Wyniki wyszukiwania - Biblioteka Nauki

1

Effect of thermomechanical modification of Scots pine (Pinus sylvestris L.) wood on machine sanding efficiency

100%

Gruszczyński D. , Szymanowski K.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

|

2022

|

tom No. 118

74--84

EN

Effect of thermomechanical modification of Scots pine (Pinus sylvestris L.) wood on machine sanding efficiency. The aim of this study was to investigate the effect of thermomechanical modification of pine wood (Pinus sylvestris L.) on the efficiency of machine sanding. For this purpose, pine wood samples (undensified and densified) were subjected to mechanical sanding. The effect of the modification on the mass loss in the sanding process was investigated and the quality of the obtained surface was examined. Roughness parameters Ra and Rz were used as criteria for the quality of the sanded surface. The study was carried out for three different grit sizes of sanding paper. It was found that the thermomechanical modification of Scots pine wood had a statistically significant effect on the mass loss during sanding and the roughness of the obtained surface. Wood samples subjected to thermomechanical compaction were characterised by lower susceptibility to sanding measured on the basis of weight loss and lower surface roughness.

PL

Wpływ termomechanicznej modyfikacji drewna sosny zwyczajnej (Pinus sylvestris L.) na wydajność szlifowania maszynowego. Celem pracy było zbadanie wpływu termomechanicznej modyfikacji drewna sosnowego (Pinus sylvestris L.) na wydajność szlifowania maszynowego. W tym celu próbki drewna sosny zwyczajnej (natywne oraz zagęszczane) poddano szlifowaniu mechanicznemu. Zbadano wpływ modyfikacji na ubytek masy w procesie szlifowania oraz zbadano jakość uzyskanej powierzchni. Jako kryteria jakości szlifowanej powierzchni przyjęto parametry chropowatości Ra i Rz. Badania przeprowadzono dla trzech różnych ziarnistości papieru szlifierskiego. Stwierdzono, że termomechaniczna modyfikacja drewna sosny zwyczajnej wpływa istotnie statystycznie na ubytek masy podczas szlifowania i chropowatość uzyskanej powierzchni. Próbki drewna poddane zagęszczaniu termomechanicznemu charakteryzowały się mniejszą podatnością na szlifowanie mierzoną na podstawie ubytku masy i niższą chropowatością powierzchni.

2

Wood decomposition by porodaedalea pini from different regions of Poland

100%

Szewczyk W.

Drewno : prace naukowe, doniesienia, komunikaty

|

2015

|

tom vol. 58, nr 194

127--134

EN

The results of studies on heartwood decomposition caused by Porodaedalea pini in pine, spruce and larch are presented. It was found that spruce wood was decomposed to the greatest extent, while pine and larch less so. No relationship was found between the geographical origin of the isolate and its wood decomposition capacity.

3

Physicochemical changes and weight loss during freezing, storage and thawing of food products - review of selected issues

100%

Ruciński A. , Stopińska W.

Modern Engineering

|

2019

|

tom 2

78--87

EN

The paper shows changes occurring during freezing, storage and thawing of food products. In particular, it refers to weight loss associated with moisture loss. The influence of the chosen freezing method and the type of packaging (or lack thereof) on the amount of water lost in the product is shown. Characteristics of the rate of moisture loss depending on the conditions of storage of products in cold storage chambers are described. The methods of preventing greater loss of moisture in stored products are indicated. The article also contains a short description of the product thawing methods and methods of preventing excessive moisture loss.

4

Foreign Body in the Gastrointestinal Tract Leading to Small Bowel Obstruction - Case Report and Literature Review

100%

Wnęk B. , łożyńska-Nelke A. , Karoń J.

Polish Journal of Surgery

|

2015

|

tom 86

|

nr 12

594-597

EN

The presence of a foreign body in the gastrointestinal tract constitutes a common pathology, considering surgical clinical practice. The management of the ingestion of a foreign body depends on many factors. The study presented a case of a 33-year-old female patient subjected to surgical treatment, due to deliberate swallowing of a balloon. The above-mentioned was the amateur equivalent of intragastric balloon insertion, inducing weight loss. This is a rare cause of a foreign body ingestion, seldomly found in literature data. The patient reported to the Emergency Department on the second day after ingestion with symptoms of mechanical subobstruction, and after initial diagnostics, was qualified for surgery. The postoperative period proved uneventful. The study illustrated the often unfavourable access to false data on the internet, which may stimulate towards the above-mentioned behaviour.

5

Primary Duodenal Carcinoma - Case Report

100%

Wesecki M. , Niemiec S. , Radziuk D. , Waniczek D. , Lorenc Z.

Polish Journal of Surgery

|

2015

|

tom 86

|

nr 11

540-543

EN

Duodenal carcinoma is a rare tumor of the gastrointestinal tract of an insidious and secretive course, often diagnosed during the advanced stage of the disease. The study presented a case of a female patient diagnosed with duodenal carcinoma, subjected to two-staged surgery. The initial surgical intervention consisted in the implementation of a gastrointestinal anastomosis, followed by radical surgery by means of Whipple's method performed after three years.

6

Serum Cystatin C in Relation to Fat Mass Loss After Bariatric Surgery"

88%

Śledziński T. , Proczko-Markuszewska M. , Kaska Ł. , Stefaniak T. , Świerczyński J.

Polish Journal of Surgery

|

2012

|

tom 84

|

nr 4

202-207

EN

Serum cystatin C concentration, generally accepted as renal function marker, is associated with cardiovascular risk and metabolic syndrome. Recent studies indicate that cystatin C increases in human obesity and that adipose tissue contributes to enhanced serum cystatin C concentration in obese subjects.The aim of the study was to assess whether a reduction in body and fat mass after bariatric surgery has any impact on serum cystatin C concentrations.Material and methods. Serum from 27 obese patients were tested before and 6 months after bariatric surgery. Twenty healthy subjects with normal body weight served as controls. Serum cystatin C concentrations were assayed by ELISA.Results. Serum cystatin C concentrations were significantly higher in obese patients compared with non-obese subjects. Decrease of body and fat mass after bariatric surgery resulted in improvement of several parameters associated with cardiovascular risk and metabolic syndrome, like serum lipids, blood pressure and insulin sensitivity. Surprisingly the mean postoperative serum cystatin C concentration was not significantly different from that before surgery. Serum creatinine and GFR also remained unchanged.Conclusion. The results presented here suggest that serum cystatin C concentration is not tightly associated with body and fat mass loss in obese patients after bariatric surgery.

7

Characterization and optimization study of Ficus exasperata extract as corrosion inhibitor for mild steel in seawater

88%

Oyewole O. , Aondoakaa E. , Abayomi T. S. , Ogundipe S. J. , Oshin T. A.

World Scientific News

|

2021

|

tom 151

78-94

EN

This study investigated the characterization of Ficus exasperata extract and the optimization of the process variables on inhibition of mild steel in seawater environment. Box Behnken Design was employed to examine the influence of three process variables: Temperature: 25-29 °C; Time: 3 – 6 days; Inhibitor concentration: 1-5 v/v. Phytochemical screening of the extract was done. The physicochemical constituents of the seawater were also determined. The experimental data was statistically determined and Scanning Electron Microscope (SEM) was used to characterize the mild steel. The result of the phytochemical screening of the Ficus exasperata plant extract (FEPE) showed the presence of contain inhibitive constituents: alkaloids, tannins, saponins, flavonoids and glycosides. The highest inhibition efficiency of 86.31% at a temperature of 29 ℃ for 6days at an inhibition concentration of 3v/v was observed from the experimental run. The optimal process levels of time: 5.74 days, temperature: 27.95 ℃ and inhibitor concentration: 2.90v/v, gave 87.52% as its inhibition efficiency. The result of the SEM from the optimal process level validated showed that more passive film was formed which can be attributed to the adsorption of the Ficus exasperata extract. It can be concluded that the Ficus exasperata was a good eco-friendly inhibitor.

8

The effect of increasing concentration of carbon dioxide in controlled atmosphere storage of plums cv. Wegierka Zwykla [Prunus domestica L.]. I. Firmness of plums

88%

Ben J. , Gaweda M.

Acta Physiologiae Plantarum

|

1992

|

tom 14

|

nr 3

9

Effects of walking training performed using continuous and interval methods on weight loss as effective strategies among postpartum women

75%

Zert M.

Baltic Journal of Health and Physical Activity. The Journal of Gdansk University of Physical Education and Sport

|

2019

|

tom 11

|

nr 1

10

Inhibitive tendency of zinc gluconate for aluminium alloy in sulphuric acid solution

75%

Sanni O. , Loto C. A. , Popoola A. P. I.

Polish Journal of Chemical Technology

|

2013

|

tom 15

|

nr 4

60-64

EN

The corrosion inhibition of aluminium alloy in 0.5M H2SO4 solution in the presence of zinc gluconate at 301 K was investigated using weight loss and an electrochemical method. Surface analysis of the aluminium alloy sample was reviewed by a high resolution scanning electron microscope equipped with energy dispersive spectroscopy (HRSEM/ EDS). The readings were taken after 48 h for 28 days while the concentration of the inhibitor was varied from 0.5 to 2.0% g/v with an interval of 0.5. The result of the investigation shows that zinc gluconate has a good corrosion inhibition effect for aluminium alloy in 0.5 molar sulphuric acid solution and its efficiency attains more than 67% at 1.5% g/v concentration of zinc gluconate at 301 K. The potentiodynamic polarization data showed that zinc gluconate acts as a mixed type corrosion inhibitor. The adsorption of zinc gluconate on aluminium alloy has been found to obey Freundlich adsorption isotherm at all the concentration of zinc gluconate studied. The results obtained from different methods are in good agreement.

11

Teoreticheskoe issledovanie vlijjanija parametrov poseva na poteri sakharnojj massy v processe otdelenija botvy sakharnojj svekly

75%

Boris N. , Strel'chuk A. , Grubiy V. , Tkachenko E.

Motrol. Motoryzacja i Energetyka Rolnictwa

|

2015

|

tom 17

|

nr 5

12

A Study on Improving Dyeability of Polyester Fabric Using Lipase Enzyme

75%

Kumar J. A. , Kumar M. S.

Autex Research Journal

|

2020

|

tom Vol. 20, no. 3

243--249

EN

Enzymatic hydrolysis on synthetic fibers enhances the hydrophilicity and solves the concerns regarding the environmental issues of textile industry. Lipase hydrolyses ester linkages in polyethylene terephthalate and produces polar hydroxyl and carboxylic groups. The study aims to identify and investigate the effect of enzyme treatment on weight loss and surface modification of polyester fabrics. Also the functional groups present before and after treatment and the effect of enzyme treatment on the improvement of dye uptake are studied. The test indicates that enzymatic process creates less surface damage, weight loss and improved moisture regain, dye uptake, and shear properties.

13

Inhibitive tendency of zinc gluconate for aluminium alloy in sulphuric acid solution

75%

Sanni O. , Loto C. A. , Popoola A. P. I.

Polish Journal of Chemical Technology

|

2013

|

tom Vol. 15, nr 4

60-64

EN

The corrosion inhibition of aluminium alloy in 0.5M H2SO4 solution in the presence of zinc gluconate at 301 K was investigated using weight loss and an electrochemical method. Surface analysis of the aluminium alloy sample was reviewed by a high resolution scanning electron microscope equipped with energy dispersive spectroscopy (HRSEM/ EDS). The readings were taken after 48 h for 28 days while the concentration of the inhibitor was varied from 0.5 to 2.0% g/v with an interval of 0.5. The result of the investigation shows that zinc gluconate has a good corrosion inhibition effect for aluminium alloy in 0.5 molar sulphuric acid solution and its efficiency attains more than 67% at 1.5% g/v concentration of zinc gluconate at 301 K. The potentiodynamic polarization data showed that zinc gluconate acts as a mixed type corrosion inhibitor. The adsorption of zinc gluconate on aluminium alloy has been found to obey Freundlich adsorption isotherm at all the concentration of zinc gluconate studied. The results obtained from different methods are in good agreement.

14

Rynek suplementów diety wspomagających odchudzanie

75%

Marciniak-Łukasiak K. , Żbikowska A. , Kowalska M. , Gocał-Rosińska M.

Postępy Techniki Przetwórstwa Spożywczego

|

2013

|

tom nr 2

57--60

PL

Celem artykułu jest przedstawienie wyników badań rynku suplementów diety wspomagających odchudzanie, występujących w Polsce w 2012 roku. Analizowano 240 produktów, które były dostępne w aptekach, sklepach internetowych i stacjonarnych. Występowały one w różnych formach rynkowych: tabletki, kapsułki, forma sypka, płynna, inne. Najczęściej były to kapsułki i tabletki. W analizowanych produktach wykazano obecność następujących składników bioaktywnych: chromu (28,3 %), ekstraktu zielonej herbaty (24,2 %), L-karnityny (20,4 %) oraz błonnika (18,8 %). Składniki te uznawane są za bezpieczne. Ich zawartość w suplementach nie jest prawnie regulowana, a skuteczność w większości przypadków nie jest poparta wystarczającymi badaniami naukowymi.

EN

Dietary supplements have an effect on human body, affecting seriously its internal reactions. The goal of the paper was an analysis of the dietary supplements supporting weight loss, available on the Polish market in 2012. 240 products available for customers in pharmacies, online shops and stationary stores, declared as dietary supplements for weight loss have been studied. One can find that dietary supplements for weight loss occur in different shapes (tablets, capsules, powdery, fluid, etc.) among which the most popular are capsules and tablets. Several bioactive compounds have been found in analyzed products: chrome (28,3% of analyzed supplements), green tea (24,2%), L-carnitine (20.4%) and dietary fiber (18.8%). These compounds are considered to be safe but their amount in dietary supplements is not regulated by law, and their effectiveness, in most cases, is not supported by scientific research offering the assurance that their actions support weight loss.

15

The evaluation of basic energetic output in obesitology practice as a way of solving weight loss problems and estabilising individual levels of strain

75%

Martinik K. , Fialova D. , Ryba J. , Fiala Z.

Żywienie Człowieka i Metabolizm. Suplement

|

2000

|

tom 27

16

Postharvest peach weight loss, water content, and outer layer firmness

75%

Zhang X. , Brusewitz G. H. , Puchalski C.

International Agrophysics

|

1996

|

tom 10

|

nr 2

17

Effect of cultivation method on storage durability of common onions. Part I. Weight losses and bulb rotting

75%

Gruszecki R. , Tendaj M.

Annales Universitatis Mariae Curie-Skłodowska. Sectio EEE: Horticultura

|

2000

|

tom 08

18

Effect of different methods of freezing on weight losses and taste qualities of normal and enriched horsemeat during 6-month cold storage

75%

Kondratowicz J. , Bak T.

Roczniki Instytutu Przemysłu Mięsnego i Tłuszczowego

|

1998

|

tom 35

|

nr 1

19

Corrosion performance of aluminum zinc coated steel in tomato, orange and pineapple juices

63%

Adetunji O. R. , Akinyemi O. J. , Kuye S. I. , Dare E. O.

Ochrona przed Korozją

|

2016

|

tom nr 3

66--69

EN

Fruit juice processing facilities, storage and waste fruits disposable cans are sourced based on several considerations ranging from cost, durability and health implications. This study evaluated the corrosion performance of Aluminum zinc coated steel (Aluzinc), in three media (tomato, orange and pineapple juices). These media were chosen due to their social and economic importance. Samples of Aluzinc, were prepared by cutting into 3 × 3 cm from 0.5 mm thick plate. Three of the prepared samples were used for Potentiodynamic Polarization Experiments (PPE) while 54 samples were used for Weight Loss Method (WLM). Each of the prepared samples for WLM was cleaned, weighed and immersed in the media for 30 days. The samples were removed at the end of immersion, cleaned and reweighed. The weight losses obtained for WLM were used to evaluate the corrosion rates. The results obtained for the corrosion rates in mm/yr using PPE in orange, pineapple and tomato juices were 0.0065, 0.0303, and 0.0062 for Aluzinc. The measured pH values for the media ranged from 4.1 to 8.3. The corrosion rate of aluzinc was highest in Pineapple juice than in Tomato and Orange juice after 30 days immersion in the media. SEM images of corroded metallic samples indicated the effect of corrosion on them.

PL

Urządzenia używane w przetwórstwie soków, jak i pojemniki jednorazowe stosowane do magazynowania soków i ich odpadów, dobierane są z uwzględnieniem ich ceny, trwałości oraz bezpieczeństwa dla zdrowia. Przeprowadzono badania zachowania stali z powłoką cynkowo-aluminiową umieszczonej w trzech różnych mediach (sok pomidorowy, pomarańczowy i ananasowy). Media te wybrano ze względu na ich znaczenie społeczne i gospodarcze. Próbki alucynku przygotowano wycinając płytki o rozmiarach 3 × 3 cm z blachy o grubości 0,5 mm. Trzy z przygotowanych próbek użyto w badaniach metodą polaryzacji potencjodynamicznej, a 54 próbki wykorzystano do oznaczania ubytku masy. Każdą z próbek przeznaczonych do badań metodą WLM wyczyszczono, zważono i zanurzono w wybranym medium przez 30 dni. Następnie próbki wyciągnięto, wyczyszczono i ponownie zważono. Uzyskane wartości ubytku masy wykorzystano do oceny stopnia korozji. Szybkość korozji wyrażona w mm/rok określona na podstawie badania PPE po zanurzeniu próbek w soku pomarańczowym, ananasowym i pomidorowym wynosiła odpowiednio 0,0065, 0,0303 i 0,0062. Wartości pH dla użytych mediów mieściły się w przedziale od 4,1 do 8,3. Szybkość korozji alucynku była największa w przypadku soku ananasowego, następnie pomidorowego, a na końcu pomarańczowego. Próbki metalowe widziane na zdjęciach SEM nosiły ślady korozji.

20

Badania zmian temperatury i masy pieczarek podczas schładzania próżniowego

63%

Kopec A. , Dolik K.

Acta Agrophysica

|

2013

|

tom 20

|

nr 2

PL

W pracy przedstawiono wyniki badań nad próżniowym schładzaniem pieczarek. Schładzano je w komorze próżniowej podłączonej do pompy próżniowej. Podczas schładzania mierzone były następujące parametry: temperatura w komorze, temperatura na powierzchni pieczarki, temperatura w centrum pieczarki, zmiany masy pieczarek oraz ciśnienie w komorze. Na podstawie uzyskanych wyników przedstawiono kinetykę zmian temperatury w centrum i na powierzchni pieczarek podczas badanego procesu. Przeanalizowano zmiany masy schładzanych pieczarek i zmiany ciśnienia w komorze próżniowej. Przedstawiono tabelaryczną zależność ubytku masy od temperatury schładzanych grzybów. Najwyższa szybkość obniżania temperatury wystąpiła w początkowym fazie schładzania i wyniosła 2,7 deg·min-1. W końcowym okresie szybkość schładzania zmalała do 0,75 deg·min-1. Podobnie jak w przypadku zmian temperatury szybkość zmian masy malała wraz z czasem trwania procesu schładzania. Na początku wynosiła 1,8 g·min-1, a w końcowym okresie zmalała do 1,2 g·min-1. Średnia szybkość ubytku masy podczas całego procesu wyniosła 1,4 g·min-1.

EN

The paper presents the result of research on mushroom vacuum cooling. The mushrooms was cooled in a vacuum chamber connected to a vacuum pump. During the cooling the following parameters were measured: the temperature in the chamber, the temperature at the surface of the mushrooms, the temperature in the centre of the mushroom cap, the changes in mushrooms weight, and the pressure in the chamber. On the basis of the results the kinetics of temperature changes in the centre and on the surface of mushrooms in the course of the process studies was presented. The changes of cooled mushrooms weight and pressure changes in the vacuum chamber were analysed. The tabular dependence between the weight loss and the temperature of cooled mushrooms was presented. The maximum cooling rate was in the first phase of the process and its value was 2.7 deg min-1. At the end of the process the cooling rate decreased to 0.75 deg min-1. The weight loss rate also decreased during the cooling process. At the beginning it was 1.8 g min-1 and at the end it decreased to 1.2 g min-1. The average mass loss rate during the whole process was 1.4 g min-1.