Recent development of chemical components in propolis

2009 ◽  
Vol 4 (4) ◽  
pp. 385-391 ◽  
Author(s):  
Yuanjun Xu ◽  
Liping Luo ◽  
Bin Chen ◽  
Yuxin Fu
Keyword(s):  
Chemical Components

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.

Uşak İli’nden Toplanan Taxus Baccata (L) Türünün Metanol Ekstresinin Yaprak, Dal ve Meyvesinde Biyolojik Aktivitenin Belirlenmesi

2019 ◽  
Vol 7 (10) ◽  
pp. 1533
Author(s):  
Yasemin Karafakıoglu
Keyword(s):  
Antioxidant Activity ◽  
Methanol Extract ◽  
Phenolic Content ◽  
Maximum Amount ◽  
Chemical Components ◽  
Taxus Baccata ◽  
Dpph Radical ◽  
Flavonoid Content ◽  
Future Studies ◽  
Different Parts

Taxus species in different parts of the world prevent the formation of hepatoprotective, anticoagulant, antiulcerogenic, anti-coagulant, antifungal and tumour cells. In this study, biological activity studies were performed on the leaves, branches and fruits of the methanol extract of Taxus baccata L. species collected from Sivaslı district of Uşak province. The methanol extract of the T.baccata species, the total amount of phenolic content of the sample was found to be 14.76 mg GAEQ/1g dry sample in the highest leaves. In T.baccata methanol extract, the maximum amount of flavonoid content was 0.468±mg QE/g dry sample. Antioxidant activity value as DPPH radical; % inhibition value was found as 93.21%. Based on the results; It can be concluded that the leaves of T.baccata have higher antioxidant activity than fruits and branches. Future studies need to explore the chemical components contained in the T.baccata species to determine and investigate in further detail.

HPLC analysis and activity to determine the effect of drying and extraction on Ficus benghalensis leaves

2020 ◽  
Vol 9 (1) ◽  
pp. 6-10
Author(s):  
Nithyakalyani K
Keyword(s):  
Extraction Method ◽  
Chemical Constituents ◽  
Extraction Procedure ◽  
Chemical Constituent ◽  
Chemical Components ◽  
Drying Method ◽  
Ultrasound Assisted Extraction ◽  
Critical Stage ◽  
Ficus Benghalensis ◽  
Assisted Extraction

Ficus benghalensis is one of those taboo plants in India, which was claimed to be possessed and have weird effects on human health. Apart from this ficus species has a great variety of chemical constituents and an abundant amount of antioxidants. Drying is the most critical stage of improving the activity or preventing the loss of chemical components from a drug. There is another stage of ensuring high chemical constituent content in the plant and that is the extraction procedure. So the point of focus in the current research is to find the effect of extraction method and drying on the anti-inflammatory potential of the plant. The result of the extraction method and drying method of the plant was investigated and found that the ultrasound-assisted extraction of the shade dried leaves was found to give the highest yield of flavonoids and activity.

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