B.R. Rajeswara Rao

10 Questions 466 Answers 0 Followers

Questions related from B.R. Rajeswara Rao

Did anyone analyse the essential oil components present in the vapors escaping from Clevenger hydro-distillation condenser vent?

During hydro-distillation of aromatic plant biomass employing Clevenger trap, some vapors tend to escape from the condenser tube in spite of keeping the condenser as cool as possible with water...

24 June 2015 4,069 17 View

What are the effects of distillation water pH on the yield/recovery and chemical composition of an essential oil?

In the laboratory essential oils are isolated from aromatic plants employing Clevenger trap. In the field, farmers and distillers use steam distillation or hydro-cum-steam distillation for...

04 June 2015 6,880 14 View

Is anyone working on new techniques of distilling aromatic plants to produce essential oils?

Hydro, steam and hydro-cum-steam distillations are widely employed for distilling aromatic plants and produce essential oils from them. Though the technology is simple, plant biomass is burnt to...

20 March 2015 7,318 36 View

Can someone list out the methods of extraction (crude extract), compounds isolation, purification, identification and structural elucidation?

In Plant chemistry, several methods are employed for extraction of crude extract from plant biomass/tissue, concentration of crude extract to contain certain percentage of class or classes of...

10 March 2015 8,639 10 View

What is the maximum number of compounds an essential oil can contain?

I have recorded more than 200 compounds in lemongrass (Cymbopogon flexuosus/citratus) essential oil, more than 220 compounds in rose-scented geranium (Pelargonium graveolens/species) essential oil...

08 March 2015 3,092 15 View

Is cultivation of medicinal and aromatic plants in forests desirable or cultivation by farmers?

Collection of Wild medicinal and aromatic plants is rampant resulting in drastic depletion of these resources. Cultivation is a sustainable and economical option to conserve and protect the wild...

19 February 2015 5,352 21 View

Are there any non-destructive methods to isolate or separate volatile or non-volatile secondary metabolites from plant sources?

Destructive sampling to isolate volatile and non-volatile secondary metabolites are largely practiced. With the advances in technology, is it possible to quantify the secondary metabolites in a...

18 February 2015 5,953 15 View

Which do you recommend fresh or semi-dry or dry biomass/tissue for an aqueous/solvent extract or for extracting/isolating/separating phytochemicals?

Is it necessary to dry the plant material to prepare an extract or extract/isolate/separate active substances (class of compounds or pure phytochemicals) from plant sources?

12 February 2015 1,694 18 View

What is the difference between extraction and isolation of essential oil or active substances from aromatic and medicinal plants?

Researchers have used these terms interchangeably while describing procedures of extraction or isolation of essential oils from aromatic plants and extracts of medicinal plants. Which of the two...

11 February 2015 3,093 23 View

Which drying methods are practiced to dry plant biomass of spices, agricultural, horticultural, medicinal and aromatic plants?

Traditionally agricultural/horticultural crops, spices, medicinal and aromatic plants and other plant products are dried in shade or Sun. Subsequently hot-air oven drying, solar drier drying,...

11 February 2015 2,778 13 View