Microbial production of citric acid was performed by Yarrowia lipolytica NBRC 1658 and a domestic strain in the media containing glucose or fructose as substrates. The study was carried out in a batch system. The non-competitive substrate inhibition model was proposed for growth of the yeasts in both substrate media. Higher dry mass and lower Ks values were obtained in glucose media when compar...

Carbon materials, such as graphene nanoflakes, carbon nanotubes, and fullerene, can be widely used to store hydrogen, doping these materials with lithium (Li) generally increases their H2-storage densities. Unfortunately, Li is expensive; therefore, alternative metals are required realize a hydrogen-based society. Sodium (Na) an inexpensive element chemical properties that similar those of lith...

The activity of highly purified pyrophosphate:fructose-6-phosphate 1 -phosphotransferase (PFP) from barley (Hordeum vulgare) leaves was studied under conditions where the catalyzed reaction was allowed to approach equilibrium. The activity of PFP was monitored by determining the changes in the levels of fructose-6phosphate, orthophosphate, and fructose-1,6-bisphosphate (Fru1,6-bisP). Under thes...

The amplituhedron \(\mathcal{A}_{n,k,m}\) was introduced by Arkani-Hamed and Trnka (2014) in order to give a geometric basis for calculating scattering amplitudes planar \(\mathcal{N}=4\) supersymmetric Yang-Mills theory. It is projection inside the Grassmannian \(\text{Gr}_{k,k+m}\) of totally nonnegative part \(\text{Gr}_{k,n}\). Karp Williams (2019) studied \(m=1\) \(\mathcal{A}_{n,k,1}\), g...

Let R = Zq + uZq, where q = p and u = 0. In this paper, some structural properties of cyclic codes and quasi-cyclic (QC) codes over the ring R are considered. A QC code of length ln with index l over R is viewed both as in the conventional row circulant form and also as an R[x]/(x − 1)-submodule of GR(R, l)[x]/(x − 1), where GR(R, l) is the Galois extension ring of degree l over R. A necessary ...

1. Preincubation of partially purified rat liver L-type pyruvate kinase at 250 for 10min. causes amarked increase in co-operativity with respect to both the substrate, phosphoenolpyruvate, and the allosteric activator, fructose 1,6-diphosphate. 2. The results are consistent with the existence of two forms of liver L-type pyruvate kinase, designated forms LA and LB. It is postulated that form LA...

Rare sugars, referred to as monosaccharides and their derivatives that rarely exist in nature, can be applied in many areas ranging from foodstuffs to pharmaceutical and nutrition industry, or as starting materials for various natural products and drug candidates. Unfortunately, an important factor restricting the utilization of rare sugars is their limited availability, resulting from limited ...

Introduction Recently, fructose consumption has been suggested to be one of the environmental factors contributing to the development of insulin resistance, obesity, dislipidemia and other abnormalities of the metabolic syndrome. Aim Herbal extracts with established therapeutic efficiency in patients with obesity and diabetes have been traditionally used in Bulgarian ethnomedicine.This study in...

In this study, we investigated the ability of N-acetyl cysteine (NAC) to alleviate metabolic disorders in fructose-induced syndrome (MS) male rats and examine its protective effect on aortic cardiac tissues via influence cardiotrophin-1 (CT-1) expression. NAC (20 mg/kg b.w./day) was administered fructose induced MS animals for 12 weeks. Chronic consumption (20% w/v) increased body weight gain, ...

Effect of surface roughness on corrosion behavior for carbon steel was coated by metallic layers Cu- Ni Reinforced with Gr layers. Surface finishing P320, P600 and P1200 mesh used until a mirror shiny before at consecrations 0.25, 0.5, 1and 2 g/l Gr. First, X-ray diffraction), electron microscopy associated & Microscopic test specimens. The techniques were performed to study the effect sali...