Literatura académica sobre el tema "WC.840"

Based on surface protection problems of the steel part of the landing gear, wear-resisting properties of tungsten carbide-cobalt (WC-Co) particles reinforced epoxy (WRE) coatings were investigated in this paper. The curing process of WRE coating was analyzed by DSC, TG and IR. The wear performance under different rotational speed WRE coating was studied respectively. The specific wear rates of the WRE coating at 560 rpm and 840 rpm are 6.04 ×10−4mm3N−1m−1and 9.55 ×10−4mm3N−1m−1respectively, about only 60% of that of the uncoated sample. Thus, this could be summarized that WRE coating had a good wear resistance.

Based on surface protection problems of the steel part of the landing gear, wear-resisting properties of tungsten carbide-cobalt (WC-Co) particles reinforced epoxy (WRE) coatings were investigated in this paper. The curing process of WRE coating was analyzed by DSC, TG and IR. The wear performance under different rotational speed WRE coating was studied respectively. The specific wear rates of the WRE coating at 560 rpm and 840 rpm are 6.04 ×10−4 mm3N−1 m−1and 9.55 ×10−4 mm3N−1 m−1 respectively, about only 60% of that of the uncoated sample. Thus, this could be summarized that WRE coating had a good wear resistance.

Abstract Objectives Sodium intake has been widely studied for its role in cardiovascular disease (CVD) and blood pressure (BP) changes. Some studies have suggested that sodium intake is associated with an increased risk of obesity. Although BMI is a common measure of obesity, waist circumference (WC) may serve as a better predictor of increased obesity-related CVD risk. The objective of this study was to examine the association of measures of body fat distribution including body mass index (BMI), WC, waist to hip ratio (WHP), and waist to height ratio (WHT) with sodium intake and BP in older adults. Methods One hundred twenty-eight adults aged 65–80 were included in this cross-sectional study. Dietary data was collected through a food frequency questionnaire (110 food items). Anthropometric and BP measurements were also collected. Multiple linear regression analyses were conducted to examine the association of obesity measures with sodium intake and BP levels. One-way ANOVA was used to determine differences in sodium and BP readings between BMI categories (Normal: 18.5–24.9; Overweight: 25.0–29.9 and Obese: 30.0 and above). Results WC and WHT were both significantly associated with sodium intake after controlling for age, gender, physical activity, and total calorie intake. Obese individuals consumed significantly more sodium than individuals with normal weight (2834 ± 974 mg in obese individuals; 2172 ± 840 mg in normal weight individuals; P = 0.044). BMI, WC, WHP, and WHT were significantly associated with systolic and diastolic BP. Mean systolic BP was significantly different between individuals with normal BMI and obese BMI (126 ± 16.5 mmHg in normal BMI; 139.7 ± 22.9 mmHg in obese BMI; P = 0.047). The mean diastolic BP showed a statistically significant difference between the normal BMI and overweight individuals (70.9 ± 10.4 mmHg in normal BMI; 79.3 ± 15.2 mmHg in overweight; P = 0.036) but not in obese individuals. Conclusions Higher sodium consumption was significantly related with higher abdominal body fat mass as measured by WC and WHT in older adults. Higher BMI, WC, WHP, and WHT were also associated with systolic and diastolic BP levels. Our findings suggest that excessive sodium intake is an independent risk factor for obesity in older adults. Funding Sources None.

Background Body fat distribution influences the risk of cardio-metabolic disease in people with overweight. This study was aimed at identifying the anthropometric parameters more strongly associated with the majority of cardio-metabolic risk factors. Methods This study included 1214 subjects (840 women), with a body-mass-index (BMI) ≥ 25 Kg/m2, aged 39.2 ± 13 years. Fasting blood glucose (FBG), triglycerides (TG), total, HDL- and LDL-cholesterol, uric acid, vitamin D, high-sensitive C-reactive protein (hs-CRP), white blood cells (WBC), platelets, insulin and insulin resistance (HOMA-IR), systolic (SBP) and diastolic blood pressure (DBP), smoking habit and snoring were evaluated as cardio-metabolic risk factors.We also included the Systematic COronary Risk Evaluation (SCORE) to estimate cardiovascular risk in our study population. BMI, waist circumference (WC), waist-to-height-ratio (WHtR) and neck circumference (NC) were evaluated as anthropometric parameters. Results All four anthropometric parameters were positively associated to SBP, DBP, TG, FBG, insulin, HOMA-IR, WBC, and snoring (p<0.001), and negatively associated with HDL-cholesterol (p<0.001). NC showed a positive association with LDL-cholesterol (β = 0.76; p = 0.01; 95% C.I. 0.19 to 1.32), while vitamin D was negatively associated to WC (β = -0.16; p<0.001; 95% C.I. -0.24 to -0.09), BMI (β = 0.42); p<0.001; 95% C.I. -0.56 to -0.28) and WHtR (β = -24.46; p<0.001; 95% C.I. -37 to -11.9). Hs-CRP was positively correlated with WC (β = 0.003; p = 0.003; 95% C.I. 0.001 to 0.006), BMI (β = 0.01; p = 0.02; 95% C.I. 0.001 to 0.012) and WHtR (β = 0.55; p = 0.01; 95% C.I. 0.14 to 0.96). SCORE was associated to NC (β = 0.15; 95% CI 0.12 to 0.18; p<0.001), BMI (β = -0.18; 95% CI -0.22 to 0.14; p<0.001) and WHtR (β = 7.56; 95% CI 5.30 to 9.82; p<0.001). Conclusions NC, combined with BMI and WC or WHtR could represent an essential tool for use in clinical practice to define the cardio-metabolic risk in individuals with excess body weight.

AIM: To study anthropometric, biochemical and hormonal characteristics of women aged 25-44 with different levels of thyroid- stimulating hormone, prolactin and leptin.MATERIALS AND METHODS: From a representative sample of the young population of the Oktyabrsky district of Novosibirsk aged 25-44 years (840 women), a group of women (n=655) was selected to study cardiometabolic and hormonal parameters. The design of the study was a cross-sectional, observational, single-centre study. All participants underwent determination of anthropometric parameters (weight, measurement of waist circumference (WC) and hips (HC), calculation of BMI), systolic and diastolic blood pressure (SBP, DBP), biochemical parameters (total cholesterol (TC), high-density lipoprotein cholesterol ( HDL-C), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), fasting plasma glucose (FPG), creatinine, calculation of glomerular filtration rate (GFR).Statistical processing was carried out using the SPSS-13 package.RESULTS: The study included 655 women, mean age 36.3±5.4 years, mean BMI 25.0±5.7 kg/m2. Young women showed direct associations of TSH with HC (r=0.115, p<0.05), TG (r=0.145, p<0.010) and inverse association with GFR (r=-0.129, p<0.05). PRL is inversely associated with HC (r=-0.109, p<0.05). Of all the studied hormones, leptin is most associated with anthropometric and biochemical parameters in young women. Thus, leptin is directly associated with WC (r=0.562, p<0.0001), HC (r=0.589, p<0.0001), WC/HC index (r=0.309, p<0.0001), BMI ( r=0.582, p<0.0001), as well as levels of SBP (r=0.293, p<0.0001), DBP (r=0.274, p<0.0001), TC (r=0.123, p=0.018), TG (r=0.234, p<0.0001), FPG (r=0.150, p=0.004), inversely related to HDL-C (r=-0.225, p<0.0001).CONCLUSION: The metabolic status of women aged 25-44 is associated with the level of TSH, leptin. It is advisable to determine TSH, leptin in young women with abdominal obesity for the purpose of dynamic monitoring and correction.

تم استخدام طريقة الرش الحراري باللهب لمعالجة الريش التوربينات المستخدمة بمحطات الطاقة الكهربائية وأنابيب النفط التي تعاني من تأكل خارجي ومن التشققات والتلف، حيث تم تحضير طلاء نيكل مقوى بمادتين الاولى كربيد التنكستن WC بمعدل ثابت (5%) والثانية معدن الكروم %Cr بنسب مختلفة %(0,2,4,6,8). كما تم تحضير عينات ذات شكل مربع بقطر 1cm من ريشة توربينية خارجة عن الخدمة بعد ان تم تقطيعها، وبعد ذلك تم خلط المساحيق ككل جيداً وتم اجراء الطلاء بجهاز الرش الحراري باللهب. وتم تلبيد العينات بالحرارة عند (1000°C) ولزمن ساعتين فقط. بعدها تم اجراء اختبار صلادة فيكرز والمسامية وقوة الالتصاق وتم اخذ صور للعينات من خلال المجهر الالكتروني الماسح مع زيادة نسب التدعيم ، كان تأثير نسب التدعيم طردياً مع كل من الصلادة وقوة التلاصق حيثُ كانت أعلى صلادة ( 840 كغم\مم2) ، وأعلى قوة تلاصق هي 46) ميجا باسكال) بتناسب طردي مع مادة التدعيم ، بينما أقل مسامية كانت (8٪) بتناسب عكسي مع مادة التدعيم, اما المجهر الالكتروني اعطى صور واضحة المعالم للعينات المطلية التي ظهر فيها مقدار التناسق البلوري والتشابك الميكانيكي، والذي بدوره اعطى نتائج مميزة ومشجعة، حيث وجد ان افضل نسبة تقوية (8%)، اذ يلاحظ التناسق السطحي والبلوري المتميز للمساحيق المرشوشة على قاعدة الطلاء.

For investigating the correlation with spectral CT imaging parameters and occult lymph nodes metastasis in sufferers with isolated lung adenocarcinoma. The clinic cases data of 352 sufferers with isolated lung adenocarcinoma from January 2019 to January 2022 were assembled. In line with whether the sufferers had occult lymph nodes metastasis, they were taken as a part in the metastasis group (n = 172) and the nonmetastasis group. All sufferers were scanned by spectral CT with a dual-phase contrast-enhanced method, and the recording of spectral CT imaging parameters in arteriovenous phase, iodine concentration (IC), water concentration (WC), the slope rate of the spectral HU curve (λHU), the normalized iodine concentration(NIC), the normalized water concentration(NWC), the normalized effective atomic number (Neff-Z)], and receiver operating characteristic (ROC) were employed to analyze the spectral CT imaging parameters of the arteriovenous phase. Evaluation of occult lymph nodes metastases in sufferers with isolated lung adenocarcinoma. The IC, NIC, λHU, and Neff-Z in the arteriovenous phase spectral CT imaging parameters of the metastasis group were obviously smaller than that of the nonmetastasis group, and the discrepancies were statistically obvious ( P < 0.05 ). The results of ROC curve analysis manifested that the area under the curve (AUC) of λHU, IC, NIC, and Neff-Z in the CT parameters of the arterial phase were 0. 840 (95%CI : 0. 796–0.883), 0.763 (95% CI : 0.708–0.818), 0.918 (95% CI : 0.888–0.948), 0.778 (95% CI : 0.731–0.826). The AUCs of λHU, IC, NIC, and Neff-Z in the venous phase spectral CT parameters were 0.909 (95% CI : 0.877–0.941), 0.837 (95% CI : 0.792–0.881), and 0.980 (95% CI : 0.968–0.968), respectively. 0.993), 0.792 (95% CI : 0.742∼0.842). Spectral CT imaging parameters have a certain value in evaluating occult lymph nodes metastasis in sufferers with isolated lung adenocarcinoma, which is helpful for doctors to judge the lymph nodes metastasis in sufferers with this disease before surgery.

Abstract Purpose This study was aimed to assess the effectiveness of Glucagon-like peptide 1 receptor agonists on pregnancy rate, menses, anthropometric and hormonal parameters in PCOS patients. Methods We conducted searches of the published literature in PubMed, EMBASE, Cochrane Library, Web of Science up to September 2022. Data from randomized controlled trials were obtained to assess the effects of GLP1RAs in PCOS women. Weighted mean difference, standardized mean difference, and risks ratio were employed for effect size estimation using a random-effects model. Results A total of 840 patients with 469 individuals in GLP1RAs group and 371 individuals in control group from 11 RCTs were included. GLP1RAs usage was associated with an improvement in natural pregnancy rate (RR: 1.72, 95% CI 1.22 to 2.43, P = 0.002, I2 = 0%) and menstrual regularity (SMD: 1.72, 95% CI 0.60 to 2.85, P < 0.001, I2 = 95.6%). There were no statistically significant differences in total pregnancy rate, IVF pregnancy rate between two groups, but total PR elevated in a short time after GLP1RAs as shown in subgroup analysis. Randomization to GLP1RAs treatment was associated with great improvement in HOMA-IR, BMI, WC, SHBG and a slight reduction in TT compared to control group. A decrease in TBF was seen in European population. GLP1RAs monotherapy was not superior to metformin when it came to fT, DHEAS, FAI. Conclusions Prescription of GLP1RAs improves natural pregnancy rate, menstrual cyclicity and insulin sensitivity, anthropometrics, hormonal indexes in PCOS women.

AbstractComprehensive screening for non-alcoholic fatty liver disease (NAFLD) may help prompt clinical management of fatty liver disease. A family history, especially of diabetes, has been little studied as a predictor for NAFLD. We characterized the cross-sectional relationship between a family history of type 2 diabetes (FHT2D) and NAFLD probability in 1185 diabetes-free Apulian (Southern-Italy) subjects aged > 20 years with overweight or obesity not receiving any drug or supplementation. Clinical data and routine biochemistry were analysed. NAFLD probability was defined using the fatty liver index (FLI). A first-degree FHT2D was assessed by interviewing subjects and assigning a score of 0, 1, or 2 if none, only one, or both parents were affected by type 2 diabetes mellitus (T2DM). Our study population featured most females (70.9%, N = 840), and 48.4% (N = 574) of the sample had first-degree FHT2D. After dividing the sample by a FHT2D, we found a higher BMI, Waist Circumference (WC), and diastolic blood pressure shared by FHT2D subjects; they also showed altered key markers of glucose homeostasis, higher triglyceride levels, and worse liver function. FLI scores were significantly lower in subjects without a first-degree FHT2D. After running logistic regression models, a FHT2D was significantly associated with the NAFLD probability, even adjusting for major confounders and stratifying by age (under and over 40 years of age). A FHT2D led to an almost twofold higher probability of NAFLD, regardless of confounding factors (OR 2.17, 95% CI 1.63 to 2.89). A first-degree FHT2D acts as an independent determinant of NAFLD in excess weight phenotypes, regardless of the age group (younger or older than 40 years). A NAFLD risk assessment within multidimensional screening might be useful in excess weight subjects reporting FHT2D even in the absence of diabetes.

L’échinococcose alvéolaire demeure une zoonose en expansion malgré l’amélioration des mesures sanitaires, le changement des habitudes alimentaires et la diminution des populations des catégories socio-économiques les plus à risque. La contamination de l’environnement par Echinococcus multilocularis, le parasite responsable de cette zoonose, et le risque d’infection pour l’homme dépendent de la distribution des fèces des carnivores hôtes définitifs du parasite. Cette étude visait à caractériser la contribution des renards, chiens et chats dans la contamination environnementale par E. multilocularis en zone d’endémie. La présence des œufs d’E. multilocularis a été confirmée plus significativement dans les fèces de renards. De plus, nos travaux ont démontré une hétérogénéité spatiale locale du risque d’exposition aux œufs d’E. multilocularis via les fèces de renards, ce qui représente un paramètre clé dans la transmission locale du parasite. Par ailleurs, l’étude de la contamination des sols de potagers par E. multilocularis laisse penser que les œufs du parasite pouvaient persister pendant au moins une année après la disparition des fèces porteuses du parasite. La contribution individuelle des renards dans la contamination de l’environnement par E. multilocularis a été explorée par l’identification de leurs fèces par génotypage à l’aide de marqueurs microsatellites. Parmi les renards infestés, nous avons mis en évidence quelques individus (35%) ayant déposé la majorité des fèces testées positives pour E. multilocularis (60%). Enfin, l’identification des profils génétiques EmsB des œufs d’E. multilocularis isolés des fèces des hôtes suggère une transmission du parasite des renards, alors considérés comme un réservoir local du parasite, vers les chiens et chats via la prédation d’une même population locale de rongeurs. L’ensemble du travail démontre le rôle majeur du cycle sylvatique entretenu par les renards dans le maintien du cycle syna nthropique du parasite. Il semble alors que les mesures de contrôle d’abondance d’E. multilocularis sur le terrain doivent nécessairement couvrir le territoire des renards super-propagateurs du parasite pour espérer interrompre le cycle local du parasite
Alveolar echinococcosis remains an expanding zoonosis despite improved sanitary measures, changing dietary habits and decreasing populations in the most at-risk socio-economic categories. Environmental contamination with Echinococcus multilocularis, the parasite responsible for this zoonosis, and the risk of infection for humans depend on the distribution of carnivore faeces, as definitive hosts of the parasite. This study aimed to characterise the contribution of foxes, dogs and cats to environmental contamination with E. multilocularis in endemic area. The presence of E. multilocularis eggs was confirmed most significantly in fox faeces. Furthermore, our studies demonstrated local spatial heterogeneity in the exposure risk to E. multilocularis eggs via fox faeces, which represents a key parameter in the local transmission of the parasite. In addition, investigation of soil contamination with E. multilocularis in vegetable gardens suggests that E. multilocularis eggs could persist for at least one year after the disappearance of faeces carrying the parasite. Individual contribution of foxes to environmental contamination with E. multilocularis was explored by genotyping their faeces with microsatellite markers. Among infested foxes, we identified a few individuals (35%) that deposited the majority of faeces tested positive for E. multilocularis (60%). Finally, the identification of EmsB genetic profiles of E. multilocularis eggs isolated from definitive host faeces suggests transmission of the parasite from foxes, then considered as a local reservoir, to dogs and cats via predation of the local rodent population. The whole study demonstrates the major role of the sylvatic cycle perpetuated by foxes in maintaining the synanthropic cycle of the parasite. It seems then measures to control E. multilocularis abundance in the field must necessarily cover the territory of fox individuals that are super-spreaders for the parasite in order to s ucceed in interrupting the local cycle of the parasite