Following A Glittering Trail: Geo-Chemical and Petrographic Characterization of Micaceous Sherds Recovered from Dismal River Sites

2016 ◽  
Vol 81 (2) ◽  
pp. 364-374 ◽  
Author(s):  
Sarah Trabert ◽  
Sunday Eiselt ◽  
David V. Hill ◽  
Jeffrey Ferguson ◽  
Margaret Beck

AbstractProtohistoric Ancestral Apache Dismal River groups (A.D. 1600–1750) participated in large exchange networks linking them to other peoples on the Plains and U.S. Southwest. Ceramic vessels made from micaceous materials appear at many Dismal River sites, and micaceous pottery recovered from the Central High Plains is typically seen as evidence for interaction with northern Rio Grande pueblos. However, few mineral or chemical characterization analyses have been conducted on these ceramics, and the term “micaceous” has been applied to a broad range of vessel types regardless of the form, size, or amount of mica in their pastes. Our recent analyses, including macroscopic evaluation combined with petrography and neutron activation analyses (NAA), indicate that only a small subset of Dismal River sherds are derived from New Mexico clays. The rest were likely manufactured using materials from Colorado and Wyoming. Seasonal mobility patterns may have given Dismal River potters the opportunity to collect mica raw materials as they traveled between the Central Plains and Front Range, and this has implications for the importance of internal Plains social networks during the Protohistoric and Historic periods.

2019 ◽  
Vol 323 (2) ◽  
pp. 861-874
Author(s):  
Predrag Kuzmanović ◽  
Nataša Todorović ◽  
Jovana Nikolov ◽  
Jovana Knežević ◽  
Bojan Miljević

2019 ◽  
Vol 11 (7) ◽  
pp. 1995 ◽  
Author(s):  
Sabrina Cajamarca ◽  
Douglas Martins ◽  
Juscimar da Silva ◽  
Mariana Fontenelle ◽  
Ítalo Guedes ◽  
...  

Several agro-industrial, livestock, and food wastes can be recycled to create biofertilizers. This diversity of raw materials can result in nutritional imbalance and an increase in heavy metal content, which could make the final product unfeasible. Thus, the chemical characterization of the raw materials and their influence on the sustainable and safe production of biofertilizers need to be better understood. In this context, the objective of the present study was to evaluate the chemical characteristics of agro-industrial residues used in the manufacture of an aerobic liquid biofertilizer. We analyzed the macronutrient, micronutrient, and trace metal contents of seven waste products used as raw materials to create a biofertilizer. In addition, a survey of secondary biofertilizer data from different residues was carried out that showed great heterogeneity in the chemical compositions of these residues, which has a direct impact on the agronomic efficiency of these biofertilizers. The characterization revealed that some materials may be contaminants of the soil, due to high levels of trace metals, especially cadmium. We conclude that the generation of detailed inventories, such as those of the nutrient and heavy metal contents of the raw materials and biofertilizers produced, is indispensable for the correct recommendation of biologically-based inputs in agriculture.


Holzforschung ◽  
2016 ◽  
Vol 70 (9) ◽  
pp. 819-828 ◽  
Author(s):  
Caroline Sartori ◽  
Graciene da Silva Mota ◽  
Joana Ferreira ◽  
Isabel Miranda ◽  
Fábio Akira Mori ◽  
...  

Abstract Eucalyptus urophylla hybrids are important raw materials for the forest industry in Brazil, and large quantities of barks are available at mill site that may be used for added-value products. The chemical composition of barks of six commercial hybrids clones of E. urophylla×E. grandis, E. urophylla×E. Camaldulensis, and undisclosed E. urophylla hybrids was studied. The hybrids had similar composition, on average (data based on oven dry bark): 16% extractives, mainly corresponding to polar compounds that are soluble in ethanol and water, 19% lignin, 47% polysaccharides, 1% suberin, and 2% ash. The polysaccharides consists mainly of cellulose as indicated by 84% of total neutral monosaccharides in the acid hydrolysate and 10% xylose. The compositions of the lipophilic extracts was determined by GC-MS before and after alkaline hydrolysis. In all the barks, fatty acids, and triterpenes (namely: betulinic and ursolic acids) were the most abundant compounds followed by smaller amounts of sterols, long-chain aliphatic alcohols, phenolic acids, and acylglycerols. The ethanol-water bark extract had a high phenolic content: total phenolics ranged 211–551 mg gallic acid equivalents (GAE) g-1 of extract, tannins 76–184 mg catechin equivalents (CE) g-1 extract, and flavonoids 98–234 mg CE g-1 of extract. The antioxidant activity corresponds to 338 mg Trolox g-1 of extract. Development of high-value products is proposed through an integrated biorefinery approach including valorisation of extractives and targeting for cellulose-based applications.


2021 ◽  
Vol 11 (6) ◽  
pp. 51-53
Author(s):  
Kundan Patil

Calcium is one of the essential elements for living beings. As a supplement, it is used to treat Calcium deficiencies due to a calcium deficient diet. In Rasaratnasamuchchaya Calcium bhasma (Eggshell bhasma) is included as a rich calcium supplement. There is a need for work on the determination of the percentage of Calcium in the eggshell and its limit of acceptance. Easy absorption of bhasma in the body is possible when its preparation is carried out in an acidic medium. Lemon juice is one of the acidic mediums employed for this purpose at pH 2.4. The eggshell powder is subjected to five calcination cycles to convert it into the Bhasma. Analysis of Eggshell Bhasma has been done by various modern analytical techniques to determine its exact chemical compositions. Various instrumental methods like XRD, FTIR, and SEM have been incorporated for analysis of raw materials, intermediates as well as final products. The calcium carbonate present in eggshells is in calcite form. In the present work, structural and chemical characterization of eggshell bhasma was carried out to develop an analytical profile of it.


2021 ◽  
Vol 6 (3) ◽  
pp. 137-143
Author(s):  
Ummi Hiras Habisukan ◽  
Elfita Elfita ◽  
Hary Widjajanti ◽  
Arum Setiawan

Endophytic fungi are microorganisms that live in plants, without negative effects and are mutually related to hosting plants. Exploration of bioactive compounds from Endophytic fungi is easier and cheaper because they do not require a large area, a short growing time, and uncomplicated mixed compounds. Endophytic fungi are new and patent base secondary metabolites but they are not extensively characterized and investigated for the exploration of raw materials for drugs. The purpose of this study was to obtain antioxidant secondary metabolites from Endophytic fungi that live in the Syzygium aqueum medicinal plant. In this study, Endophyticfungi were isolated from S. aqueum twigs and molecular identification. The secondary metabolites were isolated by chromatographic method and chemical structure identified by spectroscopy. Antioxidant activity was evaluated by method 1,1diphenyl-2-picryl hydrazyl (DPPH). Phylogenetic analysis showed the Endophytic fungi of S. aqueum twig have a high similarity with the Trichordema reecei twig 19MSr.B2.3. The secondary metabolites from the ethyl acetate extract of the liquid culture of the fungus were identified as (4-hydroxy-3-(4-hydroxyphenyl)-5 oxotetrahydrofuran-2-yl) methyl acetate with IC50= 75.13 ????g/mL. The secondary metabolites can be developed into starting molecules for potential antioxidant agents.


2019 ◽  
Vol 20 (2) ◽  
Author(s):  
Halina Ekiert ◽  
Agnieszka Sondej ◽  
Karolina Jafernik ◽  
Agnieszka Szopa

The European Pharmacopoeia, Supplement 9.4, one of the newest published pharmacopoeial documents, besides new saponin-bearing raw materials (Bupleuri radix and Platycodi radix) characterized in part 1 and 2 of the series of articles, lists also other new plant raw materials, long known in traditional Chinese medicine (TCM) but earlier unknown in official European medicine. Part 3 of the series of articles presents botanical, ecological and chemical characterization of Ligusticum chuanxiong – Sechuan lovage. Rhizome of this species – Ligustici chuanxiong rhizoma is an essential oil-bearing raw material that has long been used in TCM to treat most of all different gynecological ailments and pain of different etiologies. Professional scientific studies documented a wide range of its possible therapeutic applications, e.g. improvement of the cardiovascular system function, and its antioxidant and anticancer properties. A review of pharmacological studies of this raw material was subject to most attention in the article. The aim of the article is to present basic knowledge on Sechuan lovage, which appears indispensable in professional contacts of pharmacists, medical doctors and phytotherapists with patients.


Catalyst reduces the activation energy of molecules and is generally composed of an active part distributed on a large surfaced stable support or ligand. Since the catalytic reactions occur at the surface of the catalyst, this necessitates the method of catalysts preparation after suitable pretreatment to have an active, moderately high and accessible surface area. Also, the pretreated catalysts should have sufficient mechanical strength and stability so that the particles will remain relatively unchanged during their use as catalysts. Nanosize metal oxide catalysts deposited on alpha-alumina are prepared using combustion synthesis in the present work. Alumina acts as support, a promoter as well as a catalyst in this process. Aluminum nitrate, cobaltous chloride, nickel chloride, ammonium molybdate, and urea are used as raw materials to synthesize cobalt-nickel-molybdenum on alumina by combustion method. The solution at 500oC in a muffle furnace produced voluminous solid within 5 minutes. Particle size, morphology, chemical characterization of the sample were analyzed by scanning electron microscopy (500 nm), X-ray diffraction, and energy disperses X-ray analysis techniques. The results showed that the concentration of nickel among all three promoters was the least. Increasing levels of carbon dioxide in the atmosphere have detrimental effects such as an increase in temperatures, melting of glaciers, the rise in the levels of seas and oceans, submergence of low-lying land areas and disruptions in the ecological cycles. In order to combat this, the present work was extended to convert carbon dioxide to carbon monoxide by reverse water gas shift reaction. Carbon monoxide can be later used to produce methanol and dimethyl ether which has a higher calorific value. Present process was carried out in a pilot-scale high-pressure reactor at 400 ℃ and 7 bar using nanoparticles of nickel-cobalt-molybdenum on alumina. Product stream was analyzed by gas chromatography with a thermal conductivity detector.


2021 ◽  
Vol 1197 (1) ◽  
pp. 012001
Author(s):  
Mani Axel ◽  
Duan Zhibo

Abstract The Chinese coastal areas are the environment of multiple activities, and navigation occupies an important place. Dredging operations maintain access to port structures carried out regularly. These sediments’ fate is problematic in Jiangsu province due to significant contamination of organic and mineral pollutants. A company called Nature Way aims to solve this problem. It is deeply committed to the treatment and use of sediment dredged from the seabed and uses proprietary solidification technology to transform all kinds of silt waste into new engineered materials that replace sand and sand. Gravel and traditional techniques and can be used as foundation materials for various projects in loose soil areas. In this work, we first studied the physic-chemical characterization of raw materials sediments supplied by Nature Way Corporation from Jiangsu province. Secondly, we have to mix the raw sediment and the solidifying agents and test the mechanical performance at 3%, 5% and 7% in a time interval of 7 days, 14 days, and 28 days. Finally, we have to measure the (CBR) “California Bearing Ratio” after 28 days, mix with the binder at 3%, 5%, 7%.


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