Method comparison studies of two different methods for the analysis of weak acid dissociable (WAD) cyanide revealed analytical flaws and/or matrix interference problems with both procedures. EPA "draft" method 1677 using a Perstorp 3202 CN analyzer was compared to Standard Method 4500 CN I. It was discovered that the Perstorp analyzer produced more precise and more accurate results once appropr...

In this paper, the phenomenon of electronic retailing is examined. Elements that make e-tailing especially attractive to consumers are highlighted. It is argued that traditional retailers have to critically consider the migration to a digital domain, and address challenges that might impede a smooth transition. Conversely, e-tailers have much to learn from their counterparts in the physical wor...

With the global demand for economically important metals increasing, compounded by depletion of readily accessible ores, secondary resources and low-grade ores are being targeted to meet growing demands. Novel technologies developed within biobased industries, such as microbial biosurfactants, could be implemented improve sustainability traditional hydrometallurgy techniques. This study investi...

This study aims to realize the resource regeneration application of copper tailing (as fine aggregates for partial replacement natural aggregates), which avoid environmental pollution due many landfills tailings. The compressive strength and durability (dry shrinkage sulfate attack) tests were carried out evaluate effect tailings on performance mortar. results show that mortar with has higher t...

Global situations such as economic recovery after a pandemic, geopolitical instability, and future digital energy transition are some of the drivers for European Union (EU) to explore new existing sources raw materials. The Iberian Pyrite Belt in southwest Peninsula (Spain Portugal) hosts great number tailing deposits from centuries mining operations. A unique tailings deposit has been studied ...

An integrated approach to temperature-controlled chromatography, involving copolymer modified agarose adsorbents and a novel travelling cooling zone reactor (TCZR) arrangement, is described. Sepharose CL6B was transformed into a thermoresponsive cation exchange adsorbent (thermoCEX) in four synthetic steps: (i) epichlorohydrin activation; (ii) amine capping; (iii) 4,4'-azobis(4-cyanovaleric aci...

This scientific review presents the processes of regulation miRNA content. To write article, information was searched using Scopus, Web Science, MedLine, PubMed, Google Scholar, EMBASE, Global Health, The Cochrane Library, CyberLeninka databases. article characteristics microRNA editing and tailing, which regulate content through transcription control. It is emphasized that most important mecha...

We have tested conditions for the labeling and tailing the 3'-end of RNAs with yeast poly(A) polymerase. Conditions were optimized for addition of NTP, dNTP, or ddNTP nucleotides to RNA. ATP, GTP, and UTP were useful for adding homopolymer tracts of various lengths. The nonradioactive nucleotides biotin-N6-ATP and digoxigenin-11-UTP also were used efficiently.

Double-stranded DNA molecules complementary to ovalbumin chicken messenger RNA were synthesized in vitro and integrated into the E. coli plasmid pCR1 using an oligodG-dc tailing procedure. The resultant hybrid plasmids, amplified by transfection of E. coli, were shown by hybridization and gel electrophoresis to contain extensive DNA sequences of the ovalbumin structural gene.

This research aims to analyze the impact of sodium tripolyphosphate (STPP) as a rheological modifier concentrated kaolin slurries in seawater at pH 8, which is characteristic copper sulfide processing operations. The dispersion phenomenon was analyzed through chord length measurements using focused beam reflectance measurement (FBRM) technique, complementing size distributions unweighted and sq...