Results 101 to 110 of about 92,049 (241)

Neoarchean Arc Magmatism and Crust Recycling in the Northern Marginal Zone of the Limpopo Complex, Zimbabwe: New Insights From Zircon U‐Pb‐Hf Isotopes of a Charnockite Suite

Geological Journal, EarlyView.
Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae, Md. Sazzadur Rahman, Gao Pin, M. Santosh, Wataru Fujisaki, Sam Uthup, Prince Mandingaisa   +6 more
wiley   +1 more source

Effect of Chitosan Addition on Porosity of Rice Husk Calcium Silicate Used for Free Fatty Acid Adsorbent from Palm Oil [PDF]

Studies have been done on developing calcium silicate pores derived from rice husk with and without including chitosan as a template. The chitosan solution was supplemented with sodium silicate derived from rice husk, and then CaCl2 was added.
Butarbutar, Olwin, Lumban Raja, Saur
core   +1 more source

Effects of sodium ions on synthesized alkali silica reaction gels [PDF]

, 2015
The alkali-silica reaction (ASR), leading to serious structural degradation, is the chemical reaction between reactive silica presenting in aggregates and hydroxyl ions from cement paste or pore solution. Although the chemical mechanism of ASR attack has
De Schutter, Geert, Taerwe, Luc, Ye, Guang, Zheng, Kunpeng   +3 more
core   +1 more source

Recent advances in additive manufacturing for solar cell based on organic/inorganic hybrid materials

InfoMat, EarlyView.
The main contents of the article can be divided into four sections: (1) An overview of the most widely studied solar cell structures and the main factors limiting their development; (2) Novel applications of traditional thin film fabrication methods for solar cells; (3) Novel applications of advanced additive manufacturing techniques in solar cell ...
Ziyue Ju, Ruichan Lv, Anees A. Ansari, Jun Lin   +3 more
wiley   +1 more source

Ruthenium Nanozyme@Magnesium silicate nanosheets encapsuled in microneedle patches promote repair of radiation‐induced skin defects by remodeling pathological environment

Interdisciplinary Medicine, EarlyView.
In this work, we introduce a novel composite microneedle (MN) patch that integrates ruthenium‐loaded magnesium silicate nanosheets (MSR) as a multifaceted therapeutic platform with oxidative stress mitigation, ROS generation inhibition and cellular signaling pathways restoration for treating RISD.
Zhongyi Sun, Haibo Liu, Mengting Yin, Ningning Cheng, Wencheng Liu, Kangkang Zhao, Hua Zeng, Xuming Chen, Zijie Wang, Xuhui Zhou, Xinyu Zhao, Feng Chen   +11 more
wiley   +1 more source

Combining Density Fractionation and Ca K‐Edge XANES Reveals Contrasting SOM–Mineral Association Patterns Shaped by Parent Material in Forest Soil O Horizons

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Soil organic matter (SOM) accumulation in forest soils is strongly influenced by interactions with inorganic constituents derived from parent material mineralogy. However, their role in the forest floor remains underexplored.
Gabriela Villalba‐Ayala, Luis Carlos Colocho Hurtarte, Wantana Klysubun, Jörg Prietzel   +3 more
wiley   +1 more source

Determining Exchangeable Base Cations in Forest Soils: A Comparison of Three Methods

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background Accurately determining exchangeable base cations is critical for assessing base cation depletion in acid forest soils, where various extraction methods may yield different results. Aim The aim was to quantify differences in the effectiveness of BaCl2, NH4OAc (pH 7), and Cohex methods in extracting base cations from acid forest soils
Jon Petter Gustafsson, Marloes Groeneveld, Erik Karltun, Christofer Engberg Hydén, Johan Stendahl   +4 more
wiley   +1 more source

Structure of nanocrystalline calcium silicate hydrates [PDF]

, 2014
Nanocrystalline calcium silicate hydrates (C-S-H) are the main hydration products and the main binging phases in many types of cement, including ordinary Portland cement. As a result of its ubiquity is these engineered systems, C-S-H controls main cement physical and chemical properties. These properties depend on C-S-H calcium to silicon atomic ratio (
Grangeon, Sylvain, Claret, Francis, Lerouge, Catherine, Lanson, Bruno   +3 more
openaire   +2 more sources

Potential pitfalls when using popular chemical extractions to characterize Al‐ and Fe‐containing soil constituents

Journal of Plant Nutrition and Soil Science, EarlyView.
Abstract Wet‐chemical extraction of soil to quantify pedogenic species or to remove specific compounds prior to other analyses is an established approach in analytical soil mineralogy and soil chemistry. Interpretation and informational value of data derived from long‐established and frequently used extractions, for instance involving dithionite ...
Thilo Rennert, Katharina R. Lenhardt
wiley   +1 more source

Interstratified Illite‐Hydroxy‐Interlayered Smectite—A Disorder Structure Model for Quantification Using Rietveld Refinement

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Background The acidic weathering of soils is known as a problem for decades. It leads to the deterioration of essential soil properties, including soil fertility, water, or cation buffering capacity due to solution and solid storage of Al3+ by polymerization in the interlayer of (former) swellable clay minerals.
Jan Dietel, Kristian Ufer, Jens Gröger‐Trampe, Stephan Kaufhold, Reiner Dohrmann   +4 more
wiley   +1 more source