Results 121 to 130 of about 22,613 (275)

Can Wapiti (Cervus elaphus) Browsing Stimulate the Chemical Defense of Taxus cuspidata—A Case of Northeast China Tiger and Leopard National Park

open access: yesIntegrative Zoology, EarlyView.
We study that browsing by wapiti reduces the growth of saplings, and it develop chemical defenses to prevent themselves browsed again. These results reduce our concern about wapiti browse T. cuspidate saplings, and provide basic data for the study of the interaction between them, and also provide theoretical basis for the population restoration and ...
Jianan Feng   +3 more
wiley   +1 more source

Different optical methods for clinical monitoring of the microcirculation [PDF]

open access: yes, 2002
Christ, Frank   +5 more
core   +1 more source

Temporal and geographical patterns of nitazene detections in drug samples and biospecimens in the United States, 2019–2024

open access: yesAddiction, EarlyView.
Abstract Background and aims Nitazenes are a novel subclass of synthetic opioids that have been increasingly implicated in the United States (US) overdose crisis. Despite their growing presence in the illicit drug supply, national trends have not been systematically evaluated.
David T. Zhu   +3 more
wiley   +1 more source

On-line measurement of some selected soil properties for controlled input crop management systems [PDF]

open access: yes, 2012
The evaluation of the soil spatial variability using a fast, robust and cheap tool is one of the key steps towards the implementation of Precision Agriculture (PA) successfully. Soil organic carbon (OC), soil total nitrogen (TN) and soil moisture content
Kuang, Boyan Y.
core  

Photodegradation of commercial insect repellents containing DEET and IR‐3535 under ultraviolet light associated or not with chemical ultraviolet filters evaluated by Raman spectroscopy

open access: yesPhotochemistry and Photobiology, EarlyView.
This study evaluated the photodegradation of commercial insect repellents containing DEET and IR‐3535 under UV‐A and UV‐B irradiation using Raman spectroscopy. Pure DEET and IR‐3535 showed intrinsic photostability, whereas DEET diluted in ethanol and a commercial DEET‐based formulation exhibited significant spectral changes after UV exposure.
Viviane Gadret Borio   +4 more
wiley   +1 more source

Early Detection of Brown Rot Decay in Douglas-Fir and Southern Yellow Pine by Infrared Spectrophotometry

open access: yes, 2007
Samples of Douglas-fir heartwood and southern yellow pine sapwood were incubated with several brown rot rungi and examined for decomposition as shown by weight losses (to 10%).
Gibson, David G.   +2 more
core  

Spectrophotometry and Chromatography for Identification of Antioxidants and Accelerators in Rubber Mixtures

open access: yes, 1963
The difficulties encountered in the identification of antioxidants and accelerators in rubber mixtures are reviewed. A method of column chromatographic separation of components contained in the mixture extracts is discussed.
G. Bonomi, A. Fiorenza, R. Piacentini
core   +1 more source

Removal of Real Vegetable Oil Industry Wastewater by Electrocoagulation and Electroflotation Methods

open access: yesWater and Environment Journal, EarlyView.
This study investigated the effective treatment of real vegetable oil industry wastewater with high pollutant content using electrocoagulation and electroflotation processes with SS316 mesh electrodes. ABSTRACT This study investigated the applicability of environmentally friendly technologies for treating vegetable oil industry wastewater containing ...
Talip Turna, Yalçın Şevki Yıldız
wiley   +1 more source

Hyperspectral imaging for the remote sensing of blood oxygenation and emotions [PDF]

open access: yes, 2012
This PhD project is a basic research and it concerns with how human’s physiological features, such as tissue oxygen saturation (StO2), can be captured from a stand-off distance and then to understand how this remotely acquired physiological feature ...
Chen, Tong
core  

The characterization of linear polyethylene SRM 1475. II. Determination of total methyl content by infrared spectrophotometry

open access: yes, 1972
An ASTM method was used to determine the methyl content of linear polyethylene SRM 1475 by measuring the absorbance at 1378 cm-1 (7.25 nm) of methyl groups on compensated infrared spectra.
Brown, James E.
core   +1 more source

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