Apie viską po truputį

Dažiniai augalai

Dažiniai augalai įvairiose savo dalyse kaupia dažinius organinius junginius, kurie panaudojami įvairioms medžiagoms dažyti. Šie junginiai, dažniausiai glikozidai, kaupiasi augalo stiebuose (mediena, žievė), lapuose, žieduose, vaisiuose, sėklose, šaknyse, ar ląstelių skysčiuose. Yra žinoma daugiau nei 2000 augalinių dažų, tačiau dažniausiai naudojami apie 130. Augant chemijos pramonei, augalinius dažus daugelyje sričių pakeitė gerokai pigesni sintetiniai, nors kai kur, pavyzdžiui, maisto pramonėje, kosmetikoje, aukštos kokybės kilimų gamyboje, dažai iš augalų yra naudojami.

dažantys augalaiDaugiausia pagrindinių dažinių augalų, iš kurių gaminami dažai, auga tropikuose ir subtropikuose. Vertingi dažai (lakmusas) gaunami iš kerpių. Šie dažai labai jautrūs aplinkos rūgštingumui, todėl naudojami kaip indikatorius rūgštinei reakcijai nustatyti.

Lietuvoje yra nemažai augalų, kuriais galima dažyti įvairias medžiagas. Kai kuriais atvejais to paties augalo dažais galima dažyti medžiagas skirtingomis spalvomis. Tai priklauso nuo pridedamų specialių medžiagų. Pavyzdžiui, kadagio uogomis galima nudažyti geltonai, rudai, žalsvai, pilkai, beržo lapais – geltonai, juodai, žaliai, rudai, juodalksnio žieve – raudonai ir juodai, jonažolės žiedais geltonai, žaliai, rausvai, mėlynės uogomis dažoma violetine spalva, o lapais ir šakelėmis – rudai.

Žalias, pagrindinis augalų pigmentas chlorofilas dažymui nenaudojamas, taip kaip ir dažni spalvingų žiedų pigmentai nes jie dažniausiai būna nepatvarūs.

This Post Has 17 Comments

  1. I simply want to mention I am just beginner to blogging and actually loved your blog site. More than likely I’m want to bookmark your site . You surely come with good articles. Appreciate it for revealing your webpage.

  2. Can I say what a relief to discover someone that really knows what theyre preaching about on the net. You actually realize how to bring a concern to light and produce it crucial. The best way to need to check this out and fully grasp this side of the story. I cant believe youre no more popular since you also undoubtedly contain the gift.

  3. Good Work on your latest blog post. I have been checking for additional data on this topic for quite some time now.

  4. Is there a service available that geotags blog posts while on the go and is able to post to map with others?

  5. I post them, they get 1 or 2 views, and then no more. I would like my content to do more than just give me a few views…how do I get them on the search engines or something like that? Will no one ever go to my blog just because I don’t post every day?.

  6. Substantially, the post is actually the greatest on that worthw hile topic. I harmonise with your conclusions and also will certainly thirstily look forward to your coming updates. Simply saying thanks definitely will not just be adequate, for the extraordinary lucidity in your writing. I can immediately grab your rss feed to stay abreast of any updates. Fabulous work and much success in your business enterprize!

  7. What are the best websites and blogs dedicated to reading and literature?

  8. Hi I’m interested in computer courses to study, today I spoke to someone from one of the unis I was interested in one of the courses were more about designing and the other practical and more technical fixing and support the system. I’m really interested in that. Its called computer enterprising. .. . But I want to apply to more but I get confused as every university calls the computer courses a different name. So i’m unsure if its software , or computer science , IT , IS with business. I think it could be IS with business what I’m interested in but I’m unsure. In some of the modules in the enterprise one has : information systems,computer programming ,data management , software testing , human computer interaction. developing internet applications supporting the systems kinda thing. . Which computer course would include that sort of things? Its one of the practical and technical I want I’m not interested in designing. And can anyone tell me from this which computer courses is more like the one i described is it Information technology with business or something else? And is Computer science based on designing the applications? and not the more practical.

Leave a Reply

Close Menu