FastQCFastQC Report
Sun 21 May 2023
EGAF00007846697

Summary

[OK]Basic Statistics

MeasureValue
FilenameEGAF00007846697
File typeConventional base calls
EncodingSanger / Illumina 1.9
Total Sequences50137
Sequences flagged as poor quality0
Sequence length250
%GC52

[OK]Per base sequence quality

Per base quality graph

[FAIL]Per tile sequence quality

Per tile quality graph

[OK]Per sequence quality scores

Per Sequence quality graph

[FAIL]Per base sequence content

Per base sequence content

[FAIL]Per sequence GC content

Per sequence GC content graph

[OK]Per base N content

N content graph

[OK]Sequence Length Distribution

Sequence length distribution

[FAIL]Sequence Duplication Levels

Duplication level graph

[FAIL]Overrepresented sequences

SequenceCountPercentagePossible Source
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGGTGCGAGCGTTA10502.0942617228793106No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTAGGGTGCGAGCGTTA10352.064343698266749No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGGAGGATGCGAGCGTTA9611.9167481101781119No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGAGGATGCGAGCGTTA9221.8389612461854519No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTAGGTGGCAAGCGTTG8211.6375132137942041No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGTGGCAAGCGTTG8081.6115842591299838No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGAAGGTCCAGGCGTTA7961.5876498394399345No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGGAAGGTCCAGGCGTTA7791.5537427448790315No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTAGGGTGCGAGCGTTA6811.3582783174102957No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGGAGGATGCGAGCGTTA6231.2425952889083909No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTAGGGTGCGAGCGTTA6211.2386062189600495No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGTCCCGAGCGTTG6111.2186608692183418No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGGAGGATGCGAGCGTTA6091.2146717992700002No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCTGTTTGCTACCCACGCT6061.2086881943474879No Hit
TACCGGTCGCCGGACTACGCGGGTTTCTAATCCTGTTTGCTACCCACGCT5911.1787701697349262No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTAGGTCCCGAGCGTTG5761.1488521451223648No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCTGTTTGCTCCCCACGCT5651.1269122604064863No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGGAAGGTCCAGGCGTTA5451.087021560923071No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTATGTCACAAGCGTTA5421.0810379560005585No Hit
TACCGGTCGCCGGACTACTGGGGTTTCTAATCCTGTTTGCTACCCACGCT5371.0710652811297046No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTATGTCACAAGCGTTA5331.0630871412330216No Hit
TACCGGTCGCCGGACTACGCGGGTTTCTAATCCTGTTTGCTCCCCACGCT5201.0371581865688015No Hit
TACCGGTCGCCGGACTACTGGGGTTTCTAATCCTGTTTGCTCCCCACGCT4790.9553822526277999No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTAGGTGGCAAGCGTTG4650.9274587629894091No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGGAAGGTCCAGGCGTTA4540.9055188782735306No Hit
TACCGGTCGCCGGACTACGAGGGTTTCTAATCCTGTTTGCTACCCACGCT4530.9035243432993598No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTAGGTGGCAAGCGTTG4460.8895625984801644No Hit
TACCGGTCGCCGGACTACGAGGGTTTCTAATCCTGTTTGCTCCCCACGCT4310.8596445738676027No Hit
TACCGGTCGCCGGACTACTCGGGTTTCTAATCCTGTTTGCTCCCCACGCT4120.821748409358358No Hit
TACCGGTCGCCGGACTACTCGGGTTTCTAATCCTGTTTGCTACCCACGCT3960.7898358497716258No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGAGGGTGCGAGCGTTA3830.7639068951074057No Hit
TACCGGTCGCCGGACTACGCGGGTTTCTAATCCTGTTTGATACCCACGCT3520.7020763109081117No Hit
TACCGGTCGCCGGACTACCGGGGTTTCTAATCCTGTTTGCTACCCACGCT3440.6861200311147456No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCTGTTTGATACCCACGCT3440.6861200311147456No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGGAGGGTGCGAGCGTTA3440.6861200311147456No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTAGGTCCCGAGCGTTG3410.6801364261922332No Hit
TACCGGTCGCCGGACTACCGGGGTTTCTAATCCTGTTTGCTCCCCACGCT3310.6601910764505255No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTAGGTCCCGAGCGTTG3290.6562020065021841No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTATGTCACAAGCGTTA3210.6402457267088179No Hit
TACCGGTCGCCGGACTACAGGGGTTTCTAATCCTGTTTGCTACCCACGCT3140.6262839818896224No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTATGTCACAAGCGTTA3140.6262839818896224No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTATGTCGCGAGCGTTA3050.6083331671220855No Hit
TACCGGTCGCCGGACTACTAGGGTTTCTAATCCTGTTTGCTACCCACGCT2810.560464327741987No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTATGTCGCGAGCGTTA2780.5544807228194747No Hit
TACCGGTCGCCGGACTACAGGGGTTTCTAATCCTGTTTGCTCCCCACGCT2760.5504916528711331No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGGGGCAAGCGTTA2660.5305463031294253No Hit
TACCGGTCGCCGGACTACACGGGTTTCTAATCCTGTTTGCTACCCACGCT2620.5225681632327422No Hit
TACCGGTCGCCGGACTACGAGGGTTTCTAATCCTGTTTGATACCCACGCT2570.5125954883618884No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTAGGGGGCAAGCGTTA2510.5006282785168639No Hit
TACCGGTCGCCGGACTACGGGGGTATCTAATCCTGTTTGCTACCCACGCT2470.49265013862018076No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGGAGGGTGCGAGCGTTA2440.4866665336976684No Hit
TACCGGTCGCCGGACTACTGGGGTTTCTAATCCTGTTTGATACCCACGCT2430.48467199872349764No Hit
TACCGGTCGCCGGACTACTAGGGTTTCTAATCCTGTTTGCTCCCCACGCT2420.4826774637493268No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGAAGGTCCGGGCGTTA2420.4826774637493268No Hit
TACCGGTCGCCGGACTACCCGGGTTTCTAATCCTGTTTGCTACCCACGCT2410.48068292877515606No Hit
TACCGGTCGCCGGACTACTCGGGTTTCTAATCCTGTTTGATACCCACGCT2380.4746993238526438No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGGCGCGAGCGTTG2350.4687157189301314No Hit
TACCGGTCGCCGGACTACGCGGGTATCTAATCCTGTTTGCTACCCACGCT2310.4607375790334483No Hit
TACCGGTCGCCGGACTACACGGGTTTCTAATCCTGTTTGCTCCCCACGCT2290.45674850908510684No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTAGGGCGCGAGCGTTG2280.45475397411093604No Hit
TACCGGTCGCCGGACTACCCGGGTTTCTAATCCTGTTTGCTCCCCACGCT2220.44278676426591135No Hit
TACCGGTCGCCGGACTACGGGGGTATCTAATCCTGTTTGCTCCCCACGCT2130.42483594949837444No Hit
TACCGGTCGCCGGACTACGCGGGTATCTAATCCTGTTTGCTCCCCACGCT2090.4168578096016914No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGGAGGGTGCGAGCGTTA2020.40289606478249596No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTATGTCGCGAGCGTTA1980.3949179248858129No Hit
TACCGGTCGCCGGACTACCAGGGTTTCTAATCCTGTTTGCTACCCACGCT1950.3889343199633005No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGGAAGGTCCGGGCGTTA1950.3889343199633005No Hit
TACCGGTCGCCGGACTACTGGGGTATCTAATCCTGTTTGCTACCCACGCT1820.36300536529908056No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGGAAGGTCCGGGCGTTA1790.3570217603765682No Hit
TACCGGTCGCCGGACTACCAGGGTTTCTAATCCTGTTTGCTCCCCACGCT1790.3570217603765682No Hit
TACCGGTCGCCGGACTACCGGGGTTTCTAATCCTGTTTGATACCCACGCT1730.34505455053154355No Hit
TACCGGTCGCCGGACTACGAGGGTATCTAATCCTGTTTGCTCCCCACGCT1690.3370764106348605No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCTGTTCGATACCCGCACC1680.3350818756606897No Hit
TACCGGTCGCCGGACTACTGGGGTATCTAATCCTGTTTGCTCCCCACGCT1680.3350818756606897No Hit
TACCGGTCGCCGGACTACTGGGGTTTCTAATCCTGTTCGATACCCGCACC1680.3350818756606897No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTATGTCGCGAGCGTTA1660.33109280571234817No Hit
TACCGGTCGCCGGACTACTAGGGTTTCTAATCCTGTTTGATACCCACGCT1620.3231146658156651No Hit
TACCGGTCGCCGGACTACTCGGGTATCTAATCCTGTTTGCTACCCACGCT1580.315136525918982No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTAGGGCGCGAGCGTTG1560.3111474559706404No Hit
TACCGGTCGCCGGACTACACGGGTTTCTAATCCTGTTTGATACCCACGCT1550.3091529209964697No Hit
TACCGGTCGCCGGACTACAAGGGTTTCTAATCCTGTTTGCTACCCACGCT1540.3071583860222989No Hit
TACCGGTCGCCGGACTACAAGGGTTTCTAATCCTGTTTGCTCCCCACGCT1540.3071583860222989No Hit
TACCGGTCGCCGGACTACGCGGGTATCTAATCCTGTTTGATACCCACGCT1520.30316931607395736No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTAGGGCGCGAGCGTTG1510.3011747810997866No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTAGGGGGCAAGCGTTA1490.29718571115144504No Hit
TACCGGTCGCCGGACTACAGGGGTTTCTAATCCTGTTTGATACCCACGCT1490.29718571115144504No Hit
TACCGGTCGCCGGACTACGCGGGTTTCTAATCCTGTTCGATACCCGCACC1480.29519117617727425No Hit
TACCGGTCGCCGGACTACGCGGGTTTCTAATCCCGTTCGCTCCCCTGGCT1460.2912021062289327No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTAGGGGGCAAGCGTTA1460.2912021062289327No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGGAAGGTCCGGGCGTTA1460.2912021062289327No Hit
TACCGGTCGCCGGACTACTGGGGTTTCTAATCCCGTTCGCTCCCCTGGCT1420.2832239663322496No Hit
TACCGGTCGCCGGACTACCCGGGTTTCTAATCCTGTTTGATACCCACGCT1400.2792348963839081No Hit
TACCGGTCGCCGGACTACGAGGGTATCTAATCCTGTTTGCTACCCACGCT1390.27724036140973735No Hit
TACCGGTCGCCGGACTACTCGGGTATCTAATCCTGTTTGCTCCCCACGCT1360.271256756487225No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCCGTTCGCTCCCCTGGCT1340.26726768653888344No Hit
TACCGGTCGCCGGACTACGAGGGTATCTAATCCTGTTTGATACCCACGCT1280.25530047669385886No Hit
TACCGGTCGCCGGACTACGGGGGTATCTAATCCTGTTTGATACCCACGCT1270.25330594171968807No Hit
TACCGGTCGCCGGACTACTAGGGTATCTAATCCTGTTTGCTACCCACGCT1250.2493168717713465No Hit
TACCGGTCGCCGGACTACGAGGGTTTCTAATCCTGTTCGATACCCGCACC1220.2433332668488342No Hit
TACCGGTCGCCGGACTACAAGGGTTTCTAATCCTGTTTGATACCCACGCT1150.22937152202963879No Hit
TACCGGTCGCCGGACTACTCGGGTTTCTAATCCTGTTCGATACCCGCACC1140.22737698705546802No Hit
TACCGGTCGCCGGACTACGAGGGTTTCTAATCCCGTTCGCTCCCCTGGCT1090.21740431218461417No Hit
TACCGGTCGCCGGACTACAGGGGTATCTAATCCTGTTTGCTCCCCACGCT1070.21341524223627262No Hit
TACCGGTCGCCGGACTACTGGGGTATCTAATCCTGTTTGATACCCACGCT1060.21142070726210185No Hit
TACCGGTCGCCGGACTACCGGGGTTTCTAATCCCGTTCGCTCCCCTGGCT1050.20942617228793106No Hit
TACCGGTCGCCGGACTACCGGGGTATCTAATCCTGTTTGCTACCCACGCT1040.2074316373137603No Hit
TACCGGTCGCCGGACTACTCGGGTTTCTAATCCCGTTCGCTCCCCTGGCT1030.2054371023395895No Hit
TACCGGTCGCCGGACTACAGGGGTATCTAATCCTGTTTGCTACCCACGCT1030.2054371023395895No Hit
TACCGGTCGCCGGACTACCGGGGTATCTAATCCTGTTTGCTCCCCACGCT1000.19945349741707719No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACAGAGGGTGCGAGCGTTA1000.19945349741707719No Hit
TACCGGTCGCCGGACTACACGGGTATCTAATCCTGTTTGCTACCCACGCT980.19546442746873569No Hit
TACCGGTCGCCGGACTACCCGGGTATCTAATCCTGTTTGCTCCCCACGCT950.18948082254622334No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCTGTTCGCTCCCCACGCT950.18948082254622334No Hit
TACCGGTCGCCGGACTACCAGGGTTTCTAATCCTGTTTGATACCCACGCT910.18150268264954028No Hit
TACCGGTCGCCGGACTACCGGGGTTTCTAATCCTGTTCGATACCCGCACC910.18150268264954028No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACAGAGGGTGCGAGCGTTA900.1795081476753695No Hit
TACCGGTCGCCGGACTACTAGGGTATCTAATCCTGTTTGCTCCCCACGCT870.17352454275285717No Hit
TACCGGTCGCCGGACTACGCGGGTTTCTAATCCTGTTCGCTCCCCACGCT870.17352454275285717No Hit
TACCGGTCGCCGGACTACCCGGGTATCTAATCCTGTTTGCTACCCACGCT810.16155733290783256No Hit
TACCGGTCGCCGGACTACTAGGGTTTCTAATCCCGTTCGCTCCCCTGGCT800.15956279793366177No Hit
TACCGGTCGCCGGACTACCGGGGTATCTAATCCTGTTTGATACCCACGCT770.15357919301114945No Hit
TACCGGTCGCCGGACTACACGGGTTTCTAATCCCGTTCGCTCCCCTGGCT770.15357919301114945No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTATGTCACGAGCGTTA770.15357919301114945No Hit
TACCGGTCGCCGGACTACAGGGGTTTCTAATCCCGTTCGCTCCCCTGGCT760.15158465803697868No Hit
TACCGGTCGCCGGACTACTAGGGTTTCTAATCCTGTTCGATACCCGCACC750.14959012306280792No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTATGTCGCAAGCGTTA750.14959012306280792No Hit
TACCGGTCGCCGGACTACAGGGGTATCTAATCCTGTTTGATACCCACGCT740.14759558808863713No Hit
TACCGGTCGCCGGACTACTCGGGTATCTAATCCTGTTTGATACCCACGCT740.14759558808863713No Hit
TACCGGTCGCCGGACTACACGGGTTTCTAATCCTGTTCGATACCCGCACC740.14759558808863713No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTAGGGTGCAAGCGTTA730.14560105311446636No Hit
TACCGGTCGCCGGACTACACGGGTATCTAATCCTGTTTGATACCCACGCT720.1436065181402956No Hit
TACCGGTCGCCGGACTACGGGGGTATCTAATCCTGTTCGATACCCGCACC710.1416119831661248No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGGAGGATACGAGCGTTA710.1416119831661248No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTATGTCACGAGCGTTA710.1416119831661248No Hit
TACCGGTCGCCGGACTACACGGGTATCTAATCCTGTTTGCTCCCCACGCT700.13961744819195404No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTAGGTCCCGAGCGTTA700.13961744819195404No Hit
TACCGGTCGCCGGACTACTGGGGTTTCTAATCCTGTTCGCTCCCCACGCT670.13363384326944172No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGAAGGTTCGGGCGTTA660.13163930829527096No Hit
TACCGGTCGCCGGACTACAGGGGTTTCTAATCCTGTTCGATACCCGCACC660.13163930829527096No Hit
TACCGGTCGCCGGACTACCAGGGTATCTAATCCTGTTTGCTACCCACGCT660.13163930829527096No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACAGAGGGTGCGAGCGTTA650.1296447733211002No Hit
TACCGGTCGCCGGACTACAAGGGTTTCTAATCCTGTTCGATACCCGCACC650.1296447733211002No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGGAGGATACGAGCGTTA650.1296447733211002No Hit
TACCGGTCGCCGGACTACTGGGGTATCTAATCCTGTTCGATACCCGCACC640.12765023834692943No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTAGGGTGCAAGCGTTA640.12765023834692943No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGGTGCAAGCGTTA630.12565570337275864No Hit
TACCGGTCGCCGGACTACAAGGGTATCTAATCCTGTTTGCTACCCACGCT630.12565570337275864No Hit
TACCGGTCGCCGGACTACCCGGGTTTCTAATCCCGTTCGCTCCCCTGGCT620.12366116839858787No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGAGGGTGCAAGCGTTA580.11568302850190479No Hit
TACCGGTCGCCGGACTACGAGGGTTTCTAATCCTGTTCGCTCCCCACGCT570.11368849352773401No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGGGGCTAGCGTTA570.11368849352773401No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGAGGATACGAGCGTTA570.11368849352773401No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCTGTTTGCTCCCCCGGCT570.11368849352773401No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGGAAGGTTCGGGCGTTA560.11169395855356323No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTATGTCGCAAGCGTTA560.11169395855356323No Hit
TACCGGTCGCCGGACTACAAGGGTATCTAATCCTGTTTGATACCCACGCT550.10969942357939245No Hit
TACCGGTCGCCGGACTACGCGGGTATCTAATCCCGTTCGCTCCCCTGGCT550.10969942357939245No Hit
TACCGGTCGCCGGACTACTCGGGTTTCTAATCCTGTTCGCTCCCCACGCT550.10969942357939245No Hit
TACCGGTCGCCGGACTACCAGGGTATCTAATCCTGTTTGCTCCCCACGCT550.10969942357939245No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGTAGGTCCCGAGCGTTA540.1077048886052217No Hit
AATCCGTTAGTGTGTCAGCAGCCGCGGTAATACGGGGGGTGCGAGCGTTA540.1077048886052217No Hit
AATCCGTTAGTGTGTCAGCCGCCGCGGTAATACGTATGTCGCAAGCGTTA530.10571035363105093No Hit
AATCCGTTAGTGTGCCAGCCGCCGCGGTAATACGTATGTCGCAAGCGTTA520.10371581865688015No Hit
TACCGGTCGCCGGACTACGCGGGTTTCTAATCCTGTTTGATACCCACACT520.10371581865688015No Hit
TACCGGTCGCCGGACTACGGGGGTTTCTAATCCTGTTTGATACCCGCACC520.10371581865688015No Hit
TACCGGTCGCCGGACTACAAGGGTATCTAATCCTGTTTGCTCCCCACGCT520.10371581865688015No Hit
AATCCGTTAGTGTGCCAGCAGCCGCGGTAATACGTATGTCACGAGCGTTA510.10172128368270937No Hit
TACCGGTCGCCGGACTACCCGGGTTTCTAATCCTGTTCGATACCCGCACC510.10172128368270937No Hit
TACCGGTCGCCGGACTACGGGGGTATCTAATCCCGTTCGCTCCCCTGGCT510.10172128368270937No Hit

[OK]Adapter Content

Adapter graph