Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Laboratory experimental studies were carried out to investigate the factors influencing the deposition of aerosols ranging in size from 1 nm to 10 [mu]m in the human nasal, oral, pharyngeal and laryngeal airways. These experimental studies were performed in replicate upper airway physical models and in human volunteer subjects. New replicate models of the oral passage of an infant, the oral passage of an adult at two openings and the combined nasal and oral airways of an adult were constructed during the period, adding to the existing models of adult, child and infant nasal and oral airways models. Deposition studies in the adult oral and adult nasal models were performed under simulated cyclic flow conditions with 1 nm particles to compare with previously measured constant flow studies. Similar studies with inertial particles (1--10 [mu]m diameter) were performed with the adult nasal model; in both instances, results with cyclic flow were similar to constant flow results using a simple average flow rate based on inspiratory volume and time of inspiration. Human subject studies were performed with particle sizes 5--20 nm for nasal inspiration; preliminary analysis shows good agreement with model studies at several representative flow rates. Nasal inspiratory inertial deposition of 1--4 [mu]m diameter particles was measured in several adults as a function of airway dimensions; dimensional changes of the valve area by decongestion did not produce concomitant deposition changes.
Regional Aerosol Deposition in Human Upper Airways. Progress Report, March 1, 1992--February 28, 1993
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Laboratory experimental studies were carried out to investigate the factors influencing the deposition of aerosols ranging in size from 1 nm to 10 [mu]m in the human nasal, oral, pharyngeal and laryngeal airways. These experimental studies were performed in replicate upper airway physical models and in human volunteer subjects. New replicate models of the oral passage of an infant, the oral passage of an adult at two openings and the combined nasal and oral airways of an adult were constructed during the period, adding to the existing models of adult, child and infant nasal and oral airways models. Deposition studies in the adult oral and adult nasal models were performed under simulated cyclic flow conditions with 1 nm particles to compare with previously measured constant flow studies. Similar studies with inertial particles (1--10 [mu]m diameter) were performed with the adult nasal model; in both instances, results with cyclic flow were similar to constant flow results using a simple average flow rate based on inspiratory volume and time of inspiration. Human subject studies were performed with particle sizes 5--20 nm for nasal inspiration; preliminary analysis shows good agreement with model studies at several representative flow rates. Nasal inspiratory inertial deposition of 1--4 [mu]m diameter particles was measured in several adults as a function of airway dimensions; dimensional changes of the valve area by decongestion did not produce concomitant deposition changes.
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Laboratory experimental studies were carried out to investigate the factors influencing the deposition of aerosols ranging in size from 1 nm to 10 [mu]m in the human nasal, oral, pharyngeal and laryngeal airways. These experimental studies were performed in replicate upper airway physical models and in human volunteer subjects. New replicate models of the oral passage of an infant, the oral passage of an adult at two openings and the combined nasal and oral airways of an adult were constructed during the period, adding to the existing models of adult, child and infant nasal and oral airways models. Deposition studies in the adult oral and adult nasal models were performed under simulated cyclic flow conditions with 1 nm particles to compare with previously measured constant flow studies. Similar studies with inertial particles (1--10 [mu]m diameter) were performed with the adult nasal model; in both instances, results with cyclic flow were similar to constant flow results using a simple average flow rate based on inspiratory volume and time of inspiration. Human subject studies were performed with particle sizes 5--20 nm for nasal inspiration; preliminary analysis shows good agreement with model studies at several representative flow rates. Nasal inspiratory inertial deposition of 1--4 [mu]m diameter particles was measured in several adults as a function of airway dimensions; dimensional changes of the valve area by decongestion did not produce concomitant deposition changes.
Energy Research Abstracts
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 654
Book Description
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 654
Book Description
ปัจจัยที่มีผลกระทบต่อการสืบสวนจับกุมคดีอุกฉกรรจ์
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Regional Aerosol Deposition in Human Upper Airways
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Laboratory experimental studies were carried out to investigate the factors influencing the deposition of aerosols ranging in size from 1 nm to 10 [mu]m in the human nasal, oral, pharyngeal and laryngeal airways. These experimental studies were performed in replicate upper airway physical models and in human volunteer subjects. New replicate models of the oral passage of an infant, the oral passage of an adult at two openings and the combined nasal and oral airways of an adult were constructed during the period, adding to the existing models of adult, child and infant nasal and oral airways models. Deposition studies in the adult oral and adult nasal models were performed under simulated cyclic flow conditions with 1 nm particles to compare with previously measured constant flow studies. Similar studies with inertial particles (1--10 [mu]m diameter) were performed with the adult nasal model; in both instances, results with cyclic flow were similar to constant flow results using a simple average flow rate based on inspiratory volume and time of inspiration. Human subject studies were performed with particle sizes 5--20 nm for nasal inspiration; preliminary analysis shows good agreement with model studies at several representative flow rates. Nasal inspiratory inertial deposition of 1--4 [mu]m diameter particles was measured in several adults as a function of airway dimensions; dimensional changes of the valve area by decongestion did not produce concomitant deposition changes.
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Laboratory experimental studies were carried out to investigate the factors influencing the deposition of aerosols ranging in size from 1 nm to 10 [mu]m in the human nasal, oral, pharyngeal and laryngeal airways. These experimental studies were performed in replicate upper airway physical models and in human volunteer subjects. New replicate models of the oral passage of an infant, the oral passage of an adult at two openings and the combined nasal and oral airways of an adult were constructed during the period, adding to the existing models of adult, child and infant nasal and oral airways models. Deposition studies in the adult oral and adult nasal models were performed under simulated cyclic flow conditions with 1 nm particles to compare with previously measured constant flow studies. Similar studies with inertial particles (1--10 [mu]m diameter) were performed with the adult nasal model; in both instances, results with cyclic flow were similar to constant flow results using a simple average flow rate based on inspiratory volume and time of inspiration. Human subject studies were performed with particle sizes 5--20 nm for nasal inspiration; preliminary analysis shows good agreement with model studies at several representative flow rates. Nasal inspiratory inertial deposition of 1--4 [mu]m diameter particles was measured in several adults as a function of airway dimensions; dimensional changes of the valve area by decongestion did not produce concomitant deposition changes.
Government Reports Annual Index
Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1828
Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1828
Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 924
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 924
Book Description
Toxicological Profile for Asbestos (Update)
Author: G. Douglas Hanley
Publisher: DIANE Publishing
ISBN: 1437930719
Category : Health & Fitness
Languages : en
Pages : 441
Book Description
This is a print on demand edition of a hard to find publication. Asbestos is a group of 6 different fibrous minerals that occur naturally in the environment. All forms of asbestos are hazardous, and all can cause cancer. This profile includes: (1) The exam¿n. and interpretation of toxicologic info. and epidemiological eval¿s. on asbestos to ascertain the levels of human exposure for the substance and its health effects; (2) A determination of whether adequate info. on the health effects of asbestos is available or in the process of development to determine levels of exposure that present a significant risk to human health; and (3) Where appropriate, identification of toxicologic testing needed to identify the types or levels of exposure that may present significant risk of adverse health effects in humans. Charts and tables.
Publisher: DIANE Publishing
ISBN: 1437930719
Category : Health & Fitness
Languages : en
Pages : 441
Book Description
This is a print on demand edition of a hard to find publication. Asbestos is a group of 6 different fibrous minerals that occur naturally in the environment. All forms of asbestos are hazardous, and all can cause cancer. This profile includes: (1) The exam¿n. and interpretation of toxicologic info. and epidemiological eval¿s. on asbestos to ascertain the levels of human exposure for the substance and its health effects; (2) A determination of whether adequate info. on the health effects of asbestos is available or in the process of development to determine levels of exposure that present a significant risk to human health; and (3) Where appropriate, identification of toxicologic testing needed to identify the types or levels of exposure that may present significant risk of adverse health effects in humans. Charts and tables.
Toxicological Profile for Polycyclic Aromatic Hydrocarbons
Author:
Publisher:
ISBN:
Category : Polycyclic aromatic hydrocarbons
Languages : en
Pages : 500
Book Description
Publisher:
ISBN:
Category : Polycyclic aromatic hydrocarbons
Languages : en
Pages : 500
Book Description
Nanoparticles in the Lung
Author: Akira Tsuda
Publisher: CRC Press
ISBN: 1439892806
Category : Medical
Languages : en
Pages : 403
Book Description
Nanoparticles have a physical dimension comparable to the size of molecular structures on the cell surface. Therefore, nanoparticles, compared to larger (e.g., micrometer) particles, are considered to behave differently when they interact with cells. Nanoparticles in the Lung: Environmental Exposure and Drug Delivery provides a better understanding
Publisher: CRC Press
ISBN: 1439892806
Category : Medical
Languages : en
Pages : 403
Book Description
Nanoparticles have a physical dimension comparable to the size of molecular structures on the cell surface. Therefore, nanoparticles, compared to larger (e.g., micrometer) particles, are considered to behave differently when they interact with cells. Nanoparticles in the Lung: Environmental Exposure and Drug Delivery provides a better understanding
The Regional Impacts of Climate Change
Author: Intergovernmental Panel on Climate Change. Working Group II.
Publisher: Cambridge University Press
ISBN: 9780521634557
Category : Science
Languages : en
Pages : 532
Book Description
Cambridge, UK : Cambridge University Press, 1998.
Publisher: Cambridge University Press
ISBN: 9780521634557
Category : Science
Languages : en
Pages : 532
Book Description
Cambridge, UK : Cambridge University Press, 1998.