scholarly journals Chemical Properties and Microbial Analysis of Waterlogged Archaeological Wood from the Nanhai No. 1 Shipwreck

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 587
Author(s):  
Yeqing Han ◽  
Jing Du ◽  
Xinduo Huang ◽  
Kaixuan Ma ◽  
Yu Wang ◽  
...  
Keyword(s):  
Song Dynasty ◽  
Chemical Properties ◽  
Wood Properties ◽  
Ash Content ◽  
Element Content ◽  
Chemical Components ◽  
Microbial Composition ◽  
Archaeological Wood ◽  
Cation Content ◽  
Southern Song

The Nanhai No. 1 was a wooden merchant ship of the Southern Song Dynasty, which wrecked and sank in the South China Sea, Yangjiang City, Guangdong Province, China. The Nanhai No. 1 shipwreck was salvaged as a whole in 2007 and began to be excavated in 2013. During the archaeology excavation, some of the hull wood fell off the hull. These waterlogged archaeological woods (WAW) were immersed in the buffer containing EDTA-2Na and isothiazolinone K100 for moisture stabilization, preliminary desalination, and microbial inhibition. We evaluated the properties of these WAW through testing the chemical components (including lignin, holocellulose, and ash content) of the wood, and monitoring the iron element content, anion and cation content in the buffer. At the same time, the microbial composition in the desalination buffer was also detected. The results showed that the holocellulose content in these WAW were much lower than in fresh wood. The ash content in these WAW decreased after desalination treatment. The iron element content, anion and cation content in the buffer were high and kept at a certain level after desalination treatment. At the same time, the problem of biodegradation in the buffer should be paid attention to. The comprehensive protection of WAW requires to combine wood properties and microbial problems. This study provides a reference for the protection of WAW from the Nanhai No. 1 shipwreck and other similar historical wood.

scholarly journals Assessment of Pellets from Three Forest Species: From Raw Material to End Use

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 447
Author(s):  
Miguel Alfonso Quiñones-Reveles ◽  
Víctor Manuel Ruiz-García ◽  
Sarai Ramos-Vargas ◽  
Benedicto Vargas-Larreta ◽  
Omar Masera-Cerutti ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Ash Content ◽  
Hot Water ◽  
Raw Material ◽  
Chemical Components ◽  
Energy Yield ◽  
Cellulose Content ◽  
Fixed Carbon ◽  
End Use ◽  
The Impact

This study aimed to evaluate and compare the relationship between chemical properties, energy efficiency, and emissions of wood and pellets from madroño Arbutus xalapensis Kunth, tázcate Juniperus deppeana Steud, and encino colorado Quercus sideroxyla Humb. & Bonpl. in two gasifiers (top-lit-up-draft (T-LUD) and electricity generation wood camp stove (EGWCS)) in order to determine the reduction of footprint carbon. In accordance with conventional methodologies, we determined the extracts and chemical components (lignin, cellulose, holocellulose), and the immediate analyses were carried out (volatile materials, fixed carbon, ash content and microanalysis of said ash), as well as the evaluation of emission factors (total suspended particulate matter (PM2.5), CO, CO2, CH4, black carbon (BC), elemental carbon (EC), and organic carbon (OC)). The results were statistically analyzed to compare each variable among species and gasifiers. The raw material analyzed showed how the pH ranged from 5.01 to 5.57, and the ash content ranged between 0.39 and 0.53%. The content values of Cu, Zn, Fe, Mg, and Ca ranged from 0.08 to 0.22, 0.18 to 0.19, 0.38 to 0.84, 1.75 to 1.90, and 3.62 to 3.74 mg kg−1, respectively. The extractive ranges from cyclohexane were 2.48–4.79%, acetone 2.42–4.08%, methanol 3.17–7.99%, and hot water 2.12–4.83%. The range of lignin was 18.08–28.60%. The cellulose content ranged from 43.30 to 53.90%, and holocellulose from 53.50 to 64.02%. The volatile material range was 81.2–87.42%, while fixed carbon was 11.30–17.48%; the higher heating value (HHV) of raw material and pellets presented the ranges 17.68–20.21 and 19.72–21.81 MJ kg−1, respectively. Thermal efficiency showed statistically significant differences (p < 0.05) between pellets and gasifiers, with an average of 31% Tier 3 in ISO (International Organization for Standardization) for the T-LUD and 14% (ISO Tier 1) for EGWCS, with Arbutus xalapensis being the species with the highest energy yield. The use of improved combustion devices, as well as that of selected raw material species, can reduce the impact of global warming by up to 33% on a cooking task compared to the three-stone burner.

scholarly journals Assessment of Guava (Psidium Guajava L.) Wood Biomass for Briquettes’ Production

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 613 ◽  
Author(s):  
Tatiana Ivanova ◽  
Amilkar Mendoza Hernández ◽  
Jiří Bradna ◽  
Eloy Fernández Cusimamani ◽  
Juan García Montoya ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chemical Elements ◽  
Chemical Properties ◽  
Calorific Value ◽  
Wood Properties ◽  
Psidium Guajava ◽  
Ash Content ◽  
International Standards ◽  
Published Data ◽  
Solid Biofuel

Residual biomass from guava (Psidium guajava L.), a common and widespread fruit tree native to Latin America, has been analyzed in the present research in order to determine the biomass quality and its potential use for energy purposes. Obtained biomass was grinded and compacted into the form of fuel briquettes. Determinations of solid biofuel parameters, i.e., physical, mechanical and chemical properties such as calorific value, moisture, ash content, volatile matter, mechanical durability, contents of the main chemical elements and heavy metals were performed according to international standards. As a result, not inconsiderable traces of heavy metals were found, with a concentration of zinc 4.57 mg kg−1 as the highest. Guava’s moisture content (9.8%) comfortably fulfilled the minimum standard requirements and the net calorific value as received (17.11 MJ kg−1) met the average value of a wood. However, measured sulphur content (0.063%) as well as ash content (3.74%) exceeded the maximum allowed limits for the graded wood briquettes and, therefore, guava wood briquettes should be rather categorized as non-woody A class briquettes. The results of the study can contribute significantly to the knowledge of guava wood properties and its potential as renewable solid fuel since there is little published data about it.

The effect of sugar beet fiber addition on the chemical properties of tortilla chips

2012 ◽  
pp. 385-388 ◽  
Author(s):  
Azadeh Saadatmandi ◽  
Mohammad Elahi ◽  
Reza Farhoosh ◽  
Mahdi Karimi
Keyword(s):  
Sugar Beet ◽  
Water Absorption ◽  
Protein Content ◽  
Chemical Properties ◽  
Absorption Capacity ◽  
Ash Content ◽  
Oil Absorption ◽  
Water Absorption Capacity ◽  
Overall Acceptability ◽  
Tortilla Chips

The incorporation of sugar beet fiber (0–5%) to tortilla chips and the effects on the chemical and sensory properties were studied. Addition of sugar beet fiber (SBF) led to an increasing of water absorption capacity, ash content and darkness while lowering the protein content and oil absorption. Sensory evaluation showed that the overall acceptability of tortilla chips reduces if adding more than 2% SBF.

scholarly journals Characterizing the sealing materials of the merchant ship Nanhai I of the Southern Song Dynasty

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Yihang Zhou ◽  
Kai Wang ◽  
Jian Sun ◽  
Yong Cui ◽  
Dongbo Hu
Keyword(s):  
Surface Coating ◽  
Song Dynasty ◽  
Weight Ratio ◽  
Tung Oil ◽  
Southern Song Dynasty ◽  
Southern Song ◽  
Merchant Ship ◽  
Main Components ◽  
Analytical Approaches ◽  
Sealing Materials

AbstractNanhai I is a highly valuable shipwreck of the Southern Song Dynasty for studying various topics, including the shipbuilding techniques. The sealing materials are of significant importance to ensure the ship’s reliability during the voyage across the ocean and they were rarely analyzed. Therefore, the sealing materials of this ship were analyzed by several analytical approaches. The sealing materials included two types, i.e., gap filler with jute fibers and surface coating without any oakum. The main components of both types of putty are calcite with minor Tung oil. The weight ratio of Ca(OH)2/Tung oil range from 4.3:1 to 7.9:1 for surface coating samples and the weight ratio of Ca(OH)2/organics is 3.1:1 for the gap filler sample. Additionally, we first find that the surface coating has a layered structure, where outer layers contain more Tung oil than inner layers. The innermost layer of the surface coating sample might be altered by organic acids from wood deterioration, causing its loose structure and grey color. The composite layers with different formula might be a result of balancing the costs and performances of the putty.

scholarly journals Chemical composition of germinating Tunisian almond (Prunus Amygdalus Mill.) seedlings oil

2021 ◽  
Vol 48 (2) ◽  
Author(s):  
Refka Dhouibi ◽  
◽  
Hanen Oueslati ◽  
Senda Bahri ◽  
Khaled Jabou ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Lipolytic Activity ◽  
Chemical Properties ◽  
Dry Mass ◽  
Chemical Components ◽  
Prunus Amygdalus ◽  
Almond Oil ◽  
Physico Chemical ◽  
Total Fatty Acids

Almonds (Prunus amygdalus) are a rich source of many essential nutrients. However, there is a lack of enough information on almond varieties' biochemical composition, especially at the germination stage. Therefore, this study was conducted to determine the chemical components of the germinating Tunisian almonds. The study included determining the content of oils, proteins, fatty acids, and triglycerides during germination. Results indicated that the oleaginous seeds are rich in oil (55 to 65% of the dry mass) and crude protein (21.825 mg/mL). The dominant polyunsaturated fatty acids are oleic and linoleic acids which represent 64.53% and 24.38%, respectively, while palmitic acid is the most dominant saturated fatty acid with 7.65% of the total fatty acids. Also, the primary molecular types of triglycerides detected by L.C. analysis are triolein (32.3%) and dioleolinolein (24.0%), followed by palmitodiolein (12.5%) and oleodilinolein (12.6%.). The physico-chemical properties study revealed that almond oil remains stable, thus preserving its quality and nutritional value, even during transition from dormancy to germination. On the other hand, we also detected the presence of a lipolytic activity which is maximum on the 3rd day of germination (4.66 mUI). Our results indicate that almond oil plays an important role in human nutrition due to the presence of unsaturated fatty acids, and it is more stable than other oils.

CHEMICAL COMPOSITION OF HYPHAL AND SCLEROTIAL WALLS OF SCLEROTIUM ROLFSII SACC.

1967 ◽  
Vol 13 (2) ◽  
pp. 137-141 ◽  
Author(s):  
I. Chet ◽  
Y. Henis ◽  
R. Mitchell
Keyword(s):  
Amino Acids ◽  
Chemical Composition ◽  
Acid Hydrolysis ◽  
Sclerotium Rolfsii ◽  
Ash Content ◽  
Chemical Degradation ◽  
Chemical Components

The chemical components of the sclerotial and hyphal walls of the fungus Sclerotium rolfsii Sacc. are compared. Sclerotial walls contain a melanin-like pigment which is absent from hyphal walls. They are also higher in non-hydro-lyzable residue, in lipids, and in ash content. In both walls, glucose, mannose, and glucosamine are found after acid hydrolysis. Acid hydrolysates of sclerotial and hyphal walls contain 10 and 13 amino acids, respectively, L-arginine, L-serine, and L-proline being absent from sclerotial walls. The possible role of some of these components in the resistance of the sclerotia to biological and chemical degradation is discussed.

Identifying the Country of Meilugudun and the Significant Value of Zhou Qufei’s Lingwai daida

2017 ◽  
Vol 21 (1) ◽  
pp. 1-43
Author(s):  
Victoria Almonte
Keyword(s):  
Fifteenth Century ◽  
Song Dynasty ◽  
Social Differences ◽  
Political Consequences ◽  
Southern Song ◽  
The North ◽  
Maritime Silk Road ◽  
Chinese Texts ◽  
The Relationship ◽  
The City

Abstract During the last century, considerable interest arose regarding Chinese knowledge of western territories, with a long list of works being published on the topic. Joseph Needham’s Science and Civilisation in China (1959) states that Arab thinking had clearly influenced the Chinese conception of geography over the centuries. Zhang Xinglang analyses the relationship between the Chinese empire and countries overseas, focusing on Islamic countries and particularly those in the north of Africa. Feng Chengjun’s western territories toponyms and Gudai nanhai diming huishi have provided two powerful and even fundamental tools for the research presented here. The first gathers together a large collection of toponyms from various literary works; these are written in western language with their relative transcription or translation in Chinese. The second, the Gudai nanhai diming huishi, is divided in two volumes analysing many Chinese toponyms and their use in several geographical works. Li Qingxin’s Haishang Sichou zhilu, focuses on the development of the Maritime Silk Road and its economic-political consequences for China’s empire. Gabriele Foccardi’s research focuses instead on the motives for Chinese travellers and their expeditions, highlighting the historical and social differences between the different dynasties. Friedrich Hirth and William Rockhill provide a crucial literary resource with their translation of Zhao Rukuo’s work, Zhufanzhi (1966), as does J.V.G. Mills with his annotated translation of Ma Huan’s Yingya shenglan, a journey work of the fifteenth century. Yang Wuquan’s research into Zhou Qufei’s work, published in 1999, identifies several toponyms used by Zhou and compares several foreign geographical works. Zhou Qufei and Zhao Rukuo were both imperial officials during the Southern Song dynasty. They spent many years in the border territories of China: Zhou Qufei in Qinzhou, Guangxi province, and Zhao Rukuo in Quanzhou, Fujian province. Their works mention several toponyms never used before in Chinese texts: ‘Meilugudun’, or ‘Meilugu’ (as written by Zhao Rukuo), is one of these. The identification of this toponym has not been determined until now. Therefore, the aim of this paper is to determine which kingdom was identified with the ‘Meilugudun’ toponym during the Song Dynasty. Two different questions are here discussed and resolved. First, can the land of Meilugudun be identified with the city of Merv in Turkmenistan? Second, do Zhou’s ‘Meilugudun’ and Zhao’s ‘Meilugu’ both stand for the same place? This paper can be divided into four sections. The first section focuses on Zhou Qufei, the second on Zhao Rukuo. The third analyses and compares previous scholars’ studies. The fourth proposes the new identification of the Meilugudun kingdom.

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