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Pocket Purifier Research and Test Results

Pocket Purifier



Research and Studies of Disinfectant Performance of
UV-C Bulb for “Pocket Purifier” Handheld Light



The Lighting Principle of UV-C Lamp----


z   UV-C fluorescent lamp produces λ=253.7nm ultraviolet rays, are made of ordinary glass, through which UV rays can not radiate but be absorbed by fluorescent powder to change into visible light. While UV germicidal lamps
are made of quartz glass or special glass through which UV rays can penetrate.

Germicidal Ultraviolet Effectiveness




Principle and Character of Disinfection

z   Germicidal ultraviolet (UVC) light kills cells by damaging their DNA. The light initiates a reaction between two molecules of thymine, one of the bases that make up DNA. UV light at this wavelength (shortwave UV or UVC) causes adjacent thymine molecules on DNA to dimerize. The resulting thymine dimer is very stable. If enough of these defects accumulate on a microorganism's DNA its replication is inhibited, thereby rendering it harmless.


z   Ultraviolet photons harm the DNA molecules of living organisms in different ways. In one common damage event, adjacent bases bond with each other, instead of across the "ladder". This makes a bulge, and the distorted DNA molecule does not function properly.

z   The longer the exposure to UVC light, the more thymine dimers are formed in the DNA. If cellular processes are disrupted because of DNA damage, the cell cannot carry out its normal functions. If the damage is extensive and widespread, the cell will die.

z   Ultraviolet radiation in the 200-300 nanometer (nm) range is extremely effective in killing microorganisms such as airborne and surface bacteria, viruses, yeasts, and molds without second time pollution.



z   The typical model contain germ or bacteria (more than 18 kinds), for example, Fecal coli form, Bacillus, Escherichia coli, Kluyvera ascorbata, Tuberculosis, Neisseriaceae, Salmonellosis...etc., fungi (more than 8 kinds), for example: Penicillium, Black Fungi, Hair fungi, big muck fungi etc., virus (more than 10 kinds), for example: Hepatitis virus, flue virus, polio virus, poliomyelitis (Polio) virus…etc.


The Raw Material of Product Constitutes


1. All ABS plastics contains the anti-ultraviolet (UV) special processing.

2, “Pocket Purifier” includes 4-Watt T5 Bi-Pin Germicidal UV-C bulb (253.7nm) as core parts.

3. This portable sterilizer is multi-function and handheld type, space design reasonable, the external appearance is elegant.

Comparison for UV-C Bulb, Chlorine and Ozone



UV Irradiation Dosage Table vs. Germs and Viruses

The following are incident energies of germicidal ultraviolet radiation at 253.7 manometers necessary to inhibit colony formation in microorganisms for complete destruction:



z   According to the technique standard of disinfection, various kind of microorganisms all have the particular killing
and death quantity standard vs. ultraviolet ray-C, the UV-C amount is calculated by below formula:

K (disinfectant quantity- μ W Sec/cm2) = I(the strength μ W/cm 2)* t(time-sec)

Depend on this formula, high strength/short time and low strength/long time of UV-C lighting have same disinfection effects.

z   Please note that many variables take place in a real world environment that make actual calculating of the UV dosage very difficult (air flow, humidity, distance of microorganism to the UV light and time). However, it is proven that UV light will kill any DNA-based organism given enough UV dosage and that UV light breaks down DNA on a cumulative basis.
z   Therefore, as germ killing through the “Pocket Purifier” containing an germicidal UV light, the UV light continuously cleanses the air. If a microorganism is not effectively eradicated on the first pass through the
ductwork, the UV light will continue to break its DNA down on subsequent passes.


The Disinfection Effectiveness UV Bulb vs. Germ and Virus

 

 

Type

 

Organisms

100% Killing

Time (Sec.)

 

Type

 

Organisms

100% Killing

Time (Sec.)

 

 

Germs

Anthrax

0.30

Germs

Tubercle Bacillus

0.41

Diphtheria

0.25

Vibrio cholerae

0.64

Tetanus

0.33

Pseudomonas

0.37

 


Botulin

 

 

0.80

 

 

Salmonella

 

 

0.51

 

Bacillus

0.15

Typhoid fever

0.41

E. coli (Escherichia

 

coli)

 

0.36

 

Typhoid

 

0.53

Helicobacter pylori

0.20

Shigella

0.28

 


L.pneumophila

 

 

0.20

 

 

Staphylcoccus

 

 

1.23

 

Micrococcus

0.4-1.53

Streptococcus

0.45

 

 

 

 

Virus

Adenoviruses

0.10

 

Virus

 

Fluenza virus

0.23

�����

0.20

 

Poliovirus

0.80

 


Coxsackie virus

 

 

0.08

 

 

Rotavirus

 

 

0.52

 

 

Echovirus

 

0.73

tobacco mosaic virus

 

(TMV)

 

16

Echovzruses

0.75

HBV

0.73

Mold

 

Spores

Aspergillus niger

6.67

Mold

 

Spores

Ascomycotina

0.33

Aspergillus

0.73-8.80

Penicillium

2.93-0.87

 

Fungus

 

8.0

Penicillium chrysogenum

 

virus

 

2.0-3.33

 


Mucor

 

 

0.23-4.67

 

 

Deuteromycetes

 

 

0.87

 

Alge

Spirulina

10-40

Alge

Paramecium

7.30

Chlorella

0.93

green algae (Chlorophyta)

1.22

Nematode

3.40

Protozoa

4-6.70

 

Fish

 

Disease

 

Fungl disease

 

1.60

 

Fish

 

Disease

Infectious pancreatic

 

necrosis virus (IPNV)

 

4.0

Vitiligo

2.67

Viral nervous necrosis

1.6