ChemInform Abstract: STUDIES ON THE CHEMICAL COMPONENTS OF THE RUTACEAE PLANTS PART 7, COMPONENTS OF THE ROOTS OF PONCIRUS TRIFOLIATA RAFINESQUE PONCITRIN, A NEW COUMARIN, STRUCTURE AND CHEMICAL DEGRADATION

1974 ◽  
Vol 5 (29) ◽  
pp. no-no
Author(s):  
T. TOMIMATSU ◽  
H. HASEGAWA ◽  
K. TORI
Keyword(s):  
Poncirus Trifoliata ◽  
Chemical Degradation ◽  
Chemical Components

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.

scholarly journals CFD Modeling of UV/H2O2 Process in Internal Airlift Circulating Photoreactor

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3237
Author(s):  
Minghan Luo ◽  
Fan Zeng ◽  
Taeseop Jeong ◽  
Gongde Wu ◽  
Qingqing Guan
Keyword(s):  
Experimental Data ◽  
Gas Flow ◽  
Cfd Simulation ◽  
Low Cost ◽  
Chemical Degradation ◽  
Cfd Modeling ◽  
Chemical Components ◽  
Flow Mode ◽  
Treatment Technology ◽  
Photocatalytic Reactor

UV chemical degradation is a low-cost and sustainable wastewater treatment technology that protects the environment. In this study, computational fluid dynamics (CFD), mass transfer, and photochemical kinetic models combined with the continuous flow mode of UV/H2O2 were applied for the photochemical reaction of internal airlift circulation photocatalytic reactor to improve the efficiency of the reaction. Results show that with the increase in gas flow rate, the turbulence intensity and internal circulation effect of liquid in the reactor can be enhanced under the condition of constant baffle spacing. The CFD simulation prediction results of the chemical components in the liquid flow show that H2O2 has a high correlation with the OH radical formation, which depends on the intensity of UV. Thus, the degradation rate of methylene blue (MB) has a high correlation with UV intensity. The degradation efficiency of MB is improved with the increase in gas velocity by comparing the experimental data with the numerical simulation data. The experimental data are generally lower than the numerical prediction data, and although a certain difference range is observed, the overall prediction results are better.

scholarly journals SALT MARSH RECOVERY FROM A CRUDE OIL SPILL: VEGETATION, OIL WEATHERING, AND RESPONSE

1993 ◽  
Vol 1993 (1) ◽  
pp. 307-311 ◽  
Author(s):  
Rebecca Z. Hoff ◽  
Gary Shigenaka ◽  
Charles B. Henry
Keyword(s):  
Crude Oil ◽  
Plant Biomass ◽  
Puget Sound ◽  
Monitoring Program ◽  
Growing Season ◽  
Chemical Degradation ◽  
Chemical Components ◽  
Percent Cover ◽  
Sediment Samples ◽  
Cleanup Workers

ABSTRACT Responding to oil spills in marshes is always problematic, since inappropriate response activities can easily add to the overall damage to the marsh. When a spill of Prudhoe Bay crude oil covered a fringing Salicornia virginica marsh in Fidalgo Bay, Washington (northern Puget Sound) in February 1991, response personnel used several low-impact techniques to remove oil from the marsh, and minimized access by cleanup workers. Following the response, we established a monitoring program to track marsh recovery, and to document the effectiveness of the response techniques used and their impacts on the marsh. Through monthly sampling over a 16-month period, we monitored vegetative growth and tracked the chemical degradation of remaining oil. Sampling was conducted along transects located in four areas affected in different ways by the spill, including an oiled, trampled section; an oiled, vacuumed section; and an oiled, washed, and vacuumed section. In addition, a control transect was established in an unoiled adjacent marsh. The study included both biological and chemical components. Biological measurements included percent cover of live vegetation (sampled monthly) and below-ground plant biomass (sampled at the beginning of each growing season in April 1991 and April 1992). Sediment samples included surface sediment (monthly) and core samples collected at the beginning and end of the growing seasons. Sediment samples were analyzed using gas chromatography/mass spectroscopy, and indicator compounds were tracked to determine rates of oil degradation. Results from 16 months of post-spill monitoring show that foot trampling was most detrimental to marsh plants, while washing with vacuuming removed the most oil and minimized adverse impacts to vegetation. Dense clay substrate helped prevent oil from penetrating the sediment, thus minimizing acute toxic effects from oil exposure to marsh plant rootstock. By the second growing season post-spill, Salicornia and other marsh plants were growing in all areas except one heavily oiled patch. The monitoring program will be continued to determine if any delayed impacts occur in the marsh.

Microscopic versus process parameters in heavy-oil upgrading

1992 ◽  
Vol 50 (1) ◽  
pp. 366-367
Author(s):  
V.A. Munoz ◽  
R.J. Mikula ◽  
C. Payette ◽  
W.W. Lam
Keyword(s):  
Molecular Weight ◽  
Liquid Fuels ◽  
Chemical Components ◽  
Heavy Oils ◽  
Synthetic Fuels ◽  
High Hydrogen ◽  
Optical Texture ◽  
Polar Groups ◽  
Anisotropic Character ◽  
Planar Molecules

The transformation of high molecular weight components present in heavy oils into useable liquid fuels requires their decomposition by means of a variety of processes. The low molecular weight species produced recombine under controlled conditions to generate synthetic fuels. However, an important fraction undergo further recombination into higher molecular weight components, leading to the formation of coke. The optical texture of the coke can be related to its originating components. Those with high sulfur and oxygen content tend to produce cokes with small optical texture or fine mosaic, whereas compounds with relatively high hydrogen content are likely to produce large optical texture or domains. In addition, the structure of the parent chemical components, planar or nonplanar, determines the isotropic or anisotropic character of the coke. Planar molecules have a tendency to align in an approximately parallel arrangement to initiate the formation of the nematic mesophase leading to the formation of anisotropic coke. Nonplanar highly alkylated compounds and/or those rich in polar groups form isotropic coke. The aliphatic branches produce steric hindrance to alignment, whereas the polar groups participate in cross-linking reactions.

Change in Chemical Components and Antioxidant Activity of Adzuki Beans during Germination

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
J Ko ◽  
K Woo ◽  
S Song ◽  
J Lee ◽  
M Seo ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Components

TOXIC PROPERTIES AND INTAKE SYMPTOMS OF SOME WILD PLANTS IN RELATION TO REPORTED FROM THE FOREST OF NORTH WEST SATPUDA REGION OF MAHARASTRA, INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
SANJAY A. KHAIRNAR
Keyword(s):  
Secondary Phase ◽  
Wild Plants ◽  
Chemical Components ◽  
World Population ◽  
Poisonous Plants ◽  
North West ◽  
Toxic Plants ◽  
Datura Metel ◽  
Croton Tiglium ◽  
Modern Era

In modern era about 80% of the world population depends on herbal alternative system of medicine. Seventy thousand plants are used in medicine and about 2000 plants are used in Indian Ayurveda. The activities of the curative plants are evaluated by their chemical components. Few of them are important as a medicine but also posses poisonous or toxic properties. The toxicity is produced in them due to the synthesis of toxic chemical compounds may be in primary or secondary phase of their life. Most of the users of such medicinal plants in crude form are tribal and peoples living in the forests and their domestic stock . Most of the time these peoples may not aware about the toxicity of such plants used by them and probably get affected sometimes even leads to death. In the study area during the field survey of poisonous plants, information are gathered from the traditional practicing persons, cow boy and from shepherds. About 20 plant species belonging to 17 families are reported as a medicinal as well as toxic. From the available literature, nature of toxic compound and symptoms of their intake on human being are recorded. In the study area the plants like, Abrus precatorious commonly known as a Gunj or Gunjpala, Jatropha curcas , (Biodiesel plant), Croton tiglium (Jamalgota), Citrullus colocynthis (Kadu Indrawan, Girardinia diversifolia (Agya), Mucuna purriens (Khajkuairi), Euphorbia tirucali (Sher), E. ligularia (Sabarkand), Datura metel ( Kala Dhotara), Datura inoxia (Pandhara Dhotara) and Asparagus racemo-sus (Shatavari) etc . are some of the toxic plants used as a medicine and harmful also.

Effect of Breed and Some Non - Genetic Factors on Milk Production and Some Proportions of Its Chemical Components in Two Breeds of Local Sheep

2020 ◽  
Vol 10 (1) ◽  
pp. 227-231
Author(s):  
Rahman Hussein AL-Qasimi ◽  
Shatha Mohammed Abbas ◽  
Allawi L.D. AL-Khauzai
Keyword(s):  
Milk Production ◽  
Genetic Factors ◽  
Chemical Components ◽  
Lactation Period ◽  
Production Traits ◽  
Milk Production Traits ◽  
Fat Percentage ◽  
Awassi Sheep ◽  
Total Milk ◽  
Milk Components

The study was carried out on 19 ewes of local Awassi sheep and 12ewes local Arabi sheep in the Al-kafeel sheep station Karbala, to determine the effect of breed and some non-genetic factors such as (sex of the lamb, type of birth, age and weight of ewes at birth) on daily and total milk production and lactation period and some of milk components (fat, protein and lactose). The results showed that a significant effect (P <0.05) of the breed on milk production traits where Awassi sheep recorded the highest mean (0.91 kg , 101.63 kg , 104.86 day) compared to the Arabi sheep she was means (0.77 kg , 88.15 kg , 99.15 day) respectively. As well as in proportions of milk components with mean( 5.1 , 4.90 , 5.51) % respectively compared to the Arabi sheep (4.70 . 4.20 . 4.89) ewes with male lambs also exceeded superior ewes with female lambs in daily and total milk production and the lactation period the sex of the lamb did not affect the proportions of milk components the weight of the ewes had a significant effect (P <0.05) in milk production attributes with superior weight of ewes on lower ewes and did not affect the proportions of milk ingredients except for lactose. The type of birth and the age of the ewes did not have a significant effect in all the studied traits except for the superiority (P<0.05) of young ewes on age ewes in the fat percentage of milk.

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