Avaliação dendrocronológica de Sebastiania commersoniana em uma floresta ciliar do Rio Tibagi sob influência de Guadua cf. tagoara.

Resumo

Reconhecimento da periodicidade de formação dos anéis de crescimento de algumas espécies florestais da Floresta Ombrófila Mista, através de técnicas dendrocronológicas.

EVINCI. Resumo 033

Influence of bamboo Guadua aff. paraguayana Doll (Poaceae) on the radial increment of Sebastiana commersoniana trees in remnant of a Mixed Ombrophilous Alluvial forests in southern Brazil.

WorldDendro 2010

Impacto de Guadua paraguayana sobre remanescente de Floresta Ombrófila Mista Aluvial: uma abordagem biogeoquímica.

Guadua paraguayana Döll, um bambu nativo da porção meridional da América do Sul particularmente agressivo, está invadindo áreas de preservação permanente no segundo planalto paranaense, com supressão da vegetação instalada e modificações nos padrões de sucessão local. Após estabelecer sua autoecologia, para melhor avaliar seu impacto sobre um dos últimos remanescentes da Floresta Ombrófila Mista Aluvial (FOMA), principalmente na ciclagem de nutrientes e no fluxo de carbono orgânico para o ambiente, estudou-se a composição química da espécie, a produção e decomposição de serapilheira e a distribuição das raízes. A área em estudo (25º 13?20,8? S e 50º04?26,8? W, Ponta Grossa/PR) é uma planície de inundação degradada às margens do rio Tibagi. Os valores anuais de produção de serapilheira de G. paraguayana foram estimados em 7.500 kg/ha, com meia vida superior a 260 dias para os limbos e 360 dias para as bainhas foliares. No período analisado, as folhas retornaram ao ambiente 164,27 kg/ha de macronutrientes. Com base na concentração de carbono da folha, o fluxo de carbono orgânico da vegetação para o solo foi estimado em 2.800 kg/ha/ano. Em comparação com os valores de FOMA melhor preservada, a presença dominante desse bambu reduz a quantidade de nutrientes e de carbono devolvidos ao meio

Recycling of steel profiles

W artykule przedstawiono proces wytwórczy ram okien okrętowych. Jego modyfikacja umożliwiła zmniejszenie energochłonności oraz zastosowanie recyklingu półfabrykatu ram. Zastąpienie spawania ram ich zgrzewaniem zwiększyło wydajność produkcji. Ręczne szlifowanie zgrzein zastąpiono automatyczną frezarką. Możliwe stało się odzyskiwania stali stopowych oraz odpadu poprodukcyjnego profilu ram o długości od 500 mm do 3 m, dotychczas złomowanego. Jest on powtórnie zgrzewany i obrabiany. Słowa kluczowe: frezarka specjalna, obróbka zgrzein, recycling staliThe paper describes manufacturing process of marine window frames. Process modification enabled the reduction of energy consumption and recycling of frame prefabricated pieces. Replacement of fusion welding of frames with their pressure welding increased the production capacity. Manual grinding of weld was replaced with an automatic milling machine. Recovery of alloy steel and previously scrapped manufacturing waste of frame sections from 500 mm to 3 m in length is now possible. Recovered material is rewelded and retreated

Automation of thin film deposition process based on magnetron sputtering

This paper presents the structure of a flow processing line implemented in domestic industry and designed for thin film deposition over large surfaces in an atmosphere of argon and reactive gases. The design of the line has been developed based on original pumping cycle and magnetron sputtering control systems

Indirect method of measuring micro-leaks in hydraulic valves

W napędach płynowych stosowanych w przemyśle spożywczym najkorzystniejszą cieczką robocząjest woda. Czysta woda jest idealnym medium spełniającym warunki higieniczno-sanitarne. W związku z małą lepkością wody ważnym zagadnieniem jest ocena przecieków wewnętrznych przez zawory hydrauliczne. W artykule przedstawiona została pośrednia metoda pomiarów mikro-przecieków.Water is the best working liquid for fluid drives used in food industry. Clean water is ideal medium which meets sanitary-hygienic conditions. Due to low viscosity of water an important issue is to estimate the internal leakage of hydraulic valves. The paper presents an indirect method of measuring such micro-leaks

Numerically controlled feeder

Artykuł przedstawia konstrukcję i działanie dozownika sterowanego numerycznie. Taki sposób sterowania umożliwia łatwość nastawiania i regulacji parametrów dozowania oraz poszerza możliwości technologiczne urządzenia.Design and working of a numerically controlled feeder is presented in the paper. The numerical method of feeder control makes the batching process easy and gives a new production potentjal

Modyfication of liquor and marshmallow dispensing system

Istniejący układ dozowania likworu i spienionej galaretki zawierający stację stemplowania mąki formierskiej został rozbudowany o dozownik pomady. Konieczne było dostosowanie nowego dozownika do systemu sterowania istniejącej linii produkcyjnej. Technologiczne próby przemysłowe potwierdziły skuteczność działania przebudowanego układu. Słowa kluczowe: dozownik, pomada, marshmallowThe existing liquor and marshmallow feeding system containing flour stan ping station was extended with a pomade feeder. It was necessary to adju the purchased feeder to control parameters of existing process line. Techni logical manufacturing tests confirmed the action efficiency of reconstructe system

Investigations of optical and surface properties of Ag single thin film coating as semitransparent heat reflective mirror

Abstract The paper presents results of optical and surface morphology investigations of semitransparent silver single thin films deposited on glass substrate in relation to their heat radiation treatment. The thickness of 15 nm for the silver thin films was selected using computer designing of optical spectra and the films were deposited using electron beam evaporation process. Optical transmission and reflection were investigated for as deposited samples and after exposition to heat radiation from quartz-halogen lamp. The changes in the optical spectra were observed which suggested degradation of deposited heat mirrors. Structure and surface morphology studies performed using scanning electron microscopy, X-ray photoelectron spectroscopy and atomic force microscopy allowed us to conclude about formation of nanometric silver islands, regularly distributed over the surface of the glass substrate after exposure to heat treatment.</jats:p