Yield table for selected black locust (Robinia pseudoacacia L.) cultivars

In Hungary, the black locust (Robinia pseudoacacia L.) can be considered as the most important fast-growing, stand-forming introduced tree species. Due to its positive growing technological characteristics as well as wood utilization possibilities, at the present, black locust is the most widely planted tree species in Hungary, covering 25% of the country’s total forest area. One of the important tasks ahead of Hungarian black locust growers is to improve the quality of black locust stands with introducing selected cultivars. For the estimation of the growth rate and yield a numerical yield table has been constructed on the basis of surveys of the experimental plots established in pure,managed ’Nyirségi’ ,’Üllői’ and ’Jászkiséri’ black locust cultivars’ plantations which can be suitable for sawlogs production. In the course of 56 stand surveys the key stand characteristics were measured, and then, were reconsidered the average height, diameter (DBH), volume, basal area and stem number given separately for the main (remaining), secondary (removal) and total stands per hectare. The programmable editing procedure allows to extention and formal change of information content of the yield table according to different demands.

A simplified method for application of natural regeneration in black locust (Robinia pseudoacacia L.) stands in Hungary

Black locust (Robinia pseudoacacia L.) is one of the most important forest tree species in Hungary, covering approximately 24% of the forest land and providing 25% of the annual timber supply. One third of these black locust stands are high forests (planted with seedlings) and the remaining stands are coppices. An auxiliary table was developed for planning the black locust natural regeneration in order to determine the sprouting criteria based on stand volume at the final cutting age. Twenty forest subcompartments were selected for investigating the possibility of black locust regeneration by root suckers. The basic yield and stand structure factors were determined using the numerical yield table for black locust stands. The results show that the regeneration of black locust stands from root suckers can be recommended on good and medium quality sites without a decrease in yield or stem quality. Black locust stands of good and medium quality (yield classes I, II, III and IV) may be regenerated from suckers in general until their growing stock attains and if their health is adequate. The simplicity of the practice-oriented auxiliary table based on the black locust yield table may further the development of management and wood utilization of the species.

A Diameter Distribution Yield Prediction for Teak Stands in Taungoo District, Bago Region of Myanmar

A parameter recovery procedure was applied to characterize the parameters for the Weibull distribution function based on four percentile methods and two hybrid methods which were the combination of diameter percentiles and moment methods. The procedure was used to develop a diameter distribution yield prediction for teak stands in Taungoo District of Myanmar. All the methods were evaluated by using independent observed data and calculating error indices. Among them, method 1 which involved the 31st and 63rd diameter percentiles produced the lowest error index. Therefore, method 1 was considered to predict yield based on diameter distribution and selected to construct a yield table for the study area. An example was also provided to show users how to apply this kind of yield prediction.

Tending Cutting and Target Diameter Tables for Northern Red Oak (Quercus rubra L.) Stands in Hungary

In addition to black locust (Robinia pseudoacacia L.) and hybrid poplars, northern red oak (Quercus rubra L.) can be considered the third most important exotic stand-forming tree species in Hungary. Due to its advantageous silvicultural and growth characteristics, as well as its wood utilization possibilities, the present area northern red oak stands occupy in the country amount to 15 thousand hectares. This study presents a new, simplified tending cutting table for northern red oak stands as well as an age-target diameter table suitable for quality log production within a rotation period of generally 80–85 years. The simplicity of the practice-oriented tables based on a relevant yield table may further the qualitative development of northern red oak management and wood utilization.

Supernova Yields for Chemical Evolution Modeling

We review the recent results of the nucleosynthesis yields of massive stars. We examine how those yields are affected by some hydrodynamical effects during the supernova explosions, namely, explosion energies from those of hypernovae to faint supernovae, mixing and fallback of processed materials, asphericity, etc. Those parameters in the supernova nucleosynthesis models are constrained from observational data of supernovae and metal-poor stars. The elemental abundance patterns observed in extremely metal-poor stars show some peculiarities relative to the solar abundance pattern, which suggests the important contributions of hypernovae and faint supernovae in the early chemical enrichment of galaxies. These constraints on supernova nucleosynthesis are taken into account in the latest yield table for chemical evolution modeling.

Mutation profling in patients with carcinoma of unknown primary using the Sequenom MassARRAY system.

4131 Background: CUP management may be viewed as an epitome of personalised medicine as we apply our understanding of biological markers to this heterogeneous disease. There is a significant interest in evaluating actionable mutations in various signaling pathways, receptors and downstream effectors in CUP that may help us understand its biology and serve as the basis for unique targeted therapeutic approaches. Sequenom (SQM) Massarray platform enables rapid mutation profiling in solid tumors which we applied to CUP. Methods: 83 CUP samples were sent for DNA mass array analysis. Sequenom was run on 60 samples; 23 samples lacked sufficient quantity or quality of DNA. Data on clinicopathological features was collected. Results: Of the 60 patient samples run on SQM, 16 patients had changes including 11 mutations and 6 polymorphisms . The 6 polymorphisms were in MET . The mutations reported were :RAS (7; 6 KRAS, 1 NRAS), IDH1 (2), PI3K (1) and MET (1). Atleast 50% of the tumors were poorly differentiated. Interestingly, the 2 patients with IDH1 mutations presented with osseous predominant metastatic disease. Of the 6 patients with KRAS mutations, 4 presented with a gastrointestinal profile ( CDX2+ or CK20+) on IHC; in all 4, the DNA sequencing analysis results matched the sequenom results. Conclusions: The (all-comers) overall mutation rate in a heterogenous CUP population is low (11/60, 18%). No "new" low frequency mutations were found using the current panel (Table). Rare and potentially targetable mutations may be identified with a larger panel. Focusing on CUP subsets using this approach may also provide a higher mutational yield. [Table: see text]