Indole alkaloids from Ervatamia orientalis. I. Isolation of alkaloids and structural identification of two dimers

1975 ◽  
Vol 28 (8) ◽  
pp. 1813 ◽  
Author(s):  
JR Knox ◽  
J Slobbe
Keyword(s):  
Indole Alkaloids ◽  
Structural Identification ◽  
The Novel ◽  
Chemical Methods ◽  
Ethanol Extracts ◽  
Physical And Chemical

Ethanol extracts of Ervatamia orientalis have yielded the following known alkaloids: ibogaine, iboxygaine, voacristine, vobasine, dregamine, tabernaemontanine, apparicine, voacamine and 16- demethoxycarbonylvoacamine. In addition, two new dimeric alkaloids of the voacamine group and the novel 2-acylindoles ervatamine, 20- epiervatamine and 19-dehydroervatamine have been isolated from the extracts. The two new dimeric compounds have been identified by physical and chemical methods as 16-demethoxycarbonyldihydrovoacamine and 16-demethoxycarbonyl-20?-epi-dihydrovoacamine.

scholarly journals Plant-Mediated Green Synthesis of Iron Nanoparticles

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mihir Herlekar ◽  
Siddhivinayak Barve ◽  
Rakesh Kumar
Keyword(s):  
Magnetic Nanoparticles ◽  
Inorganic Nanoparticles ◽  
Noble Metal Nanoparticles ◽  
Biological Synthesis ◽  
The Novel ◽  
Research Focus ◽  
Plant Resources ◽  
Chemical Methods ◽  
Synthesis Of Nanoparticles ◽  
Physical And Chemical

In the recent years, nanotechnology has emerged as a state-of-the-art and cutting edge technology with multifarious applications in a wide array of fields. It is a very broad area comprising of nanomaterials, nanotools, and nanodevices. Amongst nanomaterials, majority of the research has mainly focused on nanoparticles as they can be easily prepared and manipulated. Physical and chemical methods are conventionally used for the synthesis of nanoparticles; however, due to several limitations of these methods, research focus has recently shifted towards the development of clean and eco-friendly synthesis protocols. Magnetic nanoparticles constitute an important class of inorganic nanoparticles, which find applications in different areas by virtue of their several unique properties. Nevertheless, in comparison with biological synthesis protocols for noble metal nanoparticles, limited study has been carried out with respect to biological synthesis of magnetic nanoparticles. This review focuses on various studies outlining the novel routes for biosynthesis of these nanoparticles by plant resources along with outlining the future scope of work in this area.

Indole alkaloids from Ervatamia orientalis. II. The constitution of the ervatamine group

1975 ◽  
Vol 28 (8) ◽  
pp. 1825 ◽  
Author(s):  
JR Knox ◽  
J Slobbe
Keyword(s):  
Mass Spectra ◽  
Indole Alkaloids ◽  
The Other ◽  
The Novel ◽  
Physical And Chemical

This paper describes the combination of physical and chemical degradative methods that has led to the elucidation of the constitution of the novel 2-acylindole alkaloids, ervatamine (5), 20-epi-ervatamine (6) and 19-dehydroervatamine (7). The alkaloids show differences in the N.M.R. spectra and in the rates of methylation which indicate that ervatamine has a different conformation from the other two alkaloids; the conformations which are suggested for the alkaloids (35)-(37) have alternative chair conformations of the piperidine rings. Correlations in the mass spectra of the natural alkaloids and of several simple derivatives are discussed.

Modification of Collagen for Biomedical Applications: A Review of Physical and Chemical Methods

2016 ◽  
Vol 20 (17) ◽  
pp. 1797-1812 ◽  
Author(s):  
Xiaoyue Yu ◽  
Cuie Tang ◽  
Shanbai Xiong ◽  
Qijuan Yuan ◽  
Zhipeng Gu ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Chemical Methods ◽  
Physical And Chemical

Biomedical Applications and Patents on Metallic Nanoparticles

2020 ◽  
Vol 10 ◽  
Author(s):  
Geetanjali Singh ◽  
Pramod Kumar Sharma ◽  
Rishabha Malviya
Keyword(s):  
Metallic Nanoparticles ◽  
Biomedical Applications ◽  
Size Range ◽  
Biomedical Application ◽  
Chemical Reduction ◽  
Chemical Methods ◽  
Future Challenges ◽  
Biological Methods ◽  
Cancer Diagnosis And Therapy ◽  
Physical And Chemical

Aim/Objective: The author writes the manuscript by reviewing the literatures related to the biomedical application of metallic nanoparticles. The term metal nanoparticles are used to describe the nanosized metals with the dimension within the size range of 1-100 nm. Methods: The preparation of metallic nanoparticles and their application is an influential area for research. Among various physical and chemical methods (viz. chemical reduction, thermal decomposition, etc.) for synthesizing silver nanoparticles, biological methods have been suggested as possible eco-friendly alternatives. The synthesis of metallic nanoparticles is having many problems inclusive of solvent toxicity, the formation of hazardous byproducts and consumption of energy. So it is important to design eco-friendly benign procedures for the synthesis of metallic nanoparticles. Results: From the literature survey, we concluded that metallic nanoparticles have applications in the treatment of different diseases. Metallic nanoparticles are having a great advantage in the detection of cancer, diagnosis, and therapy. And it can also have properties such as antifungal, antibacterial, anti-inflammatory, antiviral and anti-angiogenic. Conclusion: In this review, recent upcoming advancement of biomedical application of nanotechnology and their future challenges has been discussed.

scholarly journals Decreasing Oxalate Levels in Kimpul Tubers (Xanthosoma sagittifolium) by Physical and Chemical Methods

2021 ◽  
Vol 667 (1) ◽  
pp. 012015
Author(s):  
I Sulaiman ◽  
C Annisa ◽  
Y M Lubis ◽  
Z F Rozali ◽  
S Noviasari ◽  
...  
Keyword(s):  
Chemical Methods ◽  
Xanthosoma Sagittifolium ◽  
Physical And Chemical

ChemInform Abstract: The Novel Approach to Indole Alkaloids by Using Pd(II)-Catalyzed Cyclization.

ChemInform ◽  
2015 ◽  
Vol 46 (17) ◽  
pp. no-no
Author(s):  
Hajime Yokoyama ◽  
Takayoshi Kubo ◽  
Yosuke Matsumura ◽  
Junichi Hosokawa ◽  
Masahiro Miyazawa ◽  
...  
Keyword(s):  
Indole Alkaloids ◽  
The Novel ◽  
Novel Approach

COMPARAISON DE DIVERSES METHODES DE CASTRATION ET DE STERILISATION DES AGNEAUX: I. INFLUENCE DE CES METHODES SUR LA CROISSANCE, L’EFFICIENCE ALIMENTAIRE, LE RENDEMENT A L’AHATTAGE ET LA RENTABILITE

1971 ◽  
Vol 51 (3) ◽  
pp. 579-589 ◽  
Author(s):  
J. M. BAILLARGEON ◽  
J. P. LEMAY ◽  
W. B. HOLTMANN ◽  
L. A. CHARETTE
Keyword(s):  
Feed Efficiency ◽  
Intramuscular Injection ◽  
Cadmium Chloride ◽  
Complete Removal ◽  
Chemical Methods ◽  
Treatment Groups ◽  
Dressing Percentage ◽  
Breeding Groups ◽  
Physical And Chemical ◽  
Daily Gain

An experiment was conducted to compare various physical and chemical methods of castration of lambs at 15 and 60 days of age. Their effects on body growth, feed efficiency, dressing percentage and profitability were studied. At birth 100 lambs were divided among the 16 different treatments according to sex and the following breeding groups: Suffolk, North Country Cheviot, two-breed cross and three-breed cross. The different methods of castration were: complete removal of the testicles, Burdizzo, elastrator and partial castration. The sterilization methods consisted of intramuscular, intratesticular and intraveinous injection of cadmium chloride. All lambs were weaned at 30 days of age and placed in individual pens. They were subjected to similar environmental conditions and shipped to slaughter at approximately 45 kg body weight. Significant differences were observed among breeds, sexes and the various castration methods for daily gain, feed efficiency, days required to reach market and profitability. Age at castration did not have any important effect ort the variables measured. Superior gains, feed efficiency and profitability were observed for the partially castrated group, for the lambs that received an intramuscular injection of cadmium chloride and for the non-castrated males. All treatment groups involving males were superior to the females for the characters studied except for dressing percentage.

SUBSTANTIATION OF THE TECHNOLOGICAL SCHEME FOR PRODUCING LIQUID SUGAR FROM SEMI-PRODUCTS OF BEET SUGAR PRODUCTION

2019 ◽  
Author(s):  
Р.С. Решетова ◽  
О.Ю. Бганцева
Keyword(s):  
Food Production ◽  
Technological Scheme ◽  
Preliminary Treatment ◽  
Sugar Solution ◽  
Sugar Production ◽  
Chemical Methods ◽  
Storage Duration ◽  
Number Of Microorganisms ◽  
Permissible Levels ◽  
Physical And Chemical

Разработана технологическая схема получения жидкого сахара из полупродуктов свеклосахарного производства, которая предусматривает получение исходного (концентрированного) сахарного раствора из сиропа после выпарки, некондиционного сахара и желтого сахара последнего продукта с содержанием сухих веществ (СВ) от 68 до 72. Изучено изменение количества микроорганизмов в жидком сахаре в течение 30 сут хранения в закрытых сосудах при температуре окружающей среды без предварительной обработки физическим и химическим способами с целью использования сиропа при производстве пищевых продуктов. Установлено, что в растворе с содержанием СВ 68 72 количество микроорганизмов увеличилось: бактерий с 15 до 60 КОЕ/г, дрожжей и плесневых грибов с 10 до 34 КОЕ/г, что не превышает допустимых уровней СанПиН 2.3.2.1078 01 и ГОСТ Р 53035 2008. Определена длительность хранения жидкого сахара для использования в пищевых производствах не более 15 сут. The technological scheme of obtaining liquid sugar from semiproducts of sugar beet production, which provides for obtaining the initial (concentrated) sugar solution from the syrup after evaporation, substandard sugar and yellow sugar of the last product with a content of dry matters from 68 to 72, has been developed. The change in the number of microorganisms in liquid sugar was studied during 30 days of storage in closed vessels at ambient temperature without preliminary treatment by physical and chemical methods with the aim of using syrup in food production. It was found that in the solution with the content of dry matters 68 72 the number of microorganisms increased: bacteria from 15 to 60 CFU/g, yeast and fungi from 10 to 34 CFU/g, which does not exceed the permissible levels of SanPiN 2.3.2.1078 01 and GOST R 53035 2008. The storage duration of liquid sugar for use in food production was determined no more than 15 days.

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