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[4] viXra:1906.0451 [pdf] submitted on 2019-06-23 11:47:08
Authors: Shaheda Parveen, Venkata Nadh Ratnakaram, Sireesha Malladi, K. Kiram Kumar
Comments: 11 Pages.
While trace amounts of fluorine are essential for life, its excessive intake
leads to a disease known as fluorosis. It is a predominant ailment in majority of the
countries inclusive of India. It is caused also by drinking fluoride containing water.
Retention of fluorine in bones and teeth occurs through F−–(OH−) exchange on their
inorganic component known as hydroxylapatite. Endeavour of the present study is to
design a column using activated alumina as an adsorbent for continuous defluoridation
ofwater for domestic purpose. As a part of it, operational defluoridation capacity
of aluminawas determined by variation of different factors (amount of alumina, time,
temperature, added salts). A family of four members was taken as a model. The initial
and final fluoride concentrations were taken as 2.0 and 0.7 ppm, respectively.
Dimension of the unit (adsorbent bed diameter and height) was determined.
Category: Chemistry
[3] viXra:1906.0450 [pdf] submitted on 2019-06-23 11:48:48
Authors: Venkata Nadh Ratnakaram, C. G. Prakasa Rao, Satya Sree
Comments: 13 Pages.
As the world oil reserves are draining day by day, new resources of carbon
and hydrogen must be investigated to supply our energy and industrial needs. An
extensive amount of biomass is accessible in many parts of the world and could be
utilized either directly or as crude material for the production of different fuels. The
motivation behind the present research is to find an appropriate strain for the fermentation
of watermelon waste to get ethanol. Saccharification and fermentation (SSF)
of watermelon waste were carried out simultaneously in the presence of A. niger and
S. cerevisiae (toddy origin and baker’s yeast). Toddy originated S. cerevisiae culture
is found to be more active than that of baker’s yeast. For the ethanol production, the
optimized conditions for different parameters like temperature, time, strain and pH
are finalized.
Category: Chemistry
[2] viXra:1906.0409 [pdf] submitted on 2019-06-20 11:57:48
Authors: Domenico Oricchio
Comments: 1 Page.
I hypothesize that organic synthesis is possible using a universal automatic machine
Category: Chemistry
[1] viXra:1906.0274 [pdf] submitted on 2019-06-16 02:13:47
Authors: Eeduri Ramya Devi, Reddymasu Sreenivasulu, Koya Prabhakara Rao, Ratnakaram Venkata Nadh, Malladi Sireesha
Comments: 7 Pages.
Cancer is a second leading cause of death after heart attack, in developing as well as undeveloped
countries. It is caused by unregulated growth and metastasis of the abnormal cancer cells.
Cancer can be cured by radiation, immunotherapy and chemotherapy, among them; chemotherapy is a
good treatment for cancer, in which chemotherapeutic drug is used. The anticancer activity of newly
compounds (13a-j) was carried out on four different types of human cancer cell lines like MCF-7
(breast), A549 (lung), Colo-205 (colon) and A2780 (ovarian) by the MTT method, and compared to
etoposide used as a positive control. Among them, compound 13g with electron-withdrawing (3,5-
dinitro) group, exhibited more promising activity in all cell lines (MCF-7 = 0.10±0.076 μM, A549 =
0.17±0.039 μM, Colo-205= 0.13±0.022 μM and A2780 = 0.87±0.027μM). This compound may act as
lead drug in cancer chemotherapy. In future, this compound can be examined for clinical studies.
Category: Chemistry
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