slow sand filters are as a proper technology for pre-treatment of raw water, with a fine and medium trubidity in small communities in developing countries. thus, with a minimum operation cost and minimum need for expest bodies have the maximum efficiency. the purpose of this research is carried out to evaluate the efficiency of two processes of horizontal flow roughing filter and vertical flow ...

F) were purchased from Gelest Inc (Morrisville, PA). All chemicals were used as received without further purification. Paper (Gel Blot paper, Whatman#1, and Whatman#50) was purchased from GE Healthcare (NJ, USA) and used as received, without purification. The silanization reaction was conducted in a chamber with a volume of 0.01 m 3 at a temperature set at 95 °C. The silanizing reagent is trans...

A 2 x 2 cross-classified experiment was conducted to investigate the effect of age of equine embryo (7 vs 8 d postovulation) and method of transfer (surgical vs nonsurgical) on pregnancy rates at 50 d of gestation. Embryos were recovered 7 or 8 d postovulation using a Foley catheter and 3 liters of modified Dulbecco's phosphate-buffered saline (PBS). Upon identification, the embryos were placed...

INTRODUCTION Human enteroviruses represent the most common etiological agents of aseptic meningitis. Rapid diagnosis of aseptic meningitis affects the management of patients. OBJECTIVE The aim of this work was to assess the efficacy of rapid antigen detection (RAD) assay for the confirmation of human enteroviruses in comparison to that of the conventional cell culture (CCC), and to identify t...

The use of the membrane filter in bacteriological water analysis was initiated by Goetz and Tsuneishi (J. Am. Water Works Assoc., 43, 943, 1951). It is being applied principally for the detection of Escherichia coli. Kabler and Clark (Am. J. Public Health, 42, 390, 1952) found this method useful also for the recovery of Salmonella typhosa from water but there has been no report on the utilizati...

A new, inexpensive filtration device for the diagnosis of urinary schistosomiasis was tested against the commonly used Millipore device. The experimental protocol was performed with 25 urine samples known to be positive for Schistosoma haematobium. The results suggest that the new device is as effective as the Millipore device for the diagnosis of urinary schistosomiasis. Its low cost will be a...

Microplastics are plastic particles less than 5 mm in diameter. These plastics mostly result from degradation of larger plastics. Due to their small size, they often accidentally ingested by sea faunas, particularly the deposit and filter feeders. However, information on ingestion microplastics fauna such as jellyfish is rare. This paper provides evidence jelly fishes (Crambionella orsini) alon...

During the differentiation of human enterocytes, the secretion of apolipoprotein B is switched from the apoB-100 form seen almost exclusively in fetal cells to the apoB-48 form seen almost exclusively in adult cells. This switch is accomplished by the post-transcriptional editing of the messenger RNA for apoB-100. We report that a similar switch occurs during the differentiation of the human co...

In this paper, first we study the semi maximal filters in linear $BL$-algebras and we prove that any semi maximal filter is a primary filter. Then, we investigate the radical of semi maximal filters in $BL$-algebras. Moreover, we determine the relationship between this filters and other types of filters in $BL$-algebras and G"{o} del algebra. Specially, we prove that in a G"{o}del algebra, any ...