PubAg

Main content area

You searched for: Subject "raw materials" Remove constraint Subject: "raw materials"
Start Over

Search

11,322  Search Results

« Previous | 1 - 20 of 11,322 |
Number of results to display per page

Search Results

1. Functional differentiation and possible regional specialisation of the Vinča culture settlements: Viewpoint from osseous and lithic industries

Author:
Vitezović, Selena; Antonović, Dragana
Source:
Quaternary international 2020 v.539 pp. 39-48
ISSN:
1040-6182
Subject:
raw materials,   etc   ; industry; Greece;     Show all 3 Subjects
Abstract:
... Late Neolithic/Early Eneolithic Vinča culture is marked by permanent, long-living settlements, increased production of different craft goods and early metallurgical activities. Economic activities were rich and diverse, and included not only strictly subsistence related ones, but also production of luxurious, prestige, “special” objects, such as figurines, personal ornaments, and many more. Furthe ...
DOI:
10.1016/j.quaint.2018.12.029

2. Consecutive and progressive purification of food-derived natural polysaccharide: Based on material, extraction process and crude polysaccharide

Author:
Tang, Wei; Liu, Dan; Yin, Jun-Yi; Nie, Shao-Ping
Source:
Trends in food science & technology 2020 v.99 pp. 76-87
ISSN:
0924-2244
Subject:
raw materials,   etc   ; bioactive properties; polysaccharides; purification methods;     Show all 4 Subjects
Abstract:
... Food-derived natural polysaccharides are attracting increasing attention in fields of food and healthy product, and the purification of polysaccharide is indispensable for the study. Currently, purification process mostly focuses on crude polysaccharide, while the importance of polysaccharide purification in the processes of raw material and polysaccharide extraction are easily ignored.This review ...
DOI:
10.1016/j.tifs.2020.02.015

3. A review of methods and data to determine raw material criticality

Author:
Schrijvers, Dieuwertje; Hool, Alessandra; Blengini, Gian Andrea; Chen, Wei-Qiang; Dewulf, Jo; Eggert, Roderick; van Ellen, Layla; Gauss, Roland; Goddin, James; Habib, Komal; Hagelüken, Christian; Hirohata, Atsufumi; Hofmann-Amtenbrink, Margarethe; Kosmol, Jan; Le Gleuher, Maïté; Grohol, Milan; Ku, Anthony; Lee, Min-Ha; Liu, Gang; Nansai, Keisuke; Nuss, Philip; Peck, David; Reller, Armin; Sonnemann, Guido; Tercero, Luis; Thorenz, Andrea; Wäger, Patrick A.
Source:
Resources, conservation, and recycling 2020 v.155 pp. 104617
ISSN:
0921-3449
Subject:
raw materials,   etc   ; data quality; experts; risk; uncertainty;     Show all 5 Subjects
Abstract:
... The assessment of the criticality of raw materials allows the identification of the likelihood of a supply disruption of a material and the vulnerability of a system (e.g. a national economy, technology, or company) to this disruption. Inconclusive outcomes of various studies suggest that criticality assessments would benefit from the identification of best practices. To prepare the field for such ...
DOI:
10.1016/j.resconrec.2019.104617

4. Raw material procurement as a crucial factor determining knapping technology in the Katta Sai complex of Middle Palaeolithic sites in the western Tian Shan piedmonts of Uzbekistan

Author:
Kot, Małgorzata; Pavlenok, Konstantin; Krajcarz, Maciej T.; Pavlenok, Galina; Shnaider, Svetlana; Khudjanazarov, Mukhiddin; Leloch, Michał; Szymczak, Karol
Source:
Quaternary international 2020
ISSN:
1040-6182
Subject:
raw materials,   etc   ; blades; piedmont; rivers; rocks; Uzbekistan;     Show all 6 Subjects
Abstract:
... This paper presents the results of the study of raw material procurement on two late Middle Paleolithic sites, Katta Sai 1 and Katta Sai 2, located in the western Tian Shan piedmont. The previous studies allowed to identify an unknown Levallois variant of human cultural adaptation in the regional Middle Paleolithic. Predetermined flake technology focused on obtaining the thin triangular flakes or ...
DOI:
10.1016/j.quaint.2020.03.052

5. A non-targeted high-resolution mass spectrometry approach for the assessment of the geographical origin of durum wheat

Author:
Cavanna, Daniele; Loffi, Cecilia; Dall'Asta, Chiara; Suman, Michele
Source:
Food chemistry 2020 v.317 pp. 126366
ISSN:
0308-8146
Subject:
raw materials,   etc   ; durum wheat; mass spectrometry; pasta; provenance;     Show all 5 Subjects
Abstract:
... The assessment of durum wheat geographical origin is an important and emerging challenge, due to the added value that a claim of origin could provide to the raw material itself, and subsequently to the final products (i.e. pasta).Up to now, the typical approach presented in literature is the evaluation of different isotopic ratios of the elements, but other techniques could represent an interestin ...
DOI:
10.1016/j.foodchem.2020.126366

6. An ontology-based method of knowledge modelling for remanufacturing process planning

Author:
He, Yan; Hao, Chuanpeng; Wang, Yulin; Li, Yufeng; Wang, Yan; Huang, Lingyu; Tian, Xiaocheng
Source:
Journal of cleaner production 2020 v.258 pp. 120952
ISSN:
0959-6526
Subject:
raw materials,   etc   ; case studies; cost effectiveness; manufacturing; models; planning;     Show all 6 Subjects
Abstract:
... Remanufacturing that returns used products to a like-new condition with equivalent warranty to match is an emerging triple-win (environmental, economic and social) industry. Process planning plays a vital role in the success of remanufacturing. However, compared with traditional mass manufacturing, the design of remanufacturing process planning (RPP) is far more complex and time-consuming, heavily ...
DOI:
10.1016/j.jclepro.2020.120952

7. Functionalization and customization of polyurethanes for biosensing applications: A state-of-the-art review

Author:
Ahmadi, Younes; Kim, Ki-Hyun
Source:
Trends in analytical chemistry 2020 v.126 pp. 115881
ISSN:
0165-9936
Subject:
raw materials,   etc   ; biosensors; diagnostic techniques; electronic sensing; physicochemical properties; polyurethanes;     Show all 6 Subjects
Abstract:
... Polyurethane (PU) offers advantageous physical-chemical properties for the fabrication of smart electronic sensing devices through the selection of suitable raw materials, structural modification, modifying the soft and hard segments, changing the NCO:OH ratio, nanofiller dispersion, and chemical functionalization. Over the past few decades, PU has attracted attention as valuable media for the con ...
DOI:
10.1016/j.trac.2020.115881

8. The reinterpretation of the Cova Negra archaeological and stratigraphical sequence and its implications in the understanding of the Middle Palaeolithic Iberian Peninsula

Author:
Eixea, Aleix; Oltra, Isabela; Bergadà, M. Mercè; Villaverde, Valentín
Source:
Quaternary international 2020
ISSN:
1040-6182
Subject:
raw materials,   etc   ; Pleistocene epoch; archaeology; data analysis; fossils; Iberian Peninsula;     Show all 6 Subjects
Abstract:
... This paper presents new data from the reinterpretation of the Cova Negra sequence from a chronological and stratigraphic perspective. The primary aim is to reorder the lithic industry from the excavations of the 1950s in light of the stratigraphic sequence, paying particular attention to raw materials, knapping methods and tools. The reconstruction, carried out from a taphonomic perspective, is sp ...
DOI:
10.1016/j.quaint.2020.04.007

9. Bird procurement by humans during the Middle and early Upper Paleolithic of Europe: New data for the Aurignacian of southwestern France

Author:
Laroulandie, Véronique; Morin, Eugène; Soulier, Marie-Cécile; Castel, Jean-Christophe
Source:
Quaternary international 2020 v.543 pp. 16-24
ISSN:
1040-6182
Subject:
raw materials,   etc   ; archaeology; birds; bones; claws; humans; France;     Show all 7 Subjects
Abstract:
... Recently, the development of taphonomically-oriented studies of avifaunal assemblages have contributed towards renewing our perceptions of the complexity of Neandertal behavioral adaptations in Europe. In contrast, few studies have been conducted on bird samples dated to the Early Upper Paleolithic. Here, we provide new data for three archeological sites (Isturitz, le Piage, Abri Cellier) from sou ...
DOI:
10.1016/j.quaint.2020.03.034

10. Upper Palaeolithic grinding stones from Eastern European sites: An overview

Author:
Stepanova, Ksenia
Source:
Quaternary international 2020 v.541 pp. 162-181
ISSN:
1040-6182
Subject:
raw materials,   etc   ; archaeology; crushing; grinders; grinding; pigments; slabs; Europe;     Show all 8 Subjects
Abstract:
... Technological development in Europe around the end of the Middle and beginning of the Upper Palaeolithic was expressed not only in the new methods for working flint, bone, antler, etc., but also by appearance of processing food and raw materials by grinding, crushing and abrasion. Ground plant resources can be dried and stored for longer periods and are more digestible when cooked and eaten, while ...
DOI:
10.1016/j.quaint.2019.11.035

11. A review on the mechanical properties of textile structural composite T-beams

Author:
Ouyang, Yiwei; Wu, Xianyan
Source:
Textile research journal 2020 v.90 no.5-6 pp. 710-727
ISSN:
1746-7748
Subject:
raw materials,   etc   ; delamination; fabrics; mechanical properties; mixing; textile fibers;     Show all 6 Subjects
Abstract:
... In order to review the most effective ways to improve the mechanical properties of composite T-beams and further increase their application potential, research progress on the mechanical properties of textile structural composite T-beams was summarized based on two-dimensional (2-D) ply structure composite T-beams, delamination resistance enhanced 2-D ply structure T-beams, and three-dimensional ( ...
DOI:
10.1177/0040517519871259

12. Master sintering curves of nickel-titanium and nickel-titanium open-cell foams fabricated by spark plasma sintering

Author:
Nivala, Peter T.; James, Susan P.
Source:
Journal of materials science 2020 v.55 no.8 pp. 3668-3683
ISSN:
0022-2461
Subject:
raw materials,   etc   ; activation energy; copper; energy; foams; prediction;     Show all 6 Subjects
Abstract:
... Master sintering curves (MSCs) were developed for monolithic nickel-titanium (NiTi) and composite NiTi-copper specimens densified by spark plasma sintering (SPS) to efficiently establish the density–process parameter relationship. NiTi-copper specimens simulated the porogen (a.k.a. space holder) replication technique used to fabricate NiTi open-cell foams. The effect of copper porogens on the dens ...
DOI:
10.1007/s10853-019-04226-9

13. On the potential of lignin-containing cellulose nanofibrils (LCNFs): a review on properties and applications

Author:
Solala, Iina; Iglesias, Maria C.; Peresin, Maria S.
Source:
Cellulose 2020 v.27 no.4 pp. 1853-1877
ISSN:
0969-0239
Subject:
raw materials,   etc   ; cellulose; cellulose nanofibers; dewatering; emulsions; energy; lignin; nanocomposites;     Show all 8 Subjects
Abstract:
... This review outlines the present state and recent progress in the area of lignin-containing cellulose nanofibrils (LCNFs), an emerging family of green cellulose nanomaterials. Different types of LCNF raw materials are described, with main focus on wood-based raw materials, and the properties of the resulting LCNFs are compared. Common problems faced in industrial utilization of CNFs are discussed ...
DOI:
10.1007/s10570-019-02899-8

14. The effect of consistency on the shear rheology of aqueous suspensions of cellulose micro- and nanofibrils: a review

Author:
Koponen, Antti I.
Source:
Cellulose 2020 v.27 no.4 pp. 1879-1897
ISSN:
0969-0239
Subject:
raw materials,   etc   ; cellulose; hydrodynamics; nanofibers; rheological properties; rheology; uncertainty;     Show all 7 Subjects
Abstract:
... While the raw material type and the production method of cellulose micro- and nanofibrils (CMNFs) strongly affect the absolute values of the rheological parameters of their aqueous suspensions, the dependence of these parameters on consistency, c, is found to be uniform. The consistency index and yield stress of CMNF suspensions follow generally the scaling laws [Formula: see text] and [Formula: s ...
DOI:
10.1007/s10570-019-02908-w

15. Personal adornments in the Romanian Eneolithic: Local versus exotic raw materials

Author:
Mărgărit, Monica
Source:
Quaternary international 2020 v.539 pp. 49-61
ISSN:
1040-6182
Subject:
raw materials,   etc   ; Cyprinus carpio; Gastropoda; Unio; bones; processing stages; socioeconomics;     Show all 7 Subjects
Abstract:
... Prehistoric personal adornments have benefited from detailed studies because they are an inexhaustible source of reflection. From these objects can be identified the symbolic and religious behaviour of prehistoric groups; they may also reflect the socio-economic aspects of these communities and may even serve as markers of cultural boundaries and exchange networks in prehistory. Appreciating the c ...
DOI:
10.1016/j.quaint.2018.09.046

16. Mapping key process parameters to the performance of a continuous dry powder blender in a continuous direct compression system

Author:
Palmer, John; Reynolds, Gavin K.; Tahir, Furqan; Yadav, Indrajeetsinh K.; Meehan, Elizabeth; Holman, James; Bajwa, Gurjit
Source:
Powder technology 2020 v.362 pp. 659-670
ISSN:
0032-5910
Subject:
raw materials,   etc   ; acetaminophen; active pharmaceutical ingredients; experimental design; impellers; models;     Show all 6 Subjects
Abstract:
... This work aims to expand the typical raw material attributes that can successfully be processed on a continuous direct compression line with a particular focus on the continuous dry powder blender. Three grades of Acetaminophen were investigated as model active pharmaceutical ingredients and chosen to span a broad range of material attributes wider than what would normally be considered for a dire ...
DOI:
10.1016/j.powtec.2019.12.028

17. Impact of oxygen content in powders on the morphology of the laser molten tracks in preparation for additive manufacturing of silicon

Author:
Le Dantec, Marie; Güniat, Lucas; Leistner, Matthias; Figi, Renato; Bleiner, Davide; Leparoux, Marc; Hoffmann, Patrik
Source:
Powder technology 2020 v.361 pp. 704-710
ISSN:
0032-5910
Subject:
raw materials,   etc   ; manufacturing; melting; oxygen; pellets; powders; silicon; wavelengths;     Show all 8 Subjects
Abstract:
... Powder additive pulsed Nd:YAG laser (wavelength 1064 nm), with the aim of preparing AM of such material. The influence of oxygen content in the initial silicon powders on the continuous tracks morphology was investigated. It was found that the initial oxygen content of the processed powders must be lower than 0.1 wt% to produce a smooth silicon melted track. This result is explained as due to the ...
DOI:
10.1016/j.powtec.2019.11.052

18. Resource analysis model and validation for selective laser melting, constituting the potential of lightweight design for material efficiency

Author:
Pfaff, Aron; Bierdel, Marius; Hoschke, Klaus; Wickert, Matthias; Riedel, Werner; Hiermaier, Stefan
Source:
Sustainable Production and Consumption 2020 v.21 pp. 182-191
ISSN:
2352-5509
Subject:
raw materials,   etc   ; aluminum alloys; energy; manufacturing; mathematical models; melting;     Show all 6 Subjects
Abstract:
... Selective Laser Melting (SLM) offers significant potential for a sustainable way of production. Raw material in form of metallic powder can directly be reused and the selective nature of the process offers new potential for resource economization. We introduce a mathematical model, which allows conclusions about the influence of parameters like part volume (influenced by lightweight design) and ex ...
DOI:
10.1016/j.spc.2019.12.004

19. Spilled ink blots the mind: A reply to Merrit et al. (2018) on subjectivity and bone surface modifications

Author:
Domínguez-Rodrigo, Manuel; Saladié, Palmira; Cáceres, Isabel; Huguet, Rosa; Yravedra, José; Rodríguez-Hidalgo, Antonio; Patricia, Martín; Antonio, Pineda; Juan, Marín; Clara, Gené; Aramendi, Julia; Cobo-Sánchez, Lucia
Source:
Journal of archaeological science 2019 v.102 pp. 80-86
ISSN:
0305-4403
Subject:
raw materials,   etc   ; archaeology; data collection;     Show all 3 Subjects
Abstract:
... Categorical variables identifying microscopic features of cut marks produce high accuracy in discrimination of bone surface modifications, but are vulnerable to variable degrees of inter-analyst subjectivity. Metric analyses of cut mark width and depth are presented by Merritt et al. (2018) as a more objective method of identifying cut marks. However, this uni(bi)variate method has shown very high ...
DOI:
10.1016/j.jas.2018.09.003

20. Challenges, trends and opportunities in food processing

Author:
Augusto, Pedro ED
Source:
Current opinion in food science 2020 v.35 pp. 72-78
ISSN:
2214-7993
Subject:
raw materials,   etc   ; consumer attitudes; enzyme activity; food allergies; food microbiology; food processing; foods; models; nutrient retention;     Show all 9 Subjects
Abstract:
... This opinion paper discussed past, present and future challenges facing food processing. If new challenges can only be overcome using new approaches, new opportunities arise for food processing. The challenges were organized in topics such as safety, preservation, nutrition, sensorial, wellbeing, environmental and future possibilities. In each topic, traditional, emerging and re-emerging challenge ...
DOI:
10.1016/j.cofs.2020.03.005