Energy Consumption for Furniture Joints during Drilling in Birch Plywood.

The purpose of this study is to support eco-design ideas and sustainable manufacturing techniques by examining the energy consumption related to drilling holes for different furniture connections. The experimental model is a simple piece of furniture made from birch plywood with three different types of joints. Eccentric joints, confirmat screws, and dowel measurements of energy consumption with a CNC drilling and milling machine show different values for every kind of connector.

Effect of Low-Thermal Treatment on the Particle Size Distribution in Wood Dust after Milling.

The thermal treatment of wood can improve the appearance of the wood product's surface, its dimensional stability, and resistance to fungal attacks. However, the heat treatment changes the technological properties of wood, making it a new engineering material. This work investigates the effect of the low-thermal treatment of birch wood ( Roth.

Hemp Shives as a Raw Material for the Production of Particleboards.

Increased demand for wood affects its price and thus contributes to the growing interest in raw materials that can be used as a partial or total substitute for wood in the production of particleboard. One of the raw materials for the production of particleboard can be Cannabis sativa or, more precisely, hemp shives. In this work, 7 variants of panels with a density of 650 kg/m with 10 and 25% hemp shives substitution in different layers were produced.

The Dust Separation Efficiency of Filter Bags Used in the Wood-Based Panels Furniture Factory.

The relationship between the conditions of the use of filter bags made of non-woven fabric and the separation efficiency of wood dust generated in a furniture factory was experimentally determined in the conditions of pulse-jet filtration using a pilot-scale baghouse as waste during the processing of wood composites. The experiments were carried out, and we describe the results of the experiment as consisting in assembling one type of filter bag in two dust extraction installations operating under different operating conditions in the same furniture factory. The filter bags working in the assumed time intervals were then tested for their separation efficiency using a stand for testing filtration processes on a pilot scale.

Physical and Mechanical Properties of Particleboard Produced with Addition of Walnut ( L.) Wood Residues.

The depletion of natural resources and increased demand for wood and wood-based materials have directed researchers and the industry towards alternative raw materials for composite manufacturing, such as agricultural waste and wood residues as substitutes of traditional wood. The potential of reusing walnut ( L.) wood residues as an alternative raw material in particleboard manufacturing is investigated in this work.

Characterisation of Wood Particles Used in the Particleboard Production as a Function of Their Moisture Content.

The properties of particleboards and the course of their manufacturing process depend on the characteristics of wood particles, their degree of fineness, geometry, and moisture content. This research work aims to investigate the physical properties of wood particles used in the particleboard production in dependence on their moisture content. Two types of particles currently used in the production of three-layer particleboards, i.

Influence of the Structure of Lattice Beams on Their Strength Properties.

This paper presents the strength properties of wooden trusses. The proposed solutions may constitute an alternative to currently produced trusses, in cases when posts and cross braces are joined with flanges using punched metal plate fasteners. Glued carpentry joints, although requiring a more complicated manufacturing process, on the one hand promote a more rational utilisation of available structural timber resources, while on the other hand they restrict the use of metal fasteners.

Feed Force and Sawdust Geometry in Particleboard Sawing.

The measurement of cutting forces permits building of physic-mechanical cutting models for a better understanding of the phenomena observed during cutting. It also permits the design and optimization of processes, machines, tools, and wood preparation. Optimization of cutting conditions of wood-based materials can decrease the cutting forces, which directly relates to the energy consumption and surface quality.

Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards.

Air pollution by wood dust in furniture production sites is an important hygiene issue. The dust is created by all types of wood and wood-based material machining, and its concentration in the working zone surrounding the machining stand depends on the effectiveness of the dust exhaust system. In present research, three setups of the dust extraction system for a conventional table sawing machine are considered while machining particleboards.

The influence of the thermal modification of pine (Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling: Fine dust creation in the plane milling of thermally modified pine wood.

Objectives: The aim of the study was to determine the effect of parameters of the thermal modification process and machining on the size distribution of dust particles of Scots pine (Pinus sylvestris L.) generated during lengthwise milling.

Method: Unmodified wood and thermally modified wood at temperatures of 130, 160, 190, and 220°C were milled lengthwise at cutting depths of 0.

Contamination of pine and birch wood dust with microscopic fungi and determination of its sterol contents.

Wood compounds, especially sterols, are connected with the level of contamination with microscopic fungi. Within this study, tests were conducted on wood dust samples collected at various work stations in a pine and birch timber conversion plant. Their contamination with mycobiota was measured as the concentration of ergosterol (ERG) by ultra performance liquid chromatography (UPLC).

The evaluation of microfungal contamination of dust created during woodworking in furniture factories.

Background: Microscopic fungi are the biological agent of occupational risk in the woodworking environment. Microbiological and chemical methods were used for determination of their concentration and species composition in dust.

Material And Methods: Dust was sampled in 3 factories producing furniture using different materials.

Response of ocular pemphigus vulgaris to therapy. Case report and review of literature.

Background: Pemphigus vulgaris is an autoimmune bullous disease characterized by blistering and erosions within skin and mucous membranes. Lesions appear most commonly on mucosal surfaces of the oral cavity. Ocular involvement in patients with PV has rarely been reported.

Intralesional recombinant interferon beta-1a in the treatment of basal cell carcinoma: results of an open-label multicentre study.

Although effective conventional therapies are available to treat basal cell carcinoma (BCC), undesirable side effects, including scarring, and in some cases permanent damage, often occur in problematic areas of the body, especially around the eyes, mouth, and cartilage of the nose and ears. In previous studies, intratumoural injection of recombinant interferon beta-1a (rIFN-beta-1a) has been shown to result in complete remission (CR) in 47% to 86% of patients with BETACC. The primary objective of the study was to determine the response rate to rIFN-beta-1a, in a larger BETACC patient population.

[Human papillomavirus (HPV) in laryngeal leukoplakia].

Epidemiological data and results of molecular studies suggest that human papillomavirus could be considered a risk factor for the upper respiratory tract cancers. HPV infection plays also the important role in the laryngeal precancerous states. Six out of 16 studied cases of laryngeal leukoplakia revealed presence of HPV DNA (37.

Parakeratosis variegata: a possible role of environmental hazards?

We report 2 cases of parakeratosis variegata (PV) evolving from lesions beginning with characteristics of ashy dermatosis. Both patients presented with a reticulated, poikilodermatous and hyperpigmented eruption with bizarre coalescent lichenoid papules. Histology showed lichenoid epidermotropic infiltrates, more pronounced in case No.

Recombinant interferon beta gel as an adjuvant in the treatment of recurrent genital warts: results of a placebo-controlled double-blind study in 120 patients.

Background: Pilot studies of adjuvant therapy with topically applied interferons (IFN) have shown promising results in reducing the recurrence of condylomata acuminata (CA).

Objective: The aim of this multicenter placebo-controlled, double-blind study was to confirm the efficacy and safety of topically applied IFN in a large sample of patients.

Methods: After removal of CA by CO2 laser surgery, electrocautery or cryosurgery, 120 patients applied either recombinant IFN-beta (0.

Serum levels of soluble tumor-necrosis-factor receptors in patients with benign and malignant HPV-associated anogenital lesions.

The levels of type-I and type-II soluble TNF-alpha receptors (sTNF-Rs) were evaluated in sera from patients with various human-papillomavirus-(HPV)-associated benign and malignant anogenital lesions using specific enzyme-linked immunobiological assays. In patients with benign HPV6/11-associated condylomata acuminata, the levels of sTNF-RI were significantly increased, while sTNF-RII were in normal range. Both types of sTNF-Rs were in normal range in patients with benign HPV16-associated grade-I/II and grade-III cervical intra-epithelial neoplasia.

[Acute ocular symptoms in Stevens-Johnson Syndrome].

A case of a 38-year-old man with acute ocular manifestation and severe dermatological lesions of Stevens-Johnson syndrome is presented. Intensive ophthalmological care may prevent long-term complications such as symblepharon, dry eye syndrome and corneal lesions.

Endomysium and gliadin IgA antibodies in children with coeliac disease.

The diagnostic sensitivity and specificity of IgA endomysium antibodies (EmA) and IgA gliadin antibodies (AGA) for coeliac disease (CD) were studied in Swedish children. Indirect immunofluorescence was used for demonstration of EmA and the diffusion-in-gel enzyme-linked immunosorbent assay method for AGA. Serum samples were collected and analysed from 77 consecutive children undergoing small-intestinal biopsy on recognized clinical indications.

[Human papilloma virus infection in the case of larynx carcinoma].

The case of 59 year old man treated for larynx carcinoma was presented. The potentially oncogenic human papillomavirus type 16/18 was detected in the tissue surrounding the tumor.

Abrogated NK-cell lysis of human papillomavirus (HPV)-16-bearing keratinocytes in patients with pre-cancerous and cancerous HPV-induced anogenital lesions.

Natural-cell-mediated cytotoxicity against K-562 erythroleukemic cells and human papillomavirus (HPV)-16 harboring Sk-v keratinocytes was tested in 38 age- and sex-matched healthy volunteers and in patients with HPV-induced benign and malignant anogenital lesions: 9 persons with HPV-16-induced bowenoid papulosis (BP), 8 with anogenital carcinomas (5 with HPV-16- or 33-associated squamous-cell carcinomas of Bowen's type and 3 with HPV-6-associated Buschke-Loewenstein verrucous carcinomas) and 12 with HPV-6-induced condylomata acuminata. Both K-562 and Sk-v cells were killed by a non-adherent CD16+ subset of PBMC as revealed by cell fractionation on the basis of their adherence to plastic and by treatment with Leu-IIb monoclonal antibody (MAb) and complement. "Cold" target competitive assays demonstrated that both cell types inhibited lysis of labelled Sk-v cells.