Heavy metal toxicity and metal pair interactions to Lemna minor (Common duckweed)
Başlık çevirisi mevcut değil.
- Tez No: 364429
- Danışmanlar: PROF. DR. YÜKSEL İNEL
- Tez Türü: Doktora
- Konular: Çevre Mühendisliği, Environmental Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1991
- Dil: İngilizce
- Üniversite: Boğaziçi Üniversitesi
- Enstitü: Çevre Bilimleri Enstitüsü
- Ana Bilim Dalı: Çevre Bilimleri Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
Özet yok.
Özet (Çeviri)
A search of the literature for evidence concerning the effects of pH on duckweeds has revealed little information. One-third strength Hutner's medium which was reported most extensively in the literature for culturing duckweeds was chosen to investigate the effects of both daily regulated and buffered pH action on the growth of Lemna minor. Daily frond counts were made to detect their growth responses and the results were evaluatod as percentage frond number increase per day. Hesults on daily regulated media confirmed that Lemna minor did not favor alkaline conditions for growth. Consequently, stoadily increasing growth rates were observed between pH 4.0-8.0 .Growth was most successful 011 buffered media at pH levels 6.3-8.0 and Lemna minor had an optimum at about pH 6.8. Nutrient renewal of buffered media in the middle of the test period rosulted in highor growth rates when compared with thH non-renewed media. In Ule second part of Ulis study, Lemna minor was suggested as a promising indicator of aquatic toxicity tests. The effects of cadmium, zinc, cobalt, copper and the coexisting metals such as c8.dmium-zinc, cadmium-copper, copper-cobalt, zinc-cobalt and z.inc-copper 011 the growth and accumulation efficiency of Lemn3 minor were searched on Jacob's media. efficiency of Lernna minor were searched on Jacob's rncc!i.:1. Relative growth rate was defined as the percentage of fresh weight increase per day and the accumulation of the metals were reported in terms of metal incorporated into the frond on dry weight basis. The uptake of metals were determined by Atomic Absorption Spectroscopy after a suitable digestion process. Among the metals tested, cadmium was found to be the most toxic to Lemna minor. Depending on the types of metal pairs tested they showed differing inhibitory and stimulatory effects on the uptake yield by the plant. The presence of copper in the growth medium decreased the uptake of cobalt and cadmium in their separate coexistence. Therefore, antagonism appeared when copper was combined with cobalt and cadmium at equal concentration levels in different treatment sets. However, copper stimulated the uptake of zinc indicaiing that there were synernistic effects when the two were combined. Zinc depressed the uptake of cobalt thus an antagonism was evident. Cadmium increased the uptake of zinc and this result was a syneigistic type effect.
Benzer Tezler
- Hı̇droksı̇apatı̇t bazlı bı̇yomateryallerı̇n modı̇fı̇kasyonu ve denı̇z ortamında ağır metal gı̇derı̇mı̇ ve bı̇yofı̇lm oluşumuna yönelı̇k davranışları
Modification of hydroxyapatite from cattle bones with starch and l- cysteine to remove of heavy metal from environmental samples and limit the biofilm formation
GÜLŞEN MELTEM
Yüksek Lisans
Türkçe
2024
Kimyaİstanbul Teknik ÜniversitesiKimya Ana Bilim Dalı
PROF. DR. ASLI BAYSAL
DOÇ. DR. SALİHA ESİN ÇELİK
DOÇ. DR. NİL ÖZBEK
- Tıbbi laboratuvarlarda ağır metal / eser element testlerine ait numune alma tüplerinin karşılaştırma ölçümlerinin değerlendirilmesi
Evaluation of comparison measurements of sampling tubes for heavy metal / trace element tests in medical laboratories
VOLKAN KINACI
Yüksek Lisans
Türkçe
2024
Halk SağlığıYozgat Bozok Üniversitesiİş Sağlığı ve Güvenliği Ana Bilim Dalı
DOÇ. DR. VUGAR ALİ TÜRKSOY
- Kastamonu kentiçi ağaçlandırmalarında kullanılan bazı ibreli türlerde ağır metal birikiminin belirlenmesi
Determination of heavy metal deposits in some conifer species used in urban afforestations in Kastamonu
LUTFIA AMER A ELTIR
Doktora
Türkçe
2022
Ormancılık ve Orman MühendisliğiKastamonu ÜniversitesiOrman Mühendisliği Ana Bilim Dalı
PROF. DR. AHMET SIVACIOĞLU
- Yakın kızılötesi bölgede Ag+, Cu2+ ve Hg2+ iyonlarının maskeleme ajanları ile ayrımsal ve hassas tespiti için ftalosiyanin tabanlı kimyasal sensörün geliştirilmesi
Development of a phthalocyanine-based chemical sensor for the discriminative and sensitive detection of Ag+, Cu2+ and Hg2+ ions with masking agents in the near infrared region
DİLA ÇETİN
- Biyokütleden elde edilen karbon malzemelerin perovskit güneş pili uygulamaları ve yaşam döngüsü değerlendirmesi
Biomass‑derived carbon materials for perovskite solar cells: synthesis, application, and life cycle assessment
GÖKÇEN GÖKÇELİ KAHVECİ
Doktora
Türkçe
2026
Mühendislik Bilimleriİstanbul Teknik ÜniversitesiEnerji Bilimi ve Teknolojileri Ana Bilim Dalı
PROF. DR. NİLGÜN YAVUZ