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New York Science Journal
(N Y Sci J)
ISSN 1554-0200 (print); ISSN 2375-723X (online),
doi prefix: 10.7537, Monthly
Volume 19 -
Number 10 (Cumulated No. 212); October 25, 2026
Cover (pdf),
Cover,
Introduction,
Contents,
Call for
Papers
The following manuscripts are presented as online first for peer-review, starting from October 1, 2026.
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CONTENTS
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Authors /Abstracts
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1
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Comparative XRD
analysis of
PVA/TiO2,
PVA/ZrO2
and PVA/TiO2/ZrO2
Composites
1 Dr
Jyotsna Chauhan,2akansha mehto, 3Shaswat
Chauhan
1Professor
in RGPV,2Research scholar ,3 BITS Pilani
GOA
ABSTRACT: The
present study investigated the doping effects of different
phases of TiO2 upon the PVA membranes structural,
morphological, optical and
photoluminescence
characteristics. TiO2
nanoparticles prepared by sol-gel technique and different
phases successfully achieved by controlling calcination
temperature.
PVA/TiO2
membranes were
then fabricated by solution casting method. XRD studies
confirmed the existence of different phases of TiO2
nanoparticles in
PVA. TEM results indicate that the TiO2
nanoparticles size increased as the calcination
temperature increased. The XRD spectrum also shows that doping
enhances the crystallinity of polymer composites. The UV-visible
spectra show decrease in optical energy band gap (Eg) with
different phases
of TiO2
nanoparticles.. This indicates that PVA/TiO2
(brookite)
membrane has
higher
photocatalytic activity than
the other two
composite membranes. The
enhanced
properties of
the PVA/TiO2
composite
membranes, which
incorporate three distinct
phases of
TiO2,
offer benefits
for a
variety of applications.
The XRD results of
the PVA/ZrO2
composite sample
reveal that ZrO2 nanoparticles were successfully
incorporated into PVA matrix and the
crystallinity
of composite
increases with
the addition
of ZrO2.
Our study also indicates that these composites can be
used for UV shielding materials, diodes and optoelectronic
devices. This
comprises the outcomes
of successful
fabrication of PVA/TiO2
and PVA/TiO2/ZrO2
composite
membranes via
solution
casting technique.
The TiO2
and ZrO2 nanoparticles are
formed through the sol gel
method. The benefits of addition
of both
TiO2
and
ZrO2
nanoparticles
together in
PVA matrix
have been
studied using several characterization techniques.
The XRD results
demonstrated the successful fabrication of PVA/TiO2
and PVA/TiO2/ZrO2
nanocomposite membranes. These findings also highlight
the enhanced crystallinity of the nanocomposites. Interestingly,
it was noticed
that PVA/TiO2/ZrO2
membrane
exhibits a
higher degree
of
crystallinity than that of PVA/TiO2
membrane.
The absorption study of composite membranes revealed
a significant
increase in
absorbance
intensity when
moving from
sample PVA
to PVA/TiO2/ZrO2.
Furthermore, notable shifts were observed in the
positions of the absorbance peaks. These results illustrate the
applications for different optical devices. At room temperature,
the composite membranes demonstrate photoluminescence and there
has been a noticeable enhancement in the PL
intensity of
PVA/TiO2/ZrO2
composite
as compared to PVA/TiO2
composite,
indicating its potential suitability
for optoelectronic applications.
[Dr Jyotsna Chauhan, Akansha mehto, Shaswat Chauhan.
Comparative XRD analysis of
PVA/TiO2,
PVA/ZrO2
and PVA/TiO2/ZrO2
Composites. N
Y Sci J
2026;19(10):1-16]. ISSN 1554-0200
(print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
01. Doi:
10.7537/marsnys191026.01
Keywords:
Comparative XRD;
PVA/TiO2;
PVA/ZrO2;
PVA/TiO2/ZrO2 |
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AN INVENTORY
MODEL OF DETERIORATING ITEMS AND LINEAR DEMAND WITH PROCUREMENT
AND REPAIR
Dr. Balbinder
Singh
Supervisor Market
Development Officer, Bayer Science and innovation Pvt Ltd,
Mandi- 175001 (Himachal Pradesh)
Email:
singhbalbinder1986@gmail.com
Abstract:
Inventory
systems for perishable and deteriorating products require
replenishment policies that account not only for customer demand
but also for physical deterioration and the possibility of
recovering usable products through repair or refurbishment. This
paper develops a deterministic inventory model for deteriorating
items in which demand varies linearly with time and inventory
can be replenished through two channels: fresh procurement and
repair of recoverable items. A continuous-review cycle is
considered in which procurement and repair operate during the
replenishment period, followed by an inventory-depletion period.
The deterioration rate is assumed to be proportional to the
inventory level. The model is formulated using differential
equations, and expressions for inventory level, maximum
inventory, cycle length, procurement quantity, repair quantity,
holding cost, deterioration cost, and total average cost are
derived. The optimal replenishment policy is obtained by
minimizing the average inventory cost. A numerical illustration
demonstrates the applicability of the proposed model and shows
that incorporating repair as a supplementary replenishment
source can reduce dependence on fresh procurement while
maintaining service without shortages. The model provides a
useful framework for inventory systems involving reusable,
refurbishable, or recoverable products.
[Singh, B. AN INVENTORY MODEL OF DETERIORATING ITEMS AND
LINEAR DEMAND WITH PROCUREMENT AND REPAIR. N Y Sci J
2026;19(10):17-22]. ISSN 1554-0200
(print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
02. Doi:
10.7537/marsnys191026.02
Keywords:
Inventory model; deteriorating items; linear demand;
procurement; repair; replenishment; holding cost; optimization;
EOQ. |
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Bioremediation of Heavy Metals by Bacteria Isolated from
Mechanic Workshop Soil in Federal Capital Territory, Nigeria
1Oyetunde,
Funmitan Nike and 2Machunga-Mambula, Salamatu
Sangaljala
1Department
of Life Science, National Space Research and Development Agency
2Department
of Microbiology, University of Abuja, Nigeria
1Email:
Ofunmitan@gmail.com
ABSTRACT:
The study on the bioremediation of heavy metal by
bacteria isolated from mechanic workshop soil in FCT, Nigeria
was conducted. A total of fifteen (15) soil samples were
collected at random from motor mechanic shops in Lugbe (Abuja
Municipal Area Council), Kuntunku in Gwagwalada and Dutse-Alhaji
in Bwari, and in Gwagwalada, Bacillus cereus (3) was the
most occurring bacteria, followed by Bacillus licheniformis
(2) and only one (1) B. subtilis, and Pseudomonas
aeruginosa each, were isolated. In Dutse, Bacillus
subtilis (3) and Pseudomonas aeruginosa (2) were the
only bacteria present in the soil samples. Meanwhile, B.
subtilis (3) was the most prevalent in Lugbe soil,
followed by Pseudomonas aeruginosa (2), B. Megaterium
and Klebsiella pneumonia present has only one each.
B. subtilis was the most frequently isolated bacteria
with seven (37%), followed by five Pseudomonas aeruginosa
(26%), three B. cereus (16%), two Bacillus
licheniformis (11%) while and only one (1) B. Megaterium
and Klebsiella pneumonia represented (5%) each was
isolated. No effect was observed on heavy metal reduction by
Bacillus licheniformis and Klebsiella pneumoniae.
Pseudomonas aeruginosa had the most significant remediation
impact on cadmium and lead in the soils from the mechanic
workshop. Bacillus megaterium had a cadmium reduction of
1.24±0.00 µg/g and 1.36±0.00 µg/g of lead while Bacillus
subtilis and Klebsiella pneumoniae had no reduction
in the concentration of cadmium. However, further study should
be carried out to ascertain the bioactive substance in
Pseudomonas aeruginosa responsible for the bioremediation of
heavy metals such as lead and cadmium.
[Oyetunde, Funmitan Nike and 2Machunga-Mambula,
Salamatu Sangaljala. Bioremediation of Heavy Metals by
Bacteria Isolated from Mechanic Workshop Soil in Federal Capital
Territory, Nigeria.
N Y Sci J
2026;19(10):23-30]. ISSN 1554-0200
(print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
03. Doi:
10.7537/marsnys191026.03
Keywords:
Bioremediation; Heavy metals; Bacteria |
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The manuscripts in
this issue were presented as online first for peer-review.
All comments are
welcome: newyorksci@sciencepub.net,
or contact with
author(s) directly.
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New York
Science Journal, click
here.
Emails: newyorksci@sciencepub.net;
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