Petra Niklowitz

2.0k citations

55 papers · 1.7k indexed · h-index 24

Impact in

Endocrine and Autonomic Systems top 5%
- Circadian rhythm and melatonin
Biochemistry top 2%
- Biochemical Acid Research Studies
- Antioxidant Activity and Oxidative Stress

Papers in

Endocrine and Autonomic Systems 12
- Circadian rhythm and melatonin 10
Aging 3

Co-authors: Thomas Menke Frank Döring Werner Andler Gerald Rimbach Constance Schmelzer Inka Lindner Eberhard Nieschlag Thomas Reinehr
Journals: BioFactors (13 papers)Biology of Reproduction (4 papers)Clinica Chimica Acta (4 papers)Journal of Pineal Research (2 papers)Analytical Biochemistry (2 papers)
Partner nations: Germany United States India

In The Last Decade

Petra Niklowitz

55 papers receiving 1.6k citations

Peers

Countries citing papers authored by Petra Niklowitz

Since Specialization

Citations

This map shows the geographic impact of Petra Niklowitz's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Petra Niklowitz with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Petra Niklowitz more than expected).

Fields of papers citing papers by Petra Niklowitz

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Petra Niklowitz. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Petra Niklowitz. The network helps show where Petra Niklowitz may publish in the future.

Co-authors

The 25 scholars most cited alongside Petra Niklowitz, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Petra Niklowitz Line = papers co-authored together Petra Niklowitz links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Natural autoantibodies to the gonadotropin-releasing hormone receptor in polycystic ovarian syndrome PLoS ONE ·Charles Campbell J. M. Campbell, Deborah E. Makkaoui, Waldemar B. Minich, Christoph Haudum, Petra Niklowitz, Julia Münzker, Gábor L. Kovaćs, Thomas Reinehr, Barbara Obermayer‐Pietsch, Lutz Schomburg	2021	7
2	Bioactive leptin is stronger related to parameters of fat mass and distribution than conventionally measured leptin: Findings from a longitudinal study in obese children participating in a lifestyle intervention Clinica Chimica Acta ·Petra Niklowitz, Juliane Rothermel, Nina Lass, Robert Wilkenfeld, Thomas Reinehr	2018	5
3	Coenzyme Q₁₀ redox state predicts the concentration of c‐reactive protein in a large caucasian cohort BioFactors ·Alexandra Fischer, Simone Onur, Petra Niklowitz, Thomas Menke, Matthias Laudes, Frank Döring	2016	3
4	Coenzyme Q10 Status as a Determinant of Muscular Strength in Two Independent Cohorts PLoS ONE ·Alexandra Fischer, Simone Onur, Petra Niklowitz, Thomas Menke, Matthias Laudes, Gerald Rimbach, Frank Döring	2016	25
5	Ubiquinol reduces gamma glutamyltransferase as a marker of oxidative stress in humans BMC Research Notes ·Simone Onur, Petra Niklowitz, Gunnar Jacobs, Ute Nöthlings, Wolfgang Lieb, Thomas Menke, Frank Döring	2014	24
6	Determination of coenzyme Q10 tissue status via high-performance liquid chromatography with electrochemical detection in swine tissues (Sus scrofa domestica) Analytical Biochemistry ·Petra Niklowitz, Frank Döring, Michael Paulussen, Thomas Menke	2013	18
7	The influence of LH and/or FSH on Leydig and Sertoli cell morphology after testicular involution in the Djungarian hamster, Phodopus sungorus, induced by hypophysectomy or short photoperiods* Andrologia ·Sabine Kliesch, Bin He, Petra Niklowitz, Eberhard Nieschlag, Martin Bergmann	2009	7
8	Coenzyme Q10 supplementation lowers hepatic oxidative stress and inflammation associated with diet-induced obesity in mice Biochemical Pharmacology ·Florence Sohet, Audrey M. Neyrinck, Barbara D. Pachikian, Fabienne C. De Backer, Laure B. Bindels, Petra Niklowitz, Thomas Menke, Patrice D. Cani, Nathalie M. Delzenne	2009	145
9	Functions of coenzyme Q₁₀ in inflammation and gene expression BioFactors ·Constance Schmelzer, Inka Lindner, Gerald Rimbach, Petra Niklowitz, Thomas Menke, Frank Döring	2008	225
10	Antioxidant level and redox status of coenzyme Q₁₀in the plasma and blood cells of children with diabetes mellitus type 1 Pediatric Diabetes ·Thomas Menke, Petra Niklowitz, Thomas Wiesel, Werner Andler	2008	25
11	Enrichment of coenzyme Q10 in plasma and blood cells: defense against oxidative damage International Journal of Biological Sciences ·Petra Niklowitz, Mohammad Samsuri, Bernd Janetzky, Werner Andler, Thomas Menke	2007	82
12	Effects of Coenzyme Q₁₀ on TNF‐α secretion in human and murine monocytic cell lines BioFactors ·Constance Schmelzer, D. A. Lawrence, Inka Lindner, Gerald Rimbach, Petra Niklowitz, Thomas Menke, Frank Döring	2007	48
13	Amylin and Its Relation to Insulin and Lipids in Obese Children Before and After Weight Loss Obesity ·Thomas Reinehr, Gideon de Sousa, Petra Niklowitz, Christian L. Roth	2007	39
14	Coenzyme Q10 concentration in the plasma of children suffering from acute lymphoblastic leukaemia before and during induction treatment BioFactors ·Petra Niklowitz, Thomas Wiesel, Werner Andler, Thomas Menke	2007	4
15	Coenzyme Q10 in plasma and erythrocytes: comparison of antioxidant levels in healthy probands after oral supplementation and in patients suffering from sickle cell anemia Clinica Chimica Acta ·Petra Niklowitz, Thomas Menke, Thomas Wiesel, Ertan Mayatepek, Johannes Zschocke, Jürgen G. Okun, Werner Andler	2002	37
16	Initial Expression of the Common α-Chain in Hypophyseal Pars Tuberalis-Specific Cells in Spontaneous Recrudescent Hamsters* Endocrinology ·Tobias M. Böckers, J. Bockmann, Martin Kushinsky, Petra Niklowitz, Alexander Lerchl, A Schoonheydt Robert, W. Wittkowski, Michael R. Kreutz	1997	21
17	Short photoperiod-dependent down-regulation of thyrotropin-alpha and -beta in hamster pars tuberalis-specific cells is prevented by pinealectomy. Endocrinology ·J. Bockmann, Tobias M. Böckers, Жур Анна Валерьевна, Petra Niklowitz, J. Müller, W. Wittkowski, Bernhard A. Sabel, Michael R. Kreutz	1996	56
18	Daily Melatonin Injections Induce Cytological Changes in Pars Tuberalis‐Specific Cells Similar to Short Photoperiod Journal of Neuroendocrinology ·Tobias M. Böckers, Petra Niklowitz, J. Bockmann, J.‐D. Fauteck, W. Wittkowski, Michael R. Kreutz	1995	34
19	Pattern of pineal melatonin concentrations during prolonged exposure to short photoperiods in photosensitive and photoinsensitive Djungarian hamsters Journal of Pineal Research ·Petra Niklowitz, Maria De Geyter, Stefan Schlatt, Klaus H. Hoffmann, Eberhard Nieschlag	1992	10
20	Differential Effects of Follicle-Stimulating Hormone and Luteinizing Hormone on Leydig Cell Function and Restoration of Spermatogenesis in Hypophysectomized and Photoinhibited Djungarian Hamsters (Phodopus Sungorus) Biology of Reproduction ·Petra Niklowitz, Shafiq A. Khan, Martin Bergmann, Klaus H. Hoffmann, Eberhard Nieschlag	1989	43

About Petra Niklowitz

Petra Niklowitz is a scholar working on Endocrine and Autonomic Systems, Aging, Biochemistry, Molecular Biology and Biochemistry, having authored 55 papers that have together received 1.7k indexed citations. Recurring topics across this work include Coenzyme Q10 studies and effects (37 papers), Advanced battery technologies research (21 papers), Circadian rhythm and melatonin (10 papers), Biochemical Acid Research Studies (10 papers), Free Radicals and Antioxidants (5 papers), Biochemical effects in animals (5 papers), Mitochondrial Function and Pathology (4 papers) and Spaceflight effects on biology (4 papers). The work is most often cited by research in Endocrine and Autonomic Systems (242 citations), Biochemistry (251 citations), Biochemistry (124 citations), Molecular Biology (1.0k citations) and Reproductive Medicine (115 citations). Petra Niklowitz has collaborated with scholars based in Germany, United States and India. Frequent co-authors include Thomas Menke, Frank Döring, Werner Andler, Gerald Rimbach, Constance Schmelzer, Inka Lindner, Eberhard Nieschlag, Thomas Reinehr, Jürgen G. Okun and Klaus H. Hoffmann. Their work appears in journals such as BioFactors, Biology of Reproduction, Clinica Chimica Acta, Journal of Pineal Research and Analytical Biochemistry.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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