FIELD EXPERIENCE WITH ANTIBAC. A NEW TYPE OF CHLORINE SANITIZER

1953 ◽  
Vol 16 (2) ◽  
pp. 61-65 ◽  
Author(s):  
Leslie R. Bacon ◽  
Alfred L. Sotier ◽  
Armin A. Roth
Keyword(s):  
Adverse Effects ◽  
Cold Water ◽  
Active Agent ◽  
Resistant Bacteria ◽  
Low Density ◽  
Performance Tests ◽  
Food And Beverage ◽  
New Type ◽  
Ph Range ◽  
Total Bacteria

A new type of chlorine-liberating germicide designed to provide sanitizing solutions in the pH range of 5.8 to 7.0 has been introduced under the name of Wyandotte Antibac. This new germicide is a white, low-density powder based on 1,3-dichloro-5,5-dimethylhydantoin as the active agent and contains 16 percent available chlorine. Data obtained from performance tests in food and beverage serving establishments in several cities show that Antibac is an outstanding sanitizer for eating and drinking utensils. In germicidal performance it is comparable to sodium hypochlorite but its action on the skin is much milder. The material is rapidly and completely soluble in hot or cold water and shows excellent wetting and rinsing behavior. Other favorable characteristics found are a lesser retention of chlorous odor by sanitized vessels and no adverse effects on the foaming of beverages. After the introduction of Antibac for the sanitization of farm dairy utensils in unsupervised tests a considerable reduction in total bacteria counts in the milk and a very notable reduction in heat-resistant bacteria counts were found.

Ab initiostructure solution by iterative phase-retrieval methods: performance tests on charge flipping and low-density elimination

2010 ◽  
Vol 43 (1) ◽  
pp. 89-100 ◽  
Author(s):  
Frank Fleischer ◽  
Thomas Weber ◽  
Sofia Deloudi ◽  
Lukáš Palatinus ◽  
Walter Steurer
Keyword(s):  
Figure Of Merit ◽  
Phase Retrieval ◽  
Periodic Structures ◽  
Correction Term ◽  
Low Density ◽  
Performance Tests ◽  
Acta Cryst ◽  
Model Independent ◽  
Novel Model

Comprehensive tests on the density-modification methods charge flipping [Oszlányi & Sütő (2004).Acta Cryst.A60, 134–141] and low-density elimination [Shiono & Woolfson (1992).Acta Cryst.A48, 451–456] for solving crystal structures are performed on simulated diffraction data of periodic structures and quasicrystals. A novel model-independent figure of merit, which characterizes the reliability of the retrieved phase of each reflection, is introduced and tested. The results of the performance tests show that the quality of the phase retrieval highly depends on the presence or absence of an inversion center and on the algorithm used for solving the structure. Charge flipping has a higher success rate for solving structures, while low-density elimination leads to a higher accuracy in phase retrieval. The best results can be obtained by combining the two methods,i.e.by solving a structure with charge flipping followed by a few cycles of low-density elimination. It is shown that these additional cycles dramatically improve the phases not only of the weak reflections but also of the strong ones. The results can be improved further by averaging the results of several runs and by applying a correction term that compensates for a reduction of the structure-factor amplitudes by averaging of inconsistently observed reflections. It is further shown that in most cases the retrieved phases converge to the best solution obtainable with a given method.

scholarly journals Antibacterial activity of ginger extracts and its essential oil on some of pathogenic bacteria

2010 ◽  
Vol 7 (3) ◽  
pp. 1159-1165
Author(s):  
Baghdad Science Journal
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Essential Oil ◽  
Pathogenic Bacteria ◽  
Cold Water ◽  
Water Extract ◽  
Ethanolic Extract ◽  
Hot Water ◽  
Diffusion Method ◽  
Resistant Bacteria

The antimicrobial activity of ginger extracts ( cold-water, hot-water, ethanolic and essential oil ) against some of pathogenic bacteria ( Escherichia coli , Salmonella sp , Klebsiella sp , Serratia marcescens, Vibrio cholerae , Staphylococcus aureus , Streptococcus sp) was investigated using Disc diffusion method , and the results were compared with the antimicrobial activity of 12 antibiotics on the same bacteria . The results showed that the ginger extracts were more effective on gram-positive bacteria than gram-negative . V. cholerae and S. marcescens,were the most resistant bacteria to the extracts used , while highest inhibition was noticed against Streptococcus sp (28 mm) . The ethanolic extract showed the broadest antibacterial activity ( 11 to 28 mm ) , in comparison with moderate activity of essential oil , it was observed that the cold-water extract was more effective on the bacteria than hot-water extract . Ginger ethanolic extract presented higher diameter of inhibition zone for Streptococcus sp than in Ciprofloxacin , Cefotaxime , Cefalotin , Cephalexin and Cephaloridine , also it was found a similarity between the higher inhibition zones of ethanolic extract of ginger and some antibiotics for S. aureus , E. coli , Salmonella sp and Klebsiella sp . V. cholerae and S. marcescens,also highly resistant to antibiotics . Phytochemical analysis of ethanolic extract of ginger revealed the present of glycosides, terpenoids, flavonids and phenolic compounds

scholarly journals Investigation of Unsteady Pressure Pulsation in New Type Dishwasher Pump with Special Double Tongue Volute

2022 ◽  
Vol 2022 ◽  
pp. 1-11
Author(s):  
Jinfeng Zhang ◽  
Yilei Zhu ◽  
Yalin Li ◽  
Ping Huang ◽  
Hui Xu ◽  
...  
Keyword(s):  
Pressure Pulsation ◽  
Rotation Speed ◽  
Performance Tests ◽  
Unsteady Pressure ◽  
Passive Rotation ◽  
Impeller Outlet ◽  
Tongue Position ◽  
New Type ◽  
Reference Scheme ◽  
Blade Frequency

Through numerical simulations, this work analyzes the unsteady pressure pulsation characteristics in new type of dishwasher pump with double tongue volute and single tongue volute, under volute static and rotation conditions. Likewise, the performance tests were also carried out to verify the numerical results. Multiple monitoring points were set at the various positions of new type dishwasher pump to collect the pressure pulsation signals, and the relevant frequency signals were obtained via Fast Fourier Transform, to analyze the influence of volute tongue and its passive speed on the pump performance. The results reveal that when the double tongue volute is stationary, the pressure pulsation amplitudes increase from the impeller inlet to the impeller outlet. Under the influence of shedding vortex, the pressure pulsation in the lateral region of tongue becomes disorganized, and the main frequency of pressure pulsation changes from blade frequency to shaft frequency. In addition, compared with the static volute, double tongue volute can effectively guide the water flow out of the tongue during the rotation process, thus ensuring good periodicity for pressure pulsation in the tongue region. Accordingly, a volute reference scheme with passive rotation speed is proposed in this study, which can effectively improve the pressure pulsation at tongue position, and provides a new idea for rotor-stator interference to guide the innovation of dishwasher.

Kinetics of Chromium Ion Removal from Wastewater with Internal Circulation Foam Flotation

2013 ◽  
Vol 742 ◽  
pp. 384-387 ◽  
Author(s):  
De Jin Wang ◽  
Na Lin
Keyword(s):  
Chemical Reaction ◽  
Active Agent ◽  
Foam Fractionation ◽  
Foam Separation ◽  
Ion Removal ◽  
Fractionation Column ◽  
Foam Flotation ◽  
Reaction Constant ◽  
New Type ◽  
Reaction Processes

A new type of foam fractionation column with spiral internal had been designed for enhancing the foam drainage and thus for the removal of minute hazardous materials. Chromium was separated from wastewater using the continuous foam separation method. According to the similar physical behavior of foam separation and chemical reaction processes, the equivalent chemical reaction constant was introduced, Establishment concentrate distributed mathematical model of the whole tower under the condition of continuous foam separation with SDS as active agent. The model has been tested by experiments. The result indicated that foam separation process could be regarded as a first order reaction, and diffusion coefficient was 4.86cm2/s.

scholarly journals Bioprospecting Staphylococcus Phages with Therapeutic and Bio-Control Potential

Viruses ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 133 ◽  
Author(s):  
Joseph M. Ochieng’ Oduor ◽  
Ermir Kadija ◽  
Atunga Nyachieo ◽  
Marianne W. Mureithi ◽  
Mikael Skurnik
Keyword(s):  
Phage Particle ◽  
Burst Size ◽  
Radiation Energy ◽  
Resistant Bacteria ◽  
Antibiotic Resistant ◽  
Rna Ligase ◽  
The Public ◽  
Ph Range ◽  
Host Metabolism

Emergence of antibiotic-resistant bacteria is a serious threat to the public health. This is also true for Staphylococcus aureus and other staphylococci. Staphylococcus phages Stab20, Stab21, Stab22, and Stab23, were isolated in Albania. Based on genomic and phylogenetic analysis, they were classified to genus Kayvirus of the subfamily Twortvirinae. In this work, we describe the in-depth characterization of the phages that electron microscopy confirmed to be myoviruses. These phages showed tolerance to pH range of 5.4 to 9.4, to maximum UV radiation energy of 25 µJ/cm2, to temperatures up to 45 °C, and to ethanol concentrations up to 25%, and complete resistance to chloroform. The adsorption rate constants of the phages ranged between 1.0 × 10−9 mL/min and 4.7 × 10−9 mL/min, and the burst size was from 42 to 130 plaque-forming units. The phages Stab20, 21, 22, and 23, originally isolated using Staphylococcus xylosus as a host, demonstrated varied host ranges among different Staphylococcus strains suggesting that they could be included in cocktail formulations for therapeutic or bio-control purpose. Phage particle proteomes, consisting on average of ca 60–70 gene products, revealed, in addition to straight-forward structural proteins, also the presence of enzymes such DNA polymerase, helicases, recombinases, exonucleases, and RNA ligase polymer. They are likely to be injected into the bacteria along with the genomic DNA to take over the host metabolism as soon as possible after infection.

scholarly journals In-motion Alignment of a Low-cost GPS/INS under Large Heading Error

2014 ◽  
Vol 68 (2) ◽  
pp. 355-366 ◽  
Author(s):  
Burak H. Kaygısız ◽  
Bekir Şen
Keyword(s):  
Global Positioning System ◽  
Inertial Navigation System ◽  
Low Cost ◽  
Positioning System ◽  
Performance Tests ◽  
Alignment Procedure ◽  
Attitude Error ◽  
Global Positioning ◽  
New Type ◽  
Navigation Accuracy

This paper presents a new type of Global Positioning System/Inertial Navigation System (GPS/INS) providing higher navigation accuracy under large initial heading error. The mechanization introduced is applicable to low cost GPS/INS systems and enhances the performance when the heading error is large. The proposed approach has the capability to decrease large heading errors very quickly and can start the strapdown navigation computations under poor heading accuracy without any special alignment procedure. Although the design is applicable to land, sea and aerial vehicles, a land vehicle is used for the performance tests. The test is conducted around a closed path and the proposed system is compared to a GPS/INS system based on small attitude error assumption. The performance of both systems is given in this paper.

scholarly journals Indoor performance tests of a new type solar still. The tilted-tray, wick type solar still with a condenser room.

1996 ◽  
Vol 8 (1/2) ◽  
pp. 57-59
Author(s):  
Fujio SUDA ◽  
Noriko MIYAMOTO ◽  
Nozomi SASAKI
Keyword(s):  
Performance Tests ◽  
Solar Still ◽  
New Type

ANTIBAC — A NEW TYPE OF CHLORINE SANITIZER*

1952 ◽  
Vol 15 (6) ◽  
pp. 285-293 ◽  
Author(s):  
Leslie R. Bacon ◽  
Alfred L. Sotier
Keyword(s):  
Preliminary Data ◽  
Storage Stability ◽  
Active Agent ◽  
Great Promise ◽  
Organic Loading ◽  
Ph Adjustment ◽  
Adverse Conditions ◽  
New Type ◽  
Effects Of Temperature

The germicidal performance of Anti-bac, a newly developed preparation based on the active agent 1,3-dichloro-5, 5-dimethylhydantoin, has been tested by several methods. The activity is of the same order as shown by hypochlorite preparations, and is superior under the adverse conditions of organic loading. Preliminary data are given for the effects of temperature and pH adjustment on performance, and on storage stability and action on metals. Antibac shows great promise for general disinfection and sanitation service, and in view of its combination of high germicidal activity and excellent resistance to depreciation may be used to advantage in fields hitherto dominated by hypochlorites.

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