Do transvascular forces in isolated lobe preparations equilibrate?

1989 ◽  
Vol 67 (2) ◽  
pp. 628-635 ◽  
Author(s):  
B. J. Hancock ◽  
M. Hoppensack ◽  
L. Oppenheimer
Keyword(s):  
Weight Loss ◽  
Weight Gain ◽  
Colloid Osmotic Pressure ◽  
Transient Method ◽  
Constant Weight ◽  
Transient Experiments ◽  
Balance Of Forces ◽  
The Stability ◽  
The Relationship ◽  
Additional Lobes

We used the stepwise pressure elevation technique to study the relationship between rate of constant weight gain (Qf) and microvascular pressure (Pc) in eight isolated canine left lower lobes. The slope of this relationship, which is assumed to represent lobar conductance to filtration (Kf) was 0.0022 +/- 0.003 ml.min-1.cmH2O-1.g dry wt-1. The intercept when Qf = 0, Pcrit, commonly interpreted as the Pc at which the balance of forces across the microvasculature is overwhelmed, was 9.53 +/- 1.18 cmH2O, a lower Pc than commonly used in weight transient experiments. Consequently, at Pc greater than 9.53 cmH2O, isogravimetric conditions were never achieved. In 12 additional experiments, the perfusate's colloid osmotic pressure (II) was increased from 12 to 37 mmHg with albumin. On average, Pcrit increased from 12.2 to 23 cmH2O. Using the changes in Pcrit and II, we estimated the microvascular drag reflection coefficient for albumin (sigma d) to be 0.67. After the addition of albumin, Pc less than Pcrit induced constant weight loss along the same Qf-to-Pc relationship. To control for time, five additional lobes were observed at constant Pc for 100–180 min. Slight acceleration of the rate of weight gain occurred after they increased their weight by 30–40%. The low Kf and high sigma d, as well as the stability of the preparation, suggest a well-preserved microvasculature. Qf at Pc between 12 and 24 cmH2O did not influence measurements of Kf using the weight transient method. The low Pcrit may reflect obliteration of lymphatic channels.

scholarly journals Dietary Patterns and Gestational Weight Gain and Postpartum Weight Loss: A NESR Systematic Review

2021 ◽  
Vol 5 (Supplement_2) ◽  
pp. 803-803
Author(s):  
Ramkripa Raghavan ◽  
Sharon M Donovan ◽  
Kathryn Dewey ◽  
Rachel Novotny ◽  
Jamie Stang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Weight Loss ◽  
Weight Gain ◽  
Gestational Weight Gain ◽  
Dietary Patterns ◽  
Dietary Guidelines ◽  
Processed Meat ◽  
Gestational Weight ◽  
Postpartum Weight ◽  
The Relationship

Abstract Objectives To inform the 2020–2025 Dietary Guidelines for Americans, USDA and HHS identified important public health questions to be examined by the 2020 Dietary Guidelines Advisory Committee. The Committee conducted 2 systematic reviews with support from USDA's Nutrition Evidence Systematic Review (NESR) team to answer the following questions: What is the relationship between dietary patterns (DP) consumed during 1) pregnancy and gestational weight gain (GWG)?, and 2) lactation and postpartum weight loss (PPWL)? Methods The Committee developed protocols that described how they would use NESR's systematic review methodology to examine the systematic review questions. NESR conducted a literature search and dual-screened the results using pre-defined inclusion and exclusion criteria to identify articles published between Jan 2000 and Nov 2019. NESR extracted data and assessed risk of bias of included studies. The Committee synthesized the evidence, developed conclusion statements, and graded the strength of the evidence underlying the conclusion statements. Results Twenty-six articles were included in the GWG review and 1 article in the PPWL review. The GWG review included 5 RCTs and 21 prospective cohort studies. Two RCTs showed that a “beneficial” DP was associated with lower GWG. Thirteen of the 20 observational studies showed an association between DP and GWG. Although the DPs examined were characterized by different combinations of foods and beverages, the patterns consistently associated with lower GWG were higher in vegetables, fruits, nuts, legumes, and fish and lower in added sugars and red and processed meats. The PPWL review included only one RCT, which was limited by high attrition, issues with implementing the intervention, and lack of blinding. Conclusions Limited evidence suggests that certain DPs during pregnancy are associated with a lower risk of excessive GWG. These patterns are higher in vegetables, fruits, nuts, legumes, and fish, and lower in added sugar, and red and processed meat (Grade: Limited). Insufficient evidence is available to determine the relationship between DPs during lactation and PPWL (Grade: Grade Not Assignable). Funding Sources USDA, Food and Nutrition Service, Center for Nutrition Policy and Promotion.

scholarly journals DESCRIPTION OF CHANGES IN INCREASED BODY WEIGHT IN KB PILL ACCEPTOR IN KELORARUM VILLAGE, TIKUNG SUBDISTRICT, LAMONGAN REGENCY

2020 ◽  
Vol 1 (2) ◽  
pp. 120
Author(s):  
Amelia Mardhika ◽  
Nur Jayadi
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Weight Gain ◽  
Birth Control ◽  
Small Proportion ◽  
Hormonal Contraception ◽  
Sampling Technique ◽  
Constant Weight ◽  
Consecutive Sampling ◽  
Fixed Weight

Introduction: Hormonal contraception is one method that can be used to prevent pregnancy and plan a pregnancy. KB pills are an option because they are easy and inexpensive, but hormonal birth control has the effect of increasing body weight. The purpose of this study was to determine the description of changes in birth control acceptors' pill in Kelorarum Village, Tikung Subdistrict, Lamongan Regency. Methods: The design in this study is descriptive. The sampling technique used was consecutive sampling with a sample of 25 people collecting data with checklists, the collected data was tabulated and presented in the form of frequency tables and narratives. Results: The results in this study were acceptors who experienced changes in body weight mostly increased by 56%, acceptors with a fixed weight of 24%, while acceptors who experienced weight loss were 20%. From the original body weight. The conclusion in this study is that most acceptors experience changes in body weight. Conclusion: Based on the results of the study, it was found that most KB pill acceptors experienced changes in weight gain, and a small proportion of pill KB acceptors experienced a constant weight and weight loss.

Weight gain causes weight loss

Nature ◽  
2001 ◽  
Author(s):  
John Whitfield
Keyword(s):  
Weight Loss ◽  
Weight Gain

An Experimental Investigation on Thermal Conductivity and Viscosity of Graphene doped CNTs /TiO2 Nanofluid

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
A.M. Zetty Akhtar ◽  
M.M. Rahman ◽  
K. Kadirgama ◽  
M.A. Maleque
Keyword(s):  
Thermal Conductivity ◽  
Zeta Potential ◽  
Base Fluid ◽  
Minimum Quantity Lubrication ◽  
Cutting Fluid ◽  
Cutting Zone ◽  
Observation Method ◽  
The Stability ◽  
The Relationship ◽  
Zeta Potential Analysis

This paper presents the findings of the stability, thermal conductivity and viscosity of CNTs (doped with 10 wt% graphene)- TiO2 hybrid nanofluids under various concentrations. While the usage of cutting fluid in machining operation is necessary for removing the heat generated at the cutting zone, the excessive use of it could lead to environmental and health issue to the operators. Therefore, the minimum quantity lubrication (MQL) to replace the conventional flooding was introduced. The MQL method minimises the usage of cutting fluid as a step to achieve a cleaner environment and sustainable machining. However, the low thermal conductivity of the base fluid in the MQL system caused the insufficient removal of heat generated in the cutting zone. Addition of nanoparticles to the base fluid was then introduced to enhance the performance of cutting fluids. The ethylene glycol used as the base fluid, titanium dioxide (TiO2) and carbon nanotubes (CNTs) nanoparticle mixed to produce nanofluids with concentrations of 0.02 to 0.1 wt.% with an interval of 0.02 wt%. The mixing ratio of TiO2: CNTs was 90:10 and ratio of SDBS (surfactant): CNTs was 10:1. The stability of nanofluid checked using observation method and zeta potential analysis. The thermal conductivity and viscosity of suspension were measured at a temperature range between 30˚C to 70˚C (with increment of 10˚C) to determine the relationship between concentration and temperature on nanofluid’s thermal physical properties. Based on the results obtained, zeta potential value for nanofluid range from -50 to -70 mV indicates a good stability of the suspension. Thermal conductivity of nanofluid increases as an increase of temperature and enhancement ratio is within the range of 1.51 to 4.53 compared to the base fluid. Meanwhile, the viscosity of nanofluid shows decrements with an increase of the temperature remarks significant advantage in pumping power. The developed nanofluid in this study found to be stable with enhanced thermal conductivity and decrease in viscosity, which at once make it possible to be use as nanolubricant in machining operation.

A FORECAST OF PRODUCTIVE LONGEVITY OF HOLSTEIN COWS BY INDIRECT SIGNS

2020 ◽  
Author(s):  
З.С. САНОВА
Keyword(s):  
Correlation Coefficient ◽  
Aging Process ◽  
Direct Relationship ◽  
Stability Index ◽  
Age At First Calving ◽  
Group I ◽  
Predicted Values ◽  
The Stability ◽  
Relationship Of ◽  
The Relationship

В статье представлены материалы о взаимосвязи продолжительности продуктивного использования коров с характеристикой устойчивости к деградации, с возрастом отела и удоем. В исследованной, разнородной по происхождению, группе животных для прогноза продуктивного периода коров, обусловленного устойчивостью к деградации и возрастом первого отела, пригодно уравнение регрессии, аргументами в котором являются индекс устойчивости, возраст первого отела в первой и второй степенях. Коэффициент корреляции межу предсказанными значениями продуктивного периода и его фактическими величинами в I группе составляет 0,502, во II - 0,604. При этом крайние варианты прогнозируются со статистическими ошибками 5 мес при оценке индекса устойчивости по 2 лактациям и 4,1 мес по 3, а средние варианты, соответственно, 1,6 и 1,51 мес. Индекс устойчивости к процессу старения является важной характеристикой биологических особенностей коров, определяющий их продуктивное долголетие. Его оценка по первым 2 и 3 лактациям имеет прямолинейную связь с продуктивным периодом (r=0,4109 и r=0,5270), соответственно. Зависимость продуктивного периода от возраста первого отела криволинейная — с увеличением возраста первого отела сокращается срок продуктивного использования, при возрасте первого отела более 1400 дней срок продуктивного использования колеблется от 1,33 до 1,41 лактации. Коэффициент корреляции между этими характеристиками коров составляет - 0,2164 в I и - 0,2620 во II группах. The article presents materials about the relationship of the duration of productive use of cows with the characteristic of resistance to degradation, with the age of calving and milk yield. In the studied group of animals, which is heterogeneous in origin, the regression equation is suitable for predicting the productive period of cows due to resistance to degradation and the age of the first calving, the arguments of which are the stability index, the age of the first calving in the first and second degrees. The correlation coefficient between the predicted values of the productive period and its actual values in group I is 0.502, in group II - 0.604. At the same time, the extreme variants are predicted with statistical errors of 5 months when evaluating the stability index for 2 lactations and 4.1 months for 3, and the average variants, respectively, are 1.6 and 1.51 months. The index of resistance to the aging process is an important characteristic of the biological characteristics of cows, which determines their productive longevity. Its estimate for the first 2 and 3 lactations has a direct relationship with the productive period (r=0.4109 and r=0.5270), respectively. The dependence of the productive period age at first calving curvilinear with increasing age at first calving reduces the time to productive use, while age at first calving of more than 1400 days, the period of productive use ranges from 1.33 to 1.41 lactation. The correlation coefficient between these characteristics of cows is-0.2164 in I and-0.2620 in II groups.

Substantiation the machine with a basket for the application of mineral fertilizers and other bulk materials with the upper arrangement of the feeding device

2019 ◽  
pp. 37-43
Author(s):  
Fesenko, H.
Keyword(s):  
Fat Body ◽  
Mineral Fertilizer ◽  
The Body ◽  
Mineral Fertilizers ◽  
Analytical Mechanics ◽  
Bulk Materials ◽  
The Stability ◽  
Working Bodies ◽  
The Relationship ◽  
Stable Flow

Purpose. Increasing the uniformity of distribution of mineral fertilizers and other bulk materials due to the stability of their feed from the body to the spreading working bodies using the top feeder. Methods. The following methods are used to achieve this aim: the method of comparing the differences between individual groups of fertilizers, the method of analyzing the properties of a new technical system, the method of functional inventiveness, and the methods of theoretical and analytical mechanics. Results. The traction body of the conveyor of the upper feed of the body fat body machine for mineral fertilizers and other bulk materials was substantiated and the relationship between the height of its scrapers and the distance between them was established, as well as the nature of the mineral fertilizer pressure on the curvilinear wall of the body. In addition, the design of the advanced body fertilizer spreader is justified, which ensures a stable flow of fertilizers from the body due to the improvement of the top feeder. Conclusions. Because of the conducted researches, the advantages of machines equipped with top feeder are found. They create the conditions for the forced feeding mineral fertilizers and other loose materials from the container to the distribution bodies, which is a prerequisite for their evenness on the surface. With this, the imperfection of known machines with the top feeder constrains their introduction into agricultural production. On this account, a more thoroughly constructed solution of the body feeder of the top feed is substantiated, in which the conveyor provides a stable supply of fertilizers from the body with reduced energy consumption during operation. Keywords: analysis, feed, upper device, conveyor, stability, fertilizers, flow ability, body.

Pound Wise and Penny Foolish? Weight Loss and The Dynamics of Health Care Spending

2011 ◽  
Vol 14 (2) ◽  
Author(s):  
Thomas G Koch
Keyword(s):  
Weight Loss ◽  
Cost Savings ◽  
Cost Effective ◽  
Economic Consequences ◽  
Health Care Spending ◽  
Order Of Magnitude ◽  
Dynamic Measures ◽  
The Cost ◽  
The Impact ◽  
The Relationship

Current estimates of obesity costs ignore the impact of future weight loss and gain, and may either over or underestimate economic consequences of weight loss. In light of this, I construct static and dynamic measures of medical costs associated with body mass index (BMI), to be balanced against the cost of one-time interventions. This study finds that ignoring the implications of weight loss and gain over time overstates the medical-cost savings of such interventions by an order of magnitude. When the relationship between spending and age is allowed to vary, weight-loss attempts appear to be cost-effective starting and ending with middle age. Some interventions recently proven to decrease weight may also be cost-effective.

Sign in / Sign up

Export Citation Format

Share Document