20 research outputs found
Filtration performance of needle-punched nonwoven air filter media through dyeing processĀ
Viscose fibre has been dyed with various dye concentrations and the needle-punched nonwoven fabrics are prepared using the dyed fibre, keeping machine parameters the same. The physical properties, such as tenacity & bursting strength, and functional performance properties, such as mean flow pore size, filtration efficiency & pressure drop, are measured. It is found that the dyeing plays a big role in altering the overall performance of the needle-punched nonwoven. The tenacity of the needle-punched nonwoven fabric is reduced as dye concentration is increased. Filtration efficiency is measured for three different sizes of particles, namely 3Āµm, 5Āµm, and 10Āµm. For all three cases, the filtration efficiency is increased initially till 3% dye concentration and beyond that it is reduced.
Quantification of binder fibres in needle-punched nonwoven and its influenceĀ on physical-mechanical-functional properties of an air filter mediaĀ
A nonwoven filter (viscose fibres) with an optimal design has been developed by controlling the binder fibres (fibres in the vertical direction) in the needle-punched nonwoven. Box and Behnken design in conjunction with 3D surface analysis has been used to study the effect of punch density, needle penetration depth and stroke frequency, considering the percentage of binder fibres in the overall structure on thickness, tenacity, air permeability and filtration efficiency of the filter. In this work, all the above properties are explained in the light of the considered structural index āpercentage of binder fibresā. It is observed that the percentage of binder fibres increases with the increase of all three considered punching parameters. The thickness and tenacity are found to be decreased and increased respectively, with the increase of binder fibre percentage. The air permeability initially decreases and then increases with the increase in the percentage of binder fibres, whereas the filtration efficiency shows the opposite trend
Death with functioning kidney transplant: an obituarial analysis
Death with a functioning kidney graft (DWFG) is now a major cause of graft loss after renal transplantation, occurring in up to 40% of cases. Its occurrence provides insight into the medical care of subjects with a functioning kidney transplant. In this study, we used the time to DWFG as an endpoint, to test whether improved medical care has contributed to better kidney transplant outcomes.
We used single-center data from the Milwaukee Regional Medical Center and Froedtert Hospital, on kidney-only transplants from 1969 through 2005. A total of 3,157 kidney transplants were done at our center during this time. There were 714 deaths with functioning kidney. We also recorded the major causes of DWFG over the time period from 1969 through 2005 divided into 3 epochs. The data were analyzed as a serial collection of yearly obituaries.
The time to DWFG has increased to 10Ā years despite a 20-year increase in the mean age of transplant recipients over the same time period.
Better pre-transplant evaluation, improved treatments for hypertension and hyperlipidemia, improved management of acute myocardial infarction, superior immunosuppressive protocols and better prophylaxis and treatment of infectious diseases have all likely contributed to this trend
Cell-Free DNA and Active Rejection in Kidney Allografts
Histologic analysis of the allograft biopsy specimen is the standard method used to differentiate rejection from other injury in kidney transplants. Donor-derived cell-free DNA (dd-cfDNA) is a noninvasive test of allograft injury that may enable more frequent, quantitative, and safer assessment of allograft rejection and injury status. To investigate this possibility, we prospectively collected blood specimens at scheduled intervals and at the time of clinically indicated biopsies. In 102 kidney recipients, we measured plasma levels of dd-cfDNA and correlated the levels with allograft rejection status ascertained by histology in 107 biopsy specimens. The dd-cfDNA level discriminated between biopsy specimens showing any rejection (T cell-mediated rejection or antibody-mediated rejection [ABMR]) and controls (no rejection histologically), P1% indicate a probability of active rejection
Literary review of Sapeksha Nidana of Sheetpitta, Udarda and Kotha.
Ayurveda is the oldest system of medicine which comprises detailed study of diseases and their treatment in a unique way. The differential diagnosis of a disease is needed today as diseases which present with similar clinical pictures create confusion in their treatment. Sheetpitta, Udarda and Kotha are characterized by itchy wheal formation; however, these diseases can be differentiated on the basis of Dosha involvement and treatment available in classical texts
Clinical review on comparative study of two different formulations Amritadi Kwatha and Kandughna Mahakashaya Ghan Vati on the basis of clinical efficacy in patients of Udarda
Present study deals with study and comparison of two ayurveda formulations in the patients of Udarda. Amritadi Kwath and Kandughna Mahakashaya Ghan Vati were used in separate groups of patients and their effect was compared. Kandughna Mahakashaya Ghan Vati was found to be more effective in the patients of Udarda
Quantification of binder fibres in needle-punched nonwoven and its influence on physical-mechanical-functional properties of an air filter media
204-217A nonwoven filter (viscose fibres) with an optimal design has been developed by controlling the binder fibres (fibres in
the vertical direction) in the needle-punched nonwoven. Box and Behnken design in conjunction with 3D surface analysis
hasbeen used to study the effect of punch density, needle penetration depth and stroke frequency, considering the percentage
of binder fibres in the overall structure on thickness, tenacity, air permeability and filtration efficiency of the filter. In this
work, all the above properties are explained in the light of the considered structural index āpercentage of binder fibresā. It is
observed that the percentage of binder fibres increases with the increase of all three considered punching parameters. The
thickness and tenacity are found to be decreased and increased respectively, with the increase of binder fibre percentage.
The air permeability initially decreases and then increases with the increase in the percentage of binder fibres, whereas the
filtration efficiency showsthe opposite trend
Filtration performance of needle-punched nonwoven air filter media through dyeing process
417-423Viscose fibre has been dyed with various dye concentrations and the needle-punched nonwoven fabrics are prepared
using the dyed fibre, keeping machine parameters the same. The physical properties, such as tenacity & bursting strength,
and functional performance properties, such as mean flow pore size, filtration efficiency & pressure drop, are measured. It is
found that the dyeing plays a big role in altering the overall performance of the needle-punched nonwoven. The tenacity of
the needle-punched nonwoven fabric is reduced as dye concentration is increased. Filtration efficiency is measured for three
different sizes of particles, namely 3Ī¼m, 5Ī¼m, and 10Ī¼m. For all three cases, the filtration efficiency is increased initially till
3% dye concentration and beyond that it is reduced