Antimicrobial hybrid cellulose-lignin beads

In the present study, cellulose-lignin beads were prepared using pretreated dissolving grade-pulp and extracted from birch wood hydrotropic lignin as starting materials. The preparation involved dissolution of both polymers in environmentally friendly 7% NaOH/12% urea aqueous solution, shaping the solution into beads and subsequent regeneration. Lignin content in the beads varied from 0 to 40%. The beads were characterized using FTIR, scanning electron and confocal fluorescence microscopy. Porosity, swelling behavior and leaching of lignin from the beads in water were studied as well. The antibacterial properties of the beads and original hydrotropic lignin were tested using Escherichia coli (XL-1 Blue) and Staphylococcus aureus (ATCC 25923). The obtained beads in a never-dried state were highly porous spherical particles with evenly distributed lignin in them. Their shape, structure and properties were influenced by the lignin content. The beads did not show antibacterial activity against gram-negative E. coli. On the other hand, never-dried cellulose-lignin beads inhibited growth of gram-positive S. aureus, and the inhibition efficiency increased with the lignin content. The half inhibitory concentration for never-dried beads with 40% of lignin was 1.06 mg (dry weight) per 1 mL of broth determined after incubation for 24 h at 37 °C and at initial concentration of S. aureus of 6.48 log(CFU/mL). In contrast to cellulose-lignin beads, pure cellulose beads did not inhibit growth of S aureus. The results demonstrated that hydrotropic birch lignin can be used for the preparation of composite cellulose-lignin beads. Such beads show a great potential for antibacterial applications against S. aureus.

Gabov, K., Oja, T., Deguchi, T. et al. Cellulose (2017) 24: 641.

4 Comments on “Antimicrobial hybrid cellulose-lignin beads

  1. Kiaraa diane doo analYoutube moonkey pussyNaked dragonballAsss
    hhard hotAduult texas dallas personalsSex
    phrases and quotesGreenville erotic massageTgpp mture
    olderHot shyemale fhck flicksBust mature gangbangedVintage hockey goalkie
    maskFrree gay cuum mp4 clipsHaarsh anaal sexFree violet stotm facial
    picBusty babe orgasmTanmya fox nudeRetro haiy milf thumbsRapidshare ppantyhose playtimeSlutlkoad veery deepthroatHentai
    ashley grahamPaass thee pkss testDaddy tinjna jerry cock pussyFuckimg on the bbus pornSupe tigt mil ass picsVintazge sedond hawnd
    coutureVintage aluminum christmas treesCumm ssa alegCahdice michelles ssex videoFacial exeercises to makeBi sexxual black womanMackenna’s
    gold vintage original posterFreee fooot porn videosKaaty price boobsCumshot amWorld war 2 nudesFriend hot tubb sexEldcer menn women fuckingSupr heos nudeBreast cancer
    treatment stageRen e o connor nudeExtreme crue tortrure bbdsm artt workKate cebrao titsRussian models teenSleseping maan gets a blowjobDepthroat
    pirn tybe sitesFrree vijrgin mobile topp upAss bikiini booty buttJackk
    offf to ggay pornFreee guage mocies pornTerns inn
    fostercre sisterly lust gameplay Freee seex videos trialWashibgton dc gayy lifeNuude femaale flashig
    trucker whle drivingErotic viddeo storiesBriitish chgav slags fucking4 leebians gone wildTorture seex
    video rapidshareAdult video lory holeChrsty alley nakedChamkpage vaginaMilkfs modells over
    18 2257 compliantBlackmen nudeAian noodle menuIndian porn videos freee schhol girlsSweet transvestiteFat womkan plimp sex moviesEvva longoria nhde with boyfriendJapanese adulot forumsBest ssex i ever haad storiesSymvols oof assocuations ffor breaset feedingFree wpmen onn
    tranny videosNipplkes clit gettimg pierdced videoBiig
    copck gayy mp4Bottom bracket widthSeex wile taking seasoniqueSuburban houewives
    sex storyFrree ffat gayy picFacal exercies woth repint rightsFreee brutal sexx
    clipSwiner sex 24 7Female teens handcuffedFaay reagawn deepthroatClip free hannd jobGrocery ssex storeIo min free seex vjdeo nurseGardden swinmging seatsSeattle fetishSilicone ppenis pummp donutCapella teenPuesy
    bath slut loadEmmma watson sexy nudeSoap onn a rope penisCharledze theron nudeGirls seex stores in pakistanPeenis ropesEscor laser shifter zr3 laserHot brynett assSaaw zaw dildoFree adult
    xxx films with dialogueMalle masturbation techniques with fruitBdsmm
    females riding guysHd nudre latyina modelsDay eeva mendes nude picc trainingHoot sexyy teenagerSouth asiasn effrects
    oof irrigationPorn smsHechi hentaiMia lee’s breastAnal fontHoot sexcy bawbes in pantiesGuuys with 12
    inch cocksAss latin bitchesHarrd cut suckingBondage claamp clamp ropee tightFree tub botyle sexEarly masturbation fewmale cucumberNaed asiaqn blow jobOldd fuckng teensCatholic
    church confirmmation claasses for adultsWomen largge
    beeast nakedOlovesly fuckFree blacck on whiote gangbbang videosArts
    asian matial worldPeee dee apartmment albemarle ncFree nyde animationHe mad
    me suck hiss penisCuntt cheerleaderCuum squirt orgasmFreee porno avvis
    samplesStyle forr chbby menWomen openn sexParis hilon nudeShana
    nudePerfect teen buttsHidden voyeur seex camsSexxy hong swimwear customersIkb
    acial creamFreee streamiing latin pon vidInocent ssex clips
    videoHorny chic fucks oldPaster malisa scoot nakedIs anl sex enjoyabloe for menCollegge boys nude
    videoBusty copps protect andd serve castBooty ebony xxxKerry kaona sex tzpe torrentCountrryboy man stripperTeen specialistSpanking penisGaay hopShemale bonerShe
    ttold him noot too cumSweeet warm slow lowjob videoExtreme hajry russian womanSexal discrimination tthe universiy freno beeNew free puswy
    pictures80 s hairy pussyy moviesMature wife huusband orgasmBesst hdd nudeKat stack nazked picsTheater of pleasureEatihg anal creampie picsEbbay for
    matureItchy nipplrs teenSoutheast asiian countriers by populationCheyl cole nakedI huirt myy penisRussan porn actress summer breezePorn xxxx
    videos freeLos angeles blpack mmale strippersBllacks hardcore gangbangsViiewer uploadeed forcxe fuck videoFreee gujjarati
    ssex photographsCinhdy margolis nude strar celebsAsiwn jewelersVirgin ass force fuckedTerry
    fucked ersa in 1975Pictures off actress shelby young titsNakedd girl testNudee
    boys big dicksAnne hathaqays breastNudee old wwife picturesNasty teeens taking
    off their clothesAustralian upskirtsYour mom mklf gallery freeFucking andd anal insertionPre
    1940 vintageTeeies tggp powered by vbulletinDd size breastsJohnie black fucksLena alexabdra nide
    picsNude marathonBoob the builder fucking wendyFrree young gayy cockk picturesSexyyy maid fuckerd hardecoreAdukt holes in heartAmanda
    peat lesbizn love sceneFiished por sitee passwordsThee upper level bondageDickk heath
    and teacher

  2. Wow, amazing blog format! How long have you been running a
    blog for? you make blogging look easy. The
    whole look of your site is great, as neatly as the content!
    You can see similar here sklep internetowy

  3. Wow, amazing blog format! How lengthy have you
    been running a blog for? you made running a blog look easy.

    The overall glance of your website is wonderful,
    let alone the content material! You can see similar here najlepszy sklep

  4. Wow, fantastic weblog format! How long have you ever
    been blogging for? you made running a blog glance easy. The overall
    glance of your site is magnificent, let alone the content!
    You can see similar here e-commerce

Leave a Reply

Your email address will not be published. Required fields are marked *