Phylogenetic analyses of extant species of Juglans (Juglandaceae) with the New and Old World distributions were performed using five cpDNA intergenic spacer (IGS) sequences (trnT-trnF, psbA-trnH, atpB-rbcL, trnV-16S rRNA, and trnS-trnfM) to elucidate the origin, diversification, historical biogeography, and evolutionary relationships within the genus. Overall, 3848 characters were sampled, yiel...

Tarihi yapıların onarımında, çürümüş veya hasar görmüş ahşap elemanların bunların parçalarının değiştirilmesinin zorunlu olduğu durumlarda, kullanılacak ikame ahşabın orijinal tür ile aynı ve doğal yapıda olması gerekmektedir. Bu nedenle mimari yapı malzemesi olarak kullanıldığı tarihi binaların restorasyonunda, malzemenin teşhisi büyük önem arz etmektedir. Anadolu Selçuklu Dönemi'nde, 1272-127...

Black walnut (Jug/am nigra L.) seeds are large and require stratification for germination. However, many seeds fail to germinate following stratification. Radiography can be used to select empty seeds, but cannot determine which full seeds will germinate. The objective of this study was to determine if any discrimination could bc achieved through use of nuclear magnetic resonance (NMR) spectros...

Black walnut, a valuable economic and environmentally important species, is threatened by thousand cankers disease. Systemic imidacloprid and dinotefuran applications were made to mature black walnut trees to evaluate their translocation and concentration levels in various tissue types including leaf, twig, trunk core, nutmeat, and walnut husk. The metabolism of imidacloprid in plants produces ...

Oxidase activities were investigated within the cross-section of walnut trunk in relation to the brown staining of heartwood, especially in the transition zone where the colour change occurs. The distribution of peroxidase activity was investigated using 3,3'-diaminobenzidine (DAB) or guaiacol as a substrate. Generally, the highest activity was found in the cambial zone and in the middle sapwoo...

Abstract Wood characteristics of trees grown in agroforestry systems are little studied, even if growth conditions different from conventional stands. This work aimed to determine the impact system on heartwood formation process hybrid walnut ( Juglans regia × nigra ) trees, especially resulting extractive contents. Ethanol and water extractions were successively performed wood samples taken ac...