U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject "citric acid" Remove constraint Subject: "citric acid"
Start Over

Search

7,257  Search Results

« Previous | 1 - 20 of 7,257 |
Number of results to display per page

Search Results

1. Adulteration of sucrose with citric acid: Effect on reinforcing value, examined using an adjusting-magnitude schedule of reinforcement

Author:
C.M. Bradshaw
Source:
Behavioural processes 2022 v.194 pp. 104551
ISSN:
0376-6357
Subject:
citric acid,   etc   ; adulterated products; models; sucrose;     Show all 4 Subjects
Abstract:
... According to the Multiplicative Hyperbolic Model (MHM), the value of a reinforcer is an increasing hyperbolic function of its size (q). Recently reported results indicated that dilution of a sucrose solution reduced its reinforcing value by increasing the ‘size-sensitivity’ parameter of this function and reducing its maximum. The present experiment examined whether adulterating a sucrose solution ...
DOI:
10.1016/j.beproc.2021.104551

2. A green and economical process for resource recovery from precious metals enriched residue of copper anode slime

Author:
Jinchan Xian; Nengwu Zhu; Wen Zhu; Jing Wang; Pingxiao Wu
Source:
Journal of cleaner production 2022 v.369 pp. 133341
ISSN:
0959-6526
Subject:
citric acid,   etc   ; anodes; glucose; leachates; phase transition;     Show all 5 Subjects
Abstract:
... The precious metals enriched residue of copper anode slime (PM-CAS) obtained from our previous study, creates favorable conditions for recycling resource. In this study, a green and economical process for resource recovery from PM-CAS is proposed. Results showed that 99.70% Ag and 98.65% Pd were successfully leached in 10 min by HNO₃-citric acid under optimized conditions with 99.81% Au retained i ...
DOI:
10.1016/j.jclepro.2022.133341

3. Organic food retailing: to what extent are foods processed and do they contain markers of ultra-processing?

Author:
Sylvie Davidou; Kelly Frank; Aris Christodoulou; Anthony Fardet
Source:
International journal of food sciences and nutrition 2022 v.73 no.2 pp. 172-183
ISSN:
1465-3478
Subject:
citric acid,   etc   ; glucose; nutrition; organic foods; syrups; France;     Show all 6 Subjects
Abstract:
... In France, around 70% of conventional industrial foods are ultra-processed, with no data for organic foods. The objectives of this study were to evaluate the percentage of ultra-processed foods (UPFs) in industrially packaged organic (n = 8554) and conventional (n = 45,791) foods, and to describe their marker of ultra-processing (MUP) profiles. The percentage of UPFs and MUP profiles were determin ...
DOI:
10.1080/09637486.2021.1966395

4. Metabolic Profiling of Organic Acids Reveals the Involvement of HuIPMS2 in Citramalic Acid Synthesis in Pitaya

Author:
Jiaxuan Chen; Yuanju Yuan; Fangfang Xie; Zhike Zhang; Jianye Chen; Rong Zhang; Jietang Zhao; Guibing Hu; Yonghua Qin
Source:
Horticulturae 2022 v.8 no.2 pp. -
ISSN:
2311-7524
Subject:
citric acid,   etc   ; Cactaceae; biosynthesis; cultivars; fruits; malic acid;     Show all 6 Subjects
Abstract:
... Pitayas are rich in organic acids, especially citramalic acid, which is significantly higher than the plants. However, the mechanism of citramalic acid biosynthesis remains to be fully elucidated. In this study, organic acid compositions and contents, as well as expression patterns of key genes related to organic acid metabolism were analyzed during fruit maturation of four different pitaya cultiv ...
DOI:
10.3390/horticulturae8020167

5. Comparison of Sweet–Sour Taste Interactions between Cold Brewed Coffee and Water

Author:
Jonas Yde Junge; Line Ahm Mielby; Ulla Kidmose
Source:
Beverages 2022 v.8 no.2 pp. -
ISSN:
2306-5710
Subject:
citric acid,   etc   ; cold; sourness; sucrose; sweetness; tartaric acid; taste;     Show all 7 Subjects
Abstract:
... Most beverages are complex matrices. Different taste compounds within these matrices interact, and thus affect the perception of the tastes. Sweetness and sourness have generally been known to suppress each other, but often such investigations have focused on aqueous solutions. Investigations into what happens when these known interactions are transferred to more complex solutions are scarce. In t ...
DOI:
10.3390/beverages8020032

6. Determination of drying characteristics, rehydration properties, and shrinkage ratio of convective dried melon slice with some pretreatments

Author:
Tolga Kağan Tepe; Çetin Kadakal
Source:
Journal of food processing and preservation 2022 v.46 no.6 pp. e16544
ISSN:
0145-8892
Subject:
citric acid,   etc   ; color; ethanol; melons; models; rehydration; shrinkage; temperature; ultrasonics;     Show all 9 Subjects
Abstract:
... The aim of this study was to investigate the effect of traditional and novel pretreatments (immersing ethanol solution, immersing in citric acid solution, ultrasound power, and hot water blanching) on drying and some physical properties of melon fruits cultivated in Turkey. Pretreatments significantly reduced drying time. The highest reduction (28.13%) was provided via immersing in 100% ethanol so ...
DOI:
10.1111/jfpp.16544

7. Improved permeability of tight acid resistant nanofiltration membrane via citric acid post-treatment

Author:
Ling Yu; Kuiling Li; Yong Zhang; Jun Wang; Guoliang Zhang
Source:
Journal of membrane science 2022 v.648 pp. 120381
ISSN:
0376-7388
Subject:
citric acid,   etc   ; acid tolerance; imines; nanofiltration; permeability; polyamines; wastewater treatment;     Show all 7 Subjects
Abstract:
... Development of acid resistant nanofiltration membranes (ARNFMs) with high metal rejection, high flux and low molecule weight cut-off (MWCO) remains a big challenge. The separation performance of polyamine ARNFM is partially limited by the dense structure caused by the high concentration of organic phase solution. Herein, in this work, a novel effective post-treatment of citric acid (CA) was utiliz ...
DOI:
10.1016/j.memsci.2022.120381

8. A two-stage degradation coupling photocatalysis to microalgae enhances the mineralization of enrofloxacin

Author:
Zhikun Lu; Yifeng Xu; Lai Peng; Chuanzhou Liang; Yiwen Liu; Bing-Jie Ni
Source:
Chemosphere 2022 v.293 pp. 133523
ISSN:
0045-6535
Subject:
citric acid,   etc   ; carbon dioxide; enrofloxacin; microalgae; mineralization; moieties; photocatalysis; piperazine;     Show all 8 Subjects
Abstract:
... The coupling of photocatalytic and algal processes has been used for the removal of widespread antibiotics. The removal capacities of the individual and the combined system against enrofloxacin were tested and compared in this work. Due to the low tolerance of the algae to enrofloxacin, the target compound was barely degraded during the individual algal treatment. In the individual photocatalytic ...
DOI:
10.1016/j.chemosphere.2022.133523

9. Deep eutectic solvents comprising creatine and citric acid and their hydrated mixtures

Author:
Matthew P. Heaney; Laxmi Adhikari; Asher L. Siegel; Kyle B Pekar; Jonathan B Lefton; Claire McGuire; Pokpong Rungthanaphatsophon; Justin R. Walensky; Gary A. Baker; Tomče Runčevski
Source:
Chemical communications 2022 v.58 no.17 pp. 2838-2841
ISSN:
1364-548X
Subject:
citric acid,   etc   ; creatine; glass transition temperature; physical phases; solvents; viscosity;     Show all 6 Subjects
Abstract:
... We report the phase diagram for the binary creatine–citric acid mixture which features a stable and broad eutectic region. Combinations containing 10–60 mol% creatine yield a deep eutectic solvent with a glass transition temperature at 270 K. Addition of up to 70 mol% water to the binary mixture affords retention of the eutectic nature and a handle to vary solvent viscosity and polarity. ...
DOI:
10.1039/d1cc06088k

10. Effect of additives on the remediation of arsenic and chromium co-contaminated soil by an electrokinetic-permeable reactive barrier

Author:
Chunzi Ma; Jiangpeng Li; Wei Xia; Ying Ding; Liting Zhang; Yunfeng Xu
Source:
Environmental science and pollution research 2022 v.29 no.8 pp. 11966-11975
ISSN:
0944-1344
Subject:
citric acid,   etc   ; adsorption; arsenic; ascorbic acid; chromium; pollution; remediation; research;     Show all 8 Subjects
Abstract:
... To enhance the remediation efficiency of arsenic (As) and chromium (Cr)co-contaminated soil, the effect of various combinations of reducing and chelating agents on the removal of As and Cr was studied in the present work by using electrokinetic technology coupled with a permeable reactive barrier (EK-PRB). In an experiment with EK-PRB, reducing agents (ascorbic acid and citric acid) and chelating ...
DOI:
10.1007/s11356-021-16357-1

11. Facile synthesis of multifunctional carbon dots with 54.4% orange emission for label-free detection of morin and endogenous/exogenous hypochlorite

Author:
Yating Meng; Zhuqing Zhang; Hongxia Zhao; Yuan Jiao; Jun Li; Shaomin Shuang; Chuan Dong
Source:
Journal of hazardous materials 2022 v.424 pp. 127289
ISSN:
0304-3894
Subject:
citric acid,   etc   ; Danio rerio; biocompatibility; bioimaging; hypochlorites; photoluminescence; photostability; toxicity;     Show all 8 Subjects
Abstract:
... Carbon dots with long-wavelength emission (orange to red), high quantum yield (QY) and good biocompatibility are of great significance for biomedical applications, but achieving this is still a highly challenging task. In this work, multifunctional carbon dots with 54.4% orange emission (O-CDs) were prepared through one-pot solvothermal treatment of nileblueasulphate and citric acid as precursor f ...
DOI:
10.1016/j.jhazmat.2021.127289

12. Fast and efficient “on-off-on” fluorescent sensor from N-doped carbon dots for detection of mercury and iodine ions in environmental water

Author:
Yongli Liu; Penghui Zhou; Yalin Wu; Xiaoyan Su; Huanjia Liu; Guifen Zhu; Qingxiang Zhou
Source:
Science of the total environment 2022 v.827 pp. 154357
ISSN:
0048-9697
Subject:
citric acid,   etc   ; electron transfer; environment; fluorescence; iodine; mercury; nitrogen; polyethyleneimine;     Show all 8 Subjects
Abstract:
... A kind of nitrogen doped carbon dots (N-CDs) was facilely fabricated from polyethyleneimine and anhydrous citric acid, and which was adopted to develop a neoteric “on-off” and “off-on” fluorescent sensor for rapidly and efficiently sensing Hg²⁺ and I⁻. The fluorescence of N-CDs was notably quenched (off) in the existence of Hg²⁺ derived from strong interaction and the electron transfer between N-C ...
DOI:
10.1016/j.scitotenv.2022.154357

13. A Surface Diffusion Barrier Strategy toward Water-Resistant Photonic Materials for Accurate Detection of Ethanol

Author:
Zi-Li Wang; Ze-Peng Deng; Xiu Dong; Lan Bai; Xiu-Li Wang; Yu-Zhong Wang; Fei Song
Source:
ACS applied materials & interfaces 2022 v.14 no.26 pp. 30352-30361
ISSN:
1944-8252
Subject:
citric acid,   etc   ; colorimetry; composite films; ethanol; hydrophilicity; photons; water solubility;     Show all 7 Subjects
Abstract:
... Photonic materials that enable visual detection of chemicals have shown great potential for wide applications in chemical, environmental, biotechnological, and food industries, but until now, using hydrophilic photonic materials for tracing water-soluble chemicals remains a major challenge due to the strong water interference. Here, we demonstrate a two-step co-assembly and subsequent surface coat ...
DOI:
10.1021/acsami.2c04995

14. A closed-loop acetic acid system for recovery of PbO@C composite derived from spent lead-acid battery

Author:
Guang Hu; Peiyuan Zhang; Jiakuan Yang; Zhaoyang Li; Sha Liang; Wenhao Yu; Mingyang Li; Yuxin Tong; Jingping Hu; Huijie Hou; Shushan Yuan; R. Vasant Kumar
Source:
Resources, conservation, and recycling 2022 v.184 pp. 106391
ISSN:
0921-3449
Subject:
citric acid,   etc   ; batteries; carbon; citrates; electrochemistry; filtrates; filtration; lead acetate;     Show all 8 Subjects
Abstract:
... The current hydrometallurgical recovery routes of spent lead paste generate a large amount of acid/alkali residual filtrate, bringing significant technical and environmental challenge. In this study, the low-impurity lead acetate solution was prepared by reacting desulfurized paste with acetic acid (HAc), which then reacted with citric acid to synthesize high-quality lead citrate. Further crystall ...
DOI:
10.1016/j.resconrec.2022.106391

15. MIP-Based Portable Sensors for the Simultaneous Analysis of Multiple Food Additives

Author:
Pei-Xia Sun; Juan Cai; Li-Jie Chen; Jian Wang; Chun Yang
Source:
Food analytical methods 2022 v.15 no.8 pp. 2335-2345
ISSN:
1936-9751
Subject:
citric acid,   etc   ; benzoic acid; chromatography; mass transfer; molecular imprinting; sodium cyclamate;     Show all 6 Subjects
Abstract:
... With portable capacitative sensors, a universal method has been established to analyze different organic compounds from real samples. Firstly, the object compounds serve as templates in the preparation of molecularly imprinted polymers (MIPs). The resulted polymers are promising materials to fabricate highly sensitive and highly selective sensors for the templates. Low mass transfer resistance in ...
DOI:
10.1007/s12161-022-02273-8

16. Facile preparation of Cu-doped carbon dots for naked-eye discrimination of phenylenediamine isomers and highly sensitive ratiometric fluorescent detection of H2O2

Author:
Dandan Zhao; Yijun Huang; Huixiang Ouyang; Bingfang Shi; Suping Li; Shengyu Chen; Shulin Zhao
Source:
Talanta 2022 v.239 pp. 123110
ISSN:
0039-9140
Subject:
citric acid,   etc   ; blood serum; detection limit; fluorescence; fluorescent dyes; humans; oxidation;     Show all 7 Subjects
Abstract:
... Changing a detection analyte into a colored material is a key challenge for visual discrimination of isomers. In this work, a novel fluorescent probe incorporating Cu-doped carbon dots (Cu-CDs), for the first time, was developed for naked-eye discrimination of phenylenediamine isomers and highly sensitive ratiometric fluorescence detection of H₂O₂. In this strategy, Cu-CDs were synthesized by a fa ...
DOI:
10.1016/j.talanta.2021.123110

17. Synergistic removal of Cr(VI) by S-nZVI and organic acids: The enhanced electron selectivity and pH-dependent promotion mechanisms

Author:
Yibo Yuan; Xipeng Wei; Hua Yin; Minghan Zhu; Haoyu Luo; Zhi Dang
Source:
Journal of hazardous materials 2022 v.423 pp. 127240
ISSN:
0304-3894
Subject:
citric acid,   etc   ; adsorption; chromium; electron transfer; iron; oxalic acid; pH; remediation;     Show all 8 Subjects
Abstract:
... The effects of organic acids on hexavalent chromium (Cr(VI)) removal by reduced iron-based materials have been extensively studied. Nevertheless, the promotion mechanism from the perspective of the electron transfer process is still unclear. Herein, sulfidated nanoscale zero-valent iron (S-nZVI) and the selected organic acids, citric acid (containing both -OH and −COOH groups) and oxalic acid (con ...
DOI:
10.1016/j.jhazmat.2021.127240

18. The facile synthesis of nitrogen and sulfur co-doped carbon dots for developing a powerful “on-off-on” fluorescence probe to detect glutathione in vegetables

Author:
Xinyang Sun; Chao Wang; Peng Li; Zhiying Shao; Ji Xia; Qin Liu; Fei Shen; Yong Fang
Source:
Food chemistry 2022 v.372 pp. 131142
ISSN:
0308-8146
Subject:
citric acid,   etc   ; cysteine; fluorescence; fluorescent dyes; food chemistry; glutathione; nitrogen; pyrolysis;     Show all 8 Subjects
Abstract:
... To determine the glutathione (GSH) content in vegetables, an “on-off-on” fluorescence probe was developed by a synthesis of nitrogen and sulfur co-doped carbon dots (N,S-CDs) using the microwave pyrolysis considering citric acid and L-cysteine as precursors. The fluorescence of N,S-CDs was quenched by adding Cu²⁺ at a concentration of 20–200 μmol/L due to the inner filter effect. The quenched fluo ...
DOI:
10.1016/j.foodchem.2021.131142

19. The preparation of antibacterial eco-friendly bio-based PTT-based β-cyclodextrin by complexation of copper and zinc ions

Author:
Jinping Zhang; Lingxi Qu; Yao Lin; Zhiguang Guo; Zaisheng Cai; Fengyan Ge
Source:
Textile research journal 2022 v.92 no.15-16 pp. 2800-2807
ISSN:
1746-7748
Subject:
citric acid,   etc   ; Escherichia coli; adsorption; copper; fabrics; public health; research; zinc;     Show all 8 Subjects
Abstract:
... There has been an increasing focus on antibacterial textiles owing to their widespread applications in global public health. In this study, we prepared antibacterial bio-based poly (trimethylene terephthalate) (PTT) by multi-crosslinking with citric acid among PTT and β-cyclodextrin (β-CD), and then adsorbing zinc and copper ions. The results show that β-cyclodextrin was successfully grafted onto ...
DOI:
10.1177/00405175211013834

20. Production of biogas by microorganisms with saccharine sorghum straw as substrate with or without alkaline and citric pretreatment

Author:
Eduardo de Rossi; Maria Herminia Ferreira Tavares; Joel Gustavo Teleken; Paulo André Cremonez; Divair Christ; Simone Damasceno Gomes; Reinaldo Aparecido Bariccatti
Source:
Renewable energy 2022 v.197 pp. 617-626
ISSN:
0960-1481
Subject:
citric acid,   etc   ; biogas; gas production (biological); lignocellulose; methane; straw; synergism; urea;     Show all 8 Subjects
Abstract:
... This study proposes the use of mixtures of straws with different pretreatments (citric acid or NaOH: urea) and straw in natura, in anaerobic biodigestion. As this straw is a lignocellulosic material with slow degradation by microorganisms, it is necessary to apply pretreatments, increasing biogas production and consumption of volatile solids. The pretreated material can be used to increase the sol ...
DOI:
10.1016/j.renene.2022.07.137