Naturally occurring arsenic in groundwater in Cambodia is a serious health concern. This study tested the efficacy of a BioSand filter amended with iron nails, Kanchan filter, as a household water treatment option with three natural arsenic-bearing groundwater sources of varying compositions and spiked with lab cultured E. coli and MS2. The effectiveness of arsenic and pathogen removal was not ...

the aim to achieve in this study is to recover the cr(iii) and process waters used in thewastewaters of chrome tanning operation by membrane process during leather production. in the treatmentalternative contains, cartridge filter, nanofiltration (nf(np10)), nanofiltration nf(xn45) and reverse osmosisro(acm2) membranes. the raw chrome wastewater from the cartridge filter was given to nf(np10)me...

We consider the filter generator over GF (2) consisting of a linear feedback shift register of length k that generates a maximal length linear sequence of period 2 − 1 over GF (2) and a Boolean function of degree d that combines bits from one element in the shift register (considered as an element in GF (2)) and creates a binary output bit zt at any time t. We show how to extend a recent attack...

EPA Method 1615 was developed with a goal of providing a standard method for measuring enteroviruses and noroviruses in environmental and drinking waters. The standardized sampling component of the method concentrates viruses that may be present in water by passage of a minimum specified volume of water through an electropositive cartridge filter. The minimum specified volumes for surface and f...

Superconvergence of discontinuous Galerkin methods is an area of increasing interest due to the ease with which higher order information can be extracted from the approximation. Cockburn, Luskin, Shu, and Süli showed that by applying a B-spline filter to the approximation at the final time, the order of accuracy can be improved from O(hk+1) to O(h2k+1) in the L2-norm for linear hyperbolic equat...

in this article, the effect of cells' radius on the behavior of wavelength switching optical filter andthe effect of the radius of the optical filters' key characteristics such as wavelength resonance onan optical filter based on photonic crystals, have been investigated. currently, the most commonapplied mechanism for designing optical filter based on photonic crystals is using twome...

Normal human urine cannot be forced through a 0.2 pm filter. To investigate the reason for this phenomenon, uromucoid (Tamm-Horsfall protein) was purified from human urine and its capacity to block a 0.2 pm Millipore filter was measured under different conditions. In the presence of cations (H+, Na+, Ca’“) uromucoid blocked the filter. The blocking varied with cation concentration. Scanning ele...

The epithelium lining the mouse larynx occupied the transitional zone between the keratinized stratified squamous epithelium lining the oral cavity and the ciliated columnar one continuing to the trachea. The epithelium showed gradations ranging from stratified squamous through stratified cuboidal to ciliated stratified low-columnar type. It is suggested that the epithelium is identical with th...

At 12.8 MHz center frequency, the advanced miniaturized polymer-based planar high quality factor (Q) passive elements embedded bandpass filter works in L-band. Because most of demands operate inside spectrum, wideband or high-speed operation necessary to enhance must be acquired microwave frequency ranges. The channel has a quiet, high-performance microfilter with rejection. Capacitors and indu...

Filters are two-port networks that may pass or attenuate frequencies within defined ranges and can alter the frequency response of any system. In present research study, goals optimization controller embedded with (ADS2019) used to design Butterworth Elliptic bandpass filters (18GHz – 38GHz), a bandwidth (7GHz), stopband attenuation (S21=-60dB), passband (S21=-1dB). Three types each filter (Hp-...