Discrete optimizationproblems are often solved using "heuristics" (expert opinions deening how to solve a family of problems). The paper is about ways to speed up the search by combining several heuristics involving randomization. Using expert knowledge a prior distribution of optimization results as functions of heuristic decision rules is deened and is continuously updated while solving a par...

The classic Lossen rearrangement is a well-known reaction describing the transformation of an O-activated hydroxamic acid into the corresponding isocyanate. In this study, we found that chlorinated benzoquinones (CnBQ) serve as a new class of agents for the activation of benzohydroxamic acid (BHA), leading to Lossen rearrangement. Compared to the classic one, this new kind of CnBQ-activated Los...

The antioxidant effects of clove oil (CO) and clove oleoresin (COR) in two species of meat i.e. chicken and chevon during refrigerated storage (4±1°C) were investigated. The antioxidant potential (AOP) and radical scavenging activities were compared with natural (α-Tocopherol and L-ascorbic acid) and synthetic antioxidants (BHA and TBHQ). CO & TBHQ, BHA and COR and L-ascorbic acid and α-Tocophe...

K-anonymity is the most widely used approach to privacy preserving microdata which mainly based on generalization. Although generalization-based k-anonymity approaches can achieve protection objective, they suffer from information loss. Clustering-based have been successfully adapted for k-anonymization as enhance data quality, however, computational complexity of finding an optimal solution ha...

The study aimed to examine and compare the influence of adding synthetic antioxidant butylated hydroxyanisole (BHA), with two herbal medical plants (Oregano germander) on broiler gut microflora, its immunity. One hundred forty broilers were raised for three weeks distributed into five treatment groups. prepared dietary treatments included (w/w):1). Control (without supplement) 2). Germander (GE...

Abstract The ultra-high pressure-assisted extraction (UHPE) of total phenols from Eucommia ulmoides leaves (TPEU) was optimized and its antioxidant activity on seed oil studied. effects UHPE pressure, time, ethanol concentration the yield TPEU were examined by response surface methodology. In addition, added to oil, (acid value, peroxide value) during storage optimal conditions as follows: 406 ...

Observable significant revisit of ancient approach to prophylaxis and anaphylaxis (herbaltherapy), though with modern dimensions of study envelopes our world of research today. Reports on the medicinal use of parts of Psidium guajava (Myrtaceae), including leaves and stem barks have been reported in, and beyond Africa. Air dried leaves of P. guajava were powdered and extracted with 95%v/v metha...

Compoundswith two phenolic OH groups like curcumin possess efficient antioxidant and anti-inflammatory activity. We synthesized p-cresol dimer (2,2'-dihydroxy-5,5'-dimethylbiphenol, 2a) and p-methoxyphenol dimer (2,2'-dihydroxy-5,5'-dimethoxybiphenol, 2b) by ortho-ortho coupling reactions of the parent monomers, p-cresol (1a) and p-methoxyphenol (1b), respectively. Their antioxidant activity wa...

Brown humic acids (BHAs) constitute the most polar and soluble fraction of humic acids. Their colloidal character and their high number of functional surface groups justify their higher reactivity as against metallic cations with respect to other humic fractions (i.e., gray humic acids and humins). The aim of this work is to study the retention mechanisms of Cu(II), Ni(II), and Co(II) on a BHA ...

Dietary antioxidants protect laboratory animals against the induction of tumors by a variety of chemical carcinogens. Among possible media nisms, protection against chemical cardnogenesis could be mediated via antioxidant-dependent induction of detoxifying enzymes. Therefore, we investigated the effects of two commonly used food preservatives, butyl ated hydroxyanisole (BHA) and butylated hydro...