Concepedia

Author

K. Niwa

Okayama University

Also Known As

K Niwa, K. NIWA, K. Niwa, Kenji NIWA, Kenji Niwa

95

Publications

3.3K

Citations

34

H-Index

54

Concepts

All Affiliations

Okayama UniversityKyoto UniversityOkayama University of ScienceNagoya UniversityUniversity of Massachusetts Chan Medical School
KN

About

K. Niwa is an author at Okayama University specializing in fertility, public health, and developmental biology.

Top Concepts

#ConceptH-IndexPublicationsCitations

1

Public Health

21

23

1.1K

2

Medicine

20

23

989

3

Engineering

3

3

114

4

Natural Sciences

2

2

65

5

Biology

2

2

132

K. Niwa

×

57

Publications

3.2K

Citations

34

H-Index

YearCitations

Ca<sup>2+</sup>‐Regulating mechanisms that modulate bull sperm capacitation and acrosomal exocytosis as determined by chlortetracycline analysis

Lynn R. Fraser, Lalantha R. Abeydeera, K. Niwa

Molecular Reproduction and Development

1995

255

Capacitation status and in vitro fertility of boar spermatozoa: effects of seminal plasma, cumulus‐oocyte‐complexes‐conditioned medium and hyaluronan

Keita Suzuki, Atsushi Asano, B. Eriksson,

International Journal of Andrology

2002

165

Synergistic effect of caffeine and heparin on in-vitro fertilization of cattle oocytes matured in culture

K. Niwa, O. Ohgoda

Theriogenology

1988

141

In-vitro penetration of pig oocytes matured in culture by frozen–thawed ejaculated spermatozoa

W. H. Wang, K. Niwa, K. Okuda

Reproduction

1991

138

Effect of sperm concentration during preincubation in a defined medium on fertilization <i>in vitro</i> of pig follicular oocytes

Takashi Nagai, K. Niwa, A. Iritani

Reproduction

1984

136

Functional analysis using chlortetracycline fluorescence and <i>in vitro</i> fertilization of frozen–thawed ejaculated boar spermatozoa incubated in a protein-free chemically defined medium

W. H. Wang, Lalantha R. Abeydeera, L. R. Fraser,

Reproduction

1995

128

Capacitation of bull spermatozoa and fertilization <i>in vitro</i> of cattle follicular oocytes matured in culture

A. Iritani, K. Niwa

Reproduction

1977

119

Effects of osmolarity and amino acids in a chemically defined medium on development of rat one-cell embryos

K. Miyoshi, Lalantha R. Abeydeera, K. Okuda,

Reproduction

1995

105

Development of rat one-cell embryos in a chemically defined medium: effects of glucose, phosphate and osmolarity

K. Miyoshi, Hiroaki Funahashi, K. Okuda,

Reproduction

1994

104

Effectiveness of in vitro maturation and in vitro fertilization techniques in pigs.

K. Niwa

PubMed

1993

103

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