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    <dc:date>2026-04-15T07:09:50Z</dc:date>
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  <item rdf:about="https://ir.vidyasagar.ac.in/jspui/handle/123456789/6313">
    <title>Evaluation of work related health problems of carpenters and an ergonomic intervention in the carpenter’s hand tool and workstation</title>
    <link>https://ir.vidyasagar.ac.in/jspui/handle/123456789/6313</link>
    <description>Title: Evaluation of work related health problems of carpenters and an ergonomic intervention in the carpenter’s hand tool and workstation
Authors: Chatterjee, Mousumi
Abstract: Introduction: Carpentry is one of the common small-scale industries which contribute to &#xD;
Indian economy. A cluster of carpentry workshop has been originated in different states of &#xD;
India such as, West Bengal, Assam, Orissa, Madhya Pradesh, Rajasthan, Karnataka, Kerala &#xD;
etc. Different districts of West Bengal, such as, Paschim Medinipur, Bankura, Purulia etc. &#xD;
are the virtuous standby bunch zone of carpenters. &#xD;
Carpentry task is an assemblage exertion work in a firmly corresponding method by some &#xD;
carpenters. Every group is made up of2-3 numbers of varied workforces, executing diverse &#xD;
categories of carpentry work. The main responsibilities are – (i) cutting the raw wood by &#xD;
sawing, (ii) planning the wood for further preparation of furniture, (iii) designing and fine &#xD;
cutting of wood by the chisel. According to the responsibilities the carpenters were divided &#xD;
in to three major categories, viz. saw users, plane users and chisel users. They work in a &#xD;
group and some of them were habituated to perform all three tasks. &#xD;
Carpenters, who had to execute their task by exercising physical effort, were exposed to &#xD;
some occupation associated health hazards and stresses. The significant contributing reasons &#xD;
might be an improper procedure of work, unusual posture, extreme job pressure, physical &#xD;
stresses, non-ergonomically designed workshop, and etc. The job associated strains might &#xD;
have certain effects on the health and performance of the carpenters.  &#xD;
Some difficult postures adopted by the workers l i ke,  bending, overstretching, squatting, &#xD;
crouching, twisting etc. at the time of executing the carpentry task. Those kinds of posture &#xD;
mostly lead to postural stress among the workers. &#xD;
Some human factors related to the carpentry work were studied in this research work. &#xD;
Priority has been given to appraise the general health status, occupation related MSD, work &#xD;
posture, work-rest cycle, and physical variations of the carpenters. Carpenters had to execute &#xD;
their task in a workstation which must be suitable to them and their tasks. It was required to assess the workstation from the ergonomics and human factors points of view.  Ergonomic &#xD;
intervention was necessary to reduce the extent of mismatch between the workers and &#xD;
various components of the workstation. A number of hand operated tools were used by the &#xD;
carpenters in their workshop. Ergonomics evaluation of those tools as well as ergonomics &#xD;
modification of the hand tools might be required to ensure the better productivity and well &#xD;
being of the workers.  &#xD;
The followings were the objectives of the present research study – &#xD;
 &#xD;
i. To assess the socioeconomic and nutritional status of the carpenters. &#xD;
ii. To evaluate musculoskeletal disorders and the discomfort level of the carpenters. &#xD;
iii. To evaluate the postural stress of the carpenters  &#xD;
iv. Ergonomic intervention for redesigning the conventional workstation and hand tool &#xD;
(carpenters chisel) used by the carpenters. &#xD;
Methods: To accomplish the said objectives the succeeding procedures were employed. The &#xD;
whole study was conducted in different carpenter's workshops of Paschim Medinipur &#xD;
districts of West Bengal state in India. For the execution of this research work 256 of male &#xD;
(18-60 years) carpenters were chosen arbitrarily. All those selected subjects volunteered to &#xD;
this study. &#xD;
The carpenter’s socio-economic position was estimated by modified Kuppuswami scale (Raj &#xD;
et.al. 2015). The workers educational status was appraised through questionnaire procedure &#xD;
and nutritional status of the workers was assessed by using anthropometric guides like, body &#xD;
mass index (BMI), body fat (BF%) etc. Anthropometric study (height, weight, BMI) was &#xD;
made through standard measurement method (as per WHO, 1986 guidelines). Modified &#xD;
‘Nordic’ questionnaire technique was applied for determining the occupation related &#xD;
musculoskeletal disorder of carpenters. Discomfort or pain in different body parts of the &#xD;
workers was rated through10-point Borg’s scale. By scheming the genuine work time and break time of entire work shift, the work-rest cycle was assessed. It was detected through &#xD;
video-photography method from beginning to end of the work shift.  &#xD;
By using OWAS, RULA, REBA and QEC methods, the postural pattern of the carpenters &#xD;
was assessed. In addition, direct observation, video photographic technique was also &#xD;
employed. By determining of blood pressure and heart rate (HR) (during both resting and &#xD;
working situations) cardiovascular status of the carpenters was estimated and from the &#xD;
resting and mean working heart rate CSI (cardiovascular stress index) was calculated. &#xD;
The whole body-center of gravity of the carpenters was determined by the segmental &#xD;
method. Different body joint angles of the carpenters was measured by a digital goniometer. &#xD;
the EMG study of different work posture of carpenters were evaluated by BioGraph Infiniti &#xD;
system (Pate-1). The Pulmonary function parameters of the carpenters were evaluated by &#xD;
using a digital spirometer. Different pulmonary parameters like, FVC FEV&#xD;
1,&#xD;
PEF and MVV-index were assessed. Furthermore, by using FEV&#xD;
1&#xD;
value &lt;70%) the occurrence of COPD was determined.  &#xD;
 FEF&#xD;
25%-75%&#xD;
/FVC value (minimum &#xD;
Different hand tools were used by the carpenters for executing different tasks of carpentry &#xD;
work. Carpenter’s chisel, which was one of the most frequent used tool of the carpenters, &#xD;
was redesigned with an emphasis to the man- tool interface. Some of the steps followed for &#xD;
redesigning the chisel were: (i) assessment of conventional chisel, (b) some concept of &#xD;
design was developed and prototypes were prepared (c) restructured the conventional chisel &#xD;
handle and (d)  restructured chisel was evaluated by employing some methods such as &#xD;
subjective evaluation, joint angle study, heart rate study and productivity study. &#xD;
For optimizing the height of workstation for the plane users, some synchronized steps were &#xD;
applied. In the beginning, the disadvantages or problems of the design of the conventional &#xD;
workstation was evaluated by cross-examining the users, assessing BPD and determining &#xD;
joint angles of the users and assessing the postural stress at the time of using the conventional workstation by study of EMG. Ultimate design of the workstation was executed by a psychophysical study, and by study of productivity. Results and Discussion: The results of the present research work represented that most of &#xD;
the carpenters were belonging to lower socioeconomic category according to the modified &#xD;
Kuppuswami scale. They had a poor nutritional status. Depending to Chronic Energy &#xD;
Deficiency (CED) categorization ( WHO, 1995)  it was found that a distinguished proportion &#xD;
of carpenters were within the range of under nourished (&lt;18.50 kg/m2) category. &#xD;
Around82% of the carpenters were belongings to normotensive category and nearly15% of &#xD;
the workers were within the hypotensive range. &#xD;
The findings of occupation related musculoskeletal disorders exhibited that nearly all of the &#xD;
body parts were affected during execution of carpentry tasks. Maximum pretentious body &#xD;
segments were lower back (85.55%) and waist (78.52%), knee (69.14%), shoulder (69.14%) &#xD;
and neck (61.72%) of carpenters in view of all tasks together. Significantly higher &#xD;
prevalence of MSD was observed in some of the body parts of the carpenters.  In all kinds of &#xD;
carpentry tasks musculoskeletal problems were found in the lower back, wrist and knee &#xD;
portion of the body, but problem was enormously predominant during chiseling and &#xD;
planning task. Saw operators were extremely affected by knee problems. Problems in lower &#xD;
back of the body were highly prevalent for chisel users (95.12%) and plane users (86.21%). &#xD;
The prevalence of MSD was also observed very high in higher and lower experience groups &#xD;
of carpenters than that of middle experience group workers.  &#xD;
The results of body part discomfort rating (BPD) exposed that the workers involved in &#xD;
various carpentry tasks had different degrees of BPD. During chisel and plane operations, &#xD;
severe pain (BPD&gt;7) was found in shoulder and lower back of the body. Moderate level of &#xD;
pain (BPD&gt;4 to 7) was detected in neck and hand arm system among the workers involved &#xD;
in all kinds of carpentry tasks. According to the work experience the of BPD rating was found to be greater in higher and lower experience group than that of middle experience &#xD;
group. This ache or discomfort might be related to inappropriate working posture, poor work &#xD;
environment along with high work load in the work place.  &#xD;
The most important factor in the job-related stress was the total duration of a work shift. The &#xD;
work-rest cycle exhibited that the overall working time was around 8 to 9 hours including &#xD;
rest pauses. The total time of work shift was the maximum in chisel operation followed by &#xD;
the plane and saw operation.  &#xD;
The cardiovascular stress index (CSI) was high in different tasks of carpenters. The CSI and &#xD;
work-rest period was found to be closely related. It was recommended that within the work &#xD;
shift the carpenters might take more frequent short breaks instead of a long duration break.  &#xD;
As per the results of different posture analysis procedures, the work postures adopted by the &#xD;
carpenters had ‘moderate’ ‘to ‘very high’ levels of risk in different tasks of carpentry. The &#xD;
workers were suffering from occupation associated health hazards, feasibly for extended &#xD;
working periods along with assuming awkward postures. In this study it was observed that &#xD;
three different postures were predominant for three different tasks of carpenters. Most of the &#xD;
time the chisel users adopted forward bending posture while sitting with folded legs. The &#xD;
plane users had to work in forward bending posture understanding condition. The &#xD;
predominant posture of the saw users was the forward bending with one leg folded at upper &#xD;
position. Prolonged squatting and bending postures were the main reasons for the occurrence &#xD;
of MSD in the lower part of the body.  From the results of postural assessment it was found &#xD;
that the tasks of carpenters had a great risk and needed immediate corrective measures.  &#xD;
Results of the center of gravity showed that the location of CG was deviated from that of &#xD;
reference position under normal erect posture. In EMG study there are vast deviation was &#xD;
found in different muscle for different body posture which and also significant difference was found among in three different task of carpentry. The RMS values of EMG for fore arm &#xD;
muscle was highest in stressed during chisel operation and for   the biceps and triceps &#xD;
muscles that RMS values was highest during plane operating task.  &#xD;
Further vital aspects of posture related stress was higher occurrence of job related &#xD;
musculoskeletal disorders and rigorousness of discomfort rating. At the time of executing &#xD;
different task of carpentry, the workers had to assume numerous types of difficult postures. &#xD;
In different task of carpentry, the workers had to adopt different work posture. For chiseler &#xD;
they had to adopt sitting with folded legs for about 85.50% of the total work time where &#xD;
wise plane users and saw users had to adopted erect with forward bending and erect with one &#xD;
leg folded at upper position (forward Bending) respectively for maximum time of the work &#xD;
period.  &#xD;
The evaluation of blood pressure (BP) of carpenters indicated that approximately 82% of &#xD;
workers were in normotensive category. The study of heart rate revealed that mean working &#xD;
heart rate of the carpenters was120.86±9.90 and peak working heart rate was 129.04±8.77. &#xD;
Depending on mean working heart rate, the work load of tasks of the workers was &#xD;
categorized as light to heavy. The chiseling and sawing tasks were within the range of &#xD;
moderate category. &#xD;
The Cardiovascular stress index (CSI) of the woodworkers uncovered that they were &#xD;
imposed to cardiovascular stress during performing out their diverse carpentry assignments. &#xD;
There was a little variety in CSI among chisel users (CSI values 30.24) and plane users (CSI &#xD;
esteem 33.07). Both of the work had high cardiovascular pressure. Be that as it may, CSI &#xD;
estimation of saw activity (25.18) was beneath than other two tasks. The term of working &#xD;
activity was discovered which was identified with the cardiovascular stress. The work-rest &#xD;
pattern of various classes of woodworkers has been examined and its outcomes were &#xD;
contrasted with the CSI values. The similar outcomes uncovered that more prominent the level of work time, more noteworthy was the CSI level and the other way around. &#xD;
The results of the pulmonary function tests showed that all the pulmonary variables (FVC, &#xD;
FEV&#xD;
1&#xD;
, FVC/FEV&#xD;
1&#xD;
average FVC, FEV&#xD;
1&#xD;
, EF&#xD;
25%-75%&#xD;
, PEF, and MVV-index) were below the normal range. The &#xD;
, FVC/FEV&#xD;
1&#xD;
, PEF, EF&#xD;
25%-75%&#xD;
, and MVV-index were 3.21±0.41 litters, &#xD;
3.04±0.56 litters, 82.12±9.43%, 6.65±1.07 litters/minute, 3.78±1.21 litters/minute and &#xD;
84.16±13.0 litters/minute respectively. There was prevalence of COPD and other pulmonary &#xD;
dysfunctions among the laborers. The diminished estimations of these pneumonic factors &#xD;
may The lower score the pulmonary function variables might be because of long time &#xD;
exposure of the wooden dust in the workstation. These problems were aggravated among the &#xD;
workers those who were addicted to smoking.  &#xD;
Two ergonomic interventions were employed to lessen the work related health problems of &#xD;
the carpenters. &#xD;
In the first intervention the chisel, a commonly used hand tool, was evaluated and modified &#xD;
the design of the tool from ergonomic point of view. The carpenters needed to hold the &#xD;
chisel firmly using one of their hands during performing the work. During holding and &#xD;
applying intense force, the chisel user felt distress at the various parts of the body, viz., &#xD;
fingers, palm, wrist and shoulder. An endeavor has been made to redesign the chisel handle &#xD;
considering the human factors. The problems using the conventional handle interface was &#xD;
assessed. Some design ideations were initiated to eliminate the drawbacks. As per proposed &#xD;
ideations the size, shape and texture of the handle were modified and according to that four &#xD;
prototype models were made. In such concepts hand dimensions of the carpenters were &#xD;
incorporated. The psychophysical evaluation of the prototypes was made by means of paired &#xD;
comparison test.  &#xD;
Following adjustments were made to renovate the handle of the chisel.  &#xD;
i. The length of the handles was expanded for proper holding of the tool by considering the hand length of the users and the results of the paired comparison test.  &#xD;
ii. The diameter of the handles was modified according to the inner hand grip of the &#xD;
users as well as the finding of the paired comparison test.  &#xD;
iii. The shape of the handle was selected from the best scores of the Paired comparison &#xD;
test so that the slippage of the palm could be prevented.  &#xD;
iv. A rubber grip was incorporated at the gripping area of the handle for firm gripping &#xD;
during working.  &#xD;
v. A safety guard made of thick rubber plate was fitted above the holding area of handle &#xD;
for preventing mishit of the hammer.  &#xD;
The overhauled chisel was assessed by a few boundaries, The renovated chisel was &#xD;
examined by some parameters, viz., prevalence of MSD, joint angle study, working pulse &#xD;
rate and productivity study. The consequences of these investigations showed that the &#xD;
redesigned chisel was more efficient, easy to operate and less stressful.  &#xD;
The second ergonomic intervention was the optimization of the height of the workstation for &#xD;
performing various tasks of the carpenters, especially for the plane operators.  The existing &#xD;
height of the work surface of the plane operators was varied from one place to another. The &#xD;
average height of the same was about 60.3 cm. Such conventional workstation produced &#xD;
various musculoskeletal problems during doing the work. To find optimum height of the &#xD;
workstation some prototype models of the workstation were made with varied &#xD;
heights,viz.,65 cm, 70cm and 75 cm. Those prototypes were tested by paired comparison &#xD;
test. The prototype which yielded the best score was selected for optimization of the height. &#xD;
In addition to the 5&#xD;
th&#xD;
 percentile value of the standing height of the users was also taken into &#xD;
account. Further, EMG studies were conducted on shoulder and back muscles and found that &#xD;
least myoelectric activities were noted. All the experimental studies revealed that the best &#xD;
height of the workstation was 70.0cm. The optimized workstation was tested with by computing body joint angles, prevalence of MSD and body part discomfort rating. All &#xD;
results were in favour of redesigned workstation. Moreover, productivity study was also &#xD;
supported these findings.  &#xD;
Conclusion: From the above discussion, it could be inferred that the prevalence of work &#xD;
related musculoskeletal issues (WRMSD) was observed among the woodworkers. They &#xD;
were experiencing various WRMSD. The major affected body parts were the lower back, &#xD;
wrist, shoulder, neck, and knee. The magnitude of pain or discomfort rating was also high in &#xD;
those body sections. &#xD;
The postural stress was high among the workers because of adopting awkward working &#xD;
posture for a long time. The higher pervasiveness of MSD and occurrence of pain or &#xD;
discomfort rate was related with the postural stress. The work related health hazards &#xD;
alongside postural stress could be diminished by adjusting the work-rest cycle.  &#xD;
Proper usage of redesigned chisel and optimized workstation might relieve the carpenters &#xD;
from work associated health hazards and enable them to achieve better productivity. Thus &#xD;
the results of the study might provide well being of the carpenters. &#xD;
,</description>
    <dc:date>2021-11-22T00:00:00Z</dc:date>
  </item>
  <item rdf:about="https://ir.vidyasagar.ac.in/jspui/handle/123456789/6267">
    <title>Anticancer efficacy of surface coated copper oxide nanoparticles: A mechanistic study comprising  immunomodulation</title>
    <link>https://ir.vidyasagar.ac.in/jspui/handle/123456789/6267</link>
    <description>Title: Anticancer efficacy of surface coated copper oxide nanoparticles: A mechanistic study comprising  immunomodulation
Authors: Dey, Aditi
Abstract: In the current study, we synthesized Copper Oxide Nanoparticles (CuONPs) by chemical and&#xD;
green synthesis methods. Several chemicals were used in the chemically synthesized method,&#xD;
whereas in green method, water extract of Azadirachta indica (A. indica) leaves were used. In&#xD;
case of both synthesis methods, Copper sulphate salt was used as a precursor. After completion&#xD;
of synthesis, several physio-chemical techniques were used such as FT-IR, DLS, Surface Zeta&#xD;
potential, EDX, XRD, SEM and TEM to confirm the synthesis of both nanoparticles. The GC&#xD;
mass analysis was performed to know the bioactive components of water extracts of A. indica&#xD;
leaves. The anti-oxidant property and radical scavenging property have been estimated by taking &#xD;
ascorbic acid as a reference. The green synthesized CuONPs showed significant anti-oxidant and &#xD;
radical scavenging activity, which may be due to bioactive components of A. indica leaf extracts.&#xD;
Then the toxicity difference between the chemical CuONPs and green CuONPs was evaluated in&#xD;
in vitro and in vivo models. The result showed that green CuONPs is less toxic compared to the&#xD;
chemical one. However green CuONPs showed toxicity at higher doses. Hence from the toxicity&#xD;
point of view, we selected green CuONPs for further study. &#xD;
The in vitro and in vivo anticancer efficacy was evaluated using green synthesized CuONPs.&#xD;
Breast cancer (MCF-7 cells) and cervical cancer (HeLa cells) were used throughout the study&#xD;
and 4T1 cells were injected in subcutaneous abdominal mammary pad in Balb/c mice for solid&#xD;
tumor model. Green CuONPs liberate Cu ions by leaching, which internalized inside the cancer&#xD;
cells in a dose dependent manner. The liberated Cu ions were able to produce ROS which will&#xD;
indirectly induce pro-inflammatory cytokines level and then apoptosis by mitochondrial and nonmitochondrial&#xD;
mediated&#xD;
pathway.&#xD;
&#xD;
&#xD;
To reduce the toxicity of green CuONPs, its surface was coated with cationic biopolymer&#xD;
Chitosan (CS) to reduce the toxicity and able to specifically target the cancer cells due to cationic&#xD;
surface charge of CS as the cancer cells were negatively charged. CS has been chosen due to its&#xD;
pH responsive nature that facilitates the release of Cu ions from CuONPs@CS in acidic cancer&#xD;
cell environment. So, the release of Cu ions from CuONPs@CS in normal cells became reduced.&#xD;
Surface coated green CuONPs (CuONPs@CS) showed significant apoptosis in cancer cells. The&#xD;
underlying mechanism of apoptosis was investigated here. The surface coated NPs induced pro-inflammatory cytokines level and simultaneously reduced the level of the anti-inflammatory&#xD;
cytokines. Immuno-histochemistry and cytokine analysis showed that the involvement of&#xD;
cascade of Caspases is the key phenomenon of apoptosis.  CuONPs@CS showed a significant&#xD;
reduction of tumor weight after 30 days of treatment in mice model. &#xD;
The CuONPs@CS being an immunostimulant was able to activate the cellular as well as&#xD;
humoral immune response. The CD4+ expression and secretion of pro-inflammatory cytokines&#xD;
indicated the activation of T cells and macrophages which destroyed the cancer cells in in vitro&#xD;
and in vivo models. Alongside humoral immunity, response was triggered by the CuONPs@CS&#xD;
through IgG response, which indicated the adjuvant role of the nano conjugate. Th1 (Type 1  and&#xD;
Type 2 helper T cells) and Th2 cells were  activated after the treatment with nano conjugate and&#xD;
acts as an immunostimulant which would inhibit the proliferation of breast cancer (MCF-7) and&#xD;
cervical cancer (HeLa) cells in in vitro and in vivo Balb/c mice model. The secretion of proinflammatory&#xD;
cytokines&#xD;
and&#xD;
the&#xD;
increase&#xD;
in&#xD;
CD4+&#xD;
&#xD;
populations indicated the activation of&#xD;
immune cells in the current study. Immunotherapy by the help of metal nano conjugate&#xD;
(CuONPs@CS) can be an effective tool to wipe out the cancer cells from the system.  &#xD;
The CuONPs@CS was finally coated with folic acid to specifically target the cancer cells as the&#xD;
folate receptor was overexpressed on cancer cells. Green synthesized CuONPs have widespread&#xD;
anti-cancer activity, but the incompetent targeting ability of these metal based nanoparticles is&#xD;
the main obstacle. To overcome this difficulty here we synthesized a folic acid (FA) and chitosan&#xD;
(CS) coated nano vehicle to effectively diminish off-target effects by increasing intracellular NPs&#xD;
concentration in cancer cells and subsequently reducing the burden of cytotoxicity against&#xD;
normal lymphocytes. HeLa and MCF-7 cancer cells were used here as in vitro model, where&#xD;
CuONPs@CS@FA internalized through folate receptor mediated endocytosis pathway.&#xD;
Sustained release of NPs inside the cancer cells destroyed the mitochondrial membrane potential&#xD;
and produced ROS which caused apoptosis. 4T1 cells induced solid tumor burden in Balb/c&#xD;
mice, significantly reduced by CuONPs@CS@FA. Our multi layered coated conjugate could be&#xD;
an effective NPs delivery system for anti-cancer therapy, without creating any severe toxicity&#xD;
towards normal cells. &#xD;
 The overall study complies with the dynamic functional properties of surface coated CuONPs,&#xD;
which acts as a smart tool to destroy the cancer cells without significant toxicity. The nano conjugate acts as a targeted NPs delivery system and immunostimulant, which can activate the&#xD;
immune cells of our system.  &#xD;
 &#xD;
Keywords: MCF-7, HeLa, Cytokines, apoptotic markers, Balb/c, Copper Oxide nanoparticles,&#xD;
Reactive Oxygen Species, toxicity.</description>
    <dc:date>2021-08-19T00:00:00Z</dc:date>
  </item>
  <item rdf:about="https://ir.vidyasagar.ac.in/jspui/handle/123456789/6143">
    <title>Ecological studies on fungi of Subarnarekha river, India with special reference to the role of Aspergillus penicillioides as bioremediator</title>
    <link>https://ir.vidyasagar.ac.in/jspui/handle/123456789/6143</link>
    <description>Title: Ecological studies on fungi of Subarnarekha river, India with special reference to the role of Aspergillus penicillioides as bioremediator
Authors: Paria, Kishalay
Abstract: Rivers representing the lifeline of the human being is now under great threats generally due to &#xD;
the different anthropogenic activities including large scale abstraction of river water for &#xD;
agriculture, wasteland reclamation, afforestation, industrial activities, fishing and aquaculture, &#xD;
wetland drainage operation of hydroelectric power stations etc. Bio-recalcitrant of the ores of &#xD;
heavy metal as major result in disruption of ecological balances and ultimately push the &#xD;
erstwhile pristine river into an eco-degraded landscape. Out of many rivers in India, &#xD;
Subarnarekha (21°33′ to 23°32′ north latitude and 85°9′ to 87°27′ east longitude) is a &#xD;
transboundary river which traverses through the landscapes of three states viz. Jharkhand, West &#xD;
Bengal and Odisha, India. This research study was initiated with the prime objective to study &#xD;
the ecology of benthic fungi which have the potential for bio-accumulation and bio- removal of &#xD;
a persistent toxic substance such as heavy metals i.e. lead (Pb-II), cadmium (Cd- II) and &#xD;
mercury (Hg-II). The study was aimed to record the ecological changes of the river temporarily &#xD;
and spatially in fungal diversity and bio-potential for removing heavy metals from three eco-&#xD;
contrasting astudy sites i.e. Muri (S-I), Sonakonia (S-II) and Talsari (S-III) through different &#xD;
months (24) and seasons (6) of two (2) consecutive years (July, 2012-June, 2014) of &#xD;
Subarnarekha river along with recorded hydro-biological parameters. From this study a total of &#xD;
112 soil-inhabiting fungal isolates were recorded from different stretches of the Subarnarekha &#xD;
river basin. Out of the major soil-inhabiting fungi of the river ecosystem, the fungal species, &#xD;
Aspergillus penicillioides (F12) was found to exhibit the highest heavy metal tolerance activity. &#xD;
This strain of fungus was identified by the ITS genetic system and deposited into the gene bank &#xD;
(MN210327). It exhibited resistance against Hg (II) up to 200 ppm but Pb (II) and Cd (II) up to &#xD;
1000 ppm. The heavy metal binding regions of fungus were determined by FTIR, SEM and &#xD;
EDEX analysis. The specific extracts from (secondary metabolites from cultured media) this &#xD;
species has also revealed antibacterial activities by proving their effectiveness as a potential inhibitor against human pathogenic gram-positive bacteria, Bacillus subtilis and Staphylococcus &#xD;
aureus and gram-negative bacteria, Vibrio cholerae, and Escherichia coli. &#xD;
The studied fungal strain A. penicillioides was seen to release higher quantity of &#xD;
exopolysaccharide (EPS), which helps absorb heavy metals in maximum amount. In view of &#xD;
such observation, such circumstance, it can be concluded that both EPS and biomass of fungal &#xD;
strain are supposed to be responsible for the bioremediation of heavy metals from the riverian &#xD;
flow. This study also emphasizes the optimization of processes of different physicochemical &#xD;
parameters [pH, time (h) and temperature (°C)] by employing Box- Behnken Design (BBD) of &#xD;
experiments, in order to achieve the bio-absorption capability of heavy metal [lead (Pb II)] from &#xD;
Subarnarekha river estuary by EPS of Aspergillus penicillioids (MN210327). From statistical &#xD;
analysis (ANOVA), the optimized bio-absorption (72.76%) of Pb (II) by EPS was obtained at &#xD;
pH of 11, the temperature of 37.57 °C, for a period of 8 hours. Besides, the flocculating activity &#xD;
was noted as the highest (88.4%) at a concentration of 0.5 mg/l EPS and the emulsifying &#xD;
activity of EPS was found to be about 50%. The research findings of the present study indicate &#xD;
that biomass and EPS of Aspergillus penicillioides can act as good emulsifier, flocculent and &#xD;
heavy metals (Pb II, Cd II, Hg II) remediator. This study also offers the possibility of the &#xD;
development of an alternative method for eco-sustainable bioremediation by fungal EPS which &#xD;
can be applied in the wastewater treatment plant. Besides, seasonability for ecological &#xD;
parameters for a transboundary river has been recorded with the establishment of some (sensitive &#xD;
and tolerant) bioindicator of fungal strain as a part of biomonitoring of the ecological changes. &#xD;
 &#xD;
Keywords: Heavy metals; Flocculation; Emulsification; Box-Behnken design; Transboundary &#xD;
River; Benthic fungi; Bioremediation; Bio-indicator.</description>
    <dc:date>2021-07-26T00:00:00Z</dc:date>
  </item>
  <item rdf:about="https://ir.vidyasagar.ac.in/jspui/handle/123456789/5924">
    <title>Generation of novel anti-Leishmania vaccine</title>
    <link>https://ir.vidyasagar.ac.in/jspui/handle/123456789/5924</link>
    <description>Title: Generation of novel anti-Leishmania vaccine
Authors: Zutshi, Shubhranshu
Abstract: Leishmaniasis is a neglected, tropical disease caused by the protozoan parasite Leishmania &#xD;
which affects millions of people worldwide. During past many decades, numerous vaccine &#xD;
candidates have been tested against various forms of leishmaniasis, but convincing results &#xD;
are yet to be achieved. Selection of a judicious vaccine candidate from plethora of &#xD;
antigenic proteins is a crucial step in designing an efficacious vaccine. In this study, we &#xD;
identified virulence factors of Leishmania based on their expression levels inside &#xD;
peritoneum-derived primary macrophages post-infection. NAD+ synthase, adenylate &#xD;
kinase, LmjF_36_3850, phosphatidic acid phosphatase, thiol-dependent reductase 1, &#xD;
LmjF_33_2620 was observed to be significantly down-regulated in avirulent as compared &#xD;
to virulent strain, and were identified as probable virulence factors and potential vaccine &#xD;
candidates. Hence, we cloned LmjF_36_3850 in pcDNA6/HisA and evaluated its &#xD;
antigenicity and protective efficacy in L. major challenge model. DNA vaccination with &#xD;
LmjF_36_3850 elicited IgG2a and IgG1 to similar extent and produced mixed Th &#xD;
response. Upon s.c. challenge of 2x10 6  L. major stationary phase promastigotes, &#xD;
vaccinated mice were unable to control disease progression and had higher parasit ic load in &#xD;
draining lymph node. Expression levels of Th2 cytokines such as IL-4 and IL-10, co-&#xD;
inhibitory molecule such as CTLA-4, were found to be higher in lymphocytes of DNA &#xD;
vaccinated mice. Moreover, CSA re-stimulated lymphocytes from vaccinated mice after &#xD;
challenge infection secrete less IFN-γ than controls and comparable levels of IL-10 as &#xD;
compared to non-vaccinated, L. major-infected mice. Also, population of pro-parasitic IL-&#xD;
4, IL-10 and IL-17 secreting Th2-, Treg- and Th17-TEM found to be higher; while population of IFN-γ secreting Th1-TEM  and TCM  cells, respectively, were  cells were lower in LmjF_36_3850 vaccinated mice as compared to control groups. Thus, DNA vaccination &#xD;
with LmjF_36_3850 was unable to protect mice from L. major challenge. &#xD;
Next, to analyze the potential of Heterologous prime-boost (HPB) strategy against L. &#xD;
major challenge, we cloned L. major adenylate kinase (LmAdeK) in pcDNA6/HisA and &#xD;
pet28a+. We purified rAdeK by Ni-NTA affinity resin and analyzed immunogenicity and &#xD;
protective efficacy of different groups. HPB vaccination with LmAdeK was able to elicit &#xD;
higher levels of Th1-associated IgG2a antibody and lower IgG1 levels than other &#xD;
vaccination strategies and control groups. IgG2a/IgG1 ratio was higher in HPB vaccinated &#xD;
mice than other vaccinated groups and controls and was skewed towards Th1 type. Also, &#xD;
IgG2a levels in HPB vaccinated mice were higher after five weeks of challenge infection. &#xD;
HPB vaccinated mice were able to better control lesion progression in footpad and have &#xD;
lower parasitic load in draining lymph node than other groups. Also, HPB vaccinated mice &#xD;
had higher IFN-γ and lower IL-4, IL-10, CTLA-4 expression in lymphocytes of draining &#xD;
lymph node. Moreover, HPB vaccinated mice had lower population of IL-17 and IL-10 &#xD;
secreting Th17-TEM, TCM and Treg-TEM lower repertoire of IL-4 secreting Th2-TEM &#xD;
 cells, respectively. HPB vaccinated mice have and CM  cells, although levels of IFN-γ &#xD;
secreting cells were lower than the rAdeK-vaccinated group. Hence, HPB vaccination &#xD;
strategy was more effective in controlling disease progression and parasitic burden than &#xD;
other vaccination strategies and contains higher IFN-γ expressing lymphocytes and &#xD;
decreased population of pro-leishmanial cytokine secreting Th2-, Th17- and Treg- memory &#xD;
cells. Thus, vaccination strategy plays a vital role in eliciting a host-protective immune &#xD;
response.</description>
    <dc:date>2021-03-03T00:00:00Z</dc:date>
  </item>
</rdf:RDF>

