The Problem of Making Uniform Crude Rubber and Its Standardization

1939 ◽  
Vol 12 (1) ◽  
pp. 1-11
Author(s):  
M. Bocquet
Keyword(s):  
Chemical Properties ◽  
Open Market ◽  
Physical And Chemical Properties ◽  
Intrinsic Quality ◽  
Physical And Chemical ◽  
Commercial Sheet ◽  
And Chemical Properties

Abstract The problem of attaining uniformity in crude rubber and of standardizing its properties has become of the greatest concern to planters, and at the present time two facts are evident: 1. In evaluating the product which the planter has furnished him, the rubber broker has based his judgment solely on the superficial appearance of the rubber, which frequently has nothing in common with its intrinsic quality. 2. The manufacturer has found frequent cause of complaint in the variability of different lots of rubber which he has purchased and which it has been impossible for him to distinguish by superficial examination. for these reasons the planters, in agreement with the manufacturers, should welcome the classification of crude rubber into a small number of types based on the physical and chemical properties of the product. However, considering the variability of rubber at the present time, crude rubber must obviously be uniform before any attempt is made to draw up specifications. As is shown by M. Bocquet in the following discussion, the production of uniform rubber should not require any great efforts on the part of the planters, and if the planters prefer not to change their methods at the present time, it is because their methods are adjusted to the output of commercial sheet rubber, the only kind salable on the open market.

scholarly journals A potential antiviral and food-derived healthy ingredient: Resveratrol

2021 ◽  
Vol 7 (1) ◽  
pp. 54-63
Author(s):  
Ayla Arslaner ◽  
Zehra Türkoğlu
Keyword(s):  
Carbon Number ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Food Ingredient ◽  
Beneficial Effects ◽  
Antiviral Effects ◽  
Natural Polyphenol ◽  
Physical And Chemical ◽  
And Chemical Properties

Polyphenols are the secondary metabolites of plants and has an important role in human nutrition as the leading antioxidants. According to the carbon number-based classification of polyphenols, resveratrol is a natural polyphenol in the stilbene group with antioxidant and anticarcinogenic effects. Its beneficial effects on cardiovascular diseases have also been reported. It was first identified in 1940 and has recently gained importance especially in medicine and pharmacy. Researchers have carried out various studies on resveratrol and its time-honored use in traditional eastern medicine has been reported. Resveratrol is a food ingredient that has the potential to be used in the treatment of various diseases, but also has antiviral effects. The study focuses on resveratrol’s physical and chemical properties, effects on health, antiviral effects and use in foods as a functional component.

scholarly journals Improve the physical and chemical properties of camel's hair fiber in Afif province: تحسين الخصائص الفيزيائية والكيميائية لشعيرات وبر الإبل بمحافظة عفيف

2019 ◽  
Vol 3 (3) ◽  
Author(s):  
Leila Mahmoud Mokhtar, Enas Ibrahim Moussa
Keyword(s):  
Acetic Acid ◽  
Protein Content ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Textile Materials ◽  
Hair Fiber ◽  
German System ◽  
Physical And Chemical ◽  
And Chemical Properties

    The study aimed to draw attention to the camel's hair available in Afif province and to give information about their physical and chemical properties, and improve their properties. The researchers' collected 50 samples of camel's hair, analyze, and then add improvement material. The study concluded that the Afif Province camel's hair have properties that can converted into textile materials. The softness are from 24.5 to 29 μ, (B and C1) according to the classification of the German system GER, and between 58 S And 60 S according to the classification of (USA, AUS, GRB). The thickness between 5.3 - 12 cn/ tex. The length between (3.8 - 25.5 cm), and the colors of camels hair (Brown, light brown, light creamy, dark creamy). The chemical properties were similar to the global chemical properties of wool, Absorption of moisture from 0.10% to 0.26%, the protein content from 52% to 95%, and its capable temperature to 140 °C without occur softness or fusion, and after 140 degree centigrade the decomposition occurs. Characteristics of the camel's hair can improve by adding some chemicals, such as acetic acid to improve the softness without affecting the durability, or by mixed with other fiber.    

A soil toposequence on bunya phyllite in Brisbane

Soil Research ◽  
1981 ◽  
Vol 19 (1) ◽  
pp. 1
Author(s):  
AJ Koppi
Keyword(s):  
Chemical Properties ◽  
Parent Material ◽  
Physical And Chemical Properties ◽  
Genetic Unit ◽  
Dioctahedral Mica ◽  
Physical And Chemical ◽  
In Situ Weathering ◽  
And Chemical Properties

A common toposequence on Bunya Phyllite in south-east Queensland was studied in detail at a representative site. Four sample profiles on the slope are described, and some physical and chemical properties are given. The clay minerals, derived from the weathering of the quartz-sericite-chlorite phyllite, comprise dioctahedral mica, dioctahedral vermiculite, an interstratification of these minerals, and kaolin. Properties are related to the slope; and the clay-rich horizon of the middle and lower slopes is considered to be formed mostly by in situ weathering. The classification of the genetic unit given by the slope and parent material is discussed.

C13 NMR Spectrum Analysis of Perfluoro Polyethers (PFPE) of Fluorocarbon-Based Magnetic Fluid’s Base Liquid

2011 ◽  
Vol 142 ◽  
pp. 120-124
Author(s):  
Hong Chao Cui ◽  
De Cai Li ◽  
Peng Liu
Keyword(s):  
Spectrum Analysis ◽  
Functional Group ◽  
Chemical Properties ◽  
Magnetic Fluids ◽  
Physical And Chemical Properties ◽  
Nmr Spectrum ◽  
Physical And Chemical ◽  
Base Liquid ◽  
And Chemical Properties

The physical and chemical properties of nanofluorocarbon-based magnetic fluids are deeply affected by the introduction of fluorinated base liquid. In this paper, firstly we introduce the concept, composition and classification of nanofluorocarbon-based magnetic fluids, then we discuss the properties, preparation and structure of perfluoro polyethers (PFPE); afterwards we analyze the NMR spectrum to infer the structure contained in the polymer in detail and systematically, further verify the functional group of PFPE.

scholarly journals Characterization and classification of soils of Northern hills Zone of Chhattisgarh, Madhya Pradesh

2021 ◽  
Vol 17 (AAEBSSD) ◽  
pp. 147-149
Author(s):  
P.N. Tripathi ◽  
U.S. Mishra ◽  
Pawan Sirothia ◽  
R.P. Singh
Keyword(s):  
Cation Exchange Capacity ◽  
Chemical Properties ◽  
Clay Content ◽  
Exchange Capacity ◽  
Organic Carbon Content ◽  
Physical And Chemical Properties ◽  
Clay Loam ◽  
Physical And Chemical ◽  
And Chemical Properties

Three representative soil pedonsof northern hills of Chhattisgarh, M.P were morphologically studied, characterized and classified. The soils are very deep, colour ranges from brown (10YR5/3) to dark brown (10YR3/3) and very dark greyish brown (10YR3/2) in different horizons. Fe and calcretes are observed in sub surface horizons. The texture in surface soils varied from clay loam to clay while in pedon 2, the texture was observed sandy clay loam throughout the profile. The soils are calcareous and pH ranged from 7.0 to 7.5. The organic carbon content in these soils were (4.4 g kg-1), low to medium (6.1 g kg-1) in surface and decreased with depth. Cation exchange capacity (CEC) were found high in horizons where clay content was more. Based on morphological, physical and chemical properties P1 and P3 were classified as VerticHaplustalfs and pedon (P2) was placed under Typic Haplustepts.

scholarly journals Sivas-Kurugöl Su Kalite Parametrelerinin Belirlenmesi

2013 ◽  
Vol 1 (1) ◽  
pp. 37 ◽  
Author(s):  
Ekrem Mutlu ◽  
Tuğba Demir ◽  
Banu Kutlu ◽  
Telat Yanık
Keyword(s):  
Water Quality ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Pollution Levels ◽  
Water Classification ◽  
And Control ◽  
Physical And Chemical ◽  
The Town ◽  
And Chemical Properties

Kurugöl Lake; Sivas province Hafik county Kurugöl village located within the boundaries of Sivas province, 54 km, Hafik the town 24 miles away, an area of 8.9 ha altitude of 1362 m, an average depth of 3.4 - 4 m with gypsum plateau on the bottom of the boiling water along with rainfall and snowmelt with the lake is fed naturally. Kurugöl (Hafik - Sivas) waters of Lake of the physical and chemical properties during the year changes occurring determining water quality characteristics to reveal the pollution levels are determined, living life in terms of the availability of the detection, water pollution and control regulations by the lake water classification and fishing activities, compliance with were identified. The inland lake in Kurugöl (SKKY) according to the classification of water resources in accordance with the parameters measured I-III water quality varies from class.

scholarly journals Study of Morphological, Physical and Chemical Characteristics of Salt Affected Soils Using Remote Sensing Technologies at Basrah Province

2019 ◽  
Vol 32 ◽  
pp. 105-125
Author(s):  
Saadia M. Saleh ◽  
Salah M. Sultan ◽  
Ali H. Dheyab
Keyword(s):  
Remote Sensing ◽  
River Sediments ◽  
Chemical Properties ◽  
Morphological Description ◽  
Physical And Chemical Properties ◽  
Light Yellow ◽  
Salt Affected Soils ◽  
Physical And Chemical ◽  
And Chemical Properties

This study was carried out to determine some morphological, physical and chemical properties of sedimentary salt affected soils in Basrah region east of Shatt al-Arab, and from the madina  north to Abi Al-Khaseeb in the south of an area of 2819.06km2. Soil mapping units were separated using ERDAS software calculated from B4, B3, B2 and GIS spectral belts. The results of the morphological description of all the pedons showed that they represent the state of the newly formed undeveloped soils mainly composed of river sediments with the absence of diagnostic subsurface horizons. According to the prevalence of the prevailing wavelength 7.5R at drought was more than 60% of total horizons with almost equal proportions of Wavelengths 7.5YR, 5YR and 10R. Where the dominance between the wavelengths 2.5Y, 10R, 5YR and the colours ranged from Light yellow to reddish-brown heavy. Since the salinity of the soil is very important for the purposes of classification of soil and the preparation of maps and reclamation of these soils, this study aimed to study the characteristics of soils affected by salinity has separated into maps units using remote sensing technologies and geographic information systems.

The Study of the Classification System for Travel Rubbish

2011 ◽  
Vol 356-360 ◽  
pp. 722-725
Author(s):  
Chi Zhang
Keyword(s):  
Classification System ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Travel Experience ◽  
Grade Division ◽  
Treatment And Disposal ◽  
Definition Of ◽  
Physical And Chemical ◽  
And Chemical Properties

Improper waste disposal will affect the travel experience of tourists , endanger human health. This paper demonstrats the definition of travel rubbish,the system of source classification, the classification system of physical and chemical properties, the system classification of collection and transfer system, treatment and disposal methods, the grade division of disposal scale and so on ,which has a good guidance to the management of travel rubbish.

scholarly journals Classification of the types and forms of loess pseudokarst

2019 ◽  
Vol 135 ◽  
pp. 01041
Author(s):  
Andrew Lavrusevich
Keyword(s):  
Crop Rotation ◽  
Chemical Properties ◽  
Material Damage ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Loess pseudokarst in recent decades has been developing very rapidly and causes significant material damage. Every year, as a result of the development of loess pseudokarst, tens of thousands of hectares of valuable irrigated land are left out of the crop rotation. This is a very rapidly developing process (months, days, hours). Classification of types of loess pseudokarst depending on the conditions of its development is given. An augmented classification of pseudokarst relief forms based on the physical and chemical properties of the loess is also presented. A brief description of the types and forms of loess pseudokarst poorly illuminated in the literature is given. The nature of the interaction of some natural and technogenic processes with loess pseudokarst is considered.

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