Results 91 to 100 of about 998,789 (338)

Mechanical properties and rock-breaking effects of ridge-shaped PDC teeth

Jin'gangshi yu moliao moju gongcheng
Objectives: With the depletion of easily recoverable oil reservoirs, the focus of oil and gas exploration and development in China has shifted to "two deeps and non-conventional" oil and gas fields.
Zhitao XIE, Yuxuan ZHAO, Yong GUO, Desheng WU, Yadong LI   +4 more
doaj   +1 more source

Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics

FEBS Open Bio, EarlyView.
Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini, Nicolò Antonelli, Gianluca Molla   +2 more
wiley   +1 more source

Дослідження впливу форми зубка на міцність його з'єднання з корпусом шарошки [PDF]

, 2010
Розглянуто вплив конструкції твердосплавного зубка на величину натягу по краю отвору в корпусі шарошки і на зусилля випресування. Встановлено оптимальний кут нахилу конічної поверхні зубка.Рассмотрено влияние конструкции твердосплавного зубка на величину
Вуйцік, Д.С., Вуйцік, С.Д., Вуйцік, С.С., Пітулей, Л.Д., Роп'як, Л.Я., Шуляр, І.О.   +5 more
core  

Dietary nitrate and nitrite protect against doxorubicin‐induced cardiac fibrosis and oxidative protein damage in tumor‐bearing mice

FEBS Open Bio, EarlyView.
Chemotherapies such as doxorubicin can have toxic effects on healthy cardiovascular/heart tissue. Following up on a doxorubicin toxicity study in mice without tumors where nitrate water was cardioprotective (lessened toxicity), this study with tumor‐bearing mice undergoing doxorubicin treatment showed no negative effect of nitrate and nitrite on drug ...
Rama D. Yammani, Xiaofei Chen, Nildris Cruz‐Diaz, Xuewei Zhu, Swati Basu, Daniel B. Kim‐Shapiro, David R. Soto‐Pantoja, Leslie B. Poole   +7 more
wiley   +1 more source

Experiment and Numerical Simulation on Shale Cutting and Breaking of Special-shaped Cutter

Shiyou jixie
In order to solve the problems of low rock-breaking efficiency and short service life of PDC bit in drilling shale gas wells, a study was made on the shale cutting and breaking mechanism of special-shaped cutter.Based on typical special-shaped cutters ...
Wen Bo, Zhang Chunliang, Wu Hao, Ren Haitao, Yang Yingxin   +4 more
doaj  

IMPROVING THE EFFICIENCY OF PROCESSING SHAPED SURFACES WITH CARBIDE CUTTERS

, 2022
The article discusses ways to improve the performance of carbide cutters on shaped surfaces, as well as used cutters for processing shaped surfaces.
openaire   +1 more source

Diabetes‐induced vascular calcification is associated with low pyrophosphate and its oral supplementation prevents calcification in diabetic mice

FEBS Open Bio, EarlyView.
Induction of diabetes in three different mouse strains uniformly resulted in an increase in TNAP activity and a reduction in pyrophosphate (PPi) in the circulation. Inhibition of TNAP restored plasma PPi. Diabetes‐induced calcification in the media layer of the aorta was detected only in the Abcc6−/− strain, which is predisposed to ectopic ...
Krisztina Fülöp, Eszter Kozák, Natália Tőkési, Lilian Kocsis, Anikó Kelemen, Zsuzsanna Geszti, Adriána Kutás, Mariann Harangi, Ágnes Diószegi, Zsolt Rapi, József Balla, Olivier Le Saux, András Váradi, Viola Pomozi   +13 more
wiley   +1 more source

TEMPERATURE EVALUATION UNDER CURVED-EDGE TOOL CUTTING

Advanced Engineering Research, 2014
A theoretical model for determining temperature on the working surfaces of the tool with the blade shaped profile is considered. Analytical dependences for estimating the thermal state of the blade front face (tooth cutter) with an elliptical profile in ...
Anatoly Andreyevich Ryzhkin, Denis Vitalyevich Moiseyev   +1 more
doaj   +1 more source

ATP13A2 is involved in intracellular polyamine transport in lung epithelial cells

FEBS Open Bio, EarlyView.
Spermidine transport in lung epithelial cells involves the polyamine transporter ATP13A2. Cell proliferation is associated with the upregulation of ATP13A2. Polyamines are present in all living cells and are implicated in various crucial cellular processes such as proliferation, apoptosis and autophagy.
Yuta Hatori, Kohei Kawabata, Takanori Kubo, Takeo Kitazawa, Sae Kanai, Madoka Iwashita, Ami Hayashi, Hiroyuki Nishi, Mikihisa Takano   +8 more
wiley   +1 more source

Experimental study on the influence of cutter shape on cutter wear for hard rocks

IOP Conference Series: Earth and Environmental Science, 2021
Hongsu Ma, Liang Chen, Yandong Yang, Bing Zhang, Ju Wang   +4 more
openaire   +1 more source