Search results for ":FORESTRY"

Analysis of dust exposure during chainsaw forest operations

2017

Abstract: In 1999, the European Union proclaimed hardwood dust carcinogenic based on the classification of the International Agency for Research on Cancer (IARC) issued in 1995. The operational exposure limit (OEL) for inhalable wood dust has been set to 5 mg m-3 by EU directives, though in different countries the OEL ranges from 1 to 5 mg m-3. The objective of this study was to determine the exposure to wood dust of forest workers in chainsaw cutting and processing and suggest possible countermeasures. The study took into consideration different silvicultural treatments (coppice clear cut, conifer thinning, conifer pruning, and sanitary cut) and chainsaw fuel (normal two-stroke gasoline mi…

Ansichten vom Rigaschen Strande

1904

Zāģētavas un ar tām apvienojamās kokrūpniecības nozares

1940

Grāmatas nodaļas: I Ievads II Zāģētavu spēkstacijas III Elektrība kokrūpniecībā IV Zāģētavas vietas izvēles principi un zāģētavas laukuma iedalījums V Baļķu noliktava VI Zāģētavas ēka VII Zāģēto materiālu mākslīga žāvēšana VIII Zāģēto materiālu ēvelēšana IX Zāģēto materiālu noliktava X Zāģētavu atkritumu izmantošanas iespējas XI Koku liekšana. Pielikumi

Siņņa preeksch wisseem Widsemneekeem [Ziņa priekš visiem Vidzemniekiem]

1815

Vidzemes Vispārīgās un ekonomiskās biedrības aicinājums sēt mežus, paziņojums par prēmijām, īsa pamācība koku sēklu savākšanā un mežu sēšanā.

Agrārpolitika: docenta Ed. Šīrona Latvijas Universitātē 1931/32. m. g. rudens semestrī lasīto lekciju konspekts

1932

Weitere Fortschritte in der Flachsgewinnung

1895

Pirmà wispahrejà Latweeschu lopkopju sapulze Rigâ, 16. un 17. februarî 1909. g.

1909

Katalog der dritten baltischen landwirtschaftlichen Ausstellung zu Riga, im Jahre 1880

1880

Inhalt: I. Theil. Gruppirung nach fortlaufender Schnuppen- und Ordnungsnummern ; II. Theil. Gruppirung nach Prämiirungs-Kategorien ; III. Theil. Alphabetisches Verzeichniß der Aussteller nebst Angabe ihrer Ausstellungsobjecte.

Morphometry and subpopulation structure of Holstein bull spermatozoa: variations in ejaculates and cryopreservation straws

2016

Artículo científico Sperm quality is evaluated for the calculation of sperm dosage in artificial reproductive programs. The most common parameter used is motility, but morphology has a higher potential as a predictor of genetic quality. Morphometry calculations from CASA‑Morph technology improve morphological evaluation and allow mathematical approaches to the problem. Semen from 28 Holstein bulls was collected by artificial vagina, and several ejaculates were studied. After general evaluation, samples were diluted, packaged in 0.25 ml straws, and stored in liquid nitrogen. Two straws per sample were thawed, and slides were processed and stained with Diff‑Quik. Samples were analyzed by a CA…

Effects of traditional forest management on carbon storage in a Mediterranean holm oak (Quercus ilex L.) coppice

2018

Abstract: In the last decade, there has been increased interest in measuring and modeling storage in the five forest carbon pools: the aboveground and belowground biomass (living biomass), the deadwood and litter (dead biomass), and the soil (soil organic matter). In this paper, we examined carbon storage in a holm oak coppice stand in the Madonie Mountains in Sicily (Italy), which is a typical case of managed coppice stands. Today, traditional coppice practices are only applied to a small number of forested areas in Sicily, such as the selected site, because of the decline in demand for wood and charcoal. The dendrometric parameters of the stands were recorded, and silvicultural indices we…