نتایج جستجو برای: mdf کامپوزیت
تعداد نتایج: 6115 فیلتر نتایج به سال:
Aberrant crypt foci (ACF) originally described in rodents treated with colon-specific carcinogens have been identified also in humans at high risk of colon cancer (CRC) and are extensively used as cancer biomarkers. However, studies documenting the heterogeneity of ACF have questioned their precancerous nature. Recently, we described dysplastic foci depleted of mucins (MDF) in the colon of rats...
If G = (V, E, σ) is a finite signed graph, a function f : V → {−1, 0, 1} is a minusdominating function (MDF) of G if f(u) +summation over all vertices v∈N(u) of σ(uv)f(v) ≥ 1 for all u ∈ V . In this paper we characterize signed paths and cycles admitting an MDF.
Invasive Acacia species can alter nutrient cycling processes in forest ecosystems, particularly affecting total litterfall production and litter decomposition patterns. This study examined the effects of exotic mangium Willd. on production, concentrations leaf fractions, decomposition, release lowland heath (HF) mixed dipterocarp forests (MDF) Brunei Darussalam, Borneo. Above-ground traps were ...
The objective of this study was to develop predictive expressions for estimating the withdrawal force capacity various size beech (Fagus orientalis) dowels from medium density fiberboard (MDF) and particleboard (PB). Furthermore, effects base material type, dowel diameter, penetration adhesive type on were investigated. Polyurethane (PU), polyvinyl acetate based D2, (PVA) adhesives utilized glu...
هدف از این مقاله بررسی ویژگیهای فیزیکی و مکانیکی چندسازههای چوب پرکاربرد در بازار ایران قبل و بعد از کهنگی تسریعیافته بود. فرایند چند مرحلهای کهنگی تسریعشده طبق استاندارد ASTM D-1037 انجامگرفت. نمونههای مورد مطالعه از چهار نوع تخته خرده چوب صنعتی و یک نوع تخته فیبر (MDF) که از مواد لیگنوسلولزی چوبی و غیرچوبی ساخته شده بودند از شرکتهای مختلف تهیه شدند. ویژگیهای فیزیکی شامل دانسیته، ...
The purpose of this research is to investigate the impact moisture content, closing speed, and pressurizing speed hot press on density, uniformity density distribution, properties Medium Density Fiberboard (MDF) products. Moisture content affects plasticity, heat conductivity, hydrolysis reaction fiber appropriate ensures quality board. Excessive can lead defects such as pollution bubbles surfa...
Wireless broadcasting system is of major two types namely push-based and pull-based. Extensible Markup Language (XML) is used to represent any information due to its inherent potential features such as scalable, self-describing, etc. Hence XML is chosen as standard for information dissemination in wireless broadcasting systems. Push based system periodically broadcasts XML data over the wireles...
While designing working metaheuristics can be straightforward, tuning them to solve the underlying combinatorial optimization problem well can be tricky. Several tuning methods have been proposed but they do not address the new aspect of our proposed classification of the metaheuristic tuning problem: tuning search strategies. We propose a tuning methodology based on Visual Diagnosis and a gene...
We have used the ACS camera on HST to obtain (V, I) photometry for 57,000 red-giant stars in the halo of the Leo elliptical NGC 3377, an intermediateluminosity elliptical. We use this sample of stars to derive the metallicity distribution function (MDF) for its halo field stars, and comment on its chemical evolution history compared with both larger and smaller E galaxies. Our ACS/WFC field spa...
A model is described which explains drag reduction (DR) in dilute polymer solutions in terms of solvation of macromolecular chains and formation of relatively stable domains. The domains partly suppress the vortex formation, act as energy sinks, and also play a role in mechanical degradation in flow (MDF). We report ultrasonically determined solvation numbers for a series of copolymers with the...
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