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KUALITAS PELAKSANAAN TUTORIAL TATAP MUKA S-1 PENDAS DI UPBJJ-UT PANGKALPINANG Simanjuntak, Haholongan; Rumanta, Maman
Jurnal Pendidikan Terbuka Dan Jarak Jauh Vol 14 No 2 (2013)
Publisher : LPPM Universitas Terbuka

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This article is a descriptive study that describes the quality of face-to-face tutorials in undergraduate studies at UPBJJ Pangkalpinang during the registration period of 2011.2. The method used in this study is a survey using a questionnaire. The population of the study consists of all tutors and undergraduate students that conduct face-to-face tutorials in all study groups throughout UPBJJ-UT Pangkalpinang region during the registration period of 2011.2. Samples were taken with a purposive random sampling. The aim of this study is focused on the implementation of the tutorial for undergraduate students. The study will also discuss a few other aspects: (a). Students profile (b). Tutors: knowledge and skills of tutors, and tutors commitment in implementing the tutorial. (c). Teaching materials and supplies. (d). Tutorial location and facilities. The results of this experiment are: (1) Students attendance and participation in tutorial activities are good enough, as seen during the tutorial almost all the students are present and active. Most students wish there is a face-to-face tutorial conducted for all offered courses. (2). Tutorial implementation run well according to the schedules. The tutorial provided good support to students in their learning process at UT and these activities can eliminate the perception that learning at UT is only needed when the final exams approach. (3). Tutors capability in implementing face-to-face tutorials in undergraduate studies within the 2011.2 PGSD registration period is categorized as good, partly because the S-1 PGSD tutors had received training and capacity building before carrying out the tutorial. (4). The District Education Office takes a solid role in organizing tutorials, including provision of tutorial venues (usually done in school buildings), provision of accommodation for students who live remotely from the tutorial venue, and keeping students informed on tutorial schedules and venues. Artikel ini adalah penelitian deskriptif yang menggambarkan kualitas TTM S-1 Pendas di UPBJJ-UT Pangkalpinang pada masa registrasi 2011.2. Metode yang digunakan dalam penelitian ini adalah survei dengan menggunakan angket dan observasi. Populasi dalam penelitian ini seluruh tutor dan mahasiswa program S-1 Pendas yang melaksanakan kegiatan TTM di seluruh pokjar yang ada di wilayah UPBJJ-UT Pangkalpinang masa registrasi 2011.2. Sampel diambil dengan purposive random sampling. Tujuan penelitian ini difokuskan pada pelaksanaan tutorial bagi mahasiswa program S-1 Pendas. Selain itu dibahas pula berbagai aspek antara lain: (a). Profil mahasiswa (b). Tutor: pengetahuan dan keterampilan tutor dan komitmen tutor dalam melaksanakan tutorial. (c). Bahan Ajar dan bahan pendukung. (d). Tempat dan fasilitas kegiatan tutorial. Hasil penelitian ini adalah: (1) Pada kegiatan tutorial, kehadiran dan peran serta mahasiswa cukup baik, hal ini terlihat pada saat tutorial berlangsung hampir semua mahasiswa hadir dan aktif. Sebahagian besar mahasiswa menginginkan agar semua matakuliah yang ditawarkan dilaksanakan tutorial tatap muka. (2). Pelaksanaan tutorial pada prinsipnya berjalan dengan baik sesuai dengan jadwal yang telah ditentukan. Pelaksanaan Tutorial sangat membantu mahasiswa dalam proses pembelajaran di UT dan kegiatan ini dapat menghilangkan kesan bahwa kuliah di UT hanya cukup belajar menjelang UAS saja. (3). Kemampuan para Tutor dalam pelaksanaan TTM S-1 PGSD masa registrasi 2011.2 termasuk kategori baik, antara lain karena para tutor S-1 PGSD telah mengikuti pelatihan dan pembekalan tutor sebelum melaksanakan tutorial. (4). Peran Dinas Pendidikan Kabupaten/Kota sangat baik dalam penyelenggaraan tutorial, antara lain dengan menyediakan tempat tutorial (biasanya dilakukan di gedung-gedung sekolah), menyediakan tempat tinggal bagi mahasiswa yang rumahnya jauh dari tempat tutorial serta menginformasikan kepada mahasiswa tentang waktu dan tempat pelaksanaan tutorial.

KONSENTRASI TIMBAL (Pb) PADA PERAIRAN DI SEKITAR TELUK JAKARTA Rumanta, Maman; Latief, Amril; Rahayu, Ucu; Ratnaningsih, Anna; Nurdin, Gusti
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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he purpose of this study is to get information about river that has the greatest contribution to cause Pb pollution in the Jakarta Bay. Nine (9) of 13 rivers flowing into Jakarta Bay were chosen. They were Citarum, Bekasi, Cilincing, Marunda, Ciliwung, Sunter, Cideng, Angke, and Cisadane. Sampling were taken in two periods of times, rainy and dry season of 2006 with triple repeatations. pH and temperature of samples as proponent data were measured insitu. Pb concentration in the water of the river was measured by using AAS flame in the laboratory of Balai Penelitian Tanah Bogor. Data was analyzed statistically (one way ANOVA and t-test) by using SPSS 11.5 software. It was shown that Pb concentration of estuary water surrounding Jakarta Bay has been exceeding threshold level. There was a tendency that Pb concentrations of water in rainy season are lower than that in dry season except in Ciliwung River. The anomaly of Ciliwung River was probably caused by some industries which throw their wastes into Ciliwung River in the rainy season. It was concluded that all of 9 rivers have a significant contribution to Pb pollution in Jakarta Bay, and the most was from Ciliwung River.

ANALISIS KANDUNGAN BORAKS PADA MAKANAN: STUDI KASUS DI WILAYAH KECAMATAN PAMULANG, TANGERANG SELATAN Rumanta, Maman; Iryani, Krisna; Ratnaningsih, Anna
Jurnal Matematika Sains dan Teknologi Vol 17 No 1 (2016)
Publisher : LPPM Universitas Terbuka

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This study aimed to analyze borax content in food and the effects of food processing on the content of borax in food. This research adopted a survey method. Food samples were obtained from the traditional and modern markets, elementary schools, and supermarkets available in the region of Pamulang Subdistrict. Sampling was done by using a purposive technique. Each sample was qualitatively analyzed for its borax content using a borax test kit. The detected food was then analyzed by using a qualitative analysis (i.e., there are four categories of data); one sample per category was taken to be analyzed quantitatively using the HPLC method in the Laboratorium of Balai Besar Pusat Penelitian dan Pengembangan Pascapanen Pertanian, Bogor. The treatment of food containing the highest level of borax) was conducted by boiling them during a certain period of time (i.e., 5 minutes, 15 minutes, and 30 minutes) and then frying them until well cooked (was not burnt). The collected data were then analyzed descriptively. The results showed that 54% of the samples obtained from the Elementary Schools positively contained borax; as much as 74% of the food samples obtained from traditional markets contained borax positively; while all samples coming from the supermarkets did not contain borax. The content of borax in the detected food in this research ranged between 560 mg/kg up to 17,640 mg/kg. The highest content of borax found in yellow wet noodles (17,640 mg/kg) was far above the maximum level specified by EFSA (2013), that is as much as 4,000 mg/kg. The boiling process was quite effective in lowering the level of borax in food, while the frying process did not actually reduce the level of borax in food. Penelitian ini bertujuan untuk menganalisis kandungan boraks pada makanan dan pengaruh pengolahan makanan terhadap kandungan boraks pada makanan. Penelitian ini dilakukan dengan metode survei. Jenis makanan yang dijadikan sampel dalam penelitian ini adalah jenis makanan yang diperoleh dari pasar tradisional dan modern, sekolah dasar, dan supermarket di wilayah Kecamatan Pamulang. Pengambilan sampel dilakukan dengan menggunakan teknik purposive sampling. Setiap sampel dianalisis kandungan boraksnya secara kualitatif menggunakan test kit boraks. Selanjutnya, makanan yang telah terdeteksi oleh analisis kualitatif (ada empat kategori data), diambil satu sampel per kategori untuk dianalisis secara kuantitatif menggunakan metode HPLC di Laboratorium Balai Besar Pusat Penelitian dan Pengembangan Pascapanen Pertanian, Bogor. Makanan yang terdeteksi mengandung boraks paling tinggi diperlakukan dengan cara direbus dalam beberapa rentang waktu (5 menit, 15 menit, dan 30 menit) dan digoreng sampai matang (tidak sampai gosong). Data yang dikumpulkan dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa 54% dari sampel makanan yang diperoleh dari Sekolah Dasar positif mengandung boraks; sebanyak 74% dari sampel makanan yang diperoleh dari pasar tradisional positif mengandung boraks; sementara semua sampel berasal dari supermarket tidak terdeteksi mengandung boraks. Kandungan boraks dalam makanan yang terdeteksi dalam penelitian ini berkisar antara 560 mg/kg sampai dengan 17.640 mg/kg. Kandungan tertinggi ditemukan dalam mie basah kuning (17.640 mg/kg) jauh di atas kadar maksimum yang ditentukan EFSA (2013) sebanyak 4.000 mg/kg. Proses perebusan cukup efektif dalam menurunkan kadar boraks dalam makanan, sedangkan proses penggorengan tidak mengurangi kadar boraks dalam makanan.

THE EFFECTS OF SCIENTIFIC-BASED LEARNING STRATEGY (IMAGES MEDIA AND LECTURE METHOD) AND STUDENTSâ€™ LEARNING MOTIVATION TOWARDS SCIENCE ACHIEVEMENT ON STUDENTS OF CIRUAS 2 ELEMENTARY SCHOOL Rodiyah, Rodiyah; Santosa, Cecep Anwar Hadi Firdos; Rumanta, Maman
Jurnal Penelitian Pendidikan IPA Vol 5, No 1 (2020): Juni 2020
Publisher : Perkumpulan Pendidik IPA Indonesia (PPII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jppipa.v5n1.p6-14

This study aims to determine the effects of scientific-based learning strategy (images media and lecture method) and studentsâ€™ learning motivation towards the studentsâ€™ achievement of learning science. This research applied 2 x 2 factorial design, a type ofquasi-experimental design. Results are as follows: (1) there are differences in the studentsâ€™ achievement of learning science between students who are taught using thescientific-basedlearning strategy withimages media and students who are taught usingscientific-basedlearning strategywith lecture method, (2) there are differences in the studentsâ€™ achievement of learning science between students who have a strong learning motivation and students who have a weak learning motivation, (3) For students who have a strong learning motivation, whether the studentsâ€™ achievement of learning science are higher when taught withscientific-based learning strategywith images media than with the lecture method, (4) For students who have a weak learning motivation, are the results of learning science higher when taught with the scientific-based learning strategy with lecture method compared to thescientific-basedlearning strategy withimages media, (5) there is an interaction between scientific-based learning strategyand studentsâ€™ learning motivation towards studentsâ€™ achievement of learning science.Keywords: Scientific Based Learning, studentsâ€™ learning motivation, studentsâ€™ achievement of learning science

ANALISIS KANDUNGAN BORAKS PADA MAKANAN: STUDI KASUS DI WILAYAH KECAMATAN PAMULANG, TANGERANG SELATAN Maman Rumanta; Krisna Iryani; Anna Ratnaningsih
Jurnal Matematika Sains dan Teknologi Vol. 17 No. 1 (2016)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/jmst.v17i1.186.2016

This study aimed to analyze borax content in food and the effects of food processing on the content of borax in food. This research adopted a survey method. Food samples were obtained from the traditional and modern markets, elementary schools, and supermarkets available in the region of Pamulang Subdistrict. Sampling was done by using a purposive technique. Each sample was qualitatively analyzed for its borax content using a borax test kit. The detected food was then analyzed by using a qualitative analysis (i.e., there are four categories of data); one sample per category was taken to be analyzed quantitatively using the HPLC method in the Laboratorium of Balai Besar Pusat Penelitian dan Pengembangan Pascapanen Pertanian, Bogor. The treatment of food containing the highest level of borax) was conducted by boiling them during a certain period of time (i.e., 5 minutes, 15 minutes, and 30 minutes) and then frying them until well cooked (was not burnt). The collected data were then analyzed descriptively. The results showed that 54% of the samples obtained from the Elementary Schools positively contained borax; as much as 74% of the food samples obtained from traditional markets contained borax positively; while all samples coming from the supermarkets did not contain borax. The content of borax in the detected food in this research ranged between 560 mg/kg up to 17,640 mg/kg. The highest content of borax found in yellow wet noodles (17,640 mg/kg) was far above the maximum level specified by EFSA (2013), that is as much as 4,000 mg/kg. The boiling process was quite effective in lowering the level of borax in food, while the frying process did not actually reduce the level of borax in food. Penelitian ini bertujuan untuk menganalisis kandungan boraks pada makanan dan pengaruh pengolahan makanan terhadap kandungan boraks pada makanan. Penelitian ini dilakukan dengan metode survei. Jenis makanan yang dijadikan sampel dalam penelitian ini adalah jenis makanan yang diperoleh dari pasar tradisional dan modern, sekolah dasar, dan supermarket di wilayah Kecamatan Pamulang. Pengambilan sampel dilakukan dengan menggunakan teknik purposive sampling. Setiap sampel dianalisis kandungan boraksnya secara kualitatif menggunakan test kit boraks. Selanjutnya, makanan yang telah terdeteksi oleh analisis kualitatif (ada empat kategori data), diambil satu sampel per kategori untuk dianalisis secara kuantitatif menggunakan metode HPLC di Laboratorium Balai Besar Pusat Penelitian dan Pengembangan Pascapanen Pertanian, Bogor. Makanan yang terdeteksi mengandung boraks paling tinggi diperlakukan dengan cara direbus dalam beberapa rentang waktu (5 menit, 15 menit, dan 30 menit) dan digoreng sampai matang (tidak sampai gosong). Data yang dikumpulkan dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa 54% dari sampel makanan yang diperoleh dari Sekolah Dasar positif mengandung boraks; sebanyak 74% dari sampel makanan yang diperoleh dari pasar tradisional positif mengandung boraks; sementara semua sampel berasal dari supermarket tidak terdeteksi mengandung boraks. Kandungan boraks dalam makanan yang terdeteksi dalam penelitian ini berkisar antara 560 mg/kg sampai dengan 17.640 mg/kg. Kandungan tertinggi ditemukan dalam mie basah kuning (17.640 mg/kg) jauh di atas kadar maksimum yang ditentukan EFSA (2013) sebanyak 4.000 mg/kg. Proses perebusan cukup efektif dalam menurunkan kadar boraks dalam makanan, sedangkan proses penggorengan tidak mengurangi kadar boraks dalam makanan.

KONSENTRASI TIMBAL (Pb) PADA PERAIRAN DI SEKITAR TELUK JAKARTA Maman Rumanta; Amril Latief; Ucu Rahayu; Anna Ratnaningsih; Gusti Nurdin
Jurnal Matematika Sains dan Teknologi Vol. 9 No. 1 (2008)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.911 KB)

he purpose of this study is to get information about river that has the greatest contribution to cause Pb pollution in the Jakarta Bay. Nine (9) of 13 rivers flowing into Jakarta Bay were chosen. They were Citarum, Bekasi, Cilincing, Marunda, Ciliwung, Sunter, Cideng, Angke, and Cisadane. Sampling were taken in two periods of times, rainy and dry season of 2006 with triple repeatations. pH and temperature of samples as proponent data were measured insitu. Pb concentration in the water of the river was measured by using AAS flame in the laboratory of Balai Penelitian Tanah Bogor. Data was analyzed statistically (one way ANOVA and t-test) by using SPSS 11.5 software. It was shown that Pb concentration of estuary water surrounding Jakarta Bay has been exceeding threshold level. There was a tendency that Pb concentrations of water in rainy season are lower than that in dry season except in Ciliwung River. The anomaly of Ciliwung River was probably caused by some industries which throw their wastes into Ciliwung River in the rainy season. It was concluded that all of 9 rivers have a significant contribution to Pb pollution in Jakarta Bay, and the most was from Ciliwung River.

KANDUNGAN TIMBAL CRUSTACEA DI MUARA ANGKE DI SEKITAR TELUK JAKARTA Maman Rumanta
Jurnal Matematika Sains dan Teknologi Vol. 6 No. 2 (2005)
Publisher : LPPM Universitas Terbuka

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The study was conducted to observe concentration of lead on Crustacean as a marine product of Muara Angke’s traditional fisherman of Jakarta Bay. Four species of Crustacean were selected as sample. Each sample was triple and collected in four sampling periods, east monsoon, transition period from east to west monsoon (transition period I), west monsoon, and transition period from west to east monsoon (transition period II). Lead concentrations of collected samples were tested using flame-AAS. The result indicated that lead concentration on meat of Crustacean was lower than the concentration on carapaces and gills. But each of the concentration was higher than maximum level proposed by CCFAC (1999). Commonly the concentration of lead on Crustacean especially on meat and gills were high during east monsoon, but low during west monsoon.

Polymorphism of Growth Hormone (GH) Gene in Lakor Goat from Lakor Island of Southwest Maluku Regency Rony Marsyal Kunda; Slamet Diah Volkandari; Maman Rumanta; Pieter Kakisina
Buletin Peternakan Vol 44, No 4 (2020): BULETIN PETERNAKAN VOL. 44 (4) NOVEMBER 2020
Publisher : Faculty of Animal Science, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21059/buletinpeternak.v44i4.58934

Lakor goat survive in Lakor island in Southwest Maluku with high temperature and limited water. Growth trait in goat is interest to explore cause related with economic trait that encoded by growth hormone (GH) gene. The aim of this study was identify of polymorphism GH gene of Lakor goat in Lakor island. A total of 63 samples were collected from three locations (village) i.e Ketti Letpey (18), Werwawan-Yamluli (26), and Letoda (19). DNA was extracted from hair follicles. A 422 bp specific DNA fragment was successfully amplified and genotyped by PCR-RFLP method using HaeIII enzyme. Results showed that polymorphism was found with two variant of genotypes (AA and AB) and two alleles (A and B). AB genotype was dominant in all of populations (93.7%) with A and B alleles were 0.53 and 0.47, respectively. Heterozygosity observed and expected value reached 0.502 and 0.498, respectively while Polymorphic Information Content was in moderate values (0.374). All of populations were in disequilibrium genetic. It maybe caused limited buck and nonrandom mating in population that effect of low genetic variation. Inbreeding study are needed to explore it. The introgression of bucks from other families in several locations within Lakor island can be an alternative solution to increase the genetic diversity of the lakor goat population.

LEARNING MODEL IMPROVED THINKING SKILLS TO IMPROVE THE STUDENT LEARNING OUTCOMES IN SCIENCE LEARNING Yus Alvar Saabighoot; Maman Rumanta
JPSD (Jurnal Pendidikan Sekolah Dasar) Vol 8, No 1 (2022): JPSD (Jurnal Pendidikan Sekolah Dasar)
Publisher : Department of Primary education, Faculty of Teacher Training and Education, Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/jpsd.v8i1.12537

AbstractThis research is motivated by the low quality of science learning in elementary schools. The objective of this research is to produce a product in the form of developing a learning model improved thinking skills to improve the student learning outcomes. This research uses a Research and Development approach. The research phase includes (a) preliminary study, (b) identification results which are used as the basis for model development, and (c) the models that have been developed are then tested extensively. During the model trial, modifications were made to the implementation of the model; adjustments were made according to the needs of teacher performance improvement. There is always an improvement in the model design, implementation, and evaluation of every trial that has been carried out. The results of the extensive trials show that the learning model improved thinking skills has a good effect on improving the student learning outcomes. Based on the statistical test through t-test = 0.05 (95% significance) obtained a significant difference in the learning outcomes in each trial. In conclusion, the learning model improved thinking skills can improve student learning outcomes in science learning and can improve the teacher’s performance in science learning. Keywords: Learning Model; Improved Thinking Skills

Pengaruh Asam Metoksiasetat terhadap Organ Reproduksi Mencit (Mus musculus) Swiss Webster Jantan Maman Rumanta; Tien W. Surjono; Sri Sudarwati
Journal of Mathematical and Fundamental Sciences Vol. 33 No. 2 (2001)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Sari. Asam metoksiasetat (MAA) merupakan salah satu metabolit dari dimetoksietil ftalat (DMEP) yaitu suatu senyawa yang banyak digunakan dalam pembuatan plastik sebagai pelentur (plasticizer). DMEP dapat luruh dari plastik dan bila masuk ke dalam tubuh manusia, zat ini diubah menjadi MAA yang dapat menyebabkan efek teratogenik dan toksik terhadap organ tubuh. Terutama organ reproduksi jantan. Untuk meneliti pengaruh MAA terhadap organ reproduksi jantan, digunakan mencit Swiss Webster umur 7 minggu, yang cliberi dosis 100, 150, 225, dan 300 mg/kg berat badan, secara gavage setiap hari selama 4 minggu berturut-turut, dengan satu hari istirahat pada tiap akhir minggu. Kelompok mencit kontrol hanya diberi akuabides sebagai pelarut MAA. Mencit dibunuh sehari setelah pemberian MAA terakhir. Pengamatan dilakukan terhadap berat testis, berat epididimis, dan berat vesikula seminalis; jumlah, motilitas, dan morfologi spermatozoa yang diperoleh dari epididimis kauda; struktur testis yang mencakup diameter, tebal epitel, dan penampilan tubulus seminiferus; jumlah sel spermatogenik, jumlah sel Sertoli, serta jumlah sel Leydig. Dibandingkan dengan kontrol, hasil pengamatan menuniukkan penurunan berat testis dan epididimis, tetapi tidak ada penurunan berat vesikula seminalis. Jumlah dan motilitas spermatozoa menjadi lebih rendah, sedangkan jumlah spermatozoa abnormal meningkat. Diameter dan tebal epitel tubulus seminiferus menurun, demikian pula persentase tubulus seminiferus normal (fase VII), sedangkan persenfase tubulus seminiferus abnormal meningkat. Pendedahan terhadap MAA menyebabkan berdegenerasinya sel-sel spermatogenik, terutama spermatosit pakhiten dans permatid, yang ditunjukkan oleh jumlahnya yang berkurang. Spermatogonium A dan spermatosit praleptoten paling tahan terhadap MAA. Jumlah sel Sertoli dan sel Leydig tidak menurun oleh perlakuan MAA meskipun tampak adanya gejala toksik pada sel Sertoli yang ditandai oleh vakuolisasi dalam sitoplasma. Dapat disimpulkan bahwa testis merupakan organ reproduksi yang paling sensitif terhadap pengaruh MAA yang mengakibatkan terganggunya spermatogenesis pada mencit Swiss Webster. Effects of Methoxyacetic Acid on the Reproductive Organs of Male Swiss Webster Mice (Mus Musculus)Abstract. Methoxyacetic acid (MAA) is one of the metabolites of dimethoxyethyl phthalate (DMEP), which is mainly used as plasticizer in the manufacture of plastics. DMEP could leach from plastics and by entering the body, it will be metabolized into MAA which is teratogenic and toxic to several organs, particularly male reproductive organs. To investigate the effects of MAA on the male reproductive organs, seven-week-old Swiss Webster mice were treated with MAA at the doses of 100, 150, 225, and 300 mg/kg body weight daily by gavage, within four consecutive weeks with one-day interruption in each weekend. Observation was performed on the weight of testis, epididymis and seminal vesicle; the number, motility, and morphology of the spermatozoa obtained from the caudal epididymist; the histological structure of testis, including diameter, epithelial thickness and the performance of seminiferous tubule; the number of spermatogenic cells, as well as the number of Sertoli and Leydig cells. Compared to control the result showed, that testis and epididymis, but not the seminal vesicle decreased in weight. The number and motility of spermatozoa decreased, whereas the abnormal ones increased. The diameter, the epithelial thickness, as well as the percentage of normal (stage VII) seminiferous tubules were reduced, while the percentage of abnormal tubules increased. The administration of MAA led to the degeneration of spermatogenic cells, particularly the pachytene spermatocyte and spermatids, shown by the reduction in their number. The spermatogonia A and the preleptotene spermatocytes were the most resistant spermatogenic cells to MAA. The number of Sertoli and Leydig cells were not affected by MAA, despite toxic phenomenon of Sertoli cells characterized by vacuolization in the cytoplasm was shown. It is concluded that testis is the most susceptible to MAA insult, which subsequently interferes the spermatogenesis of male Swiss Webster mice.

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