A main obstacle in manufacturing the TWIRL device for realizing the sieving step of the Number Field Sieve is the sophisticated chip layout. Especially the logic for logging and recovering large prime factors found during sieving adds significantly to the layout complexity. We describe a device building on the Elliptic Curve Method (ECM) that for parameters of interest allows to replace the com...

Carbon-enriched fractions have been obtained from two coal fly ash (FA) samples. The FA came from two pulverized-coal fired power stations (Lada and Escucha, Spain) and were collected from baghouse filters. Sieving was used to obtain carbon-enriched fractions, which were further subjected to two beneficiation processes: acid demineralization using HCl and HF, and oil agglomeration using soya oi...

Mertens (1997) defined physically effective NDF (peNDF) as the fraction of NDF that stimulated chewing and contributed to a ruminal digesta mat. He also proposed a standard laboratory method for measuring peNDF that involved dry sieving and measuring the fraction of sample NDF retained on the ≥1.18-mm sieve. This large particle pool requires rumination and has a high resistance to escape from t...

The small size of Na(+) and Cl(-) ions provides a bottleneck in desalination and is a challenge in providing alternatives for continuously depleting fresh water resources. Graphene by virtue of its structural properties has the potential to address this issue. Studies have indicated that use of monolayer graphene can be used to filter micro volumes of saline solution. Unfortunately it is extrem...

Microfluidic design has advanced existing protein separation capabilities and supported novel assays. Key metrics for successful protein separations include fast, robust, and sensitive analysis of complex mixtures of bio-macromolecules. Attaining high separation resolution is a chief concern. Here we review recent advances in polymer-based electrophoresis sieving materials that are impacting mi...

We have seen that with a few modifications, the basic combinatorial idea behind the sieve of Eratosthenes can be used to get a fairly accurate count of the number of integers in [1, x] free of prime factors p ≤ y, provided that y ≤ x log log . We now state a more general sieving problem and check that the ideas we developed can be carried over to it. The following notation is typical of sieve m...

The sieving characteristics of the normal and inflamed rectal mucosa are studied in three healthy volunteers and five patients with ulcerative colitis. Following rectal instillation of (125)I-polyvinylpyrrolidone (PVP), the molecular size distribution of labelled PVP in urine samples was determined by Sephadex gel filtration. The results of the study suggest that the increased permeability of t...

A robust and sustainable thin-film composite membrane, using green raw materials on a highly porous, electrospun biodegradable support, was developed for molecular sieving.

A simple and inexpensive cell dissociation sieve-tissue grinder apparatus consisting essentially of stainless steel sieve (the one popularly used for sieving tea leaves) and a glass syringe plunger acting as pestle, is described for making single cell suspension.

Denatured proteins were separated in free solution on a microfluidic chip without any sieving matrix after carrying out the denaturation with a mixture of alkyl sulfates with different carbon chain lengths.