kalam
Keyword(s):  
Acetic Acid ◽  
Chemical Properties ◽  
Granular Structure ◽  
Basal Spacing ◽  
Aqueous Environment ◽  
Direct Reaction ◽  
Physico Chemical ◽  
Pure Phase ◽  
Zinc Layered Hydroxide ◽  
Dichlorophenoxy Acetic Acid

A herbicide, 3,4-Dichlorophenoxy acetic acid (34D) was successfully intercalated into the zinc layered hydroxide (ZLH) by direct reaction with zinc oxide (ZnO) to form a new organic-inorganic zinc layered hydroxide-3,4-Dichlorophenoxy acetate (Z34D) under an aqueous environment. The pH of the solution was adjusted to 7.5 using 2 M sodium hydroxide (NaOH). The pure phase and well-ordered was synthesized at 0.3 M Z34D. PXRD patterns show well-ordered nanohybrid material with basal spacing at 26.1 Å. The percentage loading of 34D in the Z34D is 57.5 % (w/w) calculated based on the percentage of carbon in the sample. FESEM shows the ZnO precursor has very fine granular structure and transformed into agglomerate structure when the nanohybrid are formed. This work shows that the nanohybrid of Z34D can be synthesized using simple, direct-reaction method.

scholarly journals ONE-POT-TWO-STEP SYNTHESIS OF BIOLUBRICANT BASE STOCK FROM RUBBER SEED OIL

2020 ◽  
Vol 45 (5) ◽  
Author(s):  
G.O . Madojemu ◽  
E.A. Elimian ◽  
M.C. Ejimadu ◽  
C.O. Okieimen ◽  
F.E. Okieimen
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Response Surface ◽  
Seed Oil ◽  
Chemical Properties ◽  
Base Stock ◽  
One Pot ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Physico Chemical

Biolubricant base stock was synthesized in this work from rubber seed oil in a one-pot-two-step process of epoxidation and hydroxylation. Rubber seed oil was extracted using a Soxhlet apparatus. The in situ epoxidation of the rubber seed oil with peracid (hydrogen peroxide and acetic acid) was analysed and optimized considering three process variables with their range of values given as temperature of 35-50 , time of 60-180 mins and mole ratio of hydrogen peroxide to acetic acid of 1:0.25-1:1 by applying the central composite design of response surface methodology. The ring opening reaction (hydroxylation) of the epoxide to polyhydroxylated oil (lubricant basestock) with ethanol was carried out using the optimum conditions obtained from the epoxidation process. The rubber seed oil, epoxide and lubricant basestock were characterized in terms of physico-chemical properties using standard methods and in terms of functional groups using Fourier Transform Infrared (FTIR) spectroscopy. Maximum epoxide content of 4.85% and maximum conversion of 71% of rubber seed oil to epoxide was achieved at a temperature of 50􀀀 , reaction time of 180 mins and 1: 0.39 mol/mol of hydrogen peroxide to acetic acid. The predicted values of the epoxidation process reasonably agreed with the experimental ones and model R-squared value of about 95% showed that response surface method can reasonably predict the epoxidation process using a quadratic polynomial model. There was 75% conversion of the epoxide to polyhydroxylated oil (biolubricant basestock), which represents a very high yield. The formation of epoxides and polyhydroxylated oil lead to modification (improvement) in the properties of rubber seed oil as confirmed by the physico-chemical properties and FTIR spectra analysis of the oil, epoxide and lubricant basestock. The study showed that chemical derivatives of rubber seed oils are an attractive, renewable, and ecofriendly alternative to mineral oils for lubricant formulations.

scholarly journals Physico-chemical properties of Chitosan films

2004 ◽  
Vol 2 (4) ◽  
pp. 638-647 ◽  
Author(s):  
Luminita Balau ◽  
Gabriela Lisa ◽  
M. Popa ◽  
V. Tura ◽  
V. Melnig
Keyword(s):  
Acetic Acid ◽  
Chemical Properties ◽  
X Ray Diffraction ◽  
Structural Investigations ◽  
Physico Chemical ◽  
Thermal Investigations ◽  
Fourier Transform Ir ◽  
Diffraction Peaks ◽  
Chitosan Films ◽  
Two Stages

AbstractChitosan films obtained by dry phase inversion were prepared from an aqueous solution of chitosan in acetic acid. The films, of thickness less than 20 μm, were transparent, very flexible and had smooth surfaces. Increasing the film thickness induced an increase of the internal tensions and the consequent formation of a rough surface. Structural investigations by X-ray diffraction and Fourier transform IR analysis, showed that the chitosan films, as prepared, are amorphous. Further annealing to evaporate acetic acid and water traces, changed the amorphous phase into a more ordered phase, characterized by diffraction peaks at 2θ values of 9, 17, 20 and 23 degrees. Thermal investigations by TG, DTG, and DTA revealed that the decomposition of the chitosan films as prepared proceeds in two stages, starting from 180°C and 540°C.

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

Physico-Chemical Properties of Recombinant Desulphatohirudin

1990 ◽  
Vol 63 (03) ◽  
pp. 499-504 ◽  
Author(s):  
A Electricwala ◽  
L Irons ◽  
R Wait ◽  
R J G Carr ◽  
R J Ling ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Gel Filtration ◽  
Chemical Properties ◽  
Alpha Helix ◽  
Apparent Molecular Weight ◽  
Correlation Spectroscopy ◽  
Nmr Studies ◽  
Recombinant Hirudin ◽  
Physico Chemical ◽  
Recombinant Molecule

SummaryPhysico-chemical properties of recombinant desulphatohirudin expressed in yeast (CIBA GEIGY code No. CGP 39393) were reinvestigated. As previously reported for natural hirudin, the recombinant molecule exhibited abnormal behaviour by gel filtration with an apparent molecular weight greater than that based on the primary structure. However, molecular weight estimation by SDS gel electrophoresis, FAB-mass spectrometry and Photon Correlation Spectroscopy were in agreement with the theoretical molecular weight, with little suggestion of dimer or aggregate formation. Circular dichroism studies of the recombinant molecule show similar spectra at different pH values but are markedly different from that reported by Konno et al. (13) for a natural hirudin-variant. Our CD studies indicate the presence of about 60% beta sheet and the absence of alpha helix in the secondary structure of recombinant hirudin, in agreement with the conformation determined by NMR studies (17)

Physico-chemical properties of the rare-earth metals, scandium, and yttrium

1963 ◽  
Vol 79 (2) ◽  
pp. 263-293 ◽  
Author(s):  
E.M. Savitskii ◽  
V.F. Terekhova ◽  
O.P. Naumkin
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Chemical Properties ◽  
Physico Chemical ◽  
The Rare Earth
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