Mucous Cell Metaplasia in the Airways of Rats Exposed to Machining Fluids

1995 ◽  
Vol 28 (2) ◽  
pp. 274-282 ◽  
Author(s):  
T Gordon
Keyword(s):  
Mucous Cell ◽  
Machining Fluids

Mucous Cell Metaplasia in the Airways of Rats Exposed to Machining Fluids

1995 ◽  
Vol 28 (2) ◽  
pp. 274-282
Author(s):  
TERRY GORDON ◽  
JACK R. HARKEMA
Keyword(s):  
Mucous Cell ◽  
Machining Fluids

120. Factors Affecting Microbial Levels in the Air and Bulk Machining Fluids

1999 ◽  
Author(s):  
A. Virji ◽  
D. Kriebel ◽  
S. Woskie ◽  
S. Sama
Keyword(s):  
Factors Affecting ◽  
Machining Fluids

Chemically Assisted Machining of Ceramics

1994 ◽  
Vol 116 (3) ◽  
pp. 423-429 ◽  
Author(s):  
J. C. Wang ◽  
S. M. Hsu
Keyword(s):  
Material Removal ◽  
Removal Rate ◽  
High Hardness ◽  
Chemical Compounds ◽  
Surface Damage ◽  
Diamond Wheel ◽  
Halogenated Hydrocarbons ◽  
Ceramic Machining ◽  
Machining Of Ceramics ◽  
Machining Fluids

Ceramics are hard and brittle. Machining such materials is time-consuming, difficult, and expensive. Current machining technology requires stiff machine, high hardness tools, and small material removal rates to minimize surface damage. This study demonstrates the feasibility of a novel ceramic machining concept that utilizes chemical reactions at the tool-workpiece interface to reduce the stress and minimize the surface damage. A series of cutting tests using a diamond wheel on silicon nitride with different chemical compounds has been performed. The results demonstrate that by using different chemistries, the material removal rate and the surface finish of the machined ceramic can be significantly altered. Some halogenated hydrocarbons show a significant improvement over some commercial machining fluids currently in use.

scholarly journals Role for Mucin-5AC in Upper and Lower Airway Pathogenesis in Mice

2021 ◽  
pp. 019262332110044
Author(s):  
Hye-Youn Cho ◽  
Soojung Park ◽  
Laura Miller ◽  
Huei-Chen Lee ◽  
Robert Langenbach ◽  
...  
Keyword(s):  
Periodic Acid ◽  
Mucous Cell ◽  
Ozone Exposure ◽  
Lower Airway ◽  
Periodic Acid Schiff ◽  
Nasal Airways ◽  
Airway Injury ◽  
Syncytial Virus ◽  
Syncytia Formation ◽  
Injury Protection

Mucin-5AC (MUC5AC) is a major secreted mucin in pathogenic airways. To determine its role in mucus-related airway disorders, Muc5ac-deficient ( Muc5ac−/−) and wild-type ( Muc5ac+/+) mice were compared in bleomycin-induced pulmonary fibrosis, respiratory syncytial virus (RSV) disease, and ozone toxicity. Significantly greater inflammation and fibrosis by bleomycin were developed in Muc5ac−/− lungs compared to Muc5ac+/+ lungs. More severe mucous cell metaplasia in fibrotic Muc5ac−/− lungs coincided with bronchial Muc2, Muc4, and Muc5b overexpression. Airway RSV replication was higher in Muc5ac−/− than in Muc5ac+/+ during early infection. RSV-caused pulmonary epithelial death, bronchial smooth muscle thickening, and syncytia formation were more severe in Muc5ac−/− compared to Muc5ac+/+. Nasal septal damage and subepithelial mucoserous gland enrichment by RSV were greater in Muc5ac−/− than in Muc5ac+/+. Ozone exposure developed more severe nasal airway injury accompanying submucosal gland hyperplasia and pulmonary proliferation in Muc5ac−/− than in Muc5ac+/+. Ozone caused periodic acid-Schiff-positive secretion only in Muc5ac−/− nasal airways. Lung E-cadherin level was relatively lower in Muc5ac−/− than in Muc5ac+/+ basally and after bleomycin, RSV, and ozone exposure. Results indicate that MUC5AC is an essential mucosal component in acute phase airway injury protection. Subepithelial gland hyperplasia and adaptive increase of other epithelial mucins may compensate airway defense in Muc5ac−/− mice.

scholarly journals Cytological Characteristics of Mucose Cell and Vaginal Temperature and pH During Estrous Cycle in Local Sheep

2017 ◽  
Vol 19 (1) ◽  
pp. 21 ◽  
Author(s):  
Siti Darodjah Rasad ◽  
Rangga Setiawan
Keyword(s):  
Estrous Cycle ◽  
Mucous Cell ◽  
Pathogenic Microorganisms ◽  
Superficial Cell ◽  
Cell Temperature ◽  
Vaginal Epithelial Cells ◽  
Vaginal Swabs ◽  
Cytological Characteristics ◽  
Ph Conditions ◽  
Vaginal Temperature

Aim of this study was to examine the characteristics cytology of mucous cell-,temperature- and pH vagina during estrous cycle in local sheep.  31local sheep were synchronized with vaginal sponge consist of 20  mg  progesterone hormone before carried out observations of cytology of cells from the vaginal mucose through vaginal swabs, temperature and pH of the vagina.  Vaginal swabs were collected daily at 7 am for a weeks.Vaginal temperature and pH measurement is carried out twice a day, at 07.00 am and 15.00 pm for a weeks after vaginal swabs. Smears of the swab were then prepared on glass slide and they were stained with Giemsa.  Vaginal epithelial cells; Parabasal, intermediate and superficial cells were counted and their percentages during pro-estrous, estrous and di-estrous were determined. Di-estrous was characterized by the absent of superficial cells in the epithelial vagina. Pro-estrous was characterized by the increasing progressively of intermediate/superficial cells in epithelial vagina, whereas estrous was characterized by the presence of superficial/cornification cells in most epithelial vagina. Based on the dominance of superficial cell, the number of sheep identified as estrous is highest on third day, with 52%.  Observation on vaginal temperature also resulting that the highest temperature values obtained on the third day of 39,08±0.28°C.  It could be effected of the vaginal pH during the observation. Underthe influence ofestrogen, the epithelial vaginalcellssynthesizeand accumulateglycogenin large quantitiesdepositedin the lumen ofvagina. Vaginal bacteriametabolizethe glycogenformlactic acid, which causesvaginal pHis low.The pH conditions prevent from pathogenic microorganisms and fungi. Increased estrogenal so cause cell proliferation through the thickening of the epithelium lining of the vagina so that the cells differentiate.Increasing of glycogenin the superficial cells, and  ceratin cells found in the cytoplasm of cells, as well as acidic pH in the lumen vagina causing changes in the chemical composition of each cell (Zaid, 2011).It can be concluded that during estrous phase, cytology of  vaginal mucose cell is dominated by superficial cell and vaginal temperature is increasing as well as pH of vagina.

scholarly journals IFN-γ, But Not Fas, Mediates Reduction of Allergen-Induced Mucous Cell Metaplasia by Inducing Apoptosis

2002 ◽  
Vol 168 (9) ◽  
pp. 4764-4771 ◽  
Author(s):  
Zha O-Quan Shi ◽  
Mark J. Fischer ◽  
George T. De Sanctis ◽  
Mark R. Schuyler ◽  
Yohannes Tesfaigzi
Keyword(s):  
Mucous Cell ◽  
Ifn Γ

Studies on the mechanisms of mucous cell depletion in experimental colitis

1989 ◽  
Vol 159 (1) ◽  
pp. 75-85 ◽  
Author(s):  
Safa M. Kaftan ◽  
Nicholas A. Wright
Keyword(s):  
Mucous Cell ◽  
Experimental Colitis ◽  
Cell Depletion
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